PROCESS FOR THE PREPARATION OF KETONE COMPOUNDS (IA), AND PROCESS FOR THE PREPARATION OF FORMULA TRI

专利摘要:
processes for preparing the compounds and compounds. The present invention relates to a process for the preparation of the ketone compounds (ia) and their use as intermediates for the preparation of triazole fungicides.
公开号:BR112016014018B1
申请号:R112016014018-4
申请日:2014-12-08
公开日:2021-08-24
发明作者:Uwe Josef Vogelbacher；Joachim Gebhardt；Michael Rack；Roland Gotz；Stefan Fülster
申请人:BASF Agro B.V.；
IPC主号:

专利说明:

FIELD OF THE INVENTION
[001] The present invention relates to a process for providing the substituted phenoxyphenyl ketones.
[002] Furthermore, the present invention relates to the intermediates of said process and the use of substituted phenoxyphenyl ketones obtained through the process of the present invention for the preparation of triazoles. BACKGROUND OF THE INVENTION
[003] The phenoxyphenyl substituted ketones provided through the process, according to the present invention, are valuable intermediates for the synthesis of triazole compounds that have pesticidal activity, in particular, the fungicidal activity. Publication WO 2013/007767 refers to fungicidal substituted compounds of 1-[4-phenoxy-2-(haloalkyl)phenyl]-2-(1,2,4-triazol-1-yl)ethanol, which can be synthesized by means of an intermediate compound of respective phenoxyphenyl substituted ketones. Publication WO 2014/108286 (EP patents 13,150,663.6; PCT / EP 2013/077083) describes an improved process for the synthesis of certain triazole fungicidal active compounds.
[004] Methods known from the literature are sometimes not suitable for the efficient synthesis of substituted phenoxyphenyl ketones since the yield is not sufficient and/or the reaction conditions and parameters such as solvents and/or catalysts and/or the ratio of reactants and ingredients to each other are not ideal or suitable for industrially relevant and high standard amounts. Inter alia, since said phenoxyphenyl substituted ketones are valuable intermediates for the synthesis of triazole compounds with promising fungicidal activity, there is a constant need for improved processes that easily make such intermediates and compounds available. DESCRIPTION OF THE INVENTION
[005] An object of the present invention was to provide an improved process for the synthesis of substituted phenoxyphenyl (IA) ketones which are valuable intermediates for the preparation of the triazole fungicidal active compounds.
[006] Surprisingly a highly efficient synthesis for the synthesis of the phenoxyphenyl substituted ketone compounds of Formula (IA) has now been discovered and therefore an efficient synthesis for the triazole compounds as active ingredients. Therefore, the present invention relates to a process for preparing ketone compounds (IA)
- which comprises the following steps: (i) the reaction of a compound of Formula (III)
- with R'-Mg-Hal (IV) or Mg and R1C(=O)Cl (V) in the presence of a Cu(I) catalyst in an amount of 0.005 to 0.065 molar equivalents per 1 mol of compound (III) ), to result in compounds II
(ii) the reaction of compound (ii) as defined in step (i) common phenol derivative of Formula (Vi)
- in the presence of a base, if R" is hydrogen;- wherein the variables are defined as follows:- X is F or Cl;- R1 is C1-C6 alkyl or C3-C8 cycloalkyl; and - R4 is F or Cl; - R' is C1-C4 alkyl or C3-C6 cycloalkyl; - Hal is halogen; e- R'' is hydrogen or an alkali metal cation.
[007] In process step (i), according to the present invention, substituted phenyl compounds of Formula (III) are used, wherein X is F or Cl.
[008] The 2-bromo-5-fluoro / chloro-benzotrifluoride of Formula (III) is reacted with the Grignard reagent R'-Mg-Hal (IV) or magnesium (Mg), and the acyl chloride R1C( =O)Cl (V) in the presence of a Cu(I) catalyst in an amount of 0.005 to 0.065 molar equivalents per 1 mol of compound (III).
[009] According to a preferred embodiment, the Grignard reagent R'-Mg-Hal (IV) is used in the process. R' in the Grignard reagent is C1-C4 alkyl or C3-C6 cycloalkyl, in particular it is selected from methyl, ethyl, isopropyl, tert-butyl, sec-butyl and cyclopropyl. Specifically, R' in the Grignard reagent is selected from isopropyl, tert-butyl, sec-butyl and cyclopropyl. In a specific embodiment, R’ is isopropyl. In another embodiment, R" is sec-butyl. Hal represents halogen, in particular Cl or Br. Also more than one Grignard reagent can be used in the same reaction, such as, for example, reagent (IV), where Hal is Br together with respective reagent (which has the same R'), where Hal is Cl. According to one embodiment, Hal is the Cl and R' in the Grignard reagent is selected from isopropyl, tert-butyl, sec-butyl and cyclopropyl. According to another embodiment, Hal is the Br and R' in the Grignard reagent is selected from isopropyl, tert-butyl, sec-butyl and cyclopropyl. In a preferred embodiment, in the process of the present invention, the Grignard reagent is (iso-propyl)-Mg-Cl or (iso-propyl)-Mg-Br. In another preferred embodiment, in the process of the present invention, the Grignard reagent is (sec-butyl)-Mg-Cl or (sec-butyl)-Mg-Br.
[010] Preferably, the Grignard reagent is used in an amount of 1 eq and 2 eq, in particular from 1.1 to 1.8 eq, more specifically from 1.2 to 1.6 eq, in relation to one equivalent of compound (III). In particular, amounts of 1.3 to 1.5, more especially 1.2 to 1.4 per mol of compound (III) can be favorable according to the present invention. In general, the Grignard reagent is used in excess, preferably a small excess.
[011] Another embodiment relates to the process of the present invention, in which Mg is used, therefore, forming a Grignard reagent with the compound (III) and reacting with the compound (V). It may be preferable if Mg is used in an amount slightly less than compound (III). At present, the same details apply with regard to solvents.
[012] As generally known to the person skilled in the art, the structure of a Grignard reagent can be described by the so-called Schlenck equilibrium. A Grignard reagent is subjected to a solvent-dependent equilibrium between different magnesium compounds. The Schlenck equilibrium for the Grignard reagent used in accordance with the present invention can be schematically illustrated as follows:

[013] In addition, it is known that solvent molecules, in particular ethers, such as diethyl ether or THF, which are commonly used for reactions with Grignard reagents, can be added to magnesium of Grignard's reagent, therefore, forming the etherates.
[014] Depending on the solvent used in the reaction of the present invention, the solvent molecules can be added to the Mg reagents, therefore, forming - in the case of using ethers - the respective etherates.
[015] For general information regarding the structures of Grignard reagents, see also Milton Orchin, Journal of Chemical Education, Volume 66, Number 7, 1999, pages 586-588.
[016] According to an embodiment of the process of the present invention, LiCl is added to the reaction mixture of step (i). According to an alternative, before contacting the Grignard reagent (IV) with the process reagents of the present invention, it is brought together with LiCl, therefore forming an addition product R'MgHal • LiCl ((IV) ) • LiCl). According to this alternative, ((IV) • LiCl) is then used in step (i). The use of LiCl together with Grignard reagents in general is known in the state of the art, see, for example, Angew. Chem. Int. Ed. 2004, 43, 3333 and Angew. Chem. Int. Ed. 2006, 45, 159.
[017] Grignard reagents (IV) or their addition products with LiCl ((IV) • LiCl) are commercially available or can be carried out according to procedures well known to the person skilled in the art (see Angew. Chem. Int. Ed. 2004, 43, 3333).
[018] The educt reaction (III)
- with a suitable Grignard reagent (IV) or a mixture of suitable Grignard reagents can lead to the following specific compounds, where "Ar" represents the respective substituted phenyl moiety, resulting from the compound (III) which has been reacted with the reagent de Grignard, as defined herein, in particular, where X is the F or Cl, that is, "Ar1" and "Ar2", respectively. During the reaction, different from said Grignard species can occur and also multiples can be formed in parallel:

[019] Some of the compounds include solvent molecules such as THF (tetrahydrofuran), as illustrated in the following. It is apparent to the person skilled in the art that other solvent molecules may also be present, depending on the solvent used in the reaction. Also these addition products with solvent molecules are encompassed by the present invention.
[020] In general, the Grignard species formed during the reaction of (III) with the Grignard reagent (IV) can be represented as the species "Ga" and "Gb":

[021] Depending on the Grignard (IV) reagent used, Ga or Gb can occur alone or Ga and Gb can be formed. As described above, other Grignard species from those detailed below can be formed during the reaction and the different species can be converted to each other. *Note 1: "Ar1" or "Ar2", or Cl or Br, which have two bonds represents a three-center-two-electron bond



*Note 2: If Mg carries four substituents, it is tetrahedrally coordinated. Therefore, depending on the specific structure, stereoisomers (diastereomers and/or enantiomers) can occur (marked with *). This is demonstrated in a specific example, as follows:

[022] The different magnesium compounds occurring in the process of the present invention, especially of the type as shown above, and possible adducts with the solvent molecules are also an aspect of the present invention.
[023] In the carbonyl chloride R1C(=O)Cl (V) and in the compounds (II), (IA), (IB) and (IC), respectively, R1 is the C1-C6 alkyl or C3-C8 cycloalkyl, in particular selected from CH3, CH(CH3)2 and cyclopropyl.
[024] According to one embodiment, R1 is C1-C6 alkyl, more specifically, C1-C4 alkyl, especially selected from CH3, C2H5, n-C3H7, CH(CH3)2, n-butyl , iso-butyl and tert-butyl, more especially selected from CH3, C2H5, CH(CH3)2 and C(CH3)3. According to another embodiment, R1 is C3-C8 cycloalkyl, in particular C3-C6 cycloalkyl, such as C3H5 (cyclopropyl), C4H7 (cyclobutyl), cyclopentyl or cyclohexyl. Another embodiment relates to compounds, wherein R1 is C3H5 (cyclopropyl) or C4H7 (cyclobutyl), more specifically, cyclopropyl.
[025] The carbonyl chloride R1C(=O)Cl(V), preferably, is used in an equimolar amount or in excess compared to the reagent of Formula (III). Specifically, carbonyl chloride is used in an amount of 1 eq to 3 eq, in particular 1.1 to 2.5 eq, more specifically 1.2 to 2 eq, relative to one equivalent of the compound (III ). In particular, amounts of 1.3 to 1.8 eq, more specifically 1.4 to 1.6 eq per mole of compound (III) may be favorable according to the present invention. Typically, carbonyl chloride is used in excess, preferably in a small excess.
[026] The Grignard reagent is added as is common to the person skilled in the art. In particular, it can be added as a solution in a suitable solvent such as tetrahydrofuran (THF), 1,4-dioxane, diethyl ether and 2-methyl-tetrahydrofuran.
[027] Examples of suitable solvents for step (i) of the process of the present invention are aprotic organic solvents such as, for example, diethyl ether, tetrahydrofuran (THF), methyl-tert-butyl ether (MTBE) , toluene, ortho-xylene, meta-xylene, para-xylene and mixtures thereof. Typically, the Grignard reagent is added as a solution in THF, 1,4-dioxane, diethyl ether or 2-methyl-tetrahydrofuran (2-Me-THF), especially in THF or diethyl ether, to the vessel or reaction vessel containing reagent (III) and a solvent such as, for example, toluene, MTBE, ortho-xylene, meta-xylene, para-xylene, mesitylene and/or diisopropyl ether, in particular the toluene, MTBE and/or ortho-xylene.
[028] The reaction temperature during the addition of the Grignard reagent in step (i) is preferably carried out at a maximum of 50°C, in particular at a maximum of 40°C, preferably at a maximum of 35°C. In general, it preferably has a reaction temperature of 20°C to 45°C, in particular from room temperature to 45°C, in particular from 25°C to 40°C. realization, the temperature is from 20°C to 35°C, especially from 25°C to 30°C.
[029] In the further course of reaction step (i), the temperature is preferably maintained at a maximum of 60°C, in particular at a maximum of 50°C, preferably at a maximum of 45°C In general, it preferably has a reaction temperature of from 30°C to 50°C, in particular from 35°C to 45°C. In another embodiment, the temperature is from 20°C to 35°C, especially from 25°C to 30°C.
[030] A Cu(I) catalyst suitable for the process of the present invention is a Cu(I) or Cu(I) oxide salt, in particular a Cu(I) salt such as Cu( I)Cl or Cu(I)Br or any of their mixtures. According to a specific embodiment, Cu(I)Cl is used. According to the present invention, the Cu(I) catalyst is present in an amount of 0.005 to 0.065 molar equivalents per 1 mol of the compound (III). It is essential for the present invention that the Cu(I) catalyst is used in the range of 0.005 to 0.065 molar equivalents per 1 mol of the compound (III) defined by the present invention. Surprisingly it has been found that lower or higher amounts of Cu(I) catalyst are unfavorable due to significantly lower yields, high amounts of Cu(I) catalyst lead to increasing phase separation problems, high costs for the catalyst. Cu(I) and high amounts of undesired toxic Cu(I) and/or Cu(II) in the wastewater, in turn, leading to higher process costs for their removal. The present inventions avoid these disadvantages and provide a process suitable for the high standard industrial range.
[031] It may be preferable if 0.005 to 0.055 molar equivalents are used per 1 mol of the compound (III). Furthermore, it can be preferably if from 0.055 to 0.045 molar equivalents per 1 mol of the compound (III), more specifically, from 0.005 to 0.04 molar equivalents per 1 mol of the compound (III) are used. In particular, the amount of Cu(I) catalyst is from 0.01 to 0.03 molar equivalents per 1 mol of compound III, more especially from 0.015 to 0.025 molar equivalents, even more especially from 0.015 to 0.02, per 1 mol of compound III, specifically from 0.018 to 0.023 molar equivalents per 1 mol of compound (III). According to one embodiment, the Cu(I) catalyst is added in several portions to the reaction mixture, for example, in two portions at half the total amount.
[032] A suitable course of reaction is such that the Grignard reagent is first reacted with the compound of Formula (III) and then this reaction mixture is added to the carbonyl chloride and a portion of the Cu catalyst (I) in particular half the total amount of catalyst (I) Cu. After about half of the Grignard mixture is added to the carbonyl chloride reaction mixture, the remaining amount of Cu(I) is added. According to another embodiment, the entire amount of Cu(I) catalyst is added in one portion.
[033] By means of the process step of the present invention (i), the compounds of Formula (II) can be prepared in surprisingly high yields. Preferably, yields are at least 60%, more preferably 70%, even more preferably at least 75%, even more preferably at least 80%.
[034] After step (i), a processing of the reaction mixture can be carried out by procedures generally known to the person skilled in the art. Usually, after completion of the reaction, water is added and the organic phase is washed with water, then the solvent is removed from the separated organic phases. Favorably, the crude product thus obtained is directly used in step (ii) of the process of the present invention. However, the crude product can still be processed and/or purified as generally known to the person skilled in the art. If this is considered appropriate, the reaction mixture is extracted with a suitable organic solvent (eg aromatic hydrocarbons such as toluene and xylenes) and the residue, if necessary, is purified by recrystallization and/or chromatography.
[035] By means of the process of the present invention, compounds of Formula (II) can be prepared in surprisingly high yields. Preferably, yields are at least 60%, more preferably at least 70%, even more preferably at least 75%, even more preferably at least 80%.
[036] According to an embodiment of the present invention, in step (i) no AICI3 is added to the reaction. Consequently, the reaction is carried out in the absence of or at least essentially without the AICI3. In particular, most traces of AlCl3 are present, such as at most 0.0065% by mol of AlCl3, for example traces due to impurities from other reagents. Surprisingly, it has been found that, contrary to what is taught in the prior art, the addition of AlCl3 is unfavorable. It has been found that no addition of AlCl3 in accordance with this embodiment of the present invention leads to higher yields.
[037] According to step (ii) of the process of the present invention, compounds (II) react with a phenol of Formula (VI)
- in the presence of a base.
[038] R'' in Formula (VI) is hydrogen ((IV) is a substituted phenol) or an alkali metal cation ((VI) is a substituted phenolate). R4 in Formula (VI) and Formulas (IA), (IB) and (IC), respectively, is F or Cl, in particular Cl.
[039] As described above, the compound (II) can be directly used from step (i) without further purification or can be used in purified form.
[040] Examples of suitable solvents for step (ii) of the process of the present invention are aprotic organic solvents, such as, for example, dimethyl formamide (DMF), N-methyl pyrrolidone (NMP), imidazolidinone of dimethyl (DMI), toluene, o-xylene, dimethylactamide (DMA) and any mixtures thereof. In particular, DMF, NMP, toluene and DMA or any mixtures, more specifically DMF, are especially suitable.
[041] It can be preferably, if the solvent used in step (ii) does not contain an amount greater than 3 equivalents of DMF in relation to 1 eq of the phenol of Formula (VI), in particular, not greater than 2.8 eq to 1 eq of Formula (VI) phenol, more specifically not more than 2.6 eq to 1 eq of Formula (VI) phenol. It may be preferable if amounts of no more than 2.4, specifically no more than 2.2 eq of DMF are used in the process of the present invention.
[042] The base used in step (ii) is preferably an inorganic base, according to an embodiment selected from NaOH, KOH, Na2CO3 and K2CO3, more specifically, from Na2CO3 and K2CO3. According to a special realization, Na2CO3 is used. According to another special realization, K2CO3 is used.
[043] The base can be used in solid form or as a solution, for example, as an aqueous solution.
[044] The reagents for step (ii) are preferably added at room temperature and the reaction temperature is then raised, whereby the reaction temperature after the reagents are added is preferably maintained at a maximum of 150°C, in particular a maximum of 140°C, more preferably a maximum of 130°C. In general, preferably, it has a reaction temperature of 20°C to 135°C, in particular from 50°C to 135°C, more especially from 100°C to 130°C.
[045] After step (ii), a processing of the reaction mixture can be carried out by procedures generally known to the person skilled in the art. In general, water is added and the aqueous phase is extracted with a suitable solvent, for example toluene or o-xylene. The crude product obtained after evaporation of the solvent(s) can be directly used in the next step, if desired. However, the crude product can still be processed and/or purified as generally known to the person skilled in the art.
[046] According to one embodiment of the present invention, after completion of the reaction, most of the solvent (eg, DMF or toluene) is removed from the reaction mixture, preferably under reduced pressure. Then, a suitable organic solvent, such as, for example, toluene or o-xylene, is added together with water. According to the process of the present invention, it may be advantageous to carry out one to three, preferably two, extractions from the aqueous phase.
[047] By means of the process of the present invention, compounds of Formula (IA) can be prepared in surprisingly high yields. Preferably, the yields of step (ii) are at least 60%, more preferably at least 70%, even more preferably at least 75%, even more preferably at least 80%.
[048] By means of the process of the present invention, compounds of Formula (IA) can be prepared in surprisingly high yields. Preferably, the yields of steps (i) and (II) are at least 60%, more preferably at least 70%, even more preferably at least 75%, even more preferably at least , 80%.
[049] The starting compounds (III) for the processes of the present invention can be synthesized as is known to the person skilled in the art or are also partially commercially available.
[050] In general, an unwanted by-product in the synthesis of compounds (IA), especially during step (i), which can occur in undesirable amounts, is the biphenyl compound (Y1)
- where X is the F or Cl.
[051] According to the reaction conditions of the present invention, it is possible to reduce the amount of (Y1). Consequently, according to the process of the present invention, it is possible to improve the yield of the desired compounds.
[052] In addition, the reactants in the process of the present invention may contain the impurities of isomers of compound (III), in which Br is attached to another position in the phenol. Consequently, secondary products (Y2), (Y3) and/or (Y4) can occur:

[053] In particular, the possible by-products (Y2), (Y3) and (Y4), depending on the meaning of the variables R1 and R4, are described in Table Y. In the present, each line corresponds to a compound of Formula (Y2 ), (Y3) or (Y4):


[054] The ketone (IA) obtained, according to the process of the present invention, can be used as a reagent for the synthesis of an oxirane of Formula (IB) which are useful intermediates for the synthesis of active ingredients of triazole of Formula ( IC), which are effective against phytopathogenic fungi. See, in particular, publication WO 2013/007767. In EP 13150663.6 favorable details of the process are described. See also JACS 1965, 87, page 1353 ff, Heterocycles 8, 1977, page 397 ff, Synth. Communications, 15, 1985, page 753, J. Agric. Chem food. 2009, 57, 4,854-4,860 and patent DE 3,733,755.
[055] Consequently, according to another embodiment of the present invention, after step (ii), the process further comprises step e: (111) of the reaction of a ketone of Formula (IA), as defined in step, ( ii) to result in oxiranes (IB)
- wherein R1 and R4 are defined as described and preferably described herein, especially in the context of Formulas (IA), (II) and (III).
[056] In this step of the process, to obtain an oxirane from the keto group, the compound (IA) is preferably reacted with a trimethylsulf(ox)onium halide ((CH3)3S+(O)Hal) (VII) or trimethylsulfonium methylsulfate of Formula (VIII) (CH3)3S+CH3SO4-.
[057] According to one embodiment, in process step (iii), the ketone (IA) is reacted with the formula VIII trimethylsulfonium methylsulfate (CH3)3S+CH3SO4-, preferably in aqueous solution in the presence of a base.
[058] Step (iii) for the preparation of oxiranes (IB) especially is as follows: (iii) the reaction of an oxo compound of Formula (IA) with trimethylsulfonium methylsulfate of Formula VII-VIII: (CH3) 3S+CH3SO4-- in aqueous solution in the presence of a base, wherein the variables R1, R4 are defined as given and preferably described herein for compounds (IA).
[059] In this step of the process (iii) using the formula VIII trimethylsulfonium methylsulfate, preferably from 1 to 4 equivalents, in particular from 1.2 to 3.5 eq, more specifically from 1.5 to 3 .3 eq of water relative to one equivalent of compound (IA) are used. It may be favorable, if an amount greater than 1.5 equivalents of water, in particular, greater than 1.5 eq of water to 4 eq of water, more specifically, greater than 1.5 eq of 3.5 eq of water, even more especially, greater than 1.5 eq of water to 2.5 eq of water per mole of compound (IA) is used. In particular, the proportions from 1.6 to 3.8, more specifically, from 1.7 to 3.3 eq, more specifically, from 1.8 to 2.8 eq or from 1.9 to 2.5 of water per mol of compound (IA) may be favorable according to the present invention.
[060] The reagent VIII, preferably, is used in an amount of 1.1 to 2.5, in particular, from 1.2 to 2, more specifically, from 1.3 to 1.6 equivalents of VIII per 1 equivalent (mol) of compound (IA).
[061] In general, the Formula VIII reagent can be prepared from dimethyl sulfide and dimethyl sulfate. According to one embodiment, reagent VIII is prepared in situ by adding dimethyl sulfate to the reaction mixture containing the dimethyl sulfide. Dimethyl sulfide, in general, is used in excess.
[062] Preferably used as reagent VIII, an aqueous solution of trimethylsulfonium methylsulfate containing from 33 to 37% by weight, preferably from 34 to 36% by weight, more specifically from 34 to 35.3% in weight, even more specifically from 34.3 to 35.9% by weight, of trimethylsulfonium cation.
[063] In particular, the reagent VIII solution contains from 33 to 37% by weight, preferably from 34 to 36% by weight, more specifically from 34 to 35.3% by weight, even more specifically from 34 0.3 to 35.9% by weight of trimethylsulfonium cation. Consequently, the amount of trimethylsulfonium methylsulfate in the reagent, measured as the sum of trimethylsulfonium cation and methylsulfate anion, is from about 80 to 90% by weight, preferably from about 83 to 88% by weight, more specifically, from about 83 to 86% by weight. Quantification, for example, can be performed by means of quantitative NMR spectroscopy.
[064] The viscosity of the aqueous solution of reagent VIII is comparatively low. The solutions are stable at room temperature, especially at 25°C, and can be stored longer. In particular, the reagent solution does not crystallize during storage over a longer time, such as several weeks, for example up to 12 weeks, at temperatures of 10 to 25°C.
[065] The reagent can be prepared by adding dimethyl sulfate to water and dimethyl sulfide. Dimethyl sulfide is normally used in excess, generally from 2 to 8, preferably from 4 to 6, more specifically from 4.5 to 5.5, equivalents.
[066] In preparing the aqueous solution of reagent VIII, preferably from 1.3 to 2.2 eq, more preferably from 1.45 to 2.0 eq of water relative to dimethyl sulfate are used.
[067] Preferably, the temperature of the reaction mixture during the addition of dimethyl sulfate is room temperature, especially from 25°C to 40°C.
[068] The aqueous reagent separates as the lowest phase and can still be used as such.
[069] It has been proven that the use of aqueous solution of reagent VIII is very efficient, also for high standard reaction conditions, since it is stable and since it contains a defined amount of reagent, so that reagent VIII It can be easily and accurately dosed for mixing reaction.
[070] Therefore, it is a preferred embodiment, if reagent VIII is added as an aqueous solution of trimethylsulfonium methylsulfate which contains from 33 to 37% by weight, preferably from 34 to 36% by weight, more specifically, from 34 to 35.3% by weight, even more specifically from 34.3 to 35.9% by weight of trimethylsulfonium cation.
[071] The base used in step (iii) is preferably selected from KOH and NaOH. In a preferred embodiment, KOH is preferably used as solid pellets or flakes. Preferably at least 3 equivalents of base, preferably at least 3.2 eq, more specifically at least 3.4 eq per 1 equivalent of compound (IA) are used. It may be preferably if the amount of base is 3 to 6 equivalents, more specifically 3 to 5 equivalents per mole of compound (IA).
[072] According to an embodiment of the process of the present invention, dimethyl sulfide is also used as a solvent in step (iii). According to another embodiment, an additional solvent is used. In particular a suitable aprotic organic solvent such as, for example, diethyl ether, methyl tert-butyl ether, chlorobenzene, xylene or toluene.
[073] The reaction temperature in step (iii) is preferably maintained at a maximum of 50°C, in particular a maximum of 45, preferably a maximum of 40°C. , preferably is, have a reaction temperature of at least 20°C, especially at least room temperature, especially at least 25°C. In another embodiment, the temperature is at least 30°C. It may preferably be that the temperature is at least 35°C.
[074] The oxiranes of Formula (IB) can be prepared in high yields. Preferably, yields are at least 60%, more preferably 70%, even more preferably at least 75%, even more preferably at least 80%.
[075] The order of addition of reactants to the reaction mixture is variable. In one embodiment, the base is added to the solution of compound (IA) and first the solvent and then reagent VIII is added. According to the realization, reagent VIII is first added to the compound (IA) solution and then the base is added. According to another embodiment, a solution of compound (IA) and reagent VIII are simultaneously added to the base. In the latter embodiment, the base is preferably suspended in sufficient solvent and stirred during addition of the reactants.
[076] For example, if the by-products are contained in the starting material, also the respective undesirable by-products of oxirane from this step of the process to obtain the oxirane (IB) can occur in the reaction. Consequently, the secondary products (Z2),

[077] In particular, the possible secondary products (Z2), (Z3) and (Z4), depending on the meaning of the variables R1 and R4, are described in TableZ. In the present, each line corresponds to a compound of Formula (Z2), (Z3) or (Z4):


[078] Oxiranes (IB) can still react with a triazole of Formula (IC)
- wherein the variables R1 and R4 are defined and preferably defined herein, and wherein the specific combinations for R1 and R4 are given in Table Y above, e-R2 is hydrogen, C1-C6 alkyl, C2 alkenyl -C6, C2-C6 alkynyl, C3-C8 cycloalkyl, C3-C8 cycloalkyl-C1-C6 alkyl, phenyl, phenyl-C1-C4 alkyl, phenyl-C2-C4 alkenyl or phenyl-C2-C4 alkynyl; aliphatic portions of R2 are not yet substituted or carry one, two, three or up to the maximum possible number of identical or different R12a groups that are independently selected from:- R12a is halogen, OH, CN, nitro, C1-alkoxy C4, C3-C8 cycloalkyl, C3-C8 halocycloalkyl and C1-C4 haloalkoxy;- wherein the cycloalkyl and/or phenyl moieties of R2 are not yet substituted or carry one, two, three, four, five or up to the maximum number of identical or different R12b groups, which independently, are selected from:- R12b is halogen, OH, CN, nitro, C1-C4 alkyl, C1-alkoxy C4, C1-C4 haloalkyl, C3-C8 cycloalkyl, C3-C8 halocycloalkyl and C1-C4 haloalkoxy.
[079] Consequently, according to another embodiment of the present invention, after step (iii), the process still comprises step: (iv) of the reaction of the oxirane of Formula (IB), as defined in step (iii) with the 1H-1,2,4-triazole and a base, resulting in compounds of Formula (IC), where R2 is hydrogen (compounds IC-1)
- and, to obtain the compounds (IC), in which R2 is different from hydrogen (compounds IC-2); (v) from the derivatization of the compound of Formula (IC-1), as defined in step (iv) under conditions basic with R2-LG, where LG is a nucleophilically substitutable leaving group; to result in compounds (IC-2).
[080] Accordingly, a further aspect of the present invention relates to a process for preparing the triazole compounds of Formula (IC)
- comprising the following steps: (i) as described herein; (ii) as described herein; (iii) the reaction of a ketone of Formula (IA), as defined in step (ii), in particular, with a trimethylsulfonium halide ((CH3)3S+(O)Hal) (VII) or trimethylsulfonium methylsulfate of Formula (VIII) (CH3)3S+CH3SO4-, to give oxiranes (IB);- e(iv) ) of the reaction of oxirane (IB), as defined in step (iii) with 1H-1,2,4-triazole in the presence of a base to obtain compounds (IC), where R2 is hydrogen (compounds IC -1); and, to obtain the compounds in which R2 is different from hydrogen: (v) from the derivatization of the compound of Formula (IC-1), as defined in step (iv), under basic conditions with R2-LG, in which LG is a nucleophilically substitutable leaving group; to result in compounds (IC-2).
[081] According to one embodiment, oxirane (IB) is prepared by reacting the respective compound containing the oxo group (IA) with the halides of trimethylsulf(ox)onium ((CH3)3S+(O)Hal), preferably trimethylsulfoniumiodide, preferably in the presence of a base such as sodium hydroxide (see also JACS 1965, 87 page 1353).
[082] According to one embodiment, oxirane (IB) is prepared by reacting the respective compound containing the oxo group (IA) with the formula (VIII) trimethylsulfonium methylsulfate (CH3)3S+CH3SO4-, as detailed above.
[083] The LG represents a nucleophilically substitutable leaving group such as halogen, alkylsulfonyl, alkylsulfonyloxy and arylsulfonyloxy, preferably, chlorine, bromine or iodine, especially preferably, bromine.
[084] According to one embodiment, R2 is selected from C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C8 cycloalkyl, C3-C8 cycloalkyl-C1-C4 alkyl, phenyl, phenyl-alkyl C1-C4, phenyl-C2-C4 alkenyl and phenyl-C2-C4 alkynyl, wherein R2 in each case is unsubstituted or is substituted by R12a and/or R12b as defined and preferably defined herein .
[085] According to another embodiment, R2 is C1-C6 alkyl, especially C1-C4 alkyl, such as CH3, C2H5, CH(CH3)2, CH2CH2CH3, CH2CH2CH2CH3, CH2CH(CH3)2. A further embodiment relates to compounds, wherein R2 is C1-C6 alkyl, in particular C1-C4 alkyl, is substituted by one, two, three or up to the maximum possible number of identical or different R12a groups as defined and preferably defined herein. According to a specific embodiment thereof, R2 is C1-C6 haloalkyl, in particular C1-C4 haloalkyl, more especially C1-C2 haloalkyl. According to another specific embodiment thereof, R2 is C1-C4 alkoxy-C1-C6 alkyl, in particular C1-C4 alkoxy-C1-C4 alkyl, such as CH2OCH3 or CH2CH2OCH3. According to yet another specific embodiment thereof, R2 is hydroxy-C1-C6 alkyl, in particular hydroxy-C1-C4 alkyl, such as CH2CH2OH.
[086] According to yet another embodiment, R2 is C3-C8 cycloalkyl-C1-C6 alkyl, in particular C3-C6 cycloalkyl-C1-C4 alkyl. Another embodiment relates to compounds, wherein R2 is C3-C8 cycloalkyl-C1-C6 alkyl, in particular C3-C6 cycloalkyl-C1-C4 alkyl, more especially C3-C6 cycloalkyl-C1-C2 alkyl, which is substituted by one, two, three or up to the maximum possible number of identical or different R12a groups in the alkyl portion and/or substituted by one, two, three, four or five or up to the maximum possible number of identical or different R12b groups in the cycloalkyl portion. R12a and R12b, in each case, are as defined and preferably defined herein.
[087] According to another embodiment, R2 is C2C6 alkenyl, especially C2-C4 alkenyl, such as CH2CH=CH2, CH2C(CH3)=CH2 or CH2CH=CHCH3. Another embodiment relates to compounds, wherein R2 is C2-C6 alkenyl, in particular C2-C4 alkenyl, which is substituted by one, two, three or up to the maximum possible number of identical or different R12a groups, depending on defined and preferably defined in the present. According to a specific embodiment thereof, R2 is C2-C6 haloalkenyl, in particular C2-C4 haloalkenyl, such as CH2C(Cl)=CH2 and CH2C(H)=CHCl. According to an even more specific embodiment thereof, R2 is C3-C8 cycloalkyl-C2C6 alkenyl or C3-C8 halocycloalkyl-C2-C6 alkenyl, in particular C3-C6 cycloalkyl-C2-C4 alkenyl or C3-C6 halocycloalkyl C2-C4 alkenyl.
[088] According to yet another embodiment, R2 is C2C6 alkynyl, especially C2-C4 alkynyl, such as CH2C CH or CH2C CCH3. A further embodiment relates to compounds, wherein R2 is C2-C6 alkynyl, in particular C2-C4 alkynyl, which is substituted by one, two, three or up to the maximum possible number of identical or different R12a groups, depending on defined and preferably defined in the present. According to a specific embodiment thereof, R2 is C2-C6 haloalkynyl, in particular C2-C4 haloalkynyl. According to an even more specific embodiment thereof, R2 is C3-C8 cycloalkyl-C2C6 alkynyl or C3-C8 halocycloalkyl-C2-C6 alkynyl, in particular C3-C6 cycloalkyl-C2-C4 alkynyl or C3-C6 halocycloalkyl C2-C4 alkynyl.
[089] According to yet another embodiment, R2 is phenyl-C1-C4 alkyl, in particular phenyl-C1-C2 alkyl, such as benzyl, wherein the alkyl portion in each case is unsubstituted or carries one, two or three R12a, as defined and preferably defined herein, in particular selected from halogen, in particular, F and Cl, alkoxy C1-C4, in particular, OCH3, and CN, and wherein the phenyl in each case is is unsubstituted or carries one, two or three R12b, as defined and preferably defined herein, in particular selected from halogen, in particular, Cl and F , C1-C4 alkoxy, in particular OCH3, C1-C4 alkyl, in particular CH3 or C2H5, and CN.
[090] According to yet another embodiment, R2 is phenyl-C2-C4 alkenyl, in particular phenyl-C2-C3 alkenyl, such as phenylethenyl, wherein the alkenyl portion in each case is unsubstituted or carries one, two or three R12a, as defined and preferably defined herein, in particular selected from halogen, in particular, F and Cl, alkoxy C1-C4, in particular, OCH3, and CN, and wherein the phenyl, in each case, is unsubstituted or carries one, two or three R12b, as defined and preferably defined herein, in particular selected from halogen, in particular, Cl and F, C1-C4 alkoxy, in particular, OCH3, C1-C4 alkyl, in particular, CH3 or C2H5, and CN.
[091] According to yet another embodiment, R2 is phenyl-C2-C4 alkynyl, in particular phenyl-C2-C3 alkynyl, such as phenylethynyl, wherein the alkynyl portion, in each case, is unsubstituted or carries one, two or three R12a, as defined and preferably defined herein, in particular selected from halogen, in particular, F and Cl, C1-C4 alkoxy, in particular, OCH3, and CN, and wherein the phenyl, in each case, is unsubstituted or carries one, two or three R12b, as defined and preferably defined herein, in particular selected from halogen, in particular, Cl and F, C1-C4 alkoxy, especially OCH3, C1-C4 alkyl, especially CH3 or C2H5, and CN.
[092] According to yet another embodiment, R2 is C3-C8 cycloalkyl, in particular C3-C6 cycloalkyl, such as C3H5 (cyclopropyl), C4H7 (cyclobutyl), cyclopentyl or cyclohexyl. Another embodiment concerns compounds, wherein R2 is C3-C8 cycloalkyl, in particular C3-C6 cycloalkyl, such as C3H5 (cyclopropyl) or C4H7 (cyclobutyl), which is substituted by one, two, three, four or five or up to the maximum possible number of identical or different R12b groups as defined and preferably defined herein. According to a specific embodiment thereof, R2 is C3-C8 halocycloalkyl, in particular C3-C6 halocycloalkyl, such as halocyclopropyl, in particular 1-F-cyclopropyl or 1-Cl-cyclopropyl. According to an even more specific embodiment thereof, R2 is C3-C8 cycloalkyl-C3-C8 cycloalkyl, in particular C3-C6 cycloalkyl-C3-C6 cycloalkyl, wherein each of said cycloalkyl-cycloalkyl moieties is not substituted for or carries one, two or three R12b as defined and preferably defined herein.
[093] According to yet another embodiment, R2 is phenyl, wherein the phenyl is unsubstituted or carries one, two, three, four or five independently selected R12b, as defined and preferably defined herein, especially , selected from halogen, in particular, Cl and F, C1-C4 alkoxy, in particular, OCH3, C1-C4 alkyl, in particular, CH3 or C2H5, and CN.
[094] In another embodiment of the present invention, R2 is selected from C1-C6 alkyl, C2-C6 alkenyl and C2-C6 alkynyl, wherein R2 in each case is unsubstituted or is substituted by R12a and /or R12b as defined and preferably defined herein. In each case, the substituents may also have the preferred meanings for the respective substituent as defined above.
[095] R12a according to the present invention is independently selected from halogen, OH, CN, nitro, C1-C4 alkoxy, C3-C8 cycloalkyl, C3-C8 halocycloalkyl and C1-C4 haloalkoxy. According to one embodiment R12a is independently selected from halogen, OH, CN, C1-C2 alkoxy, C3-C6 cycloalkyl, C3-C6 halocycloalkyl and C1-C2 haloalkoxy. Specifically, R12a is independently selected from F, Cl, OH, CN, C1-C2 alkoxy, cyclopropyl, 1-F-cyclopropyl, 1-cyclopropyl-Cl and C1-C2 haloalkoxy.
[096] R12b, according to the present invention, independently, is selected from halogen, OH, CN, nitro, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C3-C8 cycloalkyl, C3-halocycloalkyl C8 and C1-C4 haloalkoxy. According to one embodiment, R12b is independently selected from halogen, CN, nitro, C1-C2 alkyl, C1-C2 alkoxy, C1-C2 haloalkyl, C3-C6 cycloalkyl, C3-C6 halocycloalkyl, and C1-C2 haloalkoxy. Specifically, R12b is independently selected from F, Cl, OH, CN, nitro, CH3, OCH3, cyclopropyl, 1-F-cyclopropyl, 1-cyclopropyl-Cl and halomethoxy.
[097] For example, if by-products are contained in the starting material, also the respective unwanted triazole by-products can occur in the reaction:
[098] Consequently, the secondary products (T2), (T3) and/or (T4) can occur:

[099] In particular, the possible by-products (T2), (T3) and (T4), depending on the meaning of the variables R1 and R4, are described in Table T. In the present, each line corresponds to a compound of Formula (T2 ), (T3) or (T4):

[0100] An undesirable by-product of the triazole reaction is also the symmetric triazole

[0101] Consequently, the respective symmetric by-products, (T2), (T3) and/or (T4) can occur, called (Ts2), (Ts3) and (TS4), respectively:

[0102] In particular, the possible secondary products (Ts2), (Ts3) and (Ts4), depending on the meaning of the variables R1 and R4, are described in Table Ts. In the present, each line corresponds to a compound of Formula (Ts2), (Ts3) or (Ts4):


[0103] In one embodiment of the present invention, process (iv) is as follows: (vi) the reaction of oxirane (IB), as defined in step (iii) with 1H-1,2,4-triazole and a inorganic base to obtain compounds (IC), where R2 is hydrogen (compounds IC-1).
[0104] The inorganic base used in step (iv) is preferably selected from NaOH, KOH, Na2CO3 and K2CO3, more specifically from NaOH and KOH. According to one embodiment, NaOH is used. According to another embodiment, KOH is used.
[0105] According to a specific embodiment, the sodium salt of 1H-1,2,4-triazole as a base is used, wherein said sodium salt is prepared using the triazole and a base preferably selected to from NaOH, NaH and Na-alcoholates. See also patent DE 3,042,302.
[0106] The amount of base used in step (iv) is preferably equal to or less than 1 eq, in particular less than 1 equivalent, more preferably equal to or less than 0.8 eq, most preferably , equal to or less than 0.6 equivalents per 1 equivalent of compound (IB). Also preferably are amounts of base equal to or less than 0.4 equivalents, especially equal to or less than 0.2 equivalents, specifically equal to or less than 0.1 eq per 1 equivalent of compound (IB). Preferably at least 0.1 eq, more preferably at least 0.2 equivalent, especially at least 0.3, more specifically at least 0.4 eq of base per one equivalent of the compound (IB) are used.
[0107] The highest yields of compounds (IC-1) can be achieved, if an amount of less than 1 equivalent of base is used, relative to compound (IB). In its specific embodiments, NaOH is used as the base, preferably in an amount as described above, especially in an amount of 0.1 to 0.55 eq with respect to the oxirane of Formula (IB).
[0108] Preferably, to have the low reaction times, temperatures of at least 100°C, more preferably at least 110°C, especially at least 120°C are favorable. It is also an embodiment for refluxing the reaction mixture. Preferably, the reaction temperature is not higher than 150°C, in particular not higher than 140°C. Specifically, a reaction temperature of 120°C to 140°C is used.
[0109] The amount of 1H-1,2,4-triazole used in step (iv) is generally at least 1 equivalent per mole of oxirane (IB). According to one embodiment, 1H-1,2,4-triazole is used in excess relative to oxirane (IB). Preferably they are greater than 1 eq and 2 eq, preferably greater than 1 eq to 1.8 eq, most preferably greater than 1 eq to 1.6 eq. Mainly for economic reasons, it may be preferable to use at least 1.1 eq, specifically from 1.15 eq to 1.5 eq of triazole relative to oxirane (IB).
[0110] The solvent used in step (iv) is preferably selected from dimethylformamide, dimethylacetamide, N-methylpyrrolidone. Most preferred is dimethylformamide.
[0111] According to a preferred embodiment, the compounds (IC-1) resulting from step (iv) are from a suitable solvent, such as, for example, toluene, an aliphatic alcohol, acetonitrile, ethyl acetate and/or cyclohexane, in particular toluene and/or an aliphatic alcohol.
[0112] In particular, aliphatic alcohol is selected from methanol, ethanol, n-propanol, iso-propanol, n-butanol, isobutanol or any of their mixtures. In particular, aliphatic alcohol is selected from methanol and ethanol.
[0113] In general, for the crystallization step, the solvent, in particular dimethylformide as described above, is first largely evaporated, preferably under reduced pressure. Preferably at least 55% of the solvent, more preferably at least 60% of the solvent, more specifically at least 70% of the solvent is removed. Specifically, it may preferably be if at least 80%, more specifically at least 90% of the solvent, such as DMF, is removed. The solvent can then be recycled to be used again in process step (iv), if necessary, after being further rectified beforehand.
[0114] Then, water and its suitable solvent such as an ether, for example, diethyl ether, di-isopropyl ether, methyl-tert-butyl ether (MTBE), methylenechloride and/or toluene, in special, toluene, are added. Ethyl acetate may also be suitable as a solvent. The product (IC-1) is then preferably obtained by direct crystallization from the concentrate, eg the toluene reaction mixture. Also preferably and suitable in accordance with the present invention is the change of solvent to, for example, methanol or ethanol (see above) for the crystallization of the products.
[0115] According to an embodiment, seed crystals are added to the crystallization stage.
[0116] When using the crystallization step, in particular when performing process steps (iv), the formation of unwanted symmetric triazole (ICs-1), as described above, can be reduced to equal to or less than 10%, more preferably equal to or less than 8%, more preferably equal to or less than 5%, even more preferably equal to or less than 2%.
[0117] Preferably, the ratio of the isolated compound (IC-1) to the symmetric triazole (ICs-1) is at least 20:1, preferably at least 30:1, more preferably 50 :1, more specifically, of 70:1. In particular, the ratio of the compound (IC-1) to (ICs-1) is at least 30:1.
[0118] Also other methods to further react the oxiranes (IB) to the final products (IC) can be carried out.
[0119] For example, the epoxide ring of compounds (IB) can be cleaved by reaction with alcohols R2OH, preferably under acidic conditions, to result in compounds IX:

[0120] Then, the resulting compounds IX are reacted with halogenating agents or sulphonating agents such as PBr3, mesyl chloride PCI3, tosyl chloride or thionyl chloride, to obtain compounds X, where LG ' is a nucleophilically substitutable leaving group such as halogen, alkylsulfonyl, alkylsulfonyloxy and arylsulfonyloxy, preferably chlorine, bromine or iodine, especially preferably bromine or alkylsulfonyl. Then, compounds X are reacted with 1H-1,2,4-triazole to obtain compounds IC, as known in the prior art and/or described above:

[0121] To obtain compounds of Formula IC, in which the alcohol group is derivatized to an ether group, to result in compounds of Formula IC-2, in which the variables are as defined above, the following step can be performed: (vii) derivatizing the compound of Formula (IC-1), as defined in step (iv) under basic conditions with R2-LG, wherein LG is a nucleophilically substitutable leaving group; to result in compounds (IC-2).
[0122] LG represents a nucleophilically substitutable leaving group such as halogen, alkylsulfonyl, alkylsulfonyloxy and arylsulfonyloxy, preferably chlorine, bromine or iodine, especially preferably bromine. Preferably a base is used in step (iii), such as, for example, NaH.
[0123] Suitable solvents, for example, are ethers, especially cyclic ethers. Possible solvents, for example, are tetrahydrofuran (THF), 2-methyl-tetrahydrofuran (2-Me-THF), diethyl ether, TBME (methyl tert-butyl ether), CPME (cyclopentyl methyl ether) , DME (1,2-dimethoxyethane) and 1,4-dioxane. Other solvents which may be suitable, for example, are diisopropyl ether, di-n-butyl ether and/or diglyme. Often the use of THF or 2-methyl-THF is especially suitable. Furthermore, it may also be suitable to use combinations of two or more different solvents, such as, for example, any combination of one of the above mentioned solvents or any of the listed ethers with the aliphatic hydrocarbons, such as n-hexane, heptane or aromatic hydrocarbons such as toluene or xylenes.
[0124] The person skilled in the art is familiar with the reaction in step (v) and can vary the reaction conditions in a manner analogous to known syntheses.
[0125] In one embodiment, a triazole compound of Formula IC is obtained by
(iv-a) reacting an oxirane of Formula (IB) as defined herein; with the 1H-1,2,4-triazole and an inorganic base, wherein less than one equivalent of said base is used per one equivalent of compound (IB), resulting in compounds of Formula (IC).
[0126] To obtain the compounds of Formula (IC-2), in which the alcohol group is derivatized (resulting in "OR2", see above), the above derivatization step can be performed.
[0127] In the definitions of the variables presented above, the collective terms that are used, in general, representative for the substituents in question. The term "Cn-Cm" indicates the number of carbon atoms possible in each case in the substituent or substituent moiety in question.
[0128] The term "halogen" refers to fluorine, chlorine, bromine and iodine.
[0129] The term "C1-C6 alkyl" refers to a straight or branched chain saturated hydrocarbon group containing 1 to 6 carbon atoms, for example, methyl, ethyl, propyl, 1-methylethyl, butyl, 1- methylpropyl, 2-methylpropyl, 1,1-dimethylethyl, pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, hexyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethyl-butyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3, 3-di-methylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-1-methylpropyl and 1-ethyl-2-methylpropyl. Similarly, the term "C2-C4 alkyl" refers to a straight or branched chain alkyl group containing 2 to 4 carbon atoms, such as ethyl, propyl (n-propyl), 1-methylethyl (isopropyl) , butyl, 1-methylpropyl (sec-butyl), 2-methylpropyl (isobutyl), 1,1-dimethylethyl (tert-butyl).
[0130] The term "C3-C8 cycloalkyl" refers to saturated monocyclic hydrocarbon radicals containing 3 to 8 carbon ring members, such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloepyl or cyclooctyl.
[0131] The meanings and meanings preferably described herein for the variables R1, R2, R4, X, R' and R'' apply to all compounds and precursors of compounds and by-products in any of the process steps detailed in the present.
[0132] R4 according to the present invention is independently selected from F and Cl. Specifically, the following compounds from IC.1 to IC.7 can advantageously be prepared using the process according to the present invention:- compound IC.1: 2-[4-(4-chlorophenoxy)-2-(trifluoromethyl) phenyl]-1-(1,2,4-triazol-1-yl)propan-2-ol;- compound IC.2: 1-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-1 -cyclopropyl-2-(1,2,4-triazol-1-yl)ethanol;- compound IC.3: 2-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-3-methyl-1 -(1,2,4-triazol-1-yl)butan-2-ol;- compound IC.4: 2-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-1-(1, 2,4-triazol-1-yl)butan-2-ol; - compound IC.5: 1-[2-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-methoxy-propyl]-1,2,4-triazole; - compound IC.6: 1 -[2-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-cyclopropyl-2-methoxy-ethyl]-1,2,4-triazole;- compound IC.7: 1-[2 -[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-methoxy-butyl]1,2,4-triazole;
[0133] The compounds (IC) comprise the chiral centers and that, in general, are obtained in the form of racemates. The R and S enantiomers of the compounds can be separated and isolated in pure form with methods known to the person skilled in the art, for example using chiral HPLC. Furthermore, components that may be present in different crystal modifications, which may differ in biological activity. The compounds can be present in a variety of crystal modifications. They are likewise provided by the present invention. EXAMPLES
[0134] The following examples further illustrate the present invention and are not limited to the present invention in any way. EXAMPLE 1-1- Synthesis of [4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-cyclopropyl-methanone STEP 1 -1A AND 1-1B
[0135] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 94.0 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity , 0.38 mol) and 150 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 60 minutes, this solution was added to a mixture of 150 g of toluene, 61.0 g of cyclopropancarbonyl chloride (0.57 mol), and 1.1 g of copper(I) chloride (0.01 mol) in a 1,000 mL four-neck flask equipped with a blade stirrer of Teflon, reflux condenser and an addition funnel, keeping the temperature between 38 and 42°C. After half of the Grignard solution was metered in, another 1.1 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 2 h at 40°C. 300 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with a mixture of 250 g of water and 60 g of 25% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave a dark brown product. This was dissolved in 220 g of DMF, and transferred to a 1 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel. 68 g of potassium carbonate (0.49 mol) and a mixture of 54 g of 4-chlorophenol (0.42 mol) and 20 g of DMF were added, at room temperature, the vessel was heated to 130°C and held at this temperature for 2h. The mixture was cooled to 120°C and the pressure was slowly reduced to 100 mbar. Solvent distillation was continued under these conditions until none of the condensate was formed. The vessel was cooled to 25°C, 200 mL of toluene, followed by 500 g of water were added with stirring. The phases were separated and the aqueous phase was extracted with 200 ml of toluene. The combined organic phases were washed with 200 g of sodium hydroxide solution (5%) and the lower aqueous phase was separated. The organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 126.4 g of a slightly brown product (purity: 91.5%, 0.34 mol, 88.6% of the theoretical yield).EXAMPLE 1-2- Synthesis of [4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-cyclopropyl-methanone STEP 1 -2A- Synthesis of cyclopropyl-[4-fluoro-2-(trifluoromethyl) phenyl]methanone
[0136] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 94.0 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity , 0.38 mol) and 150 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 60 min, this solution was added to a mixture of 150 g of toluene, 61.0 g of cyclopropancarbonyl chloride (0.57 mol), and 1.1 g of copper(I) chloride (0.01 mol) in a 1,000 mL four-neck flask equipped with a blade stirrer of Teflon, reflux condenser and a dropping funnel, keeping the temperature between 38 and 42°C. After half of the Grignard solution was metered in, another 1.1 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 2 h at 40°C. 300 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with a mixture of 250 g of water and 60 g of 25% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 89.9 g of a dark brown product (purity: 92.4%, 0.36 mol , 93.4% yield). STEP 1-2B- Synthesis of [4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-cyclopropyl-methanone.
[0137] A 4 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser, and a dropping funnel was charged with 91 g of [4-fluoro-2-(trifluoromethyl)phenyl]-cyclopropyl- methanone (97% purity, 0.38 mol), 200 g DMF, and 68 g potassium carbonate (0.49 mol). A mixture of 54 g of 4-chlorophenol (0.42 mol) and 20 g of DMF was added, at room temperature, the vessel was heated to 130°C and held at this temperature for 2h. The vessel was cooled to 25°C, 400 mL of MTBE followed by 750 g of water were added with stirring. The phases were separated and the aqueous phase was extracted with 300 ml of MTBE. The combined organic phases were washed with 200 ml of sodium hydroxide solution (5%) and the lower aqueous phase was separated. The organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 130.4 g of a slightly brown product (purity: 94.0%, 0.36 mol, 94.6% of the theoretical yield).EXAMPLE 2-1- Synthesis of 1-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-one. STEPS 2-1A AND 2-1B
[0138] A 2 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser, and a dropping funnel was charged with 270.0 g of 2-bromo-5-fluoro-benzotrifluoride (purity 99 %, 1.1mol) and 1000 ml of toluene. A solution of isopropylmagnesium chloride in THF (2M, 700 g, 1.44 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 30 minutes, this solution was added to a mixture of 1000 ml of toluene, 167.0 g of isobutyric acid chloride (1.57 mol), and 3.5 g of copper(I) chloride (0.035 mol) in a 4 L four-neck flask equipped with a bladed stirrer. Teflon, reflux condenser and a dropping funnel, keeping the temperature between 38 and 42°C. After half of the Grignard solution was metered in another 3.5 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 1 h at 40°C. 500 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with 500 g of a 10% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave a brown product. This was dissolved in 700 g of DMF, and transferred to a 4 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel. 200 g of potassium carbonate (1.45 mol) and a mixture of 160 g of 4-chlorophenol (0.42 mol) and 60 g of DMF were added at room temperature, the vessel was heated to 130°C and held at this temperature for 1.5 h. The vessel was cooled to 25°C, 1000 mL of MTBE followed by 1000 g of water were added under stirring. The phases were separated and the aqueous phase was extracted with 500 ml of MTBE. The combined organic phases were washed with 500 g of sodium hydroxide solution (5%) and the lower aqueous phase was separated. The organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 339.4 g of a slightly brown product (purity: 87.3%, 0.86 mol, 78.8% of the theoretical yield).EXAMPLE 2-2- Synthesis of 1-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-oneSTEP 2-2A1- Synthesis of 1-[4- fluoro-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-one
[0139] A 1 m3 vessel equipped with a 3-stage 2-blade stirrer was charged with 100 kg of 2-bromo-5-fluoro-benzotrifluoride (99% purity, 407mol) and 150 kg of toluene. A solution of isopropylmagnesium chloride in THF (2M, 272 kg, 530 mol) was added maintaining the temperature between 25 and 33°C. After stirring for 60 minutes, this solution was transferred to a 1 m3 IBC. The vessel was charged with 150 kg of toluene, 65 kg of isobutyric acid chloride (611 mol), and 1.2 kg of copper(I) chloride (12.2 mol), and the Grignard solution in IBC was added. keeping the temperature between 25 and 40°C. After half of the Grignard solution was dosed, another 1.2 kg of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 90 min at 40°C. The vessel was cooled to 10°C and 200 kg of water having a temperature of 5°C was added, the solution was stirred for 10 min and the phases were allowed to separate for 1 h. The lower aqueous phase was separated and the organic phase was washed with a mixture of 100 kg of water and 50 kg of 25% ammonia solution. After phase separation, the organic phase was transferred to an industrial bulk container (IBC). Three identical batches were run, the organic phases from all four batches were combined and solvents and other volatile materials were removed by distillation at 10 mbar and 40°C to leave 393 kg of a brown product (purity: 86.7% , 1,455 mol, 89.3% of theoretical yield). STEP 2-2A2- Synthesis of 1-[4-fluoro-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-one
[0140] A 1,000 mL four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 200.0 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity , 0.81 mol) and 300 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 544 g, 1.12 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 60 min, this solution was added to a mixture of 300 g of toluene, 165.7 g of isobutyric acid chloride (1.59 mol), and 0.243 g of copper(I) chloride (0.0025 mol) in a 2,000 mL four-neck flask equipped with a Teflon blade stirrer , reflux condenser and a dropping funnel, maintaining the temperature between 38 and 42°C. After half of the Grignard solution was metered in, another 0.243 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 2 h at 40°C. 500 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with 500 g of a 5% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 194.0 g of a dark brown product (purity: 86.2%, 0.71 mol , 87.6% of theoretical yield). STEP 2-2B1- Synthesis of 1-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-one
[0141] A 1 m3 vessel equipped with a 3-stage 2-blade stirrer was loaded with 100 kg of potassium carbonate (723.6 mol) and 128 kg of DMF. Technical 1-[4-fluoro-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-one (131 kg, 86.7%, 485 mol) was added at room temperature, followed by 132 kg of a solution of 4-chlorophenol in DMF (56.7%, 581.9 mol, 57.16 kg of DMF). The feed lines were rinsed with a total of 15 kg of DMF. The contents of the vessel were heated to 130°C and held at this temperature for 3.5 h. The vessel was cooled to 25°C and a vacuum of 10 mbar was applied. The temperature was slowly raised to 100°C to distil most of the DMF and other volatiles. When no other condensate had formed, the vessel was purged with nitrogen and 400 kg of toluene was added, followed by 400 kg of water. After 30 minutes the stirrer was stopped and after an additional 60 minutes the lower aqueous phase was separated. The remaining organic phase was washed with 115 kg of sodium hydroxide solution (5%) and the lower aqueous phase was separated. The organic phase was discharged to an IBC to obtain 580 kg of a solution containing 27.8% of the desired product (161.2 kg, 470 mol, 97% of theoretical yield). STEP 2-2B2- Synthesis of 1-[ 4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-2-methyl-propan-1-one
[0142] A 100 mL four-neck flask equipped with a Teflon blade stirrer, Dean-Stark trap, and a dropping funnel was charged with 5 g of 1-[4-fluoro-2-(trifluoromethyl)phenyl ]-2-methyl-propan-1-one (84.7% purity, 0.0181 mol), 10 g of o-xylene, 3.49 g of 4-chlorophenol (0.03 mol), and 1, 52 g of potassium hydroxide solution (50%, 0.03 mol), and was heated to reflux (151°C) for 5 h. The vessel was cooled to 25°C, 20 mL of o-xylene and 20 g of water were added under stirring and acidified to pH 4 with 20% hydrochloric acid. The phases were separated and the aqueous phase was extracted twice with 20 ml of o-xylene. The combined aqueous phases were extracted with 20 ml of o-xylene. The combined organic phases were transferred to a rotary evaporator and the solvent removed at 40°C and 10 mbar to leave 7.5 g of a slightly brown product (purity: 78.5%, 0.02 mol, 95.0% of theoretical yield). EXAMPLE 3-1- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone STEPS 3-1A AND 3-1B
[0143] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 94.0 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity , 0.38 mol) and 150 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 30 minutes, this solution was added to a mixture of 150 g of toluene, 46.0 g of acetyl chloride (0.57 mol), and 1.1 g copper(I) chloride (0.01 mol) in a 1,000 mL four-neck flask equipped with a bladed stirrer. Teflon, a reflux condenser, and a dropping funnel, keeping the temperature between 38 and 42°C. After half of the Grignard solution was metered in, another 1.1 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 1 h at 40°C. 300 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with a mixture of 250 g of water and 60 g of 25% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave a brown product. This was dissolved in 220 g of DMF, and transferred to a 2 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel. 68.0 g of potassium carbonate (0.49 mol) and a mixture of 54.0 g of 4-chlorophenol (0.42 mol) and 14 g of DMF were added at room temperature, the vessel was heated to 130°C. ° C and kept at this temperature for 2h. The vessel was cooled to 25°C, 750 g of water, followed by 400 mL of toluene were added with stirring. The phases have been separated. The organic phase was washed with 200 g of sodium hydroxide solution (5%) and the lower aqueous phase was separated. The organic phase was transferred to a rotary evaporator and the solvent was removed at 60°C and 5 mbar to leave 109.7 g of a slightly brown product (purity: 83.8%, 0.29 mol, 76.3% of the theoretical yield).EXAMPLE 3-2- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone STEP 3-2A1- Synthesis of 4-fluoro-2-trifluoromethyl-acetophenone
[0144] A 1 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser, and a dropping funnel was charged with 96.0 g of 2-bromo-5-fluoro-benzotrifluoride (95 purity %, 0.38 mol) and 150 g of MTBE. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 30 minutes, this solution was added to a mixture of 150 g of MTBE, 45.0 g acetyl chloride (0.56 mol), and 1.1 g copper(I) chloride (0.01 mol) in a 2 mL double-walled glass reactor equipped with a stirrer. 3 levels of 2 blades, reflux condenser and a dropping funnel keeping the temperature between 38 and 42°C. After half of the Grignard solution was dosed, another 1.1 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 1 h at 40°C. 200 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with a mixture of 250 g of water and 50 g of 25% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 78.5 g of a dark brown oil (purity: 95.0%, 0.36 mol , 96.4% of theoretical yield). STEP 3-2A2- Synthesis of 4-chloro-2-trifluoromethyl-acetophenone
[0145] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 94.0 g of 2-bromo-5-chloro-benzotrifluoride (96% purity , 0.35mol) and 150 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 60 minutes, this solution was added to a mixture of 150 g of toluene, 61.0 g of acetyl chloride (0.57 mol), and 0.5 g of copper(I) chloride (0.005 mol) in a 1 L four-neck flask equipped with a bladed stirrer. Teflon, a reflux condenser, and a dropping funnel maintaining the temperature between 38 and 42°C. After half of the Grignard solution was metered in, another 0.5 g of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 2.5 h at 40°C. 300 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with a mixture of 250 g of water and 60 g of 25% ammonia solution. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 94.0 g of a dark brown product (purity: 79.3%, 0.30 mol , 86.2% of theoretical yield). STEP 3-2A3- Synthesis of 4-fluoro-2-trifluoromethyl-acetophenone
[0146] A 2.5 m3 vessel equipped with a 3-stage 2-blade stirrer was charged with 250 kg of 2-bromo-5-fluoro-benzotrifluoride (99% purity, 1,019 mol) and 375 kg of toluene. A solution of isopropylmagnesium chloride in THF (2M, 681 kg, 1,397 mol) was added maintaining the temperature between 25 and 33°C. After stirring for 45 minutes, this solution was transferred to the 1 m3 IBC. The vessel was charged with 375 kg of toluene, 120 kg of acetyl chloride (1,498 mol), and 3.0 kg of copper(I) chloride (30.3mol), and the Grignard solution in IBCs was added maintaining the temperature between 25 and 40°C. After half of the Grignard solution was dosed, another 3.0 kg of copper(I) chloride was added. When the Grignard addition was complete, the mixture was stirred for 90 min at 40°C. The vessel was cooled to 10°C and 500 kg of water pre-cooled to 10°C was added, the solution was stirred for 10 min. and the phases were allowed to separate for 1 h. The lower aqueous phase was separated and the organic phase was washed with a mixture of 250 kg of water and 25 kg of 25% ammonia solution. After phase separation, the organic phase was transferred to the IBCs and provided 1,677 kg of a slightly brown solution containing 10.4% of the desired product (846 mol, 82.8% of theoretical yield). STEP 3-2A4- Synthesis of 4-fluoro-2-trifluoromethyl-acetophenone
[0147] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 94.0 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity , 0.38 mol) and 150 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 30 minutes, this solution was added to a mixture of 150 g of toluene, 46.0 g of acetyl chloride (0.57 mol), and 0.76 g of copper(I) chloride (0.0077 mol) in a 1,000 mL four-neck flask equipped with a blade stirrer of Teflon, a reflux condenser, and a dropping funnel keeping the temperature between 38 and 42°C. 300 g of water was added, the mixture was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with 300 g of water. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 81.4 g of a brown oil (purity: 81.6%, 0.32 mol, 84.1% of theoretical yield). The condensate contained 3.9 g of product (5.0%) additional yield. STEP 3-2A5- Synthesis of 4-fluoro-2-trifluoromethyl-acetophenone
[0148] A 1 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser, and a dropping funnel was charged with 94.0 g of 2-bromo-5-fluoro-benzotrifluoride (purity 99 %, 0.38 mol) and 150 g of toluene. A solution of isopropylmagnesium chloride in THF (2M, 243 g, 0.5 mol) was added maintaining the temperature between 25 and 30°C. After stirring for 30 minutes, this solution was added to a mixture of 150 g of toluene, 6.0 g of acetyl chloride (0.076 mol), and 0.76 g of copper(I) chloride (0.0077 mol) in a 1,000 mL four-neck flask equipped with a Teflon blade stirrer , a reflux condenser, and a dropping funnel maintaining the temperature between 38 and 42°C. Parallel to this dosage, 40 g of acetyl chloride (0.51 mol) were added. When the addition was complete, the mixture was stirred for 1 h at 40°C. 300 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with 300 g of water. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 81.8 g of a brown oil (purity: 80.5%, 0.32 mol, 83.4% of theoretical yield). The condensate contained 3.3 g of product (4.2% yield). STEP 3-2B1- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0149] A 2.5 m3 vessel equipped with a 3-stage 2-blade stirrer was loaded with 250 kg of potassium carbonate (1,809 mol) and 460 kg of DMF. Technical 4-fluoro-2-trifluoromethyl-acetophenone (260 kg, 77.7%, 979 mol) was added at room temperature, followed by 310 kg of a solution of 4-chlorophenol in DMF (57%, 1375 mol, 133 .3 kg of DMF). The feed lines were rinsed with a total of 25 kg of DMF. The contents of the vessel were heated to 130°C and held at this temperature for 3.5 h. The vessel was cooled to 25°C and a vacuum of 10 mbar was applied. The temperature was slowly raised to 100°C to distil most of the DMF and other volatiles. When no condensate had formed, the vessel was purged with nitrogen and 1000 kg of toluene was added, followed by 1000 kg of water. After 30 minutes the stirrer was stopped and after an additional 60 minutes the lower aqueous phase was separated. The remaining organic phase was washed with 350 kg of sodium hydroxide solution (5%) and the lower aqueous phase was separated. The organic phase was discharged into the IBCs to obtain 1,381 kg of a solution containing 22.0% of the desired product (304.2 kg, 967 mol, 98.7% of theoretical yield). STEP 3-2B2- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0150] A 500 L four-neck flask equipped with a Teflon blade stirrer, Dean-Stark trap, and a dropping funnel was charged with 100 g of 4-fluoro-2-trifluoromethyl-acetophenone (purity 78 %, 0.38 mol), 100 g of o-xylene, 54 g of 4-chlorophenol (0.42 mol), and 78.5 g of potassium carbonate (0.57 mol). The vessel was refluxed for 5 h, removing 4.8 g of water. The vessel was cooled to 25°C, 250 mL of o-xylene and 320 g of water were added with stirring. The phases were separated and the aqueous phase was extracted with 100 ml of o-xylene. The combined organic phases were washed with 100g of sodium hydroxide solution (10%) and the lower aqueous phase was separated. The organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 137.2 g of a slightly brown product (purity: 82.6%, 0.36 mol, 95.2% of the theoretical yield). STEP 3-2B3- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0151] A 100 ml pressure vessel (Premex) equipped with a mechanical stirrer was charged with 20 g of 4-fluoro-2-trifluoromethyl-acetophenone (78% purity, 0.08 mol), 20 g of toluene, 13.6 g of 4-chlorophenol (0.11 mol), and 6.4 g potassium hydroxide (0.11 mol). The vessel was sealed and heated to 153°C for 5 h. After cooling and depressurizing, the reaction mixture was transferred to a separating funnel containing 20 g of toluene and 40 g of water and acidified to pH 4 with 20% hydrochloric acid. The aqueous phase was separated and the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 28.5 g of a slightly brown product (purity: 73.3%, 0.07 mol , 87.7% of theoretical yield). STEP 3-2B4- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0152] A 100 mL four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 5.7 g of 4-chloro-2-trifluoromethyl-acetophenone (81.0% of purity, 20.7 mmol), 10 g of N-methyl pyrrolidone, 3.2 g of 4-chlorophenol (24.9 mmol), and 3.3 g of sodium carbonate (31.1 mmol), and was heated to 180°C for 17 h. The vessel was cooled to 25°C and the solvent removed on a rotary evaporator at 60°C / 8 mbar. 50 ml of toluene and 40 g of water were added under stirring, the phases were separated and the organic phase was washed with water 10g. The combined aqueous phases were extracted with 10 ml of toluene. The combined organic phases were transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 8.1 g of a slightly brown product (purity: 66.7%, 17.2 mmol, 82.8% of theoretical yield). STEP 3-2B5- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0153] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 9.0 g of 4-chloro-2-trifluoromethyl-acetophenone (78.8% of purity, 31.9 mmol), 15 g of dimethyl imidazolidinone, 5.3 g of 4-chlorophenol (41.2 mmol), and 7.4 g of potassium carbonate (53.5 mmol), and was heated at 170°C for 6 h. The vessel was cooled to 25°C and 40 mL of toluene and 35 g of water were added under stirring, the phases were separated and the organic phase was washed with 20 g of 5% sodium hydroxide solution. The phases were separated, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 16.0 g of a brownish product (purity: 50.2%, 25.5 mmol, 80 1% of theoretical yield). STEP 3-2B6 - Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0154] A 20 mL microwave vial equipped with a magnetic stir bar was charged with 6.0 g of 4-fluoro-2-trifluoromethyl-acetophenone (78.0% purity, 22.7 mmol), and 4.8 g of sodium 4-chloro phenolate (31.8 mmol), and was heated in a microwave oven at 160°C for 3h. The vessel was cooled to 25°C, and rinsed with 30 mL of toluene and 20 g of 10% hydrochloric acid into a separatory funnel. The phases were separated, the aqueous phase was extracted with 6 ml of toluene, the combined organic phases were transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 8.7 g of a brownish product (purity : 75.52%, 20.9 mmol, 91.9% of theoretical yield). STEP 3-2B7- Synthesis of 4-(4-chlorophenyloxy)-2-trifluoromethyl-acetophenone
[0155] A 20 mL microwave vial equipped with a magnetic stir bar was charged with 6.0 g of 4-fluoro-2-trifluoromethyl-acetophenone (78.0% purity, 22.7 mmol), 6 g of toluene, and 5.3 g of potassium 4-chloro phenolate (31.8 mmol), and was heated in a microwave oven at 160°C for 3 h. The vessel was cooled to 25°C, and rinsed with 20g of toluene and 20g of 10% hydrochloric acid for a separating ring. The phases were separated, the aqueous phase was extracted with 5 ml of toluene, the combined organic phases were transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 9.3 g of a brownish product (purity : 74.0%, 21.9 mmol, 96.3% of theoretical yield). EXAMPLE 4- Preparation of 2-acyl-5-halo-benzotrifluorides using Mg
EXAMPLE 4A- 4-fluoro-2-(trifluoromethyl)acetophenone
[0156] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 1.10 g magnesium metal chips (45 mmol) and 50 g THF. 1 g of a 2M solution of isopropyl magnesium chloride was added for activation. 10 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity, 41 mmol) was added within 60 min, the temperature increased to 52°C. After stirring for 60 min, this Grignard solution was decanted to starting from the remaining metal, was transferred to a dropping funnel, and added within 60 min to a mixture of 50g of toluene, 4.8g of acetyl chloride (61 mmol) and 0.08g of copper(I) chloride (0.8 mmol) in a 500 mL four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel, maintaining the temperature between 38 and 42°C. When the Grignard addition is complete , the mixture was stirred for 1 h at 40°C. 50 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with 25g water. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 9.2 g of a dark brown product (purity: 59.5%, 27 mmol, 65 % of theoretical yield). EXAMPLE 4B-4-Fluoro-2-(trifluoromethyl)acetophenone
[0157] A 500 L four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel was charged with 0.90 g of magnesium metal chips (37 mmol) and 40 g of THF. 1 g of a 2M solution of isopropyl magnesium chloride was added for activation. 10 g of 2-bromo-5-fluoro-benzotrifluoride (99% purity, 41 mmol) was added within 60 min, the temperature increased to 50°C. After stirring for 60 min, all the magnesium had disappeared and the Grignard's solution was transferred to a dropping funnel, and added within 60 min, to a mixture of 40 g of toluene, 4.0 g of acetyl chloride (51 mmol), and 0.08 g of copper(I) chloride ) (0.8 mmol) in a 500 mL four-neck flask equipped with a Teflon blade stirrer, reflux condenser and a dropping funnel, maintaining the temperature between 38 and 42°C. When the Grignard addition was Upon completion, the mixture was stirred for 1 h at 40°C. 30 g of water was added, the solution was stirred for 10 min and the phases were allowed to separate. The organic phase was washed with 25 g of water. After phase separation, the organic phase was transferred to a rotary evaporator and the solvent was removed at 40°C and 10 mbar to leave 9.2 g of a dark brown product (purity: 60.9%, 27 mmol, 74 % of theoretical yield based on Mg).

权利要求:
Claims (10)
[0001]
1. PROCESS FOR THE PREPARATION OF KETONE COMPOUNDS (IA)
[0002]
2. Process according to claim 1, characterized in that the catalyst Cu(I) is Cu(I)Cl.
[0003]
3. PROCESS, according to any one of claims 1 to 2, characterized in that R’ is isopropyl.
[0004]
4. Process according to any one of claims 1 to 3, characterized in that Hal is Br or Cl, in particular Br.
[0005]
5. PROCESS, according to any one of claims 1 to 4, characterized in that X is F.
[0006]
6. PROCESS, according to any one of claims 1 to 5, characterized in that R1 is selected from CH3, CH(CH3)2 and cyclopropyl.
[0007]
7. PROCESS according to any one of claims 1 to 6, characterized in that R4 is Cl.
[0008]
8. PROCESS according to any one of claims 1 to 7, characterized in that during the process step (i) the compound(s) of Grignard Ga and/or Gb
[0009]
9. PROCESS FOR THE PREPARATION OF TRIAZOLE COMPOUNDS OF FORMULA (IC)
[0010]
10. PROCESS according to claim 9, characterized in that the reaction with oxirane (IB) is carried out with a trimethylsulf(ox)onium halide ((CH3)3S+(O)Hal) (VII), in which the Hal is the halogen, or trimethylsulfonium methylsulfate of Formula (VIII) (CH3)3S+CH3SO4-.

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公开号 | 公开日 | 专利标题

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BR112016014018B1|2021-08-24|PROCESS FOR THE PREPARATION OF KETONE COMPOUNDS |, AND PROCESS FOR THE PREPARATION OF FORMULA TRIAZOLE COMPOUNDS

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EP3310748B1|2019-05-29|Process for the preparation of substituted phenyl ketones

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法律状态:
2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-07-27| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-08-24| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/12/2014, OBSERVADAS AS CONDICOES LEGAIS. |

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2021-10-26| B16C| Correction of notification of the grant [chapter 16.3 patent gazette]|Free format text: REFERENTE AO DESPACHO 16.1 PUBLICADO NA RPI 2642, QUANTO AO TITULO |

优先权:

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