JP2013155156A - Compound - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a difluorobenzyl halide derivative useful as a production intermediate for chemicals etc., such as pharmaceuticals, agrochemicals and liquid crystal materials, and a method for efficiently producing the difluorobenzyl halide derivative.SOLUTION: There is provided a compound expressed by general formula (I) (in the formula, Ris a hydrogen atom, chlorine atom, bromine atom, iodine atom or 1-15C alkyl; A, Aand Aare each independently trans-1,4-cyclohexylene wherein one or more ring-constituting methylene groups may be substituted with an oxygen atom or sulfur atom, or 1,4-phenylene wherein one or more hydrogen atoms on a ring may be substituted with a fluorine atom; Z, Zand Zare each independently a single bond, -CHCH-, -(CH)-, -CHO- or -OCH-; l, m and n are each independently 0 or 1; and Xis a chlorine atom, bromine atom or iodine atom).

Description

  The present invention relates to a difluorobenzyl halide derivative useful as a production intermediate for chemicals such as pharmaceuticals, agricultural chemicals, and liquid crystal materials, and a method for producing the same.

  A compound having a difluoromethyl ether skeleton is extremely useful as a physiologically active substance serving as an active ingredient such as pharmaceuticals and agricultural chemicals, and a functional material such as a liquid crystal material because of its unique electronic configuration due to the interaction between fluorine atoms and oxygen atoms. In particular, a skeleton in which a fluorine atom is introduced into an aromatic ring adjacent to a difluoromethyl ether skeleton represented by 1- (difluoro (p-tolyloxy) methyl) -2,3-difluoro-4-methylbenzene (the following formula (A ), A compound having a skeleton (A)) below is particularly useful as a constituent member of a liquid crystal material. For example, inclusion of a compound having a skeleton (A) in a liquid crystal material having positive dielectric anisotropy is effective in improving the absolute value of dielectric anisotropy.

（式中、Ｐ^１及びＰ^２は、任意の基を表す。）

(Wherein, ^{P 1} and ^{P 2} represents any group.)

  As a method for producing a compound having a skeleton (A), there was a method of producing via a benzoate ester as shown below (see, for example, Patent Document 1). In the production method, the structure of the final target product is determined according to the structure of the alcohol used for esterification. That is, for each structure of the target compound, alcohols corresponding to each structure are required. For this reason, when manufacturing the compound which has several frame | skeleton (A), it is necessary to prepare many manufacturing intermediates, and there exist problems, such as a fall of manufacturing efficiency and the effort of storage.

  On the other hand, 4-halogenodifluorobenzyl bromide derivatives and production methods thereof are known (see Patent Documents 2 and 3 and Non-Patent Document 1). However, a method for efficiently producing a compound having a skeleton (A) from a 4-halogenodifluorobenzyl bromide derivative has not been known so far.

JP 2001-139511 A JP 61-180727 A German Patent Invention No. 1518857

M.M. Yoshida, Y. et al. Morinaga, M .; Ueda, N .; Kamigata and M.K. Iyoda, Chemistry Letters, 227-230, 1992.

  An object of the present invention is to provide a difluorobenzyl halide derivative useful as an intermediate for producing a compound having a skeleton (A), and a method for efficiently producing the difluorobenzyl halide derivative.

  As a result of intensive studies on various difluorobenzyl halide derivatives in order to solve the above-mentioned problems, the present inventors have succeeded in producing a difluorobenzyl halide derivative having a substituent at the 4-position, thereby completing the present invention. .

  That is, the present invention relates to the general formula (I)

(Wherein R ¹ represents a hydrogen atom, a chlorine atom, a bromine atom, an iodine atom, or an alkyl group having 1 to 15 carbon atoms, and one or more methylene groups not adjacent to each other in the alkyl group are an oxygen atom, A sulfur atom or -CH = CH- may be substituted, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom;
A ¹ , A ² and A ³ are each independently a trans-1,4-cyclohexylene group in which one or more methylene groups constituting the ring may be substituted by an oxygen atom or a sulfur atom, or on the ring Represents a 1,4-phenylene group in which one or more hydrogen atoms may be substituted by fluorine atoms,
Z ¹ , Z ² and Z ³ each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —CH ₂ O— or —OCH ₂ —,
l, m and n each independently represents 0 or 1,
X ² represents a chlorine atom, a bromine atom or an iodine atom. And a method for producing the compound.

  The compound of the present invention is a difluorobenzyl halide derivative in which the 1-position of a benzene ring having fluorine substitution is substituted with a difluorohalomethyl group, and is particularly useful as an intermediate for producing a compound having a skeleton (A).

<Compound represented by formula (I)>
The compound of the present invention is a compound represented by the general formula (I).

In general formula (I), R ¹ represents a hydrogen atom, a chlorine atom, a bromine atom, an iodine atom, or an alkyl group having 1 to 15 carbon atoms. One or more methylene groups that are not adjacent to each other in the alkyl group may be substituted with an oxygen atom, a sulfur atom, or —CH═CH—. In addition, any hydrogen atom in the alkyl group may be substituted with a fluorine atom. The alkyl group may be a branched group or a linear group. In the present invention, when R ¹ is an alkyl group having 1 to 15 carbon atoms, one or more methylene groups that are not adjacent to each other may be substituted with an oxygen atom, a sulfur atom, or —CH═CH—, And it is preferable that it is a C1-C15 alkyl group by which arbitrary hydrogen atoms may be substituted by the fluorine atom, a C1-C8 alkyl group, a C1-C8 alkoxy group, carbon It is preferably an alkenyl group having 2 to 8 atoms or an alkenyloxy group having 2 to 8 carbon atoms, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or 2 to 2 carbon atoms. It is more preferably an alkenyl group having 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms, and further preferably an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms.

In the present invention, R ¹ represents a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or It is preferably an alkenyloxy group having 2 to 8 carbon atoms, more preferably a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms, More preferably, they are a chlorine atom, a bromine atom, an iodine atom, or an alkyl group having 1 to 5 carbon atoms.

In the general formula (I), X ² represents a halogen atom other than a fluorine atom, i.e., chlorine atom, bromine atom or iodine atom. In the present invention, X ² is preferably a bromine atom or an iodine atom, and more preferably a bromine atom.

In general formula (I), Z ¹ , Z ² and Z ³ each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —CH ₂ O— or —OCH ₂ —. Represent. In the present invention, Z ¹ , Z ² and Z ³ are each independently preferably a single bond, —CH ₂ CH ₂ —, —CH ₂ O— or —OCH ₂ —, and more preferably a single bond.

In general formula (I), A ¹ , A ^2, and A ³ are each independently trans-1,4-in which one or more methylene groups constituting the ring may be substituted with an oxygen atom or a sulfur atom. It represents a cyclohexylene group or a 1,4-phenylene group in which one or more hydrogen atoms on the ring may be substituted with a fluorine atom. In the present invention, A ¹ , A ² and A ³ are each independently preferably any one of the following divalent groups having the following five types of cyclic structures. Hereinafter, these divalent groups having five kinds of cyclic structures may be collectively referred to as “divalent ring structure-containing group B”.

  In general formula (I), l, m, and n each independently represent 0 or 1. In the present invention, it is preferable that all of l, m and n are 0, or two of l, m and n are 0 and 1 is 1.

The compound of the present invention is a difluorobenzyl halide derivative having a difluorohalomethyl group represented by “—CF ₂ X ² ” (group in which the hydrogen atom of the difluoromethyl group is substituted with a halogen atom) at the 1-position of the benzene ring. It is. A compound having a skeleton (A) can be synthesized by reacting the difluorohalomethyl group with a compound having a phenolic hydroxyl group or an alcoholic hydroxyl group in the presence of a base. That is, the compound of the present invention is useful as a synthetic intermediate for a compound having a skeleton (A).

<Method for Producing Compound Represented by General Formula (I)>
The compound represented by the general formula (I) can be synthesized using a known compound as a starting material and appropriately combining known organic synthesis reactions. In particular, according to the following production methods 1 and 2, the compound represented by the general formula (I) can be produced efficiently.

[Production Method 1]
By halogenating the difluorobenzyl group of the difluoromethane derivative represented by the following general formula (II) using a halogenating agent, the compound represented by the general formula (I) can be produced efficiently. In general formula (II), R ¹ , A ¹ , A ² , A ³ , Z ¹ , Z ² , Z ³ , l, m, and n are all the same as in general formula (I).

  The halogenating agent used in Production Method 1 is not particularly limited as long as it can halogenate a hydrogen atom in a halogenated alkyl group, but is preferably a halogenating agent utilizing a radical reaction. . Examples of the halogenating agent include N-bromosuccinimide, N-chlorosuccinimide, chlorine, bromine and iodine. In the present invention, it is preferable to use N-bromosuccinimide, bromine, or chlorine as the halogenating agent.

  When N-bromosuccinimide or N-chlorosuccinimide is used, for example, the difluoromethane derivative represented by the general formula (II), N-bromosuccinimide, and the like are heated and refluxed together with a radical initiator to thereby form the general formula (I ) Can be synthesized. Light irradiation may be performed at the time of heating and refluxing. Examples of the radical initiator include azobisisobutyronitrile and benzoyl peroxide. Also, the compound represented by the general formula (I) can be synthesized by irradiating the difluoromethane derivative represented by the general formula (II) with light such as ultraviolet rays in the presence of a halogen gas such as chlorine or bromine. Can do.

  The organic solvent used as a reaction solvent in each reaction is appropriately selected from known organic solvents that are inert to the reaction and have good solubility for each compound used in the reaction. One type of organic solvent may be used, or two or more types of mixed solvents may be used. The organic solvent used in the production method 1 is preferably an aliphatic ether compound such as diethyl ether, methyl t-butyl ether or ethylene glycol dimethyl ether, or a cyclic ether compound such as tetrahydrofuran or dioxane.

[Production Method 2]
By reacting a carbanion obtained by allowing a base to act on a halogenated benzene derivative represented by the following general formula (III) and a difluoromethane derivative represented by the following general formula (IV), the general formula (I ) Can be efficiently produced. In general formula (III), R ¹ , A ¹ , A ² , A ³ , Z ¹ , Z ² , Z ³ , l, m, and n are all the same as in general formula (I). In general formula (IV), X ¹ and X ² each independently represent a chlorine atom, a bromine atom or an iodine atom. In this manufacturing method, X ¹ in the general formula (IV) is preferably the same as X ^2, and more preferably X ¹ and X ² are both bromine atoms.

  The base used in Production Method 2 is not particularly limited as long as it can generate a carbanion on a benzene ring substituted with 2 or 3 halogen atoms. Examples of the base include lithium amide, alkyl lithium, alkali metal, alkali metal hydride, alkali metal alcoholate, and the like. Examples of lithium amide include lithium tetramethylpiperidide and lithium diisopropylamide. Examples of the alkyl lithium include methyl lithium, ethyl lithium, n-butyl lithium, t-butyl lithium, 2,2-dimethylpropyl lithium and the like. In the present invention, lithium amide is preferably used because 4-position of the terminal difluorobenzene ring of the halogenated benzene derivative represented by the general formula (III) can be more selectively carbanionized. It is more preferable to use peridide or lithium diisopropylamide, and it is more preferable to use lithium tetramethylpiperidide. Lithium tetramethylpiperidide can be synthesized by a conventional method. For example, it can be obtained by reacting alkyllithium such as n-butyllithium with tetramethylpiperidine.

  First, a halogenated benzene derivative represented by the general formula (III) and a base are mixed in an organic solvent that is inert to the reaction and has good solubility for each compound used in the reaction, and the halogenated benzene A carbanion is generated at the 4-position of the terminal difluorobenzene ring of the derivative. Examples of the organic solvent include the same ones as described above. The compound represented by the general formula (I) can be synthesized by reacting the obtained carbanion with the difluoromethane derivative represented by the general formula (IV).

The reaction temperature of each reaction is preferably −45 ° C. or lower, more preferably −65 ° C. or lower, and further preferably −70 ° C. or lower. By setting the reaction temperature in the reaction of the halogenated benzene derivative represented by the general formula (III) and the base to the upper limit value or less, it is more selectively placed at the 4-position of the difluorobenzene ring at the terminal of the halogenated benzene derivative. Carbanions can be generated. In addition, by setting the reaction temperature in the reaction of the carbanion and the difluoromethane derivative represented by the general formula (IV) to the upper limit or less, the “−X” is added to the 4-position of the difluorobenzene ring at the terminal of the halogenated benzene derivative. ^The production of by-products introduced with “ ¹ ” is suppressed, and the compound represented by the general formula (I) can be synthesized with higher efficiency.

[Halogenated benzene derivative represented by general formula (III)]
The difluoromethane derivative represented by the general formula (III) can be synthesized using a known compound as a starting material and appropriately combining known organic synthesis reactions. Among the difluoromethane derivatives represented by the general formula (II), a derivative in which a 1,4-phenylene group is directly bonded to the terminal difluorobenzene ring (for example, n is 1, Z ³ is a single bond) , A derivative in which A ³ is a 1,4-phenylene group), for example, a compound represented by the following general formula (V) is reacted with 2,3-difluorophenylboric acid in the presence of a base and a palladium catalyst. Can be synthesized.

[Difluoromethane derivative represented by general formula (II)]
The difluoromethane derivative represented by the general formula (II) can be synthesized using a known compound as a starting material and appropriately combining known organic synthesis reactions. For example, in the reaction of (1-1) to (1-3) in Example 1 described later, by using the compound represented by the general formula (III) instead of 2,3-difluorobromobenzene, the general formula A difluoromethane derivative represented by (II) can be synthesized.

  EXAMPLES Hereinafter, although an Example etc. are given and this invention is further explained in full detail, this invention is not limited to these Examples etc. Further, “%” in the compositions of the following Examples and Comparative Examples means “% by mass”.

The following abbreviations are used in the compound descriptions in the examples.
THF: Tetrahydrofuran DMF: N, N-dimethylformamide DBH: 1,3-dibromo-3,3-dimethylhydantoin
NBS: N-bromosuccinimide BPO: benzoyl peroxide Et: ethyl group Bu: n-butyl group

Example 1 Production of 4-bromo-2,3-difluoro- (bromodifluoromethyl) benzene via a difluoromethylbenzene derivative (1-1)
Under a nitrogen atmosphere, diisopropylamine (25.2 g) was dissolved in THF (130 mL) and cooled to −70 ° C. or lower. To the solution, 1.6M butyllithium / hexane solution (130 mL) was added dropwise at a rate such that the internal temperature did not become −65 ° C. or higher, followed by stirring at −70 ° C. or lower for 30 minutes. Subsequently, a solution prepared by dissolving 2,3-difluorobromobenzene (40 g) in THF (150 mL) was added dropwise to the stirred reaction solution at a rate such that the internal temperature did not become −65 ° C. or higher, and −70 ° C. or lower. For 1 hour. Subsequently, a solution in which DMF (22.7 g) was dissolved in THF (220 mL) was added dropwise at a rate such that the internal temperature did not become −65 ° C. or higher, and subsequently stirred at −70 ° C. or lower for 1 hour, and then slowly. The temperature was raised to room temperature. 10% hydrochloric acid and toluene were added to the reaction solution to separate the organic layer, and the organic layer was washed with saturated brine. Sodium sulfate was added to the washed organic layer for drying, and then the solvent was distilled off under reduced pressure to obtain a crude 4-bromo-2,3-difluorobenzaldehyde (44.9 g).

(1-2)
4-Bromo-2,3-difluorobenzaldehyde crude product (44.9 g), 1,3-propanedithiol (23.1 g), p-toluenesulfonic acid monohydrate (1.9 g) in toluene (220 mL) And stirred at 80 ° C. for 3 hours. The reaction solution after stirring was cooled to room temperature, and then the organic layer of the reaction solution was washed with a saturated aqueous sodium hydrogen carbonate solution and further washed with a saturated saline solution. Sodium sulfate is added to the washed organic layer for drying, the solvent is distilled off under reduced pressure, and the residue is purified by silica gel column chromatography to give 2- (4-bromo-2,3-difluorophenyl) -1,3. -Dithiane (59.2 g) was obtained.

(1-3)
2- (4-Bromo-2,3-difluorophenyl) -1,3-dithiane (59.2 g) was dissolved in dichloromethane (300 mL) and cooled to −60 ° C. or lower. Triethylamine hydrogen trifluoride complex (41.4 g) and then DBH (81.6 g) were added to the solution at such a rate that the internal temperature did not become -50 ° C. or higher, and the temperature was slowly raised to room temperature. A 10% aqueous sodium hydroxide solution was slowly added to separate the organic layer, and the organic layer was washed with saturated brine. Sodium sulfate is added to the washed organic layer for drying, the solvent is distilled off under reduced pressure, and the residue is purified by silica gel column chromatography to give 4-bromo-2,3-difluoro- (difluoromethyl) benzene (42. 6 g) was obtained.

(1-4)
Under a nitrogen atmosphere, 4-bromo-2,3-difluoro- (difluoromethyl) benzene (42.6 g), NBS (31.2 g) and BPO (20 mg) were suspended in carbon tetrachloride (450 mL) and heated to reflux. Stir for 6 hours. After the reaction liquid after stirring was allowed to cool, water was added to cause liquid separation, the organic layer was separated, and the organic layer was washed with saturated brine. Sodium sulfate was added to the washed organic layer for drying, the solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography to give 4-bromo-2,3-difluoro- (bromodifluoromethyl) benzene (46 0.0 g) was obtained as a slightly yellow liquid.

The results of mass analysis and NMR analysis of the obtained 4-bromo-2,3-difluoro- (bromodifluoromethyl) benzene are shown below.
MS m / z: 324, 322, 320
¹ HNMR (CDCl ₃ , TMS internal standard) δ (ppm) = 7.06 (1H, d, j = 6.9 Hz), 6.70 (1H, d, j = 6.9 Hz)
¹³ C NMR (CDCl ₃ ) δ (ppm) = 152.8, 150.6, 131.4, 129.4, 127.2, 124.6, 112.2

(Example 2) Production of 4-bromo-2,3-difluoro- (bromodifluoromethyl) benzene using difluorodibromomethane (2-1)
Under a nitrogen atmosphere, diisopropylamine (5.8 g) was dissolved in THF (30 mL) and cooled to −70 ° C. or lower. To the solution, 1.6M butyllithium / hexane solution (32 mL) was added dropwise at a rate such that the internal temperature did not become −65 ° C. or higher, followed by stirring at −70 ° C. or lower for 30 minutes. Subsequently, a solution prepared by dissolving 2,3-difluorobromobenzene (10 g) in THF (50 mL) was added dropwise to the stirred reaction solution at a rate such that the internal temperature did not become −65 ° C. or higher, and −70 ° C. or lower. For 1 hour to prepare phenyllithiums. In a separate reaction vessel, a solution prepared by dissolving difluorodibromomethane (16.3 g) in THF (160 mL) is cooled to −70 ° C. or lower, and the previously prepared solution of phenyllithiums is cannulated. Then, the mixture was stirred at −70 ° C. or lower for 1 hour and then warmed to room temperature. Water and hexane were added to the reaction solution to separate the organic layer, and the organic layer was washed twice with saturated brine. Sodium sulfate was added to the washed organic layer for drying, the solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography. 4-bromo-2,3-difluoro- (bromodifluoromethyl) benzene and 1,4 -A mixture (14.5 g) of dibromo-2,3-difluorobenzene was obtained. When the ratio of each compound in the mixture was measured using gas chromatography, 4-bromo-2,3-difluoro- (bromodifluoromethyl) benzene was 78.5%, 1,4-dibromo-2, The amount of 3-difluorobenzene was 21.5%.

Example 3 Synthesis of 2,3-difluoro-4- (4-propylphenyl) -1- (difluorobromomethyl) benzene (3-1)
Under a nitrogen atmosphere, 4-propylbromobenzene (400 g), 2M aqueous potassium carbonate solution (1100 mL) and tetrakistriphenylphosphine palladium (0) (11.6 g) were dissolved in THF (1200 mL) and heated to reflux. Under reflux, a solution of 2,3-difluorophenylboric acid (317 g) dissolved in THF (950 mL) was added, and the mixture was further stirred under reflux for 4 hours. After the reflux, the reaction solution was allowed to cool, and hexane was added to separate the organic layer. Hexane was added to the remaining aqueous layer for liquid separation, and the organic layer was separated again, and combined with the previously separated organic layer. The obtained organic layer was washed twice with saturated brine. Sodium sulfate is added to the washed organic layer and dried. After the solvent is distilled off under reduced pressure, the residue is purified by silica gel column chromatography and recrystallized from ethanol to give 2,3-difluoro-4- (4-propyl). Phenyl) benzene (427 g) was obtained.

(3-2)
Diisopropylamine (26.1 g) was dissolved in THF (130 mL) under dry nitrogen and cooled to −40 ° C. A 1.6M butyllithium / hexane solution (150 mL) was added to the solution at a rate such that the internal temperature did not become −30 ° C. or higher, and the mixture was further stirred at −40 ° C. for 30 minutes. Subsequently, a solution in which 2,3-difluoro-4- (4-propylphenyl) benzene (50 g) was dissolved in THF (250 mL) was added to the reaction solution after stirring, at a speed at which the internal temperature did not exceed -30 ° C. And stirred at -40 ° C for an additional hour. Subsequently, a solution in which dibromodifluoromethane (67.8 g) was dissolved in THF (200 mL) was added at a rate such that the internal temperature did not exceed −30 ° C., and the mixture was further stirred at −40 ° C. for 1 hour. The temperature was raised. Water and hexane were added to the reaction solution for liquid separation, and the organic layer was separated. Hexane was added to the remaining aqueous layer for extraction, and the organic layer was separated again and combined with the previously separated organic layer. The obtained organic layer was washed twice with saturated brine. Sodium sulfate is added to the washed organic layer for drying, the solvent is distilled off, and the residue is purified by silica gel column chromatography to obtain 2,3-difluoro-4- (4-propylphenyl) -1- (difluoro A mixture (56.3 g) of bromomethyl) benzene and 2,3-difluoro-4- (4-propylphenyl) bromobenzene was obtained. When the ratio of each compound in the mixture was measured using gas chromatography, 2,3-difluoro-4- (4-propylphenyl) -1- (difluorobromomethyl) benzene was found to be 73.8%, The amount of 3-difluoro-4- (4-propylphenyl) bromobenzene was 26.2%.

Claims (11)

Formula (I)

(Wherein R ¹ represents a hydrogen atom, a chlorine atom, a bromine atom, an iodine atom, or an alkyl group having 1 to 15 carbon atoms, and one or more methylene groups not adjacent to each other in the alkyl group are an oxygen atom, A sulfur atom or -CH = CH- may be substituted, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom;
A ¹ , A ² and A ³ are each independently a trans-1,4-cyclohexylene group in which one or more methylene groups constituting the ring may be substituted by an oxygen atom or a sulfur atom, or on the ring Represents a 1,4-phenylene group in which one or more hydrogen atoms may be substituted by fluorine atoms,
Z ¹ , Z ² and Z ³ each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —CH ₂ O— or —OCH ₂ —,
l, m and n each independently represents 0 or 1,
X ² represents a chlorine atom, a bromine atom or an iodine atom. ) A compound represented by The compound according to claim 1, wherein in the general formula (I), X ¹ represents a bromine atom. In the general formula (I), A ¹ , A ² and A ³ are each independently

The compound of Claim 1 or 2 showing either of these. In the general formula (I), R ¹ is a chlorine atom, a compound according to any one of claims 1 to 3 represents a bromine atom or an iodine atom. In the general formula (I), a compound according to claim 1 wherein R ¹ represents an alkyl group having 1 to 5 carbon atoms. In the general formula ^{(I), Z 1, Z} 2 and ^{Z 3} are compounds according to any one of claims 1-5 represents a single bond. Formula (II)

(Wherein R ¹ represents a hydrogen atom, a chlorine atom, a bromine atom, an iodine atom, or an alkyl group having 1 to 15 carbon atoms, and one or more methylene groups not adjacent to each other in the alkyl group are an oxygen atom, A sulfur atom or -CH = CH- may be substituted, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom;
A ¹ , A ² and A ³ are each independently a trans-1,4-cyclohexylene group in which one or more methylene groups constituting the ring may be substituted by an oxygen atom or a sulfur atom, or on the ring Represents a 1,4-phenylene group in which one or more hydrogen atoms may be substituted by fluorine atoms,
Z ¹ , Z ² and Z ³ each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —CH ₂ O— or —OCH ₂ —,
l, m and n each independently represents 0 or 1; The difluorobenzyl group of the difluoromethane derivative represented by the general formula (I) is halogenated using a halogenating agent.

(In the formula, X ² represents a chlorine atom, a bromine atom or an iodine atom, and R ¹ , A ¹ , A ² , A ³ , Z ¹ , Z ² , Z ³ , l, m and n are represented by the general formula ( It is the same as II). A method for producing a compound, which comprises producing a compound represented by   The method for producing a compound according to claim 7, wherein N-bromosuccinimide, bromine, or chlorine is used as the halogenating agent. Formula (III)

(Wherein R ¹ represents a hydrogen atom, a chlorine atom, a bromine atom, an iodine atom, or an alkyl group having 1 to 15 carbon atoms, and one or more methylene groups not adjacent to each other in the alkyl group are an oxygen atom, A sulfur atom or -CH = CH- may be substituted, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom;
A ¹ , A ² and A ³ are each independently a trans-1,4-cyclohexylene group in which one or more methylene groups constituting the ring may be substituted by an oxygen atom or a sulfur atom, or on the ring Represents a 1,4-phenylene group in which one or more hydrogen atoms may be substituted by fluorine atoms,
Z ¹ , Z ² and Z ³ each independently represent a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —CH ₂ O— or —OCH ₂ —,
l, m and n each independently represents 0 or 1; A carbanion obtained by allowing a base to act on a halogenated benzene derivative represented by formula (IV);

(Wherein, X ¹ and X ² each independently represent a chlorine atom, a bromine atom or an iodine atom) to react with a difluoromethane derivative represented by the general formula (I)

(In the formula, X ² is the same as in the general formula (IV), and R ¹ , A ¹ , A ² , A ³ , Z ¹ , Z ² , Z ³ , l, m, and n are the same as those in the general formula. (It is the same as (III).) The manufacturing method of a compound characterized by manufacturing the compound represented by this.   The method for producing a compound according to claim 9, wherein lithium amide is used as the base. Manufacturing method of the In formula (IV), a compound according to claim 9 or 10 X ¹ and X ² are both bromine atoms.