JP6079431B2 - Method for producing boron compound - Google Patents

Description

（Ｉ） （ＩＩ）
〔Ｙは、２価の基を表し、Ｗは、ホウ酸エステル残基を表す。〕 The present invention relates to a method for producing a boron compound represented by the following formula (II) from a compound represented by the following formula (I).

(I) (II)
[Y represents a divalent group, and W represents a boric acid ester residue. ]

In recent years, in order to prevent global warming, reduction of CO ₂ released into the atmosphere has been demanded. Therefore, the adoption of a solar system using a pn junction type silicon-based solar cell which is one embodiment of an electronic element has been proposed. However, single-crystal silicon, polycrystalline silicon, and amorphous silicon, which are materials for silicon-based solar cells, require high-temperature processes and high-vacuum processes in their production.

  On the other hand, organic thin-film solar cells containing an organic layer containing a polymer compound can omit the high-temperature process and high-vacuum process used in the silicon-based solar cell manufacturing process, and may be inexpensively manufactured only by the coating process. In recent years, it has attracted attention. As a polymer compound used in an organic thin film solar cell, a polymer compound having a repeating unit represented by the following formula (A) has been studied, and a monomer giving this repeating unit is represented by the above formula (II). Boron compounds are used (see Patent Document 1). As a method for producing this boron compound, a method is disclosed in which the compound represented by the formula (I) is once brominated and then boronated (see Patent Document 1).

（Ａ）
〔Ｙは、２価の基を表す。〕

(A)
[Y represents a divalent group. ]

JP 2012-107187 A

  However, the conventional production methods have the disadvantages that the reaction time is long and the yield is low.

  Therefore, an object of the present invention is to provide a method for producing the boron compound represented by the formula (II) from the compound represented by the formula (I) in a good yield in a short reaction time. .

（Ｉ）
〔式（Ｉ）中、Ｙは、２価の基を表す。〕

〔式（Ｗ２−１）中、Ｒ^１、Ｒ^２及びＲ^３は、それぞれ独立に、水素原子又は炭素数１〜１０のアルキル基を表し、Ｒ^２及びＲ^３は、互いに連結して、それらが結合する酸素原子とともに炭素数１〜１０のアルカン環状構造を形成してもよい。〕
該第２の中間体と、アルコール又は２価カルボン酸とを反応させる工程とを有する、下記式（ＩＩ）で表されるホウ素化合物の製造方法を提供する。

（ＩＩ）
〔式（ＩＩ）中、Ｗは、ホウ酸エステル残基を表す。Ｙは、前記と同じ意味を表す。〕 That is, in the present invention, first, a first intermediate obtained by reacting a compound represented by the following formula (I) with a lithium amide compound or an alkyl lithium compound, and the following formula (W2-1): Reacting the represented compound to produce a second intermediate;

(I)
[In formula (I), Y represents a divalent group. ]

[In Formula (W2-1), R ¹ , R ² and R ³ each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R ² and R ³ are linked to each other, and An alkane cyclic structure having 1 to 10 carbon atoms may be formed together with the oxygen atom to which is bonded. ]
Provided is a method for producing a boron compound represented by the following formula (II), which comprises a step of reacting the second intermediate with an alcohol or a divalent carboxylic acid.

(II)
[In formula (II), W represents a boric acid ester residue. Y represents the same meaning as described above. ]

That is, the present invention secondly, the alcohol is a compound represented by any one of the following formulas (W3-1) to (W3-8), and the divalent carboxylic acid is represented by the following formula (W3-9). And a method for producing the boron compound.

That is, the present invention thirdly relates to the boron compound, wherein the boric acid ester residue represented by W is a group represented by any one of the following formulas (W4-1) to (W4-12): A manufacturing method is provided.

〔式（Ｙ−１）〜式（Ｙ−４）中、Ｒは、それぞれ独立に、水素原子、ハロゲン原子又は、置換基を表す。〕 That is, the present invention fourthly relates to the boron compound in which the divalent group represented by Y is a group represented by any one of the following formulas (Y-1) to (Y-4). A manufacturing method is provided.

[In formula (Y-1) to formula (Y-4), R each independently represents a hydrogen atom, a halogen atom or a substituent. ]

  That is, the fifth aspect of the present invention provides a method for producing the boron compound, wherein the lithium amide compound or the alkyl lithium compound is lithium diisopropylamide.

  According to the present invention, the boron compound represented by the formula (II) can be obtained from the compound represented by the formula (I) with a good yield in a short reaction time, which is extremely useful. .

  Hereinafter, the present invention will be described in detail.

The method for producing a boron compound represented by the formula (II) of the present invention uses a compound represented by the following formula (I) as a raw material.

  In formula (I), Y represents a divalent group. Examples of the divalent group represented by Y include groups represented by the following formulas (Y-1) to (Y-4).

  When Y is a group represented by formula (Y-1) to formula (Y-4), the compound represented by formula (I) is represented by the following formula (I-1) to formula (I-4). The

  Of the compounds represented by formula (I-1) to formula (I-4), the compound represented by formula (I-1) is preferred from the viewpoint of ease of synthesis.

  In formulas (I-1) to (I-4), R represents a hydrogen atom, a halogen atom or a substituent. The substituent is a monovalent group, for example, an optionally substituted alkyl group, an optionally substituted alkoxy group, an optionally substituted alkylthio group, an aryl group, an aryloxy group, an arylthio group. , An optionally substituted arylalkyl group, an optionally substituted arylalkoxy group, an optionally substituted arylalkylthio group, an optionally substituted acyl group, an optionally substituted acyloxy group, a substituted An optionally substituted amide group, an optionally substituted acid imide group, an amino group, a substituted amino group, a substituted silyl group, a substituted silyloxy group, a substituted silylthio group, a substituted silylamino group, a heterocyclic group, a heterocyclic oxy group, Examples include a heterocyclic thio group, an arylalkenyl group, an arylalkynyl group, a carboxyl group, and a cyano group. In each of formulas (I-1) to (I-4), when there are a plurality of R, they may be the same or different.

  Examples of the halogen atom represented by R include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, and a fluorine atom is preferred.

  The alkyl group which may be substituted may be linear or branched, and may be a cycloalkyl group. Carbon number of an alkyl group is 1-30 normally. Examples of the substituent that the alkyl group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the alkyl group which may have a substituent include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl grave, a pentyl group, and an isopentyl group. 2-methylbutyl group, 1-methylbutyl group, hexyl group, isohexyl group, 3-methylpentyl group, 2-methylpentyl group, 1-methylpentyl group, heptyl group, octyl group, isooctyl group, 2-ethylhexyl group, 3 , 7-dimethyloctyl group, nonyl group, decyl group, undecyl group, dodecyl group, tetradecyl group, hexadecyl tomb, octadecyl group, eicosyl group and other chain alkyl groups, cyclopentyl group, cyclohexyl group and adamantyl group and other cycloalkyl groups Is mentioned.

  The alkoxy group which may be substituted may be linear or branched, and may be a cycloalkoxy group. Examples of the substituent that the alkoxy group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Carbon number of an alkoxy group is about 1-20 normally. Specific examples of the alkoxy group which may have a substituent include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, an isobutoxy group, a tert-butoxy group, a pentyloxy group, a hexyloxy group, and a cyclohexyl group. Oxy group, heptyloxy group, octyloxy group, 2-ethylhexyloxy group, nonyloxy group, decyloxy group, 3,7-dimethyloctyloxy group, lauryloxy group, trifluoromethoxy group, pentafluoroethoxy group, perfluorobutoxy group Perfluorohexyloxy group, perfluorooctyloxy group, methoxymethyloxy group and 2-methoxyethyloxy group.

  The alkylthio group which may be substituted may be linear or branched, and may be a cycloalkylthio group. Examples of the substituent that the alkylthio group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. The carbon number of the alkylthio group is usually about 1-20. Specific examples of the alkylthio group which may have a substituent include a methylthio group, an ethylthio group, a propylthio group, an isopropylthio group, a butylthio group, an isobutylthio group, a tert-butylthio group, a pentylthio group, a hexylthio group, and a cyclohexylthio group. Group, heptylthio group, octylthio group, 2-ethylhexylthio group, nonylthio group, decylthio group, 3,7-dimethyloctylthio group, laurylthio group and trifluoromethylthio group.

  The aryl group is an atomic group obtained by removing one hydrogen atom on an aromatic ring from an aromatic hydrocarbon which may have a substituent, and the number of carbon atoms is usually 6 to 60. Examples of the substituent include a halogen atom, an optionally substituted alkoxy group, and an optionally substituted alkylthio group. Specific examples of the halogen atom, the optionally substituted alkoxy group and the optionally substituted alkylthio group include a halogen atom represented by R, an optionally substituted alkyl group, and an optionally substituted alkoxy. The same as the specific examples of the group and the optionally substituted alkylthio group. Specific examples of the aryl group include a phenyl group and a C1 to C12 alkyloxyphenyl group (C1 to C12 alkyl is an alkyl having 1 to 12 carbon atoms. The C1 to C12 alkyl is preferably a C1 to C8 alkyl. More preferably C1-C6 alkyl, C1-C8 alkyl indicates alkyl having 1 to 8 carbon atoms, and C1-C6 alkyl indicates alkyl having 1 to 6 carbon atoms. Specific examples of C1 to C12 alkyl, C1 to C8 alkyl, and C1 to C6 alkyl include those described and exemplified for the above alkyl group, and the same applies to the following.), C1 to C12 alkylphenyl group, 1 -A naphthyl group, 2-naphthyl group, and a pentafluorophenyl group are mentioned.

  The aryloxy group usually has about 6 to 60 carbon atoms. Specific examples of the aryloxy group include a phenoxy group, a C1-C12 alkyloxyphenoxy group, a C1-C12 alkylphenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, and a pentafluorophenyloxy group.

  The arylthio group usually has about 6 to 60 carbon atoms. Specific examples of the arylthio group include a phenylthio group, a C1-C12 alkyloxyphenylthio group, a C1-C12 alkylphenylthio group, a 1-naphthylthio group, a 2-naphthylthio group, and a pentafluorophenylthio group.

  The arylalkyl group which may be substituted usually has about 7 to 60 carbon atoms, and the alkyl portion may have a substituent. Examples of the substituent include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the arylalkyl group which may have a substituent include a phenyl-C1-C12 alkyl group, a C1-C12 alkyloxyphenyl-C1-C12 alkyl group, and a C1-C12 alkylphenyl-C1-C12 alkyl group. 1-naphthyl-C1-C12 alkyl group and 2-naphthyl-C1-C12 alkyl group.

  The arylalkoxy group which may be substituted usually has about 7 to 60 carbon atoms, and the alkoxy moiety may have a substituent. Examples of the substituent include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the arylalkyloxy group which may have a substituent include a phenyl-C1-C12 alkyloxy group, a C1-C12 alkyloxyphenyl-C1-C12 alkyloxy group, and a C1-C12 alkylphenyl-C1- A C12 alkyloxy group, a 1-naphthyl-C1-C12 alkyloxy group, and a 2-naphthyl-C1-C12 alkyloxy group are mentioned.

  The arylalkylthio group which may be substituted usually has about 7 to 60 carbon atoms, and the alkylthio moiety may have a substituent. Examples of the substituent include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the arylalkylthio group which may have a substituent include a phenyl-C1-C12 alkylthio group, a C1-C12 alkyloxyphenyl-C1-C12 alkylthio group, and a C1-C12 alkylphenyl-C1-C12 alkylthio group. 1-naphthyl-C1-C12 alkylthio group and 2-naphthyl-C1-C12 alkylthio group.

  The acyl group which may be substituted usually has about 2 to 20 carbon atoms. Examples of the substituent that the acyl group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the acyl group which may have a substituent include an acetyl group, a propionyl group, a butyryl group, an isobutyryl group, a pivaloyl group, a benzoyl group, a trifluoroacetyl group, and a pentafluorobenzoyl group.

  The acyloxy group which may be substituted usually has about 2 to 20 carbon atoms. Examples of the substituent that the acyloxy group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the acyloxy group which may have a substituent include an acetoxy group, a propionyloxy group, a butyryloxy group, an isobutyryloxy group, a pivaloyloxy group, a benzoyloxy group, a trifluoroacetyloxy group, and a pentafluorobenzoyloxy group. Groups.

  The amide group which may be substituted usually has about 1 to 20 carbon atoms. An amide group refers to a group obtained by removing a hydrogen atom bonded to a nitrogen atom from an amide. Examples of the substituent that the amide group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the amide group which may have a substituent include a formamide group, an acetamide group, a propioamide group, a butyroamide group, a benzamide group, a trifluoroacetamide group, a pentafluorobenzamide group, a diformamide group, a diacetamide group, Examples include a dipropioamide group, a dibutyroamide group, a dibenzamide group, a ditrifluoroacetamide group, and a dipentafluorobenzamide group.

  The optionally substituted acid imide group refers to a group obtained by removing a hydrogen atom bonded to a nitrogen atom from an acid imide. Examples of the substituent that the acid imide group may have include a halogen atom. Specific examples of the halogen atom are the same as the specific examples of the halogen atom represented by R. Specific examples of the acid imide group which may have a substituent include a succinimide group and a phthalimide group.

  The substituted amino group usually has about 1 to 40 carbon atoms. As a substituent which a substituted amino group has, the alkyl group and aryl group which may be substituted are mentioned, for example. Specific examples of the optionally substituted alkyl group and aryl group are the same as the specific examples of the optionally substituted alkyl group and aryl group represented by R. Specific examples of the substituent amino group include methylamino group, dimethylamino group, ethylamino group, diethylamino group, propylamino group, dipropylamino group, isopropylamino group, diisopropylamino group, butylamino group, isobutylamino group, tert-Butylamino group, pentylamino group, hexylamino group, cyclohexylamino group, heptylamino group, octylamino group, 2-ethylhexylamino group, nonylamino group, decylamino group, 3,7-dimethyloctylamino group, laurylamino group , Cyclopentylamino group, dicyclopentylamino group, cyclohexylamino group, dicyclohexylamino group, pyrrolidyl group, piperidyl group, ditrifluoromethylamino group, phenylamino group, diphenylamino group, C1-C12 al Kiroxyphenylamino group, di (C1-C12 alkyloxyphenyl) amino group, di (C1-C12 alkylphenyl) amino group, 1-naphthylamino group, 2-naphthylamino group, pentafluorophenylamino group, pyridylamino group, Pyridazinylamino group, pyrimidylamino group, pyrazylamino group, triazylamino group, phenyl-C1-C12 alkylamino group, C1-C12 alkyloxyphenyl-C1-C12 alkylamino group, C1-C12 alkylphenyl-C1-C12 Alkylamino group, di (C1-C12 alkyloxyphenyl-C1-C12 alkyl) amino group, di (C1-C12 alkylphenyl-C1-C12 alkyl) amino group, 1-naphthyl-C1-C12 alkylamino group and 2- Naphthyl-C1 It includes C12 alkylamino group.

  As a substituent which a substituted silyl group has, the alkyl group and aryl group which may be substituted are mentioned, for example. Specific examples of the optionally substituted alkyl group and aryl group are the same as the specific examples of the optionally substituted alkyl group and aryl group represented by R. Specific examples of the substituted silyl group include trimethylsilyl group, triethylsilyl group, tripropylsilyl group, triisopropylsilyl group, tert-butyldimethylsilyl group, triphenylsilyl group, tri-p-xylylsilyl group, tribenzylsilyl group, Examples include a diphenylmethylsilyl group, a tert-butyldiphenylsilyl group, and a dimethylphenylsilyl group.

  As a substituent which a substituted silyloxy group has, the alkyl group and aryl group which may be substituted are mentioned, for example. Specific examples of the optionally substituted alkyl group and aryl group are the same as the specific examples of the optionally substituted alkyl group and aryl group represented by R. Specific examples of the substituted silyloxy group include trimethylsilyloxy group, triethylsilyloxy group, tripropylsilyloxy group, triisopropylsilyloxy group, tert-butyldimethylsilyloxy group, triphenylsilyloxy group, tri-p-xylyl group. Examples thereof include a silyloxy group, a tribenzylsilyloxy group, a diphenylmethylsilyloxy group, a tert-butyldiphenylsilyloxy group, and a dimethylphenylsilyloxy group.

  As a substituent which a substituted silylthio group has, the alkyl group and aryl group which may be substituted are mentioned, for example. Specific examples of the optionally substituted alkyl group and aryl group are the same as the specific examples of the optionally substituted alkyl group and aryl group represented by R. Specific examples of the substituted silylthio group include trimethylsilylthio group, triethylsilylthio group, tripropylsilylthio group, triisopropylsilylthio group, tert-butyldimethylsilylthio group, triphenylsilylthio group, and tri-p-xylyl. Examples thereof include a silylthio group, a tribenzylsilylthio group, a diphenylmethylsilylthio group, a tert-butyldiphenylsilylthio group, and a dimethylphenylsilylthio group.

  As a substituent which a substituted silylamino group has, the alkyl group and aryl group which may be substituted are mentioned, for example. Specific examples of the optionally substituted alkyl group and aryl group are the same as the specific examples of the optionally substituted alkyl group and aryl group represented by R. Specific examples of the substituted silylamino group include trimethylsilylamino group, triethylsilylamino group, tripropylsilylamino group, triisopropylsilylamino group, tert-butyldimethylsilylamino group, triphenylsilylamino group, tri-p-xylyl. Silylamino group, tribenzylsilylamino group, diphenylmethylsilylamino group, tert-butyldiphenylsilylamino group, dimethylphenylsilylamino group, di (trimethylsilyl) amino group, di (triethylsilyl) amino group, di (tripropylsilyl) ) Amino group, di (triisopropylsilyl) amino group, di (tert-butyldimethylsilyl) amino group, di (triphenylsilyl) amino group, di (tri-p-xylylsilyl) amino group, di (tribenzylsilyl) A Amino group, di (diphenylmethyl silyl) amino, di (tert- butyldiphenylsilyl) amino group and di (dimethylphenylsilyl) and amino group.

  The heterocyclic group is an atomic group obtained by removing one hydrogen atom on the heterocyclic ring from a heterocyclic compound which may have a substituent. Examples of the heterocyclic compound include furan, thiophene, pyrrole, pyrroline, pyrrolidine, oxazole, isoxazole, thiazole, isothiazole, imidazole, imidazoline, imidazolidine, pyrazole, pyrazoline, prazolidine, furazane, triazole, thiadiazole, oxadi Azole, tetrazole, pyran, pyridine, piperidine, thiopyran, pyridazine, pyrimidine, pyrazine, piperazine, morpholine, triazine, benzofuran, isobenzofuran, benzothiophene, indole, isoindole, indolizine, indoline, isoindoline, chromene, chroman, isochroman , Benzopyran, quinoline, isoquinoline, quinolidine, benzimidazole, benzothiazole, indazole, Fuchirijin, quinoxaline, quinazoline, Kinazorijin, cinnoline, phthalazine, purine, pteridine, carbazole, xanthene, phenanthridine, acridine, beta-carboline, perimidine, phenanthroline, thianthrene, phenoxathiin, phenoxazine, and phenothiazine and phenazine. Examples of the substituent that the heterocyclic compound may have include a halogen atom, an optionally substituted alkyl group, an optionally substituted alkoxy group, and an optionally substituted alkylthio group. . Specific examples of the halogen atom, an optionally substituted alkyl group, an optionally substituted alkoxy group, and a substituted and optionally substituted alkylthio group include a halogen atom represented by R, an optionally substituted Specific examples of the good alkyl group, the optionally substituted alkoxy group and the optionally substituted alkylthio group are the same. As the heterocyclic group, an aromatic heterocyclic group is preferable.

  Examples of the heterocyclic oxy group include a group represented by the formula (A-1) in which an oxygen atom is bonded to the monovalent heterocyclic group.

（Ａ−１） （Ａ−２）
（式（Ａ−１）及び式（Ａ−２）中、Ａｒ^３は１価の複素環基を表す。） Examples of the heterocyclic thio group include a group represented by the formula (A-2) in which a sulfur atom is bonded to the monovalent heterocyclic group.

(A-1) (A-2)
(In Formula (A-1) and Formula (A-2), Ar ³ represents a monovalent heterocyclic group.)

  Specific examples of the heterocyclic oxy group include thienyloxy group, C1-C12 alkylthienyloxy group, pyrrolyloxy group, furyloxy group, pyridyloxy group, C1-C12 alkylpyridyloxy group, imidazolyloxy group, pyrazolyloxy group, triazolyl group. And a ruoxy group, an oxazolyloxy group, a thiazoleoxy group, and a thiadiazoleoxy group.

  Specific examples of the heterocyclic thio group include thienyl mercapto group, C1-C12 alkyl thienyl mercapto group, pyrrolyl mercapto group, furyl mercapto group, pyridyl mercapto group, C1-C12 alkyl pyridyl mercapto group, imidazolyl mercapto group, pyrazolyl mercapto group. , Triazolyl mercapto group, oxazolyl mercapto group, thiazole mercapto group and thiadiazole mercapto group.

  The arylalkenyl group usually has 8 to 20 carbon atoms. Specific examples of the arylalkenyl group include a styryl group.

  The arylalkynyl group usually has 8 to 20 carbon atoms. Specific examples of the arylalkynyl group include a phenylacetylenyl group.

  From the viewpoint of enhancing the solubility of a polymer compound synthesized using the reactive compound of the present invention (hereinafter, the polymer compound is referred to as the polymer compound of the present invention) in a solvent, R is a carbon number of 6 The above alkyl groups, alkoxy groups having 6 or more carbon atoms, alkylthio groups having 6 or more carbon atoms, aryl groups, aryloxy groups, arylthio groups, arylalkyl groups, arylalkyloxy groups, arylalkylthio groups, acyl having 6 or more carbon atoms And an acyloxy group having 6 or more carbon atoms, an alkyl group having 6 or more carbon atoms, an alkoxy group having 6 or more carbon atoms, an aryl group, and an aryloxy group are more preferable, and an alkyl group having 6 or more carbon atoms is particularly preferable.

  Examples of the alkyl group having 6 or more carbon atoms which is a preferred embodiment of R include a hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, Linear alkyl groups such as heptadecyl group, octadecyl group, nonadecyl group, icosyl group, triacontyl group, tetracontyl group, pentacontyl group, 1,1,3,3-tetramethylbutyl group, 1-methylheptyl group, 2 -Ethylhexyl group, 3,7-dimethyloctyl group, 1-propylpentyl group, 3-heptyldodecyl group, 2-heptylundecyl group, 2-octyldodecyl group, 3,7,11-trimethyldodecyl group, 3,7 , 11,15-tetramethylhexadecyl group and 3,5,5-trimethylhexyl group It includes branched alkyl groups.

  The alkyl group having 6 or more carbon atoms is appropriately selected in consideration of the solubility of the polymer compound of the present invention in a solvent, etc., and is a hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group. Group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, 2-ethylhexyl group, 3,7-dimethyloctyl group, 1-propylpentyl group and 3-heptyldodecyl group are preferred, hexyl group, heptyl group, octyl group, More preferred are dodecyl, tetradecyl, hexadecyl, 2-ethylhexyl, 3,7-dimethyloctyl and 3-heptyldodecyl, hexyl, octyl, dodecyl, hexadecyl, 2-ethylhexyl, 3, A 7-dimethyloctyl group and a 3-heptyldodecyl group are particularly preferred.

  As the aryl group which is a preferable embodiment of R, a phenyl group substituted with an alkyl group is preferable in consideration of solubility of the polymer compound of the present invention in a solvent. The substitution position of the alkyl group is preferably the para position. Examples of the phenyl group substituted with an alkyl group at the para position include p-hexylphenyl group, p-heptylphenyl group, p-octylphenyl group, p-nonylphenyl group, p-decylphenyl group, p-undecylphenyl group, p-dodecylphenyl group, p-tridecylphenyl group, p-tetradecylphenyl group, p-pentadecylphenyl group, p-hexadecylphenyl group, p-2-ethylhexylphenyl group, p-3,7-dimethyloctyl A phenyl group, p-1-propylpentylphenyl group and p-2-hexyldecylphenyl group are preferred, and p-hexylphenyl group, p-heptylphenyl group, p-octylphenyl group, p-dodecylphenyl group, p-penta Decylphenyl group, p-hexadecylphenyl group, p-2-ethylhexylphenyl group, -3,7-dimethyloctylphenyl group and p-2-hexyldecylphenyl group are more preferred, p-dodecylphenyl group, p-pentadecylphenyl group, p-2-ethylhexylphenyl group and p-3,7-dimethyl An octylphenyl group is particularly preferred.

  In the method for producing a boron compound of the present invention, a compound represented by the formula (I) is reacted with a lithium amide compound or an alkyl lithium compound to obtain a first intermediate.

The first intermediate is represented by the following formula (I′-a) or formula (I′-b).

  In formula (I), specific examples of Y are the same as described above.

  When Y is a group represented by the formula (Y-1) to the formula (Y-4), the first intermediate is represented by the following formula (I′-1) to the formula (I′-8). .

  In formula (I′-1) to formula (I′-8), R represents the same meaning as described above.

  Examples of the lithium amide compound or the alkyl lithium compound include secondary butyl lithium, tertiary butyl lithium, lithium bistrimethylsilylamide, and lithium diisopropylamide.

  Lithium diisopropylamide is preferred from the viewpoint of synthesis yield using a lithium amide compound or an alkyllithium compound.

The first intermediate is reacted with a compound represented by the following formula (W2-1) to obtain a second intermediate.

In formula (W2-1), R ¹ , R ² and R ³ each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R ² and R ³ are connected to each other, You may form a C1-C10 alkane cyclic structure with the oxygen atom to couple | bond.

Examples of the compound represented by the formula (W2-1) include the following formulas (W2′-1) to (W2′-7).

  Among the compounds represented by formulas (W2′-1) to (W2′-7), from the viewpoint of ease of handling in synthesis, formula (W2′-1), formula (W2′-2) and A compound represented by the formula (W2′-3) is preferable.

The second intermediate is represented by the following formula (I ″ -a) or formula (I ″ -b).

  In formula (I), specific examples of Y are the same as described above.

  When Y is a group represented by the formula (Y-1) to the formula (Y-4), the second intermediate is represented by the following formula (I ″ -1) to the formula (I ″ -8). Is done.

  In formula (I ″ -1) to formula (I ″ -8), R represents the same meaning as described above.

In formula (I ″ -1) to formula (I ″ -8), R ² and R ³ represent the same meaning as described above.

In formula (I ″ -1) to formula (I ″ -8), R ² and R ³ are often hydrogen atoms, but R ² and R ³ are not limited to hydrogen atoms.

The second intermediate is reacted with alcohol or divalent carboxylic acid to obtain a boron compound represented by the following formula (II).

  The second intermediate of formula (I ″ -5) to formula (I ″ -8) obtained from the first intermediate of formula (I′-5) to formula (I′-8) is: In the production method of the present invention, it reacts with a lithium amide compound or an alkyl lithium compound again to produce a second intermediate of the formula (I ″ -1) to the formula (I ″ -4), and the formula (II) To obtain a compound represented by:

  In formula (II), W represents a boric acid ester residue. Specific examples of Y are the same as described above.

  As the alcohol, a compound represented by any one of the following formulas (W3-1) to (W3-8) is preferable from the viewpoint of handling, and the divalent carboxylic acid is represented by the following formula (W3-9). The represented compounds are preferred from the viewpoint of handling.

  In the formula (II), examples of the boric acid ester residue represented by W include groups represented by the following formulas (W4-1) to (W4-12).

  The boron compound represented by the formula (II) is exemplified by the following formulas (II-1) to (II-32).

  Of the structures exemplified by the formulas (II-1) to (II-32), from the viewpoint of ease of synthesis, the structures represented by the formula (II-13), the formula (II-17) and the formula (II-21) The structure is preferred.

  By using the compounds represented by formulas (II-17) to (II-20) synthesized by the production method of the present invention as raw materials, the following formulas (II′-17) to (II′-20) The boron compound represented by can be synthesized.

〔式中、Ｒは、前述と同じ意味を表わす。式中、Ｍは、リチウム原子、ナトリウム原子又はカリウム原子を表す。〕

[Wherein R represents the same meaning as described above. In the formula, M represents a lithium atom, a sodium atom or a potassium atom. ]

  By using the boron compound represented by the formula (II) synthesized using the production method of the present invention, a polymer compound can be synthesized.

  In addition to the reactive compound represented by the formula (II), a polymer compound can be produced even when the reactive compounds represented by the formulas (II′-17) to (II′-20) are used. it can.

  The method for producing the polymer compound synthesis using the compound using the production method of the present invention is not particularly limited, but the Suzuki coupling reaction is used from the viewpoint of ease of synthesis of the polymer compound. I can do things.

  Since the polymer compound produced using the compound using the production method of the present invention can exhibit high electron and / or hole transport properties, when an organic thin film containing the polymer compound is used in the device, Electrons and holes injected from the electrodes or charges generated by light absorption can be transported. Taking advantage of these characteristics, it can be suitably used for various electronic devices such as a photoelectric conversion device, an organic thin film transistor, and an organic electroluminescence device.

  For example, in the photoelectric conversion element, the polymer compound of the present invention is used as a material for the active layer. In the organic thin film transistor, the polymer compound of the present invention is used for an organic semiconductor layer (active layer) that becomes a current path between the source electrode and the drain electrode. In the organic electroluminescence device, the polymer compound of the present invention is used for a light emitting layer.

  Examples will be shown below for illustrating the present invention in more detail, but the present invention is not limited to these examples.

(NMR measurement)
The NMR measurement was performed by dissolving the compound in deuterated chloroform and using an NMR apparatus (Varian, INOVA300).

(LC measurement)
LC measurement was performed using a LC device (manufactured by Shimadzu Corporation, LC-20A) after dissolving the compound in tetrahydrofuran.

５００ｍｌフラスコに、４，５−ジフルオロ−１，２−ジアミノベンゼン（化合物１）（東京化成工業製）を１０．２ｇ（７０．８ｍｍｏｌ）、ピリジンを１５０ｍＬ入れて均一溶液とした。フラスコを０℃に冷却し、フラスコ内に塩化チオニル１６．０ｇ（１３４ｍｍｏｌ）を滴下した。滴下後、フラスコを２５℃に温めて、６時間反応を行った。その後、反応液に水２５０ｍｌを加え、さらにクロロホルムを加えて反応生成物を含む有機層を抽出した。クロロホルム溶液である有機層を硫酸ナトリウムで乾燥し、濾過した。濾液をエバポレーターで濃縮し、析出した固体を再結晶で精製した。再結晶の溶媒には、メタノールを用いた。精製後、化合物２を１０．５ｇ（６１．０ｍｍｏｌ）得た。 Synthesis example 1
(Synthesis of Compound 2)

In a 500 ml flask, 10.2 g (70.8 mmol) of 4,5-difluoro-1,2-diaminobenzene (Compound 1) (manufactured by Tokyo Chemical Industry Co., Ltd.) and 150 mL of pyridine were added to obtain a homogeneous solution. The flask was cooled to 0 ° C., and 16.0 g (134 mmol) of thionyl chloride was dropped into the flask. After dropping, the flask was warmed to 25 ° C. and reacted for 6 hours. Thereafter, 250 ml of water was added to the reaction solution, and chloroform was further added to extract an organic layer containing the reaction product. The organic layer, which is a chloroform solution, was dried over sodium sulfate and filtered. The filtrate was concentrated with an evaporator, and the precipitated solid was purified by recrystallization. Methanol was used as the solvent for recrystallization. After purification, 10.5 g (61.0 mmol) of Compound 2 was obtained.

¹ H-NMR (CDCl ₃ , δ (ppm)): 7.75 (s, 2H)
¹⁹ F-NMR (CDCl ₃ , δ (ppm)): -128.3 (s, 2F)

四つ口フラスコを用いて、化合物２（９．４７ｇ，５５．００ｍｍｏｌ）及び、テトラヒドロフラン（４００ｍＬ）を加え、室温で３０分間アルゴンバブリングを行った。−７８℃に冷却後、リチウムジイソプロピルアミド（ヘキサンサスペンション １０ｗ％，２２５ｍＬ，１３７．５ｍｍｏｌ）を加え、２０分間攪拌し、２−イソプロポキシ−４，４，５，５−テトラメチル−１，３，２−ジオキサボロラン（３０．７０ｇ，１６５．０ｍｍｏｌ）を加え、１時間攪拌した。次にピナコール（２６．００ｇ，２２０．０ｍｍｏｌ）を加え、室温にしながら、硫酸をpHが１〜２になるまで滴下して、３時間攪拌した。セライトろ過を行い、濃縮後、メタノール／水を系中に入れ、析出した固体をろ取し、ヘキサンで再結晶を行い、白色固体の化合物３を８．４２ｇ得た。（収率３６．１％） Example 1
(Synthesis of Compound 3)

Using a four-necked flask, compound 2 (9.47 g, 55.00 mmol) and tetrahydrofuran (400 mL) were added, and argon bubbling was performed at room temperature for 30 minutes. After cooling to −78 ° C., lithium diisopropylamide (hexane suspension 10 w%, 225 mL, 137.5 mmol) was added, stirred for 20 minutes, and 2-isopropoxy-4,4,5,5-tetramethyl-1,3, 2-Dioxaborolane (30.70 g, 165.0 mmol) was added and stirred for 1 hour. Next, pinacol (26.00 g, 220.0 mmol) was added, and sulfuric acid was added dropwise until the pH became 1 to 2 at room temperature, followed by stirring for 3 hours. After filtration through celite and concentration, methanol / water was added to the system, and the precipitated solid was collected by filtration and recrystallized from hexane to obtain 8.42 g of Compound 3 as a white solid. (Yield 36.1%)

¹ H-NMR (CDCl ₃ , δ (ppm)): 1.45 (s, 24H)
¹⁹ F-NMR (CDCl ₃ , δ (ppm)): -117 (s, 2F)

四つ口フラスコを用いて、化合物２（１．７２ｇ，１０．００ｍｍｏｌ）及び、テトラヒドロフラン（１００ｍＬ）を加え、室温で３０分間アルゴンバブリングを行った。−７８℃に冷却後、リチウムジイソプロピルアミド （ヘキサンサスペンション １０ｗ％，４９．１ｍＬ，３０．０ｍｍｏｌ）を加え、２０分間攪拌し、トリメトキシボラン（３．４３ｇ，３３．０ｍｍｏｌ）を加え、１時間攪拌した。次に２，２−ジメチル−１，３−プロパンジオール（４．１７ｇ，４０．０ｍｍｏｌ）を加え、室温にしながら、硫酸をpHが１〜２になるまで滴下して、３時間攪拌した。セライトろ過を行い、濃縮後、メタノール／水を系中に入れ、析出した固体をろ取し、ヘキサンで再結晶を行い、白色固体の化合物４を１．１１ｇ得た。（収率２８．１％） Example 2
(Synthesis of Compound 4)

Using a four-necked flask, compound 2 (1.72 g, 10.00 mmol) and tetrahydrofuran (100 mL) were added, and argon bubbling was performed at room temperature for 30 minutes. After cooling to −78 ° C., lithium diisopropylamide (hexane suspension 10 w%, 49.1 mL, 30.0 mmol) was added, stirred for 20 minutes, trimethoxyborane (3.43 g, 33.0 mmol) was added, and the mixture was stirred for 1 hour. did. Next, 2,2-dimethyl-1,3-propanediol (4.17 g, 40.0 mmol) was added, and sulfuric acid was added dropwise until the pH reached 1 to 2 at room temperature, followed by stirring for 3 hours. Celite filtration was performed, and after concentration, methanol / water was put into the system. The precipitated solid was collected by filtration and recrystallized from hexane to obtain 1.11 g of compound 4 as a white solid. (Yield 28.1%)

¹ H-NMR (CDCl ₃ , δ (ppm)): 1.14 (s, 12H), 3.92 (s, 8H)
¹⁹ F-NMR (CDCl ₃ , δ (ppm)): -120 (s, 2F)

２ ５
１００ｍＬフラスコに、化合物２を２．００ｇ（１１．６ｍｍｏｌ）、鉄粉を０．２０ｇ（３．５８ｍｍｏｌ）入れ、フラスコを９０℃に加熱した。このフラスコに、臭素３１ｇ（１９４ｍｍｏｌ）を１時間かけて滴下した。滴下後、反応液を９０℃で３８時間攪拌した。その後、フラスコを室温（２５℃）まで冷却し、クロロホルム１００ｍＬを入れて希釈した。得られた溶液を、５ｗｔ％の亜硫酸ナトリウム水溶液３００ｍＬに注ぎ込み、１時間攪拌した。得られた混合液の有機層を分液ロートで分離し、水層をクロロホルムで３回抽出した。得られた抽出液を有機層に混合し、混合した溶液を硫酸ナトリウムで乾燥した。ろ過後、ろ液をエバポレーターで濃縮し、溶媒を留去した。得られた黄色の固体を、５５℃に熱したメタノール９０ｍＬに溶解させ、その後、２５℃まで冷却した。析出した結晶をろ過して回収し、その後、室温（２５℃）で減圧乾燥して化合物５を１．５０ｇ得た。 Comparative Example 1
(Synthesis of Compound 5)

2 5
In a 100 mL flask, 2.00 g (11.6 mmol) of Compound 2 and 0.20 g (3.58 mmol) of iron powder were placed, and the flask was heated to 90 ° C. To this flask, 31 g (194 mmol) of bromine was added dropwise over 1 hour. After the dropping, the reaction solution was stirred at 90 ° C. for 38 hours. Thereafter, the flask was cooled to room temperature (25 ° C.) and diluted with 100 mL of chloroform. The obtained solution was poured into 300 mL of 5 wt% aqueous sodium sulfite solution and stirred for 1 hour. The organic layer of the obtained mixture was separated with a separatory funnel, and the aqueous layer was extracted with chloroform three times. The obtained extract was mixed with the organic layer, and the mixed solution was dried over sodium sulfate. After filtration, the filtrate was concentrated with an evaporator and the solvent was distilled off. The obtained yellow solid was dissolved in 90 mL of methanol heated to 55 ° C., and then cooled to 25 ° C. The precipitated crystals were collected by filtration and then dried under reduced pressure at room temperature (25 ° C.) to obtain 1.50 g of compound 5.

５ ３
四つ口フラスコに、化合物５を１２．３０ｇ（３７．２８ｍｍｏｌ)、ビス（ピナコラート）ジボロンを２３．６７ｇ（９３．２０ｍｍｏｌ）、酢酸カリウムを９．１５ｇ（９３．２０ｍｍｏｌ）及び、ジオキサンを５００ｍＬ加え、室温(２５℃)で３０分間アルゴンバブリングを行った。反応溶液にジフェニルホスフィノフェロセンパラジウムジクロリドを１．５２ｇ（１．８６ｍｍｏｌ）、ジフェニルホスフィノフェロセンを１．０３ｍｇ（１．８６ｍｍｏｌ）加えた後、加熱還流を６０時間行った。還流後、液体クロマトグラフィーにより原料の消失を確認した。反応溶液をセライトろ過して不溶分を分離した後、ろ液を乾燥させて溶媒を除去し、褐色固体を得た。得られた褐色固体に、熱ヘキサン２００ｍＬを加えてろ過し、ろ液を乾燥させて溶媒を除去して粗結晶を得た。続いて、粗結晶をヘキサンで再結晶した。再結晶を２回行い、化合物３を３．１２ｇ得た。（化合物２からのトータル収率４．０％） (Synthesis of Compound 3)

5 3
To a four-necked flask, 12.30 g (37.28 mmol) of Compound 5, 23.67 g (93.20 mmol) of bis (pinacolato) diboron, 9.15 g (93.20 mmol) of potassium acetate, and 500 mL of dioxane were added. Then, argon bubbling was performed at room temperature (25 ° C.) for 30 minutes. After 1.52 g (1.86 mmol) of diphenylphosphinoferrocene palladium dichloride and 1.03 mg (1.86 mmol) of diphenylphosphinoferrocene were added to the reaction solution, the mixture was heated to reflux for 60 hours. After the reflux, disappearance of the raw material was confirmed by liquid chromatography. The reaction solution was filtered through Celite to separate insoluble matters, and then the filtrate was dried to remove the solvent to obtain a brown solid. To the obtained brown solid, 200 mL of hot hexane was added and filtered, and the filtrate was dried to remove the solvent to obtain crude crystals. Subsequently, the crude crystals were recrystallized from hexane. Recrystallization was performed twice to obtain 3.12 g of compound 3. (Total yield from compound 2: 4.0%)

¹ H-NMR (CDCl ₃ , δ (ppm)): 1.45 (s, 24H)
¹⁹ F-NMR (CDCl ₃ , δ (ppm)): -117 (s, 2F)

Claims (5)

A compound represented by the following formula (I) is reacted with a first intermediate obtained by reacting a lithium amide compound or an alkyllithium compound with a compound represented by the following formula (W2-1). Producing a second intermediate;

(I)
[In formula (I), Y represents a divalent group. ]

[In Formula (W2-1), R ¹ , R ² and R ³ each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R ² and R ³ are linked to each other, and An alkane cyclic structure having 1 to 10 carbon atoms may be formed together with the oxygen atom to which is bonded. ]
A method for producing a boron compound represented by the following formula (II), comprising a step of reacting the second intermediate with an alcohol or a divalent carboxylic acid.

(II)
[In formula (II), W represents a boric acid ester residue. Y represents the same meaning as described above. ] The alcohol is a compound represented by any one of the following formulas (W3-1) to (W3-8), and the divalent carboxylic acid is a compound represented by the following formula (W3-9). 2. The production method according to 1.

The production method according to claim 1 or 2, wherein the boric acid ester residue represented by W is a group represented by any of the following formulas (W4-1) to (W4-12).

The divalent group represented by Y is a group represented by any one of the following formulas (Y-1) to (Y-4). The production according to any one of claims 1 to 3. Method.

[In formula (Y-1) to formula (Y-4), R each independently represents a hydrogen atom, a halogen atom or a substituent. ]   The method according to any one of claims 1 to 4, wherein the lithium amide compound or the alkyl lithium compound is lithium diisopropylamide.