WO2011115102A1 - Phosphole compound, method for producing same, method for producing compound having intramolecular phosphole ring, compound having intramolecular phosphole ring, and application thereof - Google Patents

Abstract

Disclosed are: a phosphole compound useful in producing a compound having an intramolecular phosphole ring such as a polyphosphole; a method for producing same; a method for producing the compound having an intramolecular phosphole ring such as a polyphosphole; the compound having an intramolecular phosphole ring such as a polyphosphole; and an application thereof as a functional material. The phosphole compound useful in producing the compound having an intramolecular phosphole ring such as a polyphosphole is characterized by having a stannyl group at the α position. As a result, it is possible to easily produce the compound having an intramolecular phosphole ring such as a polyphosphole that can be used as a photofunctional material, an electron conductive material, or the like.

Description

Phosphor compound and method for producing the same, method for producing compound having phosphole ring in molecule, compound having phosphole ring in molecule and use thereof

The present invention relates to a phosphole compound and a method for producing the same, a method for producing a compound having a phosphole ring in the molecule, a compound having a phosphole ring in the molecule and use thereof.

Unsaturated hetero five-membered ring polymers (polyheteroals) having polymer structures bonded to each other at the α-position of heterocyclopentadiene are a kind of condensed polycyclic polymers, organic solar cells, organic field effect transistors, organic light emission It is expected as an optical functional material or an electronic conductive material used for a diode or the like (see, for example, Non-Patent Document 1). However, most of the polyheteroals reported so far are related to polypyrrole and polythiophene, and there are no reports on polyphospholes. Phosphole is a heterocyclic compound in which the pyrrole nitrogen is replaced by phosphorus, but the HOMO-LUMO gap is smaller than that of pyrrole, and the basicity of the lone pair on the pyrrole nitrogen is very small, whereas The basicity of unshared electron pairs on phosphorus is relatively large. Therefore, polyphosphole is an interesting material that can be a functional material different from polypyrrole and polythiophene, but the reason for nevertheless being reported is that there is no effective production method.

Therefore, the present invention provides a phosphole compound useful for the production of a compound having a phosphole ring such as polyphosphole in the molecule and a production method thereof, a method for producing a compound having a phosphole ring such as polyphosphole in the molecule, and a phosphole ring such as polyphosphole as a molecule. It aims at providing the use as a compound and its functional material which have in inside.

As a result of intensive studies in view of the above points, the present inventors have easily made a compound having a phosphole ring such as polyphosphole in the molecule using a phosphole compound having a stannyl group at the α-position as a key compound. I found.

The phosphole compound having a stannyl group at the α-position of the present invention based on the above knowledge is represented by the following general formula (1) as described in claim 1.

[Wherein R ¹ represents an alkyl group. X represents —SnR ² ₃ (R ² represents an alkyl group), an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an alkynyl which may have a substituent A group or an aryl group which may have a substituent. Y may optionally be interrupted by an oxygen atom, —S (O) ₁ — (wherein 1 represents an integer of 0 to 2), —NR ³ — (R ³ represents a hydrogen atom or an alkyl group), The alkylene group which may have a substituent is shown. Ar represents an aryl group which may have a substituent. ]
Moreover, the manufacturing method of the phosphole compound which has a stannyl group in (alpha) position of Claim 1 of this invention is a diyne compound represented by following General formula (2) as an organic transition metal compound as described in Claim 2. After the reaction, it is characterized by reacting with ArPU ₂ (U represents a halogen atom. Ar is as defined above) and further P-oxidizing.

[Wherein R ¹ , X and Y are as defined above. ]
In addition, the phosphole compound having a halogen atom at the α-position of the present invention is represented by the following general formula (3) as described in claim 3.

[Wherein, R ⁴ represents a halogen atom. Z is an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, Indicates one of halogen atoms. Y and Ar are as defined above. ]
In addition, the method for producing a phosphole compound having a halogen atom at the α-position according to claim 3 of the present invention includes the stannyl group possessed by the phosphole compound having a stannyl group at the α-position according to claim 1. It is characterized by being substituted with a halogen atom.
Moreover, the manufacturing method of the compound which has the phosphole ring in a molecule | numerator of this invention is the heterocyclic compound substituted by the phosphole compound which has the stannyl group in (alpha) position of Claim 1, and a halogen atom as described in Claim 5. It is characterized by being coupled in the presence of a metal catalyst.
Moreover, the compound which has the phosphole ring of this invention in a molecule | numerator is represented by following General formula (4) as Claim 6. It is characterized by the above-mentioned.

[In formula, T shows the heterocyclic ring which may have a substituent. n represents an integer of 1 to 25. Y and Ar are as defined above. ]
A compound having a phosphole ring in the molecule according to claim 7 is represented by the following general formula (5) in the compound having a phosphole ring in the molecule according to claim 6.

[Wherein, m represents an integer of 2 to 50. Y and Ar are as defined above. ]
In addition, the optical functional material of the present invention is characterized in that, as described in claim 8, it comprises a compound having the phosphor ring in claim 6 in the molecule.
Moreover, the electronic conductive material of this invention consists of a compound which has the phosphole ring of Claim 6 in a molecule | numerator as described in Claim 9.

According to the present invention, a phosphole compound useful for the production of a compound having a phosphole ring such as polyphosphole in the molecule and a production method thereof, a method for producing a compound having a phosphole ring such as polyphosphole in the molecule, and a phosphole ring such as polyphosphole. It is possible to provide a compound possessed in a molecule and its use as a functional material.

It is a UV / Vis absorption spectrum of a compound having in the molecule a phosphole ring of the present invention in the embodiment (in _CH 2 Cl _2).

The phosphole compound of the present invention useful for the production of a compound having a phosphole ring in the molecule, such as polyphosphole, is characterized by being represented by the following general formula (1) having a stannyl group at the α-position.

[Wherein R ¹ represents an alkyl group. X represents —SnR ² ₃ (R ² represents an alkyl group), an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an alkynyl which may have a substituent A group or an aryl group which may have a substituent. Y may optionally be interrupted by an oxygen atom, —S (O) ₁ — (wherein 1 represents an integer of 0 to 2), —NR ³ — (R ³ represents a hydrogen atom or an alkyl group), The alkylene group which may have a substituent is shown. Ar represents an aryl group which may have a substituent. ]

By coupling a phosphoryl compound having a stannyl group at the α-position represented by the above general formula (1) and a heterocyclic compound substituted with a halogen atom in the presence of a metal catalyst, the following general formula (4) A compound having a phosphole ring represented in the molecule can be produced. This coupling reaction can be performed using, for example, a Stille type reaction using a Pd catalyst (see, for example, Devreux, V. et al. J. Org. Chem. 2007, 72, 3783 if necessary). thing).

[In formula, T shows the heterocyclic ring which may have a substituent. n represents an integer of 1 to 25. Y and Ar are as defined above. ]

When a phosphole compound having a halogen atom at the α-position represented by the following general formula (3) is used as a heterocyclic compound substituted with a halogen atom, the following general formula (5 ) Can be produced.

[Wherein, R ⁴ represents a halogen atom. Z is an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, Indicates one of halogen atoms. Y and Ar are as defined above. ]

[Wherein, m represents an integer of 2 to 50. Y and Ar are as defined above. ]

In addition, after reacting the diyne compound represented by the following general formula (2) with the organic transition metal compound, the phosphole compound having a stannyl group at the α-position represented by the above general formula (1) is used to form ArPU _2. (U represents a halogen atom. Ar is as defined above) and further P-oxidized. As the organic transition metal compound, for example, an organic titanium compound can be used, and a phosphole ring can be formed by a cyclization reaction via a metallacyclopentadiene compound (for example, Matano, Y. et al. J if necessary). .Org.Chem.2006, 71, 5792). P-oxidation can be performed using, for example, hydrogen peroxide.

[Wherein R ¹ , X and Y are as defined above. ]

In addition, the phosphole compound having a halogen atom at the α-position represented by the general formula (3) is a halogenated stannyl group possessed by the phosphole compound having a stannyl group at the α-position represented by the general formula (1). It can be produced by substituting atoms. When the halogen atom is an iodine atom, this reaction can be performed using, for example, N-iodosuccinimide (NIS).

In the above, the alkyl group in R ¹ , R ² , R ^{3 and} the alkyl group of the alkyl group which may have a substituent in X, Z are, for example, straight chain or branched groups having 1 to 20 carbon atoms. Branched or cyclic, specifically methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, hexyl, cyclohexyl Group, octyl group, decyl group, dodecyl group, tetradecyl group, hexadecyl group, octadecyl group and the like. The alkenyl group of the alkenyl group which may have a substituent in X and Z is, for example, a linear or branched group having 2 to 10 carbon atoms, specifically vinyl group, allyl group, butenyl group. Group, 2-methyl-1-propenyl group, 2-methyl-2-propenyl group, 1-methyl-1-propenyl group and the like. Examples of the alkynyl group of the alkynyl group which may have a substituent in X and Z include, for example, a straight chain or branched chain group having 2 to 10 carbon atoms, such as an ethynyl group or a 1-propynyl group. 2-propynyl group, 1-butynyl group, 2-butynyl group, 3-butynyl group and the like. Examples of the aryl group that may have a substituent in X, Ar, and Z include a phenyl group and a naphthyl group. Optionally interrupted by an oxygen atom in Y, —S (O) ₁ — (wherein 1 represents an integer from 0 to 2), —NR ³ — (wherein R ³ represents a hydrogen atom or an alkyl group), The alkylene group of the alkylene group which may have a substituent is a straight chain or branched chain group having 2 to 6 carbon atoms, specifically an ethylene group, trimethylene group, 2-methyltrimethylene group. , Tetramethylene group, 2-methyltetramethylene group, 2-ethyltetramethylene group and the like. Examples of the halogen atom in U, R ⁴ and Z include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom. The heterocyclic ring which may have a substituent for T is a 5-membered or 6-membered ring containing N, O, P, S or the like as a hetero atom, specifically a pyrrole ring, furan And a ring, a thiophene ring, a thiazole ring, an isothiazole ring, an oxazole ring, an isoxazole ring, a pyrazole ring, an imidazole ring, a pyridine ring, a pyridazine ring, a pyrimidine ring, a pyrazine ring, and a phosphole ring.

An alkyl group, an alkenyl group or an alkynyl group in X and Z, an optionally substituted oxygen atom in Y, —S (O) ₁ — (l represents an integer of 0 to 2), —NR ^The substituent which the alkylene group which may be interrupted by ^3- (R ³ represents a hydrogen atom or an alkyl group) may have a halogen atom such as a fluorine atom, a chlorine atom, a bromine atom or an iodine atom Hydroxyl group, nitro group, amino group, monoalkylamino group, dialkylamino group, alkylcarbonyl group, alkoxycarbonyl group, alkoxy group, formyl group, cyano group, carboxy group, carbonyl group, carbamoyl group, alkylcarbamoyl group, alkylsulfonyl Group, arylsulfonyl group, alkoxysulfonyl group, sulfamoyl group, alkylsulfamoyl group Sulfanyl group, a sulfino group, a sulfo group, a dialkyl phosphoryl group, diarylphosphoryl group, dialkoxy phosphoryl group, such as diamino phosphoryl group. As the substituent that the aryl group in X, Ar, and Z may have and the substituent that the heterocyclic ring in T may have, in addition to the above-described substituents, For example, a linear, branched or cyclic alkyl group, aryl group or heteroaryl group having 1 to 20 carbon atoms may be mentioned. In addition, two adjacent substituents are optionally combined to form an oxygen atom, —S (O) ₁ — (l represents an integer of 0 to 2), —NR ³ — (R ³ is a hydrogen atom or an alkyl group) And an alkylene group which may have a substituent may be formed. In some cases, the substituent may be in a form protected with a protecting group known per se. In addition, when the number of substituents is two or more, they may be the same substituent or different substituents.

The compound having a phosphole ring represented by the general formula (4) in the molecule is used as a photofunctional material or an electronic conductive material used for an organic solar cell, an organic field effect transistor, an organic light emitting diode, or the like. Can do. The optical properties and electrochemical properties are derived from the phosphole ring in the molecule and are different from those of polypyrrole and polythiophene, and are expected as new functional materials that have never existed before.

Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not construed as being limited to the following description.

Example 1: Synthesis of a phosphole compound having a stannyl group at the α-position of the present invention (A) Synthesis of 1-phenyl-7-tributylstannyl-1,6-heptadiyne (1) Synthesis was performed according to the following method.

NBuLi (1.65 M, 10.6 mL, 17.5 mmol) was slowly added to a THF solution (88 mL) of 1-phenyl-1,6-heptadiyne (2.93 g, 17.4 mmol) at −78 ° C. After stirring at −78 ° C. for 1 hour, Bu ₃ SnCl (4.8 mL, 18 mmol) was added and the resulting mixture was stirred at room temperature for 2 hours. Then water was added and the aqueous layer was extracted 3 times with Et ₂ O. The extracts were combined, washed with brine, and dried over Na ₂ SO ₄ . The target compound 1 was obtained as a pale yellow oil by removing volatile components under reduced pressure (8.13 g, 100%). This compound 1 was subjected to the next step without further purification.
¹ H NMR (400 MHz, CDCl ₃ ): δ 0.91 (t, J = 7.3 Hz, 9H; Me), 0.97 (pseudo t, J = 8.0 Hz, 6H; SnCH ₂ ), 1.34 (sextet, J = 7.3 Hz , 6H; SnCH ₂ CH ₂ C H ₂ ), 1.53-1.60 (m, 6H; SnCH ₂ C H ₂ ), 1.82 (quintet, J = 7.1 Hz, 2H; C≡CCH ₂ C H ₂ ), 2.43 (t , J = 7.1 Hz, 2H; C≡CCH ₂ ), 2.54 (t, J = 7.1 Hz, 2H; C≡CCH ₂ ), 7.26-7.30 (m, 3H; Ph), 7.37-7.40 (m, 2H; Ph); ¹³ C NMR (75 MHz, CDCl ₃ ): δ 11.0, 13.7, 18.5, 19.4, 27.0, 28.3, 28.9, 81.0, 82.4, 89.4, 110.6, 123.9, 127.5, 128.1, 131.5.

(B) Synthesis of 1,7-bis (tributylstannyl) -1,6-heptadiyne (2) Synthesized according to the following method.

NBuLi (1.57 M, 38 mL, 60 mmol) was slowly added to a THF solution (150 mL) of 1,6-heptadiyne (3.4 mL, 30 mmol) at −78 ° C. After stirring at −78 ° C. for 1 hour, Bu ₃ SnCl (16.4 mL, 60.0 mmol) was added, and the resulting mixture was stirred at room temperature for 2 hours. Then water was added and the aqueous layer was extracted 3 times with Et ₂ O. The extracts were combined, washed with brine, and dried over Na ₂ SO ₄ . The target compound 2 was obtained as a pale yellow oil by removing volatile components under reduced pressure (20.4 g, 100%). This compound 2 was subjected to the next step without further purification.
¹ H NMR (400 MHz, CDCl ₃ ): δ 0.90 (t, J = 7.3 Hz, 18H; Me), 0.95 (pseudo t, J = 8.0 Hz, 12H; SnCH ₂ ), 1.33 (sextet, J = 7.3 Hz , 12H; SnCH ₂ CH ₂ C H ₂ ), 1.51-1.59 (m, 12H; SnCH ₂ C H ₂ ), 1.72 (quintet, J = 7.1 Hz, 2H; C≡CCH ₂ C H ₂ ), 2.36 (t , J = 7.1 Hz, 4H; C≡CCH ₂ ); ¹³ C NMR (75 MHz, CDCl ₃ ): δ 10.9, 13.6, 19.3, 26.9, 28.8, 68.5, 81.9, 110.8.

(C) Synthesis of 2-phenyl-5-tributylstannylphosphole (3) The compound was synthesized according to the following method.

To an Et ₂ O solution (65 mL) containing Compound 1 (1.96 g, 4.28 mmol) and Ti (Oi-Pr) ₄ (1.26 mL, 4.30 mmol) at −70 ° C., i-PrMgCl (2.0 M, 4.3 mL, 8.6 mmol) was added and the resulting mixture was stirred at −50 ° C. After 3 hours, PhPCl ₂ (0.58 mL, 4.3 mmol) was added to the solution, and the resulting mixture was stirred at 0 ° C. for 1 hour and then at room temperature for 3 hours. Saturated aqueous NH ₄ Cl solution was then added and the mixture was filtered through a celite bed. The organic layer was separated and the aqueous layer was extracted with EtOAc. The extract was evaporated and the oily residue was dissolved in CH ₂ Cl ₂ (ca. 20 mL). To this solution was added H ₂ O ₂ (30 wt%, 0.5 mL, 4.4 mmol). After stirring for 20 minutes at room temperature, water was added and the organic layer was separated. The aqueous layer was extracted 3 times with CH ₂ Cl ₂ . The extracts were combined, dried over Na ₂ SO ₄ and then evaporated under reduced pressure. The residue was subjected to silica gel column chromatography (hexane / CH ₂ Cl ₂ = 4/1 → CH ₂ Cl ₂ / acetone = 20/1) to obtain the target compound 3 as a pale yellow solid (1.40 g, 56%).
Mp 77-79 ° C; ¹ H NMR (400 MHz, CDCl ₃ ): δ 0.83 (t, J = 7.3 Hz, 9H; Me), 0.87-0.99 (m, 6H; SnCH ₂ ), 1.21 (sextet, J = 7.1 Hz, 6H; SnCH ₂ CH ₂ C H ₂ ), 1.27-1.45 (m, 6H; SnCH ₂ C H ₂ ), 1.98-2.28 (m, 2H; C = CCH ₂ C H ₂ ), 2.50-2.69 ( m, 2H; C = CCH ₂ ), 2.78-2.96 (m, 2H; C = CCH ₂ ), 7.16 (t, J = 7.6 Hz, 1H; Ph), 7.26 (t, J = 7.6 Hz, 2H; Ph ), 7.32-7.36 (m, 2H; PPh), 7.39-7.42 (m, 1H; PPh), 7.60 (d, J = 7.6 Hz, 2H; Ph), 7.72 (dd, J = 6.8, 11.2 Hz, 2H ; PPh); ¹³ C NMR (100 MHz, CDCl ₃ ): δ 10.0 (d, ³ J (P, C) = 2.5 Hz), 13.6, 26.0 (d, ⁴ J (P, C) = 2.5 Hz), 27.2, 29.0, 29.7 (d, ³ J (P, C) = 13.2 Hz), 31.4 (d, ³ J (P, C) = 19.8 Hz), 127.3 (d, J (P, C) = 50.4 Hz) , 127.6 (d, J (P, C) = 37.2 Hz), 127.7, 128.5 (d, J (P, C) = 3.3 Hz), 128.6 (d, J (P, C) = 8.3 Hz), 130.4 ( d, ³ J (P, C) = 9.9 Hz), 131.2 (d, ¹ J (P, C) = 86.0 Hz), 131.3 (d, J (P, C) = 3.3 Hz), 131.9 (d, ¹ J (P, C) = 88.4 Hz), 133.5 (d, J (P, C) = 13.2 Hz), 153.8 (d, ² J (P, C) = 36.4 Hz), 171.3 (d, J (P, C) = 13.2 Hz); ³¹ P NMR (162 MHz, CD ₂ Cl ₂ ): δ 64.9 ( ² J (Sn, P) = 122 Hz); HRMS (EI): calcd.for C ₃₁ H ₄₃ OP ¹²⁰ Sn: 582.2073, found: m / z 582.2051 [M ⁺ ]; IR (KBr): ν _max 1187 (P = O) cm ^-1 .

(D) Synthesis of 2,5-bis (tributylstannyl) phosphole (4a) Synthesized according to the following method.

To an Et ₂ O solution (190 mL) containing Compound 2 (6.70 g, 10.0 mmol) and Ti (Oi-Pr) ₄ (2.9 mL, 9.9 mmol) at −70 ° C., i-PrMgCl (2.0 M, 10 mL, 20 mmol) was added and the resulting mixture was stirred at −50 ° C. After 2 hours, PhPCl ₂ (1.4 mL, 10 mmol) was added to the solution, and the resulting mixture was stirred at 0 ° C. for 1 hour and then at room temperature for 2 hours. Saturated aqueous NH ₄ Cl solution was then added and the mixture was filtered through a celite bed. The organic layer was separated and the aqueous layer was extracted with EtOAc. The extract was evaporated and the oily residue was dissolved in CH ₂ Cl ₂ (ca. 100 mL). To this solution was added H ₂ O ₂ (30 wt%, 1.7 mL, 15 mmol). After stirring for 20 minutes at room temperature, water was added and the organic layer was separated. The aqueous layer was extracted 3 times with CH ₂ Cl ₂ . The extracts were combined, dried over Na ₂ SO ₄ and then evaporated under reduced pressure. The residue was subjected to silica gel (neutral) column chromatography (CH ₂ Cl ₂ → CH ₂ Cl ₂ / acetone = 20/1) to obtain the target compound 4a as a pale yellow oil (1.75 g, 22% ).
¹ H NMR (400 MHz, CDCl ₃ ): δ 0.81 (t, J = 7.3 Hz, 18 H; Me), 0.83-0.94 (m, 12H; SnCH ₂ ), 1.18 (sextet, J = 7.3 Hz, 12H; SnCH ₂ CH ₂ C H ₂ ), 1.23-1.40 (m, 12H; SnCH ₂ C H ₂ ), 1.89-2.15 (m, 2H; C = CCH ₂ C H ₂ ), 2.45-2.65 (m, 4H; C = CCH ₂ ), 7.31-7.36 (m, 2H; PPh), 7.39-7.43 (m, 1H; PPh), 7.62-7.57 (m, 2H; PPh); ¹³ C NMR (100 MHz, CDCl ₃ ): δ 9.8 (d, ³ J (P, C) = 1.6 Hz), 13.6, 25.3 (d, ⁴ J (P, C) = 2.5 Hz), 27.2, 29.1, 30.6 (d, ³ J (P, C) = 6.2 Hz), 128.3 (d, ² J (P, C) = 10.7 Hz), 130.5 (d, ³ J (P, C) = 9.1 Hz), 130.8 (d, ⁴ J (P, C) = 2.5 Hz ), 131.1 (d, ¹ J (P, C) = 124.0 Hz), 133.1 (d, ¹ J (P, C) = 43.0 Hz), 170.2 (d, ² J (P, C) = 22.3 Hz); ³¹ P NMR (162 MHz, CDCl ₃ ): δ 78.2 ( ² J (Sn, P) = 116 Hz); HRMS (FAB): calcd.for C ₃₇ H ₆₅ OP ¹¹⁶ Sn ¹¹⁸ Sn: 790.2807, found: m / z 790.2830 [M ⁺ ]; IR (KBr): ν _max 1186 (P = O) cm ^-1 . Anal.calcd.for C ₃₇ H ₆₅ OPSn ₂ : C, 55.95; H, 8.25. Found: C, 56.12; H, 8.21.

(E) Synthesis of dichloro (4-dodecyloxyphenyl) phosphine Synthesized according to the following method.

NBuLi (1.65 M, 18 mL, 30 mmol) was added to an Et ₂ O solution (62 mL) of 4-dodecyloxybromobenzene (10.3 g, 30.0 mmol) at 0 ° C., and the resulting mixture was added at room temperature. Stir for 1 hour. The resulting solution was cooled to −78 ° C., and chlorobis (diethylamino) phosphine (6.4 mL, 30 mmol) was added. After stirring at room temperature for 3.5 hours, HCl (2.0 M, 60 mL, 120 mmol) was added at −78 ° C., and the resulting suspension was stirred at room temperature for 19 hours. The white precipitate was removed by filtration, and the resulting ether solution containing the crude product (ca. 150 mL) was subjected to the next step without further purification.

(F) Synthesis of 1-dodecyloxyphenyl-2,5-bis (tributylstannyl) phosphole (4b) Synthesized according to the following method.

To an Et ₂ O solution (450 mL) containing Compound 2 (20.4 g, 30.4 mmol) and Ti (Oi-Pr) ₄ (8.8 mL, 30 mmol) at −70 ° C., i-PrMgCl (2.0 M, 30 mL, 60 mmol) was added and the resulting mixture was stirred at −50 ° C. for 2 hours. After adding an ether solution (150 mL) of dichloro (4-dodecyloxyphenyl) phosphine (ca. 30 mmol), the mixture was stirred at 0 ° C. for 1 hour and then at room temperature for 3.5 hours. Saturated aqueous NH ₄ Cl solution was added and the resulting mixture was filtered through a celite bed. The organic layer was separated and the aqueous layer was extracted with EtOAc. The extract was evaporated and the oily residue was dissolved in CH ₂ Cl ₂ (ca. 100 mL). To this solution was added H ₂ O ₂ (30 wt%, 5.0 mL, 44 mmol). After stirring for 20 minutes at room temperature, water was added and the organic layer was separated. The aqueous layer was extracted 3 times with CH ₂ Cl ₂ . The extracts were combined, dried over Na ₂ SO ₄ and then evaporated under reduced pressure. The residue was subjected to silica gel (neutral) column chromatography (CH ₂ Cl ₂ / hexane = 7/1 → CH ₂ Cl ₂ ) to obtain the target compound 4b as a light yellow oil (1.76 g, 1, 6% from 6-heptadiyne).
¹ H NMR (400 MHz, CD ₂ Cl ₂ ): δ 0.82 (t, J = 7.3 Hz, 18H; SnCH ₂ CH ₂ CH ₂ C H ₃ ), 0.86-0.94 (m, 15H; dodecyl-Me + SnCH ₂ ), 1.20 (sextet, J = 7.2 Hz, 12H; SnCH ₂ CH ₂ C H ₂ ), 1.27-1.34 (m, 30H; dodecyl-CH ₂ + SnCH ₂ CH ₂ C H ₂ ), 1.76 (quintet, J = 6.9 Hz, 2H; OCH ₂ C H ₂ ), 1.91-2.14 (m, 2H; C = CCH ₂ CH ₂ ), 2.45-2.63 (m, 4H; C = CCH ₂ ), 3.95 (t, J = 6.3 Hz , 2H; OCH ₂ ), 6.85 (dd, J = 1.5, 8.8 Hz, 2H; PPh), 7.50 (dd, J = 8.8, 9.8 Hz, 2H; PPh); ¹³ C NMR (100 MHz, CDCl ₃ ): δ 9.8 (d, ³ J (P, C) = 1.6 Hz), 13.6, 14.1, 22.7, 25.3 (d, ⁴ J (P, C) = 1.7 Hz), 26.0, 27.3, 29.0, 29.2, 29.4, 29.4 , 29.6, 29.6, 29.6, 29.7, 30.6 (d, ³ J (P, C) = 6.2 Hz), 31.9, 68.0, 114.4 (d, ² J (P, C) = 11.6 Hz), 121.6 (d. ¹ J (P, C) = 90.1 Hz), 132.2 (d, ³ J (P, C) = 10.7 Hz), 133.2 (d, ¹ J (P, C) = 43.8 Hz), 161.5 (d, ⁴ J ( P, C) = 2.5 Hz), 169.7 (d, ² J (P, C) = 22.3 Hz); ³¹ P NMR (162 MHz, CDCl ₃ ): δ 78.7 ( ² J (Sn, P) = 116 Hz) HRMS (FAB): calcd.for C ₄₉ H ₈₉ O ₂ P ¹²⁰ Sn ₂ : 980.4644, found: m / z 980.4655 [M ⁺ ]; IR (KBr ): ν _max 1174 (P = O) cm ^-1 .

Example 2: Synthesis of a phosphole compound having a halogen atom at the α-position of the present invention (A) Synthesis of 1-iodo-5-phenylphosphole (5) Synthesis was performed according to the following method.

A solution of NIS 3 (266 mg, 1.18 mmol) in CH ₂ Cl ₂ (30 mL) / MeCN (5 mL) was added to a solution of compound 3 (582 mg, 1.00 mmol) in CH ₂ Cl ₂ (10 mL) at −78 ° C. It was dripped. The reaction mixture was stirred at −78 ° C. for 15 minutes and then stirred at room temperature for 30 minutes. The obtained mixture was subjected to silica gel column chromatography (CH ₂ Cl ₂ → CH ₂ Cl ₂ / acetone = 20/1) to give the target compound 5 as a yellow solid (411 mg, 98%).
Mp 175 ° C (dec); ¹ H NMR (400 MHz, CDCl ₃ ): δ 2.07-2.29 (m, 2H; C = CCH ₂ C H ₂ ), 2.40-2.61 (m, 2H; C = CCH ₂ ), 2.95-3.09 (m, 2H; C = CCH ₂ ), 7.21-7.32 (m, 3H; Ph), 7.42 (dt, 2H, J = 2.9 Hz, 7.6 Hz; PPh), 7.51 (t, 1H, J = 6.8 Hz; PPh), 7.58 (d, 2H, J = 7.8 Hz; Ph), 7.75 (dd, 2H, J = 6.8 Hz, 12.2 Hz; PPh); ¹³ C NMR (100 MHz, CDCl ₃ ): δ 25.0 , 31.2 (d, ³ J (P, C) = 12.4 Hz), 31.4 (d, ³ J (P, C) = 9.9 Hz), 79.1 (d, ¹ J (P, C) = 95.1 Hz), 127.8 (d, ³ J (P, C) = 6.6 Hz), 128.1, 128.4 (d, ¹ J (P, C) = 86.8 Hz), 128.8, 129.0 (d, ² J (P, C) = 12.4 Hz) , 129.8 (d, ¹ J (P, C) = 96.7 Hz), 130.9 (d, ³ J (P, C) = 9.9 Hz), 132.4 (d, ⁴ J (P, C) = 2.5 Hz), 133.0 (d, ² J (P, C) = 12.4 Hz), 154.5 (d, ² J (P, C) = 24.0 Hz), 166.7 (d, ² J (P, C) = 27.3 Hz); ³¹ P NMR (162 MHz, CD ₂ Cl ₂ ): δ 51.5; HRMS (EI): calcd.for C ₁₉ H ₁₆ OPI: 417.9983, found: m / z 417.9984 [M ⁺ ]; IR (KBr): ν _max 1190 (P = O) cm ^-1 . Anal.calcd.for C ₁₉ H ₁₆ OPI: C, 54.57; H, 3.86.Found: C, 54.32; H, 3.92.

(B) Synthesis of 2,5-diiodophosphole (6a) Synthesized according to the following method.

A CH ₂ Cl ₂ (45 mL) / MeCN (8 mL) solution of NIS (498 mg, 2.21 mmol) in a CH ₂ Cl ₂ solution (18 mL) of compound 4a (716 mg, 0.90 mmol) at −78 ° C. It was dripped. The reaction mixture was stirred at −78 ° C. for 15 minutes and then stirred at room temperature for 30 minutes. The obtained mixture was subjected to silica gel column chromatography (CH ₂ Cl ₂ → CH ₂ Cl ₂ / acetone = 20/1) to obtain the target compound 6a as a pale yellow solid (380 mg, 90%) .
Mp 130 ° C (dec); ¹ H NMR (400 MHz, CDCl ₃ ): δ 2.05-2.25 (m, 2H; C = CCH ₂ C H ₂ ), 2.48-2.68 (m, 4H; C = CCH ₂ ), 7.50 (dt, 2H, J = 3.1 Hz, J = 7.6 Hz; PPh), 7.59-7.63 (m, 1H; PPh), 7.69-7.74 (m, 2H; PPh); ¹³ C NMR (100 MHz, CDCl ₃ ): δ 23.4 (d, ⁴ J (P, C) = 1.7 Hz), 32.5 (d, ³ J (P, C) = 9.9 Hz), 79.2 (d, ¹ J (P, C) = 95.6 Hz) , 125.6 (d, ¹ J (P, C) = 103.3 Hz), 129.1 (d, ² J (P, C) = 13.2 Hz), 131.3 (d, ³ J (P, C) = 10.7 Hz), 133.0 (d, ⁴ J (P, C) = 3.3 Hz), 166.8 (d, ² J (P, C) = 24.8 Hz); ³¹ P NMR (162 MHz, CD ₂ Cl ₂ ): δ 48.4; HRMS (EI ): calcd.for C ₁₃ H ₁₁ OPI ₂ : 467.8637, found: m / z 467.8640 [M ⁺ ]; IR (KBr): ν _max 1203 (P = O) cm ^-1 .

(C) Synthesis of 1-dodecyloxyphenyl-2,5-diiodophosphole (6b) Synthesized according to the following method.

A solution of compound 4b (145 mg, 0.15 mmol) in CH ₂ Cl ₂ (3.0 mL) at −78 ° C. with NIS (83 mg, 0.37 mmol) in CH ₂ Cl ₂ (7.5 mL) / MeCN (1.4 mL) was added. It was dripped. The reaction mixture was stirred at −78 ° C. for 15 minutes and then stirred at room temperature for 40 minutes. The obtained mixture was subjected to silica gel column chromatography (CH ₂ Cl ₂ / hexane = 7/1 → CH ₂ Cl ₂ / acetone = 20/1) to obtain the target compound 6b as an off-white solid ( 85 mg, 89%).
Mp 115-117 ° C; ¹ H NMR (400 MHz, CDCl ₃ ): δ 0.88 (t, J = 6.8 Hz, 3H; Me), 1.27-1.49 (m, 18H; dodecyl-CH ₂ ), 1.79 (quintet, J = 7.0 Hz, 2H; OCH ₂ C H ₂ ), 2.04-2.23 (m, 2H; C = CCH ₂ C H ₂ ), 2.47-2.66 (m, 4H; C = CCH ₂ ), 4.00 (t, J = 6.6 Hz, 2H; OCH ₂ ), 6.98 (dd, J = 2.4, 9.1 Hz, 2H; PPh), 7.58 (dd, J = 9.1, 12.2 Hz, 2H; PPh); ¹³ C NMR (100 MHz, CDCl ₃ ): δ 14.1, 22.7, 23.4, 26.0, 29.1, 29.3, 29.6, 29.6, 29.6, 29.7, 31.9, 32.5 (d, ³ J (P, C) = 9.9 Hz), 68.2, 79.7 (d, ¹ J (P, C) = 93.4 Hz), 115.2 (d, ² J (P, C) = 14.0 Hz), 115.5 (d, ¹ J (P, C) = 110.8 Hz), 133.2 (d, ³ J (P , C) = 11.6 Hz), 163.1 (d, ⁴ J (P, C) = 2.5 Hz), 166.2 (d, ² J (P, C) = 24.8 Hz); ³¹ P NMR (162 MHz, CDCl ₃ ) : δ 49.8; HRMS (FAB) : calcd for C 25 H 35 I 2 O 2 P: 652.0464, found: m / z 652.0461 [M +]; IR (KBr): ν max 1179 (P = O) cm -. ^1. Anal. Calcd. For C ₂₅ H ₃₅ I ₂ O ₂ P: C, 46.03; H, 5.41. Found: C, 45.96; H, 5.18. (One of the carbon atoms of the dodecyloxy group due to peak overlap. Cannot be detected)

Also synthesized by the following method.

A CH ₂ Cl ₂ solution (1.0 mL) of compound 4b (194 mg, ca. 0.19 mmol) in CH ₂ Cl ₂ (2.0 mL) / MeCN (1.0 mL) of NIS (110 mg, 0.489 mmol) at −78 ° C. The solution was added dropwise. After stirring at −78 ° C. for 20 minutes, the mixture was stirred at room temperature for 15 minutes, and water was added to separate the organic layer. The aqueous layer was extracted 3 times with CH ₂ Cl ₂ . The extracts were combined, dried over Na ₂ SO ₄ and then evaporated under reduced pressure. The residue was subjected to silica gel column chromatography (CH ₂ Cl ₂ / hexane = 7/1 → CH ₂ Cl ₂ / acetone = 20/1), and the light yellow fraction was collected and evaporated. The desired compound 6b was obtained as an off-white solid (43 mg, 34% from compound 2) by reprecipitation of the residue from CH ₂ Cl ₂ / hexane.

Also synthesized by the following method.

A CH ₂ Cl ₂ solution (3.0 mL) of I ₂ (123 mg, 0.484 mmol) was added dropwise at 0 ° C. to a CH ₂ Cl ₂ solution (1.0 mL) of compound 4b (194 mg, ca. 0.19 mmol). After stirring at room temperature for 1 hour, the reaction mixture was washed with dilute aqueous Na ₂ S ₂ O ₃ solution and water. The organic layer was dried over Na ₂ SO ₄ and then evaporated under reduced pressure. The residue was subjected to silica gel column chromatography (CH ₂ Cl ₂ / hexane = 7/1 → CH ₂ Cl ₂ / acetone = 20/1), and the light yellow fraction was collected and evaporated. The residue was washed with hexane to obtain the target compound 6b as an off-white solid (46 mg, 36% from compound 2).

Example 3: Synthesis of a compound having a phosphole ring of the present invention in the molecule (A) Synthesis of α, α'-biphosphole (7) The compound was synthesized according to the following method.

A mixture of Pd ₂ (dba) ₃ (94 mg, 0.10 mmol), (2-furyl) ₃ P (49 mg, 0.21 mmol) and NMP (5.0 mL) was stirred at room temperature for 1 hour. To this mixture, compound 3 (578 mg, 1.00 mmol), compound 5 (432 mg, 1.00 mmol), CuI (193 mg, 1.00 mmol), and NMP (15.0 mL) were added. The resulting mixture was stirred at room temperature for 2.5 hours before cold EtOAc was added. The precipitate was removed by filtration and CHCl ₃ was injected. Insoluble material was removed by filtration through a celite bed, and the filtrate was evaporated to obtain a solid. The solid residue was reprecipitated from CHCl ₃ / hexane to give the target compound 7 as an orange solid (495 mg, 85%; mixture of diastereomers). In the following spectral data, each assignment of diastereomers is indicated by A and B.
TLC (CH ₂ Cl ₂ / acetone = 7/1): R _f = 0.30 (A), 0.51 (B) .Mp 275 ° C (dec); ¹ H NMR (600 MHz, CD ₂ Cl ₂ ): δ 1.78- 1.85 (m, 2H; A), 1.90-1.98 (m, 2H; B), 2.07-2.18 (m, 2H; A, 2H; B), 2.39-2.48 (m, 2H; A, 2H; B), 2.60-2.66 (m, 2H; A), 2.69-2.77 (m, 4H; B), 2.86 (dd, J = 7.7, 18.2 Hz, 2H; A), 3.19-3.25 (m, 2H; B), 3.64 (dd, J = 7.7, 18.2 Hz, 2H; A), 7.17-7.21 (m, 2H; A, 2H; B), 7.26-7.32 (m, 8H; A, 4H; B), 7.42-7.49 (m , 2H; A, 6H; B), 7.50-7.54 (m, 4H; A), 7.56 (d, J = 7.4 Hz, 4H; B), 7.59 (d, J = 7.7 Hz, 4H; A), 7.83 -7.86 (m, 4H; B); ¹³ C NMR (100 MHz, Cl ₂ CDCDCl ₂ ): δ 27.6, 28.0, 31.6 (t, J (C, P) = 5.8 Hz), 31.8 (t, J (C , P) = 5.8 Hz), 33.3 (t, J (C, P) = 5.8 Hz), 33.8 (t, J (C, P) = 5.8 Hz), 122.9 (d, J (C, P) = 105 Hz), 123.0 (d, J (C, P) = 104 Hz), 127.2, 128.2, 129.2 (t, J (C, P) = 3.3 Hz), 129.4, 129.5, 130.3, 130.3, 130.5 (t, J (C, P) = 5.8 Hz), 130.7 (t, J (C, P) = 5.8 Hz), 131.1, 131.5, 132.0 (t, J (C, P) = 5.0 Hz), 132.2 (t, J ( C, P) = 5.0 Hz), 133.4, 133.6, 134.4, 134.4, 134.5, 134.5, 156.6, 1 56.8, 156.8, 156.9, 157.2, 157.3, 157.4, 161.6, 161.7, 161.8, 161.9, 161.9, 162.0; ³¹ P NMR (162 MHz, CDCl ₃ ): δ 54.0 (A), 55.1 (B); HRMS (EI) : calcd. for C ₃₈ H ₃₂ O ₂ P ₂ : 582.1878, found: m / z 582.1880 [M ⁺ ]; IR (KBr): ν _max 1184 (P = O) cm ^-1 . The carbon atom of compound 7 cannot be completely assigned)

(B) Synthesis of α, α′-terphosphole (8) Synthesized according to the following method.

A mixture of Pd ₂ (dba) ₃ (18.5 mg, 0.0202 mmol), (2-furyl) ₃ P (9.7 mg, 0.042 mmol) and NMP (1.0 mL) was stirred at room temperature for 1 hour. To this mixture, an NMP solution (1.0 mL) of compound 5 (97.6 mg, 0.233 mmol), CuI (43.9 mg, 0.231 mmol), and compound 4a (76.6 mg, 0.0964 mmol) was added. After the resulting mixture was stirred at room temperature for 5 hours, EtOAc was added and saturated aqueous NH ₄ Cl solution was added. Insoluble material was removed by filtration through a celite bed. The organic layer was separated, washed twice with saturated aqueous NH ₄ Cl solution, washed twice with brine, dried over Na ₂ SO ₄ and evaporated. The residue was subjected to silica gel column chromatography (EtOAc / CHCl ₃ = 1/1 → EtOAc / MeOH = 20/1), and the red fraction was collected and evaporated. The solid residue was reprecipitated from CH ₂ Cl ₂ / hexane to give the target compound 8 as a dark red solid (32 mg, 41%; mixture of diastereomers). In the following spectral data, each assignment of diastereomers is indicated by A, B, and C.
Mp 160 ° C (dec); ¹ H NMR (400 MHz, CD ₂ Cl ₂ ): δ 1.56-3.61 (m, 18H), 7.14-7.80 (m, 25H); ³¹ P NMR (243 MHz, CDCl ₃ ): δ 52.1 (t, J (P, P) = 30.9 Hz, 1P; A), 53.8 (pseudo t, J (P, P) = 30.9 Hz, 1P; B), 53.9 (d, J (P, P) = 30.9 Hz, 2P; A), 54.7 (pseudo d, J (P, P) = 30.6 Hz, 2P; C), 54.8 (d, J (P, P) = 30.9 Hz, 1P; B), 55.0 ( d, J (P, P) = 33.8 Hz, 1P; B), 55.4 (dd, J (P, P) = 28.2, 36.4 Hz, 1P; C); HRMS (FAB): calcd.for C ₅₁ H ₄₃ O ₃ P ₃ : 796.2425, found: m / z 796.2418 [M ⁺ ]; IR (KBr): ν _max 1190 (P = O) cm ⁻¹ (high S / N ratio of compound 8 due to low solubility) ¹³ C { ¹ H} NMR spectrum cannot be obtained)

Note that mass spectrometry of the residue on the silica gel revealed that the above reaction also produced quarterphosphole (S1) represented by the following chemical structural formula (isolation and purification not possible). The absorption maximum wavelength (λ _max ) in CH ₂ Cl ₂ of the crude product of this compound was 541 nm.

(C) Synthesis of α, α'-polyphosphole (9) Synthesized according to the following method.

A mixture of Pd ₂ (dba) ₃ (9.2 mg, 0.010 mmol), (2-furyl) ₃ P (4.9 mg, 0.021 mmol) and NMP (0.5 mL) was stirred at room temperature for 1 hour. To this mixture was added NMP solution (2.0 mL) of CuI (47.2 mg, 0.250 mmol), compound 6b (65.8 mg, 0.100 mmol), compound 4b (96.4 mg, 0.099 mmol) and compound 3 (3.1 mg, 0.0053 mmol). Added. After stirring at room temperature for 49 hours, the resulting mixture was poured into MeOH (500 mL), and the resulting precipitate was collected and washed with hexane and methanol. The solid was dissolved in CHCl ₃ and the insoluble material was removed by filtration through a microfilter (0.45 μm). CHCl 3 _- hexanes followed by the CHCl 3 _- By repeating reprecipitation with methanol to give compound 9 of interest as a dark blue solid (42 mg, 51%). The number average molecular weight (M _n ) determined by gel filtration column chromatography analysis (polystyrene standard) of this compound was 13000 (n = 32), and the polydispersity index (PDI) was 2.3. In addition, when the compound 3 was not added, the molecular weight distribution of the obtained compound was biased toward the polymer side compared to that when the compound 3 was added.
¹ H NMR (400 MHz, CDCl ₃ ): δ 0.88 (broad s, 3H; Me), 1.26-3.91 (m, 28H; CH ₂ ), 6.30-7.52 (m, 4H; PPh); ³¹ P NMR (162 MHz, CDCl ₃ ): δ 51.6-56.4 (m); IR (KBr): ν _max 1175 (P = O) cm ^-1 .

(D) Synthesis of phosphole-thiophene block polymer A phosphole-thiophene block polymer (Ar: 4-dodecyloxyphenyl group) represented by the following chemical structural formula from compound 4b and 2,5-diiodothiophene by the same method as described above. ) Was synthesized. The number average molecular weight (M _n ) determined by gel filtration column chromatography analysis (polystyrene standard) of this compound was 2500 (n = 5), and the polydispersity index (PDI) was 2.0. The absorption maximum wavelength (λ _max ) in CH ₂ Cl ₂ was 574 nm.
¹ H NMR (400 MHz, CDCl ₃ ): δ 0.87 (broad s, 3H; Me), 1.25-2.81 (m, 26H; CH ₂ ), 3.92 (2H; OCH ₂ ) 6.86-7.63 (m, 6H; PPh , thiophene); ³¹ P NMR (162 MHz, CDCl ₃ ): δ 48.0-54.0 (m).

Example 4: Functional evaluation of compounds having a phosphole ring of the present invention in the molecule The UV / Vis absorption spectra (in CH ₂ Cl ₂ ) of compounds 7, 8 and 9 are shown in FIG. The reduction potential (measured by cyclic voltammetry and differential pulse voltammetry) is shown in Table 1. 1 and Table 1 also show data of monomer 10 represented by the following chemical structural formula (Saito, A. et al. Chem.-Eur. J. 2009, 15, 10000).

As is clear from FIG. 1 and Table 1, in the compound having the phosphole ring of the present invention in the molecule, the absorption maximum wavelength (λ _max ) shifted to the long wavelength side as the number of phosphole units increased. Bithiophene 11a and terthiophene 11b (Lee, S. et al. J. Phys. Chem. A 2000, 104, 1827) and polythiophene 12 (Izumi, T. et al. J. Am. Chem. Soc. 2003, 125, 5286) are 376 nm, 404 nm, and 546.3 nm, respectively, and therefore, the long wavelength side of the absorption maximum wavelength of the compound having the phosphor ring in the molecule of the present invention. In particular, the rise of Compound 9 reached 850 nm (E _g = 1.46 eV), and it was found that the π-conjugated system was very effectively extended. From the above results, it was found that the compound having the phosphole ring of the present invention in the molecule can be used as a photofunctional material. In addition, the reduction potential (E _red ) of the compound having the phosphor ring of the present invention in the molecule shifted to the positive side as the number of phosphor units increased, and the electron accepting ability increased. From the above results, it was found that the compound having the phosphole ring of the present invention in the molecule can also be used as an electron conductive material.

The present invention relates to a phosphole compound useful for the production of a compound having a phosphole ring such as polyphosphole in the molecule and a production method thereof, a method for producing a compound having a phosphole ring such as polyphosphole in the molecule, and a phosphole ring such as polyphosphole in the molecule. The present invention has industrial applicability in that it can provide an application as a compound and a functional material thereof.

Claims (9)

1. A phosphole compound having a stannyl group at the α-position represented by the following general formula (1).
   

   

   [Wherein R ¹ represents an alkyl group. X represents —SnR ² ₃ (R ² represents an alkyl group), an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an alkynyl which may have a substituent A group or an aryl group which may have a substituent. Y may optionally be interrupted by an oxygen atom, —S (O) ₁ — (wherein 1 represents an integer of 0 to 2), —NR ³ — (R ³ represents a hydrogen atom or an alkyl group), The alkylene group which may have a substituent is shown. Ar represents an aryl group which may have a substituent. ]
2. The diyne compound represented by the following general formula (2) is reacted with an organic transition metal compound, then reacted with ArPU ₂ (U represents a halogen atom, Ar is as defined above), and further P-oxide The method for producing a phosphole compound having a stannyl group at the α-position according to claim 1,
   

   

   [Wherein R ¹ , X and Y are as defined above. ]
3. A phosphole compound having a halogen atom at the α-position represented by the following general formula (3).
   

   

   [Wherein, R ⁴ represents a halogen atom. Z is an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, Indicates one of halogen atoms. Y and Ar are as defined above. ]
4. The method for producing a phosphole compound having a halogen atom at the α-position according to claim 3, wherein the stannyl group of the phosphole compound having a stannyl group at the α-position according to claim 1 is substituted with a halogen atom.
5. A process for producing a compound having a phosphole ring in the molecule by coupling the phosphole compound having a stannyl group at the α-position according to claim 1 and a heterocyclic compound substituted with a halogen atom in the presence of a metal catalyst.
6. The compound which has the phosphole ring represented by following General formula (4) in a molecule | numerator.
   

   

   [In formula, T shows the heterocyclic ring which may have a substituent. n represents an integer of 1 to 25. Y and Ar are as defined above. ]
7. The compound which has the phosphole ring of Claim 6 represented by following General formula (5) in a molecule | numerator.
   

   

   [Wherein, m represents an integer of 2 to 50. Y and Ar are as defined above. ]
8. A photofunctional material comprising a compound having a phosphole ring according to claim 6 in the molecule.
9. An electronically conductive material comprising a compound having the phosphole ring according to claim 6 in the molecule.

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