CN110590847B - Preparation method of 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide) - Google Patents

Preparation method of 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide) Download PDF

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CN110590847B
CN110590847B CN201910936618.1A CN201910936618A CN110590847B CN 110590847 B CN110590847 B CN 110590847B CN 201910936618 A CN201910936618 A CN 201910936618A CN 110590847 B CN110590847 B CN 110590847B
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邹建平
陶泽坤
吕帅帅
李成坤
李建安
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Abstract

The invention discloses a preparation method of 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroandole-1-oxide), which comprises the following steps: dissolving alkyne, a phosphorus reagent, a copper catalyst and organic peroxide in a solvent, and reacting at 50-100 ℃ to obtain a phosphindole derivative; heating a mixture of the phosphoindole derivative, acetonitrile, N-bromosuccinimide and tert-butyl peroxide for reaction; after the reaction is finished, adding 1, 4-phenyl diboronic acid, palladium acetate, potassium carbonate, acetonitrile and water, and then heating to react at 90 ℃; to obtain 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide); the alkyne can be alkyl alkyne, aryl alkyne, five-membered heteroaryl alkyne and six-membered heteroaryl alkyne. The method disclosed by the invention has the advantages of mild reaction conditions, short reaction time, high yield of target products and simple reaction operation and post-treatment process.

Description

Preparation method of 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide)
The invention belongs to a phospha indole derivative, a benzo phospha indole derivative and a preparation method thereof, and divisional applications of invention application with application date of 2018, 10 and 8 and application number of 2018111699022, belonging to the parts of preparation methods of different products.
Technical Field
The invention belongs to the technical field of preparation of organic compounds, and particularly relates to a preparation method of 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroandole-1-oxide).
Background
Phosphorus-containing heterocyclic compounds can be used for catalytic reactions, such as phospholanes, phospholes, benfozonandoles, etc., which can effectively catalyze organic reactions (references van Kalkeren, h. a., van Delft, f. l., Rutjes f.p.j.t. chemsus chem 2013, 6, 1615-. The catalytic action of these heterocyclic compounds results from the fact that the reduction rate in the reaction can be greatly increased (references van Kalkeren, h. a., Leenders, s.h.a. m., hommernom, r. a., Rutjes, f.p.j. t., van Delft, f.l. chem. -eur. j. 2011, 17, 11290-. Current areas of development include catalytic Wittig and Appel reactions (references Denton, r. m., An, j., adeniiran, b., Blake, a. j., Lewis, w., Poulton, a.m.j. org. chem. 2011, 76, 6749-. For example, 5-phenylbenzo [ b ] phospha indole-5-oxide can be used as a catalyst for deoxidation condensation reaction, but in the disclosed synthetic route of 5-phenylbenzo [ b ] phospha indole-5-oxide, raw materials are difficult to obtain, reaction conditions are harsh, and the operation is complicated.
In addition, the conjugated system containing the phosphorindole structural unit can be applied to the synthesis of photoelectric materials, for example, 2'- (1, 4-phenylene) bis (1-phenylphosphindole-1-oxide) can absorb 387nm light and emit 431nm and 456nm light, and in the disclosed synthetic route of 2,2' - (1, 4-phenylene) bis (1-phenylphosphindole-1-oxide), raw materials are difficult to obtain, strong base is needed, and the yield is low. Therefore, it is very important to develop a synthesis method with mild reaction conditions, simple reaction steps and simple and easily available raw materials.
Disclosure of Invention
The invention aims to provide a phospha indole derivative, a benzo phospha indole derivative and a preparation method thereof, which have the advantages of simple raw material source, mild reaction condition, simple post-treatment, high yield and the like.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a preparation method of a phospha indole derivative comprises the following steps: dissolving alkyne, a phosphorus reagent, a copper catalyst and organic peroxide in a solvent, and reacting at 50-100 ℃ to obtain a phosphindole derivative;
the alkyne is shown as the following chemical structural general formula:
Figure 256516DEST_PATH_IMAGE001
wherein R is selected from one of hydrogen, alkyl, aralkyl, aryl, heteroaralkyl and heteroaryl;
the phosphorus reagent is represented by the following structural general formula:
Figure 130931DEST_PATH_IMAGE002
wherein Ar is selected from aryl.
A preparation method of a benzo-phospha-indole derivative comprises the following steps: dissolving alkyne, a phosphorus reagent, a copper catalyst and organic peroxide in a solvent, and reacting at 50-100 ℃ to obtain a phosphindole derivative; reacting the phospha indole derivative with 2, 5-dimethoxy tetrahydrofuran to prepare a benzo phospha indole derivative;
the alkyne is shown as the following chemical structural general formula:
Figure 147166DEST_PATH_IMAGE001
wherein R is selected from one of hydrogen, alkyl, aralkyl, aryl, heteroaralkyl and heteroaryl;
the phosphorus reagent is represented by the following structural general formula:
Figure 892268DEST_PATH_IMAGE002
wherein Ar is selected from aryl.
Preferably, the benzo-phospha-indole derivative is prepared by using dichloromethane as solvent and ZnBr2Is a catalyst.
The invention also discloses the application of taking alkyne and phosphorus reagents as raw materials in preparing the phosphabendole derivative in the presence of a copper catalyst, organic peroxide and a solvent; the application of alkyne and phosphorus reagents as raw materials in the preparation of benzo-phospha-indole derivatives in the presence of a copper catalyst, organic peroxide, a solvent and 2, 5-dimethoxy tetrahydrofuran.
The invention also discloses a preparation method of the 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroandole-1-oxide), which comprises the following steps:
(1) dissolving alkyne, a phosphorus reagent, a copper catalyst and organic peroxide in a solvent, and reacting at 50-100 ℃ to obtain a phosphindole derivative;
(2) heating a mixture of the phosphoindole derivative, acetonitrile, N-bromosuccinimide and tert-butyl peroxide for reaction; after the reaction is finished, adding 1, 4-phenyl diboronic acid, palladium acetate, potassium carbonate, acetonitrile and water, and then heating to react at 90 ℃; to obtain 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide) which can be used as an optoelectronic material. Preferably, the mol ratio of the phosphindole derivative, the N-bromosuccinimide, the tert-butyl peroxide, the 1, 4-phenyl diboronic acid, the palladium acetate and the potassium carbonate is 3: 6: 9: 4: 0.24: 10.
In the invention, the alkyne can be alkyl alkyne, aryl alkyne, five-membered heteroaryl alkyne and six-membered heteroaryl alkyne; the alkyl alkyne is represented by the following chemical structural general formula:
Figure 797907DEST_PATH_IMAGE003
wherein R is5One selected from hydrogen, ethyl, butyl, heptyl, phenethyl or phenylbutyl;
the self-aryl alkyne is shown as the following chemical structural general formula:
Figure 34985DEST_PATH_IMAGE004
wherein R is1Selected from: alkyl, alkoxyOne of group, halogen, nitro, trifluoromethyl and ester group.
The organic peroxide is shown as the following chemical structural general formula:
Figure 185737DEST_PATH_IMAGE005
wherein R is2Selected from: one of methyl or phenyl; r3Selected from: one of hydrogen, tert-butyl or benzoyl;
the chemical formula of the copper catalyst is CuXn, wherein X is one of Cl, Br, I and SCN; n is 1 or 2.
The solvent is selected from: methanol, ethanol, acetonitrile, acetone, ethyl acetate, water, 1, 2-dichloroethane, toluene, N-dimethylformamide or N-methylpyrrolidone.
The phospha indole derivative is shown as the following chemical structural general formula:
Figure 988608DEST_PATH_IMAGE006
the benzo phospha indole derivative is shown as the following chemical structural general formula:
Figure 330727DEST_PATH_IMAGE007
preferably, the alkyne is selected from one of acetylene, butyne, hexyne, 4-phenyl-1-butyne, nonyne, phenylacetylene, 4-methylphenylacetylene, 4-methoxyphenylacetylene, 4-fluorophenylacetylene, 4-chlorophenylacetylene, 4-bromophenylacetylene, 4- (trifluoromethyl) phenylacetylene, 4-nitrophenylacetylene, 4-methoxycarbonylphenylacetylene, 3-methylphenylacetylene, 3-chlorophenylacetylene, 3-methoxyphenylacetylene, 2-methylphenylacetylene, 2-fluorophenylacetylene, 2-chlorophenylacetylene, 2- (trifluoromethyl) phenylacetylene, 1-phenyl-1-propyne, 4-phenyl-1-butyne; the phosphorus reagent is selected from one of diphenyl phosphine oxide and bis (4-methoxyphenyl) phosphine oxide;
in the above technical scheme, the reaction is followed by Thin Layer Chromatography (TLC) until complete completion.
In the technical scheme, the mol ratio of alkyne, phosphorus reagent, copper catalyst and organic peroxide is 1: 2: 0.2: 2-6; the mol ratio of the phosphindole derivative to the 2, 5-dimethoxy tetrahydrofuran is 1: 2-2.5.
In the technical scheme, after the reaction is finished, the product is subjected to column chromatography separation and purification treatment.
The reaction process of the above technical scheme can be represented as follows:
Figure 851839DEST_PATH_IMAGE008
phosphoindoles
Figure 6614DEST_PATH_IMAGE009
Benzophosphandoles
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention uses alkyne as the starting material, and the raw materials are easy to obtain and have various types.
2. The method disclosed by the invention has the advantages of mild reaction conditions, short reaction time, high yield of target products and simple reaction operation and post-treatment process.
Detailed Description
The invention is further described below with reference to the following examples:
the first embodiment is as follows: synthesis of 1-phenylphosphoindole-1-oxides
Acetylene and diphenyl phosphine oxide are used as raw materials, and the reaction steps are as follows:
(1) acetylene (0.026 g, 0.5 mmol), diphenylphosphine (0.202 g, 1 mmol) and CuCl were introduced into a reaction flask2(0.014g, 0.1 mmol), tert-butyl peroxybenzoate (0.15 g, 1.5 mmol) and methanol (2 mL), 50oC reaction;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) the crude product obtained after the completion of the reaction was separated by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain the objective product (yield 80%). Analytical data for the product are as follows:1H NMR (CDCl3, 500MHz): δ 7.73−7.69 (m, 2H, ArH), 7.62−7.59 (m, 1H, ArH), 7.34−7.53 (m, 6H, ArH; 1H, Ar−CH), 6.45 (dd, J = 25 Hz, 8 Hz,1H)。
example two: synthesis of 1-phenyl-3-ethylphosphoindole-1-oxide
Butyne and phosphorus diphenoxylate are taken as raw materials, and the reaction steps are as follows:
(1) butyne (0.027 g, 0.5 mmol), phosphorus diphenoxylate (0.202 g, 1 mmol), CuCl (0.01g, 0.1 mmol), di-tert-butyl peroxide (0.45 g, 3 mmol), and ethanol (2 mL), 60%oC, reacting;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) the crude product obtained after the completion of the reaction was separated by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain the objective product (yield 82%). Analytical data for the product are as follows: 1H NMR (400 MHz, CDCl3): δ7.70−7.65 (m, 2H), 7.62−7.50 (m, 1H), 7.34−7.49 (m, 6H), 6.40 (m, 1H)。 2.05 (m, 2H), 1.08 (t, J = 7.6 Hz, 3H)。
example three: synthesis of 1-phenyl-3-butylphosphoindole-1-oxide
Hexyne and phosphorus diphenoxy are taken as raw materials, and the reaction steps are as follows:
(1) hexyne (0.041 g, 0.5 mmol), diphenylphosphine (0.202 g, 1 mmol) and CuBr were added to the reaction flask2 (0.022 g, 0.1 mmol), tert-butanol peroxide (0.15 mL, 1 mmol) and acetonitrile (2 mL), 60oC, reacting;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) the crude product obtained after the completion of the reaction was separated by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain the objective product (yield 83)%). Analytical data for the product are as follows:1H NMR (400 MHz, CDCl3): δ7.71−7.62 (m, 2H), 7.60−7.45 (m, 1H), 7.34−7.40 (m, 6H), 6.38 (m, 1H), 2.05 (m, 2H), 1.65−1.45 (m, 4H), 1.08 (t, J = 7.6 Hz, 3H)。
example four: synthesis of 1- (4-methoxyphenyl) -5-methoxyphosphandole-1-oxide
Acetylene and di (4-methoxyphenyl) oxyphosphorus are taken as raw materials, and the reaction steps are as follows:
(1) acetylene (0.026 g, 0.5 mmol), bis (4-methoxyphenyl) oxyphosphorus (0.262 g, 1 mmol), CuBr (0.014g, 0.1 mmol), t-butyl peroxybenzoate (0.29 g, 3 mmol), and acetone (2 mL), 50oC, reacting;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) the crude product obtained after the completion of the reaction was separated by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain the objective product (yield 84%). Analytical data for the product are as follows:1H NMR (400 MHz, CDCl3): δ7.80 (m, 1H), 7.75 (m, 2H), 7.68 (m, 1H), 7.50 (m, 2H), 7.46 (m, 1H), 7.30 (m, 1H), 6.55 (d, J = 7.6 Hz, 1H), 3.88 (s, 3H), 3.86(s, 3H)。
example five: synthesis of 5-phenylbenzo [ b ] phosphinylindole-5-oxide
Acetylene and diphenyl phosphine oxide are used as raw materials, and the reaction steps are as follows:
(1) acetylene (0.026 g, 0.5 mmol), diphenylphosphine (0.202 g, 1 mmol) and CuCl were introduced into a reaction flask2(0.014g, 0.1 mmol), tert-butyl peroxybenzoate (0.15 g, 1.5 mmol) and methanol (2 mL), 50oC, reacting;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) separating the crude product obtained after the reaction by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain 1-phenylphosphidine-1-oxide;
1-phenylphosphaindole-1-oxide and 2, 5-dimethoxytetrahydrofuran are taken as raw materials, and the reaction steps are as follows:
(1) at 0 deg.C, 2.5mL of methylene chloride was added to the reaction flask, 1-phenylphosphidole-1-oxide (0.057 g, 0.25 mmol) and 2, 5-dimethoxytetrahydrofuran (0.073 mL, 0.55 mmol) were added, and ZnBr was added2(0.111 g, 0.5 mmol), the mixture was stirred for reaction;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) the crude product obtained after the completion of the reaction was separated by column chromatography (ethyl acetate: petroleum ether = 1:10) to obtain the objective product (yield 81%) which was used as a catalyst. Analytical data for the product are as follows:1H NMR (300 MHz, CDCl3): δ7.85 – 7.80 (m, 2H), 7.75 – 7.55 (m, 6H), 7.52 – 7.45 (m, 1H), 7.43 – 7.34 (m, 4H)。
example six: synthesis of 2-methoxy-5- (4-methoxyphenyl) benzo [ b ] phosphinylindole-5-oxide
Acetylene and di (4-methoxyphenyl) oxyphosphorus are taken as raw materials, and the reaction steps are as follows:
(1) acetylene (0.026 g, 0.5 mmol), bis (4-methoxyphenyl) oxyphosphorus (0.262 g, 1 mmol), CuBr (0.014g, 0.1 mmol), t-butyl peroxybenzoate (0.29 g, 3 mmol), and acetone (2 mL), 50oC, reacting;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) separating the crude product obtained after the reaction by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain 1- (4-methoxyphenyl) -5-methoxyphosphoindole-1-oxide;
1- (4-methoxyphenyl) -5-methoxyphosphandole-1-oxide and 2, 5-dimethoxytetrahydrofuran are taken as raw materials, and the reaction steps are as follows:
(1) at 0 deg.C, 2.5mL of methylene chloride was added to the flask, followed by 1- (4-methoxyphenyl) -5-methoxyphosphandole-1-oxide (0.072 g, 0.25 mmol) and 2, 5-dimethoxytetrahydrofuran (0.073 mL, 0.55 mmol), and finally ZnBr2(0.111 g, 05 mmol), the mixture is stirred for reaction;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) the crude product obtained after the completion of the reaction was separated by column chromatography (ethyl acetate: petroleum ether = 1:10) to obtain the objective product (yield 82%) which was used as a catalyst. Analytical data for the product are as follows:1H NMR (400 MHz, CDCl3): δ7.90– 7.82 (m, 2H), 7.76 – 7.58 (m, 6H), 7.51 – 7.42 (m, 1H), 7.40 – 7.32 (m, 4H), 3.88 (s, 3H), 3.86 (s, 3H)。
example seven: synthesis of 2,2' - (1, 4-phenylene) bis (1-phenylphosphine isoindole-1-oxide)
Acetylene and diphenyl phosphine oxide are used as raw materials, and the reaction steps are as follows:
(1) acetylene (0.026 g, 0.5 mmol), diphenylphosphine (0.202 g, 1 mmol) and CuCl were introduced into a reaction flask2(0.014g, 0.1 mmol), tert-butyl peroxybenzoate (0.15 g, 1.5 mmol) and methanol (2 mL), 50oC, reacting;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) separating the crude product obtained after the reaction by column chromatography (ethyl acetate: petroleum ether = 1:1) to obtain 1-phenylphosphidine-1-oxide;
1-phenyl-phospha indole-1-oxide is taken as a raw material, and the reaction steps are as follows:
(1) 1-phenylphosphindole-1-oxide (0.678 g, 3 mmol), acetonitrile (26 mL), N-bromosuccinimide (1.056 g, 6 mmol) and tert-butyl peroxide (1.35 mL, 9 mmol) were added to a reaction flask, and the mixture was heated to react;
(2) TLC tracing the reaction until the reaction is completely finished;
(3) adding water (20 mL) into the reaction solution, extracting with ethyl acetate, washing the organic phase with a sodium sulfite solution and a saturated sodium chloride solution, drying, and concentrating under reduced pressure to dryness;
(4) to (3) was added 1, 4-benzenediboronic acid (0.657 g, 4.0 mmol), palladium acetate (0.054 g, 0.24 mmol), potassium carbonate (1.41 g, 10 mmol), acetonitrile (20 mL) and water (20 mL), and the mixture was heated at 90 ℃ for reaction;
(5) TLC tracing the reaction until the reaction is completely finished;
(6) water was added to the reaction solution, followed by extraction with ethyl acetate. The organic phase is washed by brine, dried and concentrated under reduced pressure to obtain a crude product, and then the crude product is separated and purified by column chromatography (n-hexane/diethyl ether (4: 1)) to obtain 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroandole-1-oxide) (yield is 65%) which can be used as a photoelectric material. Analytical data for the product are as follows:1H NMR (300 MHz, CDCl3): δ7.25-7.71 (m, 24H)。

Claims (2)

1. a method for preparing 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide), comprising the following steps: dissolving alkyne, a phosphorus reagent, a copper catalyst and organic peroxide in a solvent, and reacting at 50-100 ℃ to obtain a phosphindole derivative; heating a mixture of the phosphoindole derivative, acetonitrile, N-bromosuccinimide and tert-butyl peroxide for reaction; after the reaction is finished, adding 1, 4-phenyl diboronic acid, palladium acetate, potassium carbonate, acetonitrile and water, and then heating to react at 90 ℃; to obtain 2,2' - (1, 4-phenylene) bis (1-phenylphosphine heteroindole-1-oxide); the alkyne is acetylene;
the phosphorus reagent is selected from diphenylphosphine oxide;
the organic peroxide is tert-butyl peroxybenzoate;
the chemical formula of the copper catalyst is CuXn, wherein X is one of Cl, Br, I and SCN; n is 1 or 2;
the solvent is selected from: one of methanol, ethanol, acetonitrile, acetone, ethyl acetate, water, 1, 2-dichloroethane, toluene, N-dimethylformamide or N-methylpyrrolidone;
the phospha indole derivative is 1-phenyl phospha indole-1-oxide.
2. The preparation method of claim 1, wherein the molar ratio of alkyne, phosphorus reagent, copper catalyst and organic peroxide is 1: 2: 0.2: 2-6; the reaction was followed by Thin Layer Chromatography (TLC) until complete; and after the reaction is finished, performing column chromatography separation and purification treatment on the product.
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CN109096337B (en) 2019-11-22

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