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Method for synthesizing Stilbene compound by utilizing Pfitzner-moffatt oxidizing reaction

A technology of stilbene compounds and oxidation reaction, which is applied in the field of synthesis of stilbene compounds by Pfitzner-moffatt oxidation reaction, which can solve the problems of high toxicity, environmental damage, and difficulty in industrial production

Inactive Publication Date: 2010-09-15
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the skeletons of stilbene compounds reported in literature at home and abroad are generally realized through Wittig-Horner condensation. The condensation reaction is carried out between substituted benzyl diethyl phosphate and substituted benzaldehyde. Some complex substituted benzaldehydes are generally formed from substituted benzene Oxidative synthesis of methanol, in order to prevent the generation of substituted benzoic acid and ensure that the oxidation stays in the aldehyde stage, special oxidizing reagents are usually used, such as highly toxic and carcinogenic PCC (pyridinium chlorochromate) and PDC (pyridinium chlorodichromate) etc. Although the oxidation yield is high, excessive PCC and PDC and a large amount of chromium-containing waste liquid produced after the reaction will cause serious damage to the environment, making it difficult to realize industrial production
There have also been reports on the method of oxidatively synthesizing stilbene compounds with hexamethylenetetramine, but the yield of this method is low

Method used

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  • Method for synthesizing Stilbene compound by utilizing Pfitzner-moffatt oxidizing reaction
  • Method for synthesizing Stilbene compound by utilizing Pfitzner-moffatt oxidizing reaction
  • Method for synthesizing Stilbene compound by utilizing Pfitzner-moffatt oxidizing reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Example 1 A method for synthesizing 3,5-dimethoxy-4-isopropylstilbene, namely styrene moder, by Pfitzner-moffatt oxidation reaction

[0103] The reaction scheme of present embodiment is as formula (II):

[0104]

[0105] Its reaction process is a 1 →b 1 → c 1 , the step-by-step reaction is as follows:

[0106]

[0107] Utilize the method of Pfitzner-moffatt oxidation reaction to synthesize phenylene modad to carry out according to the following sequence of steps:

[0108] a 1 .Compound A 1 That is, the preparation of 3,5-dimethoxy-4-isopropylbenzaldehyde:

[0109] Take 10.0 g (47.6 mmol) of 3,5-dimethoxy-4-isopropylbenzyl alcohol, 33 mL DMSO, and 22.5 mL acetic anhydride into a four-necked flask, stir, react at room temperature, and monitor by TLC. After the reaction is completed, add water, extract with ethyl acetate, wash with water, and remove the solvent by rotary evaporation to obtain product A 1 8.72g (41.9mmol). Yield 88%.

[0110] b 1 .Compound...

Embodiment 2

[0119] Example 2 A method for synthesizing 3,5-dimethoxy-4'-hydroxystilbene, namely pterostylbene, by using the Pfitzner-moffatt oxidation method

[0120] The reaction scheme of present embodiment is as formula (III):

[0121]

[0122] Formula (III)

[0123] Its reaction process is a 2 →b 2 → c 2 , the step-by-step reaction is as follows:

[0124]

[0125] This method is carried out according to the following sequence of steps:

[0126] a 2 .Compound A 2 That is, the preparation of 3,5-dimethoxybenzaldehyde:

[0127] Take 10.0 g (59.5 mmol) of 3,5-dimethoxybenzyl alcohol, 50 mL DMSO, and 30 mL acetic anhydride into a four-neck flask, stir, react at room temperature, and monitor by TLC. After the reaction is completed, add water, extract with ethyl acetate, wash with water, and remove the solvent by rotary evaporation to obtain product A 2 8.55 g (51.5 mmol). Yield 86.5%.

[0128] b 2 .Compound B2 is the preparation of 3,5-dimethoxy-4'-tert-butyldimethylsilyl...

Embodiment 3

[0137] Example 3 Synthesis method 1 of the method for synthesizing 3,4',5-trihydroxystilbene, namely resveratrol, by Pfitzner-moffatt oxidation reaction

[0138] The reaction scheme of present embodiment is as formula (IV):

[0139]

[0140] Formula (IV)

[0141] Its reaction process is a 3 →b 3 → c 3 , the step-by-step reaction is as follows:

[0142]

[0143]

[0144] This method is carried out according to the following sequence of steps:

[0145] a3 .Compound A 3 That is, the preparation of 3,5-dimethoxybenzaldehyde

[0146] Take 10.0 g (59.5 mmol) of 3,5-dimethoxybenzyl alcohol, 60 mL of DMSO, and 40 mL of acetic anhydride into a four-necked flask, stir, react at room temperature, and monitor by TLC. After the reaction is completed, add water, extract with ethyl acetate, wash with water, and remove the solvent by rotary evaporation to obtain product A 3 8.87g (53.4mmol). Yield 89.8%.

[0147] b 3 .Compound B3 is 3,4 ', the preparation of 5-trimethoxys...

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Abstract

The invention discloses a method for synthesizing Stilbene compound by utilizing Pfitzner-moffatt oxidizing reaction. In the method, substituted benzyl alcohol is taken as a raw material, DMSO, namely dimethyl sulfoxide is adopted to prepare corresponding substituted benzaldehyde compound through Pfitzner-moffatt oxidizing reaction; and the target production Stilbene compound is prepared through Wittig-Horner condensation. The method is simple and practicable, has safe reactant involving in the synthesized process, moderate reaction condition and high yield, is suitable for the industrial production of various Stilbene compound, such as red sandalwood, Stilbene, resveratrol, oxidized resveratrol and Piceatannol, etc.

Description

technical field [0001] The invention relates to a method for synthesizing stilbene compounds, that is, compounds with stilbene skeletons, in particular to a method for synthesizing stilbene compounds by using Pfitzner-moffatt oxidation reaction. Background technique [0002] Compounds with 1,2-stilbene skeleton and their polymers are collectively called stilbene compounds, which have high chemical and pharmaceutical activities. The stilbene compounds containing different substituents have different uses due to their different chemical properties. The positions of the substituents are mainly concentrated in the 3, 5, 4, and 4' positions of the stilbene molecule. When the 3, 5, and 4' positions are respectively When it contains methoxy, hydroxyl or amino, it has obvious pharmaceutical physiological activity, as shown by research: stilbene substituted by 3,5-position hydroxy, 4-position isopropyl (styrene moder); 3,5-position A Oxygen-substituted, 4'-hydroxyl-substituted stilb...

Claims

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Application Information

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IPC IPC(8): C07B37/00C07C37/055C07C39/21C07C41/26C07C43/23C07C43/215
Inventor 张越赵树春
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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