Synthesis method of isoliquiritigenin

A technology of isoliquiritigenin and synthesis method, which is applied in the field of synthesis of isoliquiritigenin, can solve the problems of high cost, high requirements on reaction conditions, and low yield of isoliquiritigenin, and achieve low cost, simple and easy method, and reduced side effects. The effect of the risk of product formation

Inactive Publication Date: 2018-08-24
湖北凌晟药业股份有限公司
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  • Abstract
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Problems solved by technology

[0005] Aiming at the problems of low yield of isoliquiritigenin, high cost and high requirements on reaction conditions, the present invention provides a synthetic method of isoliquiritigenin

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  • Synthesis method of isoliquiritigenin

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preparation example Construction

[0018] The embodiment of the present invention provides a synthesis method of isoliquiritigenin. The synthesis method of isoliquiritigenin uses 2,4-hydroxyacetophenone and 4-hydroxybenzaldehyde as raw materials, and undergoes hydroxyl protection, aldol condensation, and hydroxyl deprotection reactions to obtain the product isoliquiritigenin. The specific synthesis steps as follows:

[0019] (1) Provide 2,4-dihydroxyacetophenone, mix the 2,4-dihydroxyacetophenone with an alkaline reagent and an organic solvent, add a hydroxyl protection reagent, and stir the reaction at 0-100°C , protecting the 4-hydroxyl group of the 2,4-dihydroxyacetophenone;

[0020] (2) 4-hydroxybenzaldehyde is provided, after the 4-hydroxybenzaldehyde is mixed with an alkaline reagent and an organic solvent, a hydroxyl protection reagent is added, and a stirring reaction is performed at 0-100° C. Formaldehyde carries out hydroxyl protection;

[0021] (3) 2,4-dihydroxyacetophenone after step (1) hydroxyl...

Embodiment 1

[0043] A kind of synthetic method of isoliquiritigenin, concrete synthetic steps are as follows:

[0044] (1) Add 12.2g of 4-hydroxybenzaldehyde and 14.3g of imidazole into a round bottom flask, add dichloromethane and stir evenly, lower the system to 0-5°C, and slowly drop in 21.12g of dimethyl tert-butyl Chlorosilane, then stirred at 25-30°C, detected by TLC, after 6 hours the reaction was completed, water was added to the system, the organic phase was washed with 1N hydrochloric acid, and then washed with saturated brine, dried and distilled under reduced pressure to obtain 21.08 g of oily product, yield 89%.

[0045] (2) Add 13.71g of 2,4-dihydroxyacetophenone and 17.02g of imidazole into a round bottom flask, add dichloromethane and stir evenly, lower the system to 0-5°C, and slowly drop in 22.60g of dimethyl tert-butylchlorosilane, then stirred at 25-30°C, detected by TLC, after stirring for 5 hours, added water to the system, washed the organic phase with 1N hydrochlor...

Embodiment 2

[0049] A kind of synthetic method of isoliquiritigenin, concrete synthetic steps are as follows:

[0050] (1) Add 4.88g of 4-hydroxybenzaldehyde into a round bottom flask, add dichloromethane and stir to dissolve completely, then add 10.84g of diisopropylethylamine, cool the system to 0-5°C, slowly drop Add 10.75g of triisopropylchlorosilane, then stir at 25-30°C, detect by TLC, after 5h the reaction is complete, add water to the system, wash the organic phase with 1N hydrochloric acid, and then wash with saturated brine, the organic phase After drying, the solvent was distilled off under reduced pressure to obtain 9.68 g of oily product, with a yield of 87%;

[0051] (2) Add 4.56g of 2,4-dihydroxyacetophenone into a round bottom flask, add dichloromethane and stir to dissolve completely, then add 9.68g of diisopropylethylamine, and cool the system to 0-5 ℃, slowly drop 8.64g triisopropylchlorosilane, then stir at 25-30℃, TLC detection, after stirring for 4h, add water to the...

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Abstract

The invention relates to the technical field of organic synthesis, and particularly discloses a synthesis method of isoliquiritigenin. According to the synthesis method of isoliquiritigenin, 2,4-hydroxyacetophenone and 4-hydroxybenzaldehyde are used as raw materials, and the product namely isoliquiritigenin can be obtained through hydroxyl protection, aldol condensation and hydroxyl deprotection reaction. The synthesis method of isoliquiritigenin, provided by the invention, is simple and easy to implement, mild in reaction conditions, safe, reliable, high in raw material availability, low in price and low in cost, adopts at least one of dimethyl tert-butyl chlorosilane and triisopropyl chlorosilane to protect 4-hydroxyl groups of 4-hydroxybenzaldehyde and 2,4-dihydroxyacetophenone, reducesthe risk of byproduct generation, improves the yield of isoliquiritigenin, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a method for synthesizing isoliquiritigenin. Background technique [0002] Licorice is a perennial herb. The roots and rhizomes of licorice have the functions of invigorating the middle and nourishing Qi, eliminating phlegm and relieving cough, relieving spasms and relieving pain, detoxifying and harmonizing various medicines. The active ingredients of licorice mainly include tritie saponin and various flavonoids. Isoliquiritigenin is a chalcone compound isolated from the hydrolyzate of licorice root. [0003] Isoliquiritigenin, one of the important medicinal active ingredients in licorice flavonoids, exhibits strong biological activity in various pharmacological effects, such as anti-tumor, anti-virus, anti-free radical, anti-arrhythmia, etc. . Among them, the anti-tumor activity is a research hotspot in recent years. Studies have found that isoliquiritigenin can pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/65C07C49/835C07F7/18
CPCC07C45/65C07F7/188C07F7/1892C07C49/835
Inventor 杨双兵门万辉金联明邹菁
Owner 湖北凌晟药业股份有限公司
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