Method for preparing L-ascorbic acid or D-erythorbic acid carboxylate by using acyl chloride

A technology of ascorbic acid carboxylate and erythorbic acid, which is applied in the field of preparing L-ascorbic acid carboxylate or D-erythorbic acid carboxylate, can solve the problems of many by-products, long cycle, and influence on reaction yield, and achieve The effect of mild reaction conditions, short reaction cycle and high reaction yield
CN103539767BActive Publication Date: 2015-04-08江西省德兴市百勤异VC钠有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
江西省德兴市百勤异VC钠有限公司
Publication Date
2015-04-08

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Abstract

The invention relates to a method for preparing L-ascorbic acid or D-erythorbic acid carboxylate by using acyl chloride. According to the method, with DMAc (N,N-dimethylacetamide) or NMP (N-methyl pyrrolidone) as a solvent, a catalyst and an acid-binding agent in reaction of carboxylic acid and SOCl2, acryl chloride directly reacts with L-ascorbic acid or D-erythorbic acid without being separated to prepare L-ascorbic acid or D-erythorbic acid carboxylate. Compared with the existing acryl chloride method, the method disclosed by the invention has the characteristics of simple operation, little dosage of SOCl2, short reaction period, mild reaction conditions, high reaction yield, environmental friendliness and the like, and a used solvent does not need to be dried in advance.
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Description

technical field

[0001] The present invention relates to the fine chemical industry field, specifically, it is to provide a kind of using DMAc or NMP as carboxylic acid and SOCl 2 The reaction solvent, catalyst and acid-binding agent, the obtained acid chloride is directly reacted with L-ascorbic acid or D-isoascorbic acid to prepare L-ascorbic acid carboxylate or D-isoascorbic acid carboxylate without separation. Background technique

[0002] The synthesis method of L-ascorbic acid or D-isoascorbic acid carboxylate is acid-catalyzed or enzyme-catalyzed direct esterification method, transesterification method, and acid chloride method. The acid chloride method is especially suitable for the ester-forming reaction of carboxylic acids with poor activity or large steric hindrance and L-ascorbic acid or D-isoascorbic acid. The preparation of L-ascorbic acid or D-isoascorbic acid carboxylate by the acid chloride method is usually to first combine the carboxylic acid with SOCl 2 ...

Claims

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