METHOD FOR PRODUCING DIBENZOYLTARTARIC ACID AND ACID ANHYDRIDE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide methods for industrially advantageously producing dibenzoyltartaric acid and acid anhydride thereof with no formation of byproducts including benzoic acid and sulfur dioxide gas needing troublesome after-treatment. SOLUTION: The method for producing the dibenzoyltartaric anhydride comprises carrying out a reaction between tartaric acid, benzoyl chloride and benzotrichloride in an organic solvent. The method for producing the dibenzoyltartaric acid comprises hydrolyzing the resultant dibenzoyltartaric anhydride. COPYRIGHT: (C)2004,JPO