METHOD FOR PRODUCING HETEROCYCLIC CARBOXYLIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a new quinoxaline-5- or 6- carboxylic acid. SOLUTION: This method for producing the quinoxaline-5- or 6-carboxylic acid comprises contacting an aqueous alkaline suspension of the corresponding 5- or 6-halomethylquinoxaline with oxygen in the presence of a transition metal catalyst. This method for oxidizing benzylic methyl group can also be adopted for producing a wide range of heterocyclic carboxylic acids.