METHOD FOR PRODUCING ALKALI METAL 2-NAPHTHYLPYRUVATE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an alkali metal 2-naphthylpyruvate in a large amount at a low cost. SOLUTION: This method for producing the alkali metal 2-naphthylpyruvate represented by general formula [2] (M is an alkali metal), characterized by hydrolyzing 5-(2-naphthylidene)hydantoin represented by general formula [1] in a concentration of <=8 wt.% in the reaction mixture in the coexistence of an alkali metal hydroxide at a temperature of 90 to 100 deg.C.