Chemical and Pharmaceutical Bulletin

Studies on Fungicides. XXI. Reaction of Dimethyl Acetylenedicarboxylate with Thioureas

H NAGASE

Index: Nagase,H. Chemical and Pharmaceutical Bulletin, 1973 , vol. 21, p. 270 - 278

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Citation Number: 31

Abstract

The reaction of dimethyl acetylenedicarboxylate with thioureas was re-investigated to examine the structure of the products previously recorded in several papers without definite evidence. By chemical reactions and spectroscopic data the five-membered structure, 2- imino-4-thiazolidone (II), was given to the products, contrary to the previously proposed six- membered structure, 2, 3-dihydro-1, 3-thiazin-4-one.