Bulletin of the Chemical Society of Japan

Cyclization of Isothiosemicarbazones. IV. Synthesis of the [1, 2, 4] Triazolo [1, 5-c] pyrimidine Ring System

C Yamazaki

Index: Yamazaki, Chiji Bulletin of the Chemical Society of Japan, 1981 , vol. 54, # 6 p. 1767 - 1772

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Citation Number: 13

Abstract

Condensation of isothiosemicarbazones with ethoxymethylenemalononitrile gave 2, 3- dihydro [1, 2, 4] triazolo [1, 5-c] pyrimidines in moderate to high yields. The 2, 3-dihydro compounds were readily oxidized in dimethyl sulfoxide to give the corresponding [1, 2, 4] triazolo [1, 5-c] pyrimidines.