Reaction of Diphenylcyclopropenethione with Pyridinium Imines

JW Lown, K Matsumoto

Index: Lown,J.W.; Matsumoto,K. Canadian Journal of Chemistry, 1972 , vol. 50, p. 584 - 590

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Citation Number: 14

Abstract

Reaction of diphenylcyclopropenethione with a variety of N-substituted pyridinium imines in refluxing benzene gives 2, 4, 5-trisubstituted-6 H-1, 3-oxazin-6-thiones in good to excellent yields. The structure of 2, 4, 5-triphenyl-6 H-1, 3-oxazin-6-thione prepared in this manner was proven by oxidation and by hydrolysis to the known 2, 4, 5-triphenyl-6 H-1, 3-oxazin-6- one. In the preparation of 4, 5-diphenyl-2-ethoxy-6 H-1, 3-oxazin-6-thione changing the ...