Journal of Heterocyclic Chemistry

Ring??chain tautomerism of acetone N??methylated thiosemicarbazones

M Uda, S Kubota

Index: Uda,M.; Kubota,S. Journal of Heterocyclic Chemistry, 1979 , vol. 16, p. 1273 - 1275

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Citation Number: 15

Abstract

Abstract Ring-chain tautomerism of acetone N-methylated thiosemicarbazones was studied by nmr spectroscopy. Acetone thiosemicarbazone, acetone 2-methylthiosemicarbazone, and acetone 4-methylthiosemicarbazone exist as chain forms in DMSO-d 6 and ring forms in deuteriotrifluoroacetic acid. However, the compound obtained by reaction of acetone with 2, 4-dimethylthiosemicarbazide exists only as the ring form 3, 5, 5-trimethyl-1, 3, 4- ...