Studies on enethiols—III: Syntheses and spectroscopic investigations of β-thioketothiolesters

F Duus, P Jakobsen, SO Lawesson

Index: Duus,F. et al. Tetrahedron, 1968 , vol. 24, p. 5323 - 5336

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Citation Number: 19

Abstract

β-Thioketothiolesters have been prepared by the acid catalysed reaction between β- ketothiolesters and hydrogen sulphide. NMR, IR, and UV spectroscopic investigations show that the title compounds exist mainly as intramolecularly hydrogen-bonded α, β-unsaturated β-mercaptothiolesters both in the pure liquid state and in solution. The thermochromism exhibited by the β-thioketothiolesters has been studied by NMR and is attributed to a shift ...