The preparation and properties of some thioacylmethylenethiazolines and isothiazolines

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Abstract
Thiazoline-2-thiones and isothiazoline-3-thiones are converted into the 2- or 3-thiophenacylidene derivatives, respectively, by reaction with phenacyl bromide, treatment with pyridine, and thionation. The former compounds react with dimethyl acetylenedicarboxylate to form mono- and diadducts as well as some decomposition products. Attempts to demonstrate valency isomerism in the 3-thiophenacylideneisothiazoline derivatives were unsuccessful.

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