N. Kozhevnikova, V. Kharchenko
Aug 1, 1985
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Journal
Chemistry of Heterocyclic Compounds
Abstract
Depending on the degree of substitution of the thiopyran ring, either oxidation at the sulfur atom, which leads to the formation of the 1,1-dioxide, or dehydrogenation of the heteroring in the C(4) position may occur in the reaction of 4H-thiopyrans with hydrogen peroxide in acetic acid. In the case of dehydrogenation the composition of the products depends on the nature of the starting 4H-thiopyran. Some peculiarities of the structure of 4H-thiopyrans that promote their conversion to 1,1-dioxides were ascertained.