Synthesis of cyclic sulfides

A general scheme is proposed for the synthesis of 4-alkylthiacyclohexanes by reaction of 1-alken-3-ylmagnesium halides with ethylene episulfide and subsequent cyclization of the resulting 3-alkylpent-4-ene-1-thiols under the in-fluence of UV irradiation. 4-Amyl- and 4-octylthiacyclohexanes, together with 2-methyl-3-octylthiacyclopentane, were obtained, respectively, from 1-octen-3-ylmagnesium bromide, 1-undecen-3-ylmagnesium chloride, and ethylene episulfide.See 1] for communication. VII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1622–1624, December, 1977.