Dithioannulation of Alkynes

S. Ghosal Department of Chemistry, University of Miami, Coral Gables, Florida, 33124

M. Nirmal Department of Chemistry, University of Miami, Coral Gables, Florida, 33124

J. C. Medina Department of Chemistry, University of Miami, Coral Gables, Florida, 33124

K. S. Kyler Department of Chemistry, University of Miami, Coral Gables, Florida, 33124

Abstract

A direct method for the preparation of 2,3-diphenyl-1,4-dithiins has been developed. The process involves treating alkynes with nickel bisdiphenyl-dithiolene in refluxing chlorobenzene in the presence of pyridine. Pyridine appears to be essential in order to avoid further transformation of 1,4-dithiins to thiophenes.

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Dithioannulation of Alkynes

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Dithioannulation of Alkynes

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