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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 17, 1987 - Issue 14
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Original Articles

Dithioannulation of Alkynes

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Pages 1683-1694 | Published online: 06 Dec 2006
 

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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