Synthesis of 1,4-Dithiins from Pentathiepins

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• 作者：Stanislav A. Amelichev ; Lidia S. Konstantinova ; Natalia V. Obruchnikova ; Oleg A. Rakitin ; Charles W. Rees
• 刊名：Organic Letters
• 出版年：2006
• 出版时间：September 28, 2006
• 年：2006
• 卷：8
• 期：20
• 页码：4529 - 4532
• 全文大小：81K
• 年卷期：v.8,no.20(September 28, 2006)
• ISSN：1523-7052

文摘

Fused aromatic and heterocyclic 1,2,3,4,5-pentathiepins react with triphenylphosphine and alkynes bearing electron-withdrawing groups togive the corresponding 1,4-dithiins in high yields. Unsymmetrical alkynes add regioselectively to afford products in agreement with the electrondistribution in a proposed reaction intermediate. A mechanism for these reactions is proposed.