Synthesis

Triflic anhydride-promoted cyclization of sulfides: A convenient synthesis of fused sulfur heterocycles

NE Shevchenko, VG Nenajdenko, ES Balenkova

文献索引：Shevchenko, Nikolay E.; Nenajdenko, Valentine G.; Balenkova, Elizabeth S. Synthesis, 2003 , # 8 p. 1191 - 1200

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被引用次数: 21

摘要

Abstract A new approach to the synthesis of annulated sulfur heterocycles based on triflic anhydride-promoted cyclization of the hetaryl (aryl) containing alkyl sulfides was elaborated. Smooth demethylation of initially formed cyclic sulfonium salts by treatment with triethylamine afforded a number of five-, six-and seven-membered fused sulfur heterocycles. Unexpected ring opening took place in the reaction of diethylamine with 5-membered ...