Triflic Anhydride-Promoted Cyclizationof Sulfides: A Convenient Synthesis of Fused Sulfur Heterocycles
作者:Valentine G. Nenajdenko、Nikolay E. Shevchenko、Elizabeth S. Balenkova
DOI:10.1055/s-2003-39401
日期:——
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
阐述了一种合成环化硫杂环的新方法,该方法基于三氟甲磺酸酐促进的含烷基硫化物的杂芳基(芳基)环化。通过用三乙胺处理对最初形成的环状锍盐进行平滑去甲基化,得到许多五元、六元和七元稠合硫杂环。在二乙胺与 5 元锍盐的反应中发生了意外的开环。