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Updated: Aug 2, 2025

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
Published on: September 8, 2013
Synthesis of cyclopropanes through gold-catalyzed [2 + 1] cycloaddition of allenamides with sulfoxonium ylides
Tong Hong1, Yongchun Liu1, Kun Zhao1
1Key Laboratory of Basic Chemistry of the State Ethnic Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, PR China. lixiaoxiao.2005@163.com.
Abstract:
Cyclopropyl groups are widely found in pharmaceutical products and their application as precursors or key reaction intermediates benefits the development of a wide range of reactions. Herein, we report a facile protocol for the synthesis of this compound through gold-catalyzed [2 + 1] cycloaddition of allenamides with sulfoxonium ylides. The reaction exhibited good functional group tolerance and high efficiency, affording the products in good to excellent yields with good diastereoisomerism. The steric hindrance between the sulfonamide group and the gold catalyst determined the major configuration of the formed cis-cyclopropane product. Moreover, the aldehyde could be converted to amide under Schmidt reaction conditions and alcohol under reduction conditions.
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