Advanced Synthesis & Catalysis

Sulfur as a Bridge: Synthesis of Medium Rings via a Bicyclic Sulfonium Ion

H Zhou, Y Xing, L Liu, J Hong

Index: Zhou, Hongwei; Xing, Yanpeng; Liu, Le; Hong, Junjie Advanced Synthesis and Catalysis, 2011 , vol. 353, # 17 p. 3146 - 3150

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Citation Number: 4

Abstract

Abstract A facile and efficient synthesis of medium rings via a bicyclic sulfonium ion was developed. Spectroscopic evidence for the formation of an intermediate sulfonium moiety is provided. The sulfur atom served as a “bridge” to access the medium ring system and could be removed after use via a Ramberg–Bäcklund process. As a result of the readily available starting materials, simple operation, and mild conditions, these reactions should be an ...

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