Synthesis of amido-spiro[2.2]pentanes via Simmons–Smith cyclopropanation of allenamides
作者:Ting Lu、Ryuji Hayashi、Richard P. Hsung、Kyle A. DeKorver、Andrew G. Lohse、Zhenlei Song、Yu Tang
DOI:10.1039/b908205k
日期:——
Simmons–Smith cyclopropanations of allenamides en route to amido-spiro[2.2]pentanes is described here. While the diastereoselectivity was low when using unsubstituted allenamides, the reaction is overall efficient and general, representing the most direct synthesis of both chemically and biologically interesting amido-spiro[2.2]pentane systems. With α-substituted allenamides, while the diastereoselectivity