A Formal Synthesis of Ionomycin Featuring a Permanganate-Mediated Oxidative Cyclisation
作者:Philip Kocieński、Yingfa Li、John Cooksey、Zhanghua Gao、Stephen McAteer、Thomas Snaddon
DOI:10.1055/s-0030-1258327
日期:2011.1
Key steps in a synthesis of the C17-C32 fragment of ionomycin are (a) an auxiliary-directed oxidative cyclisation of a diene with potassium permanganate to construct a tetrahydrofuran ring and four stereogenic centres in a single operation, and (b) a chain-appendage reaction featuring the alkylation of an enolsilane by an oxocarbenium ion generated from a 2-phenylsulfonyl-substituted tetrahydrofuran.
合成离子霉素 C17-C32 片段的关键步骤是:(a) 用高锰酸钾对二烯烃进行辅助定向氧化环化,从而在一次操作中构建一个四氢呋喃环和四个立体中心;(b) 利用从 2-苯磺酰基取代的四氢呋喃中生成的氧羰基离子对烯硅烷进行烷基化,从而进行链的延伸反应。