Silylcupration of allenes followed by reaction with enones. A new strategy for the synthesis of methylenecyclopentanols
作者:Asunción Barbero、Carlos García、Francisco J. Pulido
DOI:10.1016/s0040-4039(99)01264-2
日期:1999.9
Silylcupration of allene using phenyldimethylsilyl-copper followed by conjugated addition to α,β-unsaturated ketones affords oxoallylsilanes with different substitution patterns. When the former oxoallylsilanes are treated with a Lewis acid they undergo highly stereoselective allylsilane terminated cyclization leading to mono-, bi-, and tricyclic methylenecyclopentanols.
使用苯基二甲基甲硅烷基-铜对丙二烯进行甲硅烷基化,然后共轭添加到α,β-不饱和酮中,得到具有不同取代方式的氧代烯丙基硅烷。当用路易斯酸处理前一种氧代烯丙基硅烷时,它们会经历高度立体选择性的烯丙基硅烷封端的环化反应,从而生成单环,双环和三环亚甲基环戊醇。