Studies towards the Synthesis of Rapamycin: Regiocontrol in the Addition of Carbanions to Enantiomerically Pure Epoxides and the Formation of a Highly Substituted Tetrahydrofuran
作者:Philip Parsons、Kyungsoo Oh、David Cheshire
DOI:10.1055/s-2005-869868
日期:——
Reaction of trimethylaluminium, dimethyllithium cuprate and lithium tetramethylaluminate with the homochiral epoxide 8 has been studied. Intermolecular epoxide ring-opening was observed with dimethyllithium cuprate and lithium tetramethylaluminate, but acetal ring-opening followed by intramolecular epoxide ring-opening was observed with trimethylaluminium.
研究了
三甲基铝、二甲基
铜酸
锂和四甲基铝酸
锂与同手性
环氧化物 8 的反应。用二甲基
铜酸
锂和四甲基铝酸
锂观察到分子间
环氧化物开环,但用
三甲基铝观察到
缩醛开环,然后分子内
环氧化物开环。