Enantioselective Synthesis of (−)-Gilbertine via a Cationic Cascade Cyclization
作者:Jan Jiricek、Siegfried Blechert
DOI:10.1021/ja0399021
日期:2004.3.1
Described is the first enantioselectivesynthesis of (-)-gilbertine (2), a member of the uleine-type family, and the determination of the absolute configuration of this natural product is reported. The key step employs a cationic cascade reaction for a tetrahydropyrane and piperidine ring formation and the construction of the pentacyclic framework in one step. The synthetic strategy utilizes the Shibasaki