A "(+)-sparteine-like" chiral diamine, readily synthesized in three steps from (-)-cytisine, has been evaluated in four different asymmetric transformations; in each case, selectivity in an enantiocomplementary fashion to (-)-sparteine was observed.
Stereocontrolled synthesis and alkylation of cyclic β-amino esters: asymmetric synthesis of a (–)-sparteine surrogate
作者:Jean-Paul R. Hermet、Aurélien Viterisi、Jonathan M. Wright、Matthew J. McGrath、Peter O'Brien、Adrian C. Whitwood、John Gilday
DOI:10.1039/b712503h
日期:——
A convenient method for the stereoselective synthesis of cyclic beta-amino esters from an iodo alphabeta-unsaturated ester and alpha-methylbenzylamine is described. Subsequent enolate generation and alkylation proceeds with complete stereocontrol, with the two stereogenic centres working together. In this way, a functionalised piperidine suitable for alkaloid natural product synthesis was prepared