New chiral recognition of chiral tin(II) enolates toward cyclic acyl iminium species. Asymmetric total synthesis of (−)-supinidine
作者:Yoshimitsu Nagao、Dal Wei-Min、Ochiai Masahito
DOI:10.1016/s0040-4039(00)82286-8
日期:——
Diastereoselective alkylation of chiral tin(II) enolates onto cyclic acyl iminium ion proceeded in a different chiral recognition mode from the case of onto the cyclic acyl imines . This new diastereoselective alkylation was efficiently utilized for an asymmetric totalsynthesis of (−)-supinidine ().
The scope and mechanism of the asymmetric alkylation of chiral tin (II) enolate 10 with cyclic acyl iminium ion 5 were investigated. An application of the reaction to the asymmetricsynthesis of (-)-supinidine was also achieved.