Enantioselective Synthesis of Angularly Substituted 1-Azabicylic Rings: Coupled Dynamic Kinetic Epimerization and Chirality Transfer
作者:Zachary D. Aron、Tatsuya Ito、Tricia L. May、Larry E. Overman、Jocelyn Wang
DOI:10.1021/jo4018099
日期:2013.10.4
A new strategy for enantioselective synthesis of azacyclic molecules in which dynamickinetic equilibration of diastereomeric iminium ions precedes a stereochemistry-determining sigmatropic rearrangement is reported. The method is illustrated by the synthesis, in high enantiomeric purity (generally 95–99% ee), of a variety of 1-azabicyclic molecules containing angular allyl or 3-substituted 2-propenyl