Synthesis of (−)-Stemoamide Using a Stereoselective <i>anti</i>-Aldol Step
作者:Horacio F. Olivo、Ricardo Tovar-Miranda、Efraín Barragán
DOI:10.1021/jo052364l
日期:2006.4.1
The synthesis of (−)-stemoamide was achieved in 11 steps from 5-acetoxy-N-crotyl pyrrolidinone. A chiral N-acyl thiazolidinethione was employed in a stereoselective addition to a cyclicN-acyliminiumion to install the required stereochemistry of carbon C9a. This iminiumionaddition product was employed in a stereoselective MgBr2-catalyzed anti-aldol reaction to install the required stereochemistry