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 cyclic N-acyl iminium ion to install the required stereochemistry of carbon C9a. This iminium ion addition product was employed in a stereoselective MgBr2-catalyzed anti-aldol reaction to install the required stereochemistry
由5-乙酰氧基-N-巴豆基吡咯烷酮以11个步骤完成(-)-硬脂酰胺的合成。将手性N-酰基噻唑烷硫酮立体选择性地加成到环状N-酰基亚胺基离子上,以安装所需的碳C 9a立体化学。将该亚胺离子加成产物用于MgBr 2催化的立体选择性抗醛醇缩合反应中,以安装所需的碳C8和C9立体化学。(-)-硬脂酰胺的X射线晶体分析证实了这些选择性反应的结构和立体化学结果。