Stereoselective Formal [3 + 3] Cycloaddition Approach to <i>cis-</i>1-Azadecalins and Synthesis of (−)-4<i>a</i>,8<i>a</i>-<i>diepi</i>-Pumiliotoxin C. Evidence for the First Highly Stereoselective 6π-Electron Electrocyclic Ring Closures of 1-Azatrienes
作者:Heather M. Sklenicka、Richard P. Hsung、Michael J. McLaughlin、Lin-li Wei、Aleksey I. Gerasyuto、William B. Brennessel
DOI:10.1021/ja020698b
日期:2002.9.1
Evidence is described here to support that a highlystereoselective 6pi-electron electrocyclic ring closure of 1-azatrienes is a key step in formal [3 + 3] cycloaddition or annulation reactions of chiral vinylogous amides with alpha,beta-unsaturated iminium salts. This would represent the first highlystereoselective 6pi-electron electrocyclic ring closure of 1-azatrienes. We have also unambiguously