Stereoselective Synthesis of Tetrahydropyrans through Tandem and Organocatalytic Oxa-Michael Reactions: Synthesis of the Tetrahydropyran Cores of ent-(+)-Sorangicin A
作者:Kiyoun Lee、Hyoungsu Kim、Jiyong Hong
DOI:10.1002/ejoc.201101549
日期:2012.2
Tandem and organocatalyticoxa-Michaelreactions of α,β-unsaturated aldehydes were explored for the stereoselective synthesis of structurally complex tetrahydropyrans. Thestereoselective synthesis of 2,6-trans-tetrahydropyrans, which are thermodynamically unfavorable, was accomplished through a reagent-controlled, organocatalyticoxa-Michaelreaction. A temperature-dependent configurational switch