Two Concise Enantioselective Total Syntheses of (−)-Glabrescol Implicate Alternative Biosynthetic Pathways Starting from Squalene
作者:Peng Yang、Pei-Fang Li、Jin Qu、Liang-Fu Tang
DOI:10.1021/ol3016836
日期:2012.8.3
The C2-symmetric (−)-glabrescol was synthesized in two steps from (10S,11R)-dihydroxy-10,11-dihydrosqualene or squalene with 50% or 10% overall yields, respectively. These highly efficient and biomimetic syntheses employed a base-promoted middle-to-terminal double epoxide-opening cascade, which constructs the five tetrahydrofuran rings in glabrescol in one operation.