Bicyclic Guanidine Catalyzed Asymmetric Tandem Isomerization Intramolecular-Diels-Alder Reaction: The First Catalytic Enantioselective Total Synthesis of (+)-alpha-Yohimbine
作者:Wei Feng、Danfeng Jiang、Choon-Wee Kee、Hongjun Liu、Choon-Hong Tan
DOI:10.1002/asia.201500246
日期:2016.2
Hydroisoquinoline derivatives were prepared in moderate to good enantioselectivities via a bicyclic guanidine‐catalyzed tandem isomerization intramolecular‐Diels–Alder (IMDA) reaction of alkynes. With this synthetic method, the first enantioselective synthesis of (+)‐alpha‐yohimbine was completed in 9 steps from the IMDA products.