A highly chemoselective and diastereoselective trifluoromethane sulfonic acid catalyzed addition of allyltributylstannanes to a steroidal aldehyde in aqueous media
作者:Teck-Peng Loh、Jia Xu、Qi-Ying Hu、Jagadese J. Vittal
DOI:10.1016/s0957-4166(00)00088-4
日期:2000.4
Trifluoromethane sulfonic acidcatalyzes the addition of allylic tributylstannanes to steroidal aldehyde 1 in aqueousmedia to give the corresponding homoallylic alcohols in high yields and high diastereoselectivities.
The development of catalytic and enantioselective transformations for the synthesis of all-carbon quaternary stereocenters has long been recognized as a significant challenge in organic synthesis. While considerable progress has been made in asymmetric allylations, their potential to functionalize the commonly used synthon, epoxide, remains largely underexplored. Here we demonstrate the first highly