作者: Evan W. Rogers , Tadeusz F. Molinski
DOI: 10.1021/JO901007V
关键词: Epoxide 、 Total synthesis 、 Chemistry 、 Desymmetrization 、 Enantiomer 、 Enantioselective synthesis 、 Stereochemistry 、 Sharpless epoxidation 、 Chemical synthesis 、 Azide
摘要: A short, enantioselective synthesis of the C9-C15 portion (+)-zwittermicin is reported that exploits directional functionalization known hepta-2,5-diyne-1,7-diol by partial reduction two triple bonds followed Sharpless asymmetric epoxidation and boron-directed double ring-opening with sodium azide under Miyashita conditions. Subsequent desymmetrization C(2)-symmetric diazidotetraol product converges upon (-)-3--the enantiomer key intermediate our earlier structural proof (-)-zwittermicin A--and constitutes a formal (+)-zwitttermicin A.