(+)-Zwittermicin A. Rapid Assembly of C9−C15 and a Formal Total Synthesis
作者:Evan W. Rogers、Tadeusz F. Molinski
DOI:10.1021/jo901007v
日期:2009.10.16
A short, enantioselective synthesis of the C9−C15 portion of (+)-zwittermicin A is reported that exploits directional functionalization of the known hepta-2,5-diyne-1,7-diol by partial reduction of the two triple bonds followed by Sharpless asymmetric epoxidation and boron-directed double ring-opening with sodium azide under Miyashita conditions. Subsequent desymmetrization of the C2-symmetric diazidotetraol