Aziridine−Allylsilane-Mediated Total Synthesis of (−)-Yohimbane
作者:Stephen C. Bergmeier、Punit P. Seth
DOI:10.1021/jo9825097
日期:1999.4.1
A total asymmetricsynthesis of (-)-yohimbane and ent-alloyohimbane is reported. The synthesis utilizes a novel aziridine-allylsilane cyclization reaction as a key step in the synthesis. Treatment of opticallypure aziridine-allylsilane 16 with BF(3).OEt(2) provided a mixture of aminomethyl substituted carbocycles trans-20a and cis-20b in excellent yield and modest diastereoselectivity (trans/cis 3:1)