Natural products have long been important inspirations for the development of chemical methodologies, theories, and technologies, and ultimately, discoveries of new drugs and materials. Chemical syntheses have traditionally yielded individual or small groups of natural products; however, methodology development allowing the synthesis of a large collection of natural products remains scarce. Here, we
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)