An Alternative Synthesis of Dolby−Weinreb Enamine en Route to Cephalotaxine
作者:Bao-Chun Ma、Yong-Qiang Wang、Wei-Dong Z. Li
DOI:10.1021/jo050143+
日期:2005.5.1
A novel alternative synthesis of the Dolby−Weinreb enamine (2) was achieved from readily available amino dione 6 by a mild transannular Clemmensen−Clemo−Prelog−Leonard reductive rearrangement, which thus constitutes a formal total synthesis of cephalotaxine.