Formal Syntheses of (±)-Stemonamine and (±)-Cephalotaxine

YM Zhao, P Gu, HJ Zhang, QW Zhang…

Index: Zhao, Yu-Ming; Gu, Peiming; Zhang, Hai-Jun; Zhang, Qing-Wei; Fan, Chun-An; Tu, Yong-Qiang; Zhang, Fu-Min Journal of Organic Chemistry, 2009 , vol. 74, # 8 p. 3211 - 3213

Full Text: HTML

Citation Number: 28

Abstract

A short and efficient approach to aza-quaternary pyrrolo [1, 2-a] azepine 8 and aza- quaternary indolizine 23, as the crucial intermediates for syntheses of stemonamine (1a) and cephalotaxine (1b), has been developed on the basis of the key intramolecular Schmidt reaction of symmetric azido-diones 5 and 18, respectively.