Total synthesis of Sceletium alkaloids (±)-joubertinamine, (±)-epijoubertinamine, (±)-tortuosamine and formal synthesis of (±)-mesembrine, (±)-N-formyltortuosamine
作者:Viraj A. Bhosale、Dattatraya U. Ukale、Suresh B. Waghmode
DOI:10.1039/c6nj00630b
日期:——
An efficient collective formal/total synthesis of Sceletium alkaloids and their seco-congeners has been reported. The bicyclic core of (±)-mesembrine, (±)-tortuosamine, and (±)-N-formyltortuosamine with all required functionalities including the characteristic quaternary benzylic carbon is achieved by employing the Wittig olefination–Claisen rearrangement protocol and synergistic Cu(I)/iminium catalyzed
已经报道了一种有效的集体形式/总合成的Sceletium生物碱及其同系同源物。通过使用维蒂希烯化-克莱森重排方案和协同作用的铜(I),可实现(±)-半膜胺,(±)-糖胺和(±)-N-甲酰tor糖胺具有所需功能的双环核,包括特征性的季苄基碳。)/亚胺催化O-乙酰基酮肟与α,β-不饱和醛(丙烯醛)的[3 + 3]缩合。