Completion of the Total Synthesis of Several Bioactive Sarpagine/Macroline Alkaloids including the Important NF-κB Inhibitor N4-Methyltalpinine
作者:Md Toufiqur Rahman、Veera Venkata Naga Phani Babu Tiruveedhula、Michael Rajesh Stephen、Sundari K. Rallapalli、Kamal P. Pandey、James M. Cook
DOI:10.3390/molecules27051738
日期:——
between a tertiary amine and an aldehyde function to allow efficient access to several biologically important alkaloids from this group. Herein, the enantiospecific total synthesis of the first known sarpagine/macroline alkaloid with NF-κB inhibitory activity, N(4)-methyltalpinine (as a chloride salt), as well as the anticancer alkaloids talpinine, O-acetyltalpinine, and macrocarpines F–G, are described.
关于重要且新兴的 C-19 甲基取代沙巴碱/大环碱生物碱类的一般合成策略的统一最终完成了几种生物活性生物碱的全合成。关键转化包括 ACE-Cl 介导的后期 N(4)-去甲基化以及无水酸介导的叔胺和醛官能团之间的分子内季半胺形成,从而可以有效地获得该组中的几种生物学上重要的生物碱。在此,对映体特异性全合成了第一个已知具有 NF-κB 抑制活性的沙帕碱/大果碱生物碱 N(4)-甲基塔平碱(氯化物盐),以及抗癌生物碱塔平碱、O-乙酰塔平碱和大果碱 F– G,进行了描述。