作者:Nativitat Vails、Víctor M. Segarra、Maillo Luisa C、Joan Bosch
DOI:10.1016/s0040-4020(01)80944-3
日期:1991.1
Two synthetic routes to the 15-azayohimban ring system have been studied. The first one, based on a Pictet-Spengler condensation between tryptamine and piperidine acetal 4, gave very low yields of pentacycles 2a. The second, more efficient route involves as the crucial step a cyclization of a N-acyliminium cation generated from imide 11. The different course of the Pictet-Spengler reaction from amino
已经研究了两种合成途径来合成15-氮杂异戊二烯环系统。第一个是基于色胺和哌啶缩醛4之间的Pictet-Spengler缩合反应,产生的五环化合物2a的收率非常低。第二个更有效的途径涉及从酰亚胺11生成的N-酰亚胺阳离子的环化作为关键步骤。与氨基缩醛7相比,讨论了氨基缩醛4和8与Pictet-Spengler反应的不同过程。