Cyclizations of Substituted Benzylidene-3-alkenylamines: Synthesis of the Tricyclic Core of the Martinellines
作者:Kristine E. Frank、Jeffrey Aubé
DOI:10.1021/jo990843c
日期:2000.2.1
the formation of different heterocycles including iminodibenzo[b,f][1,5]diazocines, hexahydropyrido[1, 2-c]quinazolin-6-ones, tetrahydropyrrolo[1,2-c]quinazolin-5-ones, 2-arylpiperidines, and 2-arylpyrrolidines. Tetrahydropyrrolo[1, 2-c]quinazolin-5-one 54, obtained via this new methodology, was used as an intermediate in the synthesis of the tricyclic ring system (65) of the martinellines.
马丁尼碱(1和2)是天然产物,具有有趣的生物活性和化学结构。在研究杂Diels-Alder途径通往这些分子的过程中,观察到交替的路易斯酸依赖性环化(2'-氨基-N'-叔丁氧基羰基-5'-氯亚苄基)-3-丁烯基胺(10)。各种亚胺与TMSOTf或TiCl(4)的反应导致形成不同的杂环,包括亚氨基二苯并[b,f] [1,5]重氮电影,六氢吡啶并[1,2-c]喹唑啉-6-ones,四氢吡咯啉[1,2-c]喹唑啉-5-酮,2-芳基哌啶和2-芳基吡咯烷。通过这种新方法获得的四氢吡咯并[1,2-c]喹唑啉-5-酮54被用作合成马替尼啉的三环系统(65)的中间体。