One-pot concise syntheses of benzimidazo[2,1-a]isoquinolines by a microwave-accelerated tandem process
作者:Noriko Okamoto、Keisuke Sakurai、Minoru Ishikura、Kei Takeda、Reiko Yanada
DOI:10.1016/j.tetlet.2009.04.126
日期:2009.7
Direct, efficient syntheses of the benzimidazo[2,1-a]isoquinoline ring system have been achieved with 2-bromoarylaldehydes, terminal alkynes, and 1,2-phenylenediamines by a microwave-accelerated tandem process in which a Sonogashira coupling, 5-endo cyclization, oxidative aromatization, and 6-endo cyclization can be performed in a single synthetic operation.
直接的,所述苯并咪唑的合成效率[2,1-一个]异喹啉环系统已经通过微波加速的串联过程与2- bromoarylaldehydes,末端炔烃,和1,2-苯二胺实现,其中Sonogashira偶联,5-内切环化,芳构化氧化和6-内环化可以在单一的合成操作来执行。