公开了使用2-氨基苯并噻唑和邻卤代肉桂酸同类物的铜催化的串联方法,其结合区域选择性的N-芳基化,然后进行氮杂-迈克尔加成。该过程以中等至良好的产率产生了多种多样的四环5 H-苯并噻唑并[3,2- a ]喹唑啉衍生物。当前的串联反应似乎是通过2-氨基苯并噻唑的同时开环和S-芳基化而进行的,得到邻-氰酰胺取代的二芳基硫醚中间体。这样生成的中间体可能经历了前所未有的Truce-Smiles型重排,涉及S-到N-芳基迁移,然后重新形成噻唑环和分子内氮杂-Michael加成物,得到标题产物。
6,7-Dihydro-5H-pyrrolo[1,2-a] imidazoles as potent and selective α1A adrenoceptor partial agonists
作者:Lee R. Roberts、Paul V. Fish、R. Ian Storer、Gavin A. Whitlock
DOI:10.1016/j.bmcl.2009.03.166
日期:2009.6
Novel pyrroloimidazoles have been identified as potent partial agonists of the alpha(1A) adrenergic receptor, with good selectivity over the alpha(1B), alpha(1D) and alpha(2A) receptor subtypes. Pyrimidine 19 possessed attractive CNS drug-like properties with good membrane permeability and no evidence for P-gp mediated efflux. (C) 2009 Elsevier Ltd. All rights reserved.