The preparation of a variety of tetracyclic ring systems by palladium(0)-catalyzed cyclization of 2-bromobenzyloxy-substituted coumarins and quinolones is described. The process has been found to be a viable method for regioselective synthesis of the corresponding products in very good to excellent yield.
描述了通过
钯 (0) 催化的 2-
溴苄氧基取代的
香豆素和喹诺
酮类化合物的环化制备各种四环系统。已发现该方法是区域选择性合成相应产物的可行方法,产率非常好至极好。