Synthesis of 8-aryl substituted benzo[a]phenanthridine derivatives by consecutive three component tandem reaction and 6-endo carbocyclization
作者:Anil K. Mandadapu、Meena D. Dathi、Rajesh K. Arigela、Bijoy Kundu
DOI:10.1016/j.tet.2012.07.067
日期:2012.9
of benzo[a]phenanthridines involving multicomponent tandem reaction/carbocyclization in a sequential format is described. The reaction proceeds initially via formation of a 4-aryl-3-arylethynyl-isoquinoline from 2-bromobenzaldehyde/tert-butylamine/1,3-diyne in a three component format followed by a second ring closure either via gold/silver catalyzed intramolecular hydroarylation or via iodo-catalyzed
描述了一种简明的苯并[ a ]菲啶结构,涉及顺序形式的多组分串联反应/碳环化。该反应首先通过以三组分形式由2-溴苯甲醛/叔丁胺/ 1,3-二炔形成4-芳基-3-芳基乙炔基-异喹啉,然后通过金/银催化的分子内加氢芳基化进行第二次闭环或通过碘催化的区域选择性6-内切-亲电环化。该策略的显着特征涉及三组分反应,然后分两步将所得产物转化为结构复杂度增加的多杂环化合物。