for the regioselective palladium-catalyzeddirectarylation of a 6,7-difluorobenzo[d]imidazole using arylbromides as the coupling partners are described. The site selectivity of the arylation was found to be in favor of the C2-carbon of the difluorobenzo[d]imidazole; whereas the difluoro-substituted ring remained untouched, even in the presence of an excess of arylbromide. This method tolerates a
描述了使用芳基溴作为偶联伙伴的 6,7-二氟苯并 [ d ] 咪唑的区域选择性钯催化直接芳基化的条件。发现芳基化的位点选择性有利于二氟苯并[ d ]咪唑的C2-碳;而二氟取代的环保持不变,即使存在过量的芳基溴。此方法耐受多种在取代基的对位,间位-和邻位上的芳基溴位上,并且还Ñ含杂芳基溴化物。