A novel and efficient protocol for the synthesis of diversely substituted 2,2'-bibenzimidazoles from the reaction of 3-cyanoquinoxalin-2(1H)-ones with 1,2-diaminobenzenes has been developed, which proceeds through sequential nucleophilic addition and electrophilic substitution followed by a Mamedov rearrangement. The synthetic utility of this strategy was illustrated by the concise, one-pot synthesis
已开发出一种新颖且有效的方案,该方案可通过3-cyanoquinoxalin-2(1H)-ones与1,2-二
氨基苯的反应合成各种取代的2,2'-联
苯并咪唑,该方案通过依次进行亲核加成和亲电取代来进行随后进行了Mamedov重排。简明的一锅合成5,5'-bi(2,2'-联
苯并咪唑)和2,2'-联
苯并咪唑的氮杂类似物说明了该策略的合成效用。