Acid-Catalyzed Rearrangement of 3-Cyanoquinoxalin-2(1<i>H</i>)-ones When Exposed to 1,2-Diaminobenzenes: Synthesis of 2,2′-Bibenzimidazoles
作者:Vakhid A. Mamedov、Nataliya A. Zhukova、Milyausha S. Kadyrova、Victor V. Syakaev、Tat’yana N. Beschastnova、Daina N. Buzyurova、Il’dar Kh. Rizvanov、Shamil K. Latypov、Oleg G. Sinyashin
DOI:10.1021/acs.joc.9b01840
日期:2019.11.1
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。