Rearrangement of Quinoxalin-2-ones When Exposed to Enamines Generated in Situ from Ketones and Ammonium Acetate: Method for the Synthesis of 1-(Pyrrolyl)benzimidazolones
作者:Vakhid A. Mamedov、Nataliya A. Zhukova、Tat’yana N. Beschastnova、Victor V. Syakaev、Dmitry B. Krivolapov、Ekaterina V. Mironova、Anastasiya I. Zamaletdinova、Il’dar Kh. Rizvanov、Shamil K. Latypov
DOI:10.1021/jo502135d
日期:2015.2.6
The reaction of 3-benzoylquinoxalin-2(1H)-ones with enamines (generated in situ from ammonium acetate and the corresponding methylaryl(hetaryl)ketones) proceeds smoothly to give the corresponding substituted 1-(pyrrolyl)benzimidazolone derivatives in moderate yields through the novel rearrangement of 3-benzoylquinoxalin-2(1H)-ones involving a dual cleavage of the C3=N4 and C2-C3 bonds under mild conditions.