Photoinduced, Direct C(sp
<sup>2</sup>
)−H Bond Azo Coupling of Imidazoheteroarenes and Imidazoanilines with Aryl Diazonium Salts Catalyzed by Eosin Y
作者:Sumbal Saba、Caio R. Dos Santos、Bruno R. Zavarise、Aline A. S. Naujorks、Marcelo S. Franco、Alex R. Schneider、Marcos R. Scheide、Ricardo F. Affeldt、Jamal Rafique、Antonio L. Braga
DOI:10.1002/chem.201905308
日期:2020.4.6
Herein, a greener approach to the eosin Y-Na2 catalyzed, C(sp2 )-H bond azo coupling of imidazoheteroarene with aryl diazoniumsalts is described, under acid free conditions. This direct photoredox process resulted in the corresponding azo products in good to excellent yields. Besides, this new approach could also be applicable to anilines, which is a poorly reactive substrate by other methods. The