- Photoinduced, Direct C(sp2)?H Bond Azo Coupling of Imidazoheteroarenes and Imidazoanilines with Aryl Diazonium Salts Catalyzed by Eosin Y
-
Herein, a greener approach to the eosin Y-Na2 catalyzed, C(sp2)?H bond azo coupling of imidazoheteroarene with aryl diazonium salts 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 main features of this reaction are that it provides high yields and is gram-scalable and applicable to biologically relevant imidazoheteroarenes and -anilines.
- Saba, Sumbal,Dos Santos, Caio R.,Zavarise, Bruno R.,Naujorks, Aline A. S.,Franco, Marcelo S.,Schneider, Alex R.,Scheide, Marcos R.,Affeldt, Ricardo F.,Rafique, Jamal,Braga, Antonio L.
-
p. 4461 - 4466
(2020/02/25)
-
- Cyclisation Reactions of some 3-Nitrosoimidazo-pyridines and -pyrimidines. Ring-opening/Ring-closure Reactions with Triethyl Phosphite: Reassignment by X-Ray Crystal Structure and Nuclear Magnetic Resonance
-
Deoxygenation of 3-nitroso-2-phenylimidazo-pyridines and -pyrimidines with triethyl phosphite does not lead to the products described in the literature as pyrido- and pyrimido-imidazoindoles (3) and (4), but to the open-chain derivatives, N-(2-pyri
- Teulade, Jean C.,Escale, Roger,Viols, Henry,Chapat, Jean P.,Grassy, Gerard,et al.
-
p. 2663 - 2667
(2007/10/02)
-
