On December 2, 2016, Youn, So Won; Kim, Yi Hyun published an article.Name: 3-Phenyl-1H-imidazo[4,5-b]pyridin-2(3H)-one The title of the article was Pd(II)/Ag(I)-Promoted One-Pot Synthesis of Cyclic Ureas from (Hetero)Aromatic Amines and Isocyanates. And the article contained the following:
A simple and facile one-pot reaction has been developed to afford a diverse range of N,N’-disubstituted benzimidazolones and imidazopyridinones containing two differently substituted N atoms. A cooperative Pd(II)/Ag(I) system promotes the sequential addition/intramol. C-H amidation reaction of (hetero)aromatic amines and isocyanates, leading to the formation of two C-N bonds. A mechanism involving radical intermediates generated by single-electron transfer (SET) in the presence of a Ag2CO3 oxidant and Pd(OAc)2 Lewis acid is proposed. This protocol offers an operationally easy, simple, and robust approach with the use of readily available starting materials, good functional group tolerance, and high efficiency. The experimental process involved the reaction of 3-Phenyl-1H-imidazo[4,5-b]pyridin-2(3H)-one(cas: 41010-50-8).Name: 3-Phenyl-1H-imidazo[4,5-b]pyridin-2(3H)-one
The Article related to disubstituted benzimidazolone imidazopyridinone preparation palladium silver promoted sequential reaction, cyclic urea preparation addition amidation hetero aromatic amine isocyanate and other aspects.Name: 3-Phenyl-1H-imidazo[4,5-b]pyridin-2(3H)-one
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem