Chan–Lam N-arylation and C–H amination with heteroaromatic ring-NH: an approach to access extended-fused imidazo[1,2-a]-pyridines/pyrazines

Abstract

A di-amination strategy of areneboronic acids with heterocyclic azines via a tandem process of intermolecular Chan–Lam N-arylation and intramolecular arene C–H amination under copper(II)-mediated aerobic conditions has been realized. It constructs a fused imidazole scaffold and affords a convenient route to access imidazo[1,2-a]-fused pyridine, pyrazine and other heterocycles.