Catalytic oxidation of different lignin over Ni-MOFs based catalyst in oxygen: Effect of catalysts and solvents

General synthesis of secondary imines via reductive coupling of carbonyl and nitro compounds employing a reusable cobalt catalyst

“…20,21 In recent years, nitrogen-doped carbon material-supported transition metal nanoparticles were extensively studied for several types of chemical reactions, including the reductive amination of aldehydes into primary amines, because of their high activity and high stability. 3,22–24 In this work, a new kind of nitrogen-doped carbon-encapsulated reusable Co nanoparticles were facilely prepared by the pyrolysis of urea, chitosan and cobalt nitrate composite, and the optimal catalyst was found to be robust for the reductive amination of aldehydes with aqueous ammonia solution towards the selective synthesis of secondary imines under mild conditions. Furthermore, this method can be extended for the reductive cross-coupling of aldehydes with nitro compounds for the synthesis of unsymmetric secondary imines.…”