Novel multicomponent one-pot synthesis of tetrahydro-1H-1,5-benzodiazepine-2-carboxamide derivatives.

A new approach to the design of multicomponent reactions is introduced. As a result, the novel one-pot synthesis of 2,3,4,5-tetrahydro-1 H-1,5-benzodiazepine-2-carboxamide derivatives using an aromatic diamine, a linear or cyclic ketone, an isocyanide, and water in the presence of a catalytic amount of p-toluenesulfonic acid at ambient temperature in high yields is described.