Room-Temperature Multicomponent Synthesis of 3,4-Dihydroquinoxalin-2-amine Derivatives Using Highly Ordered 3D Nanoporous Aluminosilicate Catalyst

Ammonium chloride-catalyzed green multicomponent synthesis of dihydropyrazine and tetrahydrodiazepine derivatives "on water"

This research describes a simple and efficient one-pot synthetic approach for the preparation of tetrahydrodiazepine and dihydropyrazine (or dihydroquinoxaline) derivatives in high yields in the presence of a substoichiometric amount of ammonium chloride as a green accelerator on water at 50 °C within 1-3 h.