The microwave irradiation of a series of 2-diazo-1,3-diketones in the presence of an o-phenylenediamine derivative triggered a domino Wolff rearrangement/nucleophilic addition/intramolecular imination sequence to provide a new synthetic entry to 1,3-dihydr-2H-1,5-benzodiazepin-2-ones, a class of molecules with important biological properties.
enantioselectivity (up to 98%). The absoluteconfiguration of the chiral product (R)‐1‐(3‐methyl 7‐nitroquinoxalin‐2‐yl) ethan‐1‐ol 2b was confirmed by X‐ray crystallography studies. The chiral R‐configuration of the products obtained was confirmed by absoluteconfigurationstudies and was assigned following anti‐Prelogs rule. Quinoxaline pharmacophores form a part of well‐known potent drug molecules;