Ethyl 2-(quinoxalin-2(1H)-on-3-yl)acetate and its mono- and dibromo derivatives in the synthesis of 2,2′-biquinoxalin-3,3′(4H,4’H)-diones

The synthetic scope of ethyl 2-(quinoxalin-2(1H)-on-3-yl)acetates and their mono- and dibromo derivatives in the synthesis of 2,2’-biquinoxaline-3,3’(4H,4’H)-diones was examined.