1-carbethoxycarbonylmethyl-2-amino-3-carbamoyl-quinoxalinium bromide 以
乙醇 为溶剂,
反应 1.5h,
以to obtain 0.55 g of ethyl 4-carbamoyl-imidazo-[1,2-a]-quinoxaline-2-carboxylate as a pale yellow crystalline solid的产率得到ethyl 4-carbamoyl-imidazo-[1,2-a]-quinoxaline-2-carboxylate