dimethyl 4-(dimethylamino)-2-[2-(methylamino)-5-nitrophenyl]-4H-1,3-thiazine-5,6-dicarboxylate 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
以70%的产率得到2-dimethylamino-5-methyl-8-nitro-4-oxo-4,5-dihydro-1H-pyrrolo[3,2-c]quinoline-3-carboxylic acid methyl ester