Methyl 4-Chloro-2,3-dihydro-1-methyl-7-oxo-1H,7H-pyrido-[3,2,1-ij]cinnoline-8-carboxylate 、 4-(cis (-) 3-Amino-4-methylpyrrolidin-1-yl)-5-fluoro-2,3-dihydro-1-methyl-7-oxo-1H,7H-pyrido[3,2,1-ij]cinnoline-8-carboxylic acid 在
盐酸 、
溶剂黄146 作用下,
以
乙醇 为溶剂,
以77%的产率得到4-Chloro-2,3-dihydro-1-methyl-7-oxo-1H,7H-pyrido[3,2,1-ij]cinnoline-8-carboxylic acid