Ethyl 5-Fluoro-4-{cyano(t-butoxycarbonyl)methyl}-2,3-dihydro-1-methyl-7-oxo-1H,7H-pyrido[3,2,1-ij]cinnoline-8-carboxylate 、
三氟乙酸 在
乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 17.5h,
以to obtain 410 mg of the subject compound (165)的产率得到Ethyl 4-Cyanomethyl-5-fluoro-1-methyl-2,3-dihydro-7-oxo-1H,7H-pyrido[3,2,1-ij]cinnoline-8-carboxylate