N-甲基哌嗪 、
9-fluoro-2,3-dihydro-3-methyl-10-methylsulphonyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid 以
乙腈 为溶剂,
反应 14.0h,
以84%的产率得到2,3-dihydro-3-methyl-9-(4-methyl-1-piperazinyl)-10-methylsulphonyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid