反应详情

In the same manner as described in Example 3, 8,9-difluoro-7-amino-2-methyl-6-oxo-1,2-dihydro-pyrrolo[3,2,1-ij]quinoline-5-carboxylic acid (3 g), anhydrous piperazine (4.6 g) and N-methylpyrrolidone (30 ml) are treated to give 8-fluoro-2-methyl-9-(1-piperazinyl)-7-amino-6-oxo-1,2-dihydro-pyrrolo[3,2,1-ij]quinoline-5-carboxylic acid (2.1 g), as pale yellow cubic crystals. m.p. 256°-259° C. (decomp.)

1. additionare treated