Piperidine → HCID 13377181, compound

Participants

Reaction Steps

7-Amino-8,9-difluoro-2-methyl-6-oxo-1,2-dihydro-pyrrolo[3,2,1-ij]quinoline-5-carboxylic acid (0.5 g) and piperidine (0.8 g) are suspended in N-methylpyrrolidone (10 ml), and the mixture is heated at 110°-120° C. for 5 hours in a sealed tube. The reaction mixture is concentrated to dryness under reduced pressure, and to the residue is added ethyl acetate. The resulting crystals are separated by filtration and recrystallized from N,N-dimethylformamide to give 7-amino-8-fluoro-2-methyl-6-oxo-9-(1-piperidyl)-1,2-dihydro-pyrrolo[3,2,1-ij]quinoline-5-carboxylic acid (0.3 g) as yellow cubic crystals. m.p. 273°-276° C. (decomp.)

Provenance & Evidence