HCID 482688, compound → HCID 482690, compound

Participants

Reaction Steps

To a suspension of the 1-(2-fluoro-4-nitrophenyl)-6-fluoro-7-{4-[2-(4-methoxyphenyl)-2-oxoethyl]-1-piperazinyl}-4-oxo-1,4-dihydroquinoline-3-carboxylic acid [example 8] (0.58 g, 1 mmol) in ethanol (20 ml) was hydrogenated overnight in hydrogen in the presence of 10% Pd/C (25 mg) at room temperature. The reaction mixture was filtered and the filtrate was evaporated in vacuo to give a solid, the resulting solid was recrystallized from ethanol to afford 1-(4-amino-2-fluorophenyl)-6-fluoro-7-{4-[2-(4-methoxyphenyl)-2-oxoethyl]-1-piperazinyl}-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (0.28 g, 51%). Mp: 143° C. (dec). 1H NMR (DMSO-d6) δ 2.66 and 3.09 (two m, 8H), 3.85-3.84 (m, 5H), 6.05 (s, 2H), 6.47 (d, 1H, J=7.2), 6.58 (m, 2H), 7.02 (m, 2H), 7.36 (m, 1H), 7.97 (m, 3H), 8.62 (s, 1H), 15.06 (br s, 1H). Anal. Calcd. for C29H26F2N4O5•1.0 H2O: C, 61.48; H, 4.98; N, 9.89. Found: C, 61.81; H, 4.85; N, 9.81.

Provenance & Evidence