Hydroxyamine hydrochloride → HCID 482674, compound

Participants

Reaction Steps

1-Ethyl-6,8-difluoro-7-{4-[2-(4-fluorophenyl)-2-hydroxyiminoethyl]-1-piperazinyl}-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid was prepared from 1-ethyl-6,8-difluoro-7-{4-[2-(4-fluorophenyl)-2-oxoethyl]-1-piperazinyl}-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid (0.24 g, 0.5 mmole) and hydroxylamine hydrochloride (0.07 g, 1 mmol) by a method similar to that described for Example 3 (70% yield). Mp: 201° C. (dec). 1H NMR (DMSO-d6) δ 1.42 (t, 3H, J=7.0), 2.58 and 3.29 (two m, 8H), 3.41 and 3.73 (two s, 2H), 4.57 (q, 2H, J=7.0), 7.44-7.87 (m, 4 H), 7.90 (d, 1H, J=12.0), 8.95 (s, 1H), 11.18 and 11.65 (two s, 1H), 14.92 (br s, 1H). Anal. Calcd. for C24H23F3N4O4•0.5 H2O: C, 57.95; H, 4.86; N, 11.26. Found: C, 57.91; H, 4.83; N, 11.12.

Provenance & Evidence