Hydroxyamine hydrochloride → HCID 474736, compound

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Reaction Steps

1-Ethyl-6-fluoro-7-{4-[2-hydroxyimino-2-(4-methoxy-phenyl)ethyl]-1-piperazinyl}-4-oxo-1,4-dihydroquinoline-3-carboxylic acid was prepared from 1-ethyl-6-fluoro-7-{4-[2-(4-methoxyphenyl)-2-oxoethyl]-1-piperazinyl}-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (0.47 g, 1 mmole) and hydroxylamine hydrochloride (0.14 g, 2 mol) by a method similar to that described for Example 3 (74% yield). Mp: 221° C. (dec). 1H NMR (DMSO-d6) δ 1.38 (t, 3H, J=7.2), 2.61 and 3.24 (two m, 8H), 3.41 and 3.77 (two s, 2H), 3.78 (s, 3H), 4.56 (q, 2H, J=7.2), 6.93 (m, 2H),7.15 (d, 1H, J=7.6),7.72 (m, 2H), 7.89 (d, 1H, J=13.6), 8.93 (s, 1H), 10.95 and 11.26 (two s, 1H), 15.29 (br s, 1H). Anal. Calcd. for C25H27FN4O5•0.25 H2O: C, 61.66; H, 5.69; N, 11.50. Found: C, 61.61; H, 5.70; N, 11.27.

Provenance & Evidence