Dimethylformamide → 1-{2-[4-(4-Fluoro-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-1H-pyrazole-4-carboxylic acid ethyl ester

Participants

Reaction Steps

Protocol T was followed using 1H-Pyrazole-4-carboxylic acid ethyl ester, K2CO3, 2-Chloro-1-[4-(4-fluoro-phenyl)-piperazin-1-yl]-ethanone and DMF. Column chromatography using a solvent mixture (hexane/ethyl acetate=1/1) afforded the title compound as a white solid. 1H NMR (400 MHz, CDCl3): 8.2 (s, 1H), 7.92 (s, 1H), 6.94–7.0 (m, 2H), 6.82–6.88 (m, 2H), 5.0 (s, 2H), 4.1–4.2 (q, 2H), 3.74–3.82 (t, 2H), 3.62–3.72 (t, 2H), 3.0–3.12 (m, 4H), 1.28–1.42 (t, 3H). MS (ES) M+H expected 360.39, found 361.1.

Provenance & Evidence