Dimethylformamide → 2-{2-[4-(4-Fluoro-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-5-propyl-2H-pyrazole-3-carboxylic acid ethyl ester

Participants

Reaction Steps

Protocol T was followed using 5-Propyl-2H-pyrazole-3-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): 6.94–7.0 (m, 2H), 6.82–6.90 (dd, 2H), 6.7 (s, 1H), 5.5 (s, 2H), 4.26–4.32 (q, 2H), 3.62–3.82 (m, 4H), 3.04–3.18 (m, 4H), 2.58–2.64 (t, 2H), 1.64–1.74 (m, 2H), 1.34–1.38 (t, 3H), 0.96–1.0 (t, 3H). 13C NMR (400 MHz, CDCl3): 165, 160, 156.2, 152.4, 146.8, 132.8, 118.2, 118.1, 115.8, 115.4, 110.2, 61, 53, 50.6, 50.2, 45, 42, 30, 22.8, 14.2, 14.

Provenance & Evidence