Triethylamine → HCID 44595546, Verbindung

At a temperature of 0° C., a solution of 3-difluoromethyl-1-methyl-1H-pyrazole-4-carbonyl chloride (1.94 g; 10.0 mmol) in dichloromethane (5 ml) was added dropwise to a stirred suspension of (4-chloro-phenyl)-(S)-pyrrolidin-2-yl-methanone hydrochloride (2.46 g; 10.0 mmol), which was prepared as described in example P16, and triethylamine (3.0 g; 30.0 mmol) in dichloromethane (25 ml). Dichloromethane (40 ml) was added to the mixture. The ice bath was removed and reaction mixture was allowed stirring for 3 hours. The reaction mixture was washed with 1M NaOH (20 ml), 1M HCl (20 ml) and saturated NaCl (20 ml) and then dried over Na2SO4. After removal of the solvent, the residue was purified by flash chromatography over silica gel (eluent:cyclohexane/ethyl acetate 1:19). 3.58 g (97.3% of theory) of (4-chloro-phenyl)-[(S)-1-(3-difluoromethyl-1-methyl-1H-pyrazole-4-carbonyl)-pyrrolidin-2-yl]-methanone was obtained in form of an oil. 1H NMR (400 MHz, CDCl3): δ 1.91-1.98 (m, 1H), 2.02-2.16 (m, 2H), 2.33-2.42 (m, 1H), 3.75-3.85 (m, 2H), 3.97 (s, 3H, NCH3), 5.61-5.65 (m, 1H), 6.99-7.28 (t, 1H, CHF2), 7.45-7.47 (d, 2H, Ar—H), 7.73 (s, 1H) 7.96-7.98 (d, 2H, Ar—H). MS [M+H]+ 368/370.