1-Hydroxybenzotriazole → HCID 178523505, compound

Participants

Reaction Steps

DIPEA (76 mg, 0.59 mmol) was added to a stirred solution of 5-(2-trifluoromethyl-phenyl)-1H-pyrazole-3-carboxylic acid (43 mg, 0.167 mmol) (prepared by the method used for the synthesis of Intermediate 29, starting from (o-trifluoromethyl)acetophenone) in DMF (2 mL) followed by HOBt (24 mg, 0.176 mmol) and EDCI.HCl (34 mg, 0.176 mmol). After 2 minutes 2-amino-1-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethanone hydrochloride (prepared according to Step 1 and 5 of the General Scheme) (0.057 mg, 0.167 mmol) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, extracted with ethyl acetate and dried over sodium sulfate. The organic layer was concentrated under reduced pressure to afford the residue. The residue was purified by washing with chloroform to afford 51 mg (56% Yield) of 5-(2-trifluoromethyl-phenyl)-1H-pyrazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide. LC/MS [M+H]+: 541, 87.52%. 1H NMR (300 MHz, DMSO-d6): δ13.8 (d, 1H), 8.1 (m, 1H), 7.6 (m, 4H), 7.5 (t, 1H), 7.3 (t, 3H), 6.76 (s, 1H), 4.8 (m, 1H), 4.1 (d, 2H), 3.7 (m, 2H), 3.4 (m, 1H), 3.2 (m, 1H), 1.9 (m, 2H), 1.6 (m, 2H).

Provenance & Evidence