反应详情

DIPEA (96 mg, 0.745 mmol) was added to a stirred solution of [(5-phenyl-isoxazole-3-carbonyl)-amino]-acetic acid (67 mg, 0.27 mmol) in DMF (3 mL) followed by HOBt (36 mg, 0.273 mmol) and EDCI.HCl (62 mg, 0.32 mmol). After 2 minutes 4-(3-trifluoromethyl-phenoxy)-piperidine hydrochloride (70 mg, 0.248 mmol) (prepared by method used for the synthesis of Intermediate 15) 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, dried over sodium sulfate and concentrated under reduced pressure The residue was purified by column chromatography (using 60-120 silica gel and 50% EtOAc in hexane as eluent) to afford 60 mg (34% Yield) of 5-phenyl-isoxazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide. LC/MS [M+H]+: 474, 70.17%. 1H NMR (300 MHz, DMSO-d6): δ8.7-8.6 (t, 1H), 8.0-7.9 (m, 2H), 7.6-7.5 (m, 4H), 7.4 (s, 1H), 7.3-7.26 (t, 3H), 4.8 (m, 1H), 4.2 (d, 2H), 3.9 (m, 1H), 3.7 (m, 1H), 3.5 (m, 1H), 3.3 (m, 1H), 2.0 (m, 2H), 1.8-1.4 (m, 2H).

1. additionwas added to the reaction mixture
2. extractionextracted with ethyl acetate
3. dry with materialdried over sodium sulfate
4. concentrationconcentrated under reduced pressure The residue
5. customwas purified by column chromatography (using 60-120 silica gel and 50% EtOAc in hexane as eluent)