反应详情

DIPEA (290 mg, 2.26 mmol) to a stirred solution of 5-pyridin-3-yl-1H-pyrazole-3-carboxylic acid hydrochloride (100 mg, 0.44 mmol) (prepared by the method used for the synthesis of Intermediate 29, starting from 3-acetylpyridine) in DMF (2 mL) followed by HOBt (63 mg, 0.46 mmol) and EDCI.HCl (90 mg, 0.46 mmol). After 2 minutes 2-amino-1-[4-(2-chloro-phenoxy)-piperidin-1-yl]-ethanone hydrochloride (150 mg, 0.44 mmol) (prepared according to Step 1 and 5 of the General Scheme) 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. Purification by recrystallisation from 10% EtOAc in hexane afforded 100 mg (51.5% Yield) of 5-pyridin-3-yl-1H-pyrazole-3-carboxylic acid {2-[4-(2-chloro-phenoxy)-piperidin-1-yl]-2-oxo-ethyl}-amide. LC/MS [M+H]+: 440, 96.47%. 1H NMR (300 MHz, DMSO-d6): δ 13.9 (s, 1H), 9.0 (m, 1H), 8.5 (m, 1H), 8.1 (m, 2H), 7.4 (m, 2H), 7.2 (m, 3H), 6.9 (m, 1H), 4.75 (m, 1H), 4.2 (m, 2H), 3.65 (m, 2H), 3.4 (m, 2H), 1.9 (m, 2H), 1.7 (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
5. customPurification
6. customby recrystallisation from 10% EtOAc in hexane