反应详情

A solution of 1-(4-chloro-phenyl)-5-methyl-1H-pyrazole-4-carboxylic acid [1-(5-bromo-pyridin-3-yl)-butyl]-amide (1.1 g, 2.5 mmol), copper(I) iodide (1.4 g, 7.4 mmol), sodium 3-methoxy-3-oxopropane-1-sulfinate (1.3 g, 7.4 mmol) in DMSO (10 mL) is heated at 130° C. for 1.5 hour. After cooling to room temperature, saturated aqueous sodium ammonium chloride (10 mL) is added and the resultant mixture is stirred for 1 hour. The crude mixture is poured into saturated aqueous sodium bicarbonate (250 mL) and extracted with EtOAc (1×250 mL, 2×100 mL). The combined organic layers are washed with brine (100 mL), dried over sodium sulfate, filtered and concentrated in vacuo. Purification by flash chromatography on silica gel (eluted with 25 to 75% EtOAc/hexanes) affords 1-(4-chloro-phenyl)-5-methyl-1H-pyrazole-4-carboxylic acid (1-pyridin-3-yl-butyl)-amide (159 mg, 16%) and 3-[5-(1-{[1-(4-chloro-phenyl)-5-methyl-1H-pyrazole-4-carbonyl]-amino}-butyl)-pyridine-3-sulfonyl]-propionic acid methyl ester (540 mg, 42%).

1. extractionextracted with EtOAc (1×250 mL, 2×100 mL)
2. washThe combined organic layers are washed with brine (100 mL)
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification by flash chromatography on silica gel (eluted with 25 to 75% EtOAc/hexanes)