反应详情

To an ice-cooled solution of 2-methyl-4-o-tolyl-thiazol-5-ylamine (55.0 mg, 0.27 mmol, 1.0 equiv) and diisopropylethylamine (52.0 mg, 0.41 mmol, 1.5 equiv) in dichloromethane (10 mL) was added a solution of 5-chloropyrazolo[1,5-c]pyrimidine-3-carbonyl chloride (58.0 mg, 0.27 mmol, 1.0 equiv) in dichloromethane (5 mL). The reaction mixture was warmed to ambient temperature and stirred overnight. The mixture was washed with water and saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered, and concentrated under vacuum. Purification by flash column chromatography on silica gel (gradient: 0 to 3% methanol in dichloromethane) afforded 74.0 mg (73%) of 5-chloro-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (2-methyl-4-o-tolyl-thiazol-5-yl)-amide as a solid. LCMS (ESI) m+H=384.0 (mono chlorinated isotope pattern); 1H NMR (400 MHz, CDCl3) δ: 9.73 (s, 1H), 8.70 (s, 1H), 8.63 (d, 1H), 7.44-7.30 (m, 4H), 6.93 (d, 1H), 2.72 (s, 3H), 2.31 (s, 3H).

1. washThe mixture was washed with water and saturated aqueous sodium chloride solution
2. dry with materialdried over magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated under vacuum
5. customPurification by flash column chromatography on silica gel (gradient: 0 to 3% methanol in dichloromethane)