反应详情

温度

0 °C

The title compound was prepared from 7-difluoromethyl-5-(4-trifluoromethyl-phenyl)-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (example C.1) and 3-(morpholine-4-sulfonyl)-phenylamine [CAS 22184-97-0; commercially available] according to general procedure II as follows: to a stirred solution of a pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (1.0 mmol) in THF (4 ml) was added at room temperature DMF (2 drops), the solution was cooled to 0° C. and oxalylchloride (1.5 mmol) was added. The reaction mixture was stirred at room temperature for 3 h and evaporated to dryness. The precipitate was dissolved in pyridine (6 ml) and, while stirring at room temperature, 4-dimethylaminopyridine (1 mmol) and an aniline derivative (1 mmol) was added. The reaction mixture was allowed to stir at room temperature for 16 h, evaporated to dryness and the crude product purified by flash chromatography on silica gel (20 g, dichloromethane/methanol) to yield the product as a light yellow solid, which was further purified by crystallization from methanol/hexane. MS (ISP) 580.1 [(M−H)−]; mp 221° C.

1. customevaporated to dryness
2. dissolutionThe precipitate was dissolved in pyridine (6 ml)
3. stirringwhile stirring at room temperature
4. stirringto stir at room temperature for 16 h
5. customevaporated to dryness
6. customthe crude product purified by flash chromatography on silica gel (20 g, dichloromethane/methanol)