反应详情

温度

90 °C

To a stirred suspension of 4.9 g of a 50% oil dispersion of sodium hydride in 60 ml of dimethylformamide was added dropwise a solution a 10.0 g of 3-(1-methyl-4-piperidinyl)-1H-indazole in 80 ml of hot dimethylformamide. The reaction mixture was stirred for 1 hr and then 15.2 g of 3-fluorobenzotrifluoride was added. The reaction was heated at 90° C. for 22 hrs, cooled and poured into water. The aqueous mixture was extracted with ether. The ethereal extracts were dried over anhydrous magnesium sulfate and concentrated to give an oil. The oil was flash chromatographed (silica gel, diethylamine-ethyl acetate (1:9)). Evaporation of the appropriate fractions followed by recrystallization twice from hexane yielded 2.96 g (18%) of product, mp 103°-105° C.

1. temperaturecooled
2. extractionThe aqueous mixture was extracted with ether
3. dry with materialThe ethereal extracts were dried over anhydrous magnesium sulfate
4. concentrationconcentrated
5. customto give an oil
6. customchromatographed (silica gel, diethylamine-ethyl acetate (1:9))
7. customEvaporation of the appropriate fractions
8. customfollowed by recrystallization twice from hexane