反应详情

A Parr flask was charged with methanol (40 mL), ammonium hydroxide (10 mL), 3-nitro-7-(trifluoromethyl)-4-quinolinol (12.8 g, 49.6 mmol) and palladium on carbon (1.0 g of 10%). The mixture was placed on a Parr apparatus under a hydrogen atmosphere at 40 psi (2.8 Kg/cm2) for 4 hours. The mixture was filtered and the catalyst was washed with methanol and dichloromethane. The combined organics were concentrated under vacuum to provide a green solid. The solid was dissolved in methanol and then combined with 1 N hydrochloric acid in anhydrous diethyl ether (150 mL). A precipitate formed almost immediately. The reaction mixture was allowed to stir for 16 hours. The precipitate was isolated by filtration, washed with diethyl ether and then dried in a vacuum oven at 80° C. to provide 9.3 g of 3-amino-7-(trifluoromethyl)-4-quinolinol hydrochloride as an off-white solid.

1. filtrationThe mixture was filtered
2. washthe catalyst was washed with methanol and dichloromethane
3. concentrationThe combined organics were concentrated under vacuum
4. customto provide a green solid
5. customA precipitate formed almost immediately
6. customThe precipitate was isolated by filtration
7. washwashed with diethyl ether
8. customdried in a vacuum oven at 80° C.