反应详情

To 206 mg of the crude product of tert-butyl ({1-[2,6-difluoro-4-(1H-tetrazol-5-yl)phenyl]-4-phenylpiperidin-3-yl}methyl)[(1R)-1-(1-naphthyl)ethyl]carbamate were added 2.0 mL of 1,4-dioxane and 2.0 mL of a 4 M hydrogen chloride/1,4-dioxane solution, followed by stirring at room temperature for 2 days. The reaction mixture was concentrated under reduced pressure, and to the residue were then added ethyl acetate and a small amount of ethanol, followed by heating for dissolution. Hexane was added thereto, and the precipitate was isolated by filtration, and dried under reduced pressure to obtain 153 mg of (1R)—N-({1-[2,6-difluoro-4-(1H-tetrazol-5-yl)phenyl]-4-phenylpiperidin-3-yl}methyl)-1-(1-naphthyl)ethaneamine hydrochloride as a beige solid.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. temperatureby heating for dissolution
3. additionHexane was added
4. customthe precipitate was isolated by filtration
5. customdried under reduced pressure