反应详情

温度

55 °C

To a solution of methyl 12-cyclohexyl-3-(1-methanesulfonylpiperidin-3-yloxy)-6,7-dihydro-5-oxa-7a -azadibenzo[a,e]azulene-9-carboxylate (47 mg, 0.085 mmol) in tetrahydrofuran (1 ml) and methanol (1 ml) was added 4N aqueous sodium hydroxide solution (0.5 ml), and the mixture was stirred at 55° C. for 2 hr. The mixture was adjusted to pH 6.5 by adding 1N hydrochloric acid (2 ml), and extracted with a mixed solvent of ethyl acetate and tetrahydrofuran. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. After filtration, the solvent was concentrated under reduced pressure. Hexane and ethyl acetate were added to the obtained residue, and the precipitate was collected by filtration, washed with hexane and dried in vacuo to give 12-cyclohexyl-3-(1-methanesulfonylpiperidin-3-yloxy)-6,7-dihydro-5-oxa-7a-azadibenzo[a,e]azulene-9-carboxylic acid (25 mg, yield 56%).

1. extractionextracted with a mixed solvent of ethyl acetate and tetrahydrofuran
2. washThe organic layer was washed with saturated brine
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationAfter filtration
5. concentrationthe solvent was concentrated under reduced pressure
6. additionHexane and ethyl acetate were added to the obtained residue
7. filtrationthe precipitate was collected by filtration
8. washwashed with hexane
9. customdried in vacuo