反应详情

To a mixture of 2.0 g of ethyl(3RS,4RS)-3-(2,4-dichlorophenyl)-2-{(1SR,2SR)-2-[(methylsulfonyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylate, 10 ml of methanol, and 10 ml of THF was added 10 ml of a 1 M aqueous sodium hydroxide solution, followed by stirring at room temperature for 1 hour. The solution was acidified by the addition of 1 M hydrochloric acid, and then extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure to obtain 1.9 g of (3RS,4RS)-3-(2,4-dichlorophenyl)-2-{(1SR,2SR)-2-[(methylsulfonyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylic acid as a pale yellow crystal.

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with a saturated aqueous sodium chloride solution
3. dry with materialdried over anhydrous sodium sulfate
4. customThe solvent was evaporated under reduced pressure