反应详情

To a solution of 1.4 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 in 20 ml of DMF was added 229 mg of sodium hydride under ice-cooling, followed by stirring at the same temperature for 10 minutes, and then 0.17 ml of methyl iodide was added thereto, followed by stirring under ice-cooling for 30 minutes. Water was added thereto, followed by extraction with ethyl acetate. The organic layer was washed with a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: chloroform-methanol) to obtain 545 mg of ethyl (3RS,4RS)-3-(2,4-dichlorophenyl)-2-{(1SR,2SR)-2-[methyl(methylsulfonyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylate as a colorless amorphous substance.

1. temperaturecooling
2. stirringby stirring under ice-
3. temperaturecooling for 30 minutes
4. extractionfollowed by extraction with ethyl acetate
5. washThe organic layer was washed with a saturated aqueous sodium chloride solution
6. dry with materialdried over anhydrous sodium sulfate
7. customthe solvent was evaporated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (eluent: chloroform-methanol)