Ethyl Acetate → 1-Oxodihydroisoquinoline-4-carboxamide

Participants

Reaction Steps

To a solution of 323 mg of (3-{[({[(3RS,4RS)-3-(2,4-dichlorophenyl)-2-{(1SR,2SR)-2-[(mesyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinolin-4-yl]carbonyl}amino)oxy]methyl}-1,2,4-oxadiazol-5-yl)methyl acetate in 6.5 ml of methanol was added 66 mg of potassium carbonate, followed by stirring at room temperature for 3 hours. To the reaction solution was added ethyl acetate, followed by washing with a saturated aqueous sodium chloride solution. The organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: chloroform-methanol) and then recrystallized from ethyl acetate to obtain 157 mg of (3RS,4RS)-3-(2,4-dichlorophenyl)-N-{[5-(hydroxymethyl)-1,2,4-oxadiazol-3-yl]methoxy}-2-{(1SR,2SR)-2-(mesyl)amino]cyclohexyl}-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxamide as a white crystal.

Provenance & Evidence