反应详情

BBr3 (4.75 mL, 47.5 mmol, in CH2Cl2) was added to a cold solution (ice-bath) of intermediate 18 (3.36 g, 18.98 mmol) in CH2Cl2 (100 mL). The mixture was then warmed to rt and stirred overnight. Water was carefully added dropwise to quench the reaction. EtOAc was added and the mixture was washed with water, brine, dried over anhydrous MgSO4, filtered and concentrated to afford 7-hydroxy-3,4-dihydroisoquinolin-1(2H)-one (intermediate 19) (2.46 g, 80%) as a white solid. mp: 201-203° C.

1. customto quench
2. customthe reaction
3. washthe mixture was washed with water, brine
4. dry with materialdried over anhydrous MgSO4
5. filtrationfiltered
6. concentrationconcentrated