Dimethylformamide → 7-Bromo-1,3,3-trimethylindolin-2-one

Participants

Reaction Steps

To a solution of 7-bromo-1,3-dihydro-2H-indol-2-one (200 mg, 0.94 mmol) in DMF (5 mL) were added cesium carbonate (676 mg, 2.07 mmol) and iodomethane (294 mg, 2.07 mmol). The reaction mixture was stirred at ambient temperature for 18 h, then partitioned between H2O (50 mL) and EtOAc (100 mL). The organic extract was dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by silica gel chromatography, eluting with a gradient of hexane:EtOAc—100:0 to 85:15, to give the title compound. MS: m/z=254 (M+1).

Provenance & Evidence