Dimethyl Sulfoxide → 2-(3-Bromo-2-methyl-phenyl)-6-dimethylamino-3,4-dihydro-2H-isoquinolin-1-one

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Reaction Conditions

Reaction Steps

6-Dimethylamino-3,4-dihydro-2H-isoquinolin-1-one (150 mg, 0.789 mmol), cuprous iodide (30 mg, 0.16 mmol) and potassium carbonate (109 mg, 0.789 mmol) were deposited in a sealed vessel. 3 mL DMSO and 2,6-dibromotoluene (395 mg, 1.58 mmol) were added. Argon was bubbled through the mixture for 2 minutes and the lid was tightly closed. This was heated at 150° C. for 24 hours. Cuprous iodide (30 mg, 0.16 mmol) was added and the mixture was heated at 150° C. for an additional 24 hours. This was diluted with dichoromethane and filtered through a pad of celite. The filtrate was partitioned between dichloromethane and 5% aq. ammonium hydroxide. The dichloromethane layer was washed with brine. The combined aqueous layers were washed with dichloromethane. The combined dichloromethane layers were dried over anhydrous magnesium sulfate, concentrated in vacuo, and purified by flash chromatography (gradient elution 25 to 50% ethyl acetate/hexanes) to yield 2-(3-Bromo-2-methyl-phenyl)-6-dimethylamino-3,4-dihydro-2H-isoquinolin-1-one (181 mg, 0.504 mmol). MS (ESI) 361.1 (M+H)+.

Provenance & Evidence