Dimethyl Sulfoxide → acetic acid 2-bromo-6-[6-(ethyl-methyl-amino)-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-benzyl ester

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Reaction Conditions

Reaction Steps

6-(Ethyl-methyl-amino)-3,4-dihydro-2H-isoquinolin-1-one (2.07 g, 10.1 mmol), acetic acid 2,6-dibromo-benzyl ester (6.25, 20.3 mmol), cuprous iodide (386 mg, 2.03 mmol) and potassium carbonate (1.40, 10.1 mmol) were deposited in a sealed vessel. 30 mL DMSO was added. Argon was bubbled through the mixture for 3 minutes and the lid was tightly closed. This was heated at 150° C. for 24 hours. Cuprous iodide (386 mg, 2.03 mmol) was added and the mixture was heated at 150° C. for an additional 24 hours. This was diluted with 300 mL ethyl acetate and 300 mL water. After stirring for 20 minutes, this was filtered through a pad of celite. The layers were separated. The ethylacetate layer was dried over anhydrous magnesium sulfate, concentrated in vacuo, and purified by flash chromatography (gradient elution 25 to 50% ethyl acetate/hexanes) to yield acetic acid 2-bromo-6-[6-(ethyl-methyl-amino)-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-benzyl ester (1.21 g, 2.81 mmol). MS (ESI) 433.0 (M+H)+.

Provenance & Evidence