Phthaloyl chloride → 2-Bromo-4,5-dimethoxyl-(2-phthalimidoethyl)benzene

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Reaction Steps

2-Bromo-4,5-dimethoxylbenzeneethanamine (3.5 g 13.2 mmol) was dissolved and stirred in 50 mL dry acetonitrile. 2.14 mL (1.1 equiv) phthaloyl dichloride and 7 mL (3 equiv) Hünig's base were added. The mixture was stirred at room temperature overnight. Acetonitrile was removed; the remaining product was taken up in dichloromethane and washed with basic water (pH=11). The aqueous wash was extracted with dichloromethane 15 mL×3. The organic fractions were combined and dried over sodium sulfate. Solvent was removed to give the crude product, which was then purified by column chromatography. Calculated yield: 1.8 g (34%).

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