Hydrochloric Acid → Methyl 3-bromo-5-(methyl(propyl)carbamoyl)benzoate

Beteiligte Stoffe

Reaktionsschritte

Add N-methylpropylamine (5.14 g, 70.4 mmol) to a mixture of 5-bromo-isophthalic acid monomethyl ester and 5-bromo-isophthalic acid (18.2 g), 1-hydroxybenzotriazole (9.5 g, 70.4 mmol), and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (13.5 g, 70.4 mmol) in dichloromethane (200 mL). Stir the solution for 2 h at room temperature. Add saturated aqueous ammonium chloride (100 mL) and acidify the mixture with 1 N HCl. Filter away the precipitate, extract the filtrate with dichloromethane, wash the organic extracts with 1 N HCl, saturated aqueous sodium bicarbonate, saturated aqueous sodium chloride, dry (magnesium sulfate), concentrate and purify (silica gel chromatography, eluting with 30:70 ethyl acetate:hexanes) to give the title compound as an oil (10.1 g, 46%).

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