Hydrochloric Acid → 3-Chloro-4-(methoxycarbonyl)benzoic acid

Participants

Reaction Steps

To 3-amino-4-methoxycarbonylbenzoic acid (0.98 g, 5 mmol) suspended in 12 M hydrochloric acid (25 mL) and acetic acid (25 mL), an aqueous solution (10 mL) of sodium nitrite (0.35 g, 5 mmol) was added at −10° C., and the resulting solution was stirred for 30 minutes. The solution was added to copper chloride (I) (0.99 g, 10 mmol) in 12 M hydrochloric acid (25 mL) at −10° C., and the resulting reaction mixture was stirred at room temperature for 1 hour. After addition of ethyl acetate, the reaction mixture was washed with water, dried over magnesium sulfate, filtered through celite and purified by silica gel column chromatography to give 0.44 g of the desired product as a colorless solid (yield 39%).

Provenance & Evidence