Hydrochloric Acid → 6-[1-(3-Amino-2-pyridyl)piperazin-4-yl-carbonyl]nicotinic acid

Participants

Reaction Conditions

Reaction Steps

6-[1-(3-Amino-2-pyridyl)piperazin-4-yl-carbonyl]nicotinic acid methyl ester (3 g) was dissolved in methanol (25 ml) and with the addition of aqueous 1N-sodium hydroxide (20 ml), the mixture was stirred at 25° C. for 2 hours. With the slow addition of 3N-hydrochloric acid for neuturalization (pH=˜5), water (25 ml) was slowly added to the mixture for precipitate. After a 1-hour stirring, the precipitate was filtered, washed with water and dried to give a desired compound of 2.53 g (yield: 88%).

Provenance & Evidence