Bumetanide → N,N-diethyl 3-aminosulfonyl-5-butylamino-4-phenoxybenzamide

Participants

Reaction Steps

Bumetanide (1.16 g, 3.2 mmol) was dissolved in dichloromethane (10 mL) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC, 690 mg, 3.6 mmol) was added. After 5 minutes N-hydroxybenzotriazole (HOBt, 498 mg, 3.6 mmol) was added and the solution was stirred for an additional 5 minutes. Diethylamine (332 uL, 3.2 mmol) was added and the reaction was stirred for 2 hours. The reaction was washed with saturated sodium bicarbonate, water and brine, and dried with magnesium sulfate. The dichloromethane was removed under reduced pressure to yield 860 mg (65%) of pure N,N-diethyl 3-aminosulfonyl-5-butylamino-4-phenoxybenzamide.

Provenance & Evidence