Triethylamine → FR 121196

Reaction equation

Cl.Cl.[C:3]([N:6]1[CH2:11][CH2:10][N:9]([NH2:12])[CH2:8][CH2:7]1)(=[O:5])[CH3:4].[F:13][C:14]1[CH:19]=[CH:18][C:17]([S:20](Cl)(=[O:22])=[O:21])=[CH:16][CH:15]=1.C(N(CC)CC)C>ClCCl>[C:3]([N:6]1[CH2:11][CH2:10][N:9]([NH:12][S:20]([C:17]2[CH:18]=[CH:19][C:14]([F:13])=[CH:15][CH:16]=2)(=[O:22])=[O:21])[CH2:8][CH2:7]1)(=[O:5])[CH3:4]

Participants

Procedure

To a mixture of 1-acetyl-4-aminopiperazine dihydrochloride (540 mg) and 4-fluorobenzenesulfonyl chloride (535 mg) in dichloromethane (5 ml) was added triethylamine (1.2 ml) in a few minutes with stirring in an ice bath. After stirring for half an hour at the same temperature, the mixture was washed with brine, dried, and concentrated in vacuo. The residue was crystallized from ethanol and recrystallized from a mixture of ethanol and diethyl ether to Yield N-(4-acetyl-1-piperazinyl)-4-fluorobenzenesulfonamide (360 mg) as white crystals.