1-(2,4-Xylyl)piperazine → [4-(2,4-Dimethylphenyl)piperazin-1-yl][4-(1,1-dioxo-1lambda6-isothiazolidin-2-yl)-2-methanesulfonylphenyl]methanone

Participants

Reaction Steps

4-(1,1-Dioxo-1λ6-isothiazolidin-2-yl)-2-methanesulfonylbenzoic acid (335 mg) described in Preparation Example 22, 1-(2,4-dimethylphenyl)piperazine (199 mg), 1-hydroxybenzotriazole 1 hydrate (142 mg) were dissolved in N,N-dimethylformamide (5 mL), 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide hydrochloride (202 mg) was added, and the mixture was stirred at room temperature overnight. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and the solvent was evaporated. The obtained residue was purified by column chromatography (chloroform:methanol) to give the title compound (436 mg).

Provenance & Evidence