p-Bromobenzenesulfonyl chloride → 4-Bromo-N-[5-(cis-3,5-dimethyl-1-piperazinyl)-2-(methyloxy)phenyl]benzenesulfonamide

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Reaction Steps

A solution of 5-(cis-3,5-dimethyl-1-piperazinyl)-2-(methyloxy)aniline (D4) (1.20 g, 5.1 mmol) in dichloromethane (35 ml) was treated with morpholinomethyl-polystyrene HL resin (2.45 g, 4.2 mmol/g loading, 10.29 mmol) followed by 4-bromobenzenesulfonyl chloride (2.60 g, 10.2 mmol). The resulting solution was stirred at room temperature overnight (˜24hours)and then the resin filtered off with methanol and the solvent evaporated in vacuo. The residue was passed through an SCX column eluting first with methanol followed by 2M ammonia in methanol. The relevant fractions were collected, combined and the solvent evaporated in vacuo. The crude product was purified by Flashmaster causing an elution gradient of 0 to 10% methanol in dichloromethane. The relevant fractions were collected, combined and the solvent evaporated to afford the title compound (E106). MS (ES+) m/e 454/456 [M+H]+.

Provenance & Evidence