1-Methylpiperazine → 1-(5-Chloro-thiophene-2-sulfonyl)-4-methyl-piperazine hydrochloride

Participants

Reaction Steps

To a stirred solution of commercially available 5-chloro-thiophene-2-sulfonyl chloride (1.0 g, 4.61 mmol) in pyridine (10 mL) was added at room temperature commercially available 1-methylpiperazine (0.46 g, 4.61 mmol). The reaction mixture was stirred at room temperature for 1 h and evaporated. The crude product was further purified by flash chromatography (ethyl acetate/methanol) to yield the title compound (0.92 g, 63%) as an off-white solid. MS (ISP) 280.9 [(M+H)+], mp 242° C.

Provenance & Evidence