Water → 2-[4-(4-Trifluoromethyl-benzenesulfonyl)-piperazin-1-yl]-thiazole-5-carboxylic acid methyl ester

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Reaction Steps

To a solution of compound 11 (200 mg, 0.886 mmol) in dichloromethane (7.5 mL) were added 4-trifluoromethyl benzenesulfonyl chloride (322 mg, 1.320 mmol) and triethylamine (220 mg, 2.169 mmol) under a N2 atmosphere. The reaction mixture was stirred at room temperature for 4 h. Water (10 mL) followed by dichloromethane (10 mL) were added to the reaction mixture and the organic layer was separated, dried on sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography using silica gel to give the compound 12f as a solid (333 mg, 86.9%). HPLC: 99.42% (Rt=11.936 min).

Provenance & Evidence