4-Toluenesulfonyl chloride → 2-Trifluoromethyl-1-(2,4,6-trimethylbenzenesulfonyl)aziridine

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To a solution of 690 mg (2.22 mmol) of 2,4,6-trimethyl-N-(2,2,2-trifluoro-1-hydroxymethylethyl)benzenesulfonamide in 10 mL of THF was added 180 mg (4.5 mmol) of 60% sodium hydride in mineral oil in several portions followed by 475 mg (2.5 mmol) of p-toluenesulfonyl chloride. The mixture stirred at room temperature over night and was then diluted with water and extracted with three 20 mL portions of ethyl acetate. The combined organic layers were washed with three 20 mL portions of saturated aqueous sodium bicarbonate solution, 20 mL of brine, and two 20 mL portions of saturated aqueous ammonium chloride solution, dried over magnesium sulfate, filtered, and concentrated in vacuo to afford 650 mg (99%) of 2-trifluoromethyl-1-(2,4,6-trimethylbenzenesulfonyl)aziridine as an oil which solidified to a waxy solid upon standing.

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