Dichloromethane → N-[2-(1-piperidinyl)-5-(trifluoromethyl)phenyl]-p-toluenesulfonamide

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Reaction Steps

p-Toluenesulfonyl chloride (233 g, 1.22 mmol, commercially available product) and triethylamine (254 μl, 1.83 mmol) were sequentially added at room temperature to a dichloromethane (5 ml) solution of 2-(1-piperidinyl)-5-(trifluoromethyl)aniline (149 mg, 0.610 mmol), obtained as described in Referential Example 1-2. The resulting mixture was stirred for 60 hours. Water was added to the mixture, and the resulting mixture was extracted three times with ethyl acetate. The obtained organic layer was washed with a saturated sodium chloride solution, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20 g, hexane/ethyl acetate=10/1). Thus, N-[2-(1-piperidinyl)-5-(trifluoromethyl)phenyl]-p-toluenesulfonamide (GIF-0622) (243 mg, quant) was yielded as a colorless solid.

Provenance & Evidence