Water → 2,2-Dimethyl-n-[3-(trifluoromethyl)phenyl]propanamide

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A solution of pivaloyl chloride (3.62 g; 30 mmol) in 40 ml dry ether was added dropwise at room temperature to a mixture of 3-trifluoromethyl-aniline (4.83 g, 30 mmol) and triethylamine (4.25 ml, 30.5 mmol). This was stirred at room temperature for a period of 14 hours and then poured into 200 ml water, extracted with ether (2×100 ml). The combined ether extracts were washed successively with 0.5 HCl (100 ml); water (2×50 ml); 7% KOH (100 ml) and water (2×50 ml). The ether solution was dried with MgSO4 and concentrated in vacuo to give a white solid (7.23 gm, 98%, m.p. 112.5° C.). The 2,2-dimethyl-3'-trifluoromethyl-propionanilide was recrystallized with dichloromethane and petroleum ether mixture.

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