Water → (2R)-2-methylamino-3-phenyl-N-(2,2,2-trifluoroethyl)propionamide

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Reaction Conditions

Reaction Steps

N-Methyl-N-((1R)-2-phenyl-1-((2,2,2-trifluoroethyl)carbamoyl)ethyl)carbamic acid tert-butyl ester (3.45 g(9.57 mmol) was dissolved in dichloromethane (8 ml). The solution was cooled to 0° C. Trifluoroacetic acid (8 ml) was added. The reaction mixture was stirred for 45 min at 0° C. A saturated aqueous solution of sodium hydrogen carbonate (40 ml) was added. Solid sodium hydrogen carbonate was added until pH 7. Water (100 ml) was added, until a clear solution was obtained. The phases were separated. The aqueous phase was extracted with dichloromethane (3×30 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (180 g), using dichloromethane/methanol/25% aqueous ammonia as eluent to give 1.13 g of (2R)-2-methylamino-3-phenyl-N-(2,2,2-trifluoroethyl)propionamide.

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