反应详情

温度

0 °C

At 0° C., trifluoroacetic acid (1.5 ml) was added to a solution of N-((1R)-1-(N-(2-(2-(methylsulfonylamino)phenyl)ethyl)-N-methylcarbamoyl)-2-(2-naphthyl)ethyl)-N-methylcarbamic acid tert-butyl-ester (245 mg, 0.45 mmol) in dichloromethane (1.5 ml). The reaction mixture was stirred for 1.75 h at 0° C. Dichloromethane (5 ml) and a saturated aqueous solution of sodium hydrogen carbonate (6 ml) were added successively. Solid soidum hydrogen carbonate was added until pH 7 was obtained. The phases were separated. The aqueous phase was extracted with dichloromethane (3×50 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 (30 g), using dichloromethane/methanol/25% aqueous ammonia (100:10:1) as eluent, to give 155 mg of (2R)-N-(2-(2-(methylsulfonylamino)phenyl)ethyl)-N-methyl-2(methylamino)-3-(2-naphthyl)propionamide.

1. customwas obtained
2. customThe phases were separated
3. extractionThe aqueous phase was extracted with dichloromethane (3×50 ml)
4. dry with materialThe combined organic layers were dried over magnesium sulfate
5. customThe solvent was removed in vacuo
6. customThe crude product was purified by flash chromatography on silica (30 g)