反应详情

To tert-butyl (2S,3S)-1-(tert-butyldimethylsilyloxy)-3-(4-(trifluoromethyl)phenyl)butan-2-ylcarbamate (2000 mg, 4.5 mmol) in 25 mL ether at 0° C. was added 1.0 M tetrabutylammonium fluoride in THF (8.9 mL, 8.9 mmol). After the addition, the ice-bath was taken away. The reaction progress was monitored by TLC. After 60 minutes, the solvent was evaporated and 100 mL diethyl ether was added. The organic layer was washed with water and brine solution, and then dried over sodium sulfate. The crude product was then chromatographed eluting with 30% EtOAc in hexane. After removing the solvent, the desired product was obtained as a white solid (1.25 g, 84%). 1H NMR (400 MHz, CD3OD) δ ppm 1.26-1.31 (m, 9H) 1.34 (d, J=7.04 Hz, 3H) 3.02-3.13 (m, 1H) 3.61-3.67 (m, 2H) 3.75 (dd, J=8.71, 4.60 Hz, 1H) 7.44 (d, J=8.02 Hz, 2H) 7.57 (d, J=8.22 Hz, 2H).

1. additionAfter the addition
2. customthe solvent was evaporated
3. addition100 mL diethyl ether was added
4. washThe organic layer was washed with water and brine solution
5. dry with materialdried over sodium sulfate
6. customThe crude product was then chromatographed
7. washeluting with 30% EtOAc in hexane
8. customAfter removing the solvent