反应详情

To a solution of tert-butyl (1R,2R)-3-(tert-butyldimethylsilyloxy)-2-hydroxy-1-(4-(trifluoromethyl)phenyl)-propylcarbamate (14.50 g, 32.3 mmol) in 50 mL DCM at −15° C. were added TEA (4.57 g, 45.2 mmol), N,N-dimethylpyridin-4-amine (0.197 g, 1.61 mmol), and methanesulfonyl chloride (3.26 mL, 41.9 mmol). The mixture was allowed to warm to room temperature. Distilled water (200 mL) was added, and the aqueous phase was extracted into DCM (2×200 mL). The combined organic layers were washed with cold 5% HCl, saturated sodium bicarbonate, and water. The resulting product was then chromatographed eluting with 15% EtOAc in hexane. After removing the solvent, the product was obtained as a colorless oil (15 g, yield=88%). 1H NMR (400 MHz, CD3OD) δ ppm 0.11 (d, J=3.91 Hz, 6 H) 0.93-0.98 (m, 9 H) 1.44 (s, 9 H) 2.84 (s, 3H) 3.80-3.87 (m, 2H) 4.84-4.86 (m, 1H) 5.13 (d, J=5.28 Hz, 1H) 7.58 (d, J=8.02 Hz, 2H) 7.69 (d, J=8.22 Hz, 2H).

1. extractionthe aqueous phase was extracted into DCM (2×200 mL)
2. washThe combined organic layers were washed with cold 5% HCl, saturated sodium bicarbonate, and water
3. customThe resulting product was then chromatographed
4. washeluting with 15% EtOAc in hexane
5. customAfter removing the solvent