反应详情

Benzoyl isothiocyanate (6 g) was added dropwise to a solution containing ((2S,3R,4S)-4-amino-4-(2,3-difluorophenyl)-2-((trityloxy)methyl)tetrahydrofuran-3-yl)methanol, obtained in Preparation Example 1-(3), (15.42 g) in CH2Cl2 (80 mL), and the mixture was stirred at RT for 18 h. EtOAc was added and the mixture was extracted with NaHCO3 (3×100 mL), dried over MgSO4, evaporated, and the residue was purified by silica gel column chromatography (0% to 30% EtOAc in hexanes) to obtain the title compound (19.06 g). 1H-NMR (400 MHz, CDCl3) δ (ppm): 3.00 (t, J=6.2 Hz, 1H), 3.08-3.17 (m, 1H), 3.26 (dd, J=10.2, 4.2 Hz, 1H), 3.38 (dd, J=10.2, 3.9 Hz, 1H), 3.73-3.95 (m, 2H), 4.04-4.12 (m, 1H), 4.54 (d, J=9.6 Hz, 1H), 4.69 (d, J=9.9 Hz, 1H), 7.05-7.68 (m, 21H) 7.88 (d, J=7.1 Hz, 2H), 8.88 (s, 1H), 11.83 (s, 1H)

1. extractionthe mixture was extracted with NaHCO3 (3×100 mL)
2. dry with materialdried over MgSO4
3. customevaporated
4. customthe residue was purified by silica gel column chromatography (0% to 30% EtOAc in hexanes)