反应详情

To a solution of the product of Step 1 (250 mg, 0.552 mmol) in CH2Cl2 (5 ml) were added EtOH (0.05 mL) and Deoxo-fluor (0.509 ml, 2.76 mmol). The reaction was stirred at room temperature for 30 minutes, diluted with water (5 mL) and extracted with EtOAc (2×10 mL). The combined organic layers were washed with brine, dried (MgSO4), filtered and evaporated. Column chromatography on silica (gradient elution, 0 to 25% EtOAc in hexanes) afforded the title compound (0.186 g, 0.409 mmol, 74% yield) as a pale yellow foam. MS ESI: [M+H]+ m/z 455.0. 1H NMR (500 MHz, DMSO-d6) δ 10.29 (s, 1H), 8.83 (d, J=4.9, 1H), 8.10 (d, J=2.7, 1H), 8.03 (bs, 1H), 7.47 (bs, 1H), 7.28 (d, J=4.9, 1H), 7.20 (bs, 1H), 2.94-2.89 (m, 2H), 2.69-2.66 (m, 2H), 2.39-2.75 (m, 7H). rhSYK activity=++.

1. extractionextracted with EtOAc (2×10 mL)
2. washThe combined organic layers were washed with brine
3. dry with materialdried (MgSO4)
4. filtrationfiltered
5. customevaporated