反应详情

To a solution of the intermediate from Step G (3.64 g, 12.19 mmol) in anhydrous DCM (50 mL) was added NIS (5.48 g, 24.4 mmol). The reaction mixture was stirred at room temperature for 18 hours and concentrated. The residue was suspended in ethyl acetate and washed with saturated sodium thiosulfate (2×). The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified by silica gel chromatography using a hexanes/EtOAc gradient to give a bright white solid. m/z=424.7 (M+H).

1. concentrationconcentrated
2. washwashed with saturated sodium thiosulfate (2×)
3. washThe organic layer was washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by silica gel chromatography
8. customto give a bright white solid