反应详情

To a solution of Example 179C (0.12 g, 0.38 mmol) in acetonitrile (3.5 mL) was added iodotrimethylsilane (TMSI) (81 μL, 0.57 mmol). The reaction solution was stirred at room temperature for 3 h. After which, additional 1.5 equivalents of TMSI (81 μL) were added and stirring was continued for 2 h. The solution was quenched with water (3 mL) and extracted with ethyl acetate (2× 5 mL). The combined organic extracts were dried (Na2SO4) and concentrated in vacuo. Column chromatography on silica (70% ethyl acetate/hexane) afforded product as a white solid (91%). 1H NMR (300 MHz, CDCl3) δ ppm 0.55 (s, 1H), 0.77 (m, 12H), 0.93 (m, 2H), 1.36 (m, 3H), 1.79 (m, 8H), 2.19 (m, 3H), 3.77 (m, 2H), 4.42 (d, J=11.03 Hz, 1H), 4.57 (m, 3H), 6.15 (s, 1H), 7.46 (m, 4H), 7.59 (m, 1H), 7.69 (m, 1H), 8.12 (m, 2H); MS m/z 303.0.

1. stirringstirring
2. waitwas continued for 2 h
3. customThe solution was quenched with water (3 mL)
4. extractionextracted with ethyl acetate (2× 5 mL)
5. dry with materialThe combined organic extracts were dried (Na2SO4)
6. concentrationconcentrated in vacuo