反应详情

A solution of 8a (0.06 g, 0.14 mmol), trimethylsilyl chloride (0.01 mL, 0.08 mmol) and phenylisocyanate (0.1 mL, 0.92 mmol) in CH2Cl2 was stirred at room temperature for 5 days. The reaction mixture was then washed with saturated NaHCO3 (10 mL) and H2O (10 mL) and dried (Na2SO4). The solvent was removed under reduced pressure to give a crude oil. The oil was purified by column chromatography (eluent: ethyl acetate/n-hexanes) to afford 22 (0.01 g, 14%) as a clear oil: 1H NMR (CDCl3): δ 1.15 (s, 3H); 1.48 (s, 3H); 1.52-1.72 (m, 3H); 1.82 (dd, 1H, 2.7, 10.2 1H); 2.03-2.20 (m, 1H); 2.22 (s, 1H); 2.24-2.48 (m, 2H); 2.54 (dd, Ja=5.1, Jb=13.5, 1H); 2.80 (dd, Ja=3.6, Jb=13.2, 1H); 3.75 (s, 3H); 5.21 (dd, Ja=7.8, Jb=12.3, 1H); 5.54 (dd, J=11.7, 1H); 6.40 (m, 1H), 6.69 (br s, 1H); 6.87 (br s, 1H); 7.12 (m, 2H); 7.28-7.45 (m, 5H).

1. washThe reaction mixture was then washed with saturated NaHCO3 (10 mL) and H2O (10 mL)
2. dry with materialdried (Na2SO4)
3. customThe solvent was removed under reduced pressure
4. customto give a crude oil
5. customThe oil was purified by column chromatography (eluent: ethyl acetate/n-hexanes)