反应详情

To a solution of 4′-acetoxy-3,5-bis(methoxymethoxy)stilbene (0.358 g, 1 mmol) in dry DCM (50 mL) and dry CH3CN (50 mL) were added NaI (1.8 g, 24 mmol) and freshly distilled TMSCl (1.52 g, 24 mmol). The mixture was stirred under argon for 15 minutes. The solution was diluted with DCM (50 mL) and washed with a fresh aqueous saturated solution of Na2S2O3 (3×40 mL) and saturated NaHCO3, and water. The organic layer was dried over Na2SO4, filtered and concentrated. The crude product was purified by flash column and gave 0.20 g product (72%). Data are: 1H NMR (Aceton-d6, 300 MHz) δ 8.25 (s, 1H), 7.60 (m, 2H), 7.13-7.08 (m, 4H), 6.59 (d, 2H), 6.32 (t, 1H), 2.25 (s, 3H); 13C NMR (Aceton-d6, 75 MHz) δ 169.7, 159.7, 151.4, 140.4, 136.0, 130.0, 128.3, 128.3, 123.0, 106.1, 103.3, 21.1; HRMS (EI+) found 270.0889 M+, calcd 270.0892 for C16H16O4.

1. washwashed with a fresh aqueous saturated solution of Na2S2O3 (3×40 mL) and saturated NaHCO3, and water
2. dry with materialThe organic layer was dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated
5. customThe crude product was purified by flash column