反应详情

温度

0 °C

4-Bromophenol (1.37 g, 7.90 mmol) was added to a solution of (6-methoxypyridin-3-yl)methanol (1.0 g, 7.16 mmol) in THF (100 mL). Triphenylphosphine (1.88 g, 7.19 mmol) was added followed by triethylamine (0.727 g, 7.19 mmol). The resulting solution was cooled to 0° C. and DIAD (1.45 g, 7.19 mmol) was added by drop-wise addition and was maintained at 0° C. for 30 minutes, then warmed to room temperature and stirred for two days. The reaction was quenched by addition of water and extracted with ether (2×100 mL). The organic layer was washed with water (2×100 mL) then brine (1×100 mL), dried (MgSO4), filtered and concentrated to give a yellow oil. The crude material was purified by flash column chromatography on a Biotage SNAP cartridge Kp-sil 100g column (hexanes/ethyl acetate 9:1) to give a white solid. Mass/Yield—1.78 g/84% TLC (hexanes/ethyl acetate=8:2) Rf=0.12, UV active. LCMS MS ES+294.4/296.4. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 3.93 (s, 3 H) 4.93 (s, 2 H) 6.72-6.78 (m, 1 H) 6.81-6.86 (m, 2 H) 7.33-7.42 (m, 2 H) 7.58-7.65 (m, 1 H) 8.18 (s, 1 H).

1. temperaturewas maintained at 0° C. for 30 minutes
2. temperaturewarmed to room temperature
3. customThe reaction was quenched by addition of water
4. extractionextracted with ether (2×100 mL)
5. washThe organic layer was washed with water (2×100 mL)
6. dry with materialbrine (1×100 mL), dried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated
9. customto give a yellow oil
10. customThe crude material was purified by flash column chromatography on a Biotage SNAP cartridge Kp-sil 100g column (hexanes/ethyl acetate 9:1)
11. customto give a white solid