反应详情

温度

30 °C

To a suspension of 1,2-benzenedimethanol (5 g, 36.19 mmol) in toluene/2,3-dihydropyran (206 ml/11 ml) at 30° C. was added 3.62 g Dowex (50WX2-100). The reaction stirred at 30° C. for 5 hours. The mixture was filtered to remove Dowex, then concentrated in vacuo and put on vacuum pump overnight w/stirring to remove 2,3-dihydropyran. The crude reaction product was purified by normal phase chromatography (20% EtOAc/hexanes—25% -30%) to give a clear liquid (5.72 g).

1. filtrationThe mixture was filtered
2. customto remove Dowex
3. concentrationconcentrated in vacuo
4. customput on vacuum pump overnight
5. stirringw/stirring
6. customto remove 2,3-dihydropyran
7. customThe crude reaction product
8. customwas purified by normal phase chromatography (20% EtOAc/hexanes—25% -30%)