反应详情

Combine (2,4-difluoro-phenyl)-(3-methoxy-phenyl)-methanol (Compound 7) (89.2 g, 357 mmol), manganese oxide (96 g, 1.1 mol), and toluene (500 mL) and heat to reflux, under a nitrogen atmosphere for 2 hours. TLC (30% ethyl acetate in heptane) shows that the reaction is complete. Filter reaction mixture through celite® and concentrate. Purify by column chromatography using a graded solvent mixture of 10% dichloromethane in heptane to 50% dichloromethane in heptane to give an oil. Cool overnight to solidify, and triturate with pentane to give the title compound as a white solid (51.7 g, 58% Yield). NMR is consistent with the final, desired compound. mp=50° C.-52° C.

1. temperatureto reflux, under a nitrogen atmosphere for 2 hours
2. filtrationFilter
3. customreaction mixture through celite®
4. concentrationconcentrate
5. customPurify by column chromatography
6. additiona graded solvent mixture of 10% dichloromethane in heptane to 50% dichloromethane in heptane
7. customto give an oil
8. temperatureCool overnight
9. customtriturate with pentane