反应详情

Under cooling with an ice bath, 53.1 g of aqueous hydrogen peroxide was slowly added dropwise to the compound (3) having been dissolved in 300 mL, followed by stirring at room temperature for 3 hours. Under cooling with an ice bath, 100 mL of a saturated sodium hydrogen sulfite aqueous solution was added dropwise thereto to terminate the reaction. The aqueous layer was extracted with diethyl ether, which was added to the organic layer, and the organic layer was washed with a saturated sodium hydrogen sulfite aqueous solution and a saturated saline and then dried over anhydrous magnesium sulfate. The solvent was distilled off in vacuo to obtain 22.7 g of 2,3-difluoro-5-methylphenol (4).

1. temperatureUnder cooling with an ice bath
2. dissolutionhaving been dissolved in 300 mL
3. temperatureUnder cooling with an ice bath
4. customto terminate
5. customthe reaction
6. extractionThe aqueous layer was extracted with diethyl ether, which
7. additionwas added to the organic layer
8. washthe organic layer was washed with a saturated sodium hydrogen sulfite aqueous solution
9. dry with materiala saturated saline and then dried over anhydrous magnesium sulfate
10. distillationThe solvent was distilled off in vacuo