反应详情

56.6 g of tetrabromobisphenol A are dissolved in 50 ml of THF. After addition of 17.5 g of dihydropyran and 0.25 g of Amberlyst, the mixture is refluxed for 3 hours, cooled, neutralized by addition of 5 g of potassium carbonate, stirred for a further hour, filtered and evaporated to dryness: oil. NMR: 7.27 ppm (arom.), 6.0 ppm (t, acetal), 1.57 ppm (methyl).

1. temperaturethe mixture is refluxed for 3 hours
2. temperaturecooled
3. filtrationfiltered
4. customevaporated to dryness