反应详情

To a solution of 10.8 g of poly(p-hydroxystyrene) obtained according to (2) in 72 ml of 1,4-dioxane were added 1.2 g of 2,3-dihydropyran and 0.05 g of pyridine salt of p-toluenesulfonic acid to carry out reaction at 25-30° C. for 15 hours. The reaction solution was poured into 1,000 ml of water and crystallized. Precipitated crystals were filtered out, washed with water and dried in vacuo to give 10.0 g of poly(p-hydroxystyrene/p-tetrahydropyranyloxystyrene) as white powdery crystal. P-hydroxystyrene unit/p-tetrahydropyranyloxystyrene unit molar ratio in the polymer≈95:5 (1H NMR). Mw≈13,000 (GPC with polystyrene calibration).

1. customreaction at 25-30° C. for 15 hours
2. customcrystallized
3. customPrecipitated crystals
4. filtrationwere filtered out
5. washwashed with water
6. customdried in vacuo