Reacción #518092

Ecuación de reacción

3,4-dihydro-2H-pyrane

pyridinium p-toluenesulfonate

water

→

p-hydroxystyrene p-tetrahydropyranyloxystyrene

Disolventes

1,4-dioxane

Condiciones de reacción

Tratamiento posterior

1. 1
   Otroa reaction at 25 to 30° C. for 15 hours
2. 2
   Otroto precipitate out
3. 3
   FiltraciónThe precipitated polymer was filtered
4. 4
   Lavadowashed with water
5. 5
   Otrodried under reduced pressure

Procedimiento

10.8 Grams of poly(p-hydroxystyrene) obtained in above (2) was dissolved in 72 ml of 1,4-dioxane, and 2.5 g of 3,4-dihydro-2H-pyrane and 0.05 g of pyridinium p-toluenesulfonate were added thereto, followed by conducting a reaction at 25 to 30° C. for 15 hours with stirring. The reaction solution is poured into 1000 ml of water to precipitate out. The precipitated polymer was filtered, washed with water and dried under reduced pressure to give 10.0 g of poly(p-hydroxystyrene/p-tetrahydropyranyloxystyrene) as white powders. A ratio of p-hydroxystyrene unit and p-tetrahydropyranyloxystyrene unit was about 90:10 by 1HNMR. Mw: about 15500, Mw/Mn: 1.18 (GPC method: polystyrene as standard).

Fuente