反应详情

温度

-15 °C

An amount of 4,4'-biphenol (200 g, 1.07 moles), (Aldrich Chemical Company, Milwaukee, Wis.), and 1000 ml of acetic anhydride were added to a 2-liter boiling flask equipped with a cold water condenser and a polytetrafluoroethylene-coated magnetic stirring bar. The mixture was heated to reflux under nitrogen and all of the solid dissolved. The solution was refluxed for 20 hours, then cooled in a freezer at -15° C. overnight. The white crystals that were formed were isolated by filtration, washed with cold acetic anhydride and dried in a 100° C. vacuum oven overnight yielding 268.4 g of 4,4'-diacetoxybiphenyl with a m.p. of 162.7° C. to 164.0° C.

1. customequipped with a cold water condenser and a polytetrafluoroethylene-coated magnetic stirring bar
2. temperatureThe mixture was heated
3. temperatureto reflux under nitrogen
4. dissolutionall of the solid dissolved
5. temperatureThe solution was refluxed for 20 hours
6. customThe white crystals that were formed
7. customwere isolated by filtration
8. washwashed with cold acetic anhydride
9. customdried in a 100° C. vacuum oven overnight