Reaktion #75055

Reaktionsgleichung

4-hydroxydiphenyl ether

1,2-epoxycyclopentane

potassium hydroxide

→

2-(4-phenoxyphenoxy)-cyclopentan-1-ol

Lösungsmittel

ether hexane

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter cooling
2. 2
   Waschenthe organic solution is washed 4 times with 10% potassium hydroxide solution and 3 times with saturated sodium chloride solution
3. 3
   TrocknenThe organic phase is dried over sodium sulphate
4. 4
   Einengenconcentrated by rotary evaporation under reduced pressure
5. 5
   workup.DISTILLATIONDistillation of the crude product

Vorschrift

A mixture of 52 g of 4-hydroxydiphenyl ether and 23.5 g of 1,2-epoxycyclopentane is heated to 150° C. To this melt are added in the course of 25 minutes 6.7 g of 90% potassium hydroxide powder and the mixture is stirred for one hour at 130° C. After cooling, the reaction mixture is taken up in ether/hexane (1:1) and the organic solution is washed 4 times with 10% potassium hydroxide solution and 3 times with saturated sodium chloride solution. The organic phase is dried over sodium sulphate and concentrated by rotary evaporation under reduced pressure. Distillation of the crude product yields 2-(4-phenoxyphenoxy)-cyclopentan-1-ol as a colourless oil with a boiling point of 181°-185° C./0.001 torr and a refractive index of nD20 =1.5812.

Quelle