Reacción #75058

Ecuación de reacción

3-(4-phenoxyphenoxy)-cyclopenten-1-ene

water

sodium borohydride

→

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

Disolventes

tetrahydrofurane

tetrahydrofurane

sodium hydroxide

sodium hydroxide

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.STIRRINGThe reaction mixture is stirred for 2 hours at room temperature
2. 2
   Otroprecipitated mercury
3. 3
   Otrois removed by filtration
4. 4
   workup.ADDITIONThe filtrate is poured into ice-water
5. 5
   Extracciónafter extraction with ether
6. 6
   Lavadothe organic phase is washed with saturated sodium chloride solution
7. 7
   Secadodried over sodium sulphate
8. 8
   Concentraciónconcentrated by rotary evaporation
9. 9
   workup.DISTILLATIONFractional distillation of the residue

Procedimiento

A solution of 12.6 g of 3-(4-phenoxyphenoxy)-cyclopenten-1-ene in 25 ml of tetrahydrofurane is added dropwise in the course of 1 hour to a mixture of 15.9 g of mercury(II) acetate, 35 ml of water and 50 ml of tetrahydrofurane. The mixture is stirred for about 15 hours at room temperature, then 50 ml of 3 N sodium hydroxide solution are added dropwise in the course of 11/2 hours, followed by the dropwise addition in the course of 1 hour of 50 ml of a 0.5 N solution of sodium borohydride in 3 N sodium hydroxide solution. The reaction mixture is stirred for 2 hours at room temperature and precipitated mercury is removed by filtration. The filtrate is poured into ice-water and, after extraction with ether, the organic phase is washed with saturated sodium chloride solution, dried over sodium sulphate and concentrated by rotary evaporation. Fractional distillation of the residue yields 2-(4-phenoxyphenoxy)cyclopentan-1-ol as a colourless oil with a boiling point of 181°-185° C./0.001 torr.

Fuente