Реакция #75058

Уравнение реакции

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

water

sodium borohydride

→

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

Растворители

tetrahydrofurane

tetrahydrofurane

sodium hydroxide

sodium hydroxide

Условия реакции

Обработка

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

Методика

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.

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