Реакция #2028907

Уравнение реакции

Toluene

3-(4′-ethoxy-2,2′,3,3′-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-one

toluene

diisobutylaluminum hydride

→

3-(4′-ethoxy-2,2′,3,3′-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-ol

Выход 99.0%

Растворители

formic acid

Условия реакции

Обработка

1. 1
   Другоеprepared in the ninth step
2. 2
   Другоеto give two layers
3. 3
   ЭкстракцияThe water layer was extracted with toluene (20 ml) twice
4. 4
   Промывкаthe combined organic layer was washed with water
5. 5
   Сушкаdried over anhydrous magnesium sulfate
6. 6
   workup.DISTILLATIONThe solvent was distilled off under reduced pressure

Методика

Toluene (20 ml) was added to 3-(4′-ethoxy-2,2′,3,3′-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-one (11) (2.35 g) prepared in the ninth step. A toluene solution of diisobutylaluminum hydride (0.99 M; 9.6 ml) was added dropwise at −50° C. or lower, and the stirring was continued for 3 hours. The reaction mixture was poured into a 10% aqueous solution of formic acid (50 ml) to give two layers. The water layer was extracted with toluene (20 ml) twice and the combined organic layer was washed with water, and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to leave 3-(4′-ethoxy-2,2′,3,3′-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-ol (12) (2.29 g) in 99% yield.

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