Reaktion #2348090

Reaktionsgleichung

water

p-toluenesulfonic acid monohydrate

compound ( 6 )

1-(2,3-difluoro-4-ethoxy-6-methylphenyl)-2-(4-propylcyclohexyl)ethanol

water

→

1-(2,3-difluoro-4-ethoxy-6-methylphenyl)-2-(4-propylcyclohexyl)ethene

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthe mixture was heated
2. 2
   SonstigeAfter terminating
3. 3
   Sonstigethe reaction
4. 4
   Extraktionthe aqueous layer was extracted with toluene
5. 5
   Waschenwashed with a saturated saline
6. 6
   Trocknendried over anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONThe solvent was distilled off under reduced pressure
8. 8
   Sonstigethe resulting residue was purified by silica gel column chromatography
9. 9
   Sonstigesubjected to recrystallization

Vorschrift

0.55 g of p-toluenesulfonic acid monohydrate was added to the compound (6) having been dissolved in 120 mL of toluene, and the mixture was heated under stirring by using a Dean-Stork trap until completion of azeotrope of water. After terminating the reaction by adding water, the aqueous layer was extracted with toluene, washed with a saturated saline, and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography and then subjected to recrystallization to obtain 2.01 g of 1-(2,3-difluoro-4-ethoxy-6-methylphenyl)-2-(4-propylcyclohexyl)ethene (Compound 1-1-3-17) as colorless crystals.

Quelle