Réaction #2348092

Équation de réaction

water

p-toluenesulfonic acid monohydrate

compound ( 7 )

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

water

→

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

Solvants

toluene

Conditions de réaction

Traitement

1. 1
   Températurethe mixture was heated
2. 2
   AutreAfter terminating
3. 3
   Autrethe reaction
4. 4
   Extractionthe aqueous layer was extracted with toluene
5. 5
   Lavagewashed with saturated saline
6. 6
   Séchagedried over anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONThe solvent was distilled off under reduced pressure
8. 8
   Autrethe resulting residue was purified by silica gel column chromatography
9. 9
   Autresubjected to recrystallization

Mode opératoire

0.55 g of p-toluenesulfonic acid monohydrate was added to the compound (7) 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 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 6.53 g of 1-(2,3-difluoro-4-ethoxy-6-methylphenyl)-2-(4-pentylcyclohexyl)ethene (Compound 1-1-3-18) as colorless crystals.

Source