Réaction #1745

Équation de réaction

4-phenylcyclohexanol

acetanhydride

→

O-acetyl-4-phenylcyclohexanol

Rendement 92.0%

Solvants

triethylamine

Conditions de réaction

Traitement

1. 1
   workup.ADDITIONare added
2. 2
   TempératureThis is heated to 80° C. for 3 hours
3. 3
   AutreThe crystalline product precipitated
4. 4
   Filtrationfiltered
5. 5
   workup.DISSOLUTIONdissolved in ether
6. 6
   Lavagewashed with sodium bicarbonate solution
7. 7
   Autredried
8. 8
   Autreevaporated down in vacuo

Mode opératoire

To a mixture of 20.3 g (0.115 mol) of 4-phenylcyclohexanol, 14.2 ml (0.15 mol) of acetanhydride and 29 ml of triethylamine are added, with stirring and at ambient temperature, 2.3 g (0.02 mol) of 4-dimethylaminopyridine, a clear solution being produced in an exothermic reaction. This is heated to 80° C. for 3 hours and the reaction mixture is then poured into ice water. The crystalline product precipitated is suction filtered, dissolved in ether, washed with sodium bicarbonate solution, dried and evaporated down in vacuo. 23 g (92% of theory) of O-acetyl-4-phenylcyclohexanol are obtained. The product is obtained initially as an oil but crystallises when left to stand.

Source