Reaction #1745

Reaction equation

4-phenylcyclohexanol

acetanhydride

→

O-acetyl-4-phenylcyclohexanol

Yield 92.0%

Solvents

triethylamine

Conditions

Workup

1. 1
   workup.ADDITIONare added
2. 2
   TemperatureThis is heated to 80° C. for 3 hours
3. 3
   OtherThe crystalline product precipitated
4. 4
   Filtrationfiltered
5. 5
   workup.DISSOLUTIONdissolved in ether
6. 6
   Washwashed with sodium bicarbonate solution
7. 7
   Otherdried
8. 8
   Otherevaporated down in vacuo

Procedure

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