Reacción #71534

Ecuación de reacción

(R)-2-chloromandelic acid

sulfuric acid

methanol

→

Methyl-(R)-2-hydroxy-2-(2-chlorophenyl)acetate

Rendimiento 94.0%

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaheated
2. 2
   Temperaturato reflux, till completion of reaction
3. 3
   workup.DISTILLATIONThen excess of methanol was distilled off under reduced pressure
4. 4
   Lavadowashed with aqueous sodium bicarbonate solution
5. 5
   workup.DISTILLATIONDichloromethane was distilled under reduced pressure

Procedimiento

In a four necked round bottomed flask, 500 gm of (R)-2-chloromandelic acid was taken in 2600 ml methanol. Then 18.8 gm of sulfuric acid was added and heated to reflux, till completion of reaction. Then excess of methanol was distilled off under reduced pressure. Residue was taken in dichloromethane and washed with aqueous sodium bicarbonate solution. Dichloromethane was distilled under reduced pressure to obtain 522 gm of Methyl-(R)-2-hydroxy-2-(2-chlorophenyl)acetate as an oil. Yield: 94%. Purity: 98.5%

Fuente