Reacción #1876814

Ecuación de reacción

sodium hydrogen sulfite

hydrogen peroxide water

Acetic acid

Compound ( d )

4-ethoxy-2-trifluoromethylphenylboric Acid

→

Compound ( e )

Rendimiento 97.7%

4-ethoxy-2-trifluoromethylphenol

Rendimiento 97.7%

Disolventes

THF

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe resulting reaction mixture
2. 2
   Temperaturawas carefully heated
3. 3
   workup.STIRRINGstirred at 50° C. for 4 hours
4. 4
   Extracciónthe reaction mixture was extracted three times with ether
5. 5
   Lavadowashed with aqueous saturated sodium hydrogen sulfite
6. 6
   Secadodried over anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONThe solvent was distilled off under reduced pressure

Procedimiento

Acetic acid (21.3 g) was added to a mixture of THF (200 mL) and Compound (d) (8.28 g) at room temperature, and the mixture was stirred at 0° C. under a nitrogen atmosphere. After adding 30% hydrogen peroxide water (40.1 g) dropwise, the resulting reaction mixture was carefully heated and stirred at 50° C. for 4 hours. Saturated aqueous sodium hydrogen sulfite (200 mL) was then slowly added dropwise at 0° C., and the reaction mixture was extracted three times with ether. The organic layers were combined, washed with aqueous saturated sodium hydrogen sulfite, and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to obtain 6.67 g of Compound (e).

Fuente