Reacción #11745

Ecuación de reacción

4-chloro-2-chloromethyl-1-methoxy-benzene

potassium cyanide

18-crown-6

→

title compound

Rendimiento 98.2%

(5-Chloro-2-methoxy-phenyl)-acetonitrile

Rendimiento 98.2%

Disolventes

acetonitrile

ethyl acetate

Condiciones de reacción

Tratamiento posterior

1. 1
   Lavadowashed with aqueous sodium hydrogen carbonate
2. 2
   SecadoThe organic layer was dried over magnesium sulfate
3. 3
   Concentraciónconcentrated in vacuo
4. 4
   OtroThe crude product was purified
5. 5
   Lavadoeluting with methylene chloride

Procedimiento

To a solution of (5-chloro-2-methoxy-phenyl)-methanol (17.1 g, 99.1 mmol) in methylene chloride (100 mL) was added thionyl chloride (14.5 mL, 198 mmol). The reaction was stirred at reflux for 3 hours, cooled to room temperature and concentrated in vacuo. The crude product was dissolved in methylene chloride and washed with saturated aqueous sodium hydrogen carbonate then dried over magnesium sulfate. Concentration in vacuo gave 4-chloro-2-chloromethyl-1-methoxy-benzene (18.4 g). To a solution of 4-chloro-2-chloromethyl-1-methoxy-benzene (18.4 g, 96.4 mmol) in acetonitrile (100 mL) was added potassium cyanide (12.5 g, 193 mmol) and 18-crown-6 (2.54 g, 9.64 mmol). The reaction was stirred 12 hours at ambient temperature, diluted with ethyl acetate and washed with aqueous sodium hydrogen carbonate. The organic layer was dried over magnesium sulfate and concentrated in vacuo. The crude product was purified by passing it through a pad of silica gel, eluting with methylene chloride to give the title compound (17.2 g).

Fuente