反应详情

A mixture of 4-hydroxy-3-methoxy-benzyl alcohol (14.7 g) and sodium cyanide (5 g) in dimethylformamide (200 ml) is stirred under an atmosphere of nitrogen for 3 hours at +120° C. The mixture is then cooled to +100° C. and 1-(2-bromo-ethoxy)-4-fluoro-benzene (25 g) is added in one portion. The mixture is stirred at +100° C. for another 4 hours. Upon cooling water (800 ml) is added. The mixture is extracted with ethyl acetate (2×500 ml). The organic phases are washed with brine (2×500 ml), dried (MgSO4) and evaporated. The residue is recrystallised from ethyl acetate/hexane. {4-[2-(4-Fluoro-phenoxy)-ethoxy]-3-methoxy-phenyl}-acetonitrile is obtained, m.p. 126-128° C.

1. temperatureThe mixture is then cooled to +100° C.
2. stirringThe mixture is stirred at +100° C. for another 4 hours
3. additionis added
4. extractionThe mixture is extracted with ethyl acetate (2×500 ml)
5. washThe organic phases are washed with brine (2×500 ml)
6. dry with materialdried (MgSO4)
7. customevaporated
8. customThe residue is recrystallised from ethyl acetate/hexane