反应详情

温度

0 °C

Magnesium turnings (28 g) are added to a solution of 3-(4-benzyloxyphenyl)-acrylonitrile (17.0 g, 72.3 mmol) in dry MeOH (800 mL). As soon as moderate H2 evolution is observed, the flask is immersed in an efficient ice/water cooling bath until the initially vigorous reaction subsides after about 45 minutes. Additional Mg (10 g) is added, and the reaction mixture is stirred for 4 hours with intermittent cooling during which time most of the Mg metal is consumed. The mixture is evaporated to a thick paste, which is then cooled to 0° C. and treated slowly with enough cold 6 N HCl to dissolve the magnesium salts. The turbid solution is extracted with CHCl3, and the organic layer is washed with 0.1 N NaOH and H2O, dried over Na2SO4, and evaporated to give white waxy solid residue that is recrystallized from EtOH/H2O (2:1) to give 3-(4-benzyloxyphenyl)-propionitrile.

1. customthe flask is immersed in an efficient ice/water cooling bath until the initially vigorous reaction subsides after about 45 minutes
2. customis consumed
3. customThe mixture is evaporated to a thick paste, which
4. additiontreated slowly with enough cold 6 N HCl
5. dissolutionto dissolve the magnesium salts
6. extractionThe turbid solution is extracted with CHCl3
7. washthe organic layer is washed with 0.1 N NaOH and H2O
8. dry with materialdried over Na2SO4
9. customevaporated
10. customto give white waxy solid residue that
11. customis recrystallized from EtOH/H2O (2:1)