反应详情

温度

0 °C

To a solution of 2 g (10.6 mmoles) of 1-benzyl-piperidin-4-one in 14 ml of ethanol are added 6.8 ml (74.5 mmoles) of 2-hydroxy-2-methyl-propionitrile and 0.41 g (3 mmoles) of K2CO3 at 0° C. The mixture is stirred at 0° C. for 5 hours and diluted with diethyl ether. The organic layer is washed with water, dried over Na2SO4 and concentrated. Chromatography on silica gel (CH2Cl2:MeOH=9:1) gives 1.94 g of desired 1-benzyl-4-hydroxy-piperidine-4-carbonitrile in 85% yield.

1. washThe organic layer is washed with water
2. dry with materialdried over Na2SO4
3. concentrationconcentrated