反应详情

温度

90 °C

To a solution of 92 g (725 mmol) of oxalyl chloride in 188 ml of 1,2-dichlorobenzene are added 26.5 g (145 mmol) of N-benzylaminoacetonitrile. The solution is heated to 60° C. for 20 min and to 90° C. for 6 h. It is allowed to cool and left at this temperature for 15 h. The solvent is removed under reduced pressure and the residue is eluted with silica gel and with a gradient from cyclohexane to 5:1 cyclohexane/ethyl acetate. The product fractions are combined and concentrated to dryness under reduced pressure. The residue is crystallized from diethyl ether. This affords 22 g (60% of theory) of the desired compound.

1. temperatureto cool
2. customThe solvent is removed under reduced pressure
3. washthe residue is eluted with silica gel and with a gradient from cyclohexane to 5:1 cyclohexane/ethyl acetate
4. concentrationconcentrated to dryness under reduced pressure
5. customThe residue is crystallized from diethyl ether