反应详情

A mixture of 7.7 g (0.040 mol) of 2,5-dichloronitrobenzene and 4.0 g (0.044 mol) of copper (I) cyanide in 4.0 ml (0.05 mol) of N,N-dimethylformamide was refluxed for 3.5 hours. The reaction mixture was poured slowly into 39 ml (0.40 mol) of ethyl acetate and followed by stirring for 10 hours at room temperature. The precipitate was filtered and washed with 3 ml of ethyl acetate. After concentration of the combined filtrate, the residue gave 4.6 g (63.0%) of 4-chloro-2-nitrobenzonitrile purified by the procedure of Example 1.

1. temperaturewas refluxed for 3.5 hours
2. filtrationThe precipitate was filtered
3. washwashed with 3 ml of ethyl acetate