[Cl:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1.[CH2:10]([O:12]CC)[CH3:11].Cl>C(O)C>[ClH:1].[CH2:10]([O:12][C:6](=[NH:7])[C:5]1[CH:8]=[CH:9][C:2]([Cl:1])=[CH:3][CH:4]=1)[CH3:11]10 g of 4-chlorobenzonitrile was suspended in 12 ml of ethanol and dissolved by adding diethyl ether. While being cooled in an ice bath, it was saturated with HCl gas. After 72 hours, precipitated product was suctioned out. The product was washed with diethyl ether.
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