[Cl:1][C:2]1[CH:11]=[C:10]([Cl:12])[C:9]([OH:13])=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6]([CH3:14])=[N:7]2.C(=O)([O-])[O-].[K+].[K+].[I-].[K+].Cl[CH2:24][C:25]#[N:26]>CC(=O)CC.O>[CH3:14][C:6]1[CH:5]=[CH:4][C:3]2[C:8](=[C:9]([O:13][CH2:24][C:25]#[N:26])[C:10]([Cl:12])=[CH:11][C:2]=2[Cl:1])[N:7]=110.7 g of 5,7-dichloro-8-hydroxyquinaldine are dissolved at elevated temperature in 150 ml of 2-butanone; 10.4 g of potassium carbonate are then added portionwise, and the mixture is refluxed for one hour. After the addition of 1 g of potassium iodide, there are added dropwise, with stirring and refluxing, 7.1 g of chloroacetonitrile in 30 ml of 2-butanone, and the mixture is subsequently heated for 3 hours at an internal temperature of 75° C. To the resulting reaction mixture, after cooling to room temperature, is added 1 liter of water, and the whole is filtered; the residue is washed with water, dried, and recrystallised from chloroform/petroleum ether (40°-60° C.) to thus obtain 2-methyl-5,7-dichloro-8-(cyanomethoxy)-quinoline, m.p. 157°-158° C.
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