[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[CH:9]([CH2:16][CH2:17][CH3:18])[CH2:10][NH:11][NH:12][C:13](=O)C.C(OCC)C.[OH-].[Na+].[Cl-].[CH3:27][N:28](C)C=NC=[N+](C)C>C(O)C.Cl>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[CH:9]([CH2:16][CH2:17][CH3:18])[CH2:10][N:11]1[CH:27]=[N:28][CH:13]=[N:12]15.1 g (0.017 mol) of 1-[2-(2,4-dichlorophenyl)pentyl]-2acetylhydrazine in 10 ml of ethanol and 10 ml of concentrated hydrochloric acid are stirred at 50° C. overnight. The reaction mixture is then distributed between diethyl ether and 2 N sodium hydroxide solution; and the residue after concentration by evaporation is refluxed in 50 ml of absolute ethanol with 5.75 g (0.035 mol) of [3-(dimethylamino)-2-aza-prop-2-en-1-ylidene]-dimethylammonium chloride for 3.5 hours. The reaction solution is then concentrated by evaporation; 50 ml of formamide are added, and the mixture is heated at 170° C. for 1.5 hours. The reaction mixture, to which water has been added, is extracted with diethyl ether, and the residue obtained after concentration by evaporation is chromatographed to yield 4.2 g (84% of theory) of 1-[2-(2,4-dichlorophenyl)-pentyl]-1H-1,2,4-triazole.
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