Br[CH2:2][C:3](=[O:12])[C:4]([CH3:11])([S:6][C:7]([F:10])([F:9])[F:8])[CH3:5].[NH:13]1[CH:17]=[N:16][CH:15]=[N:14]1.C(=O)([O-])[O-].[K+].[K+]>CC(C)=O>[CH3:5][C:4]([S:6][C:7]([F:10])([F:9])[F:8])([CH3:11])[C:3](=[O:12])[CH2:2][N:13]1[CH:17]=[N:16][CH:15]=[N:14]126.5 g (0.1 mol) of 1-bromo-3-methyl-3-trifluoromethylthio-butan-2-one were added dropwise to a mixture of 8.3 g (0.12 mol) of 1,2,4-triazole and 28 g (0.2 mol) of potassium carbonate in 150 ml of acetone at room temperature. The mixture was subsequently stirred under reflux for 1 hour, the inorganic salts were filtered off and the filtrate was concentrated. The residue was taken up in methylene chloride, washed with water, dried over sodium sulphate and distilled. 15.5 g (62% of theory) of 3-methyl-1-(1,2,4-triazol-1-yl)-3-trifluoromethylmercaptobutan-2-one of boiling point 91° C./0.5 mm Hg and of melting point ~45° C. were obtained.
Wird geladen…
