[SH:1][C:2]1[O:3][C:4]([C:7]2[O:11][C:10]([CH3:12])=[N:9][N:8]=2)=[N:5][N:6]=1.O1CCOCC1.Br[CH2:20][CH2:21][C:22]([F:26])=[C:23]([F:25])[F:24]>CN(C)C=O>[F:26][C:22](=[C:23]([F:25])[F:24])[CH2:21][CH2:20][S:1][C:2]1[O:3][C:4]([C:7]2[O:11][C:10]([CH3:12])=[N:9][N:8]=2)=[N:5][N:6]=13.7 g of 2-mercapto-5-(2-methyl-1,3,4-oxadiazol-5-yl)-1,3,4-oxadiazole according to Example H1 are initially introduced into a mixture of 36 ml of dioxane and 4 ml of dimethylformamide, and 2.24 g of potassium t-butylate are added, while stirring. 4.2 g of 4-bromo-1,1,2-trifluorobut-1-ene are added dropwise and the mixture is stirred overnight at room temperature. After the salts have been filtered off, the solvents are distilled off in vacuo, the residue is taken up in methylene chloride, the solution is washed with water and 1-normal sodium hydroxide solution in succession and the solvent is evaporated off in vacuo. 3.2 g of the desired compound of melting point 77°-79° C. are obtained as the residue.
Wird geladen…
