Br[CH2:2][C:3]1[CH:10]=[CH:9][C:6]([C:7]#[N:8])=[CH:5][CH:4]=1.[NH:11]1[CH:15]=[N:14][CH:13]=[N:12]1>C(Cl)(Cl)Cl.C(#N)C>[NH:11]1[CH:15]=[N:14][C:13]([CH2:2][C:3]2[CH:10]=[CH:9][C:6]([C:7]#[N:8])=[CH:5][CH:4]=2)=[N:12]1.[N:11]1[N:12]=[CH:13][N:14]([CH2:2][C:3]2[CH:10]=[CH:9][C:6]([C:7]#[N:8])=[CH:5][CH:4]=2)[CH:15]=1In the process described in '672, the reaction of refluxing 4-bromomethyl benzonitrile with 1,2,4-triazole in the presence of potassium carbonate and potassium iodide in acetone solvent (according to example 24) gives 4-[1-(1,2,4-triazolyl)methyl]benzonitrile of the formula II in an amount of 87 wt %, and 4-[4-(1,2,4-triazol-4-yl)methyl]benzonitrile of the formula III in an amount of 11 wt %, along with 2% of other impurities. The reaction of 4-bromomethyl benzonitrile with 1,2,4-triazole in a mixture of chloroform and acetonitrile (example 9) gives 4-[1-(1,2,4-triazolyl)methyl]benzonitrile of the formula II in an amount of 30 wt %, and 4-[(1,2,4-triazol-4-yl)methyl]benzonitrile of the formula III in an amount of 40 wt %, along with 20 wt % other impurities. The ratios of intended product to impurity for the prior art processes have been determined by experiment.
불러오는 중…
