reaction of pyrazole and 3,5-dimethylpyrazole with methyl vinyl ketone gave 4- ( 1h-pyrazol-1-yl ) -2-butanones which were converted to n-substituted 4- ( 1h-pyrazol-1-yl ) -2-butylamines by reductive amination using ammonium acetate , primary or secondary amines and sodium cyanoborohydride as reducing agent .
C0006505
butylamines
C0002508
amines