| 摘要 |
<p>The invention relates to a process (1) for the preparation of 4-cyanoacetylpyrazoles of the general formula [I] (wherein R1 is C¿1-6? alkyl; R?2¿ is C¿1-6? alkyl or C1-6 haloalkyl; and X is hydrogen or C1-6 alkyl) which comprises using a pyrazolecarboxylic acid halide and a cyanoacetate ester, a process (2) for the preparation of the same which comprises using a pyrazolecarboxylic acid and a cyanoacetate ester, a process (3) for the preparation which comprises using a pyrazolecarbonitrile, and a process (4) for the preparation which comprises using a haloacetylpyrazole. Further, the invention also provides an industrially advantageous process for preparing pyrazolecarboxylic acids useful as intermediates in the above processes.</p> |
