The invention concerns a process for the manufacture of pyrazole-4-carboxamides, in particular, of 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxamides which are useful as pharmaceuticals and agrochemicals. The carboxamides are prepared from the corresponding pyrazole-4-carboxylic acid esters and appropriate amine in the presence of a base. The reaction is performed in a reaction medium which is essentially free of water; alternatively, the base is used in an amount equal to or greater than 0.25 equivalents per mole of amine.
该发明涉及一种用于制备
吡唑-4-羧酰胺的方法,特别是
3-二氟甲基-1-甲基-1H-吡唑-4-羧酰胺,它们可用作药物和农药。这些羧酰胺是通过相应的
吡唑-4-羧酸酯和适当的胺在碱的存在下制备的。反应在基本不含
水的反应介质中进行;或者,碱的用量等于或大于每摩尔胺的0.25当量。