[EN] PROCESS FOR THE PREPARATION OF PYRAZOLE-4-CARBOXAMIDES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE PYRAZOLE-4-CARBOXAMIDES
申请人:SOLVAY
公开号:WO2012055864A1
公开(公告)日:2012-05-03
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。