Production of substituted 4C 3-aminocrotonate compounds, useful for the production of dyestuffs, agrochemicals and pharmaceuticals, comprises reaction of acetoacetate compounds with ammonia or amine in the presence of an onium salt

摘要

A process for the production of a 4C 3-aminocrotonate compound (I) substituted by at least 2 chlorine and/or fluorine atoms comprises reaction of a 4C acetoacetate compound substituted by at least 2 chlorine and/or fluorine atoms with ammonia or a primary or secondary amine in the presence of an onium salt (II).