申请人:Lonza Group
公开号:US06248900B1
公开(公告)日:2001-06-19
A process for preparing alkoxytriazolinones of general formula (1):
in which R1 and R2 independently represent an alkyl group, an aryl group, an arylalkyl group or cycloalkyl group. The alkoxytriazolinones are prepared by reacting, in a first stage, water-dissolved iminocarboxylic acid diesters in the presence of a mineral acid or by reacting a mixture of water with a water-miscible polar organic solvent and a carboxylic acid ester, yielding hydrazine carboxylic acid ester; and in a second stage, by further reacting the thus obtained reaction product with an amine, a polar organic solvent or mixtures thereof in the presence of water.
一种制备通式(1)的烷氧基三唑酮的方法:其中R1和R2分别代表烷基、芳基、芳基烷基或环烷基。该烷氧基三唑酮的制备方法包括以下步骤:第一阶段,在矿酸存在下反应水溶性亚氨基羧酸二酯,或在水和可溶于水的极性有机溶剂的混合物中反应羧酸酯,得到肼羧酸酯;第二阶段,在水的存在下,将所得反应产物与胺、极性有机溶剂或其混合物进一步反应。