申请人:BAYER AKTIENGESELLSCHAFT
公开号:US11220487B2
公开(公告)日:2022-01-11
The present invention relates to a novel process for preparing and isolating 3,4-dichloro-N-(2-cyanophenyl)-5-isothiazolecarboxamide (Isotianil), which can be used as an active compound with microbicidal properties, wherein the amount of waste materials—e.g. solvents and diluents—is significantly reduced and the process meets the requirements of industrial scale production, in particular that it provides the product in high yield, high purity, i.e. minimum amount of by-products and impurities, and can be carried out with tolerable corrosivity in industrial scale metal, in particular stainless steel, vessels or Cr—Ni—Mo alloy pressure filters or centrifuges.
本发明涉及一种制备和分离 3,4-二氯-N-(2-氰基苯基)-5-异噻唑甲酰胺 (Isotianil)的新工艺,该工艺可用作具有杀微生物特性的活性化合物。溶剂和稀释剂等废料的用量大大减少,而且该工艺符合工业规模生产的要求,特别是能提供高产率、高纯度的产品,即副产品和杂质的用量最少,并能在工业规模的金属,特别是不锈钢容器或铬镍钼合金压力过滤器或离心机中以可承受的腐蚀性进行生产。