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    • 5. 发明授权
    • Regiospecific synthesis of phosphonous acids
    • 膦酸的区域特异性合成
    • US06717007B1
    • 2004-04-06
    • US10088381
    • 2002-08-05
    • Sushil Kumar DubeyVenkat RajgopalAnil Vir SinghSaswata LahiriMukesh Jagannath Wani
    • Sushil Kumar DubeyVenkat RajgopalAnil Vir SinghSaswata LahiriMukesh Jagannath Wani
    • C07F928
    • C07F9/48
    • An improved regiospecific synthesis of organic phosphonous acids, comprising of hydrophosphorylation of an olefin with hydrophosphorous acid in the presence of an inorganic persulfate, which acts as a source of free radicals at a pH ranging from 4.5 to 7.0, in which the orientation of addition is anti-Markonikoff. The process enables production of organic phosphonous acids at lower temperature and atmospheric pressure under milder pH conditions for better regioselectivity in hydrophosphorylation and obtain the phosphonous acid with good yield and purity following simple isolation procedure. Phosphonous acids obtained by the process are commercially valuable as effective detergents and wetting agents, lubricants and lubricant additives, plasticizers for plastics and resins, corrosion inhibitors, chemicals including insecticides and pesticides, cobalt extractants and as key intermediates for preparation of commercially important angiotensin converting enzyme (ACE) inhibitors.
    • 改进的有机膦酸的区域特异性合成,其包括在无机过硫酸盐存在下与氢亚磷酸的烯烃的磷酸化作用,其在4.5至7.0的pH范围内作为自由基的来源,其中添加取向为 反Markonikoff。 该方法能够在较低温度和大气压下在较温和的pH条件下生产有机膦酸,以在氢磷酸化中获得更好的区域选择性,并通过简单的分离程序获得良好的产率和纯度的膦酸。 通过该方法获得的亚磷酸作为有效的洗涤剂和润湿剂,润滑剂和润滑剂添加剂,用于塑料和树脂的增塑剂,腐蚀抑制剂,包括杀虫剂和农药的化学品,钴提取剂和作为制备商业上重要的血管紧张素转化酶的关键中间体是有商业价值的 (ACE)抑制剂。