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    • 10. 发明授权
    • 3-hydroxy-2(1H)-pyridinone chelating agents
    • 3-羟基-2(1H) - 吡啶酮螯合剂
    • US5624901A
    • 1997-04-29
    • US285640
    • 1994-08-02
    • Kenneth N. RaymondJide Xu
    • Kenneth N. RaymondJide Xu
    • C07D213/81C07D405/12A61K38/06A61K31/44A61K38/08C07D401/12
    • C07D405/12C07D213/81
    • Disclosed is a series of improved metal chelating agents, which are highly effective upon both injection and oral administration; several of the most effective are of low toxicity. These chelating agents incorporate within their structure 1-hydroxy-2-pyridinone (1,2-HOPO) and 3-hydroxy-2-pyridinone (3,2-HOPO) moieties with a substituted carbamoyl group ortho to the hydroxy or oxo groups of the hydroxypyridinone ring. The electron-withdrawing carbamoyl group increases the acidity of the hydroxypyridinones. In the metal complexes of said chelating agents, the amide protons form very strong hydrogen bonds with its adjacent HOPO oxygen donor, making these complexes very stable at physiological conditions. The terminal N-substituents provides a certain degree of lipophilicity to said 3,2-HOPO, increasing oral activity. Also disclosed is a method of making the chelating agents and a method of producing a known compound, 3-hydroxy-1-alkyl-2(1H)pyridinone, used as a precursor to the chelating agent, safely and in large quantities.
    • 公开了一系列改进的金属螯合剂,其在注射和口服给药方面都是非常有效的; 几种最有效的是低毒性的。 这些螯合剂在它们的结构内引入1-羟基-2-吡啶酮(1,2-HOPO)和3-羟基-2-吡啶酮(3,2-HOPO)部分,与羟基或氧代基邻位的取代的氨基甲酰基 羟基吡啶酮环。 吸电子氨基甲酰基增加羟基吡啶酮的酸度。 在所述螯合剂的金属络合物中,酰胺质子与其相邻的HOPO氧供体形成非常强的氢键,使得这些复合物在生理条件下非常稳定。 末端N-取代基对所述3,2-HOPO提供一定程度的亲油性,增加口服活性。 还公开了以安全且大量的方式制备螯合剂的方法和用作螯合剂前体的已知化合物3-羟基-1-烷基-2(1H)吡啶酮的方法。