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    • 94. 发明专利
    • Production of 2,4-oxazolidinedione derivative
    • 2,4-二氧杂环己烷衍生物的制备
    • JPS59216882A
    • 1984-12-06
    • JP8979783
    • 1983-05-20
    • Kissei Pharmaceut Co Ltd
    • KOBAYASHI MICHIHIROKITAZAWA MAKIOSAITOU TAKENAO
    • C07D263/44C07D263/00C07D333/00C07D413/04C07D413/06
    • PURPOSE: To obtain the titled substance useful as a synthetic intermediate for medicines safely in constant yield, by reacting a 2-hydroxycarboxylic acid ester with an alkali cyanide in a polar organic solvent, and treating the reaction product if necessary with an acid.
      CONSTITUTION: A compound of formula I (R
      1 is H, lower alkyl, aryl, aralkyl or heterocyclic ring group; R
      2 is H or lower alkyl; R
      3 is lower alkyl) is reacted with an alkali cyanide in a polar organic solvent, e.g. 1-butanol, at 100W150°C for 10W30hr, and the reaction product is if necessary treated with an acid to give the aimed compound of formula II (M is alkali metal).
      EFFECT: The aimed substance in a large amount can be obtained in constant yield using the safe and stable alkali cyanide.
      COPYRIGHT: (C)1984,JPO&Japio
    • 目的:通过使2-羟基羧酸酯与碱金属氰化物在极性有机溶剂中反应,以稳定的产率获得用作药物的合成中间体的标题物质,并根据需要用酸处理反应产物。 构成:式Ⅰ化合物(R 1为H,低级烷基,芳基,芳烷基或杂环基; R 2为H或低级烷基; R 3为低级烷基)与碱金属氰化物在极性有机溶剂中反应。 1-丁醇,在100-150℃下反应10-30小时,如果需要用酸处理反应产物,得到目标化学式II(M是碱金属)。 效果:使用安全稳定的碱性氰化物可以以恒定的产率获得大量的目标物质。