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    • 3. 发明专利
    • 4,7-dihydroisoxazolo(5,4-b)pyridine derivative and its preparation
    • 4,7-二氢异恶唑(5,4-B)吡啶衍生物及其制备
    • JPS59152386A
    • 1984-08-31
    • JP2598183
    • 1983-02-17
    • Shionogi & Co Ltd
    • ADACHI IKUOYAMAMORI TERUOUEDA MOTOHIKOTAINAI MASAMI
    • C07D498/04A61K31/535A61P3/00A61P3/14
    • NEW MATERIAL:The compound of formula I [R
      1 is straight chain, branched chain or cyclic alkyl, cyclic alkoxyalkyl, (substituted) phenyl, etc.; R
      2 is alkyl or (substituted) phenyl; R
      3 is alkyl, straight or branched chain alkoxy, or alkoxyalkoxy; R
      4 is methyl or phenyl].
      EXAMPLE: Methyl 3-( n-butyl )-6-methyl-4-(3-nitrophenyl)-4, 7-dihydroxazolo-[5.4-b] pyridine-5-carboxylate.
      USE: It has calcium antagonistic activity and is useful as a remedy for the diseases of circulatory system such as stenocardia, hypertension, arrhythmia, cerebral blood flow disorder, etc.
      PREPARATION: The compound of formula I can be prepared by reacting the compound of formula II with the compound of formula III. The reaction is carried out in a solvent or in the absence of solvent, if necessary in the presence of a catalyst (e.g. sulfuric acid) at room temperature or under heating (at 20W100°C).
      COPYRIGHT: (C)1984,JPO&Japio
    • 新物质:式I化合物[R 1]为直链,支链或环状烷基,环烷氧基烷基,(取代)苯基等; R 2是烷基或(取代的)苯基; R 3是烷基,直链或支链烷氧基或烷氧基烷氧基; R 4是甲基或苯基]。 实施例:3-(正丁基)-6-甲基-4-(3-硝基苯基)-4,7-二氢氮杂 - [5.4-b]吡啶-5-甲酸甲酯。 用途:具有钙拮抗作用,可用作心律失常,高血压,心律失常,脑血流紊乱等循环系统疾病的治疗剂。制剂:式Ⅰ化合物可以通过使式 II与式III化合物反应。 反应在溶剂中或在不存在溶剂的情况下进行,如果需要,在室温或加热(在20-100℃)下,在催化剂(如硫酸)存在下进行。