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    • 18. 发明授权
    • Benzocycloalkenecarboxylic acid and process for its preparation
    • 苯并二恶唑酸及其制备方法
    • US5177257A
    • 1993-01-05
    • US776385
    • 1991-11-20
    • Andreas von SprecherHansjurg Wetter
    • Andreas von SprecherHansjurg Wetter
    • A61K31/19A61P29/00A61P43/00C07B57/00C07C51/487C07C62/38
    • C07C62/38C07C51/487
    • The novel (S)-4-(2-bromobenzoyl)-5-hydroxy-benzocyclobutene-1-carboxylic i.e. the compound of the formula ##STR1## in free form or in salt form, can be used as active ingredient in pharmaceutical preparations and can be prepared by a novel process, which is characterized in that racemic 4-(2-bromobenzoyl)-5-hydroxy-benzocyclobutene-1-carboxylic acid is reacted at elevated temperature with at least the equimolar amount of quinine in an alcoholic solvent for from approximately 6 to approximately 48 hours, the quinine salt of the (S)-4-(2-bromobenzoyl)-5-hydroxy-benzocyclobutene-1-carboxylic acid, precipitated in crystalline form as the direct reaction product, is separated from the reaction mixture, and the (S)-4-(2-bromobenzoyl)-5-hydroxy-benzocyclobutene-1-carboxylic acid is set free from this salt by acid treatment in a customary manner, and, if desired, this free acid is converted into a salt.
    • PCT No.PCT / CH91 / 00064 Sec。 371日期1991年11月20日 102(e)1991年11月20日日期PCT 1991年3月19日PCT公布。 WO91 / 14671 PCT出版物 日期为1991年10月3日。新型(S)-4-(2-溴苯甲酰基)-5-羟基 - 苯并环丁烯-1-羧酸,即游离形式或盐形式的式(I)化合物, 可以用作药物制剂中的活性成分,并且可以通过一种新的方法制备,其特征在于外消旋的4-(2-溴苯甲酰基)-5-羟基 - 苯并环丁烯-1-羧酸在升高的温度下至少与 在酒精溶剂中等摩尔量的奎宁约6至约48小时,(S)-4-(2-溴苯甲酰基)-5-羟基 - 苯并环丁烯-1-羧酸的奎宁盐以晶体形式沉淀 作为直接反应产物,与反应混合物分离,并以常规方式通过酸处理使(S)-4-(2-溴苯甲酰基)-5-羟基 - 苯并环丁烯-1-羧酸不含该盐 ,如果需要,将该游离酸转化成盐。