会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Continuous process for preparing optically pure (s)-3,4-dihydroxybutyric acid derivatives
    • 用于制备光学纯的(S)-3,4-二羟基丁酸衍生物的连续方法
    • US06288272B1
    • 2001-09-11
    • US09359676
    • 1999-07-23
    • Kyoung Rok RohJongpil ChunYik-haeng ChoYoung Mi ParkHosung YuDae Il Hwang
    • Kyoung Rok RohJongpil ChunYik-haeng ChoYoung Mi ParkHosung YuDae Il Hwang
    • C07C6966
    • C07D307/33C07B2200/07C12P7/42C12P17/04C12P19/14C12P19/22
    • The present invention relates to a continuous process for preparing optically pure (S)-3,4-dihydroxybutyric acid derivatives expressed by the following Formula 1 and more particularly, to the continuous process which enables preparing optically pure (S)-3,4-dihydroxybutyric acid derivatives economically in large quantities, by: (a) Preparing &agr;-(1,4) linked oligosaccharide having adequate sugar distribution by reacting amylopectin which is easily available from natural product with enzyme under a specific condition; and (b) Performing oxidatioin by running basic anion exchange resin with an oxidant to give (S)-3,4-dihydroxybutyric acid-anion exchange resin complex, dissociating the (S)-3,4-dihydroxybutyric acid from anion exchange resin complex and esterification sequentially under a specific condition.  wherein Represents linear or branched alkyl group with 1˜5 carbon atoms.
    • 本发明涉及用于制备由下式1表示的光学纯的(S)-3,4-二羟基丁酸衍生物的连续方法,更具体地说,涉及能够制备光学纯的(S)-3,4-二羟基丁酸衍生物的连续方法, 通过以下方式经济地制备二羟基丁酸衍生物:(a)通过使天然产物容易获得的支链淀粉与酶在特定条件下反应制备具有足够糖分布的α-(1,4)连接的寡糖; 和(b)通过用氧化剂运行碱性阴离子交换树脂来进行氧化,得到(S)-3,4-二羟基丁酸 - 阴离子交换树脂配合物,使(S)-3,4-二羟基丁酸与阴离子交换树脂复合物 并在特定条件下依次酯化。 其中表示具有1〜5个碳原子的直链或支链烷基。