METHODS FOR MAKING SACCHARIDE-PROTEIN GLYCOCONJUGATES
    28.
    发明申请
    METHODS FOR MAKING SACCHARIDE-PROTEIN GLYCOCONJUGATES 审中-公开
    制备海草蛋白糖蛋白的方法

    公开(公告)号:US20160297895A1

    公开(公告)日:2016-10-13

    申请号:US15150302

    申请日:2016-05-09

    IPC分类号: C08B37/00

    摘要: The invention provides a process for the reductive amination of a carbonyl group at the reducing terminus of a polysaccharide, wherein the reductive amination is carried out at a pH between 4 and 5. The invention also provides a process for preparing a conjugate of a polysaccharide and a carrier molecule, comprising the steps of: (a) coupling the polysaccharide to a linker, to form a polysaccharide-linker compound in which the free terminus of the linker is an ester group; and (b) reacting the ester group with a primary amine group in the carrier molecule, to form a polysaccharide-linker-carrier molecule conjugate in which the linker is coupled to the carrier molecule via an amide linkage. The invention also provides a process for reducing contamination of a polysaccharide-linker compound with unreacted linker, comprising a step of precipitating unreacted linker under aqueous conditions at a pH of less than 5. The invention also provides polysaccharide-linker-carrier molecule conjugates and intermediate compounds obtained or obtainable by these processes.

    摘要翻译: 本发明提供了在多糖的还原末端还原胺化羰基的方法,其中还原胺化在pH4至5之间进行。本发明还提供了制备多糖和 载体分子,其包括以下步骤:(a)将多糖偶联至接头,以形成其中接头的游离末端为酯基的多糖 - 接头化合物; 和(b)在载体分子中使酯基与伯胺基反应,以形成多糖 - 连接体 - 载体分子缀合物,其中连接体经由酰胺键与载体分子偶联。 本发明还提供了一种减少多糖 - 接头化合物与未反应接头的污染的方法,包括在pH小于5的水性条件下沉淀未反应的接头的步骤。本发明还提供多糖 - 接头 - 载体分子缀合物和中间体 通过这些方法获得或可获得的化合物。

    Method for extracting brown algae polysaccharide via microwave chemical process
    30.
    发明授权
    Method for extracting brown algae polysaccharide via microwave chemical process 有权
    通过微波化学过程提取褐藻多糖的方法

    公开(公告)号:US09447199B2

    公开(公告)日:2016-09-20

    申请号:US14355535

    申请日:2012-11-01

    IPC分类号: C08B37/00 C08L5/04

    摘要: This invention relates to an extraction process of brown algae polysaccharides in a field of pharmaceutical chemistry. This invention particularly discloses a process of extracting brown algae polysaccharides based on a microwave chemistry method and brown algae polysaccharides obtained by said process. The process of the invention comprises: 1) putting pulverized brown algae powder into a microwave reaction chamber, adding acid solution to conduct reaction; optionally concentrating the mixer, and then washing with organic solvent to remove excess acid; conducting grading alcohol precipitation after water extract to obtain mannuronic acid rich fragment (M rich) algin, fucoidan and/or laminaran respectively; and adding an alkali solution to the brown algae residue to conduct alkaline digestion, filtering the residue off, adjusting pH of the filtrate to neutral, conducting alcohol precipitation to obtain guluronic acid rich fragment (G rich) algin precipitates. The present invention has significant advantages like fast processing rate, high yield of polysaccharides, strong controllable polysaccharide degradation, using less organic acid and efficient recovery, small water consumption, low power consumption, etc., the active polysaccharides has high yield and content, better water-soluble, and good biological activities.

    摘要翻译: 本发明涉及药物化学领域中褐藻多糖的提取方法。 本发明特别公开了一种基于微波化学方法提取褐藻多糖的方法和通过所述方法获得的褐藻多糖。 本发明的方法包括:1)将粉碎的褐藻粉放入微波反应室中,加酸溶液进行反应; 任选地浓缩混合器,然后用有机溶剂洗涤以除去过量的酸; 在水提取物后进行分级酒精沉淀,分别得到富含甘露糖醛酸的片段(富M),藻酸盐和/或层流蛋白; 并向棕色藻类残渣中加入碱溶液进行碱性消化,过滤残余物,调节滤液pH至中性,进行酒精沉淀,得到富含富罗勒浓的片段(富G)藻酸盐沉淀物。 本发明具有加工速度快,多糖收率高,多糖降解可靠,有机酸少,有效回收,耗水量少,功耗低等优点,活性多糖具有较高的产量和含量,较好的 水溶性好,生物活性好。