Sialic acid derivatives and process therefor
    95.
    发明公开
    Sialic acid derivatives and process therefor 失效
    唾液酸衍生物及其加工方法

    公开(公告)号:EP0479769A2

    公开(公告)日:1992-04-08

    申请号:EP92100069.1

    申请日:1987-07-03

    申请人: MECT CORPORATION

    CPC分类号: C07H15/10 C07H3/06

    摘要: The present invention relates to sialic acid derivatives. According to the present invention, there is provided sialic acid derivatives having the general formula (I):

    wherein, R¹ represents hydrogen, an acetyl group, or a trityl group,
       R² represents hydrogen or an acetyl group,
       one of R³ and R⁴ represents chlorine, -OAc, -OH,

    , or

       (R⁷ represents a hydrogen atom or an acetyl group, R⁸ represents a hydrogen atom, an acetyl group or a benzyl group, R⁹ represents a hydrogen atom, an acetyl group, a benzyl group or

    or

    wherein R¹⁰ represents a hydrogen atom or a benzoyl group), while the other represents -COOR¹¹ wherein R¹¹ represents hydrogen, sodium, or a methyl group.

    摘要翻译: 本发明涉及唾液酸衍生物。 根据本发明,提供了具有通式(I)的唾液酸衍生物:其中R 1代表氢,乙酰基或三苯甲基,R 2代表氢或乙酰基,R 3和R 4之一代表氯 ,-OAc,-OH,或(R 8表示氢原子或乙酰基,R 7表示氢原子,乙酰基或苄基,R 7表示氢原子,乙酰基,苄基或 R 10代表氢原子或苯甲酰基),而另一个代表-COOR 11,其中R 11代表氢,钠或甲基。

    Sodium N-acetylneuraminate trihydrate and method for the preparation thereof
    100.
    发明公开
    Sodium N-acetylneuraminate trihydrate and method for the preparation thereof 失效
    硝基-N-乙酰神经氨酸三水合物和Verfahren zu dessen Herstellung。

    公开(公告)号:EP0386721A1

    公开(公告)日:1990-09-12

    申请号:EP90104335.6

    申请日:1990-03-07

    申请人: MECT CORPORATION

    IPC分类号: C07H15/12 C07H7/00

    CPC分类号: C07H13/04

    摘要: Sodium N-acetylneuraminate trihydrate herein provided is represented by the following formula:
    The sodium N-acetylneuraminate trihydrate can be prepared, for instance, according to a method which comprises the steps of: dissolving sodium N-acetylneuraminate in water or in a mixture of water and an organic solvent; allowing the resulting solution to stand; precipitating and separating the resulting crystals of sodium N-acetylneuraminate · trihydrate; and then drying the separated crystals. The sodium N-acetylneuraminate trihydrate has very low hygroscopicity and hence can be handled without any difficulty in the form of powder.

    摘要翻译: 本文提供的N-乙酰神经氨酸钠三水合物由下式表示: N-乙酰神经氨酸钠三水合物可以例如根据包括以下步骤的方法制备:N-乙酰神经氨酸钠溶于水或在 水和有机溶剂的混合物; 允许所得到的解决方案站立; 沉淀并分离得到的N-乙酰神经氨酸钠晶体。 三水; 然后干燥分离的晶体。 N-乙酰神经氨酸钠三水合物具有非常低的吸湿性,因此可以毫无困难地以粉末的形式进行处理。