Crystalline 1&agr;-hydroxyvitamin D2 and method of purification thereof
    1.
    发明授权
    Crystalline 1&agr;-hydroxyvitamin D2 and method of purification thereof 失效
    结晶1α-羟基维生素D2及其纯化方法

    公开(公告)号:US06462031B2

    公开(公告)日:2002-10-08

    申请号:US09738483

    申请日:2000-12-15

    IPC分类号: A61K31592

    CPC分类号: C07C401/00

    摘要: A method of purifying 1&agr;-hydroxyvitamin D2 to obtain 1&agr;-hydroxyvitamin D2 in crystalline form. The method includes the steps of boiling a solvent selected from the group consisting of ethyl formate, ethyl acetate and a 2-propanol-hexane mixture under inert atmosphere, dissolving a product containing 1&agr;-hydroxyvitamin D2 to be purified in the solvent, cooling the solvent and dissolved product below ambient temperature for a sufficient amount of time to form a precipitate of 1&agr;-hydroxyvitamin D2 crystals, and recovering the 1&agr;-hydroxyvitamin D2 crystals. Petroleum ether is also added to the solvent after dissolving the product to be purified in the solvent.

    摘要翻译: 一种纯化1α-羟基维生素D2以获得结晶形式的1α-羟基维生素D 2的方法。 该方法包括在惰性气氛下沸腾选自甲酸乙酯,乙酸乙酯和2-丙醇 - 己烷混合物的溶剂的步骤,将待纯化的含有α-羟基维生素D2的产物溶解在溶剂中,冷却溶剂 并将产物低于环境温度溶解足够的时间以形成1α-羟基维生素D2晶体的沉淀物,并回收1α-羟基维生素D 2晶体。 将待纯化的产物溶解在溶剂中之后,也将石油醚加入到溶剂中。

    Crystalline 1&agr;, 24(S)-dihydroxyvitamin D2 and method of purification thereof
    2.
    发明授权
    Crystalline 1&agr;, 24(S)-dihydroxyvitamin D2 and method of purification thereof 失效
    结晶1α,24(S) - 二羟基维生素D2及其纯化方法

    公开(公告)号:US06362350B1

    公开(公告)日:2002-03-26

    申请号:US09437307

    申请日:1999-11-10

    IPC分类号: C07C40100

    CPC分类号: C07C401/00

    摘要: A method of purifying 1&agr;,24(S)-dihydroxyvitamin D2 to obtain 1&agr;,24(S)-dihydroxyvitamin D2 in crystalline form. The method includes the steps of boiling a solvent under inert atmosphere, dissolving a product containing 1&agr;,24(S)-dihydroxyvitamin D2 to be purified in the solvent, cooling the solvent and dissolved product below ambient temperature for a sufficient amount of time to form a precipitate of 1&agr;,24(S)-dihydroxyvitamin D2 crystals, and recovering the 1&agr;,24(S)-dihydroxyvitamin D2 crystals. The purification technique involves using one of several binary solvent systems, namely, acetone and hexane, 2-propanol and hexane, or ethyl formate and petroleum ether.

    摘要翻译: 纯化1α,24(S) - 二羟基维生素D 2以获得结晶形式的1α,24(S) - 二羟基维生素D 2的方法。 该方法包括在惰性气氛下沸腾溶剂的步骤,将待纯化的1α,24(S) - 二羟基维生素D2的产物溶解在溶剂中,将溶剂和溶解的产物在环境温度下冷却足够的时间以形成 1(S) - 二羟基维生素D 2晶体的沉淀物,并回收1α,24(S) - 二羟基维生素D 2晶体。 纯化技术涉及使用几种二元溶剂体系之一,即丙酮和己烷,2-丙醇和己烷,或甲酸乙酯和石油醚。

    Crystalline 1&agr;-hydroxyvitamin D2 and method of purification thereof
    3.
    发明授权
    Crystalline 1&agr;-hydroxyvitamin D2 and method of purification thereof 有权
    结晶1α-羟基维生素D2及其纯化方法

    公开(公告)号:US06432936B1

    公开(公告)日:2002-08-13

    申请号:US09233738

    申请日:1999-01-20

    IPC分类号: A61K31592

    CPC分类号: C07C401/00

    摘要: A method of purifying 1&agr;-hydroxyvitamin D2 to obtain 1&agr;-hydroxyvitamin D2 in crystalline form. The method includes the steps of boiling a solvent selected from the group consisting of ethyl formate, ethyl acetate and a 2-propanol-hexane mixture under inert atmosphere, dissolving a product containing 1&agr;-hydroxyvitamin D2 to be purified in the. solvent, cooling the solvent and dissolved product below ambient temperature for a sufficient amount of time to form a precipitate of 1&agr;-hydroxyvitamin D2 crystals, and recovering the 1&agr;-hydroxyvitamin D2 crystals. Optionally, petroleum ether may be added to the solvent after dissolving the product to be purified in the solvent.

    摘要翻译: 一种纯化1α-羟基维生素D2以获得结晶形式的1α-羟基维生素D 2的方法。 该方法包括在惰性气氛下沸腾选自甲酸乙酯,乙酸乙酯和2-丙醇 - 己烷混合物的溶剂的步骤,将待纯化的含有1α-羟基维生素D2的产物溶解于其中。 溶剂,将溶剂和溶解的产物在环境温度以下冷却足够的时间以形成1α-羟基维生素D2晶体的沉淀物,并回收1α-羟基维生素D 2晶体。 任选地,在将要纯化的产物溶解在溶剂中之后,可以将石油醚加入到溶剂中。