Process for preparation of 1.alpha.,25-dihydroxycholecalciferol
    12.
    发明授权
    Process for preparation of 1.alpha.,25-dihydroxycholecalciferol 失效
    制备1 {60,25-二羟基胆钙化甾醇的方法

    公开(公告)号:US4022768A

    公开(公告)日:1977-05-10

    申请号:US657375

    申请日:1976-02-12

    IPC分类号: C07J9/00 C07J71/00

    CPC分类号: C07J71/0042 C07J9/00

    摘要: 1.alpha.,25-dihydroxycholecalciferol is prepared by reacting 1,5,7-trien-3.beta.,25-diol with a 1,2,4-triazoline-dione derivative represented by the formula: ##STR1## wherein R represents an alkyl group or an aryl or substituted-aryl group; reacting the resulting 1,4-cyclic adduct represented by the general formula ##STR2## wherein R is as defined above, with a peroxide to form a 1.alpha.,2.alpha.-epoxide compound represented by the general formula ##STR3## wherein R is as defined above, reducing the so formed compound with a metal hydride to form cholesta-5,7-diene-1.alpha.,3.beta.,25-triol, irradiating the so formed compound with ultraviolet rays to form 1.alpha.,25-dihydroxyprevitamin D.sub.3, isomerizing the so formed previtamin D.sub.3, and recovering 1.alpha.,25-dihydroxycholecalciferol.

    摘要翻译: 1α,25-二羟基胆钙化醇通过使1,5,7-三烯-3β,25-二醇与下式表示的1,2,4-三唑啉二酮衍生物反应制备:其中R表示烷基 或芳基或取代的芳基; 使得到的由通式“IMAGE”表示的所得1,4-环加成物与上述定义相同,与过氧化物反应,形成由通式“IMAGE”表示的1α,2α-环氧化合物,其中R为 用金属氢化物还原形成的化合物以形成胆甾烯-5,7-二烯-1α,3β,25-三醇,用紫外线照射所形成的化合物以形成1α,25-二羟维生素D3, 异构化所形成的维生素D3,并回收1α,25-二羟基胆钙化甾醇。