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    • 4. 发明授权
    • Novel 1.alpha.,24-dihydroxycholecalciferol compositions, novel
precursors thereof, and processes for preparing them
    • 新型1 {60,24-二羟基胆钙化甾醇组合物,其新型前体及其制备方法
    • US4022891A
    • 1977-05-10
    • US583115
    • 1975-06-02
    • Toru TakeshitaYoshinobu HashimotoHiroyuki KawashimaSachio IshimotoNobuo IkekawaMasuo Morisaki
    • Toru TakeshitaYoshinobu HashimotoHiroyuki KawashimaSachio IshimotoNobuo IkekawaMasuo Morisaki
    • A23K1/16C07J9/00C07J71/00A61K31/59
    • C07J9/00A23K20/174C07J71/001Y02P20/55
    • Novel 1.alpha., 24-dihydroxycholecalciferol and derivatives thereof which are useful with reduced side-effects for the treatment of abnormal metabolism of calcium and phosphorus caused by liver failure, renal failure, gastrointestinal tract failure and parathyroid failure, and related bone diseases. Preparation of the novel 1.alpha., 24-dihydroxycholecalciferol and their derivatives starts from 1.alpha., 24-dihydroxycholesterol prepared by reacting 1.alpha., 2.alpha.-epoxy-24-keto-cholesta-4,6-dien-3-one with an alkali metal and a proton donor in the presence of liquid ammonia or a liquid amine. Reaction of the 1.alpha., 24-dihydroxycholesterol with an allylic brominating agent, followed by contacting with a dehydrobrominating agent, affords 1.alpha.,3.beta., 24-trihydroxycholesta-5,7-diene derivative, which can then be converted to 1.alpha., 24-dihydroxycholocalciferol by ultraviolet irradiation in a organic solvent, followed by isomerization. Processes are also provided for separating 1.alpha., 24-dihydroxycholesterol into an (S)-epimer and an (R)-epimer, and also for separating at least one of 1.alpha., 3.beta., 24(S)-and 1.alpha., 3.beta., 24(R)-trihydroxycholesta-5,7-dienes from trihydroxycholesta-4,6-diene.
    • 用于治疗由肝衰竭,肾衰竭,胃肠道衰竭和甲状旁腺功能衰竭引起的钙和磷的异常代谢的副作用的新型1α,24-二羟基胆钙化甾醇及其衍生物以及相关的骨疾病。 1α,24-二羟基胆钙化甾醇及其衍生物的制备从1α,24-二羟基胆固醇开始,其通过使1α,2α-环氧-24-酮 - 胆甾烯-4,6-二烯-3-酮与碱 金属和质子供体在液态氨或液态胺存在下进行。 1α,24-二羟基胆固醇与烯丙基溴化剂的反应,然后与脱氢溴化剂接触,得到1α,3β,24-三羟基胆甾-5,7-二烯衍生物,然后将其转化为1α, 通过紫外线照射在有机溶剂中进行异构化,得到24-二羟基胆钙化甾醇。 还提供了用于将1α,24-二羟基胆固醇分离成(S) - 对映体和(R) - 对映体的方法,还用于分离1α,3β,24(S) - 和1α, 3β,24(R) - 三羟基胆甾-5,7-二烯的三羟基胆甾-4,6-二烯。