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    • 1. 发明授权
    • Process for the preparation of active-type vitamin D.sub.3 compounds
    • 活性型维生素D3化合物的制备方法
    • US4388243A
    • 1983-06-14
    • US371870
    • 1982-04-26
    • Osamu NishikawaKenji IshimaruToru TakeshitaHideki Tsuruta
    • Osamu NishikawaKenji IshimaruToru TakeshitaHideki Tsuruta
    • C07J9/00
    • C07J9/00Y02P20/55Y02P20/582
    • The present invention relates to a novel process for the preparation of active-type vitamin D.sub.3 compounds and their intermediates. In accordance with the present invention, a large amount of an active-type vitamin D.sub.3 compounds, for example 1.alpha.-hydroxycholecalciferol, 1.alpha.,25-dihydroxycholecalciferol and the like, is efficiently prepared with high industrial advantages by a novel processes, which comprises (i) reacting hydroxycholesta-5-enes having the hydroxyl groups protected with lower alkoxycarbonyl group as a starting material with allylic brominating agent and dehydrobrominating agent to prepare the corresponding hydroxycholesta-5,7-dienes, (ii) exposing the hydroxycholesta-5,7-dienes to ultraviolet irradiation or to a combination of the irradiation with thermal isomerization to obtain a mixture of the unreacted hydroxycholesta-5,7-dienes and previtamin D.sub.3 compounds or a mixture of the unreacted hydroxycholesta-5,7-dienes and the protected active-type vitamin D.sub.3 compounds, (iii) separating the mixture into the unreacted hydroxycholesta-5,7-dienes and previtamin D.sub.3 compounds or the protected active-type vitamin D.sub.3 compounds, (iv) recycling the unreacted hydroxycholesta-5,7-dienes as reuse and (v) thermally isomerizing the remaining compounds and/or splitting off the protective groups. The process for the preparation of active-type vitamin D.sub.3 compounds, in the present invention, is of very high industrial value, capable of carrying out by simple operation and adaptable to large scale commercial production.
    • 本发明涉及一种制备活性型维生素D3化合物及其中间体的新方法。 根据本发明,通过新工艺有效地制备了大量活性型维生素D3化合物,例如1α-羟基胆钙化甾醇,1α,25-二羟基胆钙化甾醇等,具有高工业优势,其包括 (i)使具有被低级烷氧基羰基保护的羟基作为起始原料的羟基胆甾-5-烯与烯丙基溴化剂和脱溴溴化剂反应以制备相应的羟基胆甾-5,7-二烯,(ii)将羟基胆甾-5, 7-二烯对紫外线照射或通过热异构化的照射的组合,得到未反应的羟基胆甾-5,7-二烯和维生素D3化合物的混合物或未反应的羟基胆甾-5,7-二烯与受保护的 活性型维生素D3化合物,(iii)将混合物分离成未反应的羟基胆甾-5,7-二烯和维生素D3化合物或受保护的活性 (iv)将未反应的羟基胆甾-5,7-二烯再循环使用,和(v)使其余化合物热异构化和/或分离保护基团。 在本发明中制备活性型维生素D3化合物的方法具有非常高的工业价值,能够通过简单的操作进行并适应于大规模的商业生产。
    • 3. 发明授权
    • 25-Hydroxy-24-oxocholestane derivatives and preparation thereof
    • 25-羟基-24-氧代胆乙醇衍生物及其制备
    • US4292249A
    • 1981-09-29
    • US121857
    • 1980-02-15
    • Osamu NishikawaKenji IshimaruToru TakeshitaHideki Tsuruta
    • Osamu NishikawaKenji IshimaruToru TakeshitaHideki Tsuruta
    • C07J9/00C07J17/00
    • C07J17/00C07J9/00
    • This invention relates to novel 25-hydroxy-24-oxocholestane derivatives and a process for preparing them.The novel 25-hydroxy-24-oxocholestane derivatives of this invention can easily be converted to 24,25-dihydroxycholecalciferol or 1.alpha.,24,25-trihydroxycholecalciferol which is known as useful for medicine controlling the calcium metabolism of warm-blooded animals. Moreover, 25-hydroxy-24-oxocholestane derivatives can be converted to novel 25-hydroxy-24-oxocholecalciferol expressed by the following formula ##STR1## and novel 1.alpha.,25-dihydroxy-24-oxocholecalciferol of the formula ##STR2## which are useful for medicine. The new 25-hydroxy-24-oxocholestane derivatives in the present invention are very useful as the intermediates for the synthesis of a variety of active vitamin D.sub.3.
    • 本发明涉及新的25-羟基-24-氧代胆乙醇衍生物及其制备方法。 本发明的新型25-羟基-24-氧代胆乙醇衍生物可以容易地转化为24,25-二羟基胆钙化甾醇或1α,24,25-三羟基胆钙化甾醇,其已知可用于控制温血动物钙代谢的药物。 此外,可以将25-羟基-24-氧代胆乙醇衍生物转化为由下式表示的新型25-羟基-24-氧代胆钙化甾醇和式(IMAGE)的新型1α,25-二羟基-24-氧代胆钙化甾醇,其为 有用的药物。 本发明中的新的25-羟基-24-氧代胆乙醇衍生物作为合成各种活性维生素D3的中间体是非常有用的。
    • 8. 发明授权
    • 3-Methylene cephalosporanic acid derivatives and process for preparation
thereof
    • 3-亚甲基头孢菌酸衍生物及其制备方法
    • US4138553A
    • 1979-02-06
    • US841321
    • 1977-10-11
    • Sachio IshimotoHisao YamaguchiYoshinori KatoTakeo ObaKenji OzawaYataro IchikawaKoji NakagawaHideki Tsuruta
    • Sachio IshimotoHisao YamaguchiYoshinori KatoTakeo ObaKenji OzawaYataro IchikawaKoji NakagawaHideki Tsuruta
    • C07D499/00C07D501/10C07D501/02
    • C07D499/00Y02P20/55
    • Novel substituted hydrazide derivatives of 7-(substituted)amino-3-methylene-cepham-4-carboxylic acids expressed by the formula ##STR1## wherein R.sub.1 represents alkyl containing at least 3 carbon atoms, cycloalkyl, or optionally substituted aryl, and one of R.sub.2 and R.sub.3 represents hydrogen with the other being hydrogen or the same as R.sub.1 ; or R.sub.1 and R.sub.2 form a heterocyclic ring optionally through a hetero atom together with the attached nitrogen and R.sub.3 represents hydrogen atom; and Z.sub.1 represents amino or protected amino; and acid addition salts thereof, which are useful as intermediates for synthesizing cephalosporin antibiotics. These compounds can be prepared in high yields from the corresponding substituted hydrazide derivatives of 6-substituted amino-1-oxide-2, 2-dimethyl-penam-3-carboxylic acids, which are readily available at low costs, by heating them in the presence of a thermal rearrangement promotor such as organic sulfonic acids and optionally in the further presence of a tertiary nitrogen-containing cyclic compound, followed if desired by splitting off the amino-protecting group and converting the product to acid addition salts.
    • 由式“IMAGE”表示的7-(取代的)氨基-3-亚甲基 - 头孢烯-4-羧酸的新型取代的酰肼衍生物,其中R 1表示含有至少3个碳原子的烷基,环烷基或任选取代的芳基, R2和R3代表氢,另一个是氢或与R1相同; 或R 1和R 2与所连接的氮一起任选地通过杂原子形成杂环,并且R 3表示氢原子; Z1表示氨基或被保护的氨基; 其酸加成盐,其可用作合成头孢菌素抗生素的中间体。 这些化合物可以以相当于6-取代的氨基-1-氧化物-2,2-二甲基 - 对甲苯磺酸的取代的酰肼衍生物的高收率制备,它们以低成本容易获得,通过在 存在热重排促进剂如有机磺酸,并且任选地在另外存在叔氮气环状化合物的情况下,如果需要的话,分解氨基保护基并将产物转化成酸加成盐。