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    • 4. 发明授权
    • Methods and useful intermediates for paclitaxel synthesis from C-7, C-10 di-cbz 10-deacetylbaccatin III
    • 从C-7,C-10 di-cbz 10-脱乙酰基浆果赤霉素III合成紫杉醇的方法和有用的中间体
    • US06448417B1
    • 2002-09-10
    • US09674404
    • 2001-01-11
    • Nicholas J. SistiHerbert R. BrinkmanJames D. McChesneyMedhavi C. ChanderXian LiangJan Zygmunt
    • Nicholas J. SistiHerbert R. BrinkmanJames D. McChesneyMedhavi C. ChanderXian LiangJan Zygmunt
    • C07D30514
    • C07D305/14Y02P20/55
    • The present invention relates to a method of producing paclitaxel or a paclitaxel analog comprising the esterification of C-7, C-10 di-CBZ 10-deacetylbaccatin III with an N-carbamate protected, C-2-protected 3-phenyl isoserine side chain. The C-7, C-10 carbobenzyloxy groups are then replaced with hydrogen and an acyl group is substituted at the C-3′ nitrogen. The resulting compound is acylated at the C-10 hydroxyl position, and deprotected at the C-2′ position by replacing the hydroxyl protecting group with hydrogen to produce paclitaxel or a paclitaxel analog. The present invention also relates to alternative methods of acylating a 10-hydroxy paclitaxel analog. The first method comprises dissolving a 10-hydroxy paclitaxel analog in an acceptable ether solvent therefor to form a first solution at a first temperature. The first solution is then cooled to a second temperature, and an alkali base is added to form an intermediate compound having a metal alkoxide at the C-10 position thereof, after which an acylating ageht is then added. The second method comprises dissolving a 10-hydroxy paclitaxel analog in an acceptable ether solvent therefor. An alkali salt is added, and a trialkyl amine base or pyridine is next added, followed by the addition of an acylating agent. The present invention is additionally directed to a C-10 metal alkoxide chemical intermediate for use in producing paclitaxel or paclitaxel analogs.
    • 本发明涉及一种制备紫杉醇或紫杉醇类似物的方法,其包括将C-7,C-10二-CZZ 10-脱乙酰基浆果赤霉素III与N-氨基甲酸酯保护的C-2-保护的3-苯基异丝氨酸侧链酯化 。 然后用氢代替C-7,C-10苄氧羰基,酰基在C-3'氮取代。 所得化合物在C-10羟基位置被酰化,并通过用氢代替羟基保护基而在C-2'位上去保护以产生紫杉醇或紫杉醇类似物。 本发明还涉及酰化10-羟基紫杉醇类似物的替代方法。 第一种方法包括将10-羟基紫杉醇类似物溶解在可接受的醚溶剂中以在第一温度下形成第一溶液。 然后将第一溶液冷却至第二温度,加入碱碱以形成其C-10位具有金属醇盐的中间体化合物,之后加入酰化时间。 第二种方法包括将10-羟基紫杉醇类似物溶解在可接受的醚溶剂中。 加入碱金属盐,然后加入三烷基胺碱或吡啶,然后加入酰化剂。 本发明另外涉及用于生产紫杉醇或紫杉醇类似物的C-10金属醇盐化学中间体。
    • 8. 发明授权
    • Efficient process for the production of 10-DAB III by selective hydrazinolysis of various taxanes
    • 通过各种紫杉烷的选择性肼解,生产10-DAB III的有效方法
    • US06495705B2
    • 2002-12-17
    • US09899831
    • 2001-07-05
    • Madhavi C. ChanderJames D. McChesney
    • Madhavi C. ChanderJames D. McChesney
    • C07D30514
    • C07D305/14
    • The present invention describes a process for producing 10-deacetyl baccatin III from a solution containing a solvent reactive with hydrazine hydrate and a spectrum of taxanes. The solution is contacted with hydrazine hydrate thereby converting some taxanes therein into 10-deacetyl baccatin III. The process can target taxanes having an ester functionality on at least one of the C-10 and C-13 positions. The hydrazine hydrate cleaves the ester functionality of the taxane solute, The process may be used to produce 10-deacetyl baccatin III from a biomass extract by contacting the biomass extract with a mixture of a solvent and a hydrazine hydrate. The solvent may have a functional group that is cleaved by hydrazine. Acetate solvents are contemplated.
    • 本发明描述了从含有与水合肼反应的溶剂和紫杉烷类的溶液的溶液中制备10-脱乙酰浆果赤霉素III的方法。 将溶液与水合肼接触,由此将其中的一些紫杉烷转化为10-脱乙酰浆果赤霉素III。 该方法可以靶向在C-10和C-13位置中的至少一个上具有酯官能团的紫杉烷。 水合肼切割紫杉烷溶质的酯官能团。该方法可用于通过使生物质提取物与溶剂和水合肼的混合物接触从生物质提取物中产生10-脱乙酰浆果赤霉素III。 溶剂可以具有被肼切割的官能团。 预期醋酸溶剂。