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    • 6. 发明授权
    • Process for the production of taxol
    • 紫杉醇生产工艺
    • US5856532A
    • 1999-01-05
    • US909810
    • 1997-08-12
    • Sunil Kumar ChattopadhyayRam Prakash SharmaSushil KumarKunnath Padmanabhan Madhusudanan
    • Sunil Kumar ChattopadhyayRam Prakash SharmaSushil KumarKunnath Padmanabhan Madhusudanan
    • A61K31/335A61K31/337A61K36/18A61P35/00C07C13/26C07D305/14
    • C07D305/14
    • A process has been developed for production of taxols A, B, C with high yields from 7-xylosyl-10-deacetyl taxol A (taxol analogue A or, xyloside A), 7-xylosyl-10-deacetyl-taxol B (taxol analogue B or xyloside B), 7-xylosyl-10-deacetyl--taxol C (taxol analogue C or xyloside C), which comprises (i) isolating the taxol analogues A, B, C form the stembark of Taxus wallichiana by an improved process devoiding of solvent partitioning step, (ii) treating the isolated taxol analogues A, B, C with periodates in an acid free polar solvent medium to cleave the diol into dialdehyde at ambient temperature, (iii) reducing the dialdehyde solution with borohydride in a polar solvent--acetic acid medium at 0.degree.-40.degree. C. into an acetal, (iv) acidifying the resultant acetal with a mixture of mineral acid-polar solvent at 0.degree.-40.degree. C. into intermediate product 10-deacetyl taxols A, B, C, (V) reacting 10-deacetyl taxols A or B or C with a silane in presence of a base at 20.degree.-40.degree. C. to protect 2', 7-hydroxyl groups, of 10-deacetyl taxols A, B, C (vi) acetylating the 10-hydroxyl group in situ with an acetylating agent at 10.degree.-40.degree. C., (vii) deprotecting the 2', 7-hydroxyl groups with a mixture of mineral acid-polar solvent at 0.degree.-10.degree. C. (viii) isolating taxols A or B or C by chromatography over silica.
    • 已经开发了用于从7-木糖基-10-脱乙酰紫杉醇A(紫杉醇类似物A或木糖苷A),7-木糖基-10-脱乙酰基紫杉醇B(紫杉醇类似物)的高收率生产紫杉醇A,B,C的方法 B或木糖苷B),7-木糖基-10-脱乙酰基紫杉醇C(紫杉醇类似物C或木糖苷C),其包括(i)通过改进的方法脱除紫杉醇类似物A,B,C形成紫杉属 的溶剂分配步骤,(ii)在酸性极性溶剂介质中用高碘酸盐处理分离的紫杉酚类似物A,B,C,以在环境温度下将二醇切割成二醛,(iii)用极性溶剂中的硼氢化物还原二醛溶液 - 乙酸培养基在0°-40℃进入缩醛,(iv)在0-40℃下用无机酸 - 极性溶剂的混合物将所得缩醛酸化成中间产物10-脱乙酰基紫杉醇A,B C,(Ⅴ)在20℃-40℃下,使10-脱乙酰基的紫杉醇A或B或C与硅烷反应,保护2' ,10-脱乙酰基紫杉醇A,B,C(vi)的7-羟基,(vi)在10°-40℃用乙酰化剂原位乙酰化10-羟基,(vii)使2',7- 羟基与无机酸极性溶剂的混合物在0-10℃下进行。(viii)通过硅胶色谱分离紫杉醇A或B或C。