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    • 3. 发明授权
    • Process for the production of 4-aryl-2 butanols from Taxus wallichiana
    • 从Taxus wallichiana生产4-芳基-2丁醇的方法
    • US06184367B2
    • 2001-02-06
    • US09358113
    • 1999-07-21
    • Sunil Kumar ChattopadhyayRam Prakash SharmaSushil Kumar
    • Sunil Kumar ChattopadhyayRam Prakash SharmaSushil Kumar
    • C07C3982
    • C07H15/18C07C37/004C07H1/08C07C39/11
    • The present invention provides a process for the production of two molecules of 4-aryl-2 butanols having the general formula 1 given below: Wherein R═H or glucose from the leaves of Taxus wallichiana, which comprises: (a) defatting air dried, pulverized leaves with aliphatic hydrocarbon solvents, (b) extracting the defatted leaves with chlorinated solvents and polar solvent successively at room temperature, (b) concentrating the chlorinated solvent soluble faction to a residue and treating the residue with aqueous solution of alkali and extracting with chlorinated solvents, (d) acidifying the alkali layer with mineral acid and extracting with ethyl acetate and concentrating the ethyl acetate phase to give compound of formula 1 where R═H, (e) concentrating the polar solvent fraction from step (b) to a residue and treating the residue with aqueous solution of alkali and extracting with chlorinated solvent, and (f) acidifying the alkali phase with mineral acid and extracting with ethyl acetate and concentrating the ethyl acetate to give compound of formula 1 where R=glucose.
    • 本发明提供了一种生产具有下列通式1的两分子的4-芳基-2丁醇的方法:其中R = H或来自红豆杉叶的葡萄糖,其包括:(a)将空气干燥脱脂, 用脂肪族烃溶剂粉碎叶片,(b)在室温下连续用氯化溶剂和极性溶剂萃取脱脂叶,(b)将氯化溶剂可溶部分浓缩至残留物,用碱水溶液处理残留物,用氯化物萃取 溶剂,(d)用无机酸酸化碱层并用乙酸乙酯萃取并浓缩乙酸乙酯相,得到其中R = H的式1化合物,(e)将步骤(b)的极性溶剂级分浓缩至残余物 并用碱水溶液处理残留物,用氯化溶剂萃取,(f)用无机酸酸化碱相,用乙酸乙酯萃取 并浓缩乙酸乙酯,得到其中R =葡萄糖的式1化合物。
    • 4. 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。
    • 5. 发明授权
    • Process for the production of important taxol analogues 10-deacetyl
taxol A, B, and C
    • 生产重要的紫杉醇类似物10-脱乙酰紫杉醇A,B和C的方法
    • US6028206A
    • 2000-02-22
    • US264383
    • 1999-03-05
    • Sunil Kumar ChattopadhyayRam Prakash SharmaSushil Kumar
    • Sunil Kumar ChattopadhyayRam Prakash SharmaSushil Kumar
    • C07D305/14
    • C07D305/14
    • The present invention relates to an improved process for the production of important taxol analogues 10-deacetyl taxol A,B and C of the formula (2) ##STR1## R=C.sub.6 H.sub.5 (10 deacetyl taxol A) =CH.sub.3 C.dbd.CHCH.sub.3 (10-deacetyl taxol B)=C.sub.5 H.sub.11 (10-deacetyl taxol C)where R represent C.sub.6 H.sub.5 (10-deacetyl taxol A) or, CH.sub.3 C.dbd.CHCH.sub.3 (10-deacetyl taxol B) or, C.sub.5 H.sub.11 (10-deacetyl taxol C) which comprises (a) dissolving the taxol analogues 7-xylosyl-10-deacetyl taxol A,B,C of the formula (1) ##STR2## R=C.sub.6 H.sub.5 (10 deacetyl taxol A) =CH.sub.3 C.dbd.CHCH.sub.3 (10-deacetyl taxol B)=C.sub.5 H.sub.11 (10-deacetyl taxol C)where R represents C.sub.6 H.sub.5 (taxol analogue A or xyloside A), or CH.sub.3 C.dbd.CHCH.sub.3 (taxol analogue B or xyloside B) or C.sub.5 H.sub.11 (taxol analogue C or xyloside C) in a polar solvent (b) reacting the resultant solution with periodate for 20-40 hours at 20-40.degree. C. to cleave the diol system of the xyloside into dialdehyde, (c) treating the generated dialdehyde in a mixture of polar solvent-organic acid mixture with salts of amines at 0-40.degree. C. for 12-18 hours and (d) isolating the 10-deacetyl taxol A,B,C by chromatography.
    • 本发明涉及生产重要的紫杉醇类似物的改进方法式(2)R = C6H5(10脱乙酰紫杉醇A)= CH 3 C = CHCH 3(10-脱乙酰紫杉醇B)的10-脱乙酰紫杉醇A,B和C = C5H11(10-脱乙酰紫杉醇C),其中R代表C6H5(10-脱乙酰紫杉醇A)或CH3C = CHCH3(10-脱乙酰紫杉醇B)或C5H11(10-脱乙酰紫杉醇C),其包含(a)溶解紫杉醇 类似物7-木糖基-10-脱乙酰紫杉醇A,B,C(式(1))R = C6H5(10脱乙酰紫杉醇A)= CH 3 C = CHCH 3(10-脱乙酰紫杉酚B)= C5H11(10-脱乙酰紫杉醇C) R表示极性溶剂中的C6H5(紫杉酚类似物A或木糖苷A)或CH 3 C = CHCH 3(紫杉酚类似物B或木糖苷B)或C 5 H 11(紫杉酚类似物C或木糖苷C)(b)使所得溶液与高碘酸盐反应20- 在20-40℃下40小时将木糖苷的二醇体系切割成二醛,(c)在极性溶剂 - 有机酸混合物与胺盐的混合物中在0-40℃下处理所生成的二醛12 -18小时 d(d)通过色谱分离10-脱乙酰紫杉醇A,B,C。
    • 6. 发明授权
    • Process for the preparation of 10-deacetylbaccatin III
    • 制备10-脱乙酰基浆果赤霉素III的方法
    • US06437154B1
    • 2002-08-20
    • US09963768
    • 2001-09-28
    • Sunil Kumar ChattopadhyaySachin SrivastavaVijay Kumar Mehta
    • Sunil Kumar ChattopadhyaySachin SrivastavaVijay Kumar Mehta
    • C07D30514
    • C07D305/14
    • The present invention discloses a process for the conversion of a mixture of taxol analogues 7-xylosyl-10-deacetylbaccatin taxols of the formula 2 where R is C6H5, CH3C═CHCH3 or C5H11 into 10-deacetylbaccatin III of the formula 1 by dissolving the taxol analogue of formula 2 in a polar solvent, reacting the resultant solution with a base at a temperature of 20-50° C. for a time period in the range of 20-40 hours, and isolating 7-xyloxyl-10-deacetylbaccatin III, dissolving the 7-xylosyl-10-deacetylbaccatin III in a polar solvent, reacting the resultant solution with a periodate at 20-40° C. for a time period in the range of 20-40 hours to cleave the diol system of the xyloside into dialdehyde, treating the generated dialdehyde in an organic acid medium with salts of amine at 0-40° C. for 12-18 hours and isolating 10-deacetylbaccatin III of formula 1.
    • 本发明公开了一种将式2的紫杉醇类似物7-木糖基-10-脱乙酰基浆果赤霉素类紫杉醇的混合物,其中R为C6H5,CH3C = CHCH3或C5H11,转化为式1的10-脱乙酰基浆果赤霉素Ⅲ的方法, 式2在极性溶剂中,使所得溶液与碱在20-50℃的温度下反应20-40小时的时间,并分离7-木糖基-10-脱乙酰基浆果赤霉素III,将 7-木糖基-10-脱乙酰基浆果赤霉素III在极性溶剂中,使所得溶液与20-40℃的高碘酸盐反应20-40小时的时间段,将木糖苷的二醇体系切割成二醛, 在有机酸介质中用胺的盐在0-40℃处理生成的二醛12-18小时,并分离出式1的10-脱乙酰基浆果赤霉素III。