会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 35. 发明授权
    • The process for preparing 6-deoxynthracyclines
    • 6-脱氧蒽环的制备方法
    • US4939282A
    • 1990-07-03
    • US622177
    • 1984-06-19
    • Francesco AngelucciSergio PencoErmes VanottiFederico Arcamone
    • Francesco AngelucciSergio PencoErmes VanottiFederico Arcamone
    • C07C50/38A61K31/70A61K31/7028A61K31/7034A61K31/704A61P35/00C07C45/00C07C46/00C07C50/36C07C67/00C07D407/04C07H15/252
    • C07D407/04C07H15/252
    • A new process for the preparation of 6-deoxyanthracyclinones of general formula I: ##STR1## wherein R represents a hydrogen atom, a hydroxy group or a lower alkoxy group is described. The process provides a total synthesis of the 6-deoxyanthracyclinones of formula I using 1,2,3,6-tetrahydro-phthalate as starting material. The obtained racemic mixture of the compounds of formula I, if desired, can be submitted to optical resolution by the conventional method of conversion to diastereomeric derivatives using a chiral resolving agent. Alternatively, the racemic mixture can be used as such for the condensation with a suitably protected halosugar derivative to obtain alpha glycosidic derivatives of formula XV: ##STR2## wherein R.sub.1 represents a hydrogen atom or a hydroxy group, one of R.sub.2 and R.sub.3 represents a hydrogen atom, the other of R.sub.2 and R.sub.3 represents a hydrogen atom or a hydroxy group and X is a hydrogen atom or a trifluoro acetyl group. The N-trifluoroacetyl 7S:9S and 7R:9R derivatives of the .alpha.-glycosides of formula XV can be separated by chromatography on silica gel to obtain, after mild alkaline hydrolisis the wanted 7S:9S .alpha.-glycosides (R.sub.1 =H) as free bases and can eventually be transformed into their corresponding doxorubicin derivatives (R.sub.1 =OH) by known procedures.
    • 描述了制备通式I的6-脱氧尿嘧啶的新方法:其中R表示氢原子,羟基或低级烷氧基。 该方法提供使用1,2,3,6-四氢邻苯二甲酸酯作为起始原料的式I的6-脱氧蒽环类的全合成。 如果需要,所得到的式I化合物的外消旋混合物可以通过使用手性拆分剂转化成非对映体衍生物的常规方法进行光学拆分。 或者,外消旋混合物可以直接用于与适当保护的卤糖衍生物的缩合,以获得式XV的α糖苷衍生物:其中R 1表示氢原子或羟基,R 2和R 3之一表示 氢原子,R2和R3中的另一个表示氢原子或羟基,X是氢原子或三氟乙酰基。 式XV的α-糖苷类的N-三氟乙酰基7S:9S和7R:9R衍生物可以通过硅胶色谱分离,得到在温和的碱性水解后,所需的7S:9Sα-糖苷(R1 = H)为游离 碱,并且最终可以通过已知的方法转化成它们相应的多柔比星衍生物(R1 = OH)。