申请人:Robin Jean-Pierre
公开号:US20050090484A1
公开(公告)日:2005-04-28
The present invention concerns a new general process for asymmetric hemisynthesis of harringtonines and their analogs, that are alkaloids used in chemotherapy. This process comprises direct esterification of a natural cephalotaxine with an acylating compound constituted of a side chain precursor which backbone and functionalization are entirely preformed. The invention also concerns a natural, synthetic or semi-synthetic harringtonines including their tautomeric forms and their salts of the following formula:
wherein n=2 (i.e. harringtonine) or n=3 (i.e. homoharringtonine), in which the total content of impurities, possibly including enantiomeric forms, is lower than 1%, and/or the content of the major impurity is lower than 0.9%, and/or the chromatographic assay exhibits a harringtonines content higher than 97.5%.
本发明涉及一种新的不对称半合成哈林顿碱及其类似物的通用工艺,这些碱是用于化疗的生物碱。该工艺包括将天然的头孢松与一个酰化化合物直接酯化,该化合物由一个侧链前体构成,其主干和功能化已经完全形成。该发明还涉及以下式子的天然、合成或半合成哈林顿碱及其互变异构体和盐:其中n=2(即哈林顿碱)或n=3(即同型哈林顿碱),其中可能包括对映异构体在内的总杂质含量低于1%,和/或主要杂质含量低于0.9%,和/或色谱测定显示哈林顿碱含量高于97.5%。