申请人:Rhone-Poulenc Rorer, S.A.
公开号:US05686623A1
公开(公告)日:1997-11-11
A method for preparing taxane derivatives of general formula (I) by esterifying protected baccatin III or protected 10-deacetyl baccatin III with an acid of general formula (II). In general formulae (I) and (II), Ar is an aryl radical; R.sub.1 and R.sub.2 which are the same or different, are a hydrogen atom, an alkyl, phenylalkyl, phenyl, alkoxyphenyl or dialkoxyphenyl radical, or R.sub.1 or R.sub.2, together with the carbon atom to which they are attached, form a 4-7 membered ring; R.sub.3 is an acetyl radical or a hydroxy function protective grouping, and R.sub.4 is a hydroxy function protective grouping; R is a phenyl radical or a radical of formula R.sub.5 --O-- wherein R.sub.5 -- is an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, phenyl or saturated or unsaturated nitrogenous heterocylcyl radical. The products of general formula (I) are particularly useful for preparing taxol, Taxotere and analogues thereof having remarkable antitumor properties. ##STR1##
一种通过酯化保护的红豆杉三醇或保护的10-去乙酰红豆杉三醇与一般式(II)的酸反应制备一般式(I)的紫杉醇衍生物的方法。在一般式(I)和(II)中,Ar是芳基基团;R.sub.1和R.sub.2相同或不同,是氢原子,烷基,苯基烷基,苯基,烷氧基苯基或双烷氧基苯基基团,或者R.sub.1或R.sub.2与它们连接的碳原子一起形成4-7成员环;R.sub.3是乙酰基或羟基保护基团,R.sub.4是羟基保护基团;R是苯基或公式R.sub.5 --O--中的基团,其中R.sub.5--是烷基,烯基,炔基,环烷基,环烯基,苯基或饱和或不饱和的含氮杂环基团。一般式(I)的产物特别适用于制备具有显著抗肿瘤性质的紫杉醇、紫杉醇和类似物。