Method of preparing taxane derivatives of general formula (I) by esterification of protected baccatine III or 10-deacetyl-baccatine III by means of an acid of general formula (VII), deprotection of the side chain and elimination of the hydroxy function protection groupings. In general formulae (I) and (VII): Ar stands for aryl, R is hydrogen or acetyl, R.sub.1 is benzoyl or R.sub.2 --O--CO-- in which R.sub.2 is alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, phenyl or heterocyclyl, and R.sub.3 is hydrogen, alkoxy, optionally substituted aryl. ##STR1##
                            通过使用一般式(VII)的酸酯化保护的Baccatine III或10-去乙酰基Baccatine III的方法,去保护侧链并消除羟基保护基团,制备一般式(I)的
紫杉醇衍
生物。在一般式(I)和(VII)中:Ar代表芳基,R为氢或乙酰基,R.sub.1为苯甲酰基或R.sub.2 -O-CO-,其中R.sub.2为烷基,烯基,炔基,环烷基,环烯基,双环烷基,苯基或杂环基,R.sub.3为氢,烷氧基,可选取代的芳基。##STR1##