Abstract: This invention relates to compounds of the formula (I), preparation thereof, and pharmaceutical compositions containing them: ##STR1## wherein: R.sub.a is hydrogen, hydroxyl, alkoxy, acyloxy, or an alkoxyacetoxy radical; R.sub.b is hydrogen; or R.sub.a and R.sub.b, together with the carbon atom to which they are attached, form a ketone function; Z represents a hydrogen atom or a radical of formula (II): ##STR2## in which: R.sub.1 represents an optionally substituted benzoyl, thenoyl, furoyl, or R.sub.2 --O--CO-- radical where R.sub.2 is an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, or an optionally substituted phenyl or heterocyclic radical; R.sub.3 is an aromatic heterocyclic, alkyl, alkenyl, alkynyl, cycloalkyl, or a phenyl or naphthyl radical; R.sub.4 is alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, aryl, or heterocyclic radical; and R.sup.5 is an optionally substituted cycloalkenyl, alkyl, alkenyl, alkynyl, or cycloalkyl radical.

Abstract: New taxoids of general formula (I), their preparation, and pharmaceutical compounds containing them. ##STR1## In general formula (I), for example, Ar represents an aryl radical,R represents an alkoxyacetyl radical,R.sub.1 represents a benzoyl radical or a radical of formula R.sub.2 --O--CO-- in which R.sub.2 represents an optionally substituted alkyl radical, an alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, phenyl or heterocyclyl radical.The new products of general formula (I) have a remarkable antitumor activity.

Abstract: This invention relates to taxoids of the formula (I): a method for preparing these taxoids, and pharmaceutical compositions containing them. In formula (I), R is alkyl radical (1-6 carbon atoms), alkenyl (2-6 carbon atoms), alkynyl (2-6 carbon atoms), cycloalkyl (3-6 carbon atoms), cycloalkenyl (4-6 carbon atoms), phenyl, unsaturated heterocyclyl containing from 5 to 6 links, Z is a hydrogen atom or a radical of formula (II): ##STR1## wherein R.sub.1 is an optionally substituted benzoyl radical, thenoyl radical, furoyl radical, or a radical R.sub.2 --O--CO-- in which R.sub.2 is an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, optionally substituted phenyl or heterocyclyl, and R.sub.3 is an alkyl, alkenyl, alkynyl, cycloalkyl, phenyl, naphthyl or aromatic heterocyclic radical. The taxoids of formula (I) in which Z is a radical of formula (II) have remarkable antitumoral and antileukemic properties.

Abstract: New taxoids of general formula (I): ##STR1## wherein Z represents a hydrogen atom or a radical of general formula: ##STR2## in which R.sub.1 represents an optionally substituted benzoyl radical, a thenoyl or furoyl radical or a radical R.sub.2 --O--CO-- in which R.sub.2 represents an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl or phenyl radical, optionally substituted, or a heterocyclic radical,R.sub.3 represents an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, phenyl, naphthyl or aromatic heterocyclic radical,either R.sub.4 represents a hydrogen atom,R.sub.6 and R.sub.7 together form a ketone function, andR and R.sub.5 together form a bond,or R.sub.4 represents a hydrogen atom or ahydroxyl radical or an alkoxy, alkenyloxy or alkynyloxy radical, optionally substituted, an alkanoyloxy, aryloxy, alkenoyloxy, alkynoyloxy, cycloalkanoyloxy, alkoxyacetyl, alkylthioacetyl, alkyloxycarbonyloxy, cycloalkyloxy, cycloalkenyloxy, carbamoyloxy, alkylcarbamoyloxy or dialkylcarbamoyloxy radical,R.

Abstract: This invention relates to a process for preparing taxoid derivatives of formulae II and XI: ##STR1## in which Ar represents an aryl radical; R.sub.1 represents a benzoyl radical or a radical R.sub.2 --O--CO-- in which R.sub.2 represents an unsubstituted or substituted alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, phenyl, or saturated or unsaturated heterocyclic radical; R.sub.3 represents an unsubstituted or substituted alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, saturated or unsaturated heterocyclic, or aryl radial, but not a phenyl radical; R.sub.4 represents a hydrogen atom and R.sub.5 represents a hydroxyl-protecting group or R.sub.4 and R.sub.5 together form a heterocyclic group; G.sub.1 represents a hydroxyl-protecting group; and G.sub.

Abstract: This invention relates to a method for the preparation of taxane derivatives having the formula (I) and pharmaceutical compositions which contain the derivatives thus obtained. In formula (I), R is hydrogen or acetyl, R.sub.1 is benzoyl or R.sub.2 --O--CO wherein R.sub.2 is alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, phenyl or heterocyclyl and Het is a 5-membered optionally substituted aromatic heterocycle (thiophene, tiazole, furan, pyrrole, imidazole, oxazole, isoxazole, pyrazole). The products of formula (I) have remarkable antitumor and antileukemia properties.

Abstract: New taxoids of general formula (I), their preparation and pharmaceutical compositions containing them.In general formula (I),Ar represents an aryl radicalR represents a hydrogen atom or an acetyl, alkoxyacetyl or alkyl radical,R.sub.1 represents a benzoyl radical or a radical of formula R.sub.2 --O--CO-- in which R.sub.2 represents an optionally substituted alkyl radical, an alkenyl, alkynyl, cycloalkyl, cycloalkenyl, bicycloalkyl, phenyl or heterocyclyl radicalThe new products of general formula (I) have a remarkable antitumour activity.