Novel hydrazide containing taxane conjugates

C - Chemistry – Metallurgy – 07 – D

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C07D 305/14 (2006.01)

Patent

CA 2716925

The present invention relates to compounds of formula I or salts thereof, wherein, R1 is selected from the group consisting of hydrogen and R4; R2 is selected from the group consisting of hydrogen, acetyl and R4; R3 is selected from the group consisting of alkyl, -O-alkyl,-NH-alkyl, aryl and heterocyclyl; R4 represents a moiety (A) wherein, X is selected from the group consisting of a single bond, alkylene, alkenylene, alkynylene, arylene or a heterocyclylene moiety; R5 and R6 are same or different and are independently selected from hydrogen, alkyl, aryl or heterocyclyl; or R5 and R6 may form together with the nitrogen atom to which they are attached a heterocyclyl ring system.

La présente invention concerne des composés de formule I ou leurs sels, dans laquelle R1 est choisi dans le groupe constitué par hydrogène et R4; R2 est choisi dans le groupe constitué par hydrogène, acétyle et R4; R3 est choisi dans le groupe constitué par alkyle, -O-alkyle,-NH-alkyle, aryle et hétérocyclyle; R4 représente une fraction (A), dans laquelle X est choisi dans le groupe constitué par une simple liaison, une fraction alkylène, alcénylène, alcynylène, arylène ou hétérocyclylène; R5 et R6 sont identiques ou différents et sont choisis indépendamment parmi hydrogène, alkyle, aryle ou hétérocyclyle; ou R5 et R6 peuvent former ensemble avec l'atome d'azote auquel ils sont attachés un système cyclique hétérocyclyle.

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