The influence of aromatic substitution at the 2-benzoyl moiety of pacl
itaxel on biological activity was investigated, following the Topliss
Operational Scheme. Twelve paclitaxel derivatives were synthesized and
evaluated in a microtubule assembly assay and for cytotoxicity agains
t B16 melanoma cells. Most of the analogues were found to possess biol
ogical properties similar to paclitaxel.