Paclitaxel analogs modified in ring C: Synthesis and biological evaluation

Article abstract of DOI:10.1016/S0040-4020(97)00074-4

Lead tetracetate oxidation of 6α-hydroxy-7-epi-paclitaxel lends to C-nor-paclitaxel and C-seco-paclitaxel derivatives. Tetrpropylammonium perruthnate (TPAP) oxidation of a 6α-hydroxy-7-epi-paclitaxel derivative leads to a 6-formyl-C-nor-paclitaxel derivative. Reaction of a 6α-O-trifluoromethanesulfonyl-7-epi-paclitaxel derivative with DMAP yields a 20-O-acetyl-4-deacetyl-5,6-dehydro-6-formyl-C-nor-paclitaxel derivative. C-nor-paclitaxel analogs are less active than paclitaxel.