An efficient seven-step semisynthetic approach towards non-racemic bifunctional furano-allocolchicinoids,
starting from naturally occurring colchicine is presented. The Pd-catalyzed domino
Sonogashira coupling/5-endo-dig cyclization was employed as the key step. The prepared compounds exhibited substantial
cytotoxicity against T3M4, MiaPaCa-2, Colo-357, and PANC-1 cell lines. The presence
of two functionalities with different reactivity (hydroxyl and amino groups) in the
target molecules allows for an easy conjugation of furano-allocolchicinoids with drug
delivery carriers, and opens promising opportunities for their further exploitation
in the search of therapeutics.
Key words
antitumor agents - tubulin - colchicine - allocolchicinoids - heterocycles