Novel camptothecin derivatives having antitumor activity, the processes for the preparation thereof, the use thereof as antitumor drugs and pharmaceutical compositions containing them.
Pd-catalyzed S N2 displacement from phenols toward bench-stable, aryl-iodide–containing glycosyl sulfides. The key Pd(II) oxidative addition intermediate diverges from an arylating agent (Csp 2 electrophile) to a glycosylating agent (Csp 3 electrophile). This method inherits many merits of cross-coupling reactions, including operational simplicity and functional group tolerance. It preserves the S N2 mechanism