Palladium(II) Acetate-Catalyzed Dual C-H Functionalization and C-C Bond Formation: A Domino Reaction for the Synthesis of Functionalized ( E)-Bisindole-2-ones from Diarylbut-2-ynediamides.

A domino reaction of palladium(II)-catalyzed dual C-H functionalization with subsequent intramolecular annulation is presented. This method provides a convenient synthesis of a range of symmetrical and unsymmetrical biologically important ( E)-bisindole-2-ones under extremely mild reaction conditions - room temperature, green oxidant and no additive. The reaction mechanism is elucidated in light of the yield values as well as additional control experiment results. [ABSTRACT FROM AUTHOR]