Journal of the American Chemical Society, Vol.130, No.48, 16158-16158, 2008
Synthesis of Condensed Pyrroloindoles via Pd-Catalyzed Intramolecular C-H Bond Functionalization of Pyrroles
A new strategy for the synthesis of condensed hetero- or carbocycles such as pyrroloindoles or fluorenes has been developed that involves the Pd-catalyzed cyclization of readily available N-(2-halobenzyl)pyrroles or their phenyl derivatives. The reaction is proposed to proceed via oxidative addition of benzylic halides to Pd(0) followed by base-assisted C-H bond activation. A broad range of condensed cyclic products could be obtained in good to excellent yields under mild conditions.