INCREASING THE ?-ELECTRON CONJUGATION OF CORROLES VIA SONOGASHIRA-CROSS-COUPLING
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The synthesis of meso-substituted A2B and A3-corroles with small aromatic side chains is standard today. In contrast to this, synthesis of meso-functionalized alkynylcorroles is not state of the art. We report the chemical synthesis and characterization of several A2B and A3-Corroles bearing TIPS-protected ethynyl-groups at the meso-positions, which serve as precursors for further reactions to enhance the ?-electron conjugation. ViaSonogashira-cross-coupling the reaction of several aryliodides with the corroles was accomplished under ambient conditions and a common catalyst system within several hours.