Bottom-Up Synthesis of Multiply Fused Pd^II Anthriporphyrinoids

Abstract

Anthriporphyrinoid and its dimeric homologues were synthesized by Suzuki−Miyaura coupling and subsequent oxidation. Both porphyrinoids were smoothly converted to their Pd II complexes and were further decorated by Suzuki− Miyaura coupling with thiophene derivatives and subsequent oxidative fusion reaction to provide multiply fused compounds. Most Pd II anthriporphyrinoids have been structurally well characterized to be planar for monomeric and helically twisted for dimeric species. The dimeric anthriporphyrinoids show paratropic ring currents due to their global antiaromatic networks, the extent of which increases with an increase of conjugated network. Multiply fused dimeric anthriporphyrinoids show helical structures, fully reversible six redox potentials, small HOMO−LUMO gaps, and absorption tails reaching in the near-infrared region, suggesting the high potential of this approach to explore molecular graphene. Optical separations of the dimeric helical species were accomplished, and racemization barrier heights were determined.

Copper(II) Carbaporphyrins: Oxygenation Reactivities Dependent upon Coordinating Structures

“…Experimental procedures, MALDI-TOF-MS, adsorption, and 1 H and 13 C NMR spectra, cyclic voltammograms, Xray crystal structures and detailed structures, and tables of crystal data and structure refinement for all compounds (PDF)…”

“…In recent years, we have developed carbaporphyrins 1 , 2 , 3 , and 4 in the course of our own project of earring porphyrins as novel porphyrinoids that exhibit characteristic electronic and structural attributes as well as coordination abilities of transition metals (Scheme ). In this paper, we report Cu II metalation of carbaporphyrins 1 – 4 with a particular focus on oxygenation of the inner C atoms.…”