A novel and facile Zn-mediated intramolecular five-membered cyclization of (beta)-tetraarylporphyrin radicals from (beta)-bromotetraarylporphyrins

A novel and facile method for the Zn-mediated intramolecular cyclization of (beta)-porphyrin radicals has been developed for the convenient and effective construction of newly fused five-membered porphyrin systems from readily available (beta)-bromotetraarylporphyrins.