Synthesis and Characterization of a Stable Smaragdyrin Isomer

Abstract

The synthesis of 16,20-dipropyl-2,3,6,7,10,11,15,21-octamethyl-[22]pentaphyrin-(1.1.1.0.0) (8), a stable isomer of smaragdyrin ([22]pentaphyrin(1.1.0.1.0)), and 9, a furan-containing analogue of 8, are reported. These two new expanded porphyrins were characterized in solution using UV-vis and (1)H and (13)C NMR spectroscopic means and in the solid state via single-crystal X-ray diffraction analysis.