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meso-Aryl Core-Modified Fused Sapphyrins: Syntheses and Structural Diversity

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journal contribution
posted on 2014-07-03, 00:00 authored by Ganesan Karthik, A. Srinivasan, Tavarekere K. Chandrashekar
Two new, fused core-modified expanded porphyrins, sapphyrins 3 and 4, were synthesized by a simple acid-catalyzed condensation of electron-rich and rigid precursor, dithienothiophene (DTT) diol, and core-modified tripyrrane. These sapphyrins exhibit structural diversity depending upon the heteroatom present in the macrocyclic framework, where the thiophene ring is inverted in 3, while the selenophene ring in 4 exists in normal and inverted form in the free base and addition of two protons shifts the equilibrium to inverted form.

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