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Communication | Regular issue | Vol 20, No. 12, 1983, pp.2343-2346
Published online, 1st January, 1970
DOI: 10.3987/R-1983-12-2343
Synthesis of a Difuryl Analog of the Oxophlorins

Timothy D. Lash and Yanet G. Motta

*Faculty of Chemistry, Northern State College, Aberdeen, South Dakota 57401, U.S.A.


Condensation of 2,2’-bis(5-formylfuryl)methanone with a 2,2’-dipyrrylmethane-5,5’-dicarboxylic acid in trifluoroacetic acid afforded a macrocycle (6) analogous to the oxophlorin (oxyporphyrin) system. IR and UV spectra indicate that this compound exists as the keto tautomer (6) rather than the fully conjugated enol form (7a). (6) did not react with acetic anhydride-pyridine and the enol acetate (7b) could not be isolated, although the diperchlorate salt was formed under acidic conditions.