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Conjugated macrocycles related to the porphyrins. Part 2 . Further synthetic and spectroscopic studies on difuryl analogs of the oxophlorins
Author(s) -
Lash Timothy D.,
Armiger Yoek Lin SeeTow
Publication year - 1991
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570280421
Subject(s) - chemistry , tautomer , enol , stereochemistry , conjugated system , keto–enol tautomerism , combinatorial chemistry , organic chemistry , polymer , catalysis
The synthesis of three difuryl analogs of the oxophlorins is described. In common with the tetrapyrrolic oxophlorins, these compounds favor the keto tautomers and little, if any, of the enol tautomers are present in neutral solutions. Unlike the tetrapyrrolic systems, the difuryl oxophlorins give well resolved nmr spectra. Attempts to extend these studies to the synthesis of dithienyl oxophlorin analogs were unsuccessful.