Author:
Momenteau M.,Mispelter J.,Loock B.,Lhoste J. M.
Abstract
15N-Etioporphyrin I was prepared by polycondensation of 5-hydroxymethylpyrrole-2-carboxylic acid, obtained via the Bullock route. This method gives an isomerically pure porphyrin with a high yield. The labelled compound was analyzed by nmr of the free base, of the dicationic form, and of the zinc complex. The spectrum of the free base shows a rapid tautomerism of the NH protons at 34 °C which disappears at low temperature. All spectra reveal several long-range proton—nitrogen-15 interactions. The electron spin resonance spectrum of the paramagnetic complex of this porphyrin with copper-63 is readily analyzed. This analysis was extended to the spectra of the complexes obtained with natural copper and with nitrogen-14 porphyrins.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
19 articles.
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