100619-73-6Relevant articles and documents
Syntheses of per-15N labeled etioporphyrins I-IV and a related tetrahydrobenzoporphyrin for applications in organic geochemistry and vibrational spectroscopy
Lash, Timothy D.,Chen, Shaohua
, p. 11577 - 11600 (2007/10/03)
Nitrogen-15 labeled pyrroles have been prepared from commercially available 15N glycine or sodium nitrite using the Barton-Zard, Knorr, and Kleinspehn approaches. These pyrroles were used as intermediates in the synthesis of per-15N labeled porphyrins needed for the analysis and assignment of vibrational spectra for sedimentary porphyrins. Etioporphyrin-I was prepared via pyrromethene intermediates, while etioporphyrins II-V and a related tetrahydrobenzoporphyrin were synthesized via stepwise routes involving the copper(II) mediated cyclization of a,c-biladienes as the key step. Detailed analyses of both the proton and carbon-13 NMR spectra provide nitrogen-15 coupling constants for these important structures.
Thermochemistry of Solution of Linear Pyrroles
Berezin, M. B.,Semeikin, A. S.,V'yugin, A. I.
, p. 1265 - 1268 (2007/10/03)
The enthalpies of solution of a series of symmetrically substituted linear pyrroles in benzene, tetrachloromethane, chloroform, dimethylformamide, and pyridine were measured calorimetrically at 298 K.The effect of substituents in pyrrole molecules on the energy characteristics of their solvation by organic solvents is discussed.
