Syntheses of per-15N labeled etioporphyrins I–IV and a related tetrahydrobenzoporphyrin for applications in organic geochemistry and vibrational spectroscopy
作者:Timothy D. Lash、Shaohua Chen
DOI:10.1016/j.tet.2005.09.105
日期:2005.12
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-13NMRspectra provide nitrogen-15 coupling