Porphyrins

Ponomarev, G. V.; Suboch, V. P.; Lyashko, A. N.

doi:10.1007/bf00481136

Cited by 1 publication

(2 citation statements)

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“…mesosubstituent elimination occurs in the ion source of mass spectrometer with intermolecular hydrogen addition. [41] He found that all spectra contained ions [M -NR] + and [M -RNH 2 ] + , and the intensity of the latter was maximal. H. Budzikiewicz encountered a similar problem during the study of a large number of mass spectra of porphyrins and chlorins.…”

Section: Introductionmentioning

confidence: 99%

“…The first substantial study of the mass spectra of the Schiff bases of mesoformylporphyrins was held by G. Ponomarev. [41] He found that all spectra contained ions [M -NR] + and [M -RNH 2 ] + , and the intensity of the latter was maximal. Since it was hard to imagine that the molecular ion of the Schiff base disintegrated loosing amine residue with the simultaneous transfer of two hydrogen atoms from the porphyrin cycle to the amine nitrogen atom, intramolecular rearrangements were suggested to occur in two stages.…”

Section: Introductionmentioning

confidence: 99%

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Transformations of meso‐Iminofunctionalized Pd(II) and Ni(II)‐Complexes of β‐Alkylsubstituted Porphyrins

et al. 2019

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The meso‐imino derivatives of the palladium (II) and nickel (II) complexes of coproporphyrins I and II and β‐octaethylporphyrin were obtained by the Vilsmeier formylation followed by interaction with amines. The metal complexes of the azomethines obtained were transformed to the corresponding complexes of cyclopentane and cyclopentane‐pyrrolidone fused porphyrin derivatives by thermolysis. The plausible mechanism of such transformations was suggested and substantiated with quantum chemical calculations. Meso‐cyano‐, meso‐hydroxy‐, and meso‐aminocarbonyl derivatives of β‐octaethylporphyrin were obtained by treatment of the corresponding meso‐imino derivatives with bases. Demetalation of the nickel complex of the meso‐ hydroxy‐β‐octaethylporphyrin led to formation of the free base derivative. The structures of new types of the porphyrin derivatives were determined via X‐ray powder diffraction analysis. The obtained types of porphyrins are promising candidates to use as photosensitizers in medicine applications due to their longer wave absorption combined with high stability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%