- Regioselective bromination of palladium tetraphenyltetrabenzoporphyrin to benzo-rings. Synthesis of mono- and octabromotetrabenzoporphyrins and their properties
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Bromination of palladium meso-tetraphenyl tetrabenzoporphyrin (Pd Ph 4TBP, 1) by Me4NBr3 or Me4NBr/ Br2 was shown to proceed regioselectively to the benzo-rings annelated to main porphyrin macrocycle.
- Chumakov, Denis,Moiseeva, Anna,Anisimov, Alexander,Uzhinov, Boris,Khoroshutin, Andrey
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- Regioselective bromination of (Tetraphenyltetrabenzoporphyrinato) palladium(II). Synthesis of a new octabromo derivative of the tetraphenyltetrabenzoporphyrin series
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Bromination of (meso-tetraphenyltetrabenzoporphyrinato)palladium(II) with bromine in the presence of tetramethylammonium bromide occurs exclusively at the benzene rings fused to the porphyrin system while the phenyl rings in the meso positions are not involved. The corresponding octabromo-substituted complex was obtained using a large excess of bromine on prolonged reaction time. The complex was isolated and characterized by 1H NMR spectra, electronic absorption spectra in the UV and visible regions, and MALDI-TOF mass spectra. It was assigned the structure of symmetric (22,23,72,73,122,123,172,173-octabromo- 5,10,15,20-tetraphenyltetrabenzoporphyrinato)palladium(II).
- Khoroshutin,Chumakov,Anisimov,Kobrakov
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p. 1959 - 1964
(2008/09/17)
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