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The synthesis, electronic absorption and 1 H NMR spectra of a suite of novel porphyrinoids derived from meso-bromoporphyrins by palladium-catalysed aminations using ethyl and tert-butylcarbazates are reported. Instead of the expected carbazate-substituted porphyrins, a facile oxidative dearomatisation of the porphyrin ring occurs in high yield, especially for the nickel(II) complexes, resulting...
Novel porphyrinoids with interrupted conjugation (di-iminoporphodimethenes) result from the Pd-catalyzed coupling of meso-bromo porphyrins and their metal complexes with carbazates and hydrazones, followed by aerial oxidation. X-ray crystallography revealed a saddle shape for molecules of the nickel(II) complex of a di-iminoporphodimethene.
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