Seco-porphyrazines: synthetic, structural, and spectroscopic investigations

摘要

Linstead macrocyclization of dinitrile 1 gave [octakis(dimethylamino)porphyrzazinato]magnesium- (II) 2 and the seco-porphyrazine 4 from adventitious oxidation. The structure of the latter has been unequivocalkly established by an X-ray crystallographic study. Alternatively, compound 4 was obtained in high yield from the manganese dioxid-mediated oxidation of the free base porphyrazine 3. This convenient metho was further extended to core metalated and unsummetricl porphyra- zines.