| Abstract
| - The novel five- and seven-membered ring appended aminoporphyrazines 3 and 12 have beenprepared via mixed Linstead macrocyclization. The structures of both have been unequivocallyestablished by X-ray crystallographic studies. Reductive deselenation of selenadiazole 3 in thepresence of 9,10-phenanthrenequinone or 2,3-butanedione results in the formation of pyrazines6a,b, whereas oxidation of porphyrazine 12 gave the corresponding seco derivative 14. seco-Porphyrazine 14 mediates the generation of singlet oxygen with a quantum yield of 0.74.
|
