title: Synthesis and reactions of aminoporphyrazines with annulated five- and seven-membered rings.
abstract: The novel five- and seven-membered ring appended aminoporphyrazines 3 and 12 have been prepared via mixed Linstead macrocyclization. The structures of both have been unequivocally established by X-ray crystallographic studies. Reductive deselenation of selenadiazole 3 in the presence of 9,10-phenanthrenequinone or 2,3-butanedione results in the formation of pyrazines 6a,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.
authors.affiliation: Department of Chemistry, Imperial College of Science, Technology and Medicine, South Kensington, London SW7 2AY, UK.
authors.forename: Sven M
authors.initials: SM
authors.lastname: Baum
authors.forename: Andrés A
authors.initials: AA
authors.lastname: Trabanco
authors.forename: Antonio Garrido
authors.initials: AG
authors.lastname: Montalban
authors.forename: Aaron S
authors.initials: AS
authors.lastname: Micallef
authors.forename: Chang
authors.initials: C
authors.lastname: Zhong
authors.forename: Hubert G
authors.initials: HG
authors.lastname: Meunier
authors.forename: Klaus
authors.initials: K
authors.lastname: Suhling
authors.forename: David
authors.initials: D
authors.lastname: Phillips
authors.forename: Andrew J P
authors.initials: AJ
authors.lastname: White
authors.forename: David J
authors.initials: DJ
authors.lastname: Williams
authors.forename: Anthony G M
authors.initials: AG
authors.lastname: Barrett
authors.forename: Brian M
authors.initials: BM
authors.lastname: Hoffman