title: A new synthetic approach to benzoporphyrins and Kröhnke type porphyrin-2-ylpyridines.
abstract: The reaction of 2-formyl-5,10,15,20-tetraphenylporphyrin with aryl methyl ketones and ammonium acetate, in the presence of La(OTf)(3), affords benzoporphyrins and 2-(2,6-diarylpyridin-4-yl)porphyrins. This methodology was used to prepare, for the first time, a 2-(2,2':6',2''-terpyridin-4'-yl)porphyrin. The structures of two 2-(2,6-diarylpyridin-4-yl)porphyrins were confirmed by single-crystal X-ray diffraction.
authors.affiliation: Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
authors.forename: Nuno M M
authors.initials: NM
authors.lastname: Moura
authors.forename: Maria A F
authors.initials: MA
authors.lastname: Faustino
authors.forename: Maria G P M S
authors.initials: MG
authors.lastname: Neves
authors.forename: Filipe A Almeida
authors.initials: FA
authors.lastname: Paz
authors.forename: Artur M S
authors.initials: AM
authors.lastname: Silva
authors.forename: Augusto C
authors.initials: AC
authors.lastname: Tomé
authors.forename: José A S
authors.initials: JA
authors.lastname: Cavaleiro
mesh_terms: D000085:Acetates / Q000737:chemistry; D018360:Crystallography, X-Ray; D007659:Ketones / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D011166:Porphyrins / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000085:Acetates; D007659:Ketones; D011166:Porphyrins; C018824:ammonium acetate