title: Inverted sapphyrin: a new family of doubly N-confused expanded porphyrins.
abstract: The synthesis of an inverted, methoxylated sapphyrin derivative is described. This system, wherein inversion of pyrrolic nitrogen atoms is configurationally enforced via the use of a 3,3'-bipyrrolic precursor, displays what is best described as "weak aromaticity" as judged from its spectroscopic features and supporting theoretical calculations.
authors.affiliation: Department of Chemistry and Biochemistry and Institute for Cellular and Molecular Biology, 1 University Station A5300, The University of Texas at Austin, Austin, TX 78712-0156, USA. sessler@mail.utexas.edu
authors.forename: Jonathan L
authors.initials: JL
authors.lastname: Sessler
authors.forename: Dong-Gyu
authors.initials: DG
authors.lastname: Cho
authors.forename: Marcin
authors.initials: M
authors.lastname: Stepień
authors.forename: Vincent
authors.initials: V
authors.lastname: Lynch
authors.forename: Jacek
authors.initials: J
authors.lastname: Waluk
authors.forename: Zin Seok
authors.initials: ZS
authors.lastname: Yoon
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
mesh_terms: D018360:Crystallography, X-Ray; D011166:Porphyrins / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D011166:Porphyrins; C440448:sapphyrin