title: Neo-fused hexaphyrin: a molecular puzzle containing an N-linked pentaphyrin.
abstract: The first neo-confused hexaphyrin(1.1.1.1.1.0) was synthesized by oxidative ring closure of a hexapyrrane bearing two terminal "confused" pyrroles. The new compound displays a folded conformation with a short interpyrrolic C⋅⋅⋅N distance of 3.102 Å, and thus it readily underwent ring fusion to afford a neo-fused hexaphyrin with an unprecedented 5,5,5,7-tetracyclic ring structure. Furthermore, coordination of Cu(II) triggered a ring opening/contracting reaction to afford a Cu(II) complex of an N-linked pentaphyrin derivative. The roles of reactive N-C bonds in the porphyrinoid macrocycles were demonstrated.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237 (P. R. China).
authors.forename: Pingchun
authors.initials: P
authors.lastname: Wei
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Deying
authors.initials: D
authors.lastname: Meng
authors.forename: Hans
authors.initials: H
authors.lastname: Ågren
authors.forename: Zhongping
authors.initials: Z
authors.lastname: Ou
authors.forename: Seikweng
authors.initials: S
authors.lastname: Ng
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Furuta
authors.forename: Yongshu
authors.initials: Y
authors.lastname: Xie
mesh_terms: D015394:Molecular Structure; D010084:Oxidation-Reduction; D011166:Porphyrins / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D011166:Porphyrins
keywords: fused-ring systems; hexaphyrins; macrocycles; pentaphyrins; porphyrinoids