Inverted sapphyrin: a new family of doubly N-confused expanded porphyrins.
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.
Sessler
Jonathan L
JL
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
Cho
Dong-Gyu
DG
Stepień
Marcin
M
Lynch
Vincent
V
Waluk
Jacek
J
Yoon
Zin Seok
ZS
Kim
Dongho
D
D018360:Crystallography, X-Ray; D011166:Porphyrins / Q000138:chemical synthesis / Q000737:chemistry*
D011166:Porphyrins; C440448:sapphyrin