title: Negatively Charged π-Electronic Systems by Deprotonation of Hydroxy-Substituted Dipyrrolyldiketone Boron Complexes.
abstract: Boron complexes of meso-hydroxy-substituted dipyrrolyldiketones, as the precursors of negatively charged π-electronic systems, were synthesized via the oxidative introduction of an acetoxy unit at the meso position of dipyrrolyldiketones and subsequent hydrolysis. The anionic site formed upon deprotonation was moderately stabilized by hydrogen-bond-donating pyrrole NH, generating non-complexing anionic species.
authors.affiliation: Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan.
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Sasano
authors.affiliation: Research and Utilization Division, Japan Synchrotron Radiation Research Institute, Sayo, 679-5198, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Yasuda
authors.affiliation: Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan.
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Maeda
keywords: boron; hydrogen bonding; ion pairs; pi-electronic molecules; pyrrole derivatives