title: The unusual ring scission of a quinoxaline-pyran-fused dithiolene system related to molybdopterin.
abstract: The reduction of the dithiolene ligand, qpdt2-, a mimic of the biological molybdopterin cofactor, and the corresponding (η5-cyclopentadienyl)cobalt(iii) complex [(qpdt)CoIIICp] was studied. It was found that in both cases an unprecedented ring scission reaction took place in acidic medium. All new reaction products have been spectroscopically and structurally characterized. Plausible mechanisms for the formation of these products were also proposed.
authors.affiliation: Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, UPMC Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France. marc.fontecave@college-de-france.fr yun.xu-li@college-de-france.fr.
authors.forename: Thibault
authors.initials: T
authors.lastname: Fogeron
authors.affiliation: Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Saclay, 1, av.de la Terrasse, 91198 Gif-sur-Yvette, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Retailleau
authors.affiliation: Sorbonne Universités, UPMC Université Paris 6, Institut Parisien de Chimie Moléculaire, UMR 8232 CNRS, 4 place Jussieu, 75252 Paris Cedex 5, France.
authors.forename: Lise-Marie
authors.initials: LM
authors.lastname: Chamoreau
authors.affiliation: Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, UPMC Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France. marc.fontecave@college-de-france.fr yun.xu-li@college-de-france.fr.
authors.forename: Marc
authors.initials: M
authors.lastname: Fontecave
authors.affiliation: Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, UPMC Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France. marc.fontecave@college-de-france.fr yun.xu-li@college-de-france.fr.
authors.forename: Yun
authors.identifier: http://orcid.org/0000-0003-4805-7156
authors.initials: Y
authors.lastname: Li