title: Nickel promoted functionalization of CO2 to anhydrides and ketoacids.
abstract: The reductive functionalization of carbon dioxide into high value organics was accomplished via the coupling with carbon monoxide and ethylene/propylene at a zerovalent nickel species bearing the 2-((di-t-butylphosphino)methyl)pyridine ligand (PN). An initial oxidative coupling between carbon dioxide, olefin, and (PN)Ni(1,5-cyclooctadiene) afforded five-membered nickelacycle lactone species, which were produced with regioselective 1,2-coupling in the case of propylene. The propylene derived nickelacycle lactone was isolated and characterized by X-ray diffraction. Addition of carbon monoxide, or a combination of carbon monoxide and diethyl zinc to the nickelacycle lactone complexes afforded cyclic anhydrides and 1,4-ketoacids, respectively, in moderate to high yields. The primary organometallic product of the transformation was zerovalent (PN)Ni(CO)2.
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912, USA. wb36@brown.edu.
authors.forename: Zoe R
authors.initials: ZR
authors.lastname: Greenburg
authors.forename: Dong
authors.initials: D
authors.lastname: Jin
authors.forename: Paul
authors.initials: P
authors.lastname: G Williard
authors.forename: Wesley H
authors.initials: WH
authors.lastname: Bernskoetter