title: Rh-catalyzed carbonylation of arylzinc compounds yielding symmetrical diaryl ketones by the assistance of oxidizing agents.
abstract: Carbonylative homocoupling of arylzinc compounds 1 using 1 atm of CO and 1,2-dibromoethane as an oxidant was achieved in the presence of Rh-dppf catalyst, affording symmetrical diaryl ketones in good yields. Under similar conditions, Pd or Ni catalysts induced oxidative homocoupling of 1 to yield biaryls instead. The beneficial catalysis by Rh in the carbonylation was presumed to stem from the facility by which the migration of the aryl ligand to CO at the Rh(3+) intermediate occurred.
authors.affiliation: Department of Chemistry, Faculty of Science, Okayama University, Tsushima, Okayama 700-8530, Japan.
authors.forename: Kana
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Yugo
authors.initials: Y
authors.lastname: Nishimura
authors.forename: Fuxing
authors.initials: F
authors.lastname: Gao
authors.forename: Kazuma
authors.initials: K
authors.lastname: Gotoh
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nishihara
authors.forename: Kentaro
authors.initials: K
authors.lastname: Takagi