title: Well-defined [Rh(NHC)(OH)] complexes enabling the conjugate addition of arylboronic acids to α,β-unsaturated ketones.
abstract: The synthesis and catalytic activity of three well-defined monomeric rhodium(I) hydroxide complexes bearing N-heterocyclic carbene (NHC) ligands are reported. [Rh(cod)(ICy)(OH)] promoted the 1,4-addition of arylboronic acids to cyclic enones, with TONs and TOFs of 100,000 and 6,600 h(-1), respectively, at 0.001 mol% catalyst loadings. Mechanistic studies permitted the isolation of a phenylrhodium intermediate.
authors.affiliation: EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK.
authors.forename: Byron J
authors.initials: BJ
authors.lastname: Truscott
authors.forename: George C
authors.initials: GC
authors.lastname: Fortman
authors.forename: Alexandra M Z
authors.initials: AM
authors.lastname: Slawin
authors.forename: Steven P
authors.initials: SP
authors.lastname: Nolan