title: Pronounced effects of substituents on the iridium-catalyzed borylation of aryl C-H bonds.
abstract: Iridium trisboryl complexes containing bisphosphine and bipyridine ligands and pinacolate and catecholate substituents on boron are reported. A large difference in reactivity towards the borylation of C-H bonds is observed for this series of trisboryl complexes, and this difference is attributed to the electron-donating properties of the pinacolate vs. catecholate groups, and the steric and electronic properties of bipyridine vs. bisphosphine ligands.
authors.affiliation: Department of Chemistry, University of Illinois, 600 South Mathews Av, Urbana, IL 61801, USA.
authors.forename: Carl W
authors.initials: CW
authors.lastname: Liskey
authors.forename: Carolyn S
authors.initials: CS
authors.lastname: Wei
authors.forename: Dale R
authors.initials: DR
authors.lastname: Pahls
authors.forename: John F
authors.initials: JF
authors.lastname: Hartwig