title: Modular Attachment of Appended Boron Lewis Acids to a Ruthenium Pincer Catalyst: Metal-Ligand Cooperativity Enables Selective Alkyne Hydrogenation.
abstract: A new series of bifunctional Ru complexes with pendent Lewis acidic boranes were prepared by late-stage modification of an active hydrogen-transfer catalyst. The appended boranes modulate the reactivity of a metal hydride as well as catalytic hydrogenations. After installing acidic auxiliary groups, the complexes become multifunctional and catalyze the cis-selective hydrogenation of alkynes with higher rates, conversions, and selectivities compared with the unmodified catalyst.
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Kuei-Nin T
authors.initials: KN
authors.lastname: Tseng
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Jeff W
authors.initials: JW
authors.lastname: Kampf
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Nathaniel K
authors.initials: NK
authors.lastname: Szymczak