title: Z-Selective Copper(I)-Catalyzed Alkyne Semihydrogenation with Tethered Cu-Alkoxide Complexes.
abstract: A highly stereoselective alkyne semihydrogenation with copper(I) complexes is reported. Copper-N-heterocyclic carbene complex catalysts, bearing an intramolecular Cu-O bond, allow for the direct transfer of both hydrogen atoms from dihydrogen to the alkyne. The corresponding alkenes can be isolated with high Z selectivity and negligible overreduction to the alkane.
authors.affiliation: Institut für Chemie, Technische Universtität Berlin, Straße des 17. Juni 115, 10623 Berlin (Germany).
authors.forename: Felix
authors.initials: F
authors.lastname: Pape
authors.affiliation: Institut für Chemie, Technische Universtität Berlin, Straße des 17. Juni 115, 10623 Berlin (Germany).
authors.forename: Niklas O
authors.initials: NO
authors.lastname: Thiel
authors.affiliation: Institut für Chemie, Technische Universtität Berlin, Straße des 17. Juni 115, 10623 Berlin (Germany). johannes.teichert@chem.tu-berlin.de.
authors.forename: Johannes F
authors.initials: JF
authors.lastname: Teichert
keywords: alkynes; copper; homogeneous catalysis; hydrogenation; stereoselectivity