title: Catalytic dehydrocoupling of amines and boranes by an incipient tin(ii) hydride.
abstract: The facile heterodehydrocoupling of a range of primary or secondary amines and even ammonia with pinacolborane (HBPin) was accomplished using {ArMe6Sn(μ-OMe)}2(1, ArMe6= C6H3-2,6-(C6H2-2,4,6-Me3)2) as pre-catalysts for a catalytically active tin(ii) hydride. The more sterically hindered pre-catalyst 2, {AriPr4Sn(μ-OMe)}2(AriPr4= C6H3-2,6-(C6H3-2,6-iPr2)2) facilitated the dehydrocoupling only of primary amines with HBPin, and at an increased rate relative to the less crowded {ArMe6Sn(μ-OMe)}2. Also presented is {ArMe6Sn(μ-NEt2)}2(3), which can be converted into the structurally characterizable {ArMe6Sn(μ-NEt2)(μ-H)SnArMe6} (4) via the addition of pinacol borane. This, alongside stoichiometric studies, give insight into the mechanism of the catalysis.
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA. pppower@ucdavis.edu.
authors.forename: Jeremy D
authors.initials: JD
authors.lastname: Erickson
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA. pppower@ucdavis.edu.
authors.forename: Ting Yi
authors.initials: TY
authors.lastname: Lai
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA. pppower@ucdavis.edu.
authors.forename: David J
authors.initials: DJ
authors.lastname: Liptrot
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA. pppower@ucdavis.edu.
authors.forename: Marilyn M
authors.initials: MM
authors.lastname: Olmstead
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA. pppower@ucdavis.edu.
authors.forename: Philip P
authors.initials: PP
authors.lastname: Power