title: Catalytic hydroamination of alkynes and norbornene with neutral and cationic tantalum imido complexes.
abstract: [reaction: see text] Several tantalum imido complexes have been synthesized and shown to efficiently catalyze the hydroamination of internal and terminal alkynes. An unusual hydroamination/hydroarylation reaction of norbornene catalyzed by a highly electrophilic cationic tantalum imido complex is also reported. Factors affecting catalyst activity and selectivity are discussed along with mechanistic insights gained from stoichiometric reactions.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, USA.
authors.forename: Laura L
authors.initials: LL
authors.lastname: Anderson
authors.forename: John
authors.initials: J
authors.lastname: Arnold
authors.forename: Robert G
authors.initials: RG
authors.lastname: Bergman
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D000586:Amination; D002384:Catalysis; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009636:Norbornanes / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D013635:Tantalum / Q000737:chemistry*
chemical_list: D000480:Alkynes; D007202:Indicators and Reagents; D009636:Norbornanes; D009942:Organometallic Compounds; D013635:Tantalum