title: Mechanistic implications of nickel-catalyzed reductive coupling of aldehydes and chiral 1,6-enynes.
abstract: [reaction: see text]. A study of nickel-catalyzed reductive coupling reactions of aldehydes and chiral 1,6-enynes has provided evidence for three distinct mechanistic pathways that govern regioselectivity in this transformation. In the absence of a phosphine additive, high regioselectivity and high diastereoselectivity are obtained as a direct result of coordination of both the alkyne and the olefin to the metal center during the C-C bond-forming step.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: Ryan M
authors.initials: RM
authors.lastname: Moslin
authors.forename: Timothy F
authors.initials: TF
authors.lastname: Jamison
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D013237:Stereoisomerism
chemical_list: D000447:Aldehydes; D000480:Alkynes; D009532:Nickel