title: Ammonium catalyzed cyclitive additions: evidence for a cation-π interaction with alkynes.
abstract: The addition of carbamate nitrogen to a non-conjugated carbon-carbon triple bond is catalyzed by an ammonium salt leading to a cyclic product. Studies in homogeneous systems suggest that the ammonium agent facilitates nitrogen-carbon bond formation through a cation-π interaction with the alkyne unit that, for the first time, is directly observed by Raman spectroscopy.
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. slepore@fau.edu.
authors.forename: Edith
authors.initials: E
authors.lastname: Nagy
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. slepore@fau.edu.
authors.forename: Elijah
authors.initials: E
authors.lastname: St Germain
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. slepore@fau.edu.
authors.forename: Patrick
authors.initials: P
authors.lastname: Cosme
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. slepore@fau.edu.
authors.forename: Pradip
authors.initials: P
authors.lastname: Maity
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. slepore@fau.edu.
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Terentis
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, FL 33431-0991, USA. slepore@fau.edu.
authors.forename: Salvatore D
authors.initials: SD
authors.lastname: Lepore
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D064751:Ammonium Compounds / Q000737:chemistry*; D002384:Catalysis; D002412:Cations; D003500:Cyclization; D013059:Spectrum Analysis, Raman / Q000379:methods
chemical_list: D000480:Alkynes; D064751:Ammonium Compounds; D002412:Cations