title: Application of a diphosphinidenecyclobutene ligand in the solvent-free copper-catalysed amination reactions of aryl halides.
abstract: 1,2-Diphenyl-3,4-bis[(2,4,6-tri-tert-butylphenyl)phosphinidene]cyclobutene was used as an additive ligand in copper-catalysed amination reactions of halobenzenes with amines in the presence of base to afford the corresponding secondary or tertiary amines in good to excellent yields.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan.
authors.forename: Anil S
authors.initials: AS
authors.lastname: Gajare
authors.forename: Kozo
authors.initials: K
authors.lastname: Toyota
authors.forename: Masaaki
authors.initials: M
authors.lastname: Yoshifuji
authors.forename: Fumiyuki
authors.initials: F
authors.lastname: Ozawa