title: Intramolecular ketenimine-ketenimine [2 + 2] and [4 + 2] cycloadditions.
abstract: Bis(ketenimines), in which the two heterocumulenic functions are placed in close proximity on a carbon skeleton to allow their mutual interaction, show a rich and not easily predictable chemistry. Intramolecular [2 + 2] or [4 + 2] cycloadditions are, respectively, observed when both ketenimine functions are supported on either ortho-benzylic or 2,2'-biphenylenic scaffolds. In addition, nitrogen-to-carbon [1,3] and [1,5] shifts of arylmethyl groups in N-arylmethyl-C,C-diphenyl ketenimines are also disclosed.
authors.affiliation: Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain. alajarin@um.es
authors.forename: Mateo
authors.initials: M
authors.lastname: Alajarín
authors.forename: Baltasar
authors.initials: B
authors.lastname: Bonillo
authors.forename: Pilar
authors.initials: P
authors.lastname: Sanchez-Andrada
authors.forename: Angel
authors.initials: A
authors.lastname: Vidal
authors.forename: Delia
authors.initials: D
authors.lastname: Bautista