title: [4 + 2] Cycloaddition reaction of C-aryl ketenimines with PTAD as a synthetic equivalent of dinitrogen. Synthesis of triazolocinnolines and cinnolines.
abstract: C,C,N-Triaryl ketenimines and C-alkyl-C,N-diaryl ketenimines react with 2 equiv of PTAD to provide 1,2,4-triazolo[1,2-a]cinnolines with a pendant triazolidindione group by means of a Diels-Alder/ene sequence. The treatment of such adducts with potassium hydroxide affords 3-aminocinnolines.
authors.affiliation: Departamento de Quimica Organica, Facultad de Quimica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain. alajarin@um.es
authors.forename: Mateo
authors.initials: M
authors.lastname: Alajarin
authors.forename: Baltasar
authors.initials: B
authors.lastname: Bonillo
authors.forename: Marta
authors.initials: M
authors.lastname: Marin-Luna
authors.forename: Angel
authors.initials: A
authors.lastname: Vidal
authors.forename: Raul-Angel
authors.initials: RA
authors.lastname: Orenes