title: First synthesis of biquinoliziniun salts: novel example of a chiral azonia dication.
abstract: [Structure: see text] The 1,1'-, 2,2'-, and 3,3'-biquinolizinium dications are described for the first time and were prepared using palladium-catalyzed homocoupling reactions of the corresponding isomeric bromoquinolizinium bromides. Theoretical calculations show 1,1'- and 4,4'-biquinolizinium dications to be chiral molecules, the latter of which has a high energy of formation, a factor that probably precludes its formation.
authors.affiliation: Departamento de Química Orgánica and Departamento de Química Física, Universidad de Alcalá, Madrid, Spain.
authors.forename: Domingo
authors.initials: D
authors.lastname: García-Cuadrado
authors.forename: Ana M
authors.initials: AM
authors.lastname: Cuadro
authors.forename: Julio
authors.initials: J
authors.lastname: Alvarez-Builla
authors.forename: Unai
authors.initials: U
authors.lastname: Sancho
authors.forename: Obis
authors.initials: O
authors.lastname: Castaño
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Vaquero
mesh_terms: D008958:Models, Molecular; D010165:Palladium / Q000737:chemistry; D011799:Quinazolines / Q000138:chemical synthesis*; D012492:Salts; D013237:Stereoisomerism
chemical_list: D011799:Quinazolines; D012492:Salts; D010165:Palladium