title: A unified approach to quinolizinium cations and related systems by ring-closing metathesis.
abstract: [reaction: see text] The first example of an olefin ring-closing metathesis reaction on cationic heteroaromatic systems is described. Dihydroquinolizinium cations and a variety of related cationic systems are synthesized in an efficient approach from N-alkenyl alpha-vinyl azinium salts using Grubbs' catalysts.
authors.affiliation: Departamento de Química Orgánica, Universidad de Alcalá, 28871-Alcalá de Henares, Madrid, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Núñez
authors.forename: Ana M
authors.initials: AM
authors.lastname: Cuadro
authors.forename: Julio
authors.initials: J
authors.lastname: Alvarez-Builla
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Vaquero