title: Synthesis of azobenzenes from quinone acetals and arylhydrazines.
abstract: Direct reaction between quinone bisacetals and arylhydrazines gives azobenzenes. The presence of catalytic amounts of cerium ammonium nitrate strongly accelerates the reaction. When the bisacetal has a substituent at the 2,5-cyclohexadiene framework, only one regioisomer is formed. The method represents a simple, mild, and novel synthetic access to differently substituted azocompounds in high to excellent yield.
authors.affiliation: Departamento de Química Orgánica (C-I), Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain. carmen.carrenno@uam.es
authors.forename: M Carmen
authors.initials: MC
authors.lastname: Carreño
authors.forename: Gerardo Fernández
authors.initials: GF
authors.lastname: Mudarra
authors.forename: Estíbaliz
authors.initials: E
authors.lastname: Merino
authors.forename: María
authors.initials: M
authors.lastname: Ribagorda