title: New synthetic route to substituted dihydroazulene photoswitches.
abstract: A new procedure for functionalization of the dihydroazulene photoswitch on its seven-membered ring was developed, which has allowed isolation of the first dihydroazulene with a phenyl substituent at position 5 from a mixture of regioisomers. Light-induced ring-opening to the corresponding vinylheptafulvene and the thermal back-reaction was studied in detail.
authors.affiliation: Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
authors.forename: Louise
authors.initials: L
authors.lastname: Skov
authors.forename: Michael Åxman
authors.initials: MÅ
authors.lastname: Petersen
authors.forename: Søren Lindbæk
authors.initials: SL
authors.lastname: Broman
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Bond
authors.forename: Mogens Brøndsted
authors.initials: MB
authors.lastname: Nielsen
mesh_terms: D052176:Azulenes / Q000138:chemical synthesis* / Q000737:chemistry; D060326:Chemistry Techniques, Synthetic / Q000379:methods*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D052176:Azulenes; C507545:dihydroazulene