title: Lewis acid catalyzed reaction of arylvinylidenecyclopropanes with acetals: a facile synthetic protocol for the preparation of indene derivatives.
abstract: [Structure: see text] A number of highly substituted indene derivatives have been prepared in good yields by the reactions of arylvinylidenecyclopropanes 1 with acetals 2 in the presence of Lewis acid under mild conditions. The reaction is believed to proceed via regioselective addition of oxonium intermediate to arylvinylidenecyclopropane and the subsequent intramolecular Friedel-Crafts reaction.
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai, China 200032.
authors.forename: Jian-Mei
authors.initials: JM
authors.lastname: Lu
authors.forename: Min
authors.initials: M
authors.lastname: Shi
mesh_terms: D000080:Acetals / Q000737:chemistry*; D002384:Catalysis; D003521:Cyclopropanes / Q000737:chemistry*; D007192:Indenes / Q000138:chemical synthesis*; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D000080:Acetals; D003521:Cyclopropanes; D007192:Indenes