title: Simple construction of bicyclo[4.3.0]nonane, bicyclo[3.3.0]octane, and related benzo derivatives by palladium-catalyzed cycloalkenylation.
abstract: [reaction: see text] Bicyclo[4.3.0]nonanes (hydrindanes) and bicyclo[3.3.0]octanes (octahydropentalenes) are easily synthesized by palladium-catalyzed cycloalkenylations. Additionally, benzo-fused bicyclo[3.3.0]octanes are prepared for the first time through intramolecular coupling between silyl enol ethers and aromatic rings in the presence of catalytic palladium acetate.
authors.affiliation: Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aobayama, Sendai 980-8578, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Toyota
authors.forename: Andivelu
authors.initials: A
authors.lastname: Ilangovan
authors.forename: Rei
authors.initials: R
authors.lastname: Okamoto
authors.forename: Tomohito
authors.initials: T
authors.lastname: Masaki
authors.forename: Makoto
authors.initials: M
authors.lastname: Arakawa
authors.forename: Masataka
authors.initials: M
authors.lastname: Ihara