title: Enantioselective access to bicyclo[4.2.0]octanes by a sequence of [2+2] photocycloaddition/reduction/fragmentation.
abstract: Tricks of the trade: Because intramolecular Cu-catalyzed access to bicyclo[4.2.0]octanes is not feasible, an oxygen bridge was introduced to facilitate the [2+2] photocycloaddition. Starting from compounds similar to 1, products such as 2 could be obtained enantioselectiviely in three steps after ring-opening metathesis (see scheme).
authors.forename: Guoyin
authors.initials: G
authors.lastname: Yin
authors.forename: Eberhardt
authors.initials: E
authors.lastname: Herdtweck
authors.forename: Thorsten
authors.initials: T
authors.lastname: Bach