title: Electron-transfer-induced intermolecular [2+2] cycloaddition reactions based on the aromatic "redox tag" strategy.
abstract: Novel electron-transfer-induced intermolecular [2+2] cycloaddition reactions between an aliphatic cyclic enol ether and several unactivated olefins have been demonstrated on the basis of the aromatic "redox tag" strategy. The aromatic "redox tag" was oxidized during the formation of the cyclobutane ring, affording the relatively long-lived aromatic radical cation, which was then reduced to complete the overall reaction that constructed the corresponding [2+2] cycloadducts. The aromatic "redox tag" was also found to facilitate electron-transfer-induced cycloreversion reactions of cyclobutane rings.
authors.affiliation: Department of Applied Life Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Okada
authors.forename: Asaki
authors.initials: A
authors.lastname: Nishimoto
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Akaba
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Chiba