title: Rearrangement of a 2-methylenecyclobutanone derivative triggered by photoinduced electron transfer: an unprecedented oxa analogue of the tetramethyleneethane radical cation.
abstract: On irradiation of p-chloranil (CA), 2,2-bis(p-methoxyphenyl)-3,3-dimethyl-4-methylenecyclobutanone (1) gives 2,2-bis(p-methoxyphenyl)-4-isopropylidenecyclobutanone (2), whereas 2 affords a CA adduct (4), suggesting that a novel rearrangement of 1 to give 2 occurs irreversibly via intermediate 3*+, a radical cation variant of an unprecedented oxa analogue of tetramethyleneethane.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan. ikeda@org.chem.tohoku.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ikeda
authors.forename: Futoshi
authors.initials: F
authors.lastname: Tanaka
authors.forename: Kimio
authors.initials: K
authors.lastname: Akiyama
authors.forename: Shozo
authors.initials: S
authors.lastname: Tero-Kubota
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Miyashi