title: Tailoring flavins for visible light photocatalysis: organocatalytic [2+2] cycloadditions mediated by a flavin derivative and visible light.
abstract: A new application of flavin derivatives in visible light photocatalysis was found. 1-Butyl-7,8-dimethoxy-3-methylalloxazine, when irradiated by visible light, was shown to allow an efficient cyclobutane ring formation via an intramolecular [2+2] cycloaddition of both styrene dienes, considered as electron-rich substrates, and electron-poor bis(arylenones), presumably proceeding via an energy transfer mechanism.
authors.affiliation: Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic. cibulkar@vscht.cz.
authors.forename: Viktor
authors.initials: V
authors.lastname: Mojr
authors.forename: Eva
authors.initials: E
authors.lastname: Svobodová
authors.forename: Karolína
authors.initials: K
authors.lastname: Straková
authors.forename: Tomáš
authors.initials: T
authors.lastname: Neveselý
authors.forename: Josef
authors.initials: J
authors.lastname: Chudoba
authors.forename: Hana
authors.initials: H
authors.lastname: Dvořáková
authors.forename: Radek
authors.initials: R
authors.lastname: Cibulka