title: Control of the mode selectivity (ene reaction versus [2 + 2] cycloaddition) in the photooxygenation of ene carbamates: directing effect of an alkenylic nitrogen functionality.
abstract: The geometry of the double bond in oxazolidinone-substituted ene carbamates controls the mode selectivity (ene reaction versus [2+2] cycloaddition) of singlet oxygen through stereoelectronic effects, whereas the chiral auxiliary provides high diastereoselectivity through steric shielding.
authors.affiliation: Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany. adam@chemie.uni-wuerzburg.de
authors.forename: Waldemar
authors.initials: W
authors.lastname: Adam
authors.forename: Sara G
authors.initials: SG
authors.lastname: Bosio
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Turro