title: The formal [4+3] cycloaddition between donor-acceptor cyclobutanes and nitrones.
abstract: The formal [4+3] cycloaddition of 2-alkoxy-1,1-dicarboxylate activated donor-acceptor cyclobutanes with nitrones is disclosed. The reaction forms structurally unique oxazepines in moderate to high yield with a wide scope of nitrones. In most cases either a diastereomeric mixture or a single diastereomer may be formed, depending on the reaction conditions.
authors.affiliation: Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada.
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Stevens
authors.forename: Cory
authors.initials: C
authors.lastname: Palmer
authors.forename: Brian L
authors.initials: BL
authors.lastname: Pagenkopf