title: Ytterbium triflate catalyzed synthesis of alkoxy-substituted donor-acceptor cyclobutanes and their formal [4 + 2] cycloaddition with imines: stereoselective synthesis of piperidines.
authors.affiliation: Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada.
authors.forename: Mahmoud M Abd Rabo
authors.initials: MM
authors.lastname: Moustafa
authors.forename: Brian L
authors.initials: BL
authors.lastname: Pagenkopf