title: Formal [4 + 2] cycloaddition of alkoxy-substituted donor-acceptor cyclobutanes and aldehydes catalyzed by Yb(OTf)3.
authors.affiliation: Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada.
authors.forename: Mahmoud M Abd Rabo
authors.initials: MM
authors.lastname: Moustafa
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Stevens
authors.forename: Ben P
authors.initials: BP
authors.lastname: Machin
authors.forename: Brian L
authors.initials: BL
authors.lastname: Pagenkopf