Regulation of Orthogonal Functions in a Dual Catalyst System. Subservient Role of a Nonchiral Lewis Acid in an Asymmetric Catalytic Heteroatom Diels-Alder Reaction. - Newman, Cory A.; Antilia, Jon C.; Pei Chen; Predeus, Alexander V.; Lee Fielding; Wulff, William D. (Journal of the American Chemical Society, 2007)