title: Stacking and Electrostatic Interactions Drive the Stereoselectivity of Silylium-Ion Asymmetric Counteranion-Directed Catalysis.
abstract: Computational analysis shows that the enantioselectivity of asymmetric Lewis-acid organocatalysis of the Diels-Alder cycloaddition of cyclopentadiene to cinnamates arises from stacking interactions that favor the addition of the diene to the more hindered face of the dienophile, while electrostatic interactions control the diastereoselectivity by selectively stabilizing the endo transition state. These results not only explain the stereoselectivity of these silylium-ion-ACDC reactions but should also guide the development of more effective ion-pairing asymmetric organocatalysts.
authors.affiliation: Department of Chemistry, Texas A&M University, College Station, TX, 77842, USA.
authors.forename: Trevor J
authors.identifier: 0000-0002-2526-2475
authors.initials: TJ
authors.lastname: Seguin
authors.affiliation: Department of Chemistry, Texas A&M University, College Station, TX, 77842, USA.
authors.forename: Steven E
authors.identifier: 0000-0001-7824-6906
authors.initials: SE
authors.lastname: Wheeler
keywords: asymmetric catalysis; computational chemistry; lewis acids; organocatalysis; theoretical chemistry