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Origin of Stereoselectivity in the Imidazolidinone-Catalyzed Reductions of Cyclic α,β-Unsaturated Ketones

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journal contribution
posted on 01.10.2009, 00:00 by Osvaldo Gutierrez, Robert G. Iafe, K. N. Houk
The organocatalytic transfer hydrogenation reactions of 3-phenyl-2-cyclopentenone with imidazolidinone catalysts are evaluated using the hybrid density functional (B3LYP/6-31G(d)) theory. The origin of the preference for the (E) iminium transition state is determined, and the stereoselectivity of hydride transfer is investigated.