CHED 315 |
The selective α-reduction of α,β-epoxycarbonyls to the corresponding β-hydroxycarbonyls was explored using silyllithium reagents. The proposed mechanism for the reaction involves a nucleophilic attack by the silicon atom on the carbonyl of the substrate, followed by a Brook rearrangement and concomitant epoxide ring opening. The resulting silicon-oxygen bond is then cleaved by a second equivalent of the silyllithium reagent to afford the β-hydroxycarbonyl product. A variety of differentially substituted α,β-epoxycarbonyls were synthesized and treated with excess silyllithium reagent in order to determine the synthetic utility of the reaction.
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Undergraduate Research Poster Session: Organic Chemistry
2:30 PM-4:30 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Poster
Division of Chemical Education |