80697-94-5Relevant articles and documents
SmI2-promoted intra- and intermolecular C-C bond formation with chiral N-acyl oxazolidinones
Taaning, Rolf H.,Thim, Laura,Karaffa, Jacob,Campa?a, Araceli G.,Hansen, Anna-Mette,Skrydstrup, Troels
experimental part, p. 11884 - 11895 (2009/04/07)
The suitability of chiral oxazolidinones in the SmI2-mediated C-C bond generation between the imide functionality of an N-acyl oxazolidinone unit and an olefinic radical acceptor, in both inter- and intramolecular reactions, was investigated. It was shown that the products from an Evans asymmetric alkylation can undergo direct carbon-carbon bond formation with an acrylamide providing chiral acyclic ketones in reasonable yields. These examples represent the first transformation of such N-acyl oxazolidinones where this chiral auxiliary is removed under the conditions for ketone formation. 5-exo-trig Cyclization studies were also undertaken with the same type of substrates, providing trans-2,5-disubstituted cyclopentanones in yields of approx. 50%. However, attempts to cyclize heteroatom-containing equivalents were less rewarding.
Asymmetric Alkylation Reactions of Chiral Imide Enolates. A Practical Approach to the Enantioselective Synthesis of α-Substituted Carboxylic Acid Derivatives
Evans, D. A.,Ennis, M. D.,Mathre, D. J.
, p. 1737 - 1739 (2007/10/02)
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