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|Type:||Artigo de periódico|
|Title:||Regio- and diastereoselective synthesis of 5-trans-substituted and 5,5-disubstituted 2-pyrrolidinones derived from (S)-malic acid|
|Abstract:||5-trans-Substituted 2-pyrrolidinones 6a, 6c and 6d and 5,5-disubstituted 2-pyrrolidinones 6e-k were regio- and diastereoselectively formed through the addition of organolithium species to imides 1a,b derived from malic acid, followed by addition of triethylsilane, allyltributyltin or TMSCN to the N-acyliminium ions formed in situ from the corresponding 5-hydroxy lactams. A short and diastereoselective synthesis of non-natural amino acid trans-4-hydroxy-D-proline is reported. (C) 2002 Elsevier Science Ltd. All rights reserved.|
|Editor:||Pergamon-elsevier Science Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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