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Type: Artigo de periódico
Title: Creation of quaternary stereocenters by the addition of allyltributyltin to chiral cyclic N-acyliminium ions
Author: Schuch, CM
Pilli, RA
Abstract: 5,5-Disubstituted pyrrolidinones and 5-substituted pyrrolidinones were obtained with moderate to good diastereoisomeric excess through the cis addition of allyltributyltin and triethylsilane, respectively, to the 4-OTBS group in the N-acyliminium ion prepared from the corresponding 5-hydroxy lactams. Cyclization of an N-allyl-5-propargyl pyrrolidinone and N-allyl-5-allyl-5-substituted pyrrolidinones using Grubbs' catalyst led to the preparation of a dehydropyrre lizinone and dehydroindolizinones containing a quaternary stereocenter. (C) 2000 Elsevier Science Ltd. All rights reserved.
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Tetrahedron-asymmetry. Pergamon-elsevier Science Ltd, v. 11, n. 3, n. 753, n. 764, 2000.
Rights: fechado
Identifier DOI: 10.1016/S0957-4166(99)00537-6
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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