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Org Lett. 2005 Dec 8;7(25):5743-6.

Diastereoselective synthesis of 4-hydroxypiperidin-2-ones via Cu(I)-catalyzed reductive aldol cyclization.

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1
School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, United Kingdom. h.lam@ed.ac.uk

Abstract

[chemical reaction: see text]. 4-Hydroxypiperidin-2-ones may be prepared in highly diastereoselective fashion using a Cu(I)-catalyzed reductive aldol cyclization of alpha,beta-unsaturated amides with ketones. Used in combination with proline-catalyzed asymmetric Mannich reactions, this methodology enables the enantioselective synthesis of more highly functionalized piperidin-2-ones and hydroxylated piperidines.

PMID:
16321037
DOI:
10.1021/ol052599j
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