Stereoselective synthesis of cis-2,6-disubstituted piperidines from 1,2-cyclic sulfamidates

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dc.contributor.authorEskici, M
dc.contributor.authorKaranfil, A
dc.date.accessioned2024-07-18T11:54:10Z
dc.date.available2024-07-18T11:54:10Z
dc.description.abstractDiastereoselective synthesis of cis-2,6-disubstituted piperidines from 1,2-cyclic sulfamidates is described. Regioselective ring-opening reactions of 1,2-cyclic sulfamidates derived from L-phenylalanine, alanine, valine, norvaline with the ketal protected acetylide with a phenyl substituent proceed smoothly to form the N-sulfamate intermediates which on acidic hydrolysis give alkynylated amines with the ketal group intact. Hydrogenation of the alkynylated amines, debenzylation, ketal deprotection, subsequent cyclization (of aminoketones) and stereoselective hydrogenation of the cyclic iminium ion intermediates afford the corresponding cis-2,6-disubstituted piperidines in high diastereoselectivity (98%>= d.e.) with good chemical yields (68-86%). The present approach provides a novel route for the stereoselective synthesis of cis-2.6-disubstituted piperidines. (C) 2019 Elsevier Ltd. All rights reserved.
dc.identifier.issn0040-4020
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/6163
dc.language.isoEnglish
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.subjectGLYCOSYL AMINO-ACIDS
dc.subjectASYMMETRIC-SYNTHESIS
dc.subjectENANTIOSELECTIVE SYNTHESIS
dc.subjectTRANS-2,6-DISUBSTITUTED PIPERIDINES
dc.subjectSUBSTITUTED PIPERIDINES
dc.subjectCATALYZED ARYLATION
dc.subjectLACTAM PRECURSORS
dc.subjectGRIGNARD-REAGENTS
dc.subjectCYCLIC SULFAMATE
dc.subjectNATURAL-PRODUCTS
dc.titleStereoselective synthesis of cis-2,6-disubstituted piperidines from 1,2-cyclic sulfamidates
dc.typeArticle

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