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

dc.contributor.authorEskici M.
dc.contributor.authorKaranfil A.
dc.date.accessioned2025-04-10T11:07:22Z
dc.date.available2025-04-10T11:07:22Z
dc.date.issued2019
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. © 2019 Elsevier Ltd
dc.identifier.DOI-ID10.1016/j.tet.2019.01.030
dc.identifier.urihttp://hdl.handle.net/20.500.14701/47336
dc.publisherElsevier Ltd
dc.titleStereoselective synthesis of cis-2,6-disubstituted piperidines from 1,2-cyclic sulfamidates
dc.typeArticle

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