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http://hdl.handle.net/10261/199404
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dc.contributor.author | Saavedra, Carlos J. | - |
dc.contributor.author | Boto, Alicia | - |
dc.contributor.author | Hernández, Rosendo | - |
dc.contributor.author | Miranda, José Ignacio | - |
dc.contributor.author | Aizpurua, Jesús M. | - |
dc.date.accessioned | 2020-01-31T14:02:25Z | - |
dc.date.available | 2020-01-31T14:02:25Z | - |
dc.date.issued | 2012-07-05 | - |
dc.identifier | doi: 10.1021/jo300892u | - |
dc.identifier | issn: 0022-3263 | - |
dc.identifier | e-issn: 1520-6904 | - |
dc.identifier.citation | Journal of Organic Chemistry 77(14): 5907-5913 (2012) | - |
dc.identifier.uri | http://hdl.handle.net/10261/199404 | - |
dc.description.abstract | Short α,β,α-tripeptides comprising a central chiral trisubstituted β 2,2,3*-amino acid residue form unusual γ-turns and δ-turns in CDCl 3 and DMSO-d 6 solutions but do not form β-turns. Thermal coefficients of backbone amide protons, 2D-NMR spectra, and molecular modeling revealed that these motifs were strongly dependent on the configuration (chiral effect) of the central β-amino acid residue within the triad. Accordingly, SSS tripeptides adopted an intraresidual γ-turn like (C6) arrangement in the central β-amino acid, whereas SRS diastereomers preferred an extended δ-turn (C9) conformation. A different SRS-stabilizing bias was observed in the crystal structures of the same compounds, which shared the extended δ-turn (C9) found in solution, but incorporated an additional extended β-turn (C11) to form an overlapped double turn motif. | - |
dc.description.sponsorship | We thank the Gobierno Vasco (Project SAIOTEK S-PR10BF02) and Ministerio de Ciencia e Innovación (Project CTQ2009-07109) for financial support and SGIker UPV/EHU for NMR facilities. C.J.S. thanks Gobierno de Canarias for a predoctoral fellowship. | - |
dc.language | eng | - |
dc.publisher | American Chemical Society | - |
dc.relation.isversionof | Postprint | - |
dc.rights | closedAccess | - |
dc.subject | Amides | - |
dc.subject | Peptides and proteins | - |
dc.subject | Solvents | - |
dc.subject | Conformation | - |
dc.subject | Molecular structure | - |
dc.title | Conformation and chiral effects in α,β,α-tripeptides | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1021/jo300892u | - |
dc.relation.publisherversion | http://dx.doi.org/10.1021/jo300892u | - |
dc.date.updated | 2020-01-31T14:02:26Z | - |
dc.contributor.funder | Ministerio de Ciencia e Innovación (España) | - |
dc.contributor.funder | Gobierno de Canarias | - |
dc.relation.csic | Sí | - |
dc.identifier.funder | http://dx.doi.org/10.13039/501100004837 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.cerifentitytype | Publications | - |
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