Expanding the structural repertoire of beta/alpha Ant-Pro (anthranilic acid-proline) oligomers into gamma/alpha 2-Amb-Pro (2-aminomethyl benzoic acid-proline) oligomers

TitleExpanding the structural repertoire of beta/alpha Ant-Pro (anthranilic acid-proline) oligomers into gamma/alpha 2-Amb-Pro (2-aminomethyl benzoic acid-proline) oligomers
Publication TypeJournal Article
Year of Publication2012
AuthorsRamesh, VVE, Priya, G, Rajamohanan, PR, Hofmann, H-J, Sanjayan, GJ
JournalTetrahedron
Volume68
Issue23
Pagination4399-4405
Date PublishedJUN
ISSN0040-4020
KeywordsAmino acids, Foldamer, Peptides, Proline, Synthetic oligomers
Abstract

In this article, we report a novel class of heterogeneous synthetic oligomers featuring the conformationally constrained amino acid residues - 2-aminomethyl benzoic acid (2-Amb) and proline (Pro) in repeating sequences. Oligomers as large as hexadecamers featuring the conformationally restricted gamma/alpha 2-Amb-Pro motif have been assembled using solution-phase Boc strategy, following multi-step synthetic sequences starting from the commercially available O-toluic acid. EDC-mediated peptide coupling has been found to be optimum for the assembly of the relatively non-polar oligomers, which could be readily purified by the standard column chromatographic purification procedures. This study offers considerable prospects of expanding the structural repertoire of beta/alpha Ant-Pro motif, which has been described earlier to assume right-handed helical architecture displaying robust nine-membered-ring closed network of hydrogen-bonding interactions, into gamma/alpha 2-Amb-Pro motif. (C) 2012 Elsevier Ltd. All rights reserved.

DOI10.1016/j.tet.2012.02.006
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.803
Divison category: 
Central NMR Facility
Organic Chemistry