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
Title | 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 |
Publication Type | Journal Article |
Year of Publication | 2012 |
Authors | Ramesh, VVE, Priya, G, Rajamohanan, PR, Hofmann, H-J, Sanjayan, GJ |
Journal | Tetrahedron |
Volume | 68 |
Issue | 23 |
Pagination | 4399-4405 |
Date Published | JUN |
ISSN | 0040-4020 |
Keywords | Amino 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. |
DOI | 10.1016/j.tet.2012.02.006 |
Type of Journal (Indian or Foreign) | Foreign |
Impact Factor (IF) | 2.803 |