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 | 
