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Solution Structure of Quinoline‐ and Pyridine‐Derived Oligoamide Foldamers

Authors :
Dolain, Christel
Grélard, Axelle
Laguerre, Michel
Jiang, Hua
Maurizot, Victor
Huc, Ivan
Source :
Chemistry - A European Journal; October 2005, Vol. 11 Issue: 21 p6135-6144, 10p
Publication Year :
2005

Abstract

The unambiguous elucidation of a new folded structure in solution may prove to be a very challenging task. The NMR protocols developed for solving the solution structures of α‐peptides have been applied to aliphatic β‐ and γ‐peptides but are not directly applicable to aromatic oligomers. In particular, the string of spin systems in an aromatic sequence cannot be reconstituted solely from correlations between protons. For aromatic oligomers, it is shown that the assignment of a large part of the 13C NMR spectrum through HMBC and HSQC experiments allows to unambiguously assign proton NMR spectra and in turn to interpret NOE correlations. This has been implemented both with quinoline‐ and pyridine‐derived oligoamide foldamers, and should be applicable to a wide range of oligomers including various combinations of monomers. The NOE correlations allow the unambiguous solution structure elucidation of helical conformations of oligoamides derived from pyridine and quinoline monomers showing that, in these series, the solution structures correspond very well to the structures observed in the solid state.

Details

Language :
English
ISSN :
09476539 and 15213765
Volume :
11
Issue :
21
Database :
Supplemental Index
Journal :
Chemistry - A European Journal
Publication Type :
Periodical
Accession number :
ejs7822334
Full Text :
https://doi.org/10.1002/chem.200500395