Lien vers Pubmed [PMID] – 19775149
J. Org. Chem. 2009 Oct;74(20):7651-9
The synthesis and solution conformation of homo-oligomers of beta-aminoacids, beta-N-mannofuranosyl-3-ulosonic acids, have been studied by NMR, MD simulation, and circular dichroism. These oligomers feature a spirocyclic disubstitution and a N,O-acetal functionality at the beta-carbon of the backbone, an unprecedented situation in the realm of beta-peptides. Our study shows that tetramer 10 and hexamer 11 adopt a characteristic secondary structure. In the hexamer 11, NMR investigations coupled with MD simulations suggest the preference for a double C(8) turn forming conformation.