1432595-78-2Relevant articles and documents
Diastereotopic fluorine substituents as 19F NMR probes of screw-sense preference in helical foldamers
Pike, Sarah J.,De Poli, Matteo,Zawodny, Wojciech,Raftery, James,Webb, Simon J.,Clayden, Jonathan
, p. 3168 - 3176 (2013/06/04)
Ligating simple amino alcohol or amino ester monomers containing enantiotopic fluorine substituents to the C-terminus of a helical peptide places the fluorine atoms in diastereotopic environments, and gives two distinct and easily identifiable signals in the 19F NMR spectrum. In the case of a dynamically inverting helix built from achiral monomers, the chemical shift separation between the 19F signals provides a simple means of analysing the ratio of screw-sense conformers in the oligomer, in cases where an asymmetric bias leads to a screw-sense preference. The Royal Society of Chemistry 2013.