Control of Helix Screw-Sense Preference in Dynamic Foldamers of meso Symmetry Built From Chiral Monomeric Units.
Meso oligoureas are dynamic hydrogen-bonded foldamers capable of reversible helix polarity inversion but have so far been limited to symmetrical meso-cyclohexane-1,2-diamine monomeric units, limiting both sequence diversity and structural modification. Here, we report the synthesis and characterization of meso and "nea...