Chirality Organization of Ferrocenes Bearing Dipeptide Chains of Heterochiral Sequence

The symmetrical introduction of two dipeptide chains of heterochiral sequence (-l-Ala-d-Pro-NHPy) into the ferrocene scaffold as a central reverse-turn unit was demonstrated to induce both antiparallel β-sheet-like and type II β-turn-like structures simultaneously, affording the chirality-organized structure. The ferrocene bearing only one dipeptide chain (-l-Ala-d-Pro-NHPy) exhibited a left-handed helically ordered molecular assembly through a network of intermolecular hydrogen bonds instead of intramolecular hydrogen bonds.