Explaining the handedness of life: Stereochemistry plays an important role in the self-assembly of peptides, guided by molecular recognition and self-sorting. Homochiral peptides form the stronger aggregates, which may be one of reasons why homochirality is preferred in living systems.
Furan-Based Locked<i>Z</i>-Vinylogous γ-Amino Acid Stabilizing Protein α-Turn in Water-Soluble Cyclic α<sub>3</sub>γ Tetrapeptides
作者:Yarkali Krishna、Shrikant Sharma、Ravi S. Ampapathi、Dipankar Koley
DOI:10.1021/ol5002126
日期:2014.4.18
Described here is the design, synthesis, and conformational analysis of cyclic tetrapeptides (CTPs) with α3γ architecture containing a furan-based locked Z-vinylogous amino acid (Vaa). This unnatural amino acid locks into a γ-turn that induces type IαRS-turn in the CTPs. Stabilized by a 13-membered intramolecular H-bond, these CTPs show robust conformation in water and aprotic solvent irrespective
Synthesis of chiral tripeptides by asymmetric hydrogenation of dehydrotripeptides. Remarkable effects of N-protecting groups on stereoselectivity and reactivity