Pseudo-Ring Methodology to Control the Conformations of Macrocyclic Peptides

Area of Science:

• Supramolecular Chemistry
• Organic Chemistry
• Chemical Biology

Background:

• Pseudo-rings are cyclic structures stabilized by hydrogen bonds.
• They can mimic covalently linked heterocycles.
• Pseudo-ring containing molecules exhibit dynamic 'open' and 'closed' conformations.

Purpose of the Study:

• To investigate the utility of pseudo-ring constructs in controlling macrocycle conformations.
• To understand how pseudo-ring dynamics affect molecular properties.
• To explore the potential of pseudo-ring containing macrocycles in specific applications.

Main Methods:

• Spectroscopic analysis to characterize pseudo-ring conformations.
• Lipophilicity measurements to quantify differences between conformational states.
• Investigation of fluorescence properties related to pseudo-ring dynamics.

Main Results:

• Spectroscopic data confirmed distinct three-dimensional structures for 'open' and 'closed' pseudo-ring macrocycles.
• Significant differences in lipophilicity were observed between the two conformational states.
• Tunable fluorescence was demonstrated, linked to the dynamic nature of pseudo-rings.

Conclusions:

• Pseudo-ring constructs offer effective control over macrocycle conformation and properties.
• Conformational changes significantly impact lipophilicity.
• The dynamic and tunable fluorescence of pseudo-rings holds promise for environment-sensitive applications.