Regio- and stereoselective cycloadditions of cyclic nitrones to maleic diamide forced in a peptide: synthesis of potent ligands of human NK-2 receptor

Synthetically accessible, high-affinity phosphate anion receptors

We report synthetically accessible receptors with protonated amines attached to a conformationally constrained backbone including amide units, and demonstrate that these receptors have high affinities (log K > 5) for phosphate anions in aqueous media at pH 7 in the presence of high concentrations of competitive chloride anions (ca. 100-fold excess).

Regio- and stereocontrolled Diels–Alder reaction tethered by Asp-Thr dipeptide

The Asp-Thr tethered Diels-Alder reaction of 1a was accomplished to provide 2a exclusively in a regio- and stereoselective manner.

Successful bridging from a peptide to a non peptide antagonist at the human tachykinin NK-2 receptor

Non peptide products have been found to show nanomolar binding and functional affinities at the human tachykinin NK-2 receptor. The new antagonists do not possess stereogenic centers and their thermal behaviour in solution is featured by a peculiar set of conformational stereoisomers. A macroscopic viewpoint is preferentially adopted to rationalize the obtained results.