unnatural amino acid

amino acids have tremendously expanded the folding possibilities of peptides and peptide mimics. While α,α-disubstituted and β-amino acids are widely studied, γ-derivatives have been less exploited. Here we report the conformational study on the...

α,β2,3-Disteroisomeric foldamers of general formula Boc(S-Ala-β-2R,3R-Fpg)nOMe or Boc(S-Ala-β-2S,3S-Fpg)nOMe were prepared from both enantiomers of syn H-2-(2-F-Phe)-h-PheGly-OH (named β-Fpg) and S-alanine. Our peptides show two appealing features for biomedical applications: the presence of fluorine, attractive for non-covalent interactions,...

A new cyclic enantiopure β-amino acid, named β-Morph, containing the morpholino ring, was obtained in gram scale starting from an α-D-glucopyranose enantiopure material, focusing on the “environmental sustainability” concept. A series of ultrashort model...

Tetrahydroisoquinoline-4-carboxylic acid, a constrained beta-2-amino acid named beta-TIC, wassy in the sised for the first time in enantiopure form .The biocatalytic route applied herein represents one of the few successful examples of enzymatic resolu...

Amino acids are the building blocks of peptides and proteins. In million years of evolution, Nature has optimized their structures to absolve numerous functions in almost all the biological processes. They are indeed able...