356534-53-7Relevant articles and documents
Aza-amino acid scan for rapid identification of secondary structure based on the application of N-Boc-aza1-dipeptides in peptide synthesis
Melendez, Rosa E.,Lubell, William D.
, p. 6759 - 6764 (2007/10/03)
Azapeptides, peptide analogues in which the α-carbon of one or more of the amino acid residues is replaced with a nitrogen atom, exhibit propensity for adopting β-turn conformations. A general protocol for the synthesis of azapeptides without racemization on solid phase has now been developed by introducing the aza-amino acid residue as an N-Boc-aza1-dipeptide. This approach has been validated by the synthesis of six N-Boc-aza 1-dipeptides and their subsequent introduction into analogues of the C-terminal peptide fragment of the human calcitonin gene-related peptide (hCGRP). By performing an aza-amino acid scan of such antagonist peptides, a set of aza-hCGRP analogues was synthesized to examine the relationship between turn secondary structure and biological activity.
Combination of tert-butoxycarbonyl and triphenylphosphonium protecting groups in the synthesis of substituted hydrazines
Tsubrik, Olga,Maeeorg, Uno
, p. 2297 - 2299 (2007/10/03)
(matrix presented) A new reagent for the systematic synthesis of substituted hydrazines is reported. Unlike previously developed reagents, this one contains only two protecting groups, thus providing a faster approach to multisubstituted derivatives. The selective introduction of alkyl and acyl groups is illustrated by a few examples. Also a new fast method for the deprotection of the triphenylphosphonium group is presented.
