Nitrone protecting groups for enantiopure N-hydroxyamino acids: synthesis of N-terminal peptide hydroxylamines for chemoselective ligations
作者:S. Irene Medina、Jian Wu、Jeffrey W. Bode
DOI:10.1039/c004490c
日期:——
The synthesis of enantiopure N-benzylidene nitrones of N-hydroxy-α-amino acids and their incorporation using standard Fmoc-based peptide chemistry into solid-supported peptide chains is described. Deprotection and resin cleavage affords N-terminal peptide hydroxylamines, which are the key substrates for chemoselective ligations with C-terminal peptide α-ketoacids. This general route is applicable to
Peptide Fragment Coupling Using a Continuous-Flow Photochemical Rearrangement of Nitrones
作者:Yuan Zhang、Melissa L. Blackman、Andrew B. Leduc、Timothy F. Jamison
DOI:10.1002/anie.201300504
日期:2013.4.8
amide bond formation by way of a continuous‐flow photochemicalrearrangement of nitrones was described (see scheme). Simple aryl‐alkyl amide bonds as well as complex peptide bonds were constructed efficiently with a residence time less than 20 minutes. A tetrapeptide was synthesized in this way and the method could be applied to peptidefragmentcoupling.