A New and Efficient Synthesis of Unnatural Amino Acids and Peptides by Selective 3,3-Dimethyldioxirane Side-Chain Oxidation
摘要:
N-Boc derivatives of Leu, Met, Thr, Trp, and Pro, the properties of which resemble those of the respective alpha-amino acid residues present in proteins, rapidly oxidize in the presence of 3,3-dimethyldioxirane to give different products depending on the structure of the oxidizable group in the side chain. A high regioselectivity for the oxygen atom insertion into the gamma-CH bond of Leu residues with respect to the weaker alpha-CH bond was observed. A position selectivity in the oxidation of peptides containing more than one Leu residue was also found.
Fully Enzymatic Peptide Synthesis using C-Terminal tert-Butyl Ester Interconversion
作者:Timo Nuijens、Claudia Cusan、Theodorus J. G. M. van Dooren、Harold M. Moody、Remco Merkx、John A. W. Kruijtzer、Dirk T. S. Rijkers、Rob M. J. Liskamp、Peter J. L. M. Quaedflieg
DOI:10.1002/adsc.201000313
日期:2010.10.4
Chemoenzymatic peptide synthesis is potentially the most cost-efficient technology for the synthesis of short and medium-sized peptides with some important advantages. For instance, stoichiometric amounts of expensive coupling reagents are not required and racemisation does not occur, thus rendering purification easier compared to chemical peptide synthesis. The economically most attractive synthesis runs in the