Thiazolidine-Protected β-Thiol Asparagine: Applications in One-Pot Ligation–Desulfurization Chemistry
作者:Jessica Sayers、Robert E. Thompson、Kristen J. Perry、Lara R. Malins、Richard J. Payne
DOI:10.1021/acs.orglett.5b02468
日期:2015.10.2
The synthesis of a β-thiol asparagine derivative bearing a novel (2,4,6-trimethoxyphenyl)thiazolidine protecting group is described. The efficient incorporation of the amino acid into the N-termini of peptides is demonstrated as well as the utility of the β-thiol asparagine moiety for rapid ligation reactions with peptide thioesters. The streamlined synthesis of native peptide products could be accomplished
Oxidative Deselenization of Selenocysteine: Applications for Programmed Ligation at Serine
作者:Lara R. Malins、Nicholas J. Mitchell、Sheena McGowan、Richard J. Payne
DOI:10.1002/anie.201504639
日期:2015.10.19
Despite the unique chemical properties of selenocysteine (Sec), ligation at Sec is an under‐utilized methodology for protein synthesis. We describe herein an unprecedented protocol for the conversion of Sec to serine (Ser) in a single, high‐yielding step. When coupled with ligation at Sec, this transformation provides a new approach to programmedligations at Ser residues. This new reaction is compatible
Chemoselective Peptide Ligation-Desulfurization at Aspartate
作者:Robert E. Thompson、Bun Chan、Leo Radom、Katrina A. Jolliffe、Richard J. Payne
DOI:10.1002/anie.201304793
日期:2013.9.9
Asp‐ecially useful: A synthetic β‐mercapto aspartate residue facilitates the rapid ligation to a range of peptide thioesters. Following the ligation reaction (and without purification), chemoselective desulfurization of the β‐mercapto moiety in the presence of unprotected cysteine residues afforded native peptide products.
One-Pot Peptide Ligation–Desulfurization at Glutamate
作者:Katie M. Cergol、Robert E. Thompson、Lara R. Malins、Peter Turner、Richard J. Payne
DOI:10.1021/ol403288n
日期:2014.1.3
steps from protected glutamic acid and could be incorporated at the N-terminus of peptides. The application of these peptides in one-pot ligation–desulfurization chemistry is demonstrated with a range of peptide thioesters, and the utility of this methodology is highlighted through the synthesis of the osteoporosis peptide drug teriparatide (Forteo).
A novel ligation method for the synthesis of phosphopeptides and peptides is described, which utilises the inherent reactivity of a peptide bearing an N-terminal phosphoserine or phosphothreonine residue to facilitate amide bond formation with a range of C-terminal peptide thioesters.