[EN] IMPROVEMENTS IN SOLID PHASE PEPTIDE SYNTHESIS<br/>[FR] AMÉLIORATIONS DANS LA SYNTHÈSE PEPTIDIQUE EN PHASE SOLIDE
申请人:CEM CORP
公开号:WO2017070512A1
公开(公告)日:2017-04-27
An improved method of deprotection in solid phase peptide synthesis is disclosed. In particular the deprotecting composition is added in high concentration and small volume to the mixture of the coupling solution, the growing peptide chain, and any excess activated acid from the preceding coupling cycle, and without any draining step between the coupling step of the previous cycle and the addition of the deprotection composition for the successive cycle. Thereafter, the ambient pressure in the vessel is reduced with a vacuum pull to remove the deprotecting composition without any draining step and without otherwise adversely affecting the remaining materials in the vessel or causing problems in subsequent steps in the SPPS cycle.
Building bridges for highly selective, potent and stable oxytocin and vasopressin analogs
作者:Rhiannon Beard、Andy Stucki、Muriel Schmitt、Gabrielle Py、Christophe Grundschober、Antony D. Gee、Edward W. Tate
DOI:10.1016/j.bmc.2018.03.019
日期:2018.7
agent, but it is highly sensitive to modification and suffers extensive degradation at elevated temperature and in vivo. Here we report studies towards OT analogs with favorable selectivity, affinity and potency towards the oxytocin receptor (OTR), in addition to improving stability of the peptide by bridging the disulfide region with substituted dibromo-xylene analogs. We found a sensitive structure-activity
Converting disulfide bridges in native peptides to stable methylene thioacetals
作者:C. M. B. K. Kourra、N. Cramer
DOI:10.1039/c6sc02285e
日期:——
peptides into highly stable methylene thioacetal. The transformation occurs under mild, biocompatible conditions, enabling the conversion of unprotected native peptides into analogues with enhanced stability. The developed protocol is applicable to a range of peptides and selective in the presence of a multitude of potentially reactive functional groups. The thioacetal modification annihilates the reductive
<i>trans</i>-Dichlorotetracyanoplatinate(IV) as a Reagent for the Rapid and Quantitative Formation of Intramolecular Disulfide Bonds in Peptides
作者:Tiesheng Shi、Dallas L. Rabenstein
DOI:10.1021/jo981748r
日期:1999.6.1
reaction mechanism similar to that for reduction of [Pt(CN)(4)Cl(2)](2)(-) by monothiols is proposed. [Pt(CN)(4)Cl(2)](2)(-) is a mild oxidant and essentially substitution inert; itsreduction product, [Pt(CN)(4)](2)(-), is stable, has no redox chemistry with peptides, and does not form complexes with peptides. Moreover, [Pt(CN)(4)Cl(2)](2)(-) and [Pt(CN)(4)](2)(-) are nontoxic and readily separable from
Platinum(iv) complexes with a heterocyclic ligand and an ancillary ligand have been investigated and applied for treating various tumour cell lines. Another application of the Pt(iv) complexes in forming peptide disulfide bonds was investigated in this work. For development of Pt(iv) complex chemistry for disulfide bond formation in peptides, two Pt(iv) complexes, [PtCl2(phen)(en)]Cl2 and [PtCl2(bpy)(en)]Cl2