Reduction of ethanethiol esters of α-amino acids to α-amino aldehydes by triethylsilane and catalytic palladium-on-carbon is described. α-Amino aldehydes with Boc, Cbz, or Fmoc protection could be obtained without racemization in high yield.
Preparation of Peptide Thioesters through Fmoc-Based Solid-Phase Peptide Synthesis by Using Amino Thioesters
作者:Nicolai Stuhr-Hansen、Theis S. Wilbek、Kristian Strømgaard
DOI:10.1002/ejoc.201300927
日期:2013.8
procedure for the synthesis of peptide alkyl thioesters by 9-fluorenylmethoxycarbonyl (Fmoc) solid-phasepeptidesynthesis was developed. The free C terminus of a fully protected peptide was coupled in solution with the free amino group of an amino thioester. This furnished the fully protected peptidethioester, which was globally deprotected to afford the desired unprotected peptidethioester. The method
Synthesis of Histidine-Containing Oligopeptides via Histidine-Promoted Peptide Ligation
作者:Kai-Jin Huang、Yi-Chen Huang、Yuya A. Lin
DOI:10.1002/asia.201701802
日期:2018.2.16
synthesis of histidine‐containing peptides is not trivial due to the potential of imidazole sidechain of histidine to act as a nucleophile if unprotected. A peptide ligation method utilizing the imidazole sidechain of histidine has been developed. The key imidazolate intermediate that acts as an internal acyltransfercatalyst during ligation is generated by deprotonation. Transesterification with amino
Facile, Fmoc-Compatible Solid-Phase Synthesis of Peptide C-Terminal Thioesters
作者:Dominique Swinnen、Donald Hilvert
DOI:10.1021/ol0060836
日期:2000.8.1
A short route to peptide C-terminal thioesters was developed that does not require the use of special linkers or resins and is compatible with standard Fmoc chemistry. Following conventional solid-phase peptide synthesis, an excess of Me(2)AlCl and EtSH in dichloromethane cleaves peptides from Wang or Pam resins to give the corresponding thioesters directly in good yield and purity.
Robustness, Entrainment, and Hybridization in Dissipative Molecular Networks, and the Origin of Life
作者:Brian J. Cafferty、Albert S. Y. Wong、Sergey N. Semenov、Lee Belding、Samira Gmür、Wilhelm T. S. Huck、George M. Whitesides
DOI:10.1021/jacs.9b02554
日期:2019.5.22
(rather than stop) these oscillations, when homogeneity in their composition does not. Specifically, multiple reactants in an amide-forming network sustainoscillation when the environment (here, the space velocity) changes, while homogeneous networks-those with fewer reactants-do not. Remarkably, a mixture of two reactants of different structure-neither of which produces oscillations individually-oscillates