described a C−H arylation/ring‐transformation strategy for the synthesis of triarylpyridines, which form the core structure of thiopeptide antibiotics. This synthetic method readily gave 2,3,6‐triarylpyridines in a regioselective manner by a two‐phase approach: C−H arylation (a nickel‐catalyzed decarbonylative Suzuki–Miyaura cross‐coupling and decarbonylative C−H coupling for the synthesis of 2,4‐diaryloxazoles)
作者:Sri Kamesh Narasimhan、Deborah J. Kerwood、Lei Wu、Jun Li、Rosina Lombardi、Teresa B. Freedman、Yan-Yeung Luk
DOI:10.1021/jo9013047
日期:2009.9.18
motif based on a C3-symmetric bowl-shaped core, on which three substituted amino acids on the periphery adopt either a folded or a spread-out conformation. This class of chiralfolded structures is achieved by controlling the reactivity of the stereogenic protons on the nonplanararomatic rings of trioxatricornan to afford predominantly C3-symmetric isomers. Bromination of trioxatricornan afforded a C1-symmetric
[EN] THIOREDOXIN MIMETIC PRODRUGS AND USES THEREOF<br/>[FR] PROMÉDICAMENTS MIMÉTIQUES DE LA THIORÉDOXINE ET LEURS UTILISATIONS
申请人:RADIKAL THERAPEUTICS INC
公开号:WO2016009341A1
公开(公告)日:2016-01-21
The present invention provides thioredoxin (TRX) mimetic prodrugs, more particularly, derivatives or analogues of the amino acid sequence Cys-Pro-Cys or A1 -Cys- A2 -Pro-A3 -Cys-A4 wherein A1 to A4 each independently is either absent or an amino acid residue, as well as pharmaceutical compositions comprising them. These compounds, upon hydrolysis under physiological conditions, are converted into the native Cys-Pro-Cys or A1-Cys-A2 -Pro-A3-Cys-A4 sequence, and are thus useful for prevention, treatment or management of diseases, disorders or conditions mediated by redox stress.
Sequence-Specific β-Peptide Synthesis by a Rotaxane-Based Molecular Machine
作者:Guillaume De Bo、Malcolm A. Y. Gall、Matthew O. Kitching、Sonja Kuschel、David A. Leigh、Daniel J. Tetlow、John W. Ward
DOI:10.1021/jacs.7b05850
日期:2017.8.9
the synthesis and operation of a three-barrier, rotaxane-based, artificial molecular machine capable of sequence-specific β-homo (β3) peptide synthesis. The machine utilizes nonproteinogenic β3-amino acids, a class of aminoacids not generally accepted by the ribosome, particularly consecutively. Successful operation of the machine via native chemical ligation (NCL) demonstrates that even challenging
A Series of Tripodal Cysteine Derivatives as Water‐Soluble Chelators that are Highly Selective for Copper(I)
作者:Anaïs M. Pujol、Christelle Gateau、Colette Lebrun、Pascale Delangle
DOI:10.1002/chem.201003613
日期:2011.4.11
cavity of the tripodal ligands stabilises these mononuclear complexes and was evidenced by the very low chemical‐shift temperature coefficient of the secondary amide protons. Moreover, L1 and L2 display large selectivities for the targeted metal ion that is, CuI, with respect to bioavailable ZnII. Therefore the two sulfur‐based tripods L1 and L2 are of potential interest for intracellular copper detoxication