[EN] PROBES FOR RAPID AND SPECIFIC DETECTION OF MYCOBACTERIA<br/>[FR] SONDES POUR LA DÉTECTION RAPIDE ET SPÉCIFIQUE DE MYCOBACTÉRIES
申请人:UNIV LELAND STANFORD JUNIOR
公开号:WO2017027062A1
公开(公告)日:2017-02-16
The compositions of the present disclosure provide novel fluorogenic probes for use in the specific imaging and detection of mycobacteria species, and in particular β-lactam- antibiotic resistant. Specificity for mycobacteria is conferred on these probes by incorporating a moiety that specifically targets the unique trapping mechanism of the DprE1 found in in mycobacteria. Accordingly, only Mycobacteria species that express both a β- lactamase and DprE1 enable both the activation of the caged fluorescent probe, and the affixing of the released fluorescent probes to the bacteria cells through the functioning reduction-covalent binding mechanism. Advantageously, such a probe is able, at its most sensitive, to allow single mycobacterium detection.
Multifunctional multivalency: a focused library of polymeric cholera toxin antagonists
作者:Huu-Anh Tran、Pavel I. Kitov、Eugenia Paszkiewicz、Joanna M. Sadowska、David R. Bundle
DOI:10.1039/c0ob01089h
日期:——
the multivalent ligands is important for successful interaction with multimeric proteins. Polymer-based heterobifunctionalligands that contain pendant groups prearranged into heterodimers can be used to probe the active site and surrounding area of the receptor. Here we describe the synthesis and activities of a series of galactose conjugates on polyacrylamide and dextran. Conjugation of a second fragment
From Propargylic Amides to Functionalized Oxazoles: Domino Gold Catalysis/Oxidation by Dioxygen
作者:A. Stephen K. Hashmi、Maria Camila Blanco Jaimes、Andreas M. Schuster、Frank Rominger
DOI:10.1021/jo301288w
日期:2012.8.3
5-disubstituted oxazoles from propargylic amides is reported. A series of propargylic amides were transformed to the corresponding alkylideneoxazolines by a gold(I) catalyst. The next step was an autoxidation to hydroperoxides bearing the heteroaromatic oxazoles. Experiments addressing the reaction mechanism reveal a radical pathway for this autoxidation process. The hydroperoxides could conveniently be converted
A transition metal-free method for the cycloisomerization of propargylicamides to oxazoles was developed. The reaction utilizes in situ generated hydrogen chloride in hexafluoroisopropanol (HFIP). With the aid of Design of Experiments optimization a wide range of substrates was transformed into the desired oxazoles. The method allows product formation without side reactions eliminating the need for