N-Hydroxybenzimidazole inhibitors of ExsA MAR transcription factor in Pseudomonas aeruginosa: In vitro anti-virulence activity and metabolic stability
摘要:
ExsA is a multiple adaptational response (MAR) transcription factor, regulating the expression of a virulence determinant, the type III secretion system (T3SS) in Pseudomonas aeruginosa. Non-cytotoxic, non-antibacterial N-hydroxybenzimidazoles were identified as effective inhibitors of ExsA-DNA binding, and their potential utility as anti-virulence agents for P. aeruginosa was demonstrated in a whole cell assay. Select N-hydroxybenzimidazole inhibitors were stable in an in vitro human liver microsomal assay. (C) 2010 Elsevier Ltd. All rights reserved.
Oxime‐derived palladacycle Immobilized in an Ionic Liquid Brush as an Efficient and Reusable Catalyst for Mozoroki‐Heck Reaction in Neat Water
作者:Rong Wang、Shan Li、Jing Li、Junfa Wei
DOI:10.1002/aoc.5226
日期:2019.11
An efficient and reusable heterogeneous catalyst with oxime‐derived palladacycle immobilized in an ionic liquid brush has been synthesized and an environmentally‐friendly procedure have been developed for coupling aryl iodides and bromides with acrylic acid. These reactions were conducted in neat water under aerobic conditions with water‐insoluble or even solid arylhalides and they proceeded smoothly
Magnetic polymer nanocomposite-supported Pd: an efficient and reusable catalyst for the Heck and Suzuki reactions in water
作者:Dongfang Wang、Wendong Liu、Fengling Bian、Wei Yu
DOI:10.1039/c4nj01581a
日期:——
Fe3O4@undecylenic acid. Pd2+ was then immobilized on this magnetic nanocomposite to form the magnetic Fe3O4@PUVS-Pd catalyst. This catalyst exhibited excellent catalytic activity for the Heck and Suzuki coupling reactions in water, and could be simply separated by using a permanent magnet. The supported catalyst could be used consecutively for six runs without significant loss of catalytic activity.
一种新的类型的磁响应聚合物纳米复合材料的铁3 ö 4 @poly(十一酸共-4-乙烯基吡啶共-sodium丙烯酸酯)(铁3 ö 4 @PUVS)通过4-乙烯基吡啶的自由基聚合来合成(4-VP)与丙烯酸钠(SAA)和Fe 3 O 4十一碳烯酸。然后将Pd 2+固定在该磁性纳米复合材料上以形成磁性Fe 3 O 4@ PUVS-Pd催化剂。该催化剂对水中的Heck和Suzuki偶联反应表现出出色的催化活性,可以通过使用永磁体简单地分离。负载的催化剂可连续使用六次,而催化活性没有明显损失。
Visible-light-enabled denitrative carboxylation of β-nitrostyrenes: a direct photocatalytic approach to cinnamic acids
作者:Shubhangi Tripathi、Lal Dhar S. Yadav
DOI:10.1039/c7nj04578f
日期:——
The first workable application of β-nitrostyrenes and CBr4 as coupling partners for a highly stereoselective synthesis of (E)-cinnamic acids under visible light photoredox catalysis is reported. The reaction involves a radical denitrative tribromomethylation/hydrolysis cascade to afford (E)-cinnamic acids in excellent yields at room temperature in a one-pot procedure. Moreover, the implementation of
An efficient Pd–NHC catalyst system in situ generated from Na<sub>2</sub>PdCl<sub>4</sub> and PEG-functionalized imidazolium salts for Mizoroki–Heck reactions in water
作者:Nan Sun、Meng Chen、Liqun Jin、Wei Zhao、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.3762/bjoc.13.168
日期:——
PEG-functionalized imidazolium salts L1-L3 were designed and prepared from commercially available materials via a simple method. Their corresponding water soluble Pd-NHC catalysts, in situ generated from the imidazolium salts L1-L3 and Na2PdCl4 in water, showed impressive catalytic activity for aqueous Mizoroki-Heck reactions. The kinetic study revealed that the Pd catalyst derived from the imidazolium salt L1
PdCl<sub>2</sub>(1-methylimidazole)<sub>2</sub>-catalysed Suzuki–Miyaura and Mizoroki–Heck Reactions Performed in Neat Water
作者:Yao Li、Xiao-Fang Lin、Meng-Yuan Liu、Lu-Lu Zhang、Ai-Ping Jin、Jian-Mei Lu
DOI:10.3184/174751913x13662179283121
日期:2013.5
PdCl2(1-methylimidazole)2 was an effective catalyst in neat water for the Suzuki–Miyaura and Mizoroki–Heck reactions of aryl bromides and iodides with, respectively, arylboronic acids and acrylic acid. Under optimal conditions, the products, variously substituted biphenyls and monosubstituted trans-cinnamic acids, respectively, were formed in good to almost quantitative yields.