A series of beta-diketone acrylate bioisosteres 4 of pseudomonic acid A 1 have been synthesized and evaluated for their ability to inhibit bacterial isoleucyl-tRNA synthetase and act as antibacterial agents. A number of analogues have excellent antibacterial activity. Selected examples were shown to afford good blood levels and to be effective in a murine infection model.
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http://dx.doi.org/10.1016/s0960-894x(99)00296-6 | DOI Listing |
Int J Mol Sci
December 2022
Department of Anatomy, College of Medicine, Konyang University Hospital, Daejeon 35365, Republic of Korea.
The core-shell structure of poly(St--MAA) nanoparticles containing β-diketonate Eu complexes were synthesized by a step-wise process. The β-diketonate Eu complexes of Eu (TFTB)(MAA)P(Oct) [europium (III); 4,4,4-Trifluoro-1-(2-thienyl)-1,3-butanedione = TFTB; trioctylphosphine = (P(Oct)); methacrylic acid = MAA] were incorporated to poly(St--MAA). The poly(St--MAA) has highly monodispersed with a size of 300 nm, and surface charges of the poly(St-co-MAA) are near to neutral.
View Article and Find Full Text PDFMethods Enzymol
June 2020
Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland; Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, United Kingdom. Electronic address:
In this chapter, we highlight the use of horseradish peroxidase (HRP) as a catalyst to initiate free radical polymerizations of vinyl monomers under benign reaction conditions. A variety of vinyl monomers, including 4-acryloylmorpholine (AM), 2-hydroxyethyl methacrylate (HEMA), and poly(ethylene glycol) methyl ether acrylate (PEGA) were polymerized. The enzyme converts exogenous hydrogen peroxide into a usable radical source, which when coupled with a β-diketone, yields a radical that initiates chain growth in the presence of monomers.
View Article and Find Full Text PDFRSC Adv
January 2019
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
Bio-derived lipophilic polydentate chelators have been synthesized and tested for their chelating ability using a range of metal salts of Cu, Co, Ni, Fe, and Cr. These novel molecules were produced by the Michael addition reaction of 14,16-hentriacontanedione, isolated from wheat straw wax, with methyl acrylate or bio-derived dimethyl itaconate microwave heating. The Michael adducts could either be used directly as esters or be hydrolysed to their acid form.
View Article and Find Full Text PDFSmall
December 2018
DWI-Leibniz-Institute for Interactive Materials e.V., Functional and Interactive Polymers, Institute for Technical and Macromolecular Chemistry, RWTH Aachen University, 52056, Aachen, Germany.
Herein, a novel method for the in situ growth of single gold nanoparticles (AuNPs) in microgel (MG) networks is presented. The key feature in this approach is the localization of β-diketone groups capable of both complexation and reduction of aurate ions in the MGs' core, which allows localization of the nucleation and growth of single AuNPs. The MG synthesis is carried out via precipitation polymerization in water with N-vinylcaprolactam as the main monomer and with the two comonomers acetoacetoxyethyl methacrylate (AAEM) and acrylic acid (AAc), where AAEM is mainly located in the MGs' core and AAc in their shell.
View Article and Find Full Text PDFDalton Trans
August 2013
Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P R China.
A new β-diketone, 5,6-dimethoxy-2(2,2,2-trifluoroethyl)-1-indone (5,6-DTFI), has been designed and synthesized. Two series of four 5,6-DTFI Sm(3+) and Eu(3+) complexes, namely, Eu(5,6-DTFI)3(H2O)2 (1), Eu(5,6-DTFI)3(Phen) (2), Sm(5,6-DTFI)3(H2O)2 (3) and Sm(5,6-DTFI)3(Phen) (4) (Phen = 1,10-phenanthroline), have been isolated. X-ray diffraction analysis reveals that all complexes 1-4 are of mononuclear structures.
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