174649-09-3Relevant articles and documents
Synthesis of covalent bonding MWCNT-oligoethylene linezolid conjugates and their antibacterial activity against bacterial strains
Alatorre-Barajas, José A.,Alcántar-Zavala, Eleazar,Alonso-Nú?ez, Gabriel,Cabrera, Alberto,Estrada-Zavala, Edgar,Gil-Rivas, M. Graciela,Gochi-Ponce, Y.,Medina-Franco, J. L.,Montes-ávila, Julio,Ochoa-Terán, Adrián,Reynoso-Soto, Edgar A.,Rivera-Lugo, Yazmin Yorely,Trujillo-Navarrete, Balter
, p. 28912 - 28924 (2021/09/22)
Nowadays, infectious diseases caused by drug-resistant bacteria have become especially important. Linezolid is an antibacterial drug active against clinically important Gram positive strains; however, resistance showed by these bacteria has been reported. Nanotechnology has improved a broad area of science, such as medicine, developing new drug delivery and transport systems. In this work, several covalently bounded conjugated nanomaterials were synthesized from multiwalled carbon nanotubes (MWCNTs), a different length oligoethylene chain (Sn), and two linezolid precursors (4and7), and they were evaluated in antibacterial assays. Interestingly, due to the intrinsic antibacterial activity of the amino-oligoethylene linezolid analogues, these conjugated nanomaterials showed significant antibacterial activity against various tested bacterial strains in a radial diffusion assay and microdilution method, including Gram negative strains asEscherichia coli(11 mm, 6.25 μg mL?1) andSalmonella typhi(14 mm, ≤0.78 μg mL?1), which are not inhibited by linezolid. The results show a significant effect of the oligoethylene chain length over the antibacterial activity. Molecular docking of amino-oligoethylene linezolid analogs shows a more favorable interaction of theS2-7analog in the PTC ofE. coli.
Synthesis and biological evaluation of novel 5-(hydroxamic acid)methyl oxazolidinone derivatives
Phillips, Oludotun A.,D'Silva, Roselyn,Bahta, Teklu O.,Sharaf, Leyla H.,Udo, Edet E.,Benov, Ludmil,Eric Walters
, p. 120 - 131 (2015/11/24)
Research activities on the oxazolidinone antibacterial class of compounds continue to focus on developing newer derivatives with improved potency, broad-spectrum activity and safety profiles superior to linezolid. Among the safety concerns with the oxazolidinone antibacterial agents is inhibition of monoamine oxidases (MAO) resulting from their structural similarity with toloxatone, a known MAO inhibitor. Diverse substitution patterns at the C-5 position of the oxazolidinone ring have been shown to significantly affect both antibacterial activity and MAO inhibition to varying degrees. Also, the antibacterial activity of compounds containing iron-chelating functionalities, such as the hydroxamic acids, 8-hydroxyquinolines and catechols have been correlated to their ability to alter iron intake and/or metabolism. Hence a series of novel 5-(hydroxamic acid)methyl oxazolidinone derivatives were synthesized and evaluated for their antibacterial and MAO-A and -B inhibitory activities. The compounds were devoid of significant antibacterial activity but most demonstrated moderate MAO-A and -B inhibitory activities. Computer modeling studies revealed that the lack of potent antibacterial activity was due to significant steric interaction between the hydroxamic acid N-OH oxygen atom and one of the G2540 5′-phosphate oxygen atoms at the bacterial ribosomal binding site. Therefore, the replacement of the 5-acetamidomethyl group of linezolid with the 5-(N-hydroxyacetamido)methyl group present in the hydroxamic acid oxazolidinone derivatives was concluded to be detrimental to antibacterial activity. Furthermore, the 5-(hydroxamic acid)methyl oxazolidinone derivatives were also less active as MAO-A and -B inhibitors compared with linezolid and the selective inhibitors clorgyline and pargyline. In general, the 5-(hydroxamic acid)methyl oxazolidinone derivatives demonstrated moderate but selective MAO-B inhibitory activity.
PROCESS FOR THE PREPARATION OF CRYSTALLINE LINEZOLID
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, (2013/06/05)
The present invention discloses a stable crystalline Form-I of linesolid process for preparation thereof.