Chemical, biochemical and microbiological properties of a brominated nitrovinylfuran with broad-spectrum antibacterial activity
摘要:
A di-bromo substituted nitrovinylfuran with reported broad-spectrum antibacterial activity was found to be a potent inhibitor of MurA, a key enzyme in peptidoglycan biosynthesis. Further characterization of the compound was carried out to assess its reactivity towards thiol nucleophiles, its stability and degradation under aqueous conditions, inhibitory potential at other enzymes, and antibacterial and cytotoxic activity. Our results indicate that the nitrovinylfuran derivative is reactive towards cysteine residues in proteins, as demonstrated by the irreversible inhibition of MurA and bacterial methionine aminopeptidase. Experiments with proteins and model thiols indicate that the compound forms covalent adducts with SH groups and induces intermolecular disulfide bonds, with the intermediate formation of a monobromide derivative. The parent molecule as well as most of its breakdown products are potent antibiotics with MIC values below 4 mu g/mL and are active against multiresistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). Further development of the bromonitrovinyl scaffold towards antibiotics with clinical relevance, however, requires optimization of the antibiotic-cytotoxic selectivity profile. (C) 2012 Elsevier Ltd. All rights reserved.
Chemical, biochemical and microbiological properties of a brominated nitrovinylfuran with broad-spectrum antibacterial activity
摘要:
A di-bromo substituted nitrovinylfuran with reported broad-spectrum antibacterial activity was found to be a potent inhibitor of MurA, a key enzyme in peptidoglycan biosynthesis. Further characterization of the compound was carried out to assess its reactivity towards thiol nucleophiles, its stability and degradation under aqueous conditions, inhibitory potential at other enzymes, and antibacterial and cytotoxic activity. Our results indicate that the nitrovinylfuran derivative is reactive towards cysteine residues in proteins, as demonstrated by the irreversible inhibition of MurA and bacterial methionine aminopeptidase. Experiments with proteins and model thiols indicate that the compound forms covalent adducts with SH groups and induces intermolecular disulfide bonds, with the intermediate formation of a monobromide derivative. The parent molecule as well as most of its breakdown products are potent antibiotics with MIC values below 4 mu g/mL and are active against multiresistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). Further development of the bromonitrovinyl scaffold towards antibiotics with clinical relevance, however, requires optimization of the antibiotic-cytotoxic selectivity profile. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of non-racemic dihydrofurans via Ni(II)-catalyzed asymmetric Michael addition
作者:Dmitry S. Nikerov、Maria A. Ashatkina、Vadim A. Shiryaev、Ilya M. Tkachenko、Victor B. Rybakov、Alexander N. Reznikov、Yuri N. Klimochkin
DOI:10.1016/j.tet.2021.132029
日期:2021.3
A highly efficient strategy for the enantio- and diastereoselective synthesis of 4,5-dihydrofuran derivatives was developed. Addition of carbonyl compounds which contain bulky adamantyl substituent and β-keto or phosphonate group to conjugated α-bromonitroolefins in the presence of a chiral Ni(II) complex gave corresponding non-racemic products of Michael reaction. These adducts were used for intramolecular
Reaction of 2-(2-bromo-2-nitroethenyl)furan derivatives with dimedone and cyclohexane-1,3-dione
作者:V. M. Berestovitskaya、S. V. Makarenko、K. A. Lyssenko、S. S. Eliseenko、R. I. Baichurin
DOI:10.1134/s1070428015090134
日期:2015.9
2-Bromo-5-(2-bromo-2-nitroethenyl)furan reacted with cyclohexane-1,3-dione and dimedone on heating in boiling benzene in the presence of triethylamine to give 3-(5-bromofuran-2-yl)-2-nitro-3,5,6,7- tetrahydro-1-benzofuran-4(2H)-ones. Analogous reactions of 5-nitro-2-(2-bromo-2-nitroethenyl)furan led to the formation of 3-(5-nitrofuran-2-yl)-6,7-dihydro-1-benzofuran-4(5H)-ones. The isolated products were character-.
Chemical, biochemical and microbiological properties of a brominated nitrovinylfuran with broad-spectrum antibacterial activity
作者:Therese Scholz、Carina L. Heyl、Dan Bernardi、Stefan Zimmermann、Lars Kattner、Christian D. Klein
DOI:10.1016/j.bmc.2012.11.018
日期:2013.2
A di-bromo substituted nitrovinylfuran with reported broad-spectrum antibacterial activity was found to be a potent inhibitor of MurA, a key enzyme in peptidoglycan biosynthesis. Further characterization of the compound was carried out to assess its reactivity towards thiol nucleophiles, its stability and degradation under aqueous conditions, inhibitory potential at other enzymes, and antibacterial and cytotoxic activity. Our results indicate that the nitrovinylfuran derivative is reactive towards cysteine residues in proteins, as demonstrated by the irreversible inhibition of MurA and bacterial methionine aminopeptidase. Experiments with proteins and model thiols indicate that the compound forms covalent adducts with SH groups and induces intermolecular disulfide bonds, with the intermediate formation of a monobromide derivative. The parent molecule as well as most of its breakdown products are potent antibiotics with MIC values below 4 mu g/mL and are active against multiresistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). Further development of the bromonitrovinyl scaffold towards antibiotics with clinical relevance, however, requires optimization of the antibiotic-cytotoxic selectivity profile. (C) 2012 Elsevier Ltd. All rights reserved.