965-52-6Relevant academic research and scientific papers
Nitrofuran drugs beyond redox cycling: Evidence of Nitroreduction-independent cytotoxicity mechanism
Gallardo-Garrido,Cho,Cortés-Rios,Vasquez,Pessoa-Mahana,Araya-Maturana,Pessoa-Mahana,Faundez
, (2020/06/23)
Nitrofurans (5-nitro-2-hydrazonylfuran as pharmacophore) are a group of widely used antimicrobial drugs but also associated to a variety of side effects. The molecular mechanisms that underlie the cytotoxic effects of nitrofuran drugs are not yet clearly understood. One-electron reduction of 5-nitro group by host enzymes and ROS production via redox cycling have been attributed as mechanisms of cell toxicity. However, the current evidence suggests that nitrofuran ROS generation by itself is uncapable to explain the whole toxic effects associated to nitrofuran consumption, proposing a nitro-reduction independent mechanism of toxicity. In the present work, a series of nitrated and non-nitrated derivatives of nitrofuran drugs were synthesized and evaluated in vitro for their cytotoxicity, ROS-producing capacity, effect on GSH-S-transferase and antibacterial activity. Our studies showed that in human cells non-nitrated derivatives were less toxic than parental drugs but, unexpectedly preserved the ability to generate intracellular ROS in similar amounts to nitrofurans despite not entering into a redox cycle mechanism. In addition, some non-nitrated derivatives although being uncapable to generate ROS exhibited the highest cell toxicity among all derivatives. Inhibition of cytosolic glutathione-S-transferase activity by some derivatives was also observed. Finally, only nitrofuran derivatives displayed antibacterial effect. Results suggest that the combined 2-hydrazonylfuran moiety, redox cycling of 5-nitrofuran, and inhibitory effects on antioxidant enzymes, would be finally responsible for the toxic effects of the studied nitrofurans on mammalian cells.
A 4 - hydroxy -2 ' - (5 - nitrofuran easy to be) - benzoyl jing synthetic method (by machine translation)
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Paragraph 0038-0041, (2019/01/10)
The invention discloses a 4 - hydroxy - 2' - (5 - nitrofuran easy to be) - benzoyl jing synthetic method. The method of the invention is hydroxy benzoic acid methyl ester will, hydrazine hydrate in ethanol aqueous solution in the hydrazinolysis, to obtain hydroxy benzoyl jing, then the hydroxy benzoyl jing with 5 - nitro furfural in dilute sulfuric acid catalytic under 50 - 90 °C reaction 1 - 3 hours, prepared by the condensation of 4 - hydroxy - 2' - (5 - nitrofuran easy to be) - [...]. The present invention provides a hydroxy benzoyl jingjing in the aqueous phase in a one-step synthesis of 4 - hydroxy - 2' - (5 - nitrofuran easy to be) - benzoyl jing method, the traditional pyridine solvent has handles improved, improves the product purity and yield, completely avoiding pollution of the pyridine solvent. (by machine translation)
Synthesis and investigation of antimicrobial activity of some nifuroxazide analogues
Alsaeedi, Huda S.,Aljaber, Nabila A.,Ara, Ismet
, p. 3639 - 3646 (2015/12/26)
A series of nifuroxazide analogues [(2a-2e)-(10a-10f)] have been synthesized, structurally identified and tested for antimicrobial activity against a panel of bacteria (Gram-positive and Gram-negative) and the yeast-like pathogenic fungus Candida albicans. The most active compound in this series was 4-amino-benzoic acid (5-nitro-furan-2-ylmethylene)-hydrazide (2b) and 2-amino-benzoic acid (5-nitrofuran-2-ylmethylene)-hydrazide (2d). Furthermore, compounds (9a-9g) and (10a-10g) recorded no activity against selected species except compounds (9f) and (10f) suggesting that using furoic hydrazide and the corresponding hydrazide of thiophene did not improve the antimicrobial activities for this type of compounds. Regarding the activity against Candida albicans, all compounds showed no activity with an exception of substituted nitro furan (2a-2d).
Antileishmanial activity screening of 5-nitro-2-heterocyclic benzylidene hydrazides
Rando, Daniela G.,Avery, Mitchell A.,Tekwani, Babu L.,Khan, Shabana I.,Ferreira, Elizabeth I.
, p. 6724 - 6731 (2008/12/22)
A series of 53 nitro derivatives rationally designed were obtained by parallel synthesis and screened against Leishmania donovani. Six compounds exhibited IC50 values lower than standard drugs. Brief SAR analysis revealed that substitution is important to the activity. Nitrothiophene analogues were more potent than the nitrofuran ones. This was attributed to the ability of sulfur atoms in accommodating electrons from nitro group, which facilitate its reduction and therefore the formation of free radicals lethal to parasites.
Synthesis and biological activity of nifuroxazide and analogs
Tavares,Penna,Amaral
, p. 244 - 249 (2007/10/03)
Nifuroxazide and thirteen analogs were synthesized from substituted benzoic acids and minimal inhibitory concentrations were determined using the serial dilution tests, in three sequential steps. Nifuroxazide and chloramphenicol were used as reference standards. The tests were performed in TSB against the standard bacterial strain of Staphylococcus aureus ATCC 25923.

