- Preparation, antimicrobial evaluation and mutagenicity of differently substituted [2-hydroxyaryl]-[1-methyl-5-nitro-1H-2-imidazolyl]methanols
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An efficient preparation of the titled compounds is described, their antimicrobial activity and mutagenic properties being evaluated. Some of the studied compounds are non mutagenic and present a MIC as low as some of the usual standards in the field.
- Arredondo,Moreno-Manas,Pleixats,Palacin,Raga,Castello,Ortiz
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- Design, Synthesis, and Trypanocidal Activity of Novel 5-Nitroimidazolyl O-Benzyloxime Ethers
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In this paper, we describe the synthesis and the action against of the trypomastigote form of Trypanosoma cruzi of a new class of nitroimidazole-2-carbaldehyde O-benzyloximes. These derivatives were designed through the application of molecular hybridization concept between two potent antiprotozoal compounds, the 5-nitrothiophene-2-carbaldehyde O-oxime 6 and the trypanocidal piperidinyl-4-carbaldehyde O-benzyloxime 7 with the intention of reaching two distinct molecular targets of T.?cruzi. The activity of these benzyl ether derivatives was tested against the infective trypomastigote forms of T.?cruzi, and the derivative (E)-1-methyl-5-nitro-1H-imidazole-2-carbaldehyde O-(4-nitrobenzyl) oxime (1) presented moderate trypanocidal activity (IC50?=?12.7?μM) when compared with the standard drug benznidazole, which showed to be a good starting point for the design of more effective trypanocide agents.
- Carvalho, Samir Aquino,Osorio, Luis Felipe Baumotte,Salom?o, Kelly,de Castro, Solange Lisboa,Wardell, Solange M. S. V.,Wardell, James Lewis,da Silva, Edson Ferreira,Fraga, Carlos Alberto Manssour
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- Identification of novel functionalized carbohydrazonamides designed as chagas disease drug candidates
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Background: Although several research efforts have been made worldwide to discover novel drug candidates for the treatment of Chagas disease, the nitroimidazole drug benznidazol remains the only therapeutic alternative in the control of this disease. However, this drug presents reduced efficacy in the chronic form of the disease and limited safety after long periods of admini-stration, making it necessary to search for new, more potent and safe prototypes. Objective: We described herein the synthesis and the trypanocidalaction of new functionalized carbohydrazonamides (2-10) against trypomastigote forms of Trypanosoma cruzi. Methods: These compounds were designed through the application of molecular hybridization concept between two potent anti-T. cruzi prototypes, the nitroimidazole derivative megazol (1) and the cinnamyl N-acylhydrazone derivative (14) which have been shown to be twice as potent in vitro as benznidazole. Results: The most active compounds were the (Z)-N'-((E)-3-(4-nitrophenyl)-acryloyl)-1-methyl-5-nitro-1H-imidazol-2-carbohydrazonamide (6) (IC50 =9.50 μM) and the (Z)-N'-((E)-3-(4-hydroxyphe-nyl)-acryloyl)-1-methyl-5-nitro-1H-imidazol-2-carbohydrazonamide (8) (IC50 =12.85 μM), which were almost equipotent to benznidazole (IC50 =10.26 μM) used as standard drug. The removal of the amine group attached to the imine subunit in the corresponding N-acylhydrazone derivatives (11-13) resulted in less potent or inactive compounds. The para-hydroxyphenyl derivative (8) presented also a good selectivity index (SI = 32.94) when tested against mammalian cells from Swiss mice. Conclusion: The promising trypanocidal profile of new carbohydrazonamide derivatives (6) and (8) was characterized. These compounds have proved to be a good starting point for the design of more effective trypanocidal drug candidates.
- Do Nascimento, Mayara S. S.,Camara, Vitória R. F.,da Costa, Juliana S.,Barbosa, Juliana M. C.,Lins, Alessandra S. M.,Salom?o, Kelly,de Castro, Solange L.,Carvalho, Samir A.,da Silva, Edson F.,Fraga, Carlos A. M.
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p. 774 - 783
(2020/08/19)
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- Compound and its as L-type calcium channel blocker or/and application of acetylcholine esterase inhibitors
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Disclosed in this invention are compounds and the uses as L-type calcium channel blocker and/or acetylcholinesterase inhibitor thereof. The uses of said compounds in the manufactures of a medicament for the treatment of cardiovascular diseases, apoplexy or senile dementia are also disclosed in the present invention.
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Paragraph 0179; 0181-0182
(2016/10/07)
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- Synthesis and antiproliferative activity evaluation of imidazole-based indeno[1,2-b]quinoline-9,11-dione derivatives
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A series of new imidazole substituted indeno[1,2-b]quinoline-9,11-dione derivatives were synthesized and evaluated for their antiproliferative effects on HeLa, LS180, MCF-7 and Jurkat human cancer cell lines. Antiproliferative effects were evaluated using MTT assay. Prepared compounds exhibited weak to good antiproliferative activity in evaluated cell lines. Prepared compounds were more potent in Jurkat cell line when compared to LS180, HeLa and MCF-7 cell lines. Compounds 29 (IC16 = 0.7 μM) and 31 (IC16 = 1.7 μM) and 33 (IC16 = 1.7 μM) were found to be the most potent molecules on Jurkat cell lines. Moreover; it was found that some of the tested compounds bearing imidazole-2-yl moiety on the C11-position of dihydropyridine ring exhibited superior antiproliferative activity in comparison to cis-platin especially in Jurkat cell line (compounds 29, 31, and 33). It seemed that the introduction of electron-withdrawing groups on the imidazole ring enhanced the antiproliferative potential of these compounds (compounds 27, 29 and 31). The results of this study proposed that some of the imidazole substituted indeno[1,2-b]quinoline-9,11-dione compounds may act as efficient anticancer agents in vitro, emphasizing their potential role as a source for rational design of potent antiproliferative agents.
- Sarkarzadeh, Hasti,Miri, Ramin,Firuzi, Omidreza,Amini, Mohsen,Razzaghi-Asl, Nima,Edraki, Najmeh,Shafiee, Abbas
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p. 436 - 447
(2013/07/28)
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- 5-Nitroimidazole-based 1,3,4-Thiadiazoles: Heterocyclic analogs of metronidazole as anti-helicobacter pylori agents
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A series of 5-nitroimidazole-based 1,3,4-thiadiazoles were prepared and tested for antibacterial activity against Helicobacter pylori. The anti-H. pylori activity of target compounds along with the commercially available antimicrobial metronidazole was evaluated by comparing the inhibition-zone diameters determined by the paper disc diffusion bioassay. From our bioassay results against 20 clinical isolates it is evident that piperazinyl, 4-methylpiperazinyl, 3-methylpiperazinyl, and 3,5-dimethylpiperazinyl analogs (6a, 6b, 6e, and 6f, respectively) and pyrrolidine derivative 7 had strong activity at 0.5 μg/disc (average of inhibition zone >20 mm) while metronidazole had no activity at this dose. Compound 6f containing the 3,5-dimethylpiperazinyl moiety at the 2-position of the 5-(1-methyl-5-nitro-1H- imidazol-2-yl)-1,3,4-thiadiazole skeleton was the most potent compound tested at low concentrations.
- Moshafi, Mohammad Hassan,Sorkhi, Maedeh,Emami, Saeed,Nakhjiri, Maryam,Yahya-Meymandi, Azadeh,Negahbani, Amir Soheil,Siavoshi, Farideh,Omrani, Maryam,Alipour, Eskandar,Vosooghi, Mohsen,Shafiee, Abbas,Foroumadi, Alireza
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scheme or table
p. 178 - 183
(2011/10/08)
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- Synthesis and biological activity of nitro heterocycles analogous to megazol, a trypanocidal lead
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As part of our efforts to develop new compounds aimed at the therapy of parasitic infections, we synthesized and assayed analogues of a lead compound megazol, 5-(1-methyl-5-nitro-1H-2-imidazolyl)-1,3,4-thiadiazol-2-amine, CAS no. 19622-55-0), in vitro. We first developed a new route for the synthesis of megazol. Subsequently several structural changes were introduced, including substitutions on the two rings of the basic nucleus, replacement of the thiadiazole by an oxadiazole, replacement of the nitroimidazole part by a nitrofurane or a nitrothiophene, and substitutions on the exocyclic nitrogen atom for evaluation of an improved import by the glucose or the purine transporters. Assays of the series of compounds on the protozoan parasites Trypanosoma brucei, Trypanosoma cruzi, and Leishmania donovani, as either extracellular cells or infected macrophages, indicated that megazol was more active than the derivatives. Megazol was then evaluated on primates infected with Trypanosoma brucei gambiense, including late-stage central nervous system infections in combination with suramin. Full recovery was observed in five monkeys in the study with no relapse of parasitemia within a 2 year follow-up. Because there is a lack of efficacious treatments for sleeping sickness in Africa and Chagas disease in South America, megazol is proposed as a potential alternative. The mutagenicity of this compound is at present being reevaluated, and metabolism is also under investigation prior to possible further developments.
- Chauvière, Gérard,Bouteille, Bernard,Enanga, Bertin,De Albuquerque, Cristina,Croft, Simon L.,Dumas, Michel,Périé, Jacques
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p. 427 - 440
(2007/10/03)
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- Synthesis and evaluation of nitroheterocyclic phosphoramidates as hypoxia-selective alkylating agents
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A series of novel nitroheterocyclic phosphoramidates has been prepared, and the cytotoxicity of these compounds has been evaluated in clonogenic assays against B16, wild-type and cyclophosphamide-resistant MCF-7, and HT-29 cells under aerobic conditions and HT-29 cells under hypoxic conditions. All compounds were comparable in toxicity to wild-type and resistant MCF-7 cells and were also selectively toxic to HT-29 cells under hypoxic conditions (selectivity ratios 1.7 to > 20). Analogues lacking the nitro group were not cytotoxic. Electron-withdrawing substituents increased cytotoxicity under aerobic conditions and thereby decreased hypoxic selectivity. In contrast, an electron-donating substituent markedly decreased both aerobic and hypoxic cytotoxicity but enhanced hypoxic selectivity. Chemical reduction of the nitro group resulted in rapid expulsion of the cytotoxic phosphoramide mustard. The most potent of these compounds show significant cytotoxicity under both aerobic and hypoxic conditions.
- Borch, Richard F.,Liu, Jiwen,Schmidt, James P.,Marakovits, Joseph T.,Joswig, Carolyn,Gipp, Jerry J.,Mulcahy, R. Timothy
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p. 2258 - 2265
(2007/10/03)
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- Preparation, antimicrobial evaluation, and mutagenicity of [2- hydroxyaryl]-[1-methyl-5-nitro-1H-2-imidazolyl]methanols, [5-tert-butyl-2- methylaminophenyl]-[1-methyl-5-nitro-1H-2-imidazolyl] methanol, and [2- hydroxyaryl]-[1-methyl-5-nitro-1H-2-imidazolyl] ketones
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Efficient preparations of the titled compounds are described, their antimicrobial activity and mutagenic properties being evaluated. Some of the studied compounds are nonmutagenic and present a MIC as low as some of the usual standards in the field.
- Arredondo,Moreno-Manas,Pleixats,Palacin,Raga,Castello,Ortiz
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p. 1959 - 1968
(2007/10/03)
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- Functional derivatives of 1-methyl 2-formyl 5-nitroimidazole. Evaluation of their antiparasitic activities
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New imidazole compounds with pharmacological activity were obtained after subjecting 1-methyl-2-formyl-5-nitroimidazole to classical organic reactions: aldimine production, Knoevenagel reaction, and 4-ylidenebutenolide production. Some of these compounds exhibit significant antiparasitic activities against amoebae, trichomonas and leishmania.
- Vanelle,Maldonado,Jentzer,Crozet,Savornin,Delmas,Gasquet,Timon-David
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p. 321 - 325
(2007/10/02)
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- Isoxazole substituted nitroimidazoles
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Novel substituted nitroimidazoles are provided, for example, 2-(4,5-substituted-isoxazol-3-yl)-1-substituted-5-nitroimidazole; 2-(4,5-disubstituted-Δ2 -isoxazolin-3-yl)-1-substituted-5-nitroimidazole; or 2-(4,5-disubstituted-2-loweralkyl-isoxazolidin-3-yl)-1-substituted-5-nitroimidazole. These compounds have antibacterial and antiprotozoal activity, especially against human and animal trypanosomiasis and trichomoniasis.
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- Processes for preparing 5-nitro-1-methyl-2-(2-dialkylaminovinyl)-imidazole and 5-nitro-1-methyl-2-imidazolyl carboxaldehyde
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1-SUBSTITUTED 5-NITRO-2-(2-DIALKYLAMINOVINYL)-IMIDAZOLES HAVING TRICHOMONACIDAL ACTIVITY OF THE FORMULA: SPC1 Wherein R is H, CH3 or C2 H5 and X is hydrocarbon or hydrocarbon substituted with a halogen or a hydroxy, ether, ester or amino group, are produced by reacting the 1-substituted-5-nitro-2-alkyl-imidazoles with an aminal ester or amidoacetal of orthoformic acid or like functionally reactive derivative thereof.
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- Method for promoting growth of poultry with 3-(5-nitro-2-imidazolyl)pyrazoles
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There are disclosed novel 3-(5-nitro-2-imidazolyl)-pyrazoles exhibiting utility as antibacterial, antiprotozoal, and antifungal agents, making the compounds useful particularly in veterinary medicine, especially in controlling bacterial and protozoal infections of cattle, swine, and poultry. The compounds are also active as growth promoters in chickens.
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- Substituted nitroimidazolyl thiadiazoles and oxadiazoles as antibacterial agents and growth promoting compounds
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The use of substituted nitroimidazolyl-thiadiazoles and oxadiazoles are described along with methods of administration of the same. These compounds are active in enhancing the growth rate of warm-blooded animals and in controlling the growth of pathogenic microorganisms such as bacteria.
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