- Benzimidazole Ribonucleosides: Design, Synthesis, and Antiviral Activity of Certain 2-(Alkylthio)- and 2-(Benzylthio)-5,6-dichloro-1-(β-D-ribofuranosyl)benzimidazoles
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Several 2-alkylthio and 2-benzylthio derivatives of 5,6-dichloro-1-(β-D-ribofuranosyl)benzimidazole (DRB) have been designed and synthesized from 5,6-dichloro-1-(β-D-ribofuranosyl)benzimidazole-2-thione.All compounds were evaluated for activity against hu
- Devivar, Rodrigo V.,Kawashima, Etsuko,Revankar, Ganapathi R.,Breitenbach, Julie M.,Kreske, Edward D.,et al.
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- Design, synthesis, and antitumor activity of PLGA nanoparticles incorporating a discovered benzimidazole derivative as EZH2 inhibitor
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Purpose: Targeting enhancer of zeste homolog 2 (EZH2) can represent a hopeful strategy for oncotherapy. Also, the use of PLGA-based nanoparticles as a novel and rate-controlling carrier system was of our concern. Methods: Benzimidazole derivatives were synthesized, and their structures were clarified. In vitro antitumor activity was evaluated. Then, a modeling study was performed to investigate the ability of the most active compounds to recognize EZH2 active sites. Compound 30 (Drug) was selected to conduct pre-formulation studies and then it was incorporated into polymeric PLGA nanoparticles (NPs). NPs were then fully characterized to select an optimized formula (NP4) that subjected to further evaluation regarding antitumor activity and protein expression levels of EZH2 and EpCAM. Results: The results showed the antitumor activity of some synthesized derivatives. Docking outcomes demonstrated that Compound 30 was able to identify EZH2 active sites. NP4 exhibited promising findings and proved to keep the antitumor activity of Compound 30. HEPG-2 was the most sensitive for both Drug and NP4. Protein analysis indicated that Drug and NP4 had targeted EZH2 and the downstream signaling pathway leading to the decline of EpCAM expression. Conclusions: Targeting EZH2 by Compound 30 has potential use in the treatment of cancer especially hepatocellular carcinoma.
- Elkot, Hoda A.,Ragab, Ibrahim,Saleh, Noha M.,Amin, Mohamed N.,Al-Rashood, Sara T.,El-Messery, Shahenda M.,Hassan, Ghada S.
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- Highly Diastereoselective Synthesis of Dihydro-benzoimidazo-[1,3]-thiazines via Electro-oxidative Selenocyclization of Thioallyl Benzoimidazoles
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The current methodology reveals a green and proficient electro-oxidative tandem selenocyclization of thioallyl benzoimidazoles manufacturing selenylated dihydro-benzoimidazo-thiazine derivatives. Both C?Se and C?N bond formation were achieved via this mild protocol which exhibits good functional group tolerability affording an extensive range of substrate scope up to 96% isolated yields. Complete control over the regioselective formation of the six-membered heterocycle and stereoselective construction of the contiguous stereocenters was established. The practical electrochemical method operates in an undivided cell at ambient temperature without using any metal and external chemical oxidant.
- Halder, Atreyee,Mahanty, Kingshuk,Maiti, Debabrata,De Sarkar, Suman
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supporting information
p. 3895 - 3899
(2021/10/23)
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- An environmentally benign and efficient synthesis of substituted benzothiazole-2-thiols, benzoxazole-2-thiols, and benzimidazoline-2-thiones in water
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An efficient and practical method for the one-step synthesis of benzothiazole-2-thiols, benzoxazole-2-thiols and benzimidazoline-2-thiones by cyclization of 2-aminothiophenols, 2-aminophenols, and 1,2-phenylenediamines with tetramethylthiuram disulfide (TMTD) in water was described. The features of this method include metal/ligand-free, excellent yield, short reaction time and broad substrate scope. The method provides a facile and convenient preparation of some potentially biologically active compounds.
- Liu, Xing,Liu, Min,Xu, Wan,Zeng, Meng-Tian,Zhu, Hui,Chang, Cai-Zhu,Dong, Zhi-Bing
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p. 5591 - 5598
(2017/12/06)
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- Novel and improved method for the synthesis of 2-mercaptobenzimidazole derivatives
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2-mercaptobenzimidazole derivatives were synthesized by reaction of o-phenylenediamines with N-aminorhodanine. This reaction represent a new synthesis of 2-mercaptobenzazole. The structure of the obtained products was established by spectroscopic data.
- El Kihel,Ait Sir,Jebbari,Ahbala,Guesmi,Bauchat
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p. 1765 - 1768
(2016/10/24)
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- Synthesis and antiprotozoal activity of novel 2-{[2-(1H-imidazol-1-yl) ethyl]sulfanyl}-1H-benzimidazole derivatives
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A series of 19 new 2-{[2-(1H-imidazol-1-yl)ethyl]sulfanyl}-1H-benzimidazole derivatives was synthesized starting from the properly substituted 1,2-phenylendiamine. These compounds have hydrogen or methyl at position 1; while hydrogen, chlorine, ethoxy or methoxycarbonyl group is at position 5 and/or 6. The novel compounds were tested against protozoa Trichomonas vaginalis, Giardia intestinalis and Entamoeba histolytica. Experimental evaluations revealed strong activity for all tested compounds, having IC 50 values in the nanomolar range, which were even better than metronidazole, the drug of choice for these parasites.
- Pérez-Villanueva, Jaime,Hernández-Campos, Alicia,Yépez-Mulia, Lilián,Méndez-Cuesta, Carlos,Méndez-Lucio, Oscar,Hernández-Luis, Francisco,Castillo, Rafael
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p. 4221 - 4224
(2013/07/25)
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- Synthesis and biological evaluation of benzo[d]imidazole derivatives as potential anti-cancer agents
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We herein report the synthesis, biological activity and structure-activity relationship of derivatives of 5,6-dichloro-1-β-d- ribofuranosylbenzimidazole and benzo[d]imidazole. A lead compound 6o demonstrates potent anti-proliferative activity and the ability to induce cancer cell apoptosis.
- Alkahtani, Hamad M.,Abbas, Abdullahi Y.,Wang, Shudong
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scheme or table
p. 1317 - 1321
(2012/04/04)
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- NOVEL VIRAL REPLICATION INHIBITOR
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The present invention relates to a pharmaceutical composition for the treatment or prevention of viral infections comprising as an active principle at least one benzimidazole conjugates derivative havin the general formula I. The invention also relates to processes for the preparation of compounds according to the invention having above mentioned general formula and their use as a medicine or to treat or prevent viral infections.
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Page/Page column 15-16
(2008/06/13)
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- Synthesis and antiparasitic activity of 1H-benzimidazole derivatives.
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Compounds 1-18 have been synthesized and tested in vitro against the protozoa Giardia lamblia, Entamoeba histolytica and the helminth Trichinella spiralis. Inhibition of rat brain tubulin polymerization was also measured and compared for each compound. Results indicate that most of the compounds tested were more active as antiprotozoal agents than Metronidazole and Albendazole. None of the compounds was as active as Albendazole against T. spiralis. Although only compounds 3, 9 and 15 (2-methoxycarbonylamino derivatives) inhibited tubulin polymerization, these were not the most potent antiparasitic compounds.
- Valdez, Juan,Cedillo, Roberto,Hernandez-Campos, Alicia,Yepez, Lilian,Hernandez-Luis, Francisco,Navarrete-Vazquez, Gabriel,Tapia, Amparo,Cortes, Rafael,Hernandez, Manuel,Castillo, Rafael
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p. 2221 - 2224
(2007/10/03)
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- BENZIMIDAZOLE COMPOUNDS
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A benzimidazole compound or a salt thereof which has an inhibitory action of forming of macrophages and is useful as an active ingredient of an orally available medicament for preventive and/or therapeutic treatment of arteriosclerosis, which is represented by the formula (I): wherein, R1 represents one or more functional groups on the benzene ring selected from the group consisting of hydrogen atom, a halogen atom, a lower alkyl group and a lower alkoxy group; R2 represents hydrogen atom, an alkyl group or an acyl group; L represents a C4-C8 alkylene group or an ethyleneoxy linking group represented as (CH2CH2O)nCH2CH2 wherein n represents 1 or 2; X represents O or NH; Y represents S or a single bond; and Q represents a 5- or 6-membered heterocyclic group which may have a functional group on the ring.
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- Benzimidazoles as NMDA glycine-site antagonists: Study on the structural requirements in 2-position of the ligand
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A series of different substituted benzimidazole derivatives has been synthesized and evaluated for the ability to displace [3H]MDL-105,519 to rat cortical membranes. Two benzimidazole-2-carboxylic acids 9 b and 9 c, in this substitution pattern not yet described as glycine antagonists, showed IC50 values of 0.89 μM (9 b) and 38.0 μM (9 c). Replacement of the carboxylate function in 2-position by a sulfonic acid moiety appreciably increased solubility, but decreased the affinity giving evidence for the strong need of the carboxylate group within the ligand. Further structure-activity studies using benzimidazol-2-one derivatives with an acetic acid moiety adjacent to a ring nitrogen revealed new insights into the importance of amide functionalities within the heterocycle for the affinity of antagonist glycine-site ligands.
- Dannhardt, Gerd,Kohl, Beate K.
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p. 123 - 129
(2007/10/03)
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- Glycine receptor antagonists and the use thereof
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Methods of treating or preventing neuronal loss associated with stroke, ischemia, CNS trauma, hypoglycemia and surgery, as well as treating neurodegenerative diseases including Alzheimer's disease, amyotrophic lateral sclerosis, Huntington's disease and Down's syndrome, treating or preventing the adverse consequences of the hyperactivity of the excitatory amino acids, as well as treating anxiety, chronic pain, convulsions, inducing anesthesia and treating psychosis are disclosed by administering to an animal in need of such treatment a compound having high affinity for the glycine binding site, lacking PCP side effects and which crosses the blood brain barrier of the animal. Also disclosed are novel 1,4-dihydroquinoxaline-2,3-diones, and pharmaceutical compositions thereof. Also disclosed are highly soluble ammonium salts of 1,4-dihydroquinoxaline-2,3-diones.
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- Synthesis and antiviral evaluation of 2-mercapto-5,6- dichlorobenzimidazole-β-D-ribofuranonucleoside derivatives
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2-Mercapto-5,6-dichlorobenzimidazole β-D-ribofuranonucleoside derivatives 8 - 10 have been synthesized and their antiviral properties examined. According to the glycosylation procedure used, the β-D-N-1 isomer (and the N,N-bis-riboside) or the β-D-S2-isomer have been obtained. All the prepared compounds were tested for their activity against a variety of RNA and DNA viruses, but they did not show significant antiviral activity.
- Mathe,Perigaud,Gosselin,Imbach
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p. 437 - 446
(2007/10/02)
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- 2H-Benzimidazoles (Isobenzimidazoles). Part 7. A New Route to Triclabendazole and Congeneric Benzimidazoles
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A new synthesis of the selective anthelmintic agent triclabendazole 7 from the readily available 5,6-dichloro-2H-benzimidazole-2-spirocyclohexane 2 by simple steps is described.Analogous benzimidazoles difficult to prepare by conventional methods are similarly obtained.Triclabendazole can exist as a low-melting metastable solid (m.p. 85-90 deg C) convertible by heating or recrystallisation from ethanol into its stable form (m.p. 176-178 deg C).
- Iddon, Brian,Kutschy, Peter,Robinson, Andrew G.,Suschitzky, Hans,Kramer, Walter,Neugebauer, Franz A.
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p. 3129 - 3134
(2007/10/02)
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- Pesticidal compositions containing phosphoric esters and divalent sulphur compounds
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Pesticidal composition comprising: a pesticidal, phosphoric ester the molecule of which has at least one alkyl group of 1 to 3 carbon atoms, 0.05 to 10% of an agent stabilizing the said ester against decomposition by protonisation, together with adjuvants characterized in that the stabilizing agent comprises at least one sulphur compound containing per molecule at least one divalent sulphur atom of which one valence is bonded to an atom chosen from sulphur, carbon, nitrogen, hydrogen, and metals capable of giving a salt, the other valence being bonded to an atom chosen from hydrogen, the carbon atom already noted, a second carbon atom, the nitrogen atom already noted, a second nitrogen atom, the metal atom already noted in the case of a metal of valence greater than one, a second atom of metal and oxygen when the first valence is not attached to an atom of hydrogen, the proportion of sulphur calculated with reference to the weight of the sulphur compound being between 5 and 99%. Process for stabilizing a phosphoric ester of which the molecule possesses at least one alkyl group containing 1 to 3 carbon atoms characterized in that there is added to the phosphoric ester or to a mixture which contains it, 0.05 to 10% calculated on the weight of the phosphoric acid ester of an agent capable of stabilizing the said phosphoric ester against protonisation and comprising at least one sulphur compound such as that defined thereupon.
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