Conventional and Microwave-Assisted Synthesis of Benzimidazole Derivatives and Their<i>In Vitro</i>Inhibition of Human Cyclooxygenase
作者:Daniela Secci、Adriana Bolasco、Melissa D'Ascenzio、Flavio della Sala、Matilde Yáñez、Simone Carradori
DOI:10.1002/jhet.1058
日期:2012.9
A large series of 1,2‐diaryl‐benzimidazole and 2‐aryl‐1H‐benzimidazolederivatives were synthesized with slight differences using both microwave irradiation and conventional heating methods. Usually higher yields and time reactions reduction were obtained with the former method. All compounds were assayed for their in vitro ability to inhibit humancyclooxygenases, and most of them showed an encouraging
A novel efficient method for the selective synthesis of 2-substituted benzimidazoles is described through condensation reaction of o-phenylenediamines with a wide rang of aliphatic, aromatic and heteroaromatic aldehyde substrates using Brönsted acidic ionic liquid as a reusable catalyst under metal-free conditions at ambient temperature. Notably, Dodecylimidazolium hydrogen sulfate ([DodecIm][HSO4])
An Efficient Synthesis of 2-Substituted Benzimidazoles via Photocatalytic Condensation of <i>o</i>-Phenylenediamines and Aldehydes
作者:Jeshma Kovvuri、Burri Nagaraju、Ahmed Kamal、Ajay K. Srivastava
DOI:10.1021/acscombsci.6b00107
日期:2016.10.10
method has been developed for the efficient synthesis of functionalized benzimidazoles. This protocol involves photocatalytic condensation of o-phenylenediamines with various aldehydes using the Rose Bengal as photocatalyst. The method was found to be general and was successfully employed for accessing pharmaceutically important benzimidazoles by the condensation of aromatic, heteroaromatic and aliphatic
Experimental and theoretical approving of anomeric based oxidation in the preparation of 2-sbstituted benz-(imida, oxa and othia)-zoles using [2,6-DMPy-NO<sub>2</sub>]C(NO<sub>2</sub>)<sub>3</sub> as a novel nano molten salt catalyst
作者:Mohammad Ali Zolfigol、Ardeshir Khazaei、Saied Alaie、Saeed Baghery、Farahnaz Maleki、Yadollah Bayat、Asiye Asgari
DOI:10.1039/c6ra13231f
日期:——
The synthesis of 2-sbstituted benz-(imida, oxa and othia)-zole derivatives were occurred in the presence of 2,6-dimethyl-1-nitropyridin-1-ium trinitromethanide [2,6-DMPy-NO2]C(NO2)3 via the condensation reaction between 1,2-phenylenediamine, 2-aminophenol, 2-aminothiophenol and corresponding aldehyde at...
Synthesis of Novel Indole-Benzimidazole Derivatives
作者:Xinying Wang、Yizhou Liu、Juan Xu、Fanwei Jiang、Congmin Kang
DOI:10.3184/174751916x14737735069962
日期:2016.10
2-Methylindole-3-acetic acid and its 5-methoxy derivative were prepared from the respective phenylhydrazines and levulinic acid. Indole-3-carboxylic acid was obtained from indole, dimethylformamide and trifluoroacetic acid. These indole carboxylic acids were then condensed with substituted o-phenylenediamines under high temperature conditions in the presence of polyphosphoric acid as a catalyst to