共查询到20条相似文献,搜索用时 15 毫秒
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Pachiappa N. Shanmugam Kalv I. Hemanth Kumar Paramasiva N. T. Perumal 《Journal of heterocyclic chemistry》2007,44(4):827-830
A diastereoselective synthesis of 4,5‐dihydrofurans by oxidative addition of 1,3‐dicarbonyl compounds with chalcones mediated by Mn(OAc)3 in moderate to good yields is reported. 相似文献
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Treatment of pyridine N‐oxides with dimethylthiocarbamoyl chloride in boiling acetonitrile effects chemoselective deoxygenation to pyridines. 相似文献
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The Chemistry and application of the title aldehyde and some simple derivatives thereof are reviewed. 相似文献
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P. Haranath V. Sreedhar Kumar C. Suresh Reddy C. Naga Raju C. Devendranath Reddy 《Journal of heterocyclic chemistry》2007,44(2):369-373
Substituted benzoxazaphosphorin 2‐yl ureas were synthesized by reacting 2‐(4‐fluoro‐phenylamino)‐methylphenol (4) with different carbamidophosphoric acid dichlorides (3) in the presence of triethylamine in dry toluene at 45‐50 °C and characterized by spectral data. These compounds were found to possess good antimicrobial activity. 相似文献
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A facile approach was developed on assembly of the 2‐pyridone nucleus by ferric chloride promoted [3+3] cycloaddition in propionic acid. The tandem process involves cyclization of Michael adduct followed by aromatization. Thus, different substituted 1,2‐dihydro‐2‐oxo‐3‐pyridinecarboxylate and 1,2‐dihydro‐2‐oxo‐3‐pyridinecarboxamide derivatives were prepared in good yields from various enones with malonamic ester and malonamide, respectively 相似文献
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ortho‐Hydroxy acetyl benzofuran derivatives have been synthesized in a regioselective cyclodehydration of aryloxyketones obtained from β‐resacetophenone and α‐halo ketones. 相似文献
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Siddheshwar D. Jadhav Nagnnath D. Kokare Sunil D. Jadhav 《Journal of heterocyclic chemistry》2008,45(5):1461-1464
A facile one‐pot synthesis of 2,4,5‐triaryl‐1H‐imidazoles with better yields and shorter reaction time from the condensation of benzil, ammonium acetate and aromatic aldehydes using the catalyst phosphomolybdic acid is described 相似文献
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Zhan‐Hui Zhang Jian‐Jiong Li Yuan‐Zhe Gao Yu‐Heng Liu 《Journal of heterocyclic chemistry》2007,44(6):1509-1512
Iodine was found to be an efficient catalyst for the synthesis of 2‐substituted benzimidazoles by the condensation of orthoesters and 1,2‐phenylenediamines in good to excellent yields under mild reaction conditions. 相似文献