Synthesis of Benzimidazole Thiazolinone Derivatives under Microwave Irradiation
作者:Jun Yu、Peng Hu、Taoyu Zhou、Yanhua Xu
DOI:10.3184/174751911x13203357106346
日期:2011.11
containing the thiazolinone ring are of increasing interest due to their bactericidal, pesticidal, anticonvulsant, antiinflammatory, antithyroidal and antimicrobialactivities. A rapid microwave-assistedsynthesis thiazolinone derivatives is described. The 3-(1H-benzo[d]imidazol-2-yl)-2-substituted phenyl thiazolidin-4-one were identified by IR, 1H NMR, elemental analyses. The target compounds were performed
An Efficient Synthesis of Schiff Bases Containing Benzimidazole Moiety Catalyzed by Bismuth Trichloride Under Microwave Irradiation
作者:A. Thirupathaiah、D. Dasharatham
DOI:10.13005/ojc/280175
日期:2012.3.18
A simple and efficient method has been developed for the synthesis of some novel Schiffbases via the reaction of aromatic aldehydes with 2-aminobenzimidazole by using catalytic amount of BiCl 3 in an organic solvent undermicrowaveirradiation. Some advantages of this protocol are its very good yields, use of available catalysts, simple workup procedure, and short reaction times.
A simple and efficient method has been developed for the synthesis of some novel Schiff bases via the reaction of aromatic aldehydes with 2-aminobenzimidazole by using catalytic amount of M(NO_3)_2.xH_2O in an organic solvent at room temperature. Some advantages of this protocol are its very good yields, use of available catalysts, simple workup procedure, and short reaction times.
Facile one-pot synthesis of novel <i>N</i>-benzimidazolyl-α-arylnitrones catalyzed by salts of transition metals
作者:Mehdi Kalhor、Sima Samiei、S. Ahmad Mirshokraei
DOI:10.1039/c9ra08570j
日期:——
A novel series of N-benzimidazol-2-yl-α-aryl nitrones 3a–j is synthesized via simple one-pot condensation/oxidation of 2-aminobenzimidazole, an aromatic aldehyde and m-chloro perbenzoic acid (m-CPBA) as an effective oxidant using Mn(NO3)2·6H2O as an efficient catalyst at room temperature. All synthesized N-benzimidazolyl nitrones were identified using FTIR, NMR and mass spectroscopy. Also, stability
通过简单的一锅缩合/氧化 2-氨基苯并咪唑、芳香醛和间氯过苯甲酸 ( m -CPBA)合成了一系列新型N-苯并咪唑-2-基-α-芳基硝酮3a-j室温下使用Mn(NO 3 ) 2 ·6H 2 O 作为高效催化剂的有效氧化剂。所有合成的N-苯并咪唑基硝酮均使用 FTIR、NMR 和质谱进行鉴定。此外,还进行了稳定性能理论计算,并为3a的异构结构生成了1 H NMR 计算光谱; 结果表明,稳定性顺序为恶氮丙啶( 4 ) ,其次是硝酮3a E和3a Z。此外,将计算光谱结果与实验数据进行比较表明与硝酮3a E非常一致。在该协议的显着点中,首次在温和的氧化条件下从原料中制备出稳定的 N-杂环硝酮。因此,它们可以很容易地用作在温和条件下合成有价值的杂环的高潜力中间体。由于使用廉价且可用的催化剂、反应时间短、产率高、易于后处理以获得纯产物以及易于分离副产物等优点(m-氯苯甲酸),这个简单的协议非常符合绿色化学的原则。
Benzimidazol‐1‐yl‐1‐phenylpropanone Analogs as Potent Antimicrobial Agents: Rational Design and Synthesis
strains (Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis, Staphylococcus aureus), whereas derivative 3-(2-((2-fluorobenzylidene)amino)-1H-benzo[d]imidazol-1-yl)-1-phenylpropan-1-one (6c), was potent against Escherichia coli, Bacillus subtilis, Staphylococcus aureus and displayed moderate action against P. aeruginosa. Derivatives with NO2 substituent at 3rd and 4th position, 3-(2-((3-nitrooben