Microwave Assisted Urea-Acetic Acid Catalyzed Knoevenagel Condensation of Ethyl Cyanoacetate and 1,3-Thiazolidine-2,4-dione with Aromatic Aldehydes under Solvent Free Condition
作者:Pravin. T. Tryambake
DOI:10.14233/ajchem.2017.20695
日期:——
conditions [17], microwave irradiation [18], piperidine in ethanol [19a], piperidinium acetate in toluene under reflux conditions [19b], piperidinium acetate in DMF under microwave irradiation [20], glycine and sodium carbonate in H2O under reflux conditions [21], grinding with ammonium acetate in the absence of solvents [22], alum in H2O [23], Baker’s yeast [24], KF-Al2O3 under microwave irradiation [25]
Tellurium(IV) tetrachloride catalysed facile knoevenagel reaction
作者:Rahat H. Khan、Raj K. Mathur、Anil C. Ghosh
DOI:10.1080/00397919608086741
日期:1996.2
Abstract Non-enolisable aldehydes (I) and active methylene compounds (II) react in the presence of tellurium(IV) tetrachloride (catalytic) to give the corresponding α, β-unsaturated carbonyl compounds (III) in excellent yields and high purity.
摘要 不可烯醇化的醛 (I) 和活性亚甲基化合物 (II) 在四氯化碲 (IV)(催化)存在下反应,以优异的收率和高纯度反应生成相应的 α, β-不饱和羰基化合物 (III)。
Phosphane-Catalyzed Knoevenagel Condensation: A Facile Synthesis ofα-Cyanoacrylates andα-Cyanoacrylonitriles
作者:Jhillu S. Yadav、Basi V. Subba Reddy、Ashok K. Basak、Boddapati Visali、Akkirala Venkat Narsaiah、Kommu Nagaiah
DOI:10.1002/ejoc.200300513
日期:2004.2
Triphenylphosphane (TPP) has been utilized as a novel and efficient catalyst for the Knoevenagelcondensation of aldehydes with acidic methylene compounds such as ethyl cyanoacetate and malononitrile to afford substituted olefins. The reaction proceeds smoothly under mild and solvent-free conditions and the products are obtained in excellent yields with an E-geometry. This method is applicable for
A Simple, Efficient and Green Procedure for Knoevenagel Condensation in Water or under Solvent-free Conditions
作者:Ya-Qin Yu、Zhong-Liang Wang
DOI:10.1002/jccs.201200391
日期:2013.3
1,4‐Diazabicyclo[2.2.2]octane was used as an efficient catalyst in the Knoevenagelcondensation reaction of various kinds of aromatic/aliphatic/heterocyclic/αβ‐unsaturated aldehydes and ketones with active methylene compounds. This is a convenient and rapid method for Knoevenagelcondensation, which affords the corresponding substituted electrophilic alkenes in excellent yields. The reaction condition
A Simple, Efficient and Green Procedure for the Knoevenagel Condensation of Aldehydes with N-Methylpiperazine at Room Temperature under Solvent-Free Conditions
作者:Chhanda Mukhopadhyay、Arup Datta
DOI:10.1080/00397910802029364
日期:2008.6.20
Abstract Knoevenagelcondensation of aromatic, aliphatic, and heteroaromatic aldehydes with active methylene compounds such as ethylcyanoacetate, malononitrile, and cyanoacetamide proceed very smoothly at room temperature by simply mixing the ingredients together undersolvent-freeconditions in the presence of N-methylpiperazine in excellent yields of the E-configured products.
摘要 芳香族、脂肪族和杂芳香族醛与活性亚甲基化合物如氰乙酸乙酯、丙二腈和氰基乙酰胺的 Knoevenagel 缩合在室温下非常顺利地进行,方法是在 N-甲基哌嗪的存在下,在无溶剂条件下简单地将这些成分混合在一起,收率非常好的 E 配置产品。