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]
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
Hypervalent Iodine(III)-Catalyzed Epoxidation of β-Cyanostyrenes
作者:Saeesh R. Mangaonkar、Fateh V. Singh
DOI:10.1055/s-0039-1690621
日期:2019.12
radiations. The β-cyanoepoxides were isolated in good to excellent yields in a short reaction time. A convenient approach for the synthesis of β-cyanoepoxides is illustrated by iodine(III)-catalyzed epoxidation of electron-deficient β-cyanostyrenes, wherein the active catalytic iodine(III) species was generated in situ. The epoxidation of β-cyanostyrenes was performed using 10 mol% PhI as precatalyst in the
Behaviour of Some Activated Nitriles Toward Barbituric Acid, Thiobarbituric Acid and 3-Methyl-1-Phenylpyrazol-5-one
作者:H. Madkour、M. Mahmoud、M. Nassar、M. Habashy
DOI:10.3390/50500746
日期:——
The effect of some active methylene containing heterocyclic compounds, namely barbituricacid, thiobarbituric acid and 3-methyl-1-phenylpyrazol-5-one on a-cyano-3,4,5-trimethoxycinnamonitrile and ethyl a-cyano-3,4,5-trimethoxycinnamate (1a,b) was investigated. The structure of the new products was substantiated by their IR,1H-NMR and mass spectra.
Behaviour of Some Activated Nitriles Toward Barbituric, Thiobarbituric Acids and 3-Methyl-1-Phenylpyrazol-5-One
作者:H. M. F. Madkour、M. R. Mahmoud、M. H. Nassar、M. M. Habashy
DOI:10.1002/jccs.200000128
日期:2000.8
The effect of some active methylene containing heterocyclic compounds, namely barbituric, thiobarbituric acids and 3-mehtyl-1-phenylpyrazol-5-one on α-cyano-3,4,5-trimethoxycinnamonitrile and ethyl α-cyano-3,4,5-trimethoxycinnamate 1a,b was investigated. The structure of the new products was substantiated from their IR, 1H NMR and mass spectra.