- Green and selective toluene oxidation–Knoevenagel-condensation domino reaction over Ce- and Bi-based CeBi mixed oxide mixtures
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Both Bi- and Ce-based CeBi mixed oxides were prepared by a modified sol-gel process from their precursor salts. The mixed as well as the parent oxides were characterized by X-ray diffractometry, Raman, XPS, UV–DRS and X-ray photoelectron spectroscopies, ICP–OES method, scanning and transmission electron microscopies as well as BET surface area, CO2- and NH3-temperature-programmed desorption measurements. After characterizing the morphology, the acid-base properties, the oxidation states of the cationic components and the porosity of these structures, their catalytic activities were probed in the Koevenagel condensation of benzaldehyde and diethyl malonate and the toluene oxidation to benzaldehyde reactions. Based on the catalytic activities of the oxides in the individual reactions, a catalyst mixture from the Bi- and Ce-based mixed oxides was used successfully in the toluene to benzaldehyde oxidation and benzaldehyde to benzylidene malonate Knoevenagel condensation domino reaction under environmentally benign conditions.
- Varga, Gábor,Kukovecz, ákos,Kónya, Zoltán,Sipos, Pál,Pálinkó, István
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p. 308 - 315
(2019/11/29)
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- New compounds having skin whitening activity and medical use thereof
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The present invention relates to novel compounds having skin whitening activity and a medical use thereof, wherein the novel compounds are represented by chemical formula 1. The compounds according to the present invention have skin whitening activity tha
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Paragraph 0070-0076
(2017/11/23)
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- PROCESS FOR THE PREPARATION OF AN ARYL OXIME AND SALTS THEREOF
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The invention relates to a process for the preparation of 3-cyano-3-{4-[(4-{[(2Z)-2-(methoxyimino)-2-phenylethyl] oxy} benzyl) oxy] phenyl} propanoic acid or salts thereof. In one form, the invention relates to the process for the preparation of (-)-3-cyano-3-{4-[(4-{[(2Z)-2-(methoxyimino)-2-phenylethyl]oxy}benzyl)oxy]phenyl}propanoic acid and conversion of the (-)-enantiomer to the sodium salt, sodium 3-cyano-3-{4-[(4-{[(2Z)-2-(methoxyimino)-2-phenylethyl]oxy}benzyl)oxy] phenyl}propanoate.
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Page/Page column 25; 26
(2013/05/09)
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- AGONISTS OF GPR40
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The present invention relates to compounds that have the ability to modulate the activity of GPR40 and are there-fore useful in the treatment of GPR40 related disorders. In addition the invention relates to the compounds, methods for their preparation, pharmaceutical compositions containing the compounds and the uses of these compounds in the treatment of certain disorders related to GPR40 activity.
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Page/Page column 77-78
(2012/02/05)
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- First bovine serum albumin-promoted synthesis of enones, cinnamic acids and coumarins in ionic liquid: An insight into the role of protein impurities in porcine pancreas lipase for olefinic bond formation
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During studies on exploiting the catalytic promiscuity of crude porcine pancreas lipase (PPL) in ionic liquid for C=C bond formations, bovine serum albumin (BSA) was found to be competing for these reactions. After a detailed investigation, we establish that these transformations are possible by unspecific protein catalysis rather than catalytic promiscuity of "PPL" - a first insight into the role of protein impurities in crude enzyme. Thus, a novel and highly efficient, environmentally friendly approach involving synergistic catalysis by bovine serum albumin-1-butyl-3- methylimidazolium bromide (BSA-[bmim]Br) has been developed for the synthesis of (E)-α,β-unsaturated compounds including a one-pot cascade synthesis of cinnamic acids and coumarins via aldol, Knoevenagel and Knoevenagel-Doebner condensations.
- Sharma, Nandini,Sharma, Upendra K.,Kumar, Rajesh,Katoch, Nidhi,Kumar, Rakesh,Sinha, Arun K.
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scheme or table
p. 871 - 878
(2011/06/19)
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- Chromophore Coated Metal Oxide Particles
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The invention provides coated metal oxide particles, wherein metal oxide particles are coated with at least one type of crosslinkable chromophore with UV-A and/or UV-B and/or UV-C filter and/or broadband activity and optionally at least one type of crossl
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- Pyrazolidine-3,5-dione derivatives as potent non-steroidal agonists of farnesoid X receptor: Virtual screening, synthesis, and biological evaluation
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The identification of a novel pyrazolidine-3,5-dione based scaffold hit compound as Farnesoid X receptor (FXR) partial or full agonist has been accomplished by means of virtual screening techniques. A series of pyrazolidine-3,5-dione derivatives (1a-u and
- Deng, Guanghui,Li, Weihua,Shen, Jianhua,Jiang, Hualiang,Chen, Kaixian,Liu, Hong
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body text
p. 5497 - 5502
(2009/05/30)
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- NOVEL COMPOUNDS AS AGONIST FOR PPAR GAMMA AND PPAR ALPHA, METHOD FOR PREPARATION OF THE SAME, AND PHARMACEUTICAL COMPOSITION CONTAINING THE SAME
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The present invention relates to novel compounds accelerating the activity of Peroxisome proliferator-activated receptor gamma (PPARγ) and alpha (PPARα), processes of preparing the same, and pharmaceutical compositions containing the same as an active agent.
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Page/Page column 74
(2010/02/11)
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- An Efficient Knoevenagel Condensation Catalyzed by LaCl3.7H 2O in Heterogeneous Medium
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Knoevenagel condensation was carried out in absence of solvent with a mild Lewis acid Lanthanum(III) chloride, to prepare substituted alkenes. A systematic study of the reaction to establish the generality of the method has been undertaken with various aldehydes and active methylene compounds.
- Narsaiah, A. Venkat,Nagaiah
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p. 3825 - 3832
(2007/10/03)
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- Barbituric acid derivatives as inhibitors of TNF-alpha converting enzyme (TACE) and/or matrix metalloproteinases
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The present application describes novel barbituric acid derivatives of formula I: or pharmaceutically acceptable salt or prodrug forms thereof, wherein A, B, L, R1, R2, R3, R4, R5, n, W, U, X, Y, Z, U
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Page/Page column 42
(2008/06/13)
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- Microwave assisted synthesis of fungicidal compounds using Knoevenagel condensation in dry media
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An environmentally benign, solventless, rapid and economic technique for the synthesis of substituted quinolines, indoles and aromatic compounds using Knoevenagel condensation is described from readily available aromatic and heterocyclic aldehydes and die
- Kidwai, Mazaahir,Sapra, Pooja,Bhushan, Kumar Ranjan
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p. 596 - 598
(2007/10/03)
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- Knoevenagel condensation catalyzed by a Mexican bentonite using infrared irradiation
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Diethyl malonate undergoes condensation with aromatic aldehydes without solvents, in the presence of a Mexican bentonite using infrared irradiations as the energy source, to give the benzylidenemalonate compounds in fair yield.
- Delgado,Tamariz,Zepeda,Landa,Miranda,Garcia
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p. 753 - 759
(2007/10/02)
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- Aminobenzoic and aminocyclohexanecarboylic acid compounds, compositions, and their method of use
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Compounds of the formula inhibit the action of neutral endopeptidase. As a result, such compounds produce diuresis, natriuresis, and lower blood pressure as well as being useful in the treatment of congestive heart failure, relieving pain, and diarrhea when administered to a mammalian host.
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- PREPARATION AND SOME REACTIONS OF 4- AND 5-ARYL-4,5-DIHYDROPYRIDAZIN-3(2H)-ONES
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Efficient preparations of 4- and 5-phenyl-4,5-dihydropyridazin-3(2H)-ones have been developed, the main reactions of these compounds have been studied, and the synthetic routes have been used to give analogues with substituents in the phenyl rings.In the best synthesis of the 4-phenyldihyropyridazinone (72 percent overall yield) the product was obtained from phenylacetic acid by three simple stages.This approach was applied in preparations of the 2- and 4-hydroxyphenyl compounds and, in conjunction with a recent method for amine protection, the 4-aminophenyl analogue.A four stage synthesis starting from benzaldehyde gave the 5-phenyldihydropyridazinone in 47 percent overall yield; hydroxybenzaldehydes were similarly converted into 5-(allyloxyphenyl)dihydropyridazinones.Oxidation to phenylpyridazinones occured more readily with the 4- and 5-phenyldihydropyridazinones than with the 6-phenyl isomer.The 4- and 5-dihydropyridazinones were smoothly reduced to tetrahydropyridazinones by hydrogenation over platinum but were uneffected by palladium in the presence of hydrazine or cyclohexene.
- Breukelman, Stephen P.,Meakins, G. Denis
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p. 1627 - 1636
(2007/10/02)
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- CINETIQUE ET MECANISME DE LA REACTION DE KNOEVENAGEL DANS LE BENZENE-2 REACTION DU MALONITRILE ET DE LA (+) METHYL-3 CYCLOHEXANONE EN PRESENCE D'UNE AMINE PRIMARIE PURE ET DE SON MELANGE AVEC L'ACIDE ACETIQUE
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The kinetics of the reaction of (+)-3-methyl cyclohexanone with malonitrile were studied in benzene at 25 deg C, in the presence of hexylamine-acetic acid mixtures.Hexylamine gives an imine with cyclohexanone in an acid-catalyzed step.This imine then reacts quickly with malononitrile.A rate law of zero order in malononitrile is observed.Separate kinetic results obtained for the formation of the imine and for the imine-malonitrile reaction support this mechanism.Without acetic acid, a complex rate law is observed; hexylamine acts mainly as a basic catalyst.Primary amine-carboxylic acid was used as a catalyst in Knoevenagel reaction, often giving an increase in yield and a diminution in the reaction time compared with the more commonly used catalysts: piperidine, β-alanine, AcOH-AcONH4.
- Guyot, J.,Kergomard, A.
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p. 1167 - 1179
(2007/10/02)
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