Results 101 to 110 of about 6,162 (180)
A reciclable bifuctional acid-base organocatalyst with ionic liquid character. The role of sites separation and spatial configuration on different condensation reaction [PDF]
, 2011 A series of bifunctional organic catalysts containing acid and basic sites with ionic liquid characteristics have been prepared and their catalytic activity and reaction coordinate for aldol and Knoevenagel condensations have been compared.
Avelino Corma +38 more
core +1 more source
CHIMIA, 2019 Here we highlight the potential of a series of ruthenium complexes with tridentate N,N,N pincer-type ligands featuring two pyridylidene amide (PYA) moieties in the ligand skeleton.
Philipp Melle, Martin Albrecht
doaj +1 more source
Armaghane Danesh Bimonthly Journal, 2011 Introduction & Objective: Alpha amylase is the most important decomposing enzyme in starch. Digestion and absorption of starch in the intestine can be prevented and also the blood sugar levels can be controlled by restrain and control of alpha amylase ...
M Najafian +4 more
doaj
Acta Crystallographica Section E: Crystallographic Communications, 2018 The title chalcone compounds, C27H18O (I) and C33H20O (II), were synthesized using a Claisen–Schmidt condensation. Both compounds display an s-trans configuration of the enone moiety.
Dian Alwani Zainuri +2 more
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(E)-1-(4-Aminophenyl)-3-(naphthalen-2-yl)prop-2-en-1-one
Acta Crystallographica Section E, 2011 The molecule of the title chalcone derivative, C19H15NO, exists in a trans configuration with respect to the C=C double bond. The molecule is slightly twisted with a dihedral angle of 6.12 (12)° between the benzene ring and the ...
Thawanrat Kobkeatthawin +3 more
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A model compound for pyridinechalcone-based multistate systems. Ring opening-closure as the slowest kinetic step of the multistate [PDF]
, 2019 UID/QUI/50006/2019. PTDC/QEQ-QFI/1971/2014. PTDC/QUI-COL/32351/2017. PTDC/QUI-QFI/30951/2017. grant no. 219201.Anthocyanins and related flavylium derivatives exist in aqueous solution as a pH-dependent mole fraction distribution of species (a ...
Alejo-Armijo, Alfonso +6 more
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SYNTHESIS OF CHALCONES VIA CLAISEN–SCHMIDT CONDENSATION REACTION CATALYZED BY SILICA-H2SO4 UNDER ULTRASOUND IRRADIATION [PDF]
, 2014 The synthesis of 1,3-diaryl-2-propenones was carried out by using ultrasonic irradiation in the presence of silica-H2SO4, which was used as a catalyst in solvent-free conditions.
Chtourou, Manef +3 more
core +1 more source
RSC Advances, 2019 An aerobic coupling of 2-aminopyrimidines or 2-aminopyridines with trans-chalcones to afford aroylimidazo[1,2-a]pyrimidines and aroylimidazo[1,2-a]pyridines is reported.
Oanh T. K. Nguyen +6 more
openaire +3 more sources
(E)-1-(4-Aminophenyl)-3-(pyridin-3-yl)prop-2-en-1-one
Acta Crystallographica Section E, 2011 The title chalcone derivative, C14H12N2O, consists of 4-aminophenyl and pyridine rings bridged by a prop-2-en-1-one unit and exists in a trans configuration with respect to the C=C double bond. The molecule is slightly twisted with a dihedral angle of 29.
Suchada Chantrapromma +4 more
doaj +1 more source
Trans-chalcone suppresses tumor growth mediated at least in part by the induction of heme oxygenase-1 in breast cancer. [PDF]
Toxicol Res, 2021 Komoto TT +6 more
europepmc +1 more source