Results 41 to 50 of about 8,721 (248)

A Copper(I) Catenane Decorated Metal-Organic Layer as a Heterogenous Catalyst for Dehydrogenative Cross-Coupling. [PDF]

Chemistry
Reported in this work is a metal‐organic layer decorated with a 2D array of catalytically active Cu(I) catenanes for dehydrogenative C─O coupling. Kinetic stabilization effects from the interlocked ligands not only preserve the structural integrity of the molecular Cu(I) catalyst for a straightforward attachment onto the solid support, but also ...
Shi YX, Zhu L, Doan HS, Deng Y, Mo X, Wang Y, Tse ECM, Au-Yeung HY.   +7 more
europepmc   +2 more sources

On the ordeal of quinolone preparation via cyclisation of aryl-enamines; synthesis and structure of ethyl 6-methyl-7-iodo-4-(3-iodo-4-methylphenoxy)-quinoline-3-carboxylate [PDF]

, 2017
Recent studies directed to the design of compounds targeting the bc(1) protein complex of Plasmodium falciparum, the parasite responsible for most lethal cases of malaria, identified quinolones (4-oxo-quinolines) with low nanomolar inhibitory activity ...
Bras, Elisa M., Cristiano, Maria De Lurdes, Fausto, Rui, Henriques, Marta S. C., Horta, Pedro, Murtinheira, Fernanda, Nogueira, Fatima, O'Neill, Paul M., Paixao, Jose A.   +8 more
core   +1 more source

Esterification of dicarboxylic acids to diesters over Mn+-montmoril lonite clay catalysts [PDF]

, 2005
Esterification of dicarboxylic acids with various alcohols and phenols in presence of metal exchanged montmorillonite clay catalyst (Mn+-mont; Mnþ ¼ Al3þ, Fe3+, Cr3+, Zn2+, Mn2+, and Ni2+) is studied.
Gopalpur Nagendrappa, ., Jai Prakash, B.S., Pushpa Iyengar, ., Ravindra Reddy, .   +3 more
core   +1 more source

Tricyclo[3,3,1,01,5]nonan-tetracarbonsäure-(3,3,7,7)-tetraäthylester, 3,7-Dithia-tricyclo[3,3,1,01,5]nonan und 3,7-Dithia-tricyclo[3,3,2,01,5]decan

CHIMIA, 1968
The compound II is obtained by condensation of the tetramesylate Ic with sodium diethyl malonate in toluene. The dithiacompounds III and V are formed by refluxing of Ic respectively 1,1,2,2-tetrakis-hydroxymethyl-cyclobutane-tetramesylate with Na2S ∙ 9 ...
Emil Buchta, Arno Kröniger
doaj   +1 more source

Boron in My Mind: A Comprehensive Review of the Evolution of the Diverse Syntheses of 4-Borono-l-Phenylalanine, the Leading Agent for Boron Neutron Capture Therapy. [PDF]

ChemMedChem
Boron Neutron Capture Therapy is a promising technique for treating “untreatable” brain cancers by having 10B nuclei absorb neutrons and then decay to 7Li destroying the cells they are in. The dominant clinical agent is 4‐borono‐l‐phenylalanine, and this review comprehensively analyzes all of its reported patent and literature syntheses to help ...
Ahmad S, Pan M, Hayward JJ, Sementilli M, Porter LA, Trant JF.   +5 more
europepmc   +2 more sources

Kinetics of the base-catalysed bromination of diethyl malonate [PDF]

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1946
The kinetics of the bromination of diethyl malonate have been investigated in aqueous solution at 25°. Under suitable conditions the rate of bromination is independent of the bromine concentration, and is determined by the rate at which the ester loses a proton to basic ions or molecules in the solution.
Douglas Hugh Everett, Ronald Percy Bell, Hugh Christopher Longuet-Higgins   +2 more
openaire   +2 more sources

Synthesis and Activity of Six-Membered Cyclic Alkyl Amino Carbene–Ruthenium Olefin Metathesis Catalysts [PDF]

, 2020
Ru–cyclic alkyl amino carbene (Ru–CAAC) olefin metathesis catalysts perform extraordinarily in metathesis macrocyclization and ethenolysis, but previous studies have been limited to the use of five-membered CAAC (CAAC-5) ligands.
Grubbs, Robert H., Samkian, Adrian E., Virgil, Scott C., Xu, Yan, Yoon, Ki-Young   +4 more
core  

Synthesis and evaluation of new guanidine-thiourea organocatalyst for the nitro-Michael reaction: Theoretical studies on mechanism and enantioselectivity

Beilstein Journal of Organic Chemistry, 2012
A new guanidine-thiourea organocatalyst has been developed and applied as bifunctional organocatalyst in the Michael addition reaction of diethyl malonate to trans-β-nitrostyrene.
Tatyana E. Shubina, Matthias Freund, Sebastian Schenker, Timothy Clark, Svetlana B. Tsogoeva   +4 more
doaj   +1 more source

Ethyl (1,3-diphenyl-1H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-yl)acetate

Molbank, 2011
Novel ethyl (1,3-diphenyl-1H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-yl)acetate (5), was prepared via heating of 5-amino-1,3-diphenyl-4,5-dihydro-4-imino-1H-pyrazolo[3,4-d] pyrimidine (1) and diethyl malonate (2) under reflux.
Sobhi M. Gomha, Thoraya A. Farghaly
doaj   +1 more source

Chiral benzimidazoles as hydrogen bonding organocatalysts [PDF]

, 2015
Several bifunctional organocatalysts bearing the benzimidazole unit have been designed in order to act as bifunctional systems by hydrogen bonding. Chiral 2-aminobenzimidazoles are conformational rigid guanidines able to catalyze enantioselectively ...
Nájera, Carmen, Yus, Miguel
core   +2 more sources