Now showing items 1-10 of 251
Acid and base catalysts in the hybrid silica sol-gel process
(Academic Press IncSan DiegoEUA, 1997)
Preparation of bifunctional mesoporous silica nanoparticles by orthogonal click reactions and their application in cooperative catalysis
(Wiley-VCH VerlagWeinheim, 2012-12)
The synthesis of bifunctional mesoporous silica nanoparticles is described. Two chemically orthogonal functionalities are incorporated into mesoporous silica by co-condensation of tetraethoxysilane with two orthogonally ...
Intramolecular Catalysis of Phosphodiester Hydrolysis by Two Imidazoles
(Amer Chemical SocWashingtonEUA, 2010)
Fast and efficient synthesis of pyrano[3,2-c]quinolines catalyzed by niobium(V) chloride
(Georg Thieme Verlag Kg, 2008-08-01)
A highly efficient two-step method for the synthesis of pyranoquinoline derivatives from imino-Diels-Alder reactions between aldimines and 3,4-dihydro-2H-pyran using niobium(V) chloride as catalyst under mild conditions ...
Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
(Elsevier Science, 2000-12)
Base-catalyzed elimination reactions were studied on MgO and alkali-modified MgO catalysts using 2-propanol as a probe reactant. The effect of the acid–base properties on the catalyst activity and selectivity was investigated ...
Uma perspectiva computacional sobre catálise enzimática
(Sociedade Brasileira de Química, 2008)
Enzymes are extremely efficient catalysts. Here, part of the mechanisms proposed to explain this catalytic power will be compared to quantitative experimental results and computer simulations. Influence of the enzymatic ...
Microwave Assisted Synthesis of ethyl-quinolon-4-one-3-carboxylates and Hydrolysis to quinolon-4-one-3-carboxylic Acids
(Bentham Science Publishers, 2014-05)
A fast and efficient microwave assisted synthesis of several ethyl-quinolon-4-one-3-carboxylates and quinolon- 4-one-3-carboxylic acids has been developed. The 3-carboethoxy quinolones are easily obtained in a one-pot ...
Alilação e crotilação catalítica e enantiosseletiva de aldeídosEnantioselective catalytic allylation and crotylation of aldehydes
(Sociedade Brasileira de Química, 2006)
Acid-Base Site Detection and Mapping on Solid Surfaces by Kelvin Force Microscopy (KFM)
(Amer Chemical SocWashingtonEUA, 2012)