Buscar
Mostrando ítems 51-60 de 247
Synthesis of new fluorous modular chiral ligand derivatives from amino alcohols and application in enantioselective carbon-carbon bond-forming alkylation reactions
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)
N-Trifluoracyl beta-chalcogeno amides and N-perfluoracyl beta-thio amide ligands were prepared by a simple and efficient reaction sequence. These new ligands were evaluated in palladium-catalyzed alkylation of rac-(E)-1, ...
Application of sulfonated nanoporous carbons as acid catalysts for Fischer esterification reactions
(Elsevier, 2015-06)
Heterogeneous acid catalysts were prepared by sulfonation of nanoporous carbons (NPCs). The NPCs were produced by pyrolysis of resorcinol-formaldehyde nanoporous resins (NPRs). The NPRs were synthesized as wet gels by ...
Effect of operating variables and kinetics of the lipase catalyzed transesterification of ethylene carbonate and glycerol
(MDPI AG, 2018-09-05)
Glycerol carbonate (GC) is a value-added product originating from the valorization of widely available glycerol (Gly), a side stream from the production of biodiesel. Here we approach the production of this chemical comparing ...
An NMR, IR and theoretical investigation of the methyl effect on conformational isomerism in 3-fluoro-3-methyl-2-butanone and 1-fluoro-3,3-dimethyl-2-butanone
(John Wiley & Sons LtdW SussexInglaterra, 2002)
Simulação e otimização do processo de produção de carbonato de glicerol
(Universidade Federal de São CarlosUFSCarCâmpus São CarlosEngenharia Química - EQ, 2020-12-16)
Sustainable chemistry is a research and engineering area that encourages the development of products and processes that reduce the use and generation of toxic substances where technological approaches to prevent pollution ...
A simple derivatization of multiwalled carbon nanotubes with nitroaromatics in aqueous media: Modification with nitroso/hydroxylamine groups
(ELSEVIER SCIENCE INC, 2011-02)
We report that GCE modified with MWCNTs can be derivatized by the nitroaromatic drug nitrendipine (NTD) ((RS)-ethyl methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate) simply by dipping the electrode ...
Comparison of conformations of diesters of stabilized phosphonium ylides in solution and in the crystal
(2009)
Computed bond lengths and angles of methyl ethyl and dimethyl triphenyl phosphonium ylidic diesters, 1b, c, respectively, are similar to those in the crystal, as for the diethyl ester, 1a, where both acyl oxygens are anti ...
Singlet Oxygen Formation during the Oxygen Reduction Reaction in DMSO LiTFSI on Lithium Air Battery Carbon Electrodes
(Wiley-VCH, 2019-11)
Formation of singlet oxygen,1O2, during the O2 electroreduction reaction (ORR) on carbon electrode in Lithium bis‐(tri‐fluoromethylsulfonyl)imide (LiTFSI) dimethyl sulfoxide (DMSO) electrolyte has been detected “in‐operando” ...