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" no prazo de Papéis
S I Klimarev et al.
Aviakosmicheskaia i ekologicheskaia meditsina = Aerospace and environmental medicine, 47(2), 37-41 (2013-07-03)
The article presents a possible design of an atmosphere revitalization system (ARS) as a component part of a new generation life support system (LSS). The main goal of the test investigation was to block formation of solid hard-to-remove carbon as
Elisaveta Mladenova et al.
Journal of separation science, 35(10-11), 1249-1265 (2012-06-27)
A simple classification of various sorbents and solid-phase extraction procedures used for preconcentration of trace levels of Au, Pd, and Pt from different sample types is proposed in this review article. The large variety of available sorbents/procedures has been organized
Xiao-Feng Wu et al.
ChemSusChem, 6(2), 229-241 (2013-01-12)
Palladium-catalyzed coupling reactions have become a powerful tool for advanced organic synthesis. This type of reaction is of significant value for the preparation of pharmaceuticals, agrochemicals, as well as advanced materials. Both, academic as well as industrial laboratories continuously investigate
Ling Li et al.
Nature chemistry, 5(7), 607-612 (2013-06-22)
The development of transition metal-catalysed cross-coupling reactions has greatly influenced the manner in which the synthesis of complex organic molecules is approached. A wide variety of methods are now available for the formation of C(sp(2))-C(sp(2)) bonds, and more recent work
V Volarevic et al.
Journal of B.U.ON. : official journal of the Balkan Union of Oncology, 18(1), 131-137 (2013-04-25)
As novel therapeutic agents relevant to colon cancer therapy are explored continuously, we tested 4 R2edda-type ligand precursors O,O'-dialkyl esters of (S,S)-ethylenediamine-N,N'-di-2-(4-methyl)pentanoic acid (L1.2HCl-L4.2HCl) and corresponding palladium(II) and platinum(II) complexes against the human colon cancer cell lines CaCo-2, SW480 and
Gary A Molander et al.
The Journal of organic chemistry, 78(8), 4123-4131 (2013-04-11)
A method has been developed for the Pd-catalyzed synthesis of α-(hetero)aryl esters and amides through a Suzuki-Miyaura cross-coupling reaction. This method avoids the use of strong base, does not necessitate inert or low temperature formation of reagents, and does not
Palladium(II)-catalyzed alkene functionalization via nucleopalladation: stereochemical pathways and enantioselective catalytic applications.
Richard I McDonald et al.
Chemical reviews, 111(4), 2981-3019 (2011-03-25)
Qing-An Chen et al.
Chemical Society reviews, 42(2), 497-511 (2012-11-10)
The transition metal catalyzed asymmetric hydrogenation of unsaturated compounds arguably presents one of the most attractive methods for the synthesis of chiral compounds. Over the last few decades, Pd has gradually grown up as a new and popular metal catalyst
A K Grekhova et al.
Biomeditsinskaia khimiia, 59(1), 107-114 (2013-05-09)
A comparative study on the genotoxic activity of cisplatin versus morfozol, the first representative of a new class of cation-anion complexes of palladium [AH]2[PdCl4] (where A-methylmorpholine) has been performed using human lymphocytes in vitro. The results of the DNA-DNA cross-linking
Sylwester Kurcoń et al.
The Journal of organic chemistry, 78(8), 4115-4122 (2013-04-03)
Heptamethyl cobyrinate was transformed into hexamethyl 8-nor-cobyrinate. The crucial step involved the synthesis of new, vitamin B12 derived cobryketone via palladium-catalyzed cleavage of the sp(3)-sp(3) carbon-carbon bond with the liberation of the ketone. The replacement of sp(3) carbon atom with
Pazhamalai Anbarasan et al.
Chemical Society reviews, 40(10), 5049-5067 (2011-04-30)
The palladium-catalyzed cyanation of Ar-X (X = I, Br, Cl, OTf, and H) allows for an efficient access towards benzonitriles. After its discovery in 1973 and following significant improvements in recent decades, this methodology has become nowadays the most popular
Sandeep N Raikar et al.
The Journal of organic chemistry, 78(8), 3832-3846 (2013-03-26)
Cu-catalyzed three-component coupling of imines with benzoyl chloride and terminal arylalkynes followed by enyne ring-closing metathesis (RCM) and Heck cyclization afforded medicinally relevant benzoindolines, cyclopropane-fused indenopyridines, pyrroloquinolines, or 1,7-tetrahydrophenanthrolines via divergent cyclization pathways. Unexpectedly, the Pd-catalyzed cyclization of heterocyclic dienes
Kiyofumi Inamoto
Chemical & pharmaceutical bulletin, 61(10), 987-996 (2013-10-04)
Herein, we describe our development of synthetic methods for heterocyclic compounds based on the palladium-catalyzed carbon-hydrogen bond (C-H) functionalization/intramolecular carbon-heteroatom (nitrogen or sulfur) bond formation process. By this C-H cyclization method, we efficiently prepared various N-heterocycles, including indazoles, indoles, and
Daniel Smykowski et al.
Journal of molecular graphics & modelling, 41, 89-96 (2013-03-21)
This study is the analysis of the adsorption process of the CO2 molecule on the cationic sites of the DOH zeolite. Based on the DFT method, we have been able to identify several adsorption sites containing extra-framework cations and evaluate
Abdellatif Essoumhi et al.
Journal of nanoscience and nanotechnology, 14(2), 2012-2023 (2014-04-23)
This review reports on the recent advances in the synthesis and physico-chemical properties of palladium-containing perovskites. Initially, the perovskite structure is briefly reviewed, then palladium-containing perovskites synthesis and physico-chemical properties are detailed. The applications of palladium-containing perovskites in catalysis; namely
Stephan Enthaler et al.
Chemical Society reviews, 40(10), 4912-4924 (2011-06-07)
The formation of oxygen-carbon bonds is one of the fundamental transformations in organic synthesis. In this regard the application of palladium-based catalysts has been extensively studied during recent years. Nowadays it is an established methodology and the success has been
Amar B Karki et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(23), 9283-9288 (2013-05-22)
The attractive/repulsive relationship between superconductivity and magnetic ordering has fascinated the condensed matter physics community for a century. In the early days, magnetic impurities doped into a superconductor were found to quickly suppress superconductivity. Later, a variety of systems, such
Meng Wang et al.
Organic & biomolecular chemistry, 11(16), 2574-2577 (2013-03-15)
A novel Pd/Cu catalyzed domino reaction for the synthesis of functionalized pyrrolo[1,2-b]pyridazines from readily accessible (hetero)aryl propargyl alcohols and 1-amino-2-bromopyrroles was developed. This cascade process involves a Sonogashira cross-coupling reaction, an isomerization and an intramolecular condensation.
Z Y Bian et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 67(8), 1873-1879 (2013-04-13)
A Pd/C gas-diffusion cathode which generated H2O2 through a two-electron reduction process of fed oxygen molecule was used to degrade 4-chlorophenol in an undivided electrolysis device. The kinetics of 4-chlorophenol degradation has been investigated by the electrochemical oxidation processes. By
Izabela Czekaj et al.
Chimia, 67(4), 271-274 (2013-08-24)
This research is focused on the analysis of adsorbed CH4 intermediates at oxidized Pd9 nanoparticles supported on gamma-alumina. From first-principle density functional theory (DFT) calculations, several configurations, charge transfer and electronic density of states have been analyzed in order to
Eduardo J García-Suárez et al.
Recent patents on nanotechnology, 7(3), 247-264 (2012-09-06)
In the last fifteen-years, the application of metal nanoparticles as catalysts in organic synthesis has received a renewed interest. Therefore, much attention is currently being paid to the synthesis of metal nanoparticles in order to achieve the control of their
Maryam Ghanbarian et al.
Journal of AOAC International, 96(4), 880-886 (2013-09-05)
A new displacement-dispersive liquid-liquid microextraction method based on the solidification of floating organic drop was developed for separation and preconcentration of Pd(ll) in road dust and aqueous samples. This method involves two steps of dispersive liquid-liquid microextraction based on solidification.
Synthesis of heterocycles via palladium-catalyzed carbonylations.
Xiao-Feng Wu et al.
Chemical reviews, 113(1), 1-35 (2012-10-09)
Keary M Engle et al.
The Journal of organic chemistry, 78(18), 8927-8955 (2013-04-10)
Homogeneous transition-metal-catalyzed reactions are indispensable to all facets of modern chemical synthesis. It is thus difficult to imagine that for much of the early 20th century, the reactivity and selectivity of all known homogeneous metal catalysts paled in comparison to
Anton V Dubrovskiy et al.
Combinatorial chemistry & high throughput screening, 15(6), 451-472 (2012-01-26)
The iodocyclization of functionally-substituted alkynes provides an excellent way to prepare a wide range of iodoheterocycles, which can then be readily elaborated through palladium-catalyzed Suzuki-Miyaura, Sonogashira, Heck, Hartwig-Buchwald, and carbonylation processes into libraries of medicinally relevant heterocycles. The synthesis of
Update 1 of: Synthesis and functionalization of indoles through palladium-catalyzed reactions.
Sandro Cacchi et al.
Chemical reviews, 111(5), PR215-PR283 (2011-05-12)
Feng Zhao et al.
Organic letters, 15(7), 1520-1523 (2013-04-06)
A palladium-catalyzed approach for the synthesis of diarylmethanes from sodium sulfinates and benzyl chlorides is described. Various aromatic sodium sulfinates were used as aryl sources via extrusion of SO2 and gave the diarylmethanes in moderate to good yields.
Kathrin Ulbrich et al.
The Journal of organic chemistry, 78(8), 4202-4206 (2013-04-03)
Racemic 4-hydroxycyclopentenone, readily derived from furfuryl alcohol, can be transformed via its O-Boc derivative to 4-acyloxy, 4-aryloxy-, 4-amino-, or 4-thio-substituted cyclopentenones with high enantioselectivity by palladium-catalyzed kinetic resolution via nucleophilic allylic substitutions. Applying this methodology, a short formal synthesis of
Stefano Nicolai et al.
The Journal of organic chemistry, 78(8), 3783-3801 (2013-03-21)
Tetrahydrofurans and pyrrolidines are among the most important heterocycles found in bioactive compounds. Cyclization-functionalization domino reactions of alcohols or amines onto olefins constitute one of the most efficient methods to access them. In this context, oxy- and aminoalkynylation are especially
Amanda J Hickman et al.
Nature, 484(7393), 177-185 (2012-04-14)
Copper and palladium catalysts are critically important in numerous commercial chemical processes. Improvements in the activity, selectivity and scope of these catalysts could drastically reduce the environmental impact, and increase the sustainability, of chemical reactions. One rapidly developing strategy for
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