Showing 1-30 of 40 results for "131652"
G Pitsevich et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 120, 585-594 (2014-01-01)
FTIR spectra of pyridine N-oxide and trichloroacetic acid H-bonded complex in acetonitrile were studied at 20 and 50°C. The calculations of equilibrium configurations of the complex and their IR spectra in harmonic- and anharmonic approximations were carried out at the...
Paulina Mech et al.
The journal of physical chemistry. A, 124(3), 538-551 (2019-12-21)
Pyridine, its N-oxide, and their derivatives are exciting classes of organic bases. These compounds show widespread biological activity, and they are often used in synthesis. In this work results on theoretical calculations of acid dissociation constants as pKa of pyridine...
Scott K Koehn et al.
Journal of the American Chemical Society, 132(1), 390-395 (2009-12-17)
The gas phase stability of carbanions centered at various positions on pyridine N-oxide were investigated by computational and experimental methods. In addition, G3MP2 computations were completed on ring-deprotonated pyridine and N-methylpyridinium. With these species, the effect of a nitrogen-centered positive...
Highly efficient gold nanoparticle catalyzed deoxygenation of amides, sulfoxides, and pyridine N-oxides.
Yusuke Mikami et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 17(6), 1768-1772 (2011-01-29)
Michal Liberka et al.
Molecules (Basel, Switzerland), 25(2) (2020-01-16)
The combinations of Co(II), octacyanidotungstate(V), and monodentate pyridine N-oxide (pyNO) or 4-phenylpyridine N-oxide (4-phpyNO) led to crystallization of novel crystalline phases {CoII[CoII8(pyNO)12(MeOH)12][WV(CN)8]6} (1) and {CoII[CoII8(4-phpyNO)7(MeOH)17][WV(CN)8]6}·7MeOH·(4-phpyNO)3 (2). In both architectures, metal-cyanide clusters are coordinated by N-oxide ligands in a simple monodentate...
Fang Zhang et al.
Organic letters, 14(21), 5618-5620 (2012-10-20)
The unprecedented substitution of a nitro group with aryl or alkenyl groups of Grignard reagents affords 2-aryl or alkenylpyridine N-oxides in modest to high yields with high chemoselectivity. This protocol allows a simple and clean synthesis of various 2-substituted pyridine...
Christian Becker et al.
Analytical and bioanalytical chemistry, 412(1), 171-179 (2019-12-14)
Many gas chromatography-flame ionization detection (GC/FID) studies are dealing with response behavior of analytes such as alcohols and alkanes. Studies in the field of liquid chromatography (LC)/FID mainly focused on volatile analytes. In contrast, studies on LC/FID by conveyor type...
Mervat M Omran et al.
Frontiers in oncology, 10, 1348-1348 (2020-09-26)
Imatinib mesylate (IM) is highly efficacious in the treatment of chronic myeloid leukemia (CML). Therapeutic drug monitoring and pharmacogenetic screening are affirmed for better management of IM therapy. The goal of this study was to gain a greater mechanistic understanding...
Takahiko Kojima et al.
Journal of the American Chemical Society, 133(44), 17901-17911 (2011-09-29)
Ruthenium(II)-acetonitrile complexes having η(3)-tris(2-pyridylmethyl)amine (TPA) with an uncoordinated pyridine ring and diimine such as 2,2'-bipyridine (bpy) and 2,2'-bipyrimidine (bpm), [Ru(II)(η(3)-TPA)(diimine)(CH(3)CN)](2+), reacted with m-chloroperbenzoic acid to afford corresponding Ru(II)-acetonitrile complexes having an uncoordinated pyridine-N-oxide arm, [Ru(II)(η(3)-TPA-O)(diimine)(CH(3)CN)](2+), with retention of the coordination...
Jia Zeng et al.
Journal of bioscience and bioengineering, 114(5), 497-499 (2012-07-06)
A new N-oxide was produced from 3-(N-Boc-aminomethyl)-5-bromopyridine by bioconversion with Cunninghamella echinulata var. elegans ATCC 9245, and its structure was established based on the spectral data. The microbial N-oxidation is efficient and highly selective. The substrate was transformed into the...
Induction of the alcohol-inducible form of cytochrome P-450 by nitrogen-containing heterocycles: effects on pyridine N-oxide production.
R F Novak et al.
Drug metabolism reviews, 20(2-4), 781-792 (1989-01-01)
Wei Liu et al.
Organic letters, 15(18), 4682-4685 (2013-09-12)
A highly efficient protocol for C-H/C-H cross-coupling has been found to occur between 2-aryl-1,2,3-triazole N-oxides and pyridine N-oxide derivatives. In addition, two homocoupling reactions of 2-substituted 1,2,3-triazole N-oxides and some pyridine N-oxide derivatives were developed. A possible pathway of C-H/C-H...
Jonita Stankevičiūtė et al.
Scientific reports, 6, 39129-39129 (2016-12-17)
Pyridinols and pyridinamines are important intermediates with many applications in chemical industry. The pyridine derivatives are in great demand as synthons for pharmaceutical products. Moreover, pyridines are used either as biologically active substances or as building blocks for polymers with...
Allyn T Londregan et al.
Organic letters, 13(7), 1840-1843 (2011-03-08)
A general and facile one-pot procedure for the synthesis of 2-substituted pyridines from the corresponding pyridine-N-oxides and nucleophiles is presented as a mild alternative to S(N)Ar chemistry. A variety of nucleophiles and heterocyclic-N-oxides participate effectively in this transformation, which uses...
Begoña Verdejo et al.
Journal of the American Chemical Society, 131(9), 3178-3179 (2009-02-17)
The incorporation of four carboxylic acids or four amino groups to the upper rim of an aryl extended calix[4]pyrrole produces water-soluble receptors which are able to effectively bind aromatic N-oxides in water by a combination of hydrogen bonding, pi-pi, CH-pi...
Yichen Tan et al.
Journal of the American Chemical Society, 134(8), 3683-3686 (2012-02-09)
Direct arylations of pyridine N-oxide (PyO), a convenient method to prepare 2-arylpyridines, catalyzed by Pd(OAc)(2) and PtBu(3) have been proposed to occur by the generation of a PtBu(3)-ligated arylpalladium acetate complex, (PtBu(3))Pd(Ar)(OAc) (1), and the reaction of this complex with...
Hideo Okamura et al.
Ecotoxicology (London, England), 21(4), 1102-1111 (2012-02-22)
Copper pyrithione (CuPT(2)) and zinc pyrithione (ZnPT(2)) are two popular antifouling agents that prevent biofouling. Research into the environmental effects of metal pyrithiones has mainly focused on aquatic animal species such as fish and crustaceans, and little attention has been...
Jan Balzarini et al.
The Journal of antimicrobial chemotherapy, 55(2), 135-138 (2005-01-15)
Pyridine N-oxide derivatives represent a new class of anti-HIV compounds, for which some members exclusively act through inhibition of HIV-1 reverse transcriptase and thus characteristically behave as non-nucleoside reverse transcriptase inhibitors. Other members act, additionally or alternatively, at a post-integrational...
Pharmacokinetics of sorafenib in patients with renal impairment undergoing hemodialysis.
R A Hilger et al.
International journal of clinical pharmacology and therapeutics, 47(1), 61-64 (2009-02-11)
Alessandro Livieri et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 18(37), 11662-11668 (2012-08-01)
Asymmetric reactions involving (E)-3-aryl-1-(pyridin-2-yl-N-oxide)prop-2-en-1-ones and cyclic enol silyl ethers show good yields and excellent enantioselectivities (up to 99.9 % ee) when catalysed by bis(oxazoline)-Cu(II) complexes. Different reaction pathways can be followed by different enol silyl ethers: with 2-(trimethylsilyloxy)furan, a Mukaiyama-Michael adduct...
Ming-Hua Zheng et al.
Journal of fluorescence, 22(6), 1421-1424 (2012-06-28)
A series of 2-(N-oxide pyridyl)-5-methoxythiazoles were synthesized and corresponding optical properties were also investigated. It is first found that a digital-type fluorescent responses in a sharp pH variation with dual-emission could be fulfilled based on a small fluorophore.
Takako Muraoka et al.
Dalton transactions (Cambridge, England : 2003), 49(16), 5100-5107 (2020-03-27)
A pyridine-stabilized silanonetungsten complex Cp*(OC)2W{O[double bond, length as m-dash]SiMes2(py)}(SiMe3) (1b, Cp* = η5-C5Me5, Mes = 2,4,6-Me3C6H2, py = C5H5N) was obtained by the reaction of a silyl(silylene) complex Cp*(OC)2W([double bond, length as m-dash]SiMes2)(SiMe3) (3) with pyridine-N-oxide in pyridine. X-ray crystal...
Masahito Murai et al.
Chemical communications (Cambridge, England), 48(61), 7622-7624 (2012-06-26)
Gold(I)-catalysed tandem oxygen-transfer/cycloisomerisation reaction of 2-(2-propynyl)pyridine N-oxides provides an atom-economical route to indolizinone frameworks.
Tonny Studsgaard Petersen et al.
Reproduction (Cambridge, England), 150(1), 11-20 (2015-04-12)
Phosphodiesterases (PDEs) are important regulators of the intracellular cAMP concentration, which is a central second messenger that affects a multitude of intracellular functions. In the ovaries, cAMP exerts diverse functions, including regulation of ovulation and it has been suggested that...
Munawar Hussain et al.
Organic letters, 15(1), 54-57 (2012-12-22)
The synthesis of optically active piperidines by enantioselective addition of aryl Grignard reagents to pyridine N-oxides and lithium binolate followed by reduction is reported for the first time. The reaction results in high yields (51-94%) in combination with good ee...
Lei Liang et al.
Organic letters, 11(15), 3294-3297 (2009-07-04)
N-arylation of imidazoles with aryl halides catalyzed by a combination of copper(II) sulfate and 1,2-bis(2-pyridyl)-ethane-N,N'-dioxide in water afforded up to 95% yield.
Xue Gong et al.
Organic letters, 13(7), 1766-1769 (2011-03-11)
A Pd(II)-catalyzed oxidative coupling between pyridine N-oxides and N-substituted indoles via 2-fold C-H bond activation was achieved with high selectivity using Ag(2)CO(3) as an oxidant.
Veronika Biricová et al.
Journal of pharmaceutical and biomedical analysis, 56(3), 505-512 (2011-07-16)
Polyamidoamine dendrimers (PAMAMs) of generations 1 (G1) and 4 (G4) were conjugated with a bifunctional pyridine-N-oxide DOTA analog, 10-[(4-carboxy-1-oxidopyridin-2-yl)methyl]-1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid (H(4)do3a-py(NO-C)), through the pyridine-4-carboxylic acid group, and the conjugates were radiolabeled with indium-111. Reaction conditions for the radiolabelling were optimized....
Junchao Tong et al.
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 37(11), 3635-3639 (2016-09-22)
In a recent clinical trial, the drug BIA 10-2474, a putative fatty acid amide hydrolase(FAAH) inhibitor, was responsible for severe adverse events (SAEs), including one death. To date, there has been little reliable information divulged about the potency of BIA...
Robert P Farrell et al.
Organic letters, 15(1), 168-171 (2012-12-14)
A process for the regioselective amination of unsymmetrical 3,5-substituted pyridine N-oxides has been developed utilizing cheap, readily available saccharin as an ammonium surrogate. High conversions of the corresponding saccharin adducts have been achieved under mild reaction conditions. In situ deprotection...

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