Citations with the tag: HALOALKANES

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  • Synthesis of 4-alkyl(aryl, hetaryl)-2-thioxo-5,6,7,8-tetrahydroquinoline-3-carbonitriles and their derivatives by cross-recyclization of 4-alkyl(aryl, hetaryl)-2,6-diamino-4 H-thiopyran-3,5-dicarbonitriles with 4-(cyclohex-1-en-1-yl)-morpholine,...
    Dyachenko, V. D.; Dyachenko, A. D. // Russian Journal of Organic Chemistry; Mar2008, Vol. 44 Issue 3, p412 

    Cross recyclization of 4-substituted 2,6-diamino-4 H-thiopyran-3,5-dicarbonitriles with 4-(cyclohex-1-en-1-yl)morpholine, alkyl halides, and cyclohexanone gave the corresponding substituted 2-thioxo-1,2,5,6,7,8-hexahydroquinoline-3-carbonitriles,...

  • Unexpectedly different reactions of [(arene)Mn(CO)3]+ cations (arene = trindane, indane, tetralin, or dibenzosuberane) with potassium t-butoxide � C-H insertions, haptotropic shifts, dimerization, or elimination.
    Reginato, Nada; Harrington, Laura E.; Ortin, Yannick; McGlinchey, Michael J. // Canadian Journal of Chemistry; Jan2009, Vol. 87 Issue 1, p232 

    [(?6-Trindane)Mn(CO)3][BF4] (1) reacts with tert-BuOK in THF in the presence of alkyl halides (CH2=CHCH2Br, CH3I) to yield the corresponding (?6-C15H18)Mn(CO)2X, where X = Br (3) or I (4). In contrast, 1 and tert-BuOK react, in the presence of a donor ligand, to generate (?5-C15H15)Mn(CO)2L,...

  • Antibacterial effect of composite resins containing quaternary ammonium polyethyleneimine nanoparticles.
    Yudovin-Farber, Ira; Beyth, Nurit; Weiss, Ervin I.; Domb, Abraham J. // Journal of Nanoparticle Research; Feb2010, Vol. 12 Issue 2, p591 

    Quaternary ammonium polyethyleneimine (QA-PEI)-based nanoparticles were synthesized by crosslinking with dibromopentane followed by N-alkylation with various alkyl halides and further N-methylation with methyl iodide. Insoluble pyridinium-type particles were prepared by suspension polymerization...

  • STUDY OF THE SYNTHESIS OF SOME ALKYL-AROMATIC DIOXIMES AND THEIR ANALYTICAL APPLICATIONS.
    Cirtina, D. // Journal of the University of Chemical Technology & Metallurgy; Dec2011, Vol. 46 Issue 4, p419 

    The synthesis of the alkyl- aromatic dioximes is of practical interest due to the complex potential determined by the presence in their structure of the oxymic groups, donor of electrons. Complexes formed by dioxime structures with transitional metals have a series of physical-chemical...

  • Cycloaddition of di(2-pyridyl) ditelluride to norbornene stimulated by antimony pentachloride.
    Borisov, A.; Matsulevich, Zh.; Osmanov, V.; Borisova, G.; Mammadova, G.; Maharramov, A.; Khrustalev, V. // Chemistry of Heterocyclic Compounds; Oct2012, Vol. 48 Issue 7, p1085 

    The interaction of norbornene with the di(2-pyridyl) ditelluride-antimony pentachloride system in methylene chloride proceeds with the formation of exo-9-telluro-3-azoniatetracyclo-[9.2.1.0.0]tetradeca-3(8),4,6-triene chloroantimonates(III), which are the products of polar cycloaddition of...

  • Carbon Tetrachloride: Using with caution.
    Verma, S. S. // Chemical Business; Oct2010, Vol. 24 Issue 10, p48 

    The article explores the applications of carbon tetrachloride. Also known as tetrachloromethane, carbon tetrachloride is considered a synthetic chemical that can be utilized in different applications with caution because of its toxicity. This chemical can be used as a dry cleaning solvent, a...

  • Development of an enzymatic fiber-optic biosensor for detection of halogenated hydrocarbons.
    Bidmanova, Sarka; Chaloupkova, Radka; Damborsky, Jiri; Prokop, Zbynek // Analytical & Bioanalytical Chemistry; Nov2010, Vol. 398 Issue 5, p1891 

    n enzyme-based biosensor was developed by co-immobilization of purified enzyme haloalkane dehalogenase (EC 3.8.1.5) and a fluorescence pH indicator on the tip of an optical fiber. Haloalkane dehalogenase catalyzes hydrolytic dehalogenation of halogenated aliphatic hydrocarbons, which is...

  • Mechanistic and dual-level direct dynamics studies on the reaction Cl + CH2FCl.
    Xiu-Juan Jia; You-Jun Liu; Jing-Yu Sun; Yi-Zhen Tang; Hao Sun; Li-Zhu Hao; Rong-Shun Wang; Xiu-Mei Pan // Theoretical Chemistry Accounts: Theory, Computation, & Modeling; Sep2009, Vol. 124 Issue 1/2, p105 

    Theoretical investigations are carried out on the reaction Cl + CH2FCl by means of direct dynamics method. The minimum energy path (MEP) is obtained at the MP2/6-311G(d, p) level. The energetic information is further improved by single-point energy calculations using QCISD(T)/6-311++G(d, p)...

  • Dynamics and hydration explain failed functional transformation in dehalogenase design.
    Sykora, Jan; Brezovsky, Jan; Koudelakova, Tana; Lahoda, Maryna; Fortova, Andrea; Chernovets, Tatsiana; Chaloupkova, Radka; Stepankova, Veronika; Prokop, Zbynek; Smatanova, Ivana Kuta; Hof, Martin; Damborsky, Jiri // Nature Chemical Biology; Jun2014, Vol. 10 Issue 6, p428 

    We emphasize the importance of dynamics and hydration for enzymatic catalysis and protein design by transplanting the active site from a haloalkane dehalogenase with high enantioselectivity to nonselective dehalogenase. Protein crystallography confirms that the active site geometry of the...

  • Chemical Constituents of Xylocarpus granatum.
    Wu, Yibing; Su, Jian; Ni, Zhiyu; Qi, Jinlong; Huo, Changhong; Dong, Mei; Sauriol, Francoise; Gu, Yucheng; Shi, Qingwen // Chemistry of Natural Compounds; Jul2014, Vol. 50 Issue 3, p549 

    The article presents information on the chemical constituents of a marine mangrove plant xylocarpus (X) granatum. Topics discussed include the purification of various compounds like xylomexicanin, xylogranatin, and hainangranatumin C from a dichloromethane extract of the seed of X. granatum....

  • A new approach for generic screening and quantitation of potential genotoxic alkylation compounds by pre-column derivatization and LC-MS/MS analysis.
    Van Wijk, A. M.; Beerman, B.; Niederländer, H. A. G.; Siebum, A. H. G.; De Jong, G. J. // Analytical & Bioanalytical Chemistry; Aug2011, Vol. 400 Issue 5, p1375 

    generic LC-MS/MS method was developed for the analysis of potentially genotoxic alkyl halides. A broad selection of alkyl halides were derivatized using 4-dimethylaminopyridine in acetonitrile. The reaction conditions for derivatization, i.e., solvent, reaction time, temperature and...

  • 4-Hydroxy-2-quinolones. 167*. Study of the reaction of ethyl 1-alkyl-substituted 4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylates with phosphorus oxychloride.
    Ukrainets, I. V.; Bereznyakova, N. L.; Davidenko, A. A.; Slobodzian, S. V. // Chemistry of Heterocyclic Compounds; Aug2009, Vol. 45 Issue 8, p952 

    Prolonged treatment of ethyl 1-alkyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylates with refluxing phosphorus oxychloride gives not only the target 4-chloro derivatives but is also accompanied by a marked loss of the 1-N-alkyl groups to form the side product...

  • New syntheses on the basis of ethyl 2-oxotetrahydrofuran-3-carboxylates.
    Kochikyan, T. V.; Arutyunyan, E. V.; Arutyunyan, V. S.; Avetisyan, A. A. // Russian Journal of Organic Chemistry; Jun2008, Vol. 44 Issue 6, p849 

    Alkylation of 5-substituted ethyl 5-methyl-2-oxotetrahydrofuran-3-carboxylates with alkyl halides in the presence of sodium ethoxide gave the corresponding 3-alkyl derivatives which were converted into 3,5-substituted 5-methyl- N-(4-nitrophenyl)-2-oxotetrahydrofuran-3-carboxamides and...

  • Synthesis and Characterization of Novel Pyridazinone derivatives with 5-Mercapto Tetrazole.
    Kumaran Kubendiran; Jaisankar Raguraman; S. Raja Mohamed Kamil; S. Syed Shafi // Asian Journal of Research in Chemistry; Dec2011, Vol. 4 Issue 12, p1915 

    A simple and efficient experimental procedure for the synthesis of novel pyridazinone derivatives containing 5- mercaptoTetrazole moiety was developed in the presence of several Aryl/alkyl halides and sodium hydride using Dry tetrahydrofuran (as a solvent). The structures of the newly...

  • Chemical constituents of Aglaia loheri.
    Consolacion Y, Ragasa; Oscar B., Torres; Shen Chien-Chang; Gayle R., Mejia Michelle; Joyce, Ferrer Regina; D., Jacinto Sonia // Pharmacognosy Journal; Nov/Dec2012, Vol. 4 Issue 32, p29 

    The dichloromethane extract of the leaves of Aglaia loheri afforded spinasterol (1), trilinolein (2) and phytyl fatty acid ester (3). The structures of 1-2 were identified by comparison of their 1°C NMR data with those reported in the literature. Compounds 1, 2 and 3 were evaluated for...

  • Isolation of stigmast-5-en-3β-ol (β-sitosterol) from dichloromethane extract of Sterculia setigera Leaves (Sterculiaceae).
    Babalola, Ibrahim T.; Adelakun, Esther A. // Archives of Applied Science Research; 2013, Vol. 5 Issue 5, p16 

    Ethnomedical survey of plants used for the treatment of tuberculosis in North Eastern Nigeria was undertaken primarily for the purpose of documentation and screening for possible drug leads. The leaves of Sterculia setigera has been implicated in the folkloric treatment of Tuberculosis by the...

  • Tracer concentration profiles measured in central London as part of the REPARTEE campaign.
    Martin, D.; Petersson, K. F.; White, I. R.; Henshaw, S. J.; Nickless, G.; Lovelock, A.; Barlow, J. F.; Dunbar, T.; Wood, C. R.; Shallcross, D. E. // Atmospheric Chemistry & Physics Discussions; 2009, Vol. 9 Issue 6, p25245 

    There have been relatively few tracer experiments carried out that have looked at vertical plume spread in urban areas. In this paper we present results from cyclic perfluorocarbon tracer experiments carried out in 2006 and 2007 in central London centred on the BT Tower as part of the REPARTEE...

  • Synthesis and hydroxylation of 1-alkyl- and 7-alkyl- 1,3,7-triazapyrenium salts.
    Pisarenko, S.; Demidov, O.; Aksenov, A.; Borovlev, I. // Chemistry of Heterocyclic Compounds; May2009, Vol. 45 Issue 5, p580 

    The regioselectivity of quaternization of 1,3,5-triazapyrenes by alkyl halides has been studied. Oxidative hydroxylation of 1-alkyl- and 7-alkyl-1,3,7-triazapyrenium salts gives 1-alkyl-1,2-dihydro-1,3,7-triazapyren-2-ones or 7-alkyl-6,7-dihydro-1,3,7-triazapyren-6-ones respectively. In the...

  • Phenolic Enriched Extract of Baccharis trimera Presents Anti-inflammatory and Antioxidant Activities.
    de Oliveira, Cristiane B.; Comunello, Lucimara N.; Lunardelli, Adroaldo; Amaral, Robson H.; Pires, Melissa G. S.; da Silva, Gabriela Lucas; Manfredini, Vanusa; Vargas, Carmen Regla; Gnoatto, Simone C. B.; de Oliveira, Jarbas R.; Gosmann, Grace // Molecules; Jan2012, Vol. 17 Issue 1, p1113 

    Baccharis trimera is a plant popularly used as a tea and to treat gastrointestinal diseases and inflammatory processes as well. The total phenolic content was determined and the antioxidant and anti-inflammatory activities of six extracts (dichloromethane, ethyl acetate, butanol, aqueous,...

  • NOTES. Stability of doripenem in polyvinyl chloride bags and elastomeric pumps.
    Crandon, Jared L.; Sutherland, Christina; Nicolau, David P. // American Journal of Health-System Pharmacy; 9/15/2010, Vol. 67 Issue 18, p1539 

    Purpose. The stability of doripenem 500 and 1000 mg in polyvinyl chloride (PVC) bags and elastomeric pumps at various storage temperatures was evaluated. Methods. Commercially available doripenem vials were reconstituted and mixed with either 0.9% sodium chloride injection or 5% dextrose...

  • Trouble Shooting Tips.
    Crandon, Jared L.; Sutherland, Christina; Nicolau, David P. // Popular Plastics & Packaging; Jul2009, Vol. 54 Issue 7, p33 

    The article outlines tips for troubleshooting polyvinyl chloride (PVC) fittings. It indicates the probable cause of PVC problems such as brittleness, flowlines, surface defects, gloss deficiency, delamination, sink marks, warpage, weld problems, flashing, shear burning, jetting, and sprue...

  • Do the solvolysis reactions of secondary substrates occur by the S1 or S2 mechanism: or something else?
    Pagni, Richard M. // Foundations of Chemistry; 2011, Vol. 13 Issue 2, p131 

    Primary and methyl aliphatic halides and tosylates undergo substitution reactions with nucleophiles in one step by the classic S2 mechanism, which is characterized by second-order kinetics and inversion of configuration at the reaction center. Tertiary aliphatic halides and tosylates undergo...

  • Transition-metal-catalyzed direct arylations via C-H bond cleavages.
    Ackermann, Lutz // Pure & Applied Chemistry; Jul2010, Vol. 82 Issue 7, p1403 

    Palladium catalysts allowed for intermolecular direct arylations of heteroarenes with aryl chlorides, tosylates, or mesylates as electrophiles. As an economically attractive alter native, inexpensive copper catalysts could be employed for regioselective C-H bond aryl ations of 1,2,3-triazoles....

  • On direct iron-catalyzed cross-coupling reactions.
    Czaplik, Waldemar Maximilian; Mayer, Matthias; Grupe, Sabine; von Wangelin, Axel Jacobi // Pure & Applied Chemistry; Jul2010, Vol. 82 Issue 7, p1545 

    A new methodology for the direct cross-coupling reaction between aryl halides and alkyl halides under iron catalysis is described. Unlike conventional protocols, the direct cross-coupling obviates the need for the preformation of stoichiometric amounts of Grignard species and thus exhibits a...

  • PVC in packaging�why not?
    Athalye, A. S. // Popular Plastics & Packaging; Nov2009, Vol. 54 Issue 11, p62 

    The article focuses on the use of polyvinyl chloride (PVC) in the packaging industry. It outlines several products that utilize rigid PVC film/sheet including blister packs, bottles and adhesive tapes. It states the benefits and disadvantages of applying PVC to products. In the author's view,...

  • Quantitative analysis of toxic halogenated contaminants in Oluyoro stream of Nigeria.
    Adebowale, Adedotun; Tuan Phan // Environment, Development & Sustainability; Jun2010, Vol. 12 Issue 3, p357 

    Analysis of organic contaminants is reported for the Oluyoro stream located in the South-Western Nigeria. Using gas chromatography methods with flame ionization, electron capture and mass spectrometer detectors, alarming levels of organic pollutants including alkanes, alkenes, alcohols and alkyl...

  • Dehydrohalogenation of haloalkylarenes in the synthesis of alkenylaromatic hydrocarbons.
    Magerramov, A.; Magerramov, M.; Aliev, I.; Mustafaev, A.; Askerova, U. // Russian Journal of Organic Chemistry; Feb2012, Vol. 48 Issue 2, p293 

    The article presents a research study which focuses on the synthesization of haloalkylarenes' dehydrohalogenation if combined with alkenylaromatic hydrocarbons. Researchers found the significant role of aromatic hydrocarbon alkylation in yielding haloalkylaromatic compounds through acid...

  • Synthesis of the complex bridged 1,5-oxazabicycles via one-pot reactions of 4,5-diazafluoren-9-one, alkyl halides, and cyclic 1,3-diketone.
    Hui, L.; Gao, S.; Yan, C. // Chemistry of Heterocyclic Compounds; Jul2012, Vol. 48 Issue 4, p658 

    An efficient and practical procedure for the preparation of the complex bridged 1,5-oxazabicycles was developed via a one-pot domino reaction of 4,5-diazafluoren-9-one, reactive alkyl halides, and cyclic 1,3-dicarbonyl compounds.

  • A PRELIMINARY BIOCHEMICAL SCREENING OF HELICTERES ISORA L. STEM BARK IN CARBON TETRACHLORIDE INDUCED TOXICITY IN RATS.
    DHEVI, R.; GAYATHRI, K.; SHABI, M. MOHAMED; SUBASHINI, U.; DUBEY, G. P.; RAJAMANICKAM, G. VICTOR; CHITRA, M. // Bulgarian Journal of Veterinary Medicine; Dec2008, Vol. 11 Issue 4, p235 

    Helicteres isora, a tall shrub common in central and western India is an effective antidote to snake bite and is also used for various intestinal disorders. The potential efficacy for hepatocellular regeneration of the ethanolic extract of Helicteres isora L. at doses of 150 and 250 mg/kg was...

  • Basic Resin Mediated Efficient One-Pot Synthesis of Carbazates from the Corresponding Alkyl Halides.
    Chaturvedi, D.; Chaturvedi, A. K.; Mishra, N.; Mishra, V // Journal of the Iranian Chemical Society (Journal of the Iranian ; Sep2009, Vol. 6 Issue 3, p510 

    A quick and efficient, one-pot synthesis of carbazates was accomplished in high yields by the reaction of various primary, secondary, and tertiary alkyl halides with a variety of substituted hydrazines using Amberlite IRA 400 basic resin/CO2 system. The reaction conditions were mild with simpler...

  • Unexpected formation of ethyl 5-cyano-6-[cyano(4′-phenyl-1,3′-selenazol-2-yl)methyl]-4-(furan-2′-yl)-2-methyl-1,4-dihydropyridine-3-carboxylate.
    Dyachenko, V. D.; Roman, S. V. // Russian Journal of General Chemistry; Feb2011, Vol. 81 Issue 2, p442 

    The article reports on the unexpected formation of ethyl 5-cyano-6-[cyano(4′-phenyl-1,3′-selenazol-2-yl)methyl]-4-(furan-2′-yl)-2-methyl-1,4-dihydropyridine-3-carboxylate. This formation was formed with the use of alkyl halide in the condensation of 2-Furfurylidene acetoacetic...

  • Water Fastness of Screen Printed Pearl Luster Pigments based on Synthetic and Natural Mica on Polyvinyl Chloride Foil and Rich Mineral Paper.
    Karlovits, Mirica; Novaković, Dragoljub; Gregor-Svetec, Diana // Acta Graphica; 2012, Vol. 23 Issue 3/4, p65 

    The present study attempts to examine water fastness of screen printed pearl luster pigments based on synthetic and natural mica on polyvinyl chloride foil and Rich Mineral Paper. Three types of pearl luster pigments were used, each different from the other in composition, interference colour...

  • The effect of nanosized fillers on the structure and on the deformation and strength characteristics of polymer blends based on nitrile butadiene rubber and polyvinyl chloride.
    Pshikhachev, A. G.; Tkhakakhov, R. B.; Zhazaeva, E. M.; Kumykov, T. S.; Karamurzov, B. S.; Tkhakakhov, E. R. // International Polymer Science & Technology;  

    The effect of nanosized fillers on the structure and on the deformation and strength characteristics of polymer blends based on nitrile butadiene rubber and polyvinyl chloride was studied.

  • Adhesive properties of plasma-modified polytetrafluoroethylene films.
    Yablokov, M.; Kechek’yan, A.; Bazhenov, S.; Gil’man, A.; Piskarev, M.; Kuznetsov, A. // High Energy Chemistry;  

    A procedure was developed for the determination of the adhesion characteristics of the modified surface of thin polymer films, including those treated in a low-temperature plasma, with the use of the Scotch® 810 adhesive tape. The procedure comprises coating the surface to be studied by...

  • Design, synthesis and biological evaluation of benzoxazole derivatives as new anti-inflammatory agents.
    Srinivas, B.; Sammaiah, G.; Brahmeshwari, G. // Der Chemica Sinica; 2014, Vol. 5 Issue 1, p89 

    New series of N-(5-(5-(Alkylthio)-1,3,4-oxadiazol-2-yl)benzoxazol-2-yl)benzamide derivatives(VI) were synthesized by the reaction of N-(5-(5-mercapto-1,3,4-oxadiazol-2-yl)benzooxazol-2-yl) benzamides with appropriate alkyl halides. The chemical structures of the synthesized compounds were...

  • 6,7,8,10-Tetra-O-benzyl-1,2,3,4-tetradeoxy-a-D-gluco-dec-5- ulopyranosyl 2,3,4,6-Tetra-O-benzyl-α-D-glucopyranoside.
    Yamanoi, Takashi; Inoue, Ryo; Oda, Yoshiki; Hamasaki, Keita // Molbank; Jun2010, Vol. 10 Issue 2, p1 

    The title compound 1 was synthesized by the coupling reaction of 6,7,8,10-tetra-O-benzyl-1,2,3,4-tetradeoxy-α-D-gluco-dec-5-ulopyranose (2) with 2,3,4,6-tetra-O-benzyl-D-glucopyranose (3) in the presence of 5 mol% bismuth(III) triflate in dichloromethane at 0 °C.

  • Influence of roofing materials and lead flashing on rainwater tank contamination by metals.
    Magyar, M. I.; Ladson, A. R.; Diaper, C.; Mitchell, V. G. // Australian Journal of Water Resources; 2014, Vol. 18 Issue 1, p71 

    The quality of rainwater collected in polyvinyl chloride (PVC) tanks from six trial roofs (glazed tile, pre-painted steel and aluminium-zinc coated steel, each with and without uncoated lead flashing) was monitored for nine months. Samples of water and sediment were collected at three monthly...

  • Structure of the high-temperature phase of tetrafluoromethane CF4.
    Klimenko, N. A.; Gal'tsov, N. N.; Prokhvatilov, A. I. // Low Temperature Physics; Nov2008, Vol. 34 Issue 11, p960 

    X-Ray studies of the structure of the high-temperature β phase and the α-β orientational phase transition of carbon tetrafluoride have been performed. It has been found that β-CF4 possesses a monoclinic cell with the parameters a=13.732 Å, b=12.815 Å, c=13.429 Å, and...

  • A new route to 1-chlorosilatrane.
    Voronkov, M. G.; Kuznetsova, G. A.; Baryshok, V. P. // Russian Journal of General Chemistry; Oct2010, Vol. 80 Issue 10, p1926 

    method for the synthesis of 1-chlorosilatrane by the reaction of organyltrichlorosilanes RSiCl (R = Vin, Ph) and tetrachlorosilane with triethanolamine or its hydrochloride was developed. This simple and economical method allows obtaining 1-chlorosilatrane in 60% yield.

  • Solid-phase synthesis for beginners: Choice of tools and techniques for implementation of multistage transformations.
    Babaev, E. V. // Russian Journal of General Chemistry; Dec2010, Vol. 80 Issue 12, p2590 

    Several mini-libraries were prepared by solid-phase synthesis: C,N-substituted glycines (1) and 2,5-diaminobenzoic acids (2) using Wang resin as well as diarylthioureas (3) and diaryl-guanidines (4) using Rink resin. Comparative analysis of the instruments and technique for these reactions was...

  • Synthesis of some N-alkylated 1,2,4-triazoles, 1,3,4-oxadiazoles, and 1,3,4-thiadiazoles based on N-(furan-2-yl-methylidene)-4,6-dimethyl-1H-pyrazolo-[3,4- b]pyridine-3-amine.
    El-Essawy, F.; Rady, S. // Chemistry of Heterocyclic Compounds; Jul2011, Vol. 47 Issue 4, p497 

    N-(Furan-2-ylmethylidene)-4,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-3-amine was prepared and alkyla- ted with the corresponding halo compounds to afford N-alkylated products. 2-[3-(Furan-2-ylmethy- lideneamino)-4,6-dimethyl-1H-pyrazolo[3,4-b]pyridin-1-yl]acetohydrazide was converted into the key...

  • A biomolecule-compatible visible-light-induced azide reduction from a DNA-encoded reaction-discovery system.
    Yiyun Chen; Kamlet, Adam S.; Steinman, Jonathan B.; Liu, David R. // Nature Chemistry; Feb2011, Vol. 3 Issue 2, p146 

    Using a system that accelerates the serendipitous discovery of new reactions by evaluating hundreds of DNA-encoded substrate combinations in a single experiment, we explored a broad range of reaction conditions for new bond-forming reactions. We discovered reactivity that led to a...

  • A Practical Approach to New (5Z) 2-Alkylthio-5-arylmethylene-1-methyl-1,5-dihydro-4H-imidazol-4-one Derivatives.
    Bourahla, Khadidja; Paquin, Ludovic; Lozach, Olivier; Meijer, Laurent; Carreaux, François; Bazureau, Jean Pierre // Molecules; Sep2011, Vol. 16 Issue 9, p7377 

    A practical protocol for the preparation of (5Z)-2-alkylthio-5-arylmethylene-1-methyl-1,5-dihydro-4H-imidazol-4-one derivatives is reported. The new compounds were obtained in good yield and stereoselectivity in two steps, namely a solvent-free Knoevenagel condensation under microwave...

  • Termomechanical and electrical properties of segregated polymer nanocomposites based on polyvinyl chloride and carbon nanotubes.
    Mamunya, Ye. P.; Levchenko, V. V.; Lebedev, E. V.; Boiteux, G. // Polymer Journal (18181724); 2008, Vol. 30 Issue 4, p324 

    Conductive segregated systems based on polyvinyl chloride (PVC) and carbon nanotubes (CNT) obtained by hot-compacting have been studied. The filler creates the conductive skeleton at ultra-low value of the percolation threshold jñ = 0,045 vol.%. The presence of the filler macro-network...

  • Synthesis and alkylation of 1-alkyl(aryl)-4-cyano-3-dicyanomethylene-substituted carbo[ c]fused pyridines. Molecular and crystal structure of 2-(4-cyano-1-methyl-5,6,7,8-tetrahydroisoquinolin-3-yl)-2-(2-oxo-2-phenylethyl)malononitrile and...
    Dyachenko, I.; Rusanov, E.; Gutov, A.; Vovk, M. // Russian Journal of General Chemistry; Jul2013, Vol. 83 Issue 7, p1383 

    Condensation of 2-acyl-1-( N-morpholinyl)cycloalkene with malononitrile dimer results in 1-alkyl-(aryl)-4-cyano-3-dicyanomethylene-substituted carbo[ c]fused pyridines. Reaction of the latter with alkyl halides affords the corresponding 2-alkyl-2-(3-isoquinolinyl)malononitrile,...

  • 3-aryl(alkyl)quinazoline-2,4(1 H,3 H)-diones and their alkyl derivatives.
    Shestakov, A. S.; Sidorenko, O. E.; Bushmarinov, I. S.; Shikhaliev, Kh. S.; Antipin, M. Yu. // Russian Journal of Organic Chemistry; Nov2009, Vol. 45 Issue 11, p1691 

    Two-stage reaction of methyl anthranilate with aryl(alkyl) isocyanates in keeping with the quantumchemical calculations and XRD analysis resulted in 3-aryl(alkyl)quinazoline-2,4(1 H,3 H)-diones that by treatment with alkyl halides, phenacyl bromides, esters and amides of chloroacetic acid were...

  • 3-(2-Aminophenyl)-4-methyl-1,3-thiazole-2(3H)-thione as an Ecofriendly Sulphur Transfer Agent to Prepare Alkanethiols in High Yield and High Purity.
    Mohammed Amine Mehdid; Djafri, Ayada; Roussel, Christian; Andreoli, Federico // Molecules; Nov2009, Vol. 14 Issue 11, p4634 

    A new process is described for preparing very pure linear alkanethiols and linear a,?-alkanedithiols using a sequential alkylation of the title compound, followed by a ring closure to quantitatively give the corresponding 3-methyl[1,3]thiazolo[3,2-a]- [3,1]benzimidazol-9-ium salt and the...

  • Hazards to Birds from Open Metal Pipes.
    Hathcock, Charles D.; Fair, Jeanne M. // Western North American Naturalist; Aug2014, Vol. 74 Issue 2, p228 

    There are reports of open polyvinyl chloride (PVC) pipes causing bird deaths in the western United States (Brattstrom 1995). Here, we document cases of open bollards and open pipes on gates causing bird deaths in northern New Mexico. At Los Alamos National Laboratory (LANL), a 10,240-ha site,...

  • Zaitsev's rule Chemistry.
    Hathcock, Charles D.; Fair, Jeanne M. // Dictionary of Theories; 2002, p561 

    A definition of the term "Zaitsev's rule" is presented. It refers to a chemistry-based rule which asserts that dehydrohalogenation of an alkyl halide yields the more substituted of the two possible alkenes as the predominant product. As per the rule, hydrogen is eliminated from the carbon atom...

  • Amelioration of carbon tetrachloride induced hepatic damage by methanolic rhizome extract of Atropa accuminata in Wistar rats.
    Nisar, Albeena; Banday, Tabish; Masood, Akbar; Zargar, Mohammed Afzal // Journal of Pharmacy Research; 2012, Vol. 5 Issue 8, p4454 

    Ethnopharmacological relevance: Atropa acuminata has been widely used in folk medicine for the treatment of arthritis related inflammatory disorders, muscle and joint pain, muscle spasms . Aerial parts of this plant have been used in traditional medicine to treat innumerable ailments such as...

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