bluuebunny/crossref_metadata_2025 huggingface dataset:
Elementary Process Theory: a formal axiomatic system with a potential application as a foundational framework for physics supporting gravitational repulsion of matter and antimatter
Authors: Cabbolet M.J.T.F.
Published: August 2010

Theories of modern physics predict that antimatter having rest mass will be attracted by the earth's gravitational field, but the actual coupling of antimatter with gravitation has not been established experimentally. The purpose of the present research was to identify laws of physics that would govern the universe if antimatter having rest mass would be repúlsed by the earth's gravitational field. As a result, a formalized axiomatic system was developed together with interpretation rules for the terms of the language: the intention is that every theorem of the system yields a true statement about physical reality. Seven non‐logical axioms of this axiomatic system form the Elementary Process Theory (EPT): this is then a scheme of elementary principles describing the dynamics of individual processes taking place at supersmall scale. It is demonstrated how gravitational repulsion functions in the universe of the EPT, and some observed particles and processes have been formalized in the framework of the EPT. Incompatibility of Quantum Mechanics (QM) and General Relativity (GR) with the EPT is proven mathematically; to demonstrate applicability to real world problems to which neither QM nor GR applies, the EPT has been applied to a theory of the Planck era of the universe. The main conclusions are that a completely formalized framework for physics has been developed supporting the existence of gravitational repulsion and that the present results give rise to a potentially progressive research program.
Das Maß aller Ringe – N‐heterocyclische Carbene
Authors: Dröge Thomas , Glorius Frank
Published: August 2010

Die Quantifizierung und Variation der charakteristischen Eigenschaften von Ligandenklassen ist ein spannendes und lohnenswertes Forschungsgebiet. N‐heterocyclische Carbene (NHCs) sind dabei wegen ihres Elektronenreichtums und ihrer Struktur von besonderem Interesse. Deshalb haben NHCs weite Verbreitung als Liganden in der Übergangsmetallkatalyse und der Organometallchemie sowie auch direkt in der Organokatalyse gefunden. Hier wird ein Überblick über die physikochemischen Daten (Elektronik, Sterik, Bindung) von NHCs gegeben, die für das Design, die Anwendung und das mechanistische Verständnis dieser Verbindungen in der Katalyse nützlich sind.
Metal Triflimidates: Better than Metal Triflates as Catalysts in Organic Synthesis—The Effect of a Highly Delocalized Counteranion
Authors: Antoniotti Sylvain , Dalla Vincent , Duñach Elisabet
Published: August 2010

The continuously increasing need for novel and selective methods in organic synthesis to aid drug discovery and to address environmental concerns is a constant source of stimulation to develop novel and more efficient reaction systems. This has often resulted in a focus on transition metals, ligands, and additives, with much less attention paid to the counterion(s) of the metal cation. Recently, metal salts with one or more triflimidate counterion(s) have appeared as a unique class of catalysts that display outstanding σ‐ and π‐Lewis acid character. The highly delocalized nature of the triflimidate counterion, combined with its high steric hindrance results in virtually no nucleophilic behavior and an extremely high positive charge density on the metal cation, thus enhancing its Lewis acid character. Consequently, these metal triflimidates often outperform their metal halide or triflate analogues. This Review describes general methods for the preparation of metal triflimidate salts and their use as catalysts.
The Measure of All Rings—N‐Heterocyclic Carbenes
Authors: Dröge Thomas , Glorius Frank
Published: August 2010

Quantification and variation of characteristic properties of different ligand classes is an exciting and rewarding research field. N‐Heterocyclic carbenes (NHCs) are of special interest since their electron richness and structure provide a unique class of ligands and organocatalysts. Consequently, they have found widespread application as ligands in transition‐metal catalysis and organometallic chemistry, and as organocatalysts in their own right. Herein we provide an overview on physicochemical data (electronics, sterics, bond strength) of NHCs that are essential for the design, application, and mechanistic understanding of NHCs in catalysis.
Total Synthesis of (−)‐Morphine
Authors: Koizumi Hifumi , Yokoshima Satoshi , Fukuyama Tohru
Published: August 2010

We have developed an efficient total synthesis of (−)‐morphine in 5 % overall yield with the longest linear sequence consisting of 17 steps from 2‐cyclohexen‐1‐one. The cyclohexenol unit was prepared by means of an enzymatic resolution and a Suzuki–Miyaura coupling as key steps. Construction of the morphinan core features an intramolecular aldol reaction and an intramolecular 1,6‐addition. Furthermore, mild deprotection conditions to remove the 2,4‐dinitrobenzenesulfonyl (DNs) group enabled the facile construction of the morphinan skeleton. We have also established an efficient synthetic route to a cyclohexenol unit containing an N‐methyl‐DNs‐amide moiety.
The large‐scale water cycle of the West African monsoon
Authors: Bock O. , Guichard F. , Meynadier R. , Gervois S. , Agustí‐Panareda A. , Beljaars A. , Boone A. , Nuret M. , Redelsperger J.‐L. , Roucou P.
Published: August 2010

The vertically integrated water budget of West Africa is investigated with a hybrid dataset based on observational and modelling products elaborated by the African Monsoon Multidisciplinary Analyses (AMMA) and with several numerical weather prediction (NWP) products including the European Centre for Medium‐Range Weather Forecasts (ECMWF) AMMA reanalysis. Seasonal and intraseasonal variations are quantified over the period 2002–2007. Links between the budget terms are analyzed regionally, from the Guinean coast to the Sahel zone. Water budgets from the NWP systems are intercompared and evaluated against the hybrid dataset. Large deficiencies are evidenced in all the NWP products. Hypotheses are proposed about their origins and several improvements are foreseen. Copyright © 2010 Royal Meteorological Society
Interactive MATLAB‐based demo program for sum of independent random variables
Authors: Jovanovic Dolecek Gordana
Published: August 2010

We present an interactive MATLAB‐based demo program devoted to teaching undergraduate students the behavior of the sum of independent random variables. The user chooses the type of the variables, and the parameters of these variables. The sum is shown in the time domain followed by the estimation of the probability density of the sum using a histogram. It is subsequently shown that the probability density of the sum of random variables represents the convolution of the density functions of the corresponding variables. The Central Limit Theorem and the progression of the sum towards this limit are illustrated in terms of the number of summands. The software can be used as a complement to theoretical classes or alone as a self‐study tool. Student evaluation of the program is also included. © 2010 Wiley Periodicals, Inc. Comput Appl Eng Educ 21: 372–385, 2013
Recyclable Dirhodium Catalysts Embedded in Nanoporous Surface‐Functionalized Organosilica Hosts for Carbenoid‐Mediated Cyclopropanation Reactions
Authors: Dikarev Evgeny V. , Kumar D. Krishna , Filatov Alexander S. , Anan Abhishek , Xie Youwei , Asefa Tewodros , Petrukhina Marina A.
Published: August 2010

Recyclable and efficient heterogeneous catalysts have been prepared by embedding dirhodium(II,II) core carboxylate complexes into the amine‐functionalized nanosized channels of a mesoporous silica host, amine–SBA‐15. Two alternative synthetic procedures for the preparation of the catalysts have been developed and adapted for the immobilization of dirhodium complexes of variable Lewis acidity. The catalytic activity of the resulting solid materials has been evaluated in model cyclopropanation reactions of styrene at variable reaction conditions (reaction substrate, temperature, time, and solvent). Importantly, the designed catalysts, which can be readily recovered and reused, display the reactivity and selectivity profiles exceeding or comparable to their homogeneous dirhodium(II) counterparts.
Synthesis by Replacement Reaction and Application of TiO2‐Supported Au–Ni Bimetallic Catalyst
Authors: Wu Zhijie , Zhao Zongfang , Zhang Minghui
Published: August 2010

A TiO2‐supported Au on Ni bimetallic nanoparticle catalyst is prepared by electroless nickel plating and the sequential chemical replacement reaction of supported Ni nanoparticles with Au3+ ions. The size of nickel nanoparticles decreases and highly dispersed gold clusters form on the external surface of the nickel nanoparticles during replacement and sequential thermal treatment. Hydrogen chemisorption and X‐ray photoelectron spectroscopy show the interface interaction between Au atoms and the surface of nickel nanoparticles, optimization of which can enhance hydrogen adsorption and chlorobenzene hydrodechlorination activity and stability. The surface enrichment of gold species on the Au–Ni bimetallic nanoparticles benefits the removal of Cl species from the surface of active sites during hydrodechlorination and then promotes the stability of the catalyst. A series of Au–Ni bimetallic nanoparticles with different particle sizes are synthesized by using different‐sized nickel particles from electroless plating as precursors. The larger Au–Ni nanoparticles exhibit higher hydrodechlorination activity and stability, suggesting that chlorobenzene hydrodechlorination on Au–Ni nanoparticles is structure sensitive. These findings hold promise for a simple route to design and synthesis of bimetallic systems as highly active and stable catalysts for the catalytic reactions.
Application of Response Surface Methodology for Optimization of Xylitol Production from Lignocellulosic Hydrolysate in a Fluidized Bed Reactor
Authors: Sarrouh B. F. , da Silva S. S.
Published: August 2010

This work aims to contribute to the development of a viable technology for the production of xylitol from sugarcane bagasse hemicellulose hydrolysate, using a fluidized bed bioreactor with yeast cells of Candida guilliermondii FTI 20037. To evaluate the technical viability of this biotechnological process, simple batch fermentations were realized according to a 23 factorial design with three center points. Furthermore, the influence of the variables fluidization flux, hydrolysate concentration factor and air flow on process yield and volumetric productivity were evaluated. The results obtained showed that only an increase in fluidization flux had a positive influence on process yield and volumetric productivity. This is due to better oxygen transfer to the inside of the cell, leading to increased xylose consumption and xylitol production rates.
Techno‐Economic Analysis of Hydrazine Hydrate Technologies
Authors: Nikhitha P. , Saibabu K. B. S.
Published: August 2010

The increasing demand of current world production for hydrazine hydrate emphasizes the need to focus on the techno‐economic analysis of the existing technologies. Three processes, namely the Raschig process, urea process, and peroxide‐ketazine process, are chosen for technical analysis followed by cost estimation and economic assessment. The technical part involves the development of flow sheets, process design, carrying out of calculations as well as estimation of raw materials, labor, utilities, and process equipment by sizing and other sub‐components. The economic part comprises the estimation of working capital, fixed capital investment, total capital investment, and total production costs. Economic parameters like net profits, rate of return, payback period, and break‐even point are also estimated to perform economic analysis. The results obtained from technical analysis and economical feasibility studies show that the peroxide‐ketazine‐based hydrazine hydrate technology has clear advantages in terms of raw material consumption and economic competitiveness.
Nanoparticle Production with Stirred‐Media Mills: Opportunities and Limits
Authors: Knieke C. , Steinborn C. , Romeis S. , Peukert W. , Breitung‐Faes S. , Kwade A.
Published: August 2010

Nanoparticles can be produced by wet grinding in stirred‐media mills. In the lower nanometer range a true grinding limit exists, where the transferred energy from the grinding media is no longer sufficient to induce further breakage of the particles even after stressing events with high stress energies. Variations in process conditions lead to the conclusion that the grinding limit is hardly affected by most of the investigated process parameters. However, at high solids concentrations and/or small particle sizes, a drastic increase in suspension viscosity occurs, which leads to a dampening of the grinding media motion and to a reduction in the transferred stress energy. Hence, the rheological behavior can limit the grinding process, and a viscous dampening‐related grinding limit can be reached prior to the true grinding limit.
Two Colliding Grinding Beads: Experimental Flow Fields and Particle Capture Efficiency
Authors: Gers R. , Anne‐Archard D. , Climent E. , Legendre D. , Frances C.
Published: August 2010

Hydrodynamics plays a major role in wet grinding processes used to produce nanoparticles, but its influence on the mechanisms of fragmentation is not fully understood. The focus is on hydrodynamics in the gap between two grinding beads. Using particle image velocimetry in a large‐scale experiment, the velocity field between the beads has been investigated when the beads get closer (down to one‐tenth of their radius). Different configurations have been studied, varying from frontal approach to tangential collision. Finally, a capture probability of suspended particles has been estimated.
Site‐Specific Investigation of the Steady‐State Kinetics and Dynamics of the Multistep Binding of Bile Acid Molecules to a Lipid Carrier Protein
Authors: Cogliati Clelia , Ragona Laura , D'Onofrio Mariapina , Günther Ulrich , Whittaker Sara , Ludwig Christian , Tomaselli Simona , Assfalg Michael , Molinari Henriette
Published: August 2010

The investigation of multi‐site ligand–protein binding and multi‐step mechanisms is highly demanding. In this work, advanced NMR methodologies such as 2D 1H–15N line‐shape analysis, which allows a reliable investigation of ligand binding occurring on micro‐ to millisecond timescales, have been extended to model a two‐step binding mechanism. The molecular recognition and complex uptake mechanism of two bile salt molecules by lipid carriers is an interesting example that shows that protein dynamics has the potential to modulate the macromolecule–ligand encounter. Kinetic analysis supports a conformational selection model as the initial recognition process in which the dynamics observed in the apo form is essential for ligand uptake, leading to conformations with improved access to the binding cavity. Subsequent multi‐step events could be modelled, for several residues, with a two‐step binding mechanism. The protein in the ligand‐bound state still exhibits a conformational rearrangement that occurs on a very slow timescale, as observed for other proteins of the family. A global mechanism suggesting how bile acids access the macromolecular cavity is thus proposed.
General Strategy for a Large‐Scale Fabric with Branched Nanofiber–Nanorod Hierarchical Heterostructure: Controllable Synthesis and Applications
Authors: Shang Meng , Wang Wenzhong , Yin Wenzong , Ren Jia , Sun Songmei , Zhang Ling
Published: August 2010

The preparation and characterization of a branched nanofiber–nanorod hierarchical heterostructure fabric (TiO2/NiO, TiO2/ZnO, and TiO2/SnO2) are described. The nanomaterial was synthesized on a large scale by an inexpensive, generalizable, facile, and controllable approach by combining the electrospinning technique with a hydrothermal method. The controllable formation process and factors (assistance by hexamethylenetetramine and metal oxide nuclei) influencing the morphology of the branched hierarchical heterostructure are discussed. In addition, photocurrent and photocatalytic studies suggest that the branched hierarchical heterostructure fabric shows higher mobility of charge carriers and enhanced photocatalytic activity relative to a bare TiO2 nanofibrous mat and other heterostructures under irradiation by light. This work demonstrates the possibility of growing branched heterostructure fabrics of various uniform, one‐dimensional, functional metal oxide nanorods on a TiO2 nanofibrous mat, which has a tunable morphology by changing the precursor. The study may open a new channel for building hierarchical heterostructure device fabrics with optical and catalytic properties, and allow the realization of a new class of nano‐heterostructure devices.
Enhanced Anion Binding from Unusual Coordination Modes of Bis(thiourea) Ligands in Platinum Group Metal Complexes
Authors: Soriano M. Laura , Lenthall Joseph T. , Anderson Kirsty M. , Smith Stephen J. , Steed Jonathan W.
Published: August 2010

Treatment of a range of bis(thiourea) ligands with inert organometallic transition‐metal ions gives a number of novel complexes that exhibit unusual ligand binding modes and significantly enhanced anion binding ability. The ruthenium(II) complex [Ru(η6‐p‐cymene)(κS,S′,N‐L3−H)]+ (2 b) possesses juxtaposed four‐ and seven‐membered chelate rings and binds anions as both 1:1 and 2:1 host guest complexes. The pyridyl bis(thiourea) complex [Ru(η6‐p‐cymeme)(κS,S′,Npy‐L4)]2+ (4) binds anions in both 1:1 and 1:2 species, whereas the free ligand is ineffective because of intramolecular NH⋅⋅⋅N hydrogen bonding. Novel palladium(II) complexes with nine‐ and ten‐membered chelate rings are also reported.
ChemInform Abstract: Thermotropic Liquid Crystals Based on Amphiphilic Carbohydrates
Authors: PRADE H. , MIETHCHEN R. , VILL V.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation of Crystallized Sr1‐xCaxMoO4 Solid‐Solution Films by an Electrochemical Method at Room Temperature and Their Luminescence.
Authors: YOSHIMURA M. , OHMURA M. , CHO W.‐S. , YASHIMA M. , KAKIHANA M.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Study of Ferromagnetic Pb(Fe2/3W1/3)O3‐PbTiO3 Solid Solutions.
Authors: SHEVCHUK YU. A. , KORCHAGINA S. K. , GAGULIN V. V. , BOGATKO V. V.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electroorganic Chemistry. Part 154. Synthesis of Symmetrical and Unsymmetrical 1,2‐Diketones Through Cathodic Intramolecular Coupling of Diesters.
Authors: KASHIMURA S. , MURAI Y. , WASHIKA C. , YOSHIHARA D. , KATAOKA Y. , MURASE H. , SHONO T.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Diels‐Alder Reactivity of 1‐Alkoxyphenyl‐3‐trialkylsiloxy‐1,3‐dienes.
Authors: ADEVA M. , CABALLERO E. , GARCIA F. , MEDARDE M. , SAHAGUN H. , TOME F.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Anomalous Products from Intramolecular Insertion Reactions of Rhodium Carbenoids into the α‐C‐H Bonds of Ethers.
Authors: CLARK J. S. , DOSSETTER A. G. , RUSSELL C. A. , WHITTINGHAM W. G.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Functionalized Bicyclo(4.4.0) and Spiro (5.4) Compounds by Tin‐Mediated Radical Cyclization.
Authors: SHANMUGAM P. , SRINIVASAN R. , RAJAGOPALAN K.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Thiolactones Using Benzyltrietylammonium Tetrathiomolybdate as Sulfur Transfer Reagent.
Authors: BHAR D. , CHANDRASEKARAN S.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Novel Ring Transformation of Nitropyrimidinone; Synthetic Equivalent of α‐Nitroformylacetic Acid.
Authors: NISHIWAKI N. , WANG H.‐P. , MATSUO K. , TOHDA Y. , ARIGA M.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Acid‐Promoted Rearrangement of Cyclic α,β‐Epoxy Acylates: Stereoselective Synthesis of Spirocyclanes and Quaternary Carbon Centers.
Authors: KITA Y. , KITAGAKI S. , YOSHIDA Y. , MIHARA S. , FANG D.‐F. , KONDO M. , OKAMOTO S , IMAI R. , AKAI S. , FUJIOKA H.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Hydroxy(or Hydroperoxy)‐Substituted 1,2,4‐ Trioxacycloalkanes by the Ozonolysis of Unsaturated Hydroperoxy Acetals.
Authors: USHIGOE Y. , TORAO Y. , MASUYAMA A. , NOJIMA M.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Iodotrimethylsilane: A Mild and Efficient Reagent for the Reduction of Azides to Amines.
Authors: KAMAL A. , RAO N. V. , LAXMAN E.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Generation and Reactivity of Allylic and Benzylic Samarium Compounds Using Diiodosamarium in Tetrahydropyran.
Authors: HAMANN‐GAUDINET B. , NAMY J.‐L. , KAGAN H. B.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Grignard Reactions to α‐Amino Nitrones. Synthesis of Optically Active α‐Aminohydroxylamines and 1,2‐ Diamines.
Authors: MERINO P. , LANASPA A. , MERCHAN F. L. , TEJERO T.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Assembly of Tricyclic Compounds That Include the Spiro(4.4)nonane Subunit.
Authors: LIU P.‐Y. , WU Y.‐J. , BURNELL D. J.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Biomolecular Formation of Radicals by Hydrogen Transfer. Part 13. Uncatalyzed Transfer Hydrogenation of Azulene and the Initiation of the Azulene‐Naphthalene Rearrangement
Authors: KELLER F. , BECKHAUS H.‐D. , RUECHARDT C.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Nickel‐ vs Palladium‐Catalyzed Synthesis of Protected Phenols from Aryl Halides.
Authors: MANN G. , HARTWIG J. F.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Reliable Chiral Transfer Through Thermodynamic Equilibrium of the Intramolecular Meerwein‐Ponndorf‐Verley Reduction and Oppenauer Oxidation.
Authors: FUJITA M. , TAKARADA Y. , SUGIMURA T. , TAI A.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Chiral 2‐Arylpropenoic Esters by the Palladium Catalyzed Carbonylation of Arylacetylenes
Authors: MONTEIRO A. L. , LANDO V. R. , GASPARINI V.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Regio‐ and Stereoselective Ring Openings of Unsymmetrical Oxatricyclo Adducts.
Authors: WOO S. , PARVEZ M. , KEAY B. A.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Selective Preparation of Polycyclic Aromatic Hydrocarbons. Part 7. A Preparative Route to 10,11‐Dihydro‐5H‐dibenzo(a,d)cycloheptenes Using Friedel‐Crafts Intramolecular Cyclobenzylation.
Authors: YAMATO T. , SAKAUE N. , KOMINE M. , NAGANO Y.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Modified Procedure for the Synthesis of C3‐Symmetric “Mixed‐Tail” Triphenylenes.
Authors: WRIGHT P. T. , GILLIES I. , KILBURN J. D.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Electrochemistry of Diels‐Alder Adducts of (60)Fullerene with a Phthalocyanine and a Hemiporphyrazine.
Authors: DUERR K. , FIEDLER S. , LINSSEN T. , HIRSCH A. , HANACK M.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Inhibition of UDP‐Gal Mutase and Mycobacterial Galactan Biosynthesis by Pyrrolidine Analogues of Galactofuranose.
Authors: LEE R. E. , SMITH M. D. , NASH R. J. , GRIFFITHS R. C. , MCNEIL M. , GREWAL R. K. , YAN W. , BESRA G. S. , BRENNAN P. J. , FLEET G. W. J.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Use of Conformationally Restricted Benzamidines as Arginine Surrogates in the Design of Platelet GPIIb‐IIIa Receptor Antagonists.
Authors: SALL D. J. , ET AL. ET AL.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: First Diastereoselective (3 + 2) Cycloaddition of Chiral Non‐Racemic Alkenyl Fischer Carbene Complexes with Diazomethane Derivatives.
Authors: BARLUENGA J. , FERNANDEZ‐MARI F. , VIADO A. L. , AGUILAR E. , OLANO B.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation and Bioactivity of Pyrazole Derivatives as Potential Cross‐ Linking Agents.
Authors: KATAYAMA H. , OSHIYAMA T.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Medetomidine Analogues as α2‐Adrenergic Ligands. Part 3. Synthesis and Biological Evaluation of a New Series of Medetomidine Analogues and Their Potential Binding Interactions with α2‐ Adrenoceptors Involving a “Methyl Pocket”.
Authors: ZHANG X. , DE LOS ANGELES J. E. , HE M.‐Y. , DALTON J. T. , SHAMS G. , LEI L. , PATIL P. N. , FELLER D. R. , MILLER D. D. , HSU F.‐L.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Titanium(IV) Mediated One‐Pot Double Condensation Synthesis of 5,6‐Dihydro‐4H‐pyran‐4‐ones.
Authors: MORRIS J. , WISHKA D. G. , LUKE G. P. , JUDGE T. M. , GAMMILL R. B.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electrosynthesis of α‐Aminonitriles: Anodic Cyanation of N‐ Substituted Tetrahydroquinolines and N‐Phenylpiperidines.
Authors: LE GALL E. , HURVOIS J.‐P. , RENAUD T. , MOINET C. , TALLEC A. , URIAC P. , SINBANDHIT S. , TOUPET L.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Intermolecular (4π + 2π)‐Cycloadditions of Aromatic Methyleneamines.
Authors: CAMPOS P. J. , LAMAZA I. , RODIGUEZ M. A. , CANAL G.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: An Efficient Method for Generation of α‐Oxoketenes: Cycloreversion of Enolized Meldrum′s Acid Derivatives.
Authors: SATO M. , BAN H. , KANEKO C.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Activity of 6‐Substituted Purine Linker Amino Acid Immunostimulants.
Authors: ZACHARIE B. , GAGNON L. , ATTARDO G. , CONNOLLY T. P. , ST‐DENIS Y. , PENNEY C. L.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Geometrically Constrained Tetrathiafulvalenophanes: Synthesis and Characterization.
Authors: LAU J. , BLANCHARD P. , RIOU A. , JUBAULT M. , CAVA M. P. , BECHER J.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation of a Homochiral Phenolic Crown Ether Having Chiral Subunits Derived from (1R,2S)‐cis‐1,2,3,4‐Tetrahydronaphthalene‐1,2‐ diol: Temperature‐Dependent Enantioselectivity in Complexations with Neutral Amines.
Authors: NAEMURA K. , WAKEBE T. , HIROSE K. , TOBE Y.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Reactions of Bis(4,5‐benzo‐1,3‐dioxa‐2‐phospholano) dichloromethane
Authors: KRILL J. , SHEVCHENKO I. V. , FISCHER A. , JONES P. G. , SCHMUTZLER R.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemistry of the Stable Diarylstannylene (RF)2Sn (RF: 2,4,6‐Tris( trifluoromethyl)phenyl): Cycloaddition Reactions with Heterocumulenes, 3,5‐Di‐t‐butyl‐o‐benzoquinone and S4N4.
Authors: EDELMANN F. T. , BELAY M.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Novel Optically Active Tin Hydrides Containing Chiral Ligands.
Authors: SCHWARZKOPF K , METZGER J. O. , SAAK W. , POHL S.
Published: August 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Stabilities and Electronic Properties of Ice Nanotube Encapsulated in Single‐wall Carbon Nanotube
Authors: Yang Baohua , Zhang Aihua , Li Lin
Published: August 2010

The one‐dimensional n‐gon ice nanotube and its hybrid structure n‐gon@(m,n) are investigated using ab initio self‐consistent‐field crystal orbital method based on density functional theory. The study focused on the stabilities and electronic properties of ice tube and n‐gon@(m,n) complex. The results show that the pentagon and hexagon ice tubes are most stable and all the tubes are semiconductor with the band gap of −6 eV for the isolated ice nanotube. For the complex n‐gon@(m,n), the interwall spacing between the carbon nanotube and ice tube plays an important role in the stabilities of resultant structures. The most stable complex has optimum interwall spacing which is close to the van der Waals distance. The frontier energy bands of n‐gon@(m,n) complex are mainly derived from carbon nanotube and encapsulation of ice tube can not modulate the electronic properties of CNT.
Kinetics and Mechanism of Oxidation of Sarcosine by Diperiodatocuprate(III) Complex in Alkaline Medium
Authors: Shan Jinhuan , Wang Xiaoqian , Zhao Ning
Published: August 2010

The kinetics of oxidation of sarcosine by diperiodatocuprate(III) (DPC) was studied with spectrophotometry in a temperature range of 292.2–304.2 K. The reaction between diperiodatocuprate(III) and sarcosine in alkaline medium exhibits 1:1 stoichiometry (DPC:sarcosine). The reaction was found to be first order with respect to both DPC and sarcosine. The observed rate constant (kobs) decreased with the increase of the [IO−4], decreased with the increase of the [OH−], and then increased with the increase of the [OH−] after a turning point. There was no salt effect, and free radicals were detected. Based on the experimental results, a mechanism involving the diperiodatocuprate(III) (DPC) as the reactive species of the oxidant has been proposed. The activation parameters, as well as the rate constants of the rate‐determining step, have been calculated.
Preparation of Immobilized Metal Affinity Chromatographic Packings by Immobilization of Carboxymethylated Asparate (CM‐Asp) Based on Monodisperse Hydrophilic Non‐porous Beads and Their Application
Authors: Gong Bolin , Bo Chunmiao , Wang Fuqiang
Published: August 2010

The hydrophilic immobilized metal affinity chromatographic packing was prepared by immobilization of carboxymethylated asparate (CM‐Asp) as chelating ligand and Ni2+ as center ion on the base of monodispersed, 3.0 µm non‐porous monodisperse poly(glycidylmethacrylate‐co‐ethylenedimethacrylate) (PGMA/EDMA) particles. The retention behavior of proteins and the effect of pH on the retention in the range from 4.0 to 9.0 were investigated on both the naked and metal ion chelated columns. Four proteins were quickly separated in 2.0 min with linear gradient elution at a flow rate of 3.0 mL·min−1 by using the synthesized Ni2+‐CM‐Asp‐PGMA/EDMA packings. The separation time was shorter than other immobilized metal affinity chromatography reported in the literature. The Ni2+‐CM‐Asp‐PGMA/EDMA column was further investigated for the rapid separation and purification of copper‐zinc superoxide dismutase (Cu,Zn‐SOD) from the blood of pig in 3.0 min with only one step. The results obtained were satisfactory.
Efficient Allylation of Active Ketones Promoted by p‐Nitrobenzoic Acid
Authors: Xie Zhengfeng , Li Guilong , Zhao Gang , Wang Jide
Published: August 2010

A general and practical method of allylation of carbonyl compounds promoted by p‐nitrobenzoic acid under mild reaction condition has been developed. p‐Nitrobenzoic acid can be easily recovered after workup by aqueous HCl.
Synthesis and Properties of Brominated 6,6′‐Dimethyl‐[2,2′‐bi‐1H‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐diones
Authors: Chen Yong , Pang Meili , Cheng Kaige , Wang Ying , Han Jie , Meng Jiben
Published: August 2010

Photochromic 6‐bromomethyl‐6′‐methyl‐[2,2′‐bi‐1H‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione (2), 6,6′‐ bis(bromomethyl)‐[2,2′‐bi‐1H‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione (3) and 6,6′‐bis(dibromomethyl)‐[2,2′‐ bi‐1H‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione (4) have been synthesized from 6,6′‐dimethyl‐[2,2′‐bi‐1H‐ indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione (1). The single crystal of 4 was obtained and its crystal structure was analyzed. The results indicate that in crystal 4, molecular arrangement is defective tightness compared with its precursor 1. Besides, UV‐Vis absorption spectra in CH2Cl2 solution, photochromic and photomagnetic properties in solid state of 2, 3 and 4 were also investigated. The results demonstrate that when the hydrogen atoms in the methyl group on the benzene rings of biindenylidenedione were substituted by bromines, its properties could be affected considerably.
Environmentally Benign Regio‐ and Stereoselective Synthesis of Functionalized Tertiary Amines
Authors: Wang Rendong , Li Jian , Li Chunju , Liu Jun , Li Dafeng , Jia Xueshun , Zhai Hongbin
Published: August 2010

The environmentally benign, regio‐ and stereoselective synthesis of functionalized tertiary amine 3 from acetates of Baylis‐Hillman adducts with the aliphatic primary amines in the absence of any solvent and catalysts was reported.
Synthesis and Bioactivity of Novel N,N′‐Diacylhydrazine Derivatives Containing Furan (III)
Authors: Cui Zining , Zhang Li , Huang Juan , Yang Xinling , Ling Yun
Published: August 2010

42 novel diacylhydrazine derivatives containing furan were synthesized by the reaction of 5‐substituted phenyl‐2‐furoyl chloride with substituted benzohydrazide in anhydrous dichloromethane under reflux. Their structures were confirmed by IR, 1H NMR, MS and elemental analysis. Insecticidal and antitumor activity of these new compounds was evaluated. The preliminary bioassays showed that the target compounds exhibited larvicidal activity to the Mythimna separate, some of them exhibited good or moderate larvicidal activity. At the concentration of 0.1%, compounds I2, I4, I5, and III1 showed 95.0%, 90.0%, 95.0% and 95.0% larvicidal activity to Mythimna separate respectively. Some compounds such as I2, I4, I5 and III1 showed the typical IGRs' activity, which could induce the larvae premature, abnormal, and lethal larval molt. Results of anticancer activity indicated that some compounds exhibited potential activity against some human cancer cell lines, for example, I1 and IV showed good activity to the BGC‐823 and the inhibitory rates were 60.86% and 61.94% respectively at 10 µmol/L.
Synthesis and Characterization of New Adhesion Promoter for Grafting Conducting Polymer on Oxide Substrate
Authors: Cai Xuediao , Jaehne Evelin , Adler Hans‐Juergen , Guo Wenge
Published: August 2010

For grafting polypyrrole layers on oxidic substrates, the synthesis and characterization of a new adhesion promoter 11‐(pyrrol‐3‐yl) undecyl trimethoxysilane (PyTMS) were described in this article. The oxidation potential of PyTMS was determined by cyclic voltammetry. The grafting behavior of such an adhesion promoter on oxidized surface and chemical deposition of polypyrrole over the modified oxidized surface were studied. The adsorbed layer on the oxidized substrates thus formed was determined by both contact angle measurements and X‐ray photoelectron spectroscopy. Chemical polymerization of terminal pyrrole moieties on such substrates yielded adhesive polypyrrole films, and SEM image showed that the morphology of the polypyrrole films was influenced by the experimental conditions.
Photostability Study of Doxorubicin Aqueous Solution Enhanced by Inclusion Interaction between Doxorubicin and Hydroxypropyl‐β‐cyclodextrin
Authors: Peng Mingli , Liu Yanhong , Zhang Hua , Cui Yali , Zhai Gaohong , Chen Chao
Published: August 2010

The photodegradation of doxorubicin (Dox) in the presence of hydroxypropyl‐β‐cyclodextrin (HP‐β‐CD) was studied; the degradation rate constant in the presence of HP‐β‐CD estimated by Lineweaver‐Burk analysis was approximately three times lower than that of free Dox aqueous solution, which shows that HP‐β‐CD can enhance the photostability of doxorubicin aqueous solution. The enhancement may be attributed to the inclusion interaction between HP‐β‐CD and doxorubicin. The characterization of FTIR, DSC, XRD and fluorescence titration indicates that 1:1 inclusion complex is formed between HP‐β‐CD and doxorubicin.
Friction and Wear of Semi‐Crystalline Polytetrafluoroethylene with Spherulitic Micro‐Morphology
Authors: Wang Xiaoqun , Zhao Zhenlu , Chen Darong , Du Shanyi
Published: August 2010

Polytetrafluoroethylene (PTFE) is an important engineering material with a low coefficient of friction but a high rate of wear. As a semi‐crystalline polymer, its wear resistance is related to its micro‐morphology. Friction and wear properties of semi‐crystalline non‐spherulitic PTFE have been widely studied, but no investigation is reported about tribological properties of spherulitic PTFE due to difficulties in finding such properties. In this paper, friction and wear properties of PTFE with spherulitic micro‐morphology are studied for the first time. The results show that, first, under the same experimental condition, when two kinds of PTFE are rubbed against the steel disc, the number and size of debris of spherulitic PTFE are much less and smaller than that of debris of PTFE without spherulitic crystals. This means that the wear resistance of spherulitic PTFE is better than that of semi‐crystalline PTFE without spherulitic micro‐morphology. Second, the friction property of spherulitic PTFE is also different from that of PTFE without spherulitic crystals. Finally, the friction and wear mechanisms of spherulitic PTFE and non‐spherulitic PTFE are compared.