bluuebunny/crossref_metadata_2025 huggingface dataset:
Selective extraction of organic compounds from transesterification reaction mixtures by using ionic liquids
Authors: Hernández‐Fernández F. J. , de los Ríos A. P. , Gómez D. , Rubio M. , Víllora G.
Published: February 2010

In this article, we describe assays carried out to determine the suitability of 13 ionic liquids based on 1‐n‐alkyl‐3‐methylimidazolium and n‐alkylpyridinium cations and a wide range of anions (hexafluorophophate, bis{(trifluoromethyl)sulfonyl}imide, tetrafluoroborate, methylsulfate, 2(2‐methoxyethoxy)ethylsulfate, ethylsulfate, n‐octylsulfate, dicyanamide, nitrate, tetrafluoroborate and chloride) to carry out the selective separation of the organic compounds involved in a transesterification reaction (butyl butyrate, vinyl butyrate, 1‐butanol, and butyric acid) from hexane solutions. The assayed ionic liquids were shown to be suitable solvents for the selective separation of the target compounds, the extraction process being controlled by the hydrophobicity of the compounds. The anion composition of the ionic liquid was seen to strongly influence the average extraction ratio, the highest value being reached with the chloride‐based ionic liquid. As regards the cation composition of the ionic liquids, it was seen that the average distribution ratio increased with decreasing length of alkyl chain. © 2010 American Institute of Chemical Engineers AIChE J, 2010
A new route for the direct synthesis of Al2O3/SiC nanopowder mixtures by the carbothermal reduction of parent oxides
Authors: Falamaki Cavus , Tari Mehdi Heydarzadeh , Ebadzadeh Touraj
Published: February 2010

The direct synthesis of Al2O3/SiC nanopowders from the parent oxides Al2O3 and SiO2 through mullite carbothermal reduction as intermediate phase has been investigated. The effect of the amount of excess stoichiometric carbon (active charcoal, AC) as sole carbon source on the microstructure evolution has been studied. The effect of type of carbon source (AC, graphite (G), 50 wt % AC 50 wt % G mixture, 57 wt % AC 43 wt % G mixture) on the microstructure evolution was investigated using 30 wt % excess stoichiometric carbon. The effect of reaction temperature, reaction duration, initial green compact thickness, and carbon source on the mullite conversion, morphology, and surface area of the final powders has been thoroughly investigated. The calculated activation energy is in the range of 203–230 kJ mol−1, depending on the carbon source used. The synergetic effect observed for the AC/G mixtures has been accordingly explained. © 2010 American Institute of Chemical Engineers AIChE J, 2010
Mitochondrial DNA patterns in the Iberian Northern plateau: Population dynamics and substructure of the Zamora province
Authors: Alvarez Luis , Santos Cristina , Ramos Amanda , Pratdesaba Roser , Francalacci Paolo , Aluja María Pilar
Published: February 2010

Several studies have shown the importance of recent events in the configuration of the genetic landscape of a specific territory. In this context, due to the phenomena of repopulation and demographic fluctuations that took place in recent centuries, the Iberian Northern plateau is a very interesting case study. The main aim of this work is to check if recent population movements together with existing boundaries (geographical and administrative) have influenced the current genetic composition of the area. To accomplish this general purpose, mitochondrial DNA variations of 214 individuals from a population located in the Western region of the Iberian Northern plateau (the province of Zamora) were analyzed. Results showed a typical Western European mitochondrial DNA haplogroup composition. However, unexpected high frequencies of U5, HV0, and L haplogroups were found in some regions. The analyses of microdifferentiation showed that there are differences between regions, but no geographic substructure organization can be noticed. It can be stated that the differences observed in the genetic pool of the sampled area at regional level results from the mixture of different populations carrying new lineages into this area at different points in history. Am J Phys Anthropol 142:531–539, 2010. © 2010 Wiley‐Liss, Inc.
Locality and attachedness‐based temporal social network growth dynamics analysis: A case study of evolving nanotechnology scientific collaboration networks
Authors: Zhang Haizheng , Qiu Baojun , Ivanova Kristinka , Giles C. Lee , Foley Henry C. , Yen John
Published: February 2010

The rapid advancement of nanotechnology research and development during the past decade presents an excellent opportunity for a scientometric study because it can provide insights into the dynamic growth of the fast‐evolving social networks associated with this field. In this article, we describe a case study conducted on nanotechnology to discover the dynamics that govern the growth process of rapidly advancing scientific‐collaboration networks. This article starts with the definition of temporal social networks and demonstrates that the nanotechnology collaboration network, similar to other real‐world social networks, exhibits a set of intriguing static and dynamic topological properties. Inspired by the observations that in collaboration networks new connections tend to be augmented between nodes in proximity, we explore the locality elements and the attachedness factor in growing networks. In particular, we develop two distance‐based computational network growth schemes, namely the distance‐based growth model (DG) and the hybrid degree and distance‐based growth model (DDG). The DG model considers only locality element while the DDG is a hybrid model that factors into both locality and attachedness elements. The simulation results from these models indicate that both clustering coefficient rates and the average shortest distance are closely related to the edge densification rates. In addition, the hybrid DDG model exhibits higher clustering coefficient values and decreasing average shortest distance when the edge densification rate is fixed, which implies that combining locality and attachedness can better characterize the growing process of the nanotechnology community. Based on the simulation results, we conclude that social network evolution is related to both attachedness and locality factors.
Diol Appended Quenchers for Fluorescein Boronic Acid
Authors: Elfeky Souad A. , Flower Stephen E. , Masumoto Naoko , D'Hooge François , Labarthe Ludivine , Chen Wenbo , Len Christophe , James Tony D. , Fossey John S.
Published: February 2010

Fluorescein isothiocyanate is treated with 3‐aminophenylboronic acid to provide a fluorescently tagged boronic acid derivative which is used to assess Förster resonance energy transfer (FRET) quenching upon boronate ester formation with a series of bespoke diol appended quenchers. Fluorescence spectroscopy comparison of quenching efficiency between treatment of fluorescein and its boronic acid appended congener with quencher appended diol reveals boronate ester formation (covalently linked) to be the more efficient regime and from the panel of quenchers which also included nucleosides.
Short‐ and medium‐range hydrological ensemble forecasts over France
Authors: Thirel G. , Regimbeau F. , Martin E. , Noilhan J. , Habets F.
Published: February 2010

The Safran–Isba–Modcou (SIM) distributed hydro‐meteorological modeling suite is developed at Météo‐France. Two ensemble forecasts were tested as input to the SIM suite. The first one was the ECMWF EPS (10‐day range, 1.5° grid, 51 members). Then, the Météo‐France PEARP (60‐h range, 0.25° grid, 11 members) was used. The methods for disaggregating the EPSs down to the 8‐km Isba grid were described. Statistical analysis of the skills of these systems (for rainfall and streamflows) was performed against observations and showed the interests of using these EPSs. The PEARP‐based streamflows showed better scores than the ECMWF ones, for low and high flows. Copyright © 2010 Royal Meteorological Society
Dynamic and structural scalings of the complexation between pDNA and bPEI in semidilute and low‐salt solutions
Authors: Deng Rui , Diao Shu , Yue Yanan , Ngai To , Wu Chi , Jin Fan
Published: February 2010

Using a combination of static and dynamic laser light scattering, we investigated the complexation of a supercoiled plasmid DNA (pDNA, 104 bp) and a branched polyethyleneimine (bPEI, Mw = 25 kD) in semidilute and low‐salt aqueous solutions. Our results unearth some scaling laws for dynamic and structural properties of the resultant complexes (polyplexes) with different bPEI:pDNA (N:P) molar ratios. Namely, the average scattering intensity () and the average linewidth of the Rayleigh peak (<Γ>) are scaled to the scattering vector (q) as  ∝ q or <Γ> ∝ q, where αS and αD are two N:P dependent scaling exponents. The N:P ratio strongly affects the complexation. When N:P < 2.0, the motions of the negatively charged and extended pDNA chains and the polyplexes are highly correlated so that they behave like a transient network with a fractal dimension. As the N:P ratio increases, nearly all of pDNA chains condensed and the overall charge of the polyplexes reverses to slightly positive, resulting in a turbid dispersion of large loose aggregates made of smaller, but more compact, polyplexes. Further increase of N:P finally disrupts large loose aggregates, leading to a homogeneous transparent dispersion of the polyplexes. © 2010 Wiley Periodicals, Inc. Biopolymers 93: 571–577, 2010.

This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com
Pharmacokinetics of luteolin and tetra‐acetyl‐luteolin assayed by HPLC in rats after oral administration
Authors: Chen Xiujie , Liu Lei , Sun Zhizhong , Liu Yongsheng , Xu Jiankai , Liu Sibo , Huang Bangqing , Ma Ling , Yu Zhiguo , Bi Kaishun
Published: February 2010

Accurate and reproducible HPLC methods were developed and validated for the determination of concentrations of luteolin (LT) and tetra‐acetyl‐luteolin (TALT) in rat plasma. HPLC analyses were performed on an Agilent TC‐C18 column protected by a guard Agilent Zorbax Eclipse Plus. The mobile phase for LT was a binary mixture of acetonitrile–water (40:60, v/v) containing 0.5% phosphoric acid at a flow rate of 1.0 mL/min, and that for TALT was a binary mixture of methanol–water (70 : 30, v/v) containing 0.5% glacial acetic acid at the same flow rate. The UV detection wavelength for both analytes was set at 350 nm. The calibration curve was linear over the range of 40–1800 ng/mL, the lower limit of quantitation was 40 ng/mL and the lower limit of detection was 20 ng/mL for both LT and TALT. The intra‐ and inter‐day precision (RSD) values for all samples were within 7.9%. The concentration–time curves of LT and TALT after oral administration (30 mg/kg) were both fitted to a two‐compartment model. The pharmacokinetic characteristics of TALT were better than that of LT in the maximum plasma concentration (Cmax) and the area under the concentration–time curve (AUC). Copyright © 2010 John Wiley & Sons, Ltd.
First Approach to Nitrogen‐Containing Fused Aromatic Hydrocarbons as Targets for Organoelectronics Utilizing a New Transformation of O‐Protected Diaryl Methanols
Authors: Bałczewski Piotr , Bodzioch Agnieszka , Różycka‐Sokołowska Ewa , Marciniak Bernard , Uznański Paweł
Published: February 2010

A new concise approach for the construction of heteroatom analogues of polycyclic aromatic benzo[g]quinoline, benzo[b]carbazole, and pyrido[b]carbazole systems via diaryl methanols is described. This transformation involves formation of a central benzene ring fused to two aromatic 5‐ or 6‐membered rings of pyrrole and/or pyridine by using a combination of two aromatic aldehydes, of which at least one contains a ring nitrogen. Analysis of the UV and fluorescent properties, Stokes shifts, quantum yields in solution, and π‐stacking interactions in the crystal structures of the new materials was performed. These polycyclic aromatic compounds show potential as small‐molecule organoelectronic materials.
Hypergolic N,N‐Dimethylhydrazinium Ionic Liquids
Authors: Zhang Yanqiang , Gao Haixiang , Guo Yong , Joo Young‐Hyuk , Shreeve Jean'ne M.
Published: February 2010

N,N‐Dimethylhydrazinium dicyanamide and nitrocyanamide ionic liquids (ILs) were prepared by quaterization of N,N‐dimethylhydrazine with alkyl halides followed by metathesis reactions with silver dicyanamide or silver nitrocyanamide. The key physicochemical properties, such as melting point and decomposition temperatures, density, viscosity, heat of formation, detonation pressure and velocity, and specific impulse were measured/calculated. The impact of anions and alkyl‐substituted cations on these properties is demonstrated. Droplet tests with white‐fuming nitric acid (WFNA) as an oxidizer were utilized to show that the 14 new N,N‐dimethylhydrazinium salts are hypergolic with ignition delay (ID) times ranging from 22 to 1642 ms, thereby suggesting that some may have potential as bipropellants.
ChemInform Abstract: [N3MN5]q: A Type of Low‐Lying Sandwich‐Like Isomer on [N8M]q Hypersurface with (M, q) = (Ni, 0), (Co, ‐1), and (Fe, ‐2).
Authors: Jin Lin , Ding Yi‐hong
Published: February 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 Crystal Structure of a Bixbyite‐Type Solid Solution Zr0.43Er0.57O1.07N0.43.
Authors: Meyer Stefanie , Martinez Meta Neil J. , Schweda Eberhard , Eibl Oliver
Published: February 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: Polyoxothiomolybdenum Wheels as Anionic Receptors for Recognition of Sulfate and Sulfonate Anions.
Authors: Lemonnier Jean‐Francois , Floquet Sebastien , Marrot Jerome , Cadot Emmanuel
Published: February 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: Fusion of Coordination‐ and Polyoxometalate Chemistry — Chelated Cobalt(III) Centers as Structural Components of Polyoxomolybdates — [{Co(en)}4Mo10O38]4‐ and Macrocyclic [{CoII(H2O)2}{Co (en)}8{Mo20O76}]6‐.
Authors: Belai Nebebech , Kapoor Pramesh N. , Dickman Michael H. , Butcher Raymond J. , Pope Michael T.
Published: February 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: Enhanced Activity and Stereoselectivity of Polystyrene‐Supported Proline‐Based Organic Catalysts for Direct Asymmetric Aldol Reaction in Water.
Authors: Gruttadauria Michelangelo , Salvo Anna Maria Pia , Giacalone Francesco , Agrigento Paola , Noto Renato
Published: February 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: Rhodium‐Catalyzed Homocoupling of (1‐Acyloxyvinyl)silanes: Synthesis of 1,3‐Diene‐2,3‐diyl Diesters and Their Derivatives.
Authors: Yue Yanni , Yamamoto Hiroki , Yamane Motoki
Published: February 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: Rh(II)‐Catalyzed Skeletal Reorganization of 1,6‐ and 1,7‐Enynes Through Electrophilic Activation of Alkynes.
Authors: Ota Kazusa , Lee Sang Ick , Tang Jhih‐Meng , Takachi Manabu , Nakai Hiromi , Morimoto Tsumoru , Sakurai Hitoshi , Kataoka Ken , Chatani Naoto
Published: February 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: Water Mediated Chemoselective Synthesis of 1,2‐Disubstituted Benzimidazoles Using o‐Phenylenediamine and the Extended Synthesis of Quinoxalines.
Authors: Wan Jie‐Ping , Gan Shi‐Feng , Wu Jian‐Mei , Pan Yuanjiang
Published: February 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: Anionic ortho‐Fries Rearrangement, a Facile Route to Arenol‐Based Mannich Bases.
Authors: Assimomytis Nikos , Sariyannis Yiannis , Stavropoulos Georgios , Tsoungas Petros G. , Varvounis George , Cordopatis Paul
Published: February 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: The First Heterogeneous Carbonylative Stille Coupling of Organostannanes with Aryl Iodides Catalyzed by MCM‐41‐Supported Bidentate Phosphine Palladium(0) Complex.
Authors: Cai Mingzhong , Zheng Guomin , Ding Guodong
Published: February 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: Amberlyst‐15: A Mild, Efficient and Reusable Heterogeneous Catalyst for N‐tert‐Butoxycarbonylation of Amines.
Authors: Kumar K. Shiva , Iqbal Javed , Pal Manojit
Published: February 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: Direct Enantioselective Organocatalytic Hydroxymethylation of Aldehydes Catalyzed by α,α‐Diphenylprolinol Trimethylsilyl Ether.
Authors: Boeckman Robert K. Jr. , Miller John R.
Published: February 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: Asymmetric Copper(I)‐Catalyzed Henry Reaction with an Aminoindanol‐Derived Bisoxazolidine Ligand.
Authors: Spangler Kimberly Yearick , Wolf Christian
Published: February 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: The Sulfinyl Moiety in Lewis Base Promoted Allylations.
Authors: Fulton J. Robin , Kamara Lamin M. , Morton Simon C. , Rowlands Gareth J.
Published: February 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 Synthetic Methodologies. Part 187. Synthesis of α‐Aminonitriles Through Strecker Reaction of N‐Tosylaldimines Using Molecular Iodine.
Authors: Das Biswanath , Balasubramanyam Penagaluri , Krishnaiah Maddeboina , Veeranjaneyulu Boyapati , Reddy Gandolla Chinna
Published: February 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 New and Simple Synthesis of Sulfonyl Ureas from Sulfonamides and N‐Alkyl‐1,2,4‐dithiazolidine‐3,5‐diones.
Authors: Gessner Richard K. , Chibale Kelly
Published: February 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, Structures, and Characterizations of [ArTi(O‐i‐Pr)3]2 and Efficient Room‐Temperature Aryl—Aryl Coupling of Aryl Bromides with [ArTi(O‐i‐Pr)3]2 Catalyzed by the Economic Pd(OAc)2/PCy3 System.
Authors: Yang Hsu‐Tang , Zhou Shuangliu , Chang Feng‐Shuo , Chen Chi‐Ren , Gau Han‐Mou
Published: February 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: Rhodium/N‐Heterocyclic Carbene Catalyzed Direct Intermolecular Arylation of sp2 and sp3 C—H Bonds with Chelation Assistance.
Authors: Kim Min , Kwak Jaesung , Chang Sukbok
Published: February 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: Diastereo‐ and Enantioselective Synthesis of Functionalized β‐Lactams from Oxiranecarbaldimines and Lithium Ester Enolates.
Authors: Michel Kristin , Froehlich Roland , Wuerthwein Ernst‐Ulrich
Published: February 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 γ‐Lactols, γ‐Lactones and 1,4‐Monoprotected Succinaldehydes under Moderately Concentrated Sunlight.
Authors: Dondi Daniele , Protti Stefano , Albini Angelo , Carpio Sonia Manas , Fagnoni Maurizio
Published: February 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: Indirect Regioselective Heteroarylation of Indoles Through a Friedel—Crafts Reaction with (E)‐1,4‐Diaryl‐2‐buten‐1,4‐diones.
Authors: Blay Gonzalo , Fernandez Isabel , Monleon Alicia , Pedro Jose R. , Vila Carlos
Published: February 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: Recyclization of 4,5‐Diaroyl‐Substituted 1H‐Pyrrole‐2,3‐diones Effected by Benzylhydrazine.
Authors: Silaichev P. S. , Aliev Z. G. , Maslivets A. N.
Published: February 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: Polyfunctional Imidazoles. Part 1. Synthesis of 1‐Substituted 4‐Chloro‐1H‐imidazole‐5‐carbaldehydes by Vilsmeier—Haack Reaction.
Authors: Chornous V. A. , Bratenko M. K. , Vovk M. V.
Published: February 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: Unusual Reactions of Vinyl Ketones with Tetranitromethane. The Synthesis of 5‐Acyl‐3‐nitroisoxazoles.
Authors: Volkova Yu. A. , Ivanova O. A. , Budynina E. M. , Averina E. B. , Kuznetsova T. S. , Zefirov N. S.
Published: February 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: N‐Heterocyclic Carbene‐Catalyzed Generation of α,β‐Unsaturated Acyl Imidazoliums: Synthesis of Dihydropyranones by Their Reaction with Enolates.
Authors: Ryan Sarah J. , Candish Lisa , Lupton David W.
Published: February 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 One‐Pot Synthesis of Highly Differently Substituted Thiochromans.
Authors: Seifert Andrea , Mahrwald Rainer
Published: February 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 4‐Heteroaryl‐4‐cyanopiperidines via SNAr Substitution Reactions.
Authors: Chang Ronald K. , Di Marco Christina N. , Pitts Daniel R. , Greshock Thomas J. , Kuduk Scott D.
Published: February 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: Nitropyridines. Part 6. Synthesis of 2‐Aryl(hetaryl)‐ and 2,3‐Polymethylene‐5‐nitropyridines.
Authors: Sagitullina G. P. , Garkushenko A. K. , Vinokurova Yu. O. , Nyrkova V. A. , Atavin E. G. , Sagitullin R. S.
Published: February 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 Multicomponent Coupling Sequence for Direct Access to Substituted Quinolines.
Authors: Majumder Supriyo , Gipson Kevin R. , Odom Aaron L.
Published: February 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: Efficient One‐Pot Synthesis of 2,3‐Dihydropyrimidinthiones via Multicomponent Coupling of Terminal Alkynes, Elemental Sulfur, and Carbodiimides.
Authors: Wang Zitao , Wang Yang , Zhang Wen‐Xiong , Hou Zhaomin , Xi Zhenfeng
Published: February 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 N,N‐Dimethyl(diethyl)‐7‐aryl‐5‐methyl‐4,7‐dihydrotetrazolo [1,5‐a]pyrimidine‐6‐carboxamides
Authors: Gein V. L. , Zamaraeva T. M. , Zorina A. A. , Levandovskaya E. B. , Nosova N. V. , Vakhrin M. I.
Published: February 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 New Thiazolopyrimidines Proceeding from 4‐Aryl‐Substituted 3,4‐Dihydropyrimidine‐2(1H)‐thiones.
Authors: Kulakov I. V.
Published: February 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: Design and One‐Pot Synthesis of α‐Aminophosphonates and Bis(α‐aminophosphonates) by Iron(III) Chloride and Cytotoxic Activity.
Authors: Rezaei Zahra , Firouzabadi Habib , Iranpoor Nasser , Ghaderi Abbas , Jafari Mohammad Reza , Jafari Abbas Ali , Zare Hamid Reza
Published: February 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: Catalytic Synthesis of α‐Hydroxyphosphonates
Authors: Kabachnik M. M. , Minaeva L. I. , Beletskaya I. P.
Published: February 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: Eco‐Friendly Cross‐Coupling of Diaryl Diselenides with Aryl and Alkyl Bromides Catalyzed by CuO Nanopowder in Ionic Liquid.
Authors: Singh Devender , Alberto Eduardo E. , Rodrigues Oscar Endrigo Dorneles , Braga Antonio Luiz
Published: February 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: New β‐Class Milbemycin Compound from Streptomyces avermitilis NEAU1069: Fermentation, Isolation and Structure Elucidation.
Authors: Wang Ming , Yang Xiao‐Hu , Wang Ji‐Dong , Wang Xiang‐Jing , Chen Zheng‐Jie , Xiang Wen‐Sheng
Published: February 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: Isolation of the Protein Tyrosine Phosphatase 1B Inhibitory Metabolite from the Marine‐Derived Fungus Cosmospora sp. SF‐5060.
Authors: Seo Changon , Sohn Jae Hak , Oh Hyuncheol , Kim Bo Yeon , Ahn Jong Seog
Published: February 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: Discovery of 4‐Functionalized Phenyl‐O‐β‐D‐glycosides as a New Class of Mushroom Tyrosinase Inhibitors.
Authors: Yi Wei , Cao Rihui , Wen Huan , Yan Qin , Zhou Binhua , Ma Lin , Song Huacan
Published: February 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 Stabilization of Nano‐Sized Titanium Dioxide
Authors: Ismagilov Z. R. , Tsikoza L. T. , Shikina N. V. , Zarytova V. F. , Zinoviev V. V. , Zagrebelnyi S. N.
Published: February 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: Organic Syntheses Catalyzed by Superacidic Metal Oxides: Sulfated Zirconia and Related Compounds
Authors: Arata Kazushi
Published: February 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: Metal‐Catalyzed Coupling Reactions with Aryl Chlorides, Tosylates and Fluorides
Authors: Littke Adam
Published: February 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: Trefoil Factor Family (TFF) Peptides and Chemokine Receptors: A Promising Relationship.
Authors: Hoffmann Werner
Published: February 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: Manganese(III)‐Promoted Reactions for Formation of Carbon—Heteroatom Bonds
Authors: Pan Xiang‐Qiang , Zou Jian‐Ping , Zhang Wei
Published: February 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: Deoxyribozymes: Selection Design and Serendipity in the Development of DNA Catalysts
Authors: Silverman Scott K.
Published: February 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: Measurement and Prediction of Oral Absorption.
Authors: Keldenich Joerg
Published: February 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: Addressing Central Nervous System (CNS) Penetration in Drug Discovery: Basics and Implications of the Evolving New Concept.
Authors: Reichel Andreas
Published: February 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: Health Effects Associated with Wastewater Treatment, Reuse, and Disposal
Authors: Ikehata Keisuke , Liu Yang , Sun Ruonan
Published: February 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.
Synthesis and Characterization of New Soluble Polyamides from 9,9‐Bis[4‐(chloroformylphenoxy)phenyl]xanthene and Various Aromatic Diamines
Authors: Jiang Jianwen , Huang Shuiping , Liu Yuan , Sheng Shouri , Huang Zhenzhong , Song Caisheng
Published: February 2010

9,9‐Bis(4‐hydroxyphenyl)xanthene (BHPX) was synthesized in 82% yield from xanthenone in a one‐pot, two‐step synthetic procedure. A new diacyl chloride monomer, 9,9‐bis[4‐(chloroformylphenoxy)phenyl]xanthene (BCPX), was synthesized in three steps from the nucleophilic fluorodisplacement of 4‐fluorobenzonitrile with the dipotassium bisphenolate of BHPX, followed by alkaline hydrolysis of the intermediate bis(ether nitrile), and then chlorination with thionyl chloride. Several novel aromatic polyamides containing ether and bulky xanthene groups with the inherent viscosities (0.72–0.98 dL/g) were prepared by the low temperature polycondensation of BCPX with various aromatic diamines in N,N‐dimethylacetamide (DMAc) solution containing pyridine (Py). All new polyamides were amorphous and readily soluble in various polar solvents such as DMAc, N,N‐dimethylformamide (DMF), N‐methyl‐2‐pyrrolidone (NMP) and Py. These polymers showed relatively high glass transition temperatures between 236 and 298°C, decomposition temperatures at 10% weight loss ranging from 490 to 535°C and 483 to 515°C in nitrogen and air, respectively, and char yields at 700°C in nitrogen higher than 50%. Transparent, flexible, and tough films of these polymers cast from DMAc solutions exhibited tensile strengths ranging from 82 to 106 MPa, elongations at break from 10% to 25%, and initial moduli from 2.0 to 2.8 GPa.
Performance Improvement of Organic Light Emitting Diodes Using Poly(N‐vinylcarbazole) (PVK) as a Blocking Layer
Authors: Lee Joo‐Won , Kim Jai‐Kyeong , Yoon Young‐Soo
Published: February 2010

High efficiency organic light‐emitting‐devices (OLED) have been fabricated by incorporation of a polymeric layer as a controller of the unbalanced charge. In device configuration of ITO/PEDOT:PSS/PVK/Alq3/LiF:Al, poly(N‐vinylcarbazole) (PVK) was selected as a block‐ing layer (BL) because it has a hole transporting property and a higher band gap, especially a lower LUMO level than the emitting layer (Alq3) and a higher HOMO level than the hole injection layer (PEDOT: PSS). As a result, the optimal structure with this bl layer showed a peak efficiency of 6.89 cd/A and 2.30 lm/W compared to the device without the PVK layer of 1.08 cd/A, 0.27 lm/W. This result shows that the PVK layer could effec‐tively block the electrons from metal cathode and confine them in the emitting layer and accomplish the charge balance, which leads to enhanced hole‐electron balance for achieving high recombination efficiency.
Enantioselective Partitioning of Racemic Ibuprofen in a Biphasic Recognition Chiral Extraction System
Authors: Tang Kewen , Song Litao , Pan Yang , Jiang Xinyu , Miao Jiabing
Published: February 2010

Enantioselective partitioning of ibuprofen enantiomers in a biphasic recognition chiral extraction system was studied. A combination of hydrophobic L‐isobutyl tartrate in organic phase and hydrophilic β‐cyclodextrin derivative in aqueous phase is necessary to establish a biphasic recognition chiral extraction system. The studies performed involve an enantioselective extraction in a biphasic system, where ibuprofen enantiomers form four complexes with the β‐cyclodextrin derivative in aqueous phase and the D(L)‐isobutyl tartrate in organic phase, respectively. In these biphasic resolutions, the types and the concentrations of the extractants, pH and temperature all exert a considerable influence on the biphasic recognition process. Good enantioselectivities for ibuprofen enantiomers were obtained at pH≦2.5 and a ratio of 2:1 of [L‐isobutyl tartrate] to [HP‐β‐CD]. Biphasic recognition chiral extraction is of strong chiral separation ability, and may be very helpful to optimize the extraction systems and realize the large‐scale production of enantiomers.
An Efficient Synthesis of N‐Arylsulfonylindoles from Indoles and Arylsulfonyl Chlorides in the Presence of Triethyl‐benzylammonium Chloride (TEBA) and NaOH
Authors: Xu Hui , Wang Yangyang
Published: February 2010

An efficient synthesis of N‐arylsulfonylindoles from indoles and arylsulfonyl chlorides in the presence of triethylbenzylammonium chloride (TEBA) and NaOH at room temperature is described.
Pd/C‐catalyzed Reductive Mono‐N‐alkylation of Nitrophenol Derivatives in One‐pot Way
Authors: Jin Zhonghao , Li Dao , Wang Xingyi , Xiao Qin
Published: February 2010

A range of different nitrophenol derivatives were converted in one‐pot to the corresponding secondary alkyl aminophenols in good to excellent yields by using ketones as alkyl source and hydrogen over 10 wt% Pd/C as reducing agent. In all examples, except for one, the secondary amine was the sole alkylation product isolated. When aldehydes were used as alkyl source, the corresponding tertiary amine as a sole alkylation product was isolated.
Molecular Dynamics Simulation of HIV‐1 Integrase Dimer Complexed with Viral DNA
Authors: Hu Jianping , Wang Cunxin
Published: February 2010

The biological function of HIV‐1 integrase (IN) is to integrate viral DNA into the host cell chromosome, and the specific binding of IN with viral DNA is a precondition for IN to function correctly. Beforehand, the binding mode of IN dimer (IN2) with the 27 bp segment of viral DNA before 3′ processing (3′‐P) was obtained via a molecular docking method. Based on the binding mode, the aim of this article was to explore the changes of motive mode and correlative motion for the IN2 and DNA systems after their binding through dynamical cross‐correlation map (DCCM) and principal component analysis (PCA). Finally, solvent effect during the association was analyzed briefly. The results show that there is a significantly increased positive correlation in the interface region between IN2 and viral DNA, and some obvious motive mode changes of the two systems (IN2 and DNA) were also observed after their binding. It was found that water molecules played an important role in the recognition between IN2 and viral DNA through analyzing the water‐mediated hydrogen bonds.
Synthesis, Structure and Anticancer Activity Studies of 1‐[(5‐Bromo‐2‐thienyl)sulfonyl]‐5‐fluoro‐1,2,3,4‐tetrahydropyrimidine‐2,4‐dione
Authors: Miao Qian , Yan Xiaowei , Zhao Kejian
Published: February 2010

An anticancer active compound 1‐[(5‐bromo‐2‐thienyl)sulfonyl]‐5‐fluoro‐1,2,3,4‐tetrahydropyrimidine‐2,4‐dione (1) was synthesized by the modified Schotten‐Baumann reaction of 5‐fluorouracil with 5‐bromo‐2‐thienyl‐sulfonyl chloride and characterized by elemental analysis, IR, 1H and 13C NMR spectra. The single crystal X‐ray diffraction analysis shows that the title molecule forms a two dimensional sheet structure by three kinds of hydrogen bond interactions. Its thermal stability was studied by TGA technique. Based on inhibition ratio against cancer cell growth, compound 1 has obvious anticarcinogenic activity against HL‐60 and BEL‐7402 cancer cells.
Microwave Assisted One‐pot Synthesis of 2‐Amino‐4H‐chromenes and Spiropyrano[2,3‐d]pyrimidine
Authors: Mahmoud Alaa F. , Abd El‐Latif Fathy F. , Ahmed Amira M.
Published: February 2010

A convenient and efficient method using microwave assisted one pot synthesis reactions for synthesis of 4H‐benzo[f]chromenes by the reaction of aromatic aldehydes with a mixture of malononitrile and naphthols was examined. The synthesis of spiropyrano[2,3‐d]pyrimidines by the reaction of isatin with malononitrile and barbituric acid and/or thiobarbituric acid was investigated. The versatility of the method was also examined through the reaction of aromatic aldehydes and malononitrile with various reagents.
An implicit LU‐SGS spectral volume method for the moment models in device simulations: Formulation in 1D and application to a p‐multigrid algorithm
Authors: Kannan Ravishekar
Published: February 2010

A high‐order spectral volume (SV) method was implemented for solving the steady‐state moment models, such as the hydrodynamic (HD) models and the energy transport (ET) models for semiconductor device simulations (in 1D). The first derivative inviscid/convective fluxes are handled using an approximate Riemann flux and the second derivative diffusive fluxes are discretized using the local discontinuous Galerkin formulation (LDG). The LDG method is also used for discretizing the potential equation. An implicit pre‐conditioned LU‐SGS p‐multigrid method developed for the SV Navier–Stokes (NS) solver by Kannan and Wang is adopted here for time marching. The entire formulation is compact and hence can be easily parallelized. A n+‐n‐n+ diode was assumed for simulation purposes and the results are compared with the existing discontinuous Galerkin simulation results. In general, the numerical results are very promising and indicate that the approach has a great potential for higher‐dimensional device problems. Copyright © 2010 John Wiley & Sons, Ltd.