bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Copper‐Catalyzed Double Borylation of Silylacetylenes: Highly Regio‐ and Stereoselective Synthesis of syn‐Vicinal Diboronates.
Authors: Jung Ho‐Young , Yun Jaesook 
Published: August 2012

AbstractIn the presence of copper catalyst, silylacetylene and aryl‐substituted alkynylsilanes undergo regio‐ and stereoselective bis‐borylation to afford products of type (III)/(V).
ChemInform Abstract: Ruthenium‐Catalyzed Orthoselective Aromatic C—H Silylation: Acceptorless Dehydrogenative Coupling of Hydrosilanes.
Authors: Sakurai Toru , Matsuoka Yusuke , Hanataka Tsurugi , Fukuyama Naoaki , Namikoshi Takeshi , Watanabe Shinji , Murata Miki 
Published: August 2012

AbstractThe intermolecular dehydrogenative coupling of trisiloxane (II) with aromatic compounds such as arylimines (I) and aryloxazolines (VI) in the presence of a Ru‐catalyst affords the corresponding ortho‐silylated products in good yields.
ChemInform Abstract: Hybrid Metal/Organo Relay Catalysis Enables Enynes To Be Latent Dienes for Asymmetric Diels—Alder Reaction.
Authors: Han Zhi‐Yong , Chen Dian‐Feng , Wang Ya‐Yi , Guo Rui , Wang Pu‐Sheng , Wang Chao , Gong Liu‐Zhu 
Published: August 2012

AbstractGold complex BPG in combination with chiral Broensted acid PHA catalyzes the title reaction of enynyl silanols with either naphthoquinone or quinones to give penta‐ and tetracyclic oxasiline derivatives, correspondingly, as single diastereomers and with excellent enantioselectivities.
ChemInform Abstract: Synthesis and Antitumor Activity of 3‐[(Methyl)bis(5‐trialkylsilylfuran‐2‐yl)silyl]propylamines.
Authors: Ignatovich L. , Romanov V. , Spura J. , Propelis J. , Domracheva I. , Shestakova I. 
Published: August 2012

AbstractThe title compounds (V) (8 examples) are obtained by hydrosilylation of aliphatic and heterocyclic N‐alkylamines in the presence of Speier′s catalyst.
ChemInform Abstract: Base‐Catalyzed Direct Aldolization of α‐Alkyl‐α‐hydroxy Trialkyl Phosphonoacetates.
Authors: Corbett Michael T. , Uraguchi Daisuke , Ooi Takashi , Johnson Jeffrey S. 
Published: August 2012

AbstractThe direct addition of the title phosphonoacetates to aldehydes is based on the in situ generation of reactive glycolate enolate intermediates by a [1,2] phosphonate—phosphate rearrangement to give α‐hydroxy β‐phosphonyloxy esters with modest diastereoselectivities.
ChemInform Abstract: Synthesis of Cyclotriphosphazenes Containing Cyanostilbenes with Different Terminal Substituents.
Authors: Bao Rui , Pan Min , Zhou Yun , Qiu Jin‐Jun , Tang He‐Qing , Liu Cheng‐Mei 
Published: August 2012

AbstractCyclotriphosphazenes (IVa) and (IVb) with terminal substituents exhibit nematic phases.
ChemInform Abstract: Superbase‐Assisted Addition of Phosphine to 1‐Methoxy‐4‐vinylbenzene: Toward a Rare Family of Organic Phosphines.
Authors: Malysheva S. F. , Gusarova N. K. , Artem'ev A. V. , Belogorlova N. A. , Smirnov V. I. , Shagun V. A. , Kuimov V. A. , Trofimov B. A. 
Published: August 2012

AbstractGaseous phosphine reacts with p‐methoxystyrene at 70°C to afford bis(methoxyphenylethyl)phosphine (II) in high yield.
ChemInform Abstract: Stereocontrolled 1,3‐Phosphatyloxy and 1,3‐Halogen Migration Relay Toward Highly Functionalized 1,3‐Dienes.
Authors: Shiroodi Roohollah Kazem , Dudnik Alexander S. , Gevorgyan Vladimir 
Published: August 2012

AbstractThe first example of 1,3‐migration of iodine is presented, cf.
ChemInform Abstract: Synthesis of 3‐Fluoro‐2‐(diethoxyphosphoryl)imidazo[1,2‐a]pyridine.
Authors: Aksinenko Alexei Yu. , Goreva Tatyana V. , Epishina Tatyana A. , Sokolov Vladimir B. 
Published: August 2012

AbstractThe Arbuzov and defluorocyclization reaction are combined for the synthesis of the first representative of 3‐fluoro‐2‐(dialkoxyphosphoryl)imidazopyridines (V).
ChemInform Abstract: A Zinc Porphyrin‐Based Molecular Probe for the Determination of Contamination in Commercial Acetonitrile.
Authors: Yoon Hongsik , Lee Chi‐Hwa , Jeong Young‐Hwan , Gee Hyuk‐Chan , Jang Woo‐Dong 
Published: August 2012

AbstractBy means of charting the absorption spectrum in MeCN, the cyanide contamination concentration can be directly determined.
ChemInform Abstract: Olean‐18‐ene Triterpenoids from Celastraceae Species Inhibit HIV Replication Targeting NF‐kB and Sp1 Dependent Transcription.
Authors: Osorio Alex A. , Munoz Alejandro , Torres‐Romero David , Bedoya Luis M. , Perestelo Nayra R. , Jimenez Ignacio A. , Alcami Jose , Bazzocchi Isabel L. 
Published: August 2012

AbstractAmong nine new oleanene triterpenes, isolated from the stems of C.
ChemInform Abstract: Nonnatural Amino Acid Synthesis by Using Carbon—Hydrogen Bond Functionalization Methodology.
Authors: Tran Ly Dieu , Daugulis Olafs 
Published: August 2012

AbstractSyntheses of substituted phenylalanine derivatives (III) are highly convergent and employ an N‐phthaloylalanine with a 2‐thiomethylaniline directing group.
ChemInform Abstract: Pyronepolyene C‐Glucosides with NF‐ϰB Inhibitory and anti‐Influenza A Viral (H1N1) Activities from the Sponge‐Associated Fungus Epicoccum sp. JJY40.
Authors: Peng Jixing , Jiao Jieying , Li Jing , Wang Wei , Gu Qianqun , Zhu Tianjiao , Li Dehai 
Published: August 2012

AbstractA new pyronepolyene C‐glucoside, iso‐D8646‐2‐6 (I), is isolated together with the known related compound D8646‐2‐6.
ChemInform Abstract: Acremolin, a New 1H‐Azirine Metabolite from the Marine‐Derived Fungus Acremonium strictum.
Authors: Julianti Elin , Oh Hana , Lee Hyi‐Seung , Oh Dong‐Chan , Oh Ki‐Bong , Shin Jongheon 
Published: August 2012

AbstractThe component is inactive against Gram‐positive and Gram‐negative bacteria, but exhibits weak cytotoxicity against an A54 cell line.
ChemInform Abstract: Alternative Mild Route to the Synthesis of 4‐Methylenecyclohex‐2‐enone, a Key Moiety of the Anticancer Compounds Ottelione A and B.
Authors: Lestini Elena , Robertson Keith , Murphy Cormac D. , Paradisi Francesca 
Published: August 2012

AbstractKey feature of this synthesis is the iodide‐induced formation of the highly conjugated ketone (V) from mesylate (IVa).
ChemInform Abstract: Cytotoxic Cytochalasins from the Endozoic Fungus Phoma sp. of the Giant Jellyfish Nemopilema nomurai.
Authors: Jung Jee H. , et al. et al. 
Published: August 2012

AbstractCytochalasin B2 (I), deoxaphomin B (II), deoxaphomin C (III) and 20‐deoxycytochalasin F (IV) are isolated together with known cytochalasin B.
ChemInform Abstract: Design, Synthesis and Biological Evaluation of Thiazole‐ and Indole‐Based Derivatives for the Treatment of Type II Diabetes.
Authors: Chen Lijuan , et al. et al. 
Published: August 2012

AbstractThirty eight thiazole‐ and indole‐based derivatives are prepared and examined for their inhibitory effects on the production of LPS‐induced TNF‐α.
ChemInform Abstract: Progresses in the Pursuit of Aldose Reductase Inhibitors: The Structure‐Based Lead Optimization Step.
Authors: Marinelli Luciana , et al. et al. 
Published: August 2012

AbstractStarting from the virtual screening‐derived aldose reductase2 inhibitor S12728, a rational receptor‐based lead optimization results in the discovery of compounds (I) endowed with low micromolar/submicromolar activities.
ChemInform Abstract: Novel Pyrrolopyrimidine Analogues as Potent Dipeptidyl Peptidase IV Inhibitors Based on Pharmacokinetic Property‐Driven Optimization.
Authors: Hu Wenhui , et al. et al. 
Published: August 2012

AbstractReplacement of the thienopyrimidine scaffold of recently reported dipeptidyl peptidase IV inhibitors with a pyrrolopyrimidine system improves the metabolic stability of the remaining parent in model liver microsomes, while resulting in poor absorption.
ChemInform Abstract: Fluorescence Response of Alkaloids and DAPI on Inclusion in Cucurbit[7]uril: Utilization for the Study of the Encapsulation of Ionic Liquid Cations
Authors: Biczok Laszlo , Wintgens Veronique , Miskolczy Zsombor , Megyesi Monika 
Published: August 2012

AbstractReview: 74 refs.
Gaussian Free Field in an Interlacing Particle System with Two Jump Rates
Authors: Duits Maurice 
Published: August 2012

AbstractWe study the fluctuations of a random surface in a stochastic growth model on a system of interlacing particles placed on a two‐dimensional lattice. There are two different types of particles, one with a low jump rate and the other with a high jump rate. In the large time limit, the random surface has a deterministic shape. Due to the different jump rates, the limit shape and the domain on which it is defined are not smooth. The main result is that the fluctuations of the random surface are governed by the Gaussian free field. © 2012 Wiley Periodicals, Inc.
Hydrothermal Reaction Kinetics and Pathways of Phenylalanine Alone and in Binary Mixtures
Authors: Changi Shujauddin , Zhu Minghan , Savage Phillip E. 
Published: August 2012

AbstractWe examined the behavior of phenylalanine in high‐temperature water (HTW) at 220, 250, 280, and 350 °C. Under these conditions, the major product is phenylethylamine. The minor products include styrene and phenylethanol (1‐phenylethanol and 2‐phenylethanol), which appear at higher temperatures and longer batch holding times. Phenylethylamine forms via decarboxylation of phenylalanine, styrene forms via deamination of phenylethylamine, and phenylethanol forms via hydration of styrene. We quantified the molar yields of each product at the four temperatures, and the carbon recovery was between 80–100 % for most cases. Phenylalanine disappearance follows first‐order kinetics with an activation energy of 144±14 kJ mol−1 and a pre‐exponential factor of 1012.4±1.4 min−1. A kinetics model based on the proposed pathways was consistent with the experimental data. Effects of five different salts (NaCl, NaNO3, Na2SO4, KCl, K2HPO4) and boric acid (H3BO3) on phenylalanine behavior at 250 °C have also been elucidated. These additives increase phenylalanine conversion, but decrease the yield of phenylethylamine presumably by promoting formation of high molecular weight compounds. Lastly, binary mixtures of phenylalanine and ethyl oleate have been studied at 350 °C and three different molar concentration ratios. The presence of phenylalanine enhances the conversion of ethyl oleate and molar yields of fatty acid. Higher concentration of ethyl oleate leads to increased deamination of phenylethylamine and hydration of styrene. Amides are also formed due to the interaction of oleic acid/ethyl oleate and phenylethylamine/ammonia and lead to a decrease in the fatty acid yields. Taken collectively, these results provide new insights into the reactions of algae during its hydrothermal liquefaction to produce crude bio‐oil.
The Synthesis and the Chemical and Physical Properties of Non‐Aqueous Silylamine Solvents for Carbon Dioxide Capture
Authors: Rohan Amy L. , Switzer Jackson R. , Flack Kyle M. , Hart Ryan J. , Sivaswamy Swetha , Biddinger Elizabeth J. , Talreja Manish , Verma Manjusha , Faltermeier Sean , Nielsen Paul T. , Pollet Pamela , Schuette George F. , Eckert Charles A. , Liotta Charles L. 
Published: August 2012

AbstractSilylamine reversible ionic liquids were designed to achieve specific physical properties in order to address effective CO2 capture. The reversible ionic liquid systems reported herein represent a class of switchable solvents where a relatively non‐polar silylamine (molecular liquid) is reversibly transformed to a reversible ionic liquid (RevIL) by reaction with CO2 (chemisorption). The RevILs can further capture additional CO2 through physical absorption (physisorption). The effects of changes in structure on (1) the CO2 capture capacity (chemisorption and physisorption), (2) the viscosity of the solvent systems at partial and total conversion to the ionic liquid state, (3) the energy required for reversing the CO2 capture process, and (4) the ability to recycle the solvents systems are reported.
Identification and characterization of 2,5‐dimethoxy‐3,4‐dimethyl‐β‐phenethylamine (2C‐G) – A new designer drug
Authors: Zuba Dariusz , Sekuła Karolina 
Published: August 2012

This study presents and discusses the mass spectrometric, infrared spectroscopic and nuclear magnetic resonance spectroscopic data of 2,5‐dimethoxy‐3,4‐dimethyl‐β‐phenethylamine (2C‐G), a new designer drug. A powder sample containing 2C‐G was seized in Poland in 2011. The paper focuses on a comparison of the analytical features of 2C‐G and other members of the 2C‐series, in order to assess the possibility of unequivocal identification. The occurrence of intense peak at m/z = 178 and different intensities of the ions at m/z = 165 and 180 in the gas chromatography‐electron impact‐mass spectrometry (GC‐EI/MS) spectrum of 2C‐G made it possible to distinguish it from 2C‐E. Differences in relative intensities of the ions at m/z = 192, 179 and 177 were observed for GC‐EI/MS spectra of TFAA derivatives of 2C‐G and 2C‐E. An identical set of ions was recorded for these substances using the liquid chromatography‐electrospray ionization/quadrupole time of flight mass spectrometry (LC‐ESI/QTOFMS) method in both MS and tandem mass spectrometry (MS/MS) mode, but the distinction was possible based on differences in the ion intensities at m/z = 193.1223 and 178.0988. The Fourier transform infrared (FTIR) spectrum of 2C‐G was significantly different from other members of the 2C‐series, with a characteristic doublets at 993–1014 cm‐1 and 1099–1124 cm‐1, and the ratio of bands at higher wavenumbers. Final elucidation of the structure of 2C‐G was carried out by 1H and 13C NMR spectroscopy.The study indicated that the marketing of analogues of controlled substances poses a real analytical challenge for forensic laboratories, and the application of sophisticated methods is often required for unequivocal identification of a new substance. Copyright © 2012 John Wiley & Sons, Ltd.
Influence of contrasting riparian forest cover on stream temperature dynamics in salmonid spawning and nursery streams
Authors: Imholt C. , Soulsby C. , Malcolm I.A. , Gibbins C.N. 
Published: August 2012

ABSTRACTIn this paper, we investigated the influence of contrasting riparian forest types on upland stream temperatures and the links between thermal regime and standard indices of forest cover. Stream temperature was measured for two hydrological years at multiple sites along two tributaries of the River Dee, Scotland. Riparian cover in the upper reaches of both streams was dominated by Calluna moorland while the lower sections comprised either dense alluvial broadleaved forest (Girnock Burn) or native Scots Pine stands (Tanar). The Point‐Centered‐Quarter Method was used to quantify stem density (SD) and tree coverage (TC) as an indicator of channel shading comprising either dense alluvial broadleaved forest (Girnock Burn) or native Scots Pine stands (Tanar). The greatest reductions in maximum temperature (4 °C) and diel amplitude (6·6°C) were observed where TC and SD were greatest in areas of relatively dense broadleaved riparian cover. Analysis of the relationship between forest characteristics and temperature summary statistics revealed that SD and TC were significant predictors of mean and maximum temperatures, as well as daily temperature ranges for both rivers during the summer. The relationship between summer thermal indices and indicators of channel shading (SD or TC) was independent of forest type. However, as SD and TC were greater in the deciduous reaches of Glen Girnock than the mature Scots pine reaches of Glen Tanar, maximum reductions in stream temperature were greater in Glen Girnock. Given that maximum temperatures were strongly influenced by measures of shading, it suggested that riparian planting may offer a suitable mitigation against high temperatures under climate change. Copyright © 2012 John Wiley & Sons, Ltd.
Relating extremes of flow and air temperature to stream fish communities
Authors: Jones Nicholas E. , Petreman Ian C. 
Published: August 2012

ABSTRACTThe disruptive potential of floods, drought, ice, and high water temperature on fishes in streams have been well documented. We examined the relationship between unexpected high flow events, low flow events coupled with low and high air temperature events, and a variety of ecological measures frequently used to quantify fish communities in streams, e.g. density. We developed a severity index to quantify concurrent extreme disturbances occurring over annual and summer periods. We anticipated that years or summers of high severity would result in changes in the fish community measures, e.g. low abundance. Despite the occurrence of severe events, there were relatively few instances of environmental severity resulting in consistent negative/positive changes in fish communities. Of the fish community measures, young‐of‐the‐year (YOY) growth was most responsive to extremes. Low flow in combination with high temperature events significantly lowered YOY growth; whereas, unexpected high flows increased growth. Unexpected high flow events were associated with a significant negative effect on fish abundance and positive effects on biomass, YOY growth, and diversity during the summer period. The predictive power of abiotic–biotic regressions from the summer time period was generally greater than that from the annual time period. We suggest that high amounts of groundwater flow into the streams may buffer the impact of extreme environmental conditions. Our methodology of measuring extremes in flow and air temperature could be implemented over much larger scales for use in long‐term monitoring impacts related to climate and land use change. Copyright © Her Majesty the Queen in Right of Canada 2012
Quantitative method for evaluating generation margin for power system planning
Authors: Su Su , Tanaka Kazuyuki 
Published: August 2012

AbstractAs the power system advances, the competition among the power companies becomes heated, and they seek more efficient system planning using existing facilities. Therefore, an efficient system planning method is desirable. This paper proposes a quantitative evaluation method for the (N–1) generation margin considering overload and voltage stability constraints. Concerning the generation margin related to overload, a fast solution method without recalculation of the (N–1) Y‐matrix is proposed. With reference to voltage stability, this paper proposes an efficient method of seeking the stability limit. The IEEE30 model system, composed of six generators and 14 load nodes, is employed to validate the proposed method. According to the results, the proposed method can reduce the computational cost for obtaining the generation margin related to the overload and the voltage stability limit under the (N–1) condition, and can specify the value quantitatively. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 181(4): 19–28, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). doi 10.1002/eej.21234
A Shack–Hartmann laser wavefront sensor for measuring electron density in low‐current arc
Authors: Inada Yuki , Matsumoto Hirokazu , Matsuoka Shigeyasu , Kumada Akiko , Ikeda Hisatoshi , Hidaka Kunihiko 
Published: August 2012

AbstractTo determine electron densities in low current arcs, a Shack–Hartmann laser wavefront sensor was developed, improved in terms of measurement accuracy, and applied to atmospheric arcs with a peak current of 0.8 kA. The electron density in the pre‐extinguishing phase was 5 × 1023 m−3 at the gap center when the instantaneous current decreased to 0.1 kA. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 181(4): 1–8, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22319
Capacity design of distributed battery storage for controlling power variation with large‐scale photovoltaic sources in distribution network
Authors: Kobayashi Yasuhiro , Sawa Toshiyuki , Gunji Keiko , Yamazaki Jun , Watanabe Masahiro 
Published: August 2012

AbstractWe developed a method for the design of distributed battery storage capacity for evaluating battery storage with demand–supply imbalance control in distribution systems to which large‐scale home photovoltaic power generators are connected. The proposed method is based on a linear storage capacity minimization model with design‐basis demand load and photovoltaic output time series subject to battery management constraints.We experimentally applied the design method to a sample distribution system with substation storage and terminal area storage. The developed method successfully reveals the charge–discharge schedule and stored power variation for design‐basis demand load and photovoltaic output, satisfies the peak‐cut requirement, and pinpoints the minimum distributed storage capacity. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 181(4): 29–37, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22324
First “Click” Synthesis of the Ribbed‐Functionalized Metal Clathrochelates: Cycloaddition of Benzyl Azide to Propargylamine Iron(II) Macrobicycle and the Unexpected Transformations of the Resulting Cage Complex
Authors: Belov Alexander S. , Prikhod'ko Alexander I. , Novikov Valentin V. , Vologzhanina Anna V. , Bubnov Yurii N. , Voloshin Yan Z. 
Published: August 2012

AbstractA bis(propargylamine) iron(II) cage complex was obtained in high yield by nucleophilic substitution of reactive chlorine atoms of its dichloroclathrochelate precursor with an excess of propargylamine in acetonitrile. The macrobicyclic product undergoes copper(I)‐catalyzed “click” reaction with benzyl azide giving the copper(II)‐containing complex of the bis(benzyl‐1,2,3‐triazolylmethylamine) clathrochelate ligand: the Cu2+ ion coordinates two deprotonated amino groups and two donor azaheterocyclic fragments of the ribbed substituents of the macrobicyclic ligand. Demetallation of this copper(II) complex with potassium cyanide gave target clathrochelate as a minor product. The major macrobicyclic product of this demetallation containing one inherent amino group and one benzyl‐1,2,3‐triazolylmethylamine ribbed substituent resulted from the side dealkylation reaction. The complexes obtained were characterized using elemental analysis, MALDI‐TOF mass spectrometry, IR, UV/Vis, 1H and 13C{1H} NMR spectroscopy, and by X‐ray diffraction. The geometry of their FeN6 coordination polyhedra is intermediate between a trigonal prism and a trigonal antiprism.
Synthesis and Conformational Analysis of Heterogeneous Cyclic Oligomers of 6‐Amino‐6‐deoxygalactonic Acid and Phenylalanine
Authors: Soengas Raquel G. , Fontanella Marco , Santos Jose I. , Fleet George W. J. , Jiménez‐Barbero Jesús 
Published: August 2012

AbstractA series of heterogeneous oligomers based on the sugar ϵ‐amino acid 6‐amino‐6‐deoxygalactonic acid and D‐ or L‐phenylalanine have been synthesised and cyclised. The resulting cyclic heterogeneous oligomers have been analysed by molecular dynamics and NMR spectroscopy to describe their conformational and topological features. These initial studies have provided valuable insight into the structural properties of these cyclopeptides.
Practical Pd/C‐Catalysed Suzuki–Miyaura Reactions for the Preparation of 3‐Aryl‐4‐oxypyridin‐2(1H)‐ones, 3‐Aryl‐2,4‐oxypyridines and 3‐Aryl‐2,4‐oxyquinolines as Useful Intermediates for the Synthesis of Biologically Active Compounds
Authors: Lamblin Marc , Bares Hugo , Dessolin Jean , Marty Christel , Bourgougnon Nathalie , Felpin François‐Xavier 
Published: August 2012

AbstractPractical heterogeneous Pd/C‐catalysed Suzuki–Miyaura cross‐coupling reactions of 3‐iodo‐4‐oxypyridin‐2(1H)‐ones, 3‐iodo‐2,4‐oxypyridines, and 3‐iodo‐2,4‐oxyquinolines with arylboronic acids are described as a useful and efficient alternative to homogeneous conditions. The methodology features ligand‐free and environmentally friendly conditions, and tolerates a wide range of boronic acids. The cross‐coupled products can be viewed as useful intermediates for the preparation of 3‐aryl‐4‐hydroxypyridin‐2(1H)‐ones, which can be used as new nucleobases for antiherpetic agents.