bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Synthesis of Tetracyclic 8‐Aza‐naphthalen‐9‐ones and Oxa‐naphthalen‐9‐one.
Authors: Soman Shubhangi S. , Thaker Tirth H. 
Published: January 2011

AbstractCondensation of 2‐bromo‐1‐methylbenzochromenone (II) with cyclic secondary amines or primary aromatic amines affords dioxapentalenonaphthalenone (III) and azanaphthalenones (V), respectively.
ChemInform Abstract: Synthesis of 4‐(1‐Adamantyl)‐3‐polyfluoromethyl‐1H‐pyrazoles.
Authors: Butov G. M. , Mokhov V. M. , Parshin G. Yu. , Shevelev S. A. , Dalinger I. L. , Vatsadze I. A. , Shkineva T. K. 
Published: January 2011

AbstractThe title compounds (II) are colorless, high‐melting, and crystalline substances.
ChemInform Abstract: New Chiral 3‐Aryl‐7‐arylmethylidene‐3,3a,4,5,6,7‐hexahydroindazoles: Synthesis, Structure, and Twisting Power in Nematic Liquid Crystals.
Authors: Abakumov V. V. , Pivnenko N. S. , Kutulya L. A. , Konovalova I. S. , Roshal' A. D. , Novikova N. B. , Shishkin O. V. 
Published: January 2011

AbstractStarting from (3R)‐3‐methylcyclohexanone, compounds (III), (V) and a range of alkyl‐substituted analogues are prepared stereoselectively in low to medium yields for application as chiral additives in liquid crystalline materials.
ChemInform Abstract: Development of the Next Generation of HIV‐1 Integrase Inhibitors: Pyrazolone as a Novel Inhibitor Scaffold.
Authors: Hadi Victor , Koh Yung‐Hyo , Sanchez Tino Wilson , Barrios Danielle , Neamati Nouri , Jung Kyung Woon 
Published: January 2011

AbstractVarious derivatives based on the pyrazolone scaffold are synthesized and SAR studies are performed.
ChemInform Abstract: Metal‐Free Deprotonative Functionalization of Heteroaromatics Using Organic Superbase Catalyst.
Authors: Hirono Yutaro , Kobayashi Koji , Yonemoto Misato , Kondo Yoshinori 
Published: January 2011

AbstractPhosphazene base P4‐tBu is used as a superbase catalyst in the deuteration reaction of heterocycles (I) and (V) or their reactions with carbonyl compounds (II).
ChemInform Abstract: One‐Pot Three‐Step Synthesis of 1,2,3‐Triazoles by Copper‐Catalyzed Cycloaddition of Azides with Alkynes Formed by a Sonogashira Cross‐Coupling and Desilylation.
Authors: Friscourt Frederic , Boons Geert‐Jan 
Published: January 2011

AbstractThe target triazoles can be prepared directly from aryl iodides, trimethylsilylacetylene and azides in the microwave‐assisted procedure using both CuF2 or Bu4NF/CuI for the desilylation step.
ChemInform Abstract: Synthesis of Isochromans by Hydriodic Acid or Iodine Mediated Cyclization Reactions of 1‐(2‐Vinylphenyl)propan‐2‐ols.
Authors: Kobayashi Kazuhiro , Shikata Kazuaki , Maegawa Hiroki , Fukamachi Shuhei , Tanmatsu Miyuki , Konishi Hisatoshi 
Published: January 2011

AbstractSimple routes to the title compounds (IV), (V), and (VII) are presented by using readily available starting materials and hydriodic acid or iodine mediated cyclizations.
ChemInform Abstract: A New Domino Knoevenagel‐hetero‐Diels—Alder Reaction: An Efficient Catalyst‐Free Synthesis of Novel Thiochromone‐Annulated Thiopyranocoumarin Derivatives in Aqueous Medium.
Authors: Moghaddam Firouz Matloubi , Kiamehr Mostafa , Khodabakhshi Mohammad Reza , Mirjafary Zohreh , Fathi Shaghayegh , Saeidian Hamdollah 
Published: January 2011

AbstractThe reaction generally proceeds with high diastereoselectivity.
ChemInform Abstract: Selective C‐4 Alkylation of Pyridine by Nickel/Lewis Acid Catalysis.
Authors: Nakao Yoshiaki , Yamada Yuuya , Kashihara Natsuko , Hiyama Tamejiro 
Published: January 2011

AbstractDirect C‐4‐selective addition of pyridine derivatives with various alkenes is achieved for the first time by a nickel/ Lewis acid cooperative catalysis with an N‐heterocyclic carbene ligand.
ChemInform Abstract: Microwave‐Assisted Synthesis of Polysubstituted 4‐Quinolones from Deprotonated α‐Aminonitriles.
Authors: Romek Alexandra , Opatz Till 
Published: January 2011

AbstractThe α‐alkylations of deprotonated Strecker products such as (I) or (V) give a series of intermediates such as (III), (VI), or (X), which undergo microwave‐assisted HCN and EtOH eliminations leading to the title quinolones (IV), (VII)/(VIII), or (XI).
ChemInform Abstract: Synthesis of Methyl 7‐Aryl(hetaryl, cyclohexenyl)‐10,10‐dimethyl‐8‐oxo‐7,8,9,10,11,12‐hexahydrobenzo[b] [1,7]phenanthroline‐9‐carboxylates
Authors: Kozlov N. G. , Tereshko A. B. 
Published: January 2011

Abstractvia three‐component condensation of aminoquinoline (I) with cyclohexanedione (III) and various aldehydes
ChemInform Abstract: A Regioselective One‐Pot, Three Component Synthesis of 6‐Aryl‐4‐cyano‐3(2H)‐pyridazinones in Water.
Authors: Rimaz Mehdi , Khalafy Jabbar , Moghadam Peyman Najafi 
Published: January 2011

AbstractOptimized conditions A) allow the preparation of the target compounds (III) and (V) in a regioselective manner and good to excellent yields.
ChemInform Abstract: Development of Novel Inhibitors Targeting HIF‐1α Towards Anticancer Drug Discovery.
Authors: Yewalkar Nilambari , Deore Vijaykumar , Padgaonkar Amol , Manohar Sonal , Sahu Bichismita , Kumar Pramod , Jalota‐Badhwar Archana , Joshi Kalpana S. , Sharma Somesh , Kumar Sanjay 
Published: January 2011

AbstractPyridylpyrimidine based potent and selective inhibitors of HIF‐1α are designed and synthesized.
ChemInform Abstract: Ozonolyses of Isophorone and of 3‐Methyl‐2‐cyclohexen‐1‐one and Subsequent Reactions of the Respective Ozonides to Afford Di‐, Tri‐ and Tetraozonides.
Authors: Jung In Chan , Sheikh Sad Alam , Jon Byong‐Mun , Li Wei , Goo Bon‐Suk , Jeong In‐Soo 
Published: January 2011

AbstractCoozonolyses of the stable ozonides (III) with carbonyl compounds leads to stable polyozonides, e.g. (VI), (VIII), and (X).
ChemInform Abstract: Lanthanide Amides [(Me3Si)2N]3Ln(μ‐Cl)Li(THF)3 Catalyzed Hydrophosphonylation of Aryl Aldehydes.
Authors: Wu Qingmao , Zhou Jun , Yao Zhigang , Xu Fan , Shen Qi 
Published: January 2011

AbstractThe lanthanum complex is found to be a highly efficient catalyst for the title reaction.
ChemInform Abstract: Synthesis and Reactivity of 3‐Alkynyldihydroselenophene Derivatives.
Authors: Rosario Alisson R. , Schumacher Ricardo F. , Gay Bibiana M. , Menezes Paulo H. , Zeni Gilson 
Published: January 2011

AbstractA variety of 3‐iododihydroselenophene derivatives readily undergoes Sonogashira cross coupling with diverse terminal alkynes to give alkynyldihydroselenophene derivatives in good yields.
ChemInform Abstract: Cyathane Diterpenoids and Nitrogenous Terphenyl Derivative from the Fruiting Bodies of Basidiomycete Phellodon niger.
Authors: Fang Sheng‐Tao , Zhang Ling , Li Zheng‐Hui , Li Bo , Liu Ji‐Kai 
Published: January 2011

AbstractThe diterpenoids nigernin A (I) and B (II) and the nitrogenous terphenyl derivative phellodonin (III) are isolated from the title fungus for the first time.
ChemInform Abstract: Four New Sesquiterpenoids from the Roots of Incarvillea arguta and Their Inhibitory Activities Against Lipopolysaccharide‐Induced Nitric Oxide Production.
Authors: Fu Jian‐Jun , Qin Jiang‐Jiang , Zeng Qi , Huang Ying , Jin Hui Zi , Zhang Wei‐Dong 
Published: January 2011

AbstractArgutosines A—D (I)—(IV), resp., are isolated as new sesquiterpenoids along with two known structurally related compounds from the roots of Himalayan Gloxinia which is widely used as folk herbal medicine in southwest China.
ChemInform Abstract: Study on Chemical Constituents and Cytotoxic Activities of Salacia chinensis Growing in Vietnam.
Authors: Minh Tran Thi , Anh Nguyen Thi Hoang , Thang Vu Dao , Sung Tran Van 
Published: January 2011

AbstractExtraction, isolation, and structure elucidation of two new triterpenoids are reported.
ChemInform Abstract: Scutebarbatines W—Z, New neo‐Clerodane Diterpenoids from Scutellaria barbata and Structure Revision of a Series of 13‐Spiro neo‐Clerodanes.
Authors: Wang Fei , Ren Fu‐Cai , Li Ya‐Ju , Liu Ji‐Kai 
Published: January 2011

AbstractThe structure elucidation of the four new neo‐clerodane diterpenoids (I) and (II), isolated from a traditional Chinese medicinal plant, is described.
ChemInform Abstract: Enantioselective Decarboxylation of 2‐Methyl‐2‐aminomalonate Catalyzed by (S)‐2‐Hydroxy‐2′‐ (3‐phenyluryl‐benzyl)‐1,1′‐binaphthyl‐3‐carboxaldehyde.
Authors: Park Hyunjung , Nandhakumar Raju , Lee Sunmin , Ahn Yoonsu , Kim Kwan Mook 
Published: January 2011

AbstractThe chiral binaphthyl based carboxaldehyde HPBC promotes the stereoselective decarboxylation of aminomalonic acid derivative (I).
ChemInform Abstract: Identification of a Sulfonoquinovosyldiacylglyceride (I) from Azadirachta indica and Studies on Its Cytotoxic Activity and DNA Binding Properties.
Authors: Chatterjee Ratna , Singh Omkar , Pachuau Lalawmpuii , Malik Shiba Prasad , Paul Mausumi , Bhadra Kakali , Paul Santanu , Kumar Gopinatha Suresh , Mondal Nirup Bikash , Banerjee Sukdeb 
Published: January 2011

AbstractThe sulfonoglycolipid (I) exhibits significant DNA binding properties and antileukemic activity.
ChemInform Abstract: Butenolide and Furandione from an Endophytic Aspergillus terreus.
Authors: Nuclear Paulwatt , Sommit Damrong , Boonyuen Nattawut , Pudhom Khanitha 
Published: January 2011

AbstractIsolation and structure elucidation of the new butenolide aspernolide D (I) and the new furandione asperterone (II) are described.
ChemInform Abstract: Behavior of Ba(Co, Fe, Nb)O3‐δ Perovskite in CO2‐Containing Atmospheres: Degradation Mechanism and Materials Design.
Authors: Yi Jianxin , Schroeder Michael , Weirich Thomas , Mayer Joachim 
Published: January 2011

AbstractThe degradation behavior and mechanism of perovskite‐type BaCo0.4Fe0.4Nb0.2O3‐δ oxygen separation membranes are studied in CO2‐containing atmospheres at 800—1000 °C.
Davydov Splitting of Excitons in Cyclic Bacteriochlorophyll a Nanoaggregates of Bacterial Light‐Harvesting Complexes between 4.5 and 263 K
Authors: Pajusalu Mihkel , Rätsep Margus , Trinkunas Gediminas , Freiberg Arvi 
Published: January 2011

AbstractThe nature of electronic excitations created by photon absorption in the cyclic B850 aggregates of 18 bacteriochlorophyll molecules of LH2 antenna complexes of photosynthetic bacteria is studied over a broad temperature range using absorption, fluorescence, and fluorescence anisotropy spectra. The latter technique has been proved to be suitable for revealing the hidden structure of excitons in inhomogeneously broadened spectra of cyclic aggregates. A theoretical model that accounts for differences of absorbing excitons in undeformed and emitting exciton polarons in deformed antenna lattices is also developed. Only a slight decrease of the exciton bandwidth and exciton coupling energy with temperature is observed. Survival of excitons in the whole temperature span from cryogenic to nearly ambient temperatures strongly suggests that collective, coherent electronic excitations might play a role in the functional light‐harvesting process taking place at physiological temperatures.
Tellurium microtubes synthesized by thermal evaporation method
Authors: Siciliano T. , Filippo E. , Genga A. , Micocci G. , Siciliano M. , Tepore A. 
Published: January 2011

AbstractTe microtubes with hexagonal cross sections were deposited on quartz substrates by thermal evaporation method of Te metal in an inert atmosphere without the presence of any catalyst. Tellurium was evaporated by heating at 600 °C and the Te gas was condensed on quartz substrates at 280–300 °C under a flow of argon maintained at 20 sccm for different evaporation times. Scanning electron microscopy observation demonstrated that the initial products mainly consisted of sphere‐like microparticles. With increasing the evaporation time these microparticles gradually evolved into complete microtubes and then into microrods. The diameters of the microtubes range from 30 to 70 µm and their lengths from 0.5 to 6 mm. Structural and chemical characterization using X‐ray diffraction and energy dispersive spectrometer, show that the Te microtubes consist of only the Te element and have a single phase hexagonal structure. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Leveraging Gigawatt Potentials by Smart Heat‐Pump Technologies Using Ionic Liquids
Authors: Wasserscheid Peter , Seiler Matthias 
Published: January 2011

AbstractOne of the greatest challenges to science in the 21 st century is the development of efficient energy production, storage, and transformation systems with minimal ecological footprints. Due to the lack of efficient heat‐transformation technologies, industries around the world currently waste energy in the gigawatt range at low temperatures (40–80 °C). These energy potentials can be unlocked or used more efficiently through a new generation of smart heat pumps operating with novel ionic liquid (IL)‐based working pairs. The new technology is expected to allow revolutionary technical progress in heat‐transformation devices, for example, significantly higher potential efficiencies, lower specific investments, and broader possibilities to incorporate waste energy from renewable sources. Furthermore, due to drastically reduced corrosion rates and excellent thermal stabilities of the new, IL‐based working pairs, the high driving temperatures necessary for multi‐effect cycles such as double‐ or triple‐effect absorption chillers, can also be realized. The details of this novel and innovative heat‐transformation technology are described.
Chemical, Electrochemical, and Photochemical Catalytic Oxidation of Water to Dioxygen with Mononuclear Ruthenium Complexes
Authors: Roeser Stephan , Farràs Pau , Bozoglian Fernando , Martínez‐Belmonte Marta , Benet‐Buchholz Jordi , Llobet Antoni 
Published: January 2011

AbstractFour new RuIICl and RuIIH2O complexes containing the meridional 2,2’:6’,2”‐terpyridine (trpy) ligand and the chelating 2‐(5‐phenyl‐1H‐pyrazol‐3‐yl)pyridine (H3p) ligand of general formula in‐ and out‐[RuII(trpy)(H3p)(X)]n+ (X=Cl, n=1; X=H2O, n=2) have been prepared, isolated and thoroughly characterized both in solution and in the solid state. In solution, all the complexes are characterized spectroscopically by UV/Vis and NMR, and their redox properties investigated by means of cyclic voltammetry, square wave voltammetry, and coulometry. In the solid state, monocrystal X‐ray diffraction analysis was carried out for the in and out RuCl complexes. The capacity of the Ru‐aqua complexes to act as water oxidation catalysts (WOCs) was also investigated chemically, electrochemically, and photochemically. The performance of these complexes has also been compared to two previously described complexes of general formula in‐ and out‐[RuII(trpy)(Hbpp)(H2O)]2+ (Hbpp is 2,2′‐(1H‐pyrazole‐3,5‐diyl)dipyridine)), the capacity of which as WOCs had not been previously described.
Synthesis of 5‐(Hydroxymethyl)furfural in Ionic Liquids: Paving the Way to Renewable Chemicals
Authors: Ståhlberg Tim , Fu Wenjing , Woodley John M , Riisager Anders 
Published: January 2011

AbstractThe synthesis of 5‐(hydroxymethyl)furfural (HMF) in ionic liquids is a field that has grown rapidly in recent years. Unique dissolving properties for crude biomass in combination with a high selectivity for HMF formation from hexose sugars make ionic liquids attractive reaction media for the production of chemicals from renewable resources. A wide range of new catalytic systems that are unique for the transformation of glucose and fructose to HMF in ionic liquids has been found. However, literature examples of scale‐up and process development are still scarce, and future research needs to complement the new chemistry with studies on larger scales in order to find economically and environmentally feasible processes for HMF production in ionic liquids. This Minireview surveys important progress made in catalyst development for the synthesis of HMF in ionic liquids, and proposes future research directions in process technology.
Vegetation as affected by groundwater depth and microtopography in a shallow aquifer area of the Great Basin
Authors: Mata‐González R. , McLendon T. , Martin D. W. , Trlica M. J. , Pearce R. A. 
Published: January 2011

AbstractThis study was designed to better define the nature of the relationship among vegetation, groundwater level and microtopography in an arid area where depth to groundwater (DTW) was 0–4 m. Plant cover, DTW and relative elevations were jointly measured along 67 vegetation transects throughout the Owens Valley, CA, USA. These transects were dominated by major species of the area: Artemisia tridentata, Atriplex torreyi, Ericameria nauseosa, Distichlis spicata, Juncus arcticus, Leymus triticoides, Sarcobatus vermiculatus and Sporobolus airoides. Plant species occurrence was associated with different DTW. J. arcticus and D. spicata occurred more frequently in areas with the shallowest groundwater (<1·5 m). A. torreyi, L. triticoides and E. nauseosa dominated areas with intermediate DTW (1·5–2·0 m); whereas S. airoides, S. vermiculatus and A. tridentata dominated areas with deeper water tables (>2·0 m). Species were also linked to different microtopographic positions: L. triticoides and J. arcticus were mainly restricted to depressions whereas A. torreyi and A. tridentata were widely distributed in higher positions on the microtopographical gradient. Only 6% of the variation in vegetation cover was accounted for by DTW throughout the study area (N = 820). Cover of individual species was usually unaffected by DTW variation. Results suggest that species distribution is linked to groundwater conditions, but cover of vegetation is only partially affected by DTW variation. This is possible because water tables in our study area are within the rooting depth of most species and plants appear to be well adapted to shallow DTW variations. Copyright © 2011 John Wiley & Sons, Ltd.
Formal Synthesis of Galantinic Acid by Oxo‐Diels–Alder Methodology
Authors: Chaładaj Wojciech , Jurczak Janusz 
Published: January 2011

AbstractThis communication presents a simple and efficient enantioselective route to galantinic acid. The strategy is based on a highly enantioselective hetero‐Diels–Alder (HDA) reaction of 3‐(4‐methoxybenzyloxy)propanal with Danishefsky's diene followed by selective introduction of further stereogenic centers thanks to the rigidity of the dihydropyran ring. The key HDA reaction is catalyzed by a new salen CrIII complex bearing a 1,1‐diphenylethyl substituent at the 3‐position of the salicyliden moiety.
Dynamic Kinetic Resolution of β‐Amino Esters by a Heterogeneous System of a Palladium Nanocatalyst and Candida antarctica Lipase A
Authors: Engström Karin , Shakeri Mozaffar , Bäckvall Jan‐E. 
Published: January 2011

AbstractA dynamic kinetic resolution (DKR) of β‐amino esters have been developed by the use of a heterogeneous racemization catalyst and an immobilized enzyme that accepts aromatic, heteroaromatic and aliphatic substrates. The reaction conditions were optimized to yield an efficient catalytic system without by‐product formation. The products are obtained in 96–99 % ee and high yields.
Perceptions of source efficacy and persuasion: Multiple mechanisms for source effects on attitudes
Authors: Clark Jason K. , Evans Abigail T. , Wegener Duane T. 
Published: January 2011

AbstractWhen communicators are perceived as likely to bring proposed outcomes to fruition, they have source efficacy. Although perceptions of source efficacy are common in persuasion settings, this construct has received little direct research attention. The present research explored how source efficacy may impact persuasion in different ways at different levels of motivation to process messages. Across three experiments, participants encountered message arguments of varying quality from a source manipulated to be relatively efficacious or inefficacious. When motivation to process the message was low, source efficacy served as a peripheral cue (Experiment 1). When motivation was high, efficacy information learned before the message biased processing of ambiguous messages (Experiment 2), but source efficacy learned after the message affected the amount of confidence people had in their message‐related thoughts (Experiment 3). These effects of source efficacy were distinct from effects of perceived source expertise/credibility. Copyright © 2011 John Wiley & Sons, Ltd.
Exchanging social positions: Enhancing perspective taking within a cooperative problem solving task
Authors: Gillespie Alex , Richardson Beth 
Published: January 2011

AbstractWhen people occupy different social positions within a cooperative task they experience discrepant role and situation demands and thus have divergent perspectives. The reported research predicts that exchanging social positions within a cooperative task can overcome divergences of perspective. This prediction was tested in two experiments using the Communication Conflict Situation. The first experiment (n = 88) found that position exchange increased the ability of dyads to solve a communication conflict arising through discrepant perspectives. The second experiment (n = 120) found that the effect of position exchange exceeds that of purely cognitive perspective taking, thus suggesting that it cannot be reduced to a purely cognitive process. Exchanging social positions is a newly identified and powerful social mechanism through which perspective taking, within a cooperative task, can be enhanced. Copyright © 2011 John Wiley & Sons, Ltd.
Comparison of model structural uncertainty using a multi‐objective optimisation method
Authors: Lee Giha , Tachikawa Yausto , Takara Kaoru 
Published: January 2011

AbstractThis study aims to propose a method for effectively recognising and evaluating model structural uncertainty. It began with a comparative assessment of various model structures that have differing features regarding the rainfall‐runoff mechanism and DEM spatial resolution. The assessment applied a multi‐objective optimisation method (MOSCEM‐UA) with two objective functions (simple least‐squares and the heteroscedastic maximum likelihood estimator), and focused on five historical flood events. The study was based on the assumptions that a structurally sound model assures improved prediction results (either minimized or maximized model performance measure), allows constant model performance with regard to objective functions (a small Pareto solution set), and yields good applicability of a calibrated parameter set to various events (good parameter stability). The results indicated that KWMSS, a distributed model, was superior to SFM, a simple lumped model, when estimating a Pareto solution set and assessing parameter stability for the applied events. In addition, three different spatial resolutions (250 m, 500 m, and 1 km) were compared to assess the structural uncertainty due to changes in the topographical representation in distributed rainfall‐runoff modelling. The results indicated that the 250 and 500 m models were Pareto‐equivalent, containing similar Pareto fronts, and both produced Pareto results superior to the 1 km model. Both models also yielded parameter stability values that were much more superior to the model based on a 1 km DEM. As the topographic representation became more detailed, the model showed a tendency to have less structural uncertainty in terms of guarantying better performance, better parameter stability, and a smaller Pareto solution set. On the other hand, the output of a spatially detailed model was likely to be insensitive to the variation of model parameters (i.e. equifinality). Copyright © 2011 John Wiley & Sons, Ltd.