bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the Activation of Methane and Carbon Dioxide by [HTaO]+ and [TaOH]+ in the Gas Phase: A Mechanistic Study
Authors: Firouzbakht Marjan , Rijs Nicole J. , González‐Navarrete Patricio , Schlangen Maria , Kaupp Martin , Schwarz Helmut 
Published: June 2016

AbstractThe thermal reactions of [Ta,O,H]+ with methane and carbon dioxide have been investigated experimentally and theoretically by using electrospray ionization mass spectrometry (ESI MS) and density functional theory calculations. Although the activation of methane proceeds by liberation of H2, the activation of CO2 gives rise to the formation of [OTa(OH)]+ under the elimination of CO. Computational studies of the reactions of methane and carbon dioxide with the two isomers of [Ta,O,H]+, namely, [HTaO]+ and [Ta(OH)]+, have been performed to elucidate mechanistic aspects and to explain characteristic reaction patterns.
Supramolecular Self‐Assembly of Histidine‐Capped‐Dialkoxy‐Anthracene: A Visible‐Light‐Triggered Platform for Facile siRNA Delivery
Authors: Patil Sachin P. , Moosa Basem A. , Alsaiari Shahad , Alamoudi Kholod , Alshamsan Aws , AlMalik Abdulaziz , Adil Karim , Eddaoudi Mohamed , Khashab Niveen M. 
Published: June 2016

AbstractSupramolecular self‐assembly of histidine‐capped‐dialkoxy‐anthracene (HDA) results in the formation of light‐responsive nanostructures. Single‐crystal X‐ray diffraction analysis of HDA shows two types of hydrogen bonding. The first hydrogen bond is established between the imidazole moieties while the second involves the oxygen atom of one amide group and the hydrogen atom of a second amide group. When protonated in acidic aqueous media, HDA successfully complexes siRNA yielding spherical nanostructures. This biocompatible platform controllably delivers siRNA with high efficacy upon visible‐light irradiation leading up to 90 % of gene silencing in live cells.
Synthesis of 1,2,4‐Triazolo[4,3‐a]pyridines and Related Heterocycles by Sequential Condensation and Iodine‐Mediated Oxidative Cyclization
Authors: Li Ertong , Hu Zhiyuan , Song Lina , Yu Wenquan , Chang Junbiao 
Published: June 2016

AbstractA facile and efficient approach to access 1,2,4‐triazolo[4,3‐a]pyridines and related heterocycles has been accomplished through condensation of readily available aryl hydrazines with corresponding aldehydes followed by iodine‐mediated oxidative cyclization. This transition‐metal‐free synthetic process is broadly applicable to a variety of aromatic, aliphatic, and α,β‐unsaturated aldehydes, and can be conveniently conducted on the gram scale.
Reductive Coupling of Diynes at Rhodium Gives Fluorescent Rhodacyclopentadienes or Phosphorescent Rhodium 2,2’‐Biphenyl Complexes
Authors: Sieck Carolin , Tay Meng Guan , Thibault Marie‐Hélène , Edkins Robert M. , Costuas Karine , Halet Jean‐François , Batsanov Andrei S. , Haehnel Martin , Edkins Katharina , Lorbach Andreas , Steffen Andreas , Marder Todd B. 
Published: June 2016

AbstractReactions of [Rh(κ2‐O,O‐acac)(PMe3)2] (acac=acetylacetonato) and α,ω‐bis(arylbutadiynyl)alkanes afford two isomeric types of MC4 metallacycles with very different photophysical properties. As a result of a [2+2] reductive coupling at Rh, 2,5‐bis(arylethynyl)rhodacyclopentadienes (A) are formed, which display intense fluorescence (Φ=0.07–0.54, τ=0.2–2.5 ns) despite the presence of the heavy metal atom. Rhodium biphenyl complexes (B), which show exceptionally long‐lived (hundreds of μs) phosphorescence (Φ=0.01–0.33) at room temperature in solution, have been isolated as a second isomer originating from an unusual [4+2] cycloaddition reaction and a subsequent β‐H‐shift. We attribute the different photophysical properties of isomers A and B to a higher excited state density and a less stabilized T1 state in the biphenyl complexes B, allowing for more efficient intersystem crossing S1→Tn and T1→S0. Control of the isomer distribution is achieved by modification of the bis‐ (diyne) linker length, providing a fundamentally new route to access photoactive metal biphenyl compounds.
Small Cation‐Based High‐Performance Energetic Nitraminofurazanates
Authors: Tang Yongxing , He Chunlin , Mitchell Lauren A. , Parrish Damon A. , Shreeve Jean'ne M. 
Published: June 2016

AbstractLarge nitramino‐substituted furazan anions were combined with small cations (hydroxylammonium, hydrazinium, and ammonium) to form a series of energetic salts that was fully characterized. The structures of several of the compounds (1 a, 2 a, 3 a, and 4 a) were further confirmed by single‐crystal X‐ray diffraction. Based on their physiochemical properties, such as density, thermal stability, and sensitivity, together with the calculated detonation properties, it was found that they exhibit good detonation performance and have potential application as high‐energy‐density materials.
ChemInform Abstract: Germanium Dumbbells in a New Superconducting Modification of BaGe3.
Authors: Castillo Rodrigo , Baranov Alexey I. , Burkhardt Ulrich , Cardoso‐Gil Raul , Schnelle Walter , Bobnar Matej , Schwarz Ulrich 
Published: June 2016

AbstractThe metastable (at 25 °C) high‐temperature phase of BaGe3 (tetragonal CaGe3‐type structure, space group I4/mmm, Z = 8, powder XRD) is obtained by hot press sintering of arc melted precursor samples using 1% Ba excess for loss compensation (multi anvil press, 15 GPa, 1300 K).
ChemInform Abstract: Strong Infrared NLO Tellurides with Multifunction: CsXII4In5Te12 (XII: Mn, Zn, Cd).
Authors: Lin Hua , Liu Yi , Zhou Liu‐Jiang , Zhao Hua‐Jun , Chen Ling 
Published: June 2016

AbstractCsMII4In5Te12 (MII: Mn (I), Zn (II), Cd (III)) are prepared by solid state reactions of CsCl, Zn or Cd, In, and Te in the molar ratio 5:4:5:12 (evacuated silica tubes,1223 K, 4 d; cooling to 473 K at a rate of 5 K/h).
ChemInform Abstract: Synthesis, Crystal Structure, and Properties of the Alluaudite‐Type Vanadates Ag2‐xNaxMn2Fe(VO4)3.
Authors: Ben Yahia Hamdi , Shikano Masahiro , Tabuchi Mitsuharu , Belharouak Ilias 
Published: June 2016

AbstractAg2‐xNaxMn2Fe(VO4)3 (x = 0, 5/4, 2) solid solution are prepared by solid state reaction of stoichiometric amounts of Ag2O, Na2CO3, MnO, Fe2O3, and V2O5 under Ar (600 °C, 100 h).
ChemInform Abstract: Synthesis, Crystal Structure, and Physical Properties of a New Boride Ga2Ni21B20 with a Modified Zn2Ni21B20‐Type Structure.
Authors: Zheng Qiang , Gumeniuk Roman , Schnelle Walter , Prots Yurii , Burkhardt Ulrich , Leithe‐Jasper Andreas 
Published: June 2016

AbstractGa2Ni21B20 is prepared by both arc melting of the elements (10 wt% excess Ga) and by arc melting of B and Ni foil followed by reaction with Ga (Al2O3 crucible, ≈1300 °C).
ChemInform Abstract: Copper‐Catalyzed Oxysulfenylation of Enolates with Sodium Sulfinates: A Strategy to Construct Sulfenylated Cyclic Ethers.
Authors: Gao Yinglan , Gao Yang , Tang Xiaodong , Peng Jianwen , Hu Miao , Wu Wanqing , Jiang Huanfeng 
Published: June 2016

AbstractThe Cu‐catalyzed reaction of enols (I), (VII), and (IX) with sodium sulfinates (II) in the presence of DMF as reducing agent and solvent gives rise to cyclic ethers (III), (VIII), and (X).
ChemInform Abstract: Generation of Aryl Radicals Through Reduction of Hypervalent Iodine(III) Compounds with TEMPONa: Radical Alkene Oxyarylation.
Authors: Hartmann Marcel , Li Yi , Mueck‐Lichtenfeld Christian , Studer Armido 
Published: June 2016

AbstractA novel method for selective generation of aryl radicals from diaryliodonium salts and iodanylidene malonates with TEMPO—Na as a single‐electron transfer (SET) reducing reagent is described.
ChemInform Abstract: Cu‐Catalyzed C—H Trifluoromethylation of 3‐Arylprop‐1‐ynes for the Selective Construction of Allenic Csp2—CF3 and Propargyl Csp3—CF3 Bonds.
Authors: Ji Yun‐Long , Luo Jia‐Jia , Lin Jin‐Hong , Xiao Ji‐Chang , Gu Yu‐Cheng 
Published: June 2016

AbstractThe selectivity of the formation of allenic Csp2—CF3 and propargyl Csp3—CF3 bonds is controlled by modifying the reaction conditions.
ChemInform Abstract: Synthesis of 1,2,4‐Triazoles, N‐Fused 1,2,4‐Triazoles and 1,2,4‐Oxadiazoles via Molybdenum Hexacarbonyl‐Mediated Carbonylation of Aryl Iodides.
Authors: Nakka Mangarao , Tadikonda Ramu , Nakka Srinivas , Vidavalur Siddaiah 
Published: June 2016

AbstractMolybdenum hexacarbonyl is used as a convenient and reliable solid source of carbon monoxide allowing for preparation of the title compound without gaseous CO and Pd‐catalysis.
ChemInform Abstract: Design and Synthesis of Novel Chiral Dirhodium(II) Carboxylate Complexes for Asymmetric Cyclopropanation Reactions.
Authors: Adly Frady G. , Gardiner Michael G. , Ghanem Ashraf 
Published: June 2016

AbstractA novel approach to the design of dirhodium(II) tetracarboxylates derived from (S)‐amino acid ligands is reported.
ChemInform Abstract: Nickel(II) Complex Covalently Anchored on Core Shell Structured SiO2@Fe3O4 Nanoparticles: A Robust and Magnetically Retrievable Catalyst for Direct One‐Pot Reductive Amination of Ketones.
Authors: Sharma Rakesh Kumar , Dutta Sriparna , Sharma Shivani 
Published: June 2016

AbstractThe new title catalyst is prepared and used for the one‐pot reductive amination of ketones affording a diverse range of secondary amines in predominantly excellent yields.
ChemInform Abstract: Regioselective Multicomponent Synthesis of 2,4,6‐Trisubstituted Phenols from Fischer Alkynyl Carbene Complexes.
Authors: Lopez Julio , de la Cruz Fabiola N. , Flores‐Conde Maria Ines , Flores‐Alamo Marcos , Delgado Francisco , Tamariz Joaquin , Vazquez Miguel A. 
Published: June 2016

AbstractThe Fischer alkynyl carbenes react with terminal alkynes to give phenolic products in a cascade process via cycloaddition of alkynylethoxy carbene complexes with pentamethylcyclopentadiene, treatment with terminal alkynes to form functionalized cyclohexadienones regioselectively, reduction to tricyclic alcohols and retro‐Diels—Alder reaction.
ChemInform Abstract: Ultrasound‐Assisted Synthesis of Substituted Guanidines from Thioureas.
Authors: Pattarawarapan Mookda , Jaita Subin , Wangngae Sirilak , Phakhodee Wong 
Published: June 2016

AbstractThe simple and economic reaction mediated by inexpensive and easy to handle 2,4,6‐trichloro‐1,3,5‐triazine (TCT) is developed.
ChemInform Abstract: A Highly Efficient Pd(PPh3)4‐Catalyzed Suzuki Cross‐Coupling Method for the Preparation of 2‐Nitrobiphenyls from 1‐Chloro‐2‐nitrobenzenes and Phenylboronic Acids.
Authors: Elumalai Vijayaragavan , Sandtorv Alexander H. , Bjoersvik Hans‐Rene 
Published: June 2016

AbstractA general method for preparation of highly substituted and congested 2‐nitrobiaryls is developed.
ChemInform Abstract: Asymmetric Conjugate Addition of Organoboron Reagents to Common Enones Using Copper Catalysts.
Authors: Wu Chunlin , Yue Guizhou , Nielsen Christian Duc‐Trieu , Xu Kai , Hirao Hajime , Zhou Jianrong 
Published: June 2016

AbstractCopper catalysts ligated by phosphoramidites are utilized for the asymmetric addition of organoborons to a wide range of enones.
ChemInform Abstract: Formal [4 + 1] Cycloadditions of β,β‐Diaryl‐Substituted ortho‐(Alkynyl)styrenes Through Gold(I)‐Catalyzed Cycloisomerization Reactions.
Authors: Sanjuan Ana M. , Virumbrales Cintia , Garcia‐Garcia Patricia , Fernandez‐Rodriguez Manuel A. , Sanz Roberto 
Published: June 2016

AbstractDepending on the reaction temperature the title reaction affords either dihydroindeno[2,1‐a]indenes (80°C) or benzofulvenes (0°C) in high yields.
ChemInform Abstract: Chemoenzymatic Synthesis of α‐Cyano Epoxides by a Tandem‐Knoevenagel—Epoxidation Reaction.
Authors: Yang Fengjuan , Zhang Xiaowen , Li Fengxi , Wang Zhi , Wang Lei 
Published: June 2016

AbstractA green and convenient route towards α‐cyano epoxides is developed.
ChemInform Abstract: A Microwave‐Assisted Multicomponent Protocol for the Synthesis of Benzofuran‐2‐carboxamides.
Authors: Vincetti Paolo , Brianza Anna , Scalacci Nicolo , Costantino Gabriele , Castagnolo Daniele , Radi Marco 
Published: June 2016

AbstractA practical, versatile, fast, and transition metal‐free microwave‐assisted multicomponent procedure to synthesize the title compounds starting from commercially available and cheap building blocks is reported.
ChemInform Abstract: Regiodivergent Enantioselective γ‐Additions of Oxazolones to 2,3‐Butadienoates Catalyzed by Phosphines: Synthesis of α,α‐Disubstituted α‐Amino Acids and N,O‐Acetal Derivatives.
Authors: Wang Tianli , Yu Zhaoyuan , Hoon Ding Long , Phee Claire Yan , Lan Yu , Lu Yixin 
Published: June 2016

AbstractRegiodivergent enantioselective C‐2‐ and C‐4‐selective γ‐additions of oxazolones to 2,3‐butadienoates catalyzed by chiral phosphines are developed.
ChemInform Abstract: Microwave‐Assisted One‐Pot Three‐Component Synthesis of Imine 1,2,3‐Triazoles.
Authors: Souza Frederico B. , Pimenta Daniel C. , Stefani Helio A. 
Published: June 2016

AbstractImines, generated in situ from α‐thioaldehydes and propargylamine, undergo cycloaddition reactions with azides to afford novel triazole derivatives.
ChemInform Abstract: PBr3‐Mediated Unexpected Reductive Deoxygenation of α‐Aryl‐pyridinemethanols: Synthesis of Arylmethylpyridines.
Authors: Nishigaya Yosuke , Umei Kentaro , Watanabe Daisuke , Kohno Yasushi , Seto Shigeki 
Published: June 2016

AbstractIn an attempt to substitute the hydroxy group in the title compounds by a bromine, a direct reductive deoxygenation takes place to produce the desired final target compounds.
ChemInform Abstract: Copper‐Catalyzed Synthesis of Quinoline Derivatives via Tandem Knoevenagel Condensation, Amination and Cyclization.
Authors: Dhiman Shiv , Saini Hitesh Kumar , Nandwana Nitesh Kumar , Kumar Dalip , Kumar Anil 
Published: June 2016

AbstractKnoevenagel condensation of 2‐bromobenzaldehydes with active methylene nitriles followed by copper‐catalyzed reductive amination and intramolecular cyclization affords 2‐aminoquinolines and 2‐arylquinoline‐3‐carbonitriles regioselectively.
ChemInform Abstract: One‐Pot Synthesis of Highly Functionalized Pyrimido[1,2‐b]indazoles via 6‐endo‐Dig Cyclization.
Authors: Palaniraja Jeyakannu , Roopan Selvaraj Mohana , Rayalu G. Mokesh 
Published: June 2016

AbstractA three‐component coupling reaction of 1H‐indazol‐3‐amine, aromatic aldehydes, and alkynes affords pyrimidoindazoles through 6‐endo‐dig cyclization.
ChemInform Abstract: Regioselective Synthesis of Quinazolinone‐/Phenanthridine‐Fused Heteropolycycles by Pd‐Catalyzed Direct Intramolecular Aerobic Oxidative C—H Amination from Aromatic Strained Amides.
Authors: Banerji Biswadip , Bera Suvankar , Chatterjee Satadru , Killi Sunil Kumar , Adhikary Saswati 
Published: June 2016

AbstractUnder the reaction conditions only linear fused isomers are obtained.
ChemInform Abstract: Synthesis of a Series of γ‐Keto Allyl Phosphonates.
Authors: Elleuch Haitham , Ayadi Marwa , Bouajila Jalloul , Rezgui Farhat 
Published: June 2016

AbstractCyclic Morita—Baylis—Hillman acetates are rapidly transformed into the corresponding γ‐keto allyl phosphonates by allylic nucleophilic substitution.
ChemInform Abstract: Base‐Free Direct Synthesis of Alkynylphosphonates from Alkynes and H‐Phosphonates Catalyzed by Cu2O.
Authors: Moglie Yanina , Mascaro Evangelina , Gutierrez Victoria , Alonso Francisco , Radivoy Gabriel 
Published: June 2016

AbstractThe simple and mild protocol tolerates a wide variety of functional groups on the parent alkynes and can be run on gram scale.
ChemInform Abstract: New Cytotoxic Neo‐Clerodane Diterpenoids from Scutellaria strigillosa.
Authors: Dai Sheng‐Jun , Zhang Lei , Xiao Kai , Han Qing‐Tong 
Published: June 2016

AbstractThree new neo‐clerodane diterpenoids, named scutestrigillosins A (I), B (II), and C (III), are isolated from the whole plant of Scutellaria strigillosa.
ChemInform Abstract: Concise Total Synthesis of (+)‐Asperazine, (+)‐Pestalazine A, and (+)‐iso‐Pestalazine A. Structure Revision of (+)‐Pestalazine A.
Authors: Loach Richard P. , Fenton Owen S. , Movassaghi Mohammad 
Published: June 2016

AbstractThe enantioselective total syntheses of (+)‐asperazine (Ia), (+)‐iso‐pestalazine A (Ib), and (+)‐pestalazine A (Ic) are completed in 11 steps from commercial N‐Boc‐L‐tryptophan methyl ester, in overall yields 6.8%, 8.0% and 4.8%, resp.
ChemInform Abstract: Total Synthesis of Sacrolide A by Following a Nozaki—Hiyama—Kishi Macrocyclization Strategy.
Authors: Jena Bighnanshu K. , Reddy Aedula Vishnu V. , Mohapatra Debendra K. 
Published: June 2016

AbstractThe title compound is obtained through a Jacobsen hydrolytic kinetic resolution, Sharpless asymmetric epoxidation, Yamaguchi esterification, and intramolecular Nozaki—Hiyama—Kishi (NHK) macrocyclization as key steps.
How do you write and present research well? 16—Target an audience and promote
Authors: Patience Gregory S. , Boffito Daria C. , Patience Paul A. 
Published: June 2016

Abstract
Web of ScienceTM Core Collection[1] (WoS), Google Scholar[2] (GS) and Scopus are citation databases that index all sorts of publications. At the end of 2014, WoS indexed 39 million documents including scientific articles (23 million), papers in proceedings (6 million), meeting abstracts (4 million), book reviews (2 million), and editorials, letters, reviews, and news (4 million). What percentage of the scientific articles (in WoS) have been cited at least once?[3]

more than 90 %
between 80 % and 90 %
between 50 % and 80 %
less than 50 %
Specialist pollinators deplete pollen in the spring ephemeral wildflower Claytonia virginica
Authors: Parker Alison J. , Williams Neal M. , Thomson James D. 
Published: June 2016

AbstractPollinators that collect pollen – and specifically, pollen‐specialist bees – are often considered to be the best pollinators of a (host) plant. Although pollen collectors and pollen specialists often benefit host plants, especially in the pollen that they deliver (their pollination “effectiveness”), they can also exact substantial costs because they are motivated to collect as much pollen as possible, reducing the proportion of pollen removed that is subsequently delivered to stigmas (their pollination “efficiency”). From the plant perspective, pollen grains that do not pollinate conspecific stigmas are “wasted”, and potentially costly. We measured costs and benefits of nectar‐collecting, pollen‐collecting, and pollen‐specialist pollinator visitation to the spring ephemeral Claytonia virginica. Visits by the pollen‐specialist bee Andrena erigeniae depleted pollen quickly and thoroughly. Although all pollinators delivered roughly the same number of grains, the pollen specialist contributed most to C. virginica pollen delivery because of high visitation rates. However, the pollen specialist also removed a large number of grains; this removal may be especially costly because it resulted in the depletion of pollen grains in C. virginica populations. While C. virginica appears to rely on pollen transfer by the pollen specialist in these populations, nectar‐collecting visitors could provide the same benefit at a lower cost if their visitation rates increased. Pollen depletion affects a pollinator's value to plants, but is frequently overlooked. If they lower the effectiveness of future floral visitors, visits by A. erigeniae females to C. virginica may be more detrimental than beneficial compared to other pollinators and may, in some circumstances, reduce plant fitness rather than increase it. Therefore, A. erigeniae and C. virginica may vary in their degree of mutualism depending on the ecological context.
Facing environmental predictability with different sources of epigenetic variation
Authors: Leung Christelle , Breton Sophie , Angers Bernard 
Published: June 2016

AbstractDifferent sources of epigenetic changes can increase the range of phenotypic options. Environmentally induced epigenetic changes and stochastic epimutations are, respectively, associated with phenotypic plasticity and diversifying bet‐hedging. Their relative contribution is thus expected to reflect the capacity of a genotype to face distinct changes since these strategies are differentially selected according to environmental uncertainty. To test this hypothesis, we assessed the sources of epigenetic changes on clonal fish from predictable (lakes) or unpredictable (intermittent streams) environments.DNAmethylation of clones from natural conditions revealed contrasting contribution of environmentally induced versus stochastic changes according to their origins. These differences were validated in common garden experiments. Consistent with theoretical models, distinct sources of epigenetic variation prevail according to the environmental uncertainty. However, both sources act conjointly, suggesting that plasticity and random processes are complementary strategies. This represents a rigorous approach for further exploring the capacity of organisms to respond to environmental conditions.
Attentional bias modification for acute experimental pain: A randomized controlled trial of retraining early versus later attention on pain severity, threshold and tolerance
Authors: Bowler J.O. , Bartholomew K.J. , Kellar I. , Mackintosh B. , Hoppitt L. , Bayliss A.P. 
Published: June 2016

AbstractBackgroundNoxious attentional bias is thought to confer vulnerability to pain, suggesting that modifying the bias could reduce pain outcomes. Herein is presented a randomized controlled trial to test the effects of retraining the dot probe attentional bias at short versus long stimulus durations towards neutral stimuli, and away from threat stimuli, on acute pain experience, in comparison with a placebo control group.MethodsEighty‐one pain‐free volunteers, blinded to condition, were randomized to complete either one of two neutral bias modification programs in which words were presented for 500 ms (ABM‐500;n = 28) or 1250 ms (ABM‐1250;n = 26), or to a sham training program that included both stimulus durations (ABM‐Placebo;n = 27). Testing took place in a university laboratory. At post‐training, participants completed the pain‐inducing ‘cold pressor task’, and measures of pain severity, threshold and tolerance were taken. Attentional bias was also measured at pre‐ and post‐training.ResultsFindings indicated thatABM‐500 reliably increased pain threshold and tolerance, in comparison with the control group. In contrast,ABM‐1250 did not affect any of the pain outcomes. ExpectedABMeffects on attentional bias were not evident at the group level, but neverthelessABM‐500 bias reduction was significantly associated with increased pain tolerance.ConclusionsThese findings suggest that retraining attention at short stimulus exposure durations is relatively more efficacious in promoting transfer of attentional retraining effects to real‐world acute pain stressors, in comparison with both the longer stimulus duration andABM‐Placebo.SignificanceTesting of the impact of modifying maintained attentional bias on vulnerability to an acute pain stressor.Findings suggested that retraining rapid attentional bias using short exposure durations conferred greater analgesic benefit, in comparison with both the slower bias and sham‐training.