bluuebunny/crossref_metadata_2025_split huggingface dataset:
Large Ferrierite Crystals as Models for Catalyst Deactivation during Skeletal Isomerisation of Oleic Acid: Evidence for Pore Mouth Catalysis
Authors: Wiedemann Sophie C. C. , Ristanović Zoran , Whiting Gareth T. , Reddy Marthala V. R. , Kärger Jörg , Weitkamp Jens , Wels Bas , Bruijnincx Pieter C. A. , Weckhuysen Bert M. 
Published: November 2015

AbstractLarge zeolite crystals of ferrierite have been used to study the deactivation, at the single particle level, of the alkyl isomerisation catalysis of oleic acid and elaidic acid by a combination of visible micro‐spectroscopy and fluorescence microscopy (both polarised wide‐field and confocal modes). The large crystals did show the desired activity, albeit only traces of the isomerisation product were obtained and low conversions were achieved compared to commercial ferrierite powders. This limited activity is in line with their lower external non‐basal surface area, supporting the hypothesis of pore mouth catalysis. Further evidence for the latter comes from visible micro‐spectroscopy, which shows that the accumulation of aromatic species is limited to the crystal edges, while fluorescence microscopy strongly suggests the presence of polyenylic carbocations. Light polarisation associated with the spatial resolution of fluorescence microscopy reveals that these carbonaceous deposits are aligned only in the larger 10‐MR channels of ferrierite at all crystal edges. The reaction is hence further limited to these specific pore mouths.
Native Chemical Ligation to Minimize Aspartimide Formation during Chemical Synthesis of Small LDLa Protein
Authors: Tailhades Julien , Sethi Ashish , Petrie Emma J. , Gooley Paul R. , Bathgate Ross A. , Wade John D. , Hossain Mohammed A. 
Published: November 2015

AbstractThe inhibition of the G protein‐coupled receptor, relaxin family peptide receptor 1 (RXFP1), by a small LDLa protein may be a potential approach for prostate cancer treatment. However, it is a significant challenge to chemically produce the 41‐residue and three‐disulfide cross‐bridged LDLa module which is highly prone to aspartimide formation due to the presence of several aspartic acid residues. Known palliative measures, including addition of HOBt to piperidine for Nα‐deprotection, failed to completely overcome this side reaction. For this reason, an elegant native chemical ligation approach was employed in which two segments were assembled for generating the linear LDLa protein. Acquisition of correct folding was achieved by using either a regioselective disulfide bond formation or global oxidation strategies. The final synthetic LDLa protein obtained was characterized by NMR spectroscopic structural analysis after chelation with a Ca2+ ion and confirmed to be equivalent to the same protein obtained by recombinant DNA production.
ChemInform Abstract: The Influence of Mn Doping on the Properties of Ge4Sb2Te7.
Authors: Welzmiller Simon , Heinke Frank , Huth Paula , Bothmann Georg , Scheidt Ernst‐Wilhelm , Wagner Gerald , Scherer Wolfgang , Poeppl Andreas , Oeckler Oliver 
Published: November 2015

AbstractThe Mn‐doped compounds Ge3MnSb2Te7 and Ge3.5Mn0.5Sb2Te7 are prepared from stoichiometric mixtures of the elements (silica ampules, 950 °C for 24 h, quenching and subsequent annealing at 550 °C for 96 h).
ChemInform Abstract: Large Magnetization and Frustration Switching of Magnetoresistance in the Double‐Perovskite Ferrimagnet Mn2FeReO6.
Authors: Arevalo‐Lopez Angel M. , McNally Graham M. , Attfield J. Paul 
Published: November 2015

AbstractMn2FeReO6 is prepared by hot pressing of a stoichiometric mixture of Mn3O4, Fe3O4, and ReO2 (Pt capsule in multianvil press, 11 GPa, 1400 °C, 20 min).
ChemInform Abstract: Large Magnetocaloric Effect Near Room Temperature in Mn—Fe—P—Ge Nanostructured Powders.
Authors: Chen X. , Ramanujan R. V. 
Published: November 2015

AbstractPolycrystalline Mn1.1Fe0.9P1‐xGex (x = 0.13, 0.19, 0.21, 0.26, 0.32) alloys are prepared by arc melting followed by ball milling in Ar atmosphere and subsequent annealing in vacuum at 950 °C for 12 h.
ChemInform Abstract: Facile Synthesis and Electroactivity of 3‐D Hierarchically Superstructured Cobalt Orthophosphate for Lithium‐Ion Batteries.
Authors: Choi Changhoon , Seo Seung‐Deok , Shim Hyun‐Woo , Dar Mushtaq Ahmad , Cho In Sun , Kim Dong‐Wan 
Published: November 2015

AbstractA three‐dimensional hierarchical cobalt orthophosphate, Co3(PO4)2 is synthesized from aqueous solutions of Co(NO3)2, (NH4)2HPO4, and NH4 (pH 4—7, 65 °C, 6 h), followed by annealing of the obtained Co3(PO4)2·8H2O powder at 600 °C for 1 h in air.
ChemInform Abstract: Highly Enantioselective Construction of Tertiary Thioethers and Alcohols via Phosphine‐Catalyzed Asymmetric γ‐Addition Reactions of 5H‐Thiazol‐4‐ones and 5H‐Oxazol‐4‐ones: Scope and Mechanistic Understandings.
Authors: Wang Tianli , Yu Zhaoyuan , Hoon Ding Long , Huang Kuo‐Wei , Lan Yu , Lu Yixin 
Published: November 2015

AbstractFor the first time, amino‐acid derived bifunctional phosphines are used as catalysts to synthesize a wide range of substituted thiazolone and oxazolone derivatives.
ChemInform Abstract: An Inverse Electron‐Demand Diene‐Transmissive Hetero‐Diels—Alder Reaction of N‐Sulfonyl‐[3]‐1‐azadendralenes for Stereocontrolled Synthesis of Polyhydroquinolines.
Authors: Kanai Kan , Kobayashi Satoru , Kudo Kenji , Honjo Takuya , Otani Takashi , Saito Takao 
Published: November 2015

AbstractThe hetero‐Diels—Alder reaction of azatrienes (I) with vinyl ethers proceeds with high regio‐ and stereoselectivity to give cycloadducts (III).
ChemInform Abstract: A Well‐Defined Aluminum‐Based Lewis Acid as an Effective Catalyst for Diels—Alder Transformations.
Authors: Liu Zhizhou , Lee Jazreen Hui Qi , Ganguly Rakesh , Vidovic Dragoslav 
Published: November 2015

AbstractA complex formed by mixing a β‐diketimine stabilized aluminum bistriflate (KAB) with the tetrakisarylboron salt (NAB) generates a more robust catalyst system for standard‐type Diels—Alder reactions.
ChemInform Abstract: Direct Transformation of Esters into Arenes with 1,5‐Bifunctional Organomagnesium Reagents.
Authors: Link Achim , Fischer Christian , Sparr Christof 
Published: November 2015

AbstractThis efficient and practical method enables the one‐step defunctionalization of various carboxylic acid esters to prepare benzene, anthracene, tetracene, and pentacene derivatives.
ChemInform Abstract: Pd‐Catalyzed Allylic Alkynylation of Allylic Acetates with Terminal Alkynes
Authors: Yang Qingjing , Zhou Yongyun , Chen Jingchao , He Xiaobo , Xu Jianbin , Kwong Fuk Yee , Fan Baomin 
Published: November 2015

Abstractaffording 1,4‐enynes under mild reaction conditions
ChemInform Abstract: B(C6F5)3‐Catalyzed Methylation of Amines Using CO2 as a C1 Building Block.
Authors: Yang Zhenzhen , Yu Bo , Zhang Hongye , Zhao Yanfei , Ji Guipeng , Ma Zhishuang , Gao Xiang , Liu Zhimin 
Published: November 2015

AbstractVarious N‐alkylanilines, dialkylamines, and primary anilines are utilized for the methylation reaction using B(C6F5)3 as efficient metal‐free catalyst.
ChemInform Abstract: Dialkyl Ether Formation by Nickel‐Catalyzed Cross‐Coupling of Acetals and Aryl Iodides.
Authors: Arendt Kevin M. , Doyle Abigail G. 
Published: November 2015

AbstractThe title ether are chemoselectively obtained by a mild, base‐free, and functional‐group tolerant C—C bond‐forming approach.
ChemInform Abstract: Silver(I)‐Catalyzed Regioselective Construction of Highly Substituted α‐Naphthols and Its Application Toward Expeditious Synthesis of Lignan Natural Products.
Authors: Naresh Gunaganti , Kant Ruchir , Narender Tadigoppula 
Published: November 2015

AbstractThe highly substituted α‐naphthols, binaphthols, and anthracenol are synthesized from β‐ketoesters and alkynes using the title method with high regioselectivity.
ChemInform Abstract: Organocatalyzed Cascade Aza‐Michael/Michael Addition for the Asymmetric Construction of Highly Functionalized Spiropyrazolone Tetrahydroquinolines.
Authors: Li Jun‐Hua , Du Da‐Ming 
Published: November 2015

AbstractAn organocatalyzed diastereo‐ and enantioselective cascade aza‐Michael/Michael addition of 2‐tosylaminoenones (II) to unsaturated pyrazolones is developed to afford novel chiral spiropyrazolone tetrahydroquinolines containing three contiguous stereocenters.
ChemInform Abstract: Access to Enantioenriched 2,3‐ and 2,5‐Dihydrofurans with a Fully Substituted C2 Stereocenter by Pd‐Catalyzed Asymmetric Intermolecular Heck Reaction.
Authors: Borrajo‐Calleja Gustavo M. , Bizet Vincent , Buergi Thomas , Mazet Clement 
Published: November 2015

AbstractA palladium‐catalyzed intermolecular asymmetric Heck reaction of various dihydrofuran derivatives is reported.
ChemInform Abstract: A One‐Pot Diastereoselective Synthesis of 2‐[Aryl(hydroxy)methyl]‐6‐methyl‐2H‐furo[3,2‐c]pyran‐3,4‐diones: Crystallographic Evidence for the Furanone Ring Closure.
Authors: Abdi Yamina , Boutemeur‐Kheddis Baya , Hamdi Maamar , Talhi Oualid , Almeida Paz Filipe A. , Kirsch Gilbert , Silva Artur M. S. 
Published: November 2015

Abstract10 Title compounds are prepared by a diastereoselective synthesis.
ChemInform Abstract: Expedient Access to Unsymmetrical Diarylindolylmethanes Through Palladium‐Catalyzed Domino Electrophilic Cyclization—Extended Conjugate Addition Approach.
Authors: Reddy Virsinha , Vijaya Anand Ramasamy 
Published: November 2015

AbstractAnnulation of o‐alkynylanilines [e.g. (II)] is followed by 1,6‐conjugate addition with quinone methides to give diarylindolylmethanes under mild conditions in moderate to excellent yields with broad substrate scope.
ChemInform Abstract: Reactivity of Carbon Dioxide in Hydrofluoroethers: A Facile Access to Cyclic Carbonates.
Authors: Mamone Marius , Milcent Thierry , Crousse Benoit 
Published: November 2015

AbstractThe high solubility of CO2 in hydrofluoroethers provides access to various cyclic carbonates (III) with excellent selectivities and yields.
ChemInform Abstract: Asymmetric Conjugate Addition of Alkylzirconocenes to Cyclopent‐4‐ene‐1,3‐dione Monoacetals.
Authors: Rideau Emeline , Maesing Florian , Fletcher Stephen P. 
Published: November 2015

AbstractThe title reaction tolerates various functional groups and gives highly functionalized cyclopentanone derivatives with good levels of enantioselectivity.
ChemInform Abstract: Divergent Synthesis of Imidazoles and Quinazolines via Pd(OAc)2‐Catalyzed Annulation of N‐Allylamidines.
Authors: Xu Li , Li Hongxian , Liao Ziyang , Lou Kaiyan , Xie Hexin , Li Hao , Wang Wei 
Published: November 2015

AbstractQuinazolines are synthesized as the major products under microwave irradiation in a sealed system, but when the reactions are run under air and in the presence of a ligand, only imidazoles are obtained.
ChemInform Abstract: Double N,B‐Type Bidentate Boryl Ligands Enabling a Highly Active Iridium Catalyst for C—H Borylation.
Authors: Wang Guanghui , Xu Liang , Li Pengfei 
Published: November 2015

AbstractA dipyridinyl tetraaminodiborane derivative serves as the preligand for the regioselective C—H borylation of a diverse range of electronically and sterically varying aromatic and heteroaromatic compounds.
ChemInform Abstract: Copper‐Catalyzed γ‐Selective and Stereospecific Allylic Cross‐Coupling with Secondary Alkylboranes.
Authors: Yasuda Yuto , Nagao Kazunori , Shido Yoshinori , Mori Seiji , Ohmiya Hirohisa , Sawamura Masaya 
Published: November 2015

AbstractUtilisation of triphenylphosphine as a ligand allows for the coupling of alkyl‐9‐BBN derivatives with a variety of silicon‐ and non‐silicon‐containing cyclic and acyclic allylic (Z)‐phosphates.
ChemInform Abstract: Highly Thermally Conductive and Mechanically Strong Graphene Fibers.
Authors: Xin Guoqing , Yao Tiankai , Sun Hongtao , Scott Spencer Michael , Shao Dali , Wang Gongkai , Lian Jie 
Published: November 2015

AbstractGraphene fibers are fabricated by wet‐spinning an aqueous large‐size and small‐size graphene oxide (GO) dispersion in a rotating Me3N(C16H33)Br or CaCl2 coagulation bath.
Umsetzung von Dimethylether zu Kraftstoffen mit hierachischen Zeolithkatalysatoren
Authors: Zimmermann Michael , Otto Thomas N. , Powietzka Bernhard , Neumann‐Walter Doreen 
Published: November 2015

AbstractDiese Arbeit hat die Entwicklung von H‐ZSM‐5 Katalysatoren zur Umwandlung von Dimethylether in benzinartige Kohlenwasserstoffe zum Ziel. Zur Verbesserung der Standzeit und Selektivität des Katalysators wurden Mesoporen in die Grundstruktur von H‐ZSM‐5 eingeführt. Zum einen wurden industrielle ZSM‐5 postsynthetisch desiliziert, zum anderen mittels einer Softtemplat‐vermittelten Synthese direkt hergestellt. Die Proben wurden eingehend analytisch untersucht und die gebräuchlichen Auswerteverfahren kritisch betrachtet. Das Oberfläche/Volumen‐Verhältnis der Mesoporen wird als neue Kennzahl vorgestellt. Die Testung der Katalysatoren erfolgte in einer Laboranlage. Die Ergebnisse weisen auf ein komplexes Zusammenwirken von Säurezentren und Mesoporosität hin.
Electrode Build‐Up of Reducible Metal Composites toward Achievable Electrochemical Conversion of Carbon Dioxide
Authors: Lee Seunghwa , Lee Jaeyoung 
Published: November 2015

AbstractAt the beginning of the 21st century, our world is faced with a global‐warming problem due to the continuous increase in carbon dioxide emission, and thus, the development of novel experimental techniques is needed. The electrochemical conversion of carbon dioxide into high‐value organic compounds could be of vital importance to solve this issue. The biggest challenge has always been to develop an electrocatalyst that is chemically active and structurally stable. Herein, previous studies, recent approaches, and current points of view on the electrode structure of metal oxide composites for the advanced electrochemical conversion of carbon dioxide are reviewed.
Reducing eating disorder symptoms and risk factors using the internet: A meta‐analytic review
Authors: Melioli Tiffany , Bauer Stephanie , Franko Debra L. , Moessner Markus , Ozer Fikret , Chabrol Henri , Rodgers Rachel F. 
Published: November 2015

ABSTRACTObjectiveThe purpose of this meta‐analytic review was, first, to evaluate the efficacy of Internet‐based programs in decreasing eating disorder (ED) symptoms, and, second, to identify moderator variables these effects.MethodTwenty studies were identified and between‐group effect sizes were calculated for ED symptoms and risk factors.ResultsCompared with control conditions, Internet‐based programs successfully decreased body dissatisfaction (d = 0.28, 95% CI [0.15–0.41], p < .001), internalization of the thin ideal (d = 0.36, 95% CI [0.07–0.65], p < .05), shape and weight concern (d = 0.42, 95% CI [0.13–0.71], p < .05), dietary restriction (d = 0.36, 95% CI [0.23–0.49], p < .001), drive for thinness (d = 0.47, 95% CI [0.33–0.60], p < .001), bulimic symptoms (d = 0.31, 95% CI [0.20–0.41], p < .001), purging frequency (d = 0.30, 95% CI [0.02–0.57], p < .05), and negative affect (d = 0.32, 95% CI [0.12–0.52], p < .001). Moderator analyses revealed no impact of data analytic strategy on intervention effects. Similarly, participant risk status was not a moderator for most outcomes.DiscussionInternet‐based programs are successful in decreasing ED symptoms and risk factors with small to moderate between‐group effect sizes.
A naturalistic examination of social comparisons and disordered eating thoughts, urges, and behaviors in college women
Authors: Fitzsimmons‐Craft Ellen E. , Ciao Anna C. , Accurso Erin C. 
Published: November 2015

ABSTRACTObjectiveWe examined the effects of body, eating, and exercise social comparisons on prospective disordered eating thoughts and urges (i.e., restriction thoughts, exercise thoughts, vomiting thoughts, binge eating urges) and behaviors (i.e., restriction attempts, exercising for weight/shape reasons, vomiting, binge eating) among college women using ecological momentary assessment (EMA).MethodParticipants were 232 college women who completed a 2‐week EMA protocol, in which they used their personal electronic devices to answer questions three times per day. Generalized estimating equation models were used to assess body, eating, and exercise comparisons as predictors of disordered eating thoughts, urges, and behaviors at the next report, adjusting for body dissatisfaction, negative affect, and the disordered eating thought/urge/behavior at the prior report, as well as body mass index.ResultsBody comparisons prospectively predicted more intense levels of certain disordered eating thoughts (i.e., thoughts about restriction and exercise). Eating comparisons prospectively predicted an increased likelihood of subsequent engagement in all disordered eating behaviors examined except vomiting. Exercise comparisons prospectively predicted less‐intense thoughts about exercise and an increased likelihood of subsequent vomiting.DiscussionSocial comparisons are associated with later disordered eating thoughts and behaviors in the natural environment and may need to be specifically targeted in eating disorder prevention and intervention efforts. Targeting body comparisons may be helpful in terms of reducing disordered eating thoughts, but eating and exercise comparisons are also important and may need to be addressed in order to decrease engagement in actual disordered eating behaviors. © 2015 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49:141–150).
Reproductive isolation is mediated by pollen incompatibility in sympatric populations of two Arnebia species
Authors: Wang Lin‐Lin , Zhang Chan , Tian Bin , Sun Xu‐Dong , Guo Wen , Zhang Ting‐Feng , Yang Yong‐Ping , Duan Yuan‐Wen 
Published: November 2015

AbstractTo explore uncertain aspects of the processes that maintain species boundaries, we evaluated contributions of pre‐ and postpollination reproductive isolation mechanisms in sympatric populations of Arnebia guttata and A. szechenyi. For this, we investigated their phylogenetic relationships, traits, microenvironments, pollinator visits, action of natural selection on floral traits, and the outcome of hand pollination between the two species. Phylogenetic analysis indicates that A. szechenyi is a derived species that could be closely related to A. guttata, and both could be diploid species. Arnebia guttata flowers have larger parts than A. szechenyi flowers, but smaller nectar guides. Soil supporting A. szechenyi had higher water contents than soil supporting neighboring populations of A. guttata (in accordance with their geographical distributions). The pollinators shared by the two species preferred A. szechenyi flowers, but interspecific visitations were frequent. We found evidence of conflicting selection pressures on floral tube length, flower diameter and nectar guide size mediated via male fitness, and on flower diameter and floral tube diameter via female fitness. Hand‐pollination experiments indicate complete pollen incompatibility between the two species. Our results suggest that postpollination prezygotic mechanisms are largely responsible for reproductive isolation of sympatric populations of the two Arnebia species.
Palladium‐Catalyzed Directed C(sp3)–H Arylation of Saturated Heterocycles at C‐3 Using a Concise Optimization Approach
Authors: Affron Dominic P. , Bull James A. 
Published: November 2015

AbstractSaturated heterocycles, such as THFs, pyrrolidines, piperidines and THPs, are essential components of many biologically active compounds. Examples of C–H functionalization on these important ring systems remain scarce, especially at unactivated positions. Here we report the development of conditions for the palladium‐catalyzed stereoselective C(sp3)–H arylation at unactivated 3‐positions of 5‐ and 6‐membered N‐ and O‐heterocycles with aminoquinoline directing groups. Subtle differences in substrate structures altered their reactivity significantly; and different conditions were required to achieve high yields in each case. Successful conditions were developed using a short empirical optimization approach to cover reaction space with a limited set of variables. Excellent cis‐selectivity was achieved in all cases, except for the THP substrate where minor trans‐products were formed through a different palladacyclic intermediate. Here, differences in reactivity and selectivity with other directing groups were examined.
Enhancement in Thermoelectric Properties of Cubic Ge2Sb2Te5 Thin Films by Introducing Structural Disorder
Authors: Kumar Manish , Vora‐ud Athorn , Seetawan Tosawat , Han Jeon Geon 
Published: November 2015

AbstractThermoelectric performances are usually enhanced by minimizing the thermal conductivity of materials, either by introducing superlattice structures or nanostructuring. Here, a new approach to performance enhancement, based on Seebeck coefficient improvement, is presented for Ge2Sb2Te5 thin films. The electron temperature was controlled by using pulsed direct current (DC) plasma power, and the resulting structural disorder of the cubic crystalline phase enhanced the Seebeck coefficients, as supported by molecular orbital calculations. Our results demonstrate a room‐temperature Seebeck coefficient of 190.8 μV K−1 for 200 nm films deposited on glass.
Distinct patterns of interaction between vegetation and morphodynamics
Authors: Oorschot Mijke van , Kleinhans Maarten , Geerling Gertjan , Middelkoop Hans 
Published: November 2015

AbstractDynamic interaction between river morphodynamics and vegetation affects river channel patterns and populations of riparian species. A range of numerical models exists to investigate the interaction between vegetation and morphodynamics. However, many of these models oversimplify either the morphodynamics or the vegetation dynamics, which hampers the development of predictive models for river management. We have developed a model coupling advanced morphodynamics and dynamic vegetation, which is innovative because it includes dynamic ecological processes and progressing vegetation characteristics as opposed to commonly used static vegetation without growth and mortality. Our objective is to understand and quantify the effects of vegetation‐type dependent settling, growth and mortality on the river pattern and morphodynamics of a meandering river. We compared several dynamic vegetation scenarios with different functional trait sets to reference scenarios without vegetation and with static vegetation without growth and mortality. We find distinct differences in morphodynamics and river morphology. The default dynamic vegetation scenario, based on two Salicaceae species, shows an active meandering behaviour, while the static vegetation scenario develops into a static, vegetation‐dominated state. The diverse vegetation patterns in the dynamic scenario reduce lateral migration, increase meander migration rate and create a smoother floodplain compared to the static scenario. Dynamic vegetation results in typical vegetation patterns, vegetation age distribution and river patterns as observed in the field. We show a quantitative interaction between vegetation and morphodynamics, where increasing vegetation cover decreases sediment transport rates. Furthermore, differences in vegetation colonization, density and survival create distinct patterns in river morphology, showing that vegetation properties and dynamics drive the formation of different river morphologies. Our model demonstrates the high sensitivity of channel morphodynamics to various species traits, an understanding which is required for floodplain and stream restoration and more realistic modelling of long‐term river development. Copyright © 2015 John Wiley & Sons, Ltd.