bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Discovery of Clostrubin, an Exceptional Polyphenolic Polyketide Antibiotic from a Strictly Anaerobic Bacterium.
Authors: Pidot Sacha , Ishida Keishi , Cyrulies Michael , Hertweck Christian 
Published: December 2014

AbstractTitle compound (I) is isolated as a deep purple pigment from Clostridium beijerinckii.
ChemInform Abstract: Antithrombotic Phenolics from the Stems of Parthenocissus tricuspidata Possess Antiinflammatory Effect.
Authors: Nguyen Phi‐Hung , Zhao Bing Tian , Lee Jeong Hyung , Kim Young Ho , Min Byung Sun , Woo Mi Hee 
Published: December 2014

AbstractCompounds (I), (II), (III) are isolated along with eight other phenolics from the stems of Parthenocissus tricuspidata.
ChemInform Abstract: High‐Density Monolayers of Metal Complexes: Preparation and Catalysis
Authors: Hara Kenji , Sawamura Masaya , Fukuoka Atsushi 
Published: December 2014

AbstractReview: [preparation of and catalysis by high‐density monolayers of Rh complexes with N‐heterocylic carbene complexes; 32 refs.
ChemInform Abstract: Two Non‐Isostructural Gadolinium Oxide Nitride Chalcogenides: Gd3ONSe2 and Gd3ONTe2.
Authors: Foltin Markus L. , Talmon‐Gros Pia , Schleid Thomas 
Published: December 2014

AbstractGd3ONSe2 (I) and Gd3ONTe2 (II) are prepared by the reaction of Gd with Gd2O3, NaN3, Se or Te, I2, and NaI as flux (evacuated silica tubes, 850—950 °C, 7 d).
ChemInform Abstract: A Highly Efficient and Recyclable Molybdate Sulfuric Acid (MSA) Catalyst for the Synthesis of Dimethyl (2,3‐Dihydro‐1H‐inden‐6‐ylamino) (Substituted) Methylphosphonates under Microwave Irradiation.
Authors: Reddy Mudumala Veeranarayana , Reddy Gangireddy Chandra Sekhar , Jeong Yeon Tae 
Published: December 2014

AbstractA green and efficient approach for the synthesis of the title compounds is achieved by three‐component neat Kabachnik‐Fields reaction.
ChemInform Abstract: Kinetic Resolution of C1‐Substituted Oxabenzonorbornadienes by Ir‐Catalyzed Asymmetric [2 + 2] Cycloaddition Reactions with Arylacetylenes.
Authors: Yang Qingjing , Yu Lu , Xu Jianbin , Li Sifeng , Liu Shanshan , Chen Hualei , Zhou Yongyun , Wang Lin , Fan Baomin 
Published: December 2014

AbstractCyclobutene cycloaddition products (III) and unreacted oxabenzonorbornadienes (I) are obtained with high to excellent enantiomeric excesses.
ChemInform Abstract: Catalytic Amide Allylation of α‐Ketoesters: Extremely High Enantioselective Synthesis of Ester Functionalized α‐Methylene‐γ‐butyrolactones.
Authors: Takahashi Masaki , Murata Yusuke , Ishida Masahiro , Yagishita Fumitoshi , Sakamoto Masami , Sengoku Tetsuya , Yoda Hidemi 
Published: December 2014

AbstractThe previously reported carbonyl allylation of isatin derivatives with β‐amido‐functionalized allylstannanes is extended towards the challenging utilization of α‐ketoesters as acyclic 1,2‐dicarbonyl substrates.
ChemInform Abstract: Synthesis of Pyrimidine, Dihydropyrimidinone, and Dihydroimidazole Derivatives under Free Solvent Conditions and their Antibacterial Evaluation.
Authors: Soliman Ahmed M. , Mohamed Shaaban K. , El‐Remaily Mahmoud. Abd El Aleem. Ali. , Abdel‐Ghany H. 
Published: December 2014

AbstractCompounds (IIIa), (VII), (XI), and (XV) have the highest antibacterial activity of the presented compounds.
ChemInform Abstract: Zincocene and Dizincocene N‐Heterocyclic Carbene Complexes and Catalytic Hydrogenation of Imines and Ketones.
Authors: Jochmann Phillip , Stephan Douglas W. 
Published: December 2014

AbstractNHC‐complexes of zincocenes are developed and screened as moderately efficient catalyst for the catalytic hydrogenation of imines and ketones.
ChemInform Abstract: Facile, High‐Yielding Preparation of Pyrrolidinium, Piperidinium, Morpholinium and 2,3‐Dihydro‐1H‐isoindolinium Salts and Ionic Liquids from Secondary Amines.
Authors: Ward Antony J. , Masters Anthony F. , Maschmeyer Thomas 
Published: December 2014

AbstractMicrowave‐assisted reaction of secondary amines with dibromoalkanes in the presence of potassium carbonate followed by anion exchange with LiNTf2 affords the title salts in good yields.
ChemInform Abstract: Hydroxyl and Ester Functionalized N‐Heterocyclic Carbene Complexes of Iridium(I): Efficient Catalysts for Transfer Hydrogenation Reactions.
Authors: Guelcemal Derya , Goekce Aytac Guerhan , Guelcemal Sueleyman , Cetinkaya Bekir 
Published: December 2014

AbstractThe catalyst is recycled and reused in four additional catalytic cycles without loss of activity.
ChemInform Abstract: Cyclopropanation of Diazoesters with Styrene Derivatives Catalyzed by Magnetically Recoverable Copper‐Plated Iron Nanoparticles.
Authors: Ishikawa Shingo , Hudson Reuben , Masnadi Mitra , Bateman Mary , Castonguay Annie , Braidy Nadi , Moores Audrey , Li Chao‐Jun 
Published: December 2014

AbstractThe reaction of (I) and aliphatic alkenes other than (IIf), such as hex‐1‐ene, methyl acrylate, and ethenyl acetate, yields the corresponding cyclopropanated products in trace amounts only.
ChemInform Abstract: A Facile Route for the Synthesis of Novel Heterocyclic Prostaglandin F2α Analogues.
Authors: Shankar M. , Mohan H. Rama , Prasad U. Viplava , Harikrishna M. , Rao M. P. Pareswar , Ravindra A. 
Published: December 2014

AbstractA general method for the preparation of heterocyclic prostaglandins with variations in the ω‐side chain is presented.
ChemInform Abstract: Redox‐Triggered C—C Coupling of Alcohols and Vinyl Epoxides: Diastereo‐ and Enantioselective Formation of All‐Carbon Quaternary Center via tert‐(Hydroxy)‐Prenylation.
Authors: Feng Jiajie , Garza Victoria J. , Krische Michael J. 
Published: December 2014

AbstractThe same products are prepared starting from oxirane substrates and alcohols or aldehydes, in the latter case requiring the addition of iPrOH.
ChemInform Abstract: Copper‐Catalyzed One‐Pot Denitrogenative‐Dehydrogenative‐Decarboxylative Coupling of β‐Ketoacids with Trifluorodiazoethane: Facile Access to Trifluoromethylated Aldol Products.
Authors: Xiong Heng‐Ying , Yang Zhen‐Yan , Chen Zhen , Zeng Jun‐Liang , Nie Jing , Ma Jun‐An 
Published: December 2014

AbstractThe novel copper‐catalyzed cross‐coupling of β‐ketoacids with in situ generated trifluorodiazoethane proceeds under mild conditions to give trifluoromethylated aldol products.
ChemInform Abstract: Efficient Synthesis of Tertiary α‐Hydroxy Ketones Through CO2‐Promoted Regioselective Hydration of Propargylic Alcohols.
Authors: He Haitao , Qi Chaorong , Hu Xiaohan , Guan Yuqi , Jiang Huanfeng 
Published: December 2014

AbstractIt is assumed that the reaction proceeds via a tandem process of carbon dioxide incorporation into propargylic alcohols and subsequent hydrolysis.
ChemInform Abstract: An Efficient Regioselective Hydrodifluoromethylation of Unactivated Alkenes with TMSCF2CO2Et at Ambient Temperature.
Authors: Ma Guobin , Wan Wen , Li Jialiang , Hu Qingyang , Jiang Haizhen , Zhu Shizheng , Wang Jing , Hao Jian 
Published: December 2014

AbstractThe introduction of a terminal CF2COOEt group in a broad range of simple and complex alkenes under very mild conditions is reported.
ChemInform Abstract: C—H Arylation of Azaheterocycles: A Direct Ligand‐Free and Cu‐Catalyzed Approach Using Diaryliodonium Salts.
Authors: Kumar Dalip , Pilania Meenakshi , Arun V. , Pooniya Savita 
Published: December 2014

AbstractThis efficient direct C‐H arylation strategy gives access to various arylated azaheterocycles by using readily available diaryliodonium salts.
ChemInform Abstract: Practical, Modular, and General Synthesis of Benzofurans Through Extended Pummerer Annulation/Cross‐Coupling Strategy.
Authors: Murakami Kei , Yorimitsu Hideki , Osuka Atsuhiro 
Published: December 2014

AbstractThe reaction of ketene dithioacetal monoxides with phenols to synthesize multisubstituted furans is presented.
ChemInform Abstract: Highly Enantioselective Synthesis of Bisoxindoles with Two Vicinal Quaternary Stereocenters via Lewis Base Mediated Addition of Oxindoles to Isatin‐Derived Ketimines.
Authors: Tang Zhongkai , Shi Yan , Mao Haibin , Zhu Xuebin , Li Weipeng , Cheng Yixiang , Zheng Wen‐Hua , Zhu Chengjian 
Published: December 2014

AbstractA diastereoselective and enantioselective addition of 3‐substituted‐2‐oxindoles to N‐Boc ketimines catalyzed by a chiral Lewis base catalyst is reported.
ChemInform Abstract: Rh(I)‐Catalyzed Asymmetric 1,2‐Additions of Arylboronic Acids to Isatins with Chiral Sulfur—Alkene Hybrid Ligands.
Authors: Feng Xiangqing , Nie Yanzhao , Zhang Lanqiong , Yang Jing , Du Haifeng 
Published: December 2014

AbstractThe title reaction provides a variety of 3‐aryl‐3‐hydroxy‐2‐oxindoles in moderate to excellent yields with enantioselectivities up to 85%.
ChemInform Abstract: Efficient and Mild Cyclization Procedures for the Synthesis of Novel 2‐Amino‐4H‐pyran Derivatives with Potential Antitumor Activity.
Authors: Wang Dao‐Cai , Xie Yong‐Mei , Fan Chen , Yao Shun , Song Hang 
Published: December 2014

AbstractAmong the tested title compounds (IV), derivatives (IVc) and (IVd) exhibit noticeable growth inhibitory activity against the subtotal tested subpanal tumor cell lines.
ChemInform Abstract: The Benzoyl Peroxide‐Promoted Functionalization of Simple Alkanes with 2‐Aryl Phenyl Isonitrile.
Authors: Sha Wanxing , Yu Jin‐Tao , Jiang Yan , Yang Haitao , Cheng Jiang 
Published: December 2014

Abstractleading to a variety of phenanthridines
ChemInform Abstract: Formal [3 + 2] Cycloaddition of 1‐Cyanocyclopropane 1‐Ester with Pyridine, Quinoline or Isoquinoline: A General and Efficient Strategy for Construction of Cyanoindolizine Skeletons.
Authors: Liu Juanjuan , Zhou Lanxiang , Ye Weijian , Wang Cunde 
Published: December 2014

AbstractThe reaction of 1‐cyanocyclopropane 1‐esters (I) with pyridine as both a substrate and a solvent leads to 3‐cyanoindolizines (III), whilst the reaction with an equimolar amount of pyridine in toluene as solvent affords isomeric 1‐cyanoindolizines (IV).
ChemInform Abstract: α,β‐Epoxy Esters in Multiple C—O/C—N Bond‐Breaking/Formation with 2‐Aminopyridines; Synthesis of Biologically Relevant (Z)‐2‐Methyleneimidazo[1,2‐a]pyridin‐3‐ones.
Authors: Guchhait Sankar K. , Priyadarshani Garima , Hura Neha 
Published: December 2014

AbstractApplication of the alkyl epoxy ester ethyl 3‐methyloxirane‐2‐carboxylate gives a complex reaction mixture.
ChemInform Abstract: Base‐Controlled Selectivity in the Synthesis of Linear and Angular Fused Quinazolinones by a Palladium‐Catalyzed Carbonylation/Nucleophilic Aromatic Substitution Sequence.
Authors: Chen Jianbin , Natte Kishore , Spannenberg Anke , Neumann Helfried , Langer Peter , Beller Matthias , Wu Xiao‐Feng 
Published: December 2014

AbstractThe Pd‐catalyzed carbonylative coupling of ortho‐fluoro substituted bromobenzenes with 2‐aminopyridines is reported.
ChemInform Abstract: Asymmetric, Stereodivergent Synthesis of (‐)‐Clusianone Utilizing a Biomimetic Cationic Cyclization.
Authors: Boyce Jonathan H. , Porco John A. Jr. 
Published: December 2014

AbstractTitle compound (I), the antipode of the natural product, is prepared in order to elaborate suitable approaches to the biologically interesting triketone core.
ChemInform Abstract: Synthesis of Multiply Arylated Heteroarenes, Including Bioactive Derivatives, via Palladium‐Catalyzed Direct C—H Arylation of Heteroarenes with (Pseudo)Aryl Halides or Aryliodonium Salts
Authors: Rossi Renzo , Bellina Fabio , Lessi Marco , Manzini Chiara , Perego Luca A. 
Published: December 2014

AbstractReview: [228 refs.
Äußerer Wärmeübergangskoeffizient bei der Kondensation von Reinstoffen an einem horizontalen Rippenrohr. Determination of the Outer Condensation Heat Transfer Coefficient of Pure Fluids on a Horizontal Low‐Finned Tube
Authors: Reif Anna , Büchner Alexander , Rehfeldt Sebastian , Klein Harald 
Published: December 2014

AbstractFür die Auslegung von Wärmeübertragern mit niedrig berippten Rohren fehlen aussagekräftige Referenzanwendungen in der öffentlichen Literatur. Hier wurde bei der Kondensation von iso‐Propanol, iso‐Oktan und n‐Pentan der äußere Wärmeübergangskoeffizient an horizontalen Glatt‐ und Rippenrohren aus Stahl experimentell bestimmt. Rippenrohre steigerten den äußeren Wärmeübergangskoeffizient um mindestens den Faktor 3. Theoretische Modelle, die für die Kondensation von Kältemitteln an Rippenrohren aus Kupfer entwickelt wurden, können bei den hier durchgeführten Messungen nur bedingt angewendet werden.
Structure and Thermodynamics of Mg:Phosphate Interactions in Water: A Simulation Study
Authors: Kumar Manjeet , Simonson Thomas , Ohanessian Gilles , Clavaguéra Carine 
Published: December 2014

AbstractThe association of Mg2+ and H2PO4− in water can give insights into Mg:phosphate interactions in general, which are very widespread, but for which experimental data is surprisingly sparse. It is studied through molecular dynamics simulations (>100 ns) by using the polarizable AMOEBA force field, and the association free energy is computed for the first time. Explicit consideration of outer‐sphere and two types of inner‐sphere association provides considerable insight into the dynamics and thermodynamics of ion pairing. After careful assessment of the computational approximations, the agreement with experimental values indicates that the methodology can be extended to other inorganic and biological Mg:phosphate interactions in solution.
Luminescence Properties of Ca2Ga2SiO7:RE Phosphors for UV White‐Light‐Emitting Diodes
Authors: Jiao Mengmeng , Lv Wenzhen , Lü Wei , Zhao Qi , Shao Baiqi , You Hongpeng 
Published: December 2014

AbstractA series of Eu2+‐, Ce3+‐, and Tb3+‐doped Ca2Ga2SiO7 phosphors is synthesized by using a high‐temperature solid‐state reaction. The powder X‐ray diffraction and structure refinement data indicate that our prepared phosphors are single phased and the phosphor crystalizes in a tetrahedral system with the ${P\bar 42m}$ (113) space group. The Eu2+‐ and Ce3+‐doped phosphors both have broad excitation bands, which match well with the UV light‐emitting diodes chips. Under irradiation of λ=350 nm, Ca2Ga2SiO7:Eu2+ and Ca2Ga2SiO7:Ce3+, Li+ have green and blue emissions, respectively. Luminescence of Ca2Ga2SiO7:Tb3+, Li+ phosphor varies with the different Tb3+ contents. The thermal stability and energy‐migration mechanism of Ca2Ga2SiO7:Eu2+ are also studied. The investigation results indicate that the prepared Ca2Ga2SiO7:Eu2+ and Ca2Ga2SiO7:Ce3+, Li+ samples show potential as green and blue phosphors, respectively, for UV‐excited white‐light‐emitting diodes.
Subtle Differences in Initial Membrane Interactions Underpin the Selectivity of Small Antimicrobial Peptides
Authors: Praporski Slavica , Mechler Adam , Separovic Frances , Martin Lisandra L. 
Published: December 2014

AbstractHost‐secreted antimicrobial peptides (AMPs) are found in virtually all organisms, often providing innate immunity as the first line of defence against pathogens. Many AMPs kill pathogens by disrupting their cellular membranes and thus are similar to some antibiotic drugs. Likely drug candidate AMPs are found in non‐mammalian hosts but are also haemolytic. Thus, it is crucial to understand the origins of membrane specificity and selectivity of the action of these AMPs. In this study, the membrane specificity of action of citropin 1.1, a 16‐residue AMP, was studied by using a quartz crystal microbalance on the basis of mass and viscoelasticity changes in comparison to aurein 1.2 (13 residues) and maculatin 1.1 (21 residues). The membrane selectivity was largely reflected in the nature of the initial interaction of the peptide with the membrane. This initial interaction might determine whether the peptide transforms into a membrane‐disrupting α‐helical conformation and highlights subtle differences in the repositioning of this α‐helical peptide in the membrane, as reflected by the viscoelasticity data, thus signifying the mechanistic pathway to membrane disruption.
Design of logical topology with K‐connected constraints and channel assignment for multi‐radio wireless mesh networks
Authors: Bao Xuecai , Tan Wenqun , Nie Jugen , Lu Changlong , Jin Guanglang 
Published: December 2014

SummaryIn multi‐radio multi‐channel wireless mesh networks, the design of logical topology is different from that in single channel wireless mesh networks. The same channel assignment algorithm used for various logical topologies will lead to diverse network performance. In this paper, we study the relationship between k‐connected logical topology and the maximum number of assigned channels. Meanwhile, we analyze the issues affecting channel assignment performance, and present the lower and upper bounds of the maximum allowable number of assigned channels for k‐connected logical topology. We then develop a k‐connected logical topology design algorithm based on shortest disjoint paths and minimum interference disjoint paths for each node‐pair. In addition, we propose a static channel assignment algorithm according to minimum spanning tree search. Extensive simulations show that our proposed algorithm achieves higher throughput and lower end‐to‐end delay than fault tolerant topology control algorithms, which validates the involved trade‐off between path length and nodal interference. Moreover, numerical results demonstrate that our proposed channel assignment further improves network performance under the context of limited radio interfaces. Copyright © 2014 John Wiley & Sons, Ltd.
Efficient data retrieval algorithms for multiple requests in MIMO wireless networks
Authors: He Ping , Shen Hong , Guo Longkun , Li Yidong 
Published: December 2014

SummaryGiven a set of multiple channels, a set of multiple requests, where each request contains multiple requested data items and a client equipped with multiple antennae, the multi‐antenna‐based multirequest data retrieval problem (DRMR‐MA) is to find a data retrieval sequence for downloading all data items of the requests allocated to each antenna, such that the maximum access latency of all antennae is minimized. Most existing approaches for the data retrieval problem focus on either single antenna or single request and are hence not directly applicable to DRMR‐MA for retrieving multiple requests. This paper proposes two data retrieval algorithms that adopt two different grouping schemes to solve DRMR‐MA so that the requests can be suitably allocated to each antenna. To find the data retrieval sequence of each request efficiently, we present a data retrieval scheme that converts a wireless data broadcast system to a special tree. Experimental results show that the proposed scheme is more efficient than other existing schemes. Copyright © 2014 John Wiley & Sons, Ltd.
Analysis of priority arbitration in low‐rate CSMA/CA‐based differentiated access with throughput optimization
Authors: Ashrafuzzaman Kazi , Fapojuwo Abraham O. 
Published: December 2014

SummaryA class of applications, such as home energy management and control and utility data acquisition, is emerging in recent times where smart meters, sensors, and appliances are networked together for intelligent management and coordination. Such applications rely on low data rate communication of monitoring and control information at large scale. For the underlying networking infrastructure to facilitate communication of the real‐time and intermittent packet traffic expected, random access‐based protocols are regarded as suitable medium access control solutions. A key challenge in this regard is that the random access protocols are prone to throughput degradation when the number of contending nodes grows, as expected with the infrastructures involved. Besides, provision for certain degree of criticality/priority is needed for some of the packets compared with the rest. With this background, this paper analytically determines the criterion for throughput‐optimal operations in a network based on low‐ratecarrier sense multiple accessprotocol. In addition, ways to provide priority‐wise access differentiation at arbitrary proportions without a negative impact on the achievable throughput is incorporated within abinary exponential backoff‐basedcollision avoidance scheme. Discrete‐event simulations are performed to validate the accuracy of the approximations made in analysis.
CRISPR/Cas9‐mediated genome modification in the mollusc, Crepidula fornicata
Authors: Perry Kimberly J. , Henry Jonathan Q. 
Published: December 2014

SummaryThe discovery and application of the CRISPR/Cas9 genome editing method has greatly enhanced the ease with which transgenic manipulation can occur. We applied this technology to the mollusc, Crepidula fornicata, and have successfully created transgenic embryos expressing mCherry fused to endogenous β‐catenin. Specific integration of the fluorescent reporter was achieved by homologous recombination with a β‐catenin‐specific donor DNA containing the mCherry coding sequence. This fluorescent gene knock‐in strategy permits in vivo observations of β‐catenin expression during embryonic development and represents the first demonstration of CRISPR/Cas9‐mediated transgenesis in the Lophotrochozoa superphylum. The CRISPR/Cas9 method is a powerful and economical tool for genome modification and presents an option for analysis of gene expression in not only major model systems, but also in those more diverse species that may not have been amenable to the classic methods of transgenesis. This approach will allow one to generate transgenic lines of snails for future studies. genesis 53:237–244, 2015. © 2014 Wiley Periodicals, Inc.
Computational Insights into the Isomerism of Hexacoordinate Metal–Sarcophagine Complexes: The Relationship between Structure and Stability
Authors: Algarra Andrés G. 
Published: December 2014

AbstractThe hexacoordinate complexes that the macrobicyclic ligands {(NH3)2sar}2+ and {(NMe3)2sar}2+ (sar = 3,6,10,13,16,19‐hexaazabicyclo[6.6.6]icosane) form with transition metals such as CoIII, CoII and CuII can adopt several isomeric structures. In this article, we have firstly employed DFT methods to compute the relative stability of their Δ‐ob3, Δ‐ob2lel, Δ‐lel2ob and Δ‐lel3 isomers, as well as the activation barriers for their interconversion. In agreement with the experimental data, the results show that, in general, the different isomers of the CoIII and CoII complexes present similar free energies, whereas the CuII complexes show a strong tendency towards the lel3 form. In addition, the interplay between the structure and stability of these species has been studied by combining shape maps with a distortion/interaction energy analysis. In contrast to the geometries close to the ideal octahedron that all the studied Co complexes present, the lel3 structures of [Cu{(NH3)2sar}]4+ and [Cu{(NMe3)2sar}]4+ are better described as trigonal prisms. In such structures the ligand adopts a conformation significantly more stable than in the other isomers, and this drives the formation of lel3‐[Cu{(NH3)2sar}]4+ and lel3‐[Cu{(NMe3)2sar}]4+. Overall, the results show a clear relationship between the stability of a given isomer and its degree of distortion with respect to the ideal octahedron (or trigonal prism), with the latter being ultimately dependent on the transition metal and its radius.