bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Unified Strategy for the Synthesis of Mucin Cores 1–4 Saccharides and the Assembled Multivalent Glycopeptides
Authors: Pett Christian , Schorlemer Manuel , Westerlind Ulrika 
Published: November 2013

AbstractBy displaying different O‐glycans in a multivalent mode, mucin and mucin‐like glycoproteins are involved in a plethora of protein binding events. The understanding of the roles of the glycans and the identification of potential glycan binding proteins are major challenges. To enable future binding studies of mucin glycan and glycopeptide probes, a method that gives flexible and efficient access to all common mucin core‐glycosylated amino acids was developed. Based on a convergent synthesis strategy starting from a shared early stage intermediate by differentiation in the glycoside acceptor reactivity, a common disaccharide building block allows for the creation of extended glycosylated amino acids carrying the mucin type‐2 cores 1–4 saccharides. Formation of a phenyl‐sulfenyl‐N‐Troc (Troc=trichloroethoxycarbonyl) byproduct during N‐iodosuccinimide‐promoted thioglycoside couplings was further characterized and a new methodology for the removal of the Troc group is described. The obtained glycosylated 9‐fluorenylmethoxycarbonyl (Fmoc)‐protected amino acid building blocks are incorporated into peptides for multivalent glycan display.
ChemInform Abstract: Structural Characterization of Sr4Mg4H4[CoH5]3 Shows the Importance of Support from Polarizing Counter Ions to 3d Transition Metal Hydrido Complexes.
Authors: Fahlquist Henrik , Kadir Karim , Noreus Dag 
Published: November 2013

AbstractThe title compound is prepared by high‐pressure solid state reaction of a 4:1:2 mixture of SrH2, Co, and Mg2CoH5 (autoclave, 60 bar H2, 873 K, 12 h).
ChemInform Abstract: In situ Raman Spectroscopy and X‐Ray Diffraction of Pressure‐Induced Phase Transition in Columbite CaNb2O6.
Authors: Zhou Jing , Feng Guanlin , Li Liang , Huang Fengxian , Shen Hongzhi , Yang Hang , Wang Wenquan , Zhou Qiang , Xu Dapeng 
Published: November 2013

AbstractMicrocrystalline CaNb2O6 samples from a crushed crystal are used for in situ Raman spectroscopy and synchrotron XRD in a diamond anvil cell up to 23 GPa.
ChemInform Abstract: On the (Non‐)existence of Tutton Salts with Formula Types [M(H2O)6] (ClO4)2(H2O)2 and Na2M(SO4)2(H2O)6 (M Is a First‐Row Transition Metal).
Authors: Weil Matthias 
Published: November 2013

AbstractThe structures of two Tutton salts, originally reported to be [Cu(H2O)6] (ClO4)2(H2O)2 (I) and Na2Cu(SO4)2(H2O)6 (II), are redetermined based on the original intensity data.
ChemInform Abstract: Structural Reinvestigation of the Photoluminescent Complex [NdCl2(H2O)6]Cl.
Authors: Hsieh Kuan‐Ying , Bendeif El‐Eulmi , Pillet Sebastien , Doudouh Abdelatif , Schaniel Dominik , Woike Theo 
Published: November 2013

AbstractThe structure of the title compound is redetermined by single crystal XRD at 100 K (monoclinic, P2/n, Z = 2).
ChemInform Abstract: X‐Ray Crystallographic and First‐Principles Theoretical Studies of K2[TcOCl5] and UV/Vis Investigation of the [TcOCl5]2‐ and [TcOCl4]‐ Ions.
Authors: Johnstone Erik V. , Weck Philippe F. , Poineau Frederic , Kim Eunja , Forster Paul M. , Sattelberger Alfred P. , Czerwinski Kenneth R. 
Published: November 2013

AbstractK2[TcOCl5] is isolated as green single crystals by dissolution of (NH4)TcO4 in 12 M HCl at 0 °C and precipitation with KCl.
ChemInform Abstract: A Hexanuclear Cobalt(II) Cluster Incorporated in a Banana‐Shaped Tungstovanadate: [(Co(OH2)Co2VW9O34)2 (VW6O26)]17‐.
Authors: Lv Hongjin , Song Jie , Geletii Yurii V. , Guo Weiwei , Bacsa John , Hill Craig L. 
Published: November 2013

AbstractNa17 [(Co(OH2)Co2VW9O34)2 (VW6O26)]·31H2O (I) is synthesized from Na2WO4, Co(NO3)2, and V2O5 in acetate buffer solution (pH 4.8, 80 °C, 2 h, 24% yield).
ChemInform Abstract: Controlling Stereochemistry in Polyketide Synthesis: 1,3‐ vs. 1,2‐Asymmetric Induction in Methyl Ketone Aldol Additions to β‐Super Siloxy Aldehydes.
Authors: Brady Patrick B. , Albert Brian J. , Akakura Matsujiro , Yamamoto Hisashi 
Published: November 2013

AbstractSuper silyl (tris(trialkylsilyl)) groups are utilized as efficient stereo‐directing β‐oxygen protective groups in aldol reactions.
ChemInform Abstract: Asymmetric Ti‐Crossed Claisen Condensation: Application to Concise Asymmetric Total Synthesis of Alternaric Acid.
Authors: Nagase Ryohei , Oguni Yumiko , Ureshino Satoko , Mura Hiroaki , Misaki Tomonori , Tanabe Yoo 
Published: November 2013

AbstractThe first TiCl4‐mediated asymmetric crossed‐Claisen condensation is reported.
ChemInform Abstract: [Cp*RhCl2]2‐Catalyzed ortho‐C—H Bond Amination of Acetophenone o‐Methyloximes with Primary N‐Chloroalkylamines: Convenient Synthesis of N‐alkyl‐2‐acylanilines.
Authors: Ng Ka‐Ho , Zhou Zhongyuan , Yu Wing‐Yiu 
Published: November 2013

AbstractThe corresponding N‐chloroalkylamines (II) and (IV) are prepared in situ by reaction of the primary amines with N‐chlorosuccinimide.
ChemInform Abstract: Preparation and Palladium‐Mediated Cross‐Coupling of α‐Benzoyloxyalkylzinc Bromides.
Authors: Sakata Komei , Urabe Daisuke , Inoue Masayuki 
Published: November 2013

AbstractVarious benzylic and allylic alcohol derivatives are coupled with aryl or vinyl iodides under mild reaction conditions without an affect of polar functional groups.
ChemInform Abstract: Palladium‐Catalyzed Arylic/Allylic Aminations: Permutable Domino Sequences for the Synthesis of Dihydroquinolines from Morita—Baylis—Hillman Adducts.
Authors: Lorion Melanie M. , Gasperini Danila , Oble Julie , Poli Giovanni 
Published: November 2013

AbstractA new pseudo domino sequence allows the synthesis of the title compounds.
ChemInform Abstract: Double Reformatsky Reaction: Divergent Synthesis of δ‐Hydroxy‐β‐ketoesters.
Authors: Mineno Masahiro , Sawai Yasuhiro , Kanno Kazuaki , Sawada Naotaka , Mizufune Hideya 
Published: November 2013

AbstractThe reaction of aldehydes and ketones with in situ generated zinc alkoxide tolerates a wide range of functional groups.
ChemInform Abstract: Silver‐Catalyzed Isocyanide‐Alkyne Cycloaddition: A General and Practical Method to Oligosubstituted Pyrroles.
Authors: Liu Jianquan , Fang Zhongxue , Zhang Qian , Liu Qun , Bi Xihe 
Published: November 2013

AbstractAg2CO3 is described as robust catalyst for the [3 + 2] cycloaddition of isocyanide and terminal or internal alkynes to provide 2,3‐disubstituted and 2,3,4‐trisubstituted pyrroles.
ChemInform Abstract: Synthesis of Indolines via Pd(II)‐Catalyzed Amination of C—H Bonds Using PhI(OAc)2 as the Bystanding Oxidant.
Authors: Mei Tian‐Sheng , Leow Dasheng , Xiao Han , Laforteza Brian N. , Yu Jin‐Quan 
Published: November 2013

AbstractA novel protocol for the title synthesis via a palladium‐catalyzed C—H activation/cyclization sequence is developed.
ChemInform Abstract: Synthesis and in vitro Biological Evaluation of Novel 2‐Aminoimidazolone Derivatives as Antitumor Agents.
Authors: Xiao You‐An , Wang Zhi‐Qiang , Wang Xue‐Min , Hui Yi , Ling Yong , Wang Xin‐Yang , He Li‐Qin 
Published: November 2013

AbstractEleven new derivatives of 2‐aminoimidazolone are synthesized successfully.
ChemInform Abstract: Enantioselective Bromoaminocyclization of Allyl N‐Tosylcarbamates Catalyzed by a Chiral Phosphine—Sc(OTf)3 Complex.
Authors: Huang Deshun , Liu Xiaoqin , Li Lijun , Cai Yudong , Liu Weigang , Shi Yian 
Published: November 2013

AbstractThe reaction proceeds with excellent enantioselectivity, tolerates a wide range of functional groups and can be carried out on a gram scale.
ChemInform Abstract: A Click Chemistry Approach to 5,5′‐Disubstituted‐3,3′‐bisisoxazoles from Dichloroglyoxime and Alkynes: Luminescent Organometallic Iridium and Rhenium Bisisoxazole Complexes.
Authors: Van der Peet Phillip L. , Connell Timothy U. , Gunawan Christian , White Jonathan M. , Donnelly Paul S. , Williams Spencer J. 
Published: November 2013

AbstractBisisoxazoles are prepared in one step by the dropwise addition of aqueous potassium hydrogen carbonate to a mixture of dichloroglyoxime and terminal alkynes.
ChemInform Abstract: A Facile Solvent‐Free One‐Pot Three‐Component Method for the Synthesis of 2‐Amino‐4H‐pyrans and Tetrahydro‐4H‐chromenes at Ambient Temperature.
Authors: Amirnejad Meysam , Naimi‐Jamal Mohammad Reza , Tourani Hesam , Ghafuri Hossein 
Published: November 2013

AbstractA highly efficient, simple, and fast procedure for the synthesis of 2‐amino‐4H‐pyrans from 1,3‐dicarbonyls, aromatic aldehydes, and malonitrile under utilization of ball milling is presented.
ChemInform Abstract: Polystyrene‐Supported GaCl3 as a Highly Efficient and Reusable Heterogeneous Lewis Acid Catalyst for the Three‐Component Synthesis of Benzoxanthene Derivatives.
Authors: Rahmatpour Ali 
Published: November 2013

AbstractA novel, general, mild, and eco‐friendly one‐pot method for the synthesis of the title compounds is presented including a simple work‐up procedure.
ChemInform Abstract: Benzimidazole‐Embedded N‐Fused Aza‐Indacenes: Synthesis and Deprotonation‐Assisted Optical Detection of Carbon Dioxide.
Authors: Ishida Masatoshi , Kim Pyosang , Choi Jiyoung , Yoon Juyoung , Kim Dongho , Sessler Jonathan L. 
Published: November 2013

AbstractTitle compounds (IV) and (VI) are prepared in low yields via a three component condensation of benzimidazole (I), trifluoroacetic acid (III), and either pyrrole (II) or indole (V), respectively.
ChemInform Abstract: Preparation of Pyridyl‐Substituted Monoazatriphenylenes.
Authors: Kopchuk D. S. , Zyryanov G. V. , Kovalev I. S. , Khasanov A. F. , Medvedevskikh A. S. , Rusinov V. L. , Chupakhin O. N. 
Published: November 2013

AbstractAn efficient method for the preparation of cycloalkene‐anellated derivatives of monoazatriphenylenes based on an aza‐Diels—Alder reaction of triazine (III) with 1‐morpholinocycloalkenes is presented.
ChemInform Abstract: Para Substituted Benzaldehydes as Expedient Reagents for the Oxidative Aromatization of Hydroquinoline.
Authors: Majumdar Poulomi , Pati Anita , Behera Rajani K. , Behera Ajaya Kumar 
Published: November 2013

AbstractThe reaction proceeds through an unprecedented hydride transfer from tetrahydroquinoline to arylaldehydes.
ChemInform Abstract: The Pseudo‐Michael Reaction of 1‐Aryl‐4,5‐dihydro‐1H‐imidazol‐2‐amines with Ethyl Ethoxymethylenecyanoacetate.
Authors: Kaczor Agnieszka A. , Kijkowska‐Murak Urszula , Pihlaja Kalevi , Sinkkonen Jari , Wysocki Waldemar , Karczmarzyk Zbigniew , Matosiuk Dariusz 
Published: November 2013

AbstractThe products (III) of the title reaction, on heating in acetic acid, undergo cyclization to 2,3‐imidazo[1,2a]pyrimidines (IV) only, whereas on melting, a mixture of compounds (IV) and (VI) is obtained due to transesterification during the chromatographic separation of the compounds (VI).
ChemInform Abstract: Synthesis and Biological Activity of Novel 3‐Heteroaryl‐2H‐pyrido[4,3‐e][1,2,4]thiadiazine and 3‐Heteroaryl‐2H‐benzo[e][1,2,4]thiadiazine 1,1‐Dioxides.
Authors: Gobis Katarzyna , Foks Henryk , Slawinski Jaroslw , Augustynowicz‐Kopec Ewa , Napiorkowska Agnieszka 
Published: November 2013

AbstractTitle compounds [(II), (V), and (VII)] are synthesized by cyclization of isolated or intermediate amidines, resp., and evaluated for their tuberculostatic and anticancer activities.
ChemInform Abstract: Synthesis of Some Novel Thieno[3,2‐d]pyrimidines as Potential Cytotoxic Small Molecules Against Breast Cancer.
Authors: Kandeel Manal , Abdelhameid Mohammed Kamal , Eman Kamal , Labib Madlen Berty 
Published: November 2013

AbstractThe design of the title compounds as small molecules with antitumor activity is based on DNA‐interchelating properties by hydrogen bond formation.
ChemInform Abstract: Synthesis of Highly Regioselective Bifunctional Tricyclic Tetrazole‐1H‐benzo[b][1,4]diazepins.
Authors: Shaabani Ahmad , Hezarkhani Zeinab , Mofakham Hamid , Ng Seik Weng 
Published: November 2013

AbstractTwo different procedures are presented for the synthesis of the title compounds via a two‐step condensation sequence of o‐phenylenediamines or 2‐nitroanilines with 3‐oxobutanoate, isocyanides, and trimethylsilyl azide.
ChemInform Abstract: Biophysical Studies of the Amyloid β‐Peptide: Interactions with Metal Ions and Small Molecules
Authors: Waermlaender Sebastian , Tiiman Ann , Abelein Axel , Luo Jinghui , Jarvet Jyri , Soederberg Kajsa L. , Danielsson Jens , Graeslund Astrid 
Published: November 2013

AbstractReview: 145 refs.
Prediction of CO2 Solubility in Polymers by Radial Basis Function Artificial Neural Network Based on Chaotic Self‐adaptive Particle Swarm Optimization and Fuzzy Clustering Method
Authors: Wu Yan , Liu Bingxiang , Li Mengshan , Tang Kezong , Wu Yubo 
Published: November 2013

AbstractTo replace costly and time‐consuming experimentation in laboratory, a novel solubility prediction model based on chaos theory, self‐adaptive particle swarm optimization (PSO), fuzzy c‐means clustering method, and radial basis function artificial neural network (RBF ANN) is proposed to predict CO2 solubility in polymers, hereafter called CSPSO‐FC RBF ANN. The premature convergence problem is overcome by modifying the conventional PSO using chaos theory and self‐adaptive inertia weight factor. Fuzzy c‐means clustering method is used to tune the hidden centers and radial basis function spreads. The modified PSO algorithm is employed to optimize the RBF ANN connection weights. Then, the proposed CSPSO‐FC RBF ANN is used to investigate solubility of CO2 in polystyrene (PS), polypropylene (PP), poly(butylene succinate) (PBS) and poly(butylene succinate‐co‐adipate) (PBSA), respectively. Results indicate that CSPSO‐FC RBF ANN is an effective method for gas solubility in polymers. In addition, compared with conventional RBF ANN and PSO ANN, CSPSO‐FC RBF ANN shows better performance. The values of average relative deviation (ARD), squared correlation coefficient (R2) and standard deviation (SD) are 0.1071, 0.9973 and 0.0108, respectively. Statistical data demonstrate that CSPSO‐FC RBF ANN has excellent prediction capability and high‐accuracy, and the correlation between prediction values and experimental data is good.
Semi‐automatic color analysis for brand logos
Authors: Bartneck Christoph , Clark Adrian 
Published: November 2013

AbstractBrand logos are essential for companies and their design is at the heart of graphic design. In a global market, the number of competing logos has grown exponentially. We present a software tool that helps designers to semi‐automatically analyze large sets of graphics. The results of the color analysis help designers to make informed choices for their designs. We present two case studies that demonstrate the operation of our software tools. The first case study analyzed the logos of countries: flags. The second case study analyzed the logos of financial institutions. In addition to the descriptive statistics, we also put the results of the color analysis into relation with social‐economic indicators. Our software tools have been successful at offering logo designers valuable information for the design of new logos. © 2013 Wiley Periodicals, Inc. Col Res Appl, 40, 72–84, 2015
The Viedma Deracemization of Racemic Conglomerate Mixtures as a Paradigm of Spontaneous Mirror Symmetry Breaking in Aggregation and Polymerization
Authors: Blanco Celia , Crusats Joaquim , El‐Hachemi Zoubir , Moyano Albert , Veintemillas‐Verdaguer Sabino , Hochberg David , Ribó Josep M. 
Published: November 2013

AbstractSimulations of a chemical kinetics model, based on the free‐energy relationships of classical primary nucleation theory, show that the deracemization phenomenon in systems of achiral or fast racemizing compounds yielding enantiopure crystals as the more stable solid phase is a true spontaneous mirror symmetry breaking process (SMSB). That is, the achievement of a stationary chiral state is more stable than the racemic one. The model translates the free‐energy relationships determined by the existence of a critical size cluster to a chemical kinetics model, in which the consideration of forward and backward reaction rate constants avoids the misuse of network parameters that violate thermodynamic constraints (microreversibility principle), which would lead to apparent in silico SMSB. The model provides qualitative agreement for deracemizations by mechanical attrition of visible crystals, as well as for those obtained under temperature gradients. The analysis of the effect of the system parameters to obtain a SMSB scenario shows that the network possesses the principal characteristics of SMSB networks: 1) an enantioselective autocatalytic stage, corresponding to the non‐linear kinetics of enantioselective (homochiral) cluster‐to‐cluster growth, and 2) the mutual inhibition step originating in the backward flow of chiral clusters towards smaller achiral clusters, or even to a racemizing monomer. The application of such a SMSB kinetic model to enantioselective polymerizations and to chiral biopolymers is discussed.
Effects of Inorganic Acid Modification on Photocatalytic Performance of TiO2 and Its Activity‐Enhanced Mechanism Related to Adsorbed O2
Authors: Cui Haiqin , Cao Yue , Jing Liqiang , Luan Yunbo , Li Na 
Published: November 2013

AbstractIn this work, commercial P25 TiO2 is modulated by post‐treatments with different acidic substances, and the effects of residual acidic substances on the photogenerated charge separation of TiO2 and its photocatalytic activity are investigated in detail. It is demonstrated by means of atmosphere‐controlled surface photovoltage spectroscopy that an increase in acid surface modification is favorable for improving the photogenerated charge separation of TiO2. As a result, its photocatalytic activity for the degradation of gas‐phase acetaldehyde is enhanced greatly. On the basis of measurements of O2 temperature‐programmed desorption of untreated and treated TiO2, it is confirmed that an increased amount of acid surface modification promotes the adsorption of O2 on TiO2. Hence, it is suggested for the first time that an increase in surface acidity through post‐treatment with an appropriate amount of acidic substance leads to a clear enhancement of the photocatalytic activity of TiO2 by promoting O2 adsorption, and thus, improving the photogenerated charge separation of TiO2. This work provides a feasible route for the synthesis of high‐activity oxide‐based semiconductor photocatalysts through surface modification with stable inorganic acids.
Schottky or Ohmic Metal–Semiconductor Contact: Influence on Photocatalytic Efficiency of Ag/ZnO and Pt/ZnO Model Systems
Authors: Yan Fengpo , Wang Yonghao , Zhang Jiye , Lin Zhang , Zheng Jinsheng , Huang Feng 
Published: November 2013

AbstractThe relationship between the contact type in metal–semiconductor junctions and their photocatalytic efficiencies is investigated. Two metal–semiconductor junctions, silver on zinc oxide (Ag/ZnO) and platinum on zinc oxide (Pt/ZnO) serve as model system for Ohmic and Schottky metal–semiconductor contact, respectively. Ag/ZnO, with Ohmic contact, exhibits a higher photocatalytic efficiency than Pt/ZnO, with Schottky contact. The direction of electric fields within the semiconductor is found to play a crucial role in the separation of photogenerated charges, and thus strongly influences the photocatalytic efficiency.
A servo design for slave clock in IEEE 1588 synchronization networks
Authors: Fan Zhiyu , Liu Yuan'an , Li Hu , Yuan Dongming , Hu Hefei 
Published: November 2013

SummaryClock synchronization is critical for a variety of applications in communication networks. In this paper, we design a clock servo named VI_PID‐K, which consists of a variable integral PID controller and a Kalman filter. It is a pre‐correction mechanism for the skew based on feedback principle to compensate for the poor stability of local clocks in IEEE 1588 networks. Our contribution is establishing discrete differential equation models, bringing in a variable integral PID controller to adjust the skew error and a Kalman filter to act as a skew estimator to predict the skew during one synchronization interval. Simulation results demonstrate that VI_PID‐K provides a more stable disciplined clock, improves the speed of skew convergence, and reduces Allan variance in a large time scale when compared to PI method or Fixed_Integral method.VI_PID‐K can improve the stability of slave clock and reduce the frequency that master clock sends Sync messages, so the network overhead for clock synchronization can be reduced. Copyright © 2013 John Wiley & Sons, Ltd.
Single and Multiple Additions of Dibenzoylmethane onto Buckminsterfullerene
Authors: Giovannitti Alexander , Seifermann Stefan M. , Bihlmeier Angela , Muller Thierry , Topic Filip , Rissanen Kari , Nieger Martin , Klopper Wim , Bräse Stefan 
Published: November 2013

AbstractA novel dibenzoylmethane‐fullerene e,e,e‐tris adduct was synthesized by the application of a variation of the Bingel–Hirsch conditions and characterized among others by X‐ray crystallography. In addition, the corresponding hexakis adduct was detected by MALDI‐TOF‐MS analysis. Its existence was supported by density‐functional‐theory (DFT) computations. Furthermore a new synthesis of bis(benzoyl)methanofullerene was established, and its molecular structure was elucidated by X‐ray crystallography. DFT computations reproduced the experimentally determined conformation and predict a low energy barrier for the rotation of the two benzoyl moieties.
A live‐attenuated pneumococcal vaccine elicits CD4+T‐cell dependent class switching and provides serotype independent protection against acute otitis media
Authors: Rosch Jason W , Iverson Amy R , Humann Jessica , Mann Beth , Gao Geli , Vogel Peter , Mina Michael , Murrah Kyle A , Perez Antonia C , Edward Swords W , Tuomanen Elaine I , McCullers Jonathan A 
Published: November 2013

AbstractAcute otitis media (AOM) caused by Streptococcus pneumoniae remains one of the most common infectious diseases worldwide despite widespread vaccination. A major limitation of the currently licensed pneumococcal vaccines is the lack of efficacy against mucosal disease manifestations such as AOM, acute bacterial sinusitis and pneumonia. We sought to generate a novel class of live vaccines that (1) retain all major antigenic virulence proteins yet are fully attenuated and (2) protect against otitis media. A live vaccine candidate based on deletion of the signal recognition pathway component ftsY induced potent, serotype‐independent protection against otitis media, sinusitis, pneumonia and invasive pneumococcal disease. Protection was maintained in animals coinfected with influenza virus, but was lost if mice were depleted of CD4+ T cells at the time of vaccination. The live vaccine induced a strong serum IgG2a and IgG2b response that correlated with CD4+ T‐cell mediated class switching. Deletion of genes required for microbial adaptation to the host environment is a novel live attenuated vaccine strategy yielding the first experimental vaccine effective against pneumococcal otitis media.