bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Palladium‐Catalyzed Coupling of 3‐Halo‐Substituted Coumarins, Chromenes, and Quinolones with Various Nitrogen‐Containing Nucleophiles.
Authors: Soussi Mohamed Ali , Audisio Davide , Messaoudi Samir , Provot Olivier , Brion Jean‐Daniel , Alami Mouad 
Published: January 2012

AbstractA variety of 3‐halocoumarin, ‐quinolinone and ‐chromene derivatives smoothly undergoes coupling with a diversity of N‐nucleophiles like amides, sulfonamides, lactams, azoles, amines and amino acids.
ChemInform Abstract: Synthesis of 4H‐Chromene Derivatives by Reaction Between Alkyl Isocyanides and Dialkyl Acetylenedicarboxylate in the Presence of 6‐Hydroxyquinoline.
Authors: Mohtat Bita , Djahaniani Hoorieh , Yavari Issa , Dehbalaei Masomeh G. , Jam Saba A. 
Published: January 2012

AbstractThe addition of isocyanides to esters (III) generates a reactive intermediate which is trapped by 6‐quinolinol.
ChemInform Abstract: Stereoselective Synthesis of cis‐3,4‐Disubstituted Piperidines Through Ring Transformation of 2‐(2‐Mesyloxyethyl)azetidines.
Authors: Mollet Karen , Catak Saron , Waroquier Michel , Van Speybroeck Veronique , D'hooghe Matthias , De Kimpe Norbert 
Published: January 2012

AbstractTreatment of the azetidines (I) with nucleophiles allows a new and convenient access to the target compounds.
ChemInform Abstract: Palladium‐Catalyzed Direct ortho C—H Arylation of 2‐Arylpyridine Derivatives with Aryltrimethoxysilane.
Authors: Li Wu , Yin Zhangwei , Jiang Xiaoqing , Sun Peipei 
Published: January 2012

AbstractIt allows a new, convenient, and environmentally friendly access to various triaryls of type (III) and (V).
ChemInform Abstract: Discovery of Spiropiperidine‐Based Potent and Selective Orexin‐2 Receptor Antagonists.
Authors: Fujimoto Tatsuhiko , Tomata Yoshihide , Kunitomo Jun , Hirozane Mariko , Marui Shogo 
Published: January 2012

AbstractA spiropiperidine‐based scaffold is designed and a SAR study is carried out.
ChemInform Abstract: A New Four‐Component Reaction for the Synthesis of Spiro[4H‐indeno[1,2‐b]pyridine‐4,3′‐[3H]indoles].
Authors: Feiz Afsaneh , Shakibaei Ghazaleh Imani , Yasaei Zahra , Khavasi Hamid Reza , Bazgir Ayoob 
Published: January 2012

AbstractSynthesis of target compounds (IV) and (VI) is achieved using commercially available compounds.
ChemInform Abstract: Synthesis of Novel Thiazolyl‐Pyrimidines and Their Anticancer Activity in vitro.
Authors: Shi Hai‐Bo , Li Hai‐Bo , Lu Kong‐Qin , Zhu Xia‐Re , Hu Wei‐Xiao , Pei Wen 
Published: January 2012

AbstractSome of the novel title compounds (III) (37 examples) show moderate or high cytotoxic activity against human cancer cell lines.
ChemInform Abstract: An Oxidative Alkylamination of 1,3,7‐Triazapyrenes in the Aqueous Medium.
Authors: Borovlev Ivan , Demidov Oleg , Saigakova Nadezhda , Pisarenko Sergey , Nemykina Olesya 
Published: January 2012

AbstractThe applied reaction conditions can be regarded as green chemistry.
ChemInform Abstract: 1,4‐Diaryl‐7,10‐dimethoxyquinoxalino[2,3‐b]quinoxalines and Their Dihydro Derivatives: Redox Switching of NIR Absorption and Fluorescence.
Authors: Miura Youhei , Kawai Hidetoshi , Fujiwara Kenshu , Suzuki Takanori 
Published: January 2012

AbstractThe optical properties of the deeply colored dyes (VIII), which exhibit absorption bands extended to the NIR region, and (VII), which emit strong green fluorescence, are investigated in CH2Cl2.
ChemInform Abstract: Divergent Regioselective Synthesis of 2,5,6,7‐Tetrahydro‐1H‐1,4‐diazepin‐2‐ones and 5H‐1,4‐Benzodiazepines.
Authors: Attanasi Orazio A. , De Crescentini Lucia , Favi Gianfranco , Mantellini Fabio , Nicolini Simona 
Published: January 2012

AbstractCoupling of 1,2‐diaza‐1,3‐dienes with N‐unsubstituted 1,3‐diamines allows a new and easy access to the diazepinone skeleton.
ChemInform Abstract: Synthesis of Acylsilanes by Palladium‐Catalyzed Cross‐Coupling Reaction of Thiol Esters and Silylzinc Chlorides.
Authors: Azuma Hiroki , Okano Kentaro , Tokuyama Hidetoshi 
Published: January 2012

AbstractThiol esters (I), possessing a variety of functional groups, are converted to acylsilanes (III) in moderate to high yields by the title reaction using silylating reagent (II).
ChemInform Abstract: Catalytic and Direct Oxyphosphorylation of Alkenes with Dioxygen and H‐Phosphonates Leading to β‐Ketophosphonates.
Authors: Wei Wei , Ji Jian‐Xin 
Published: January 2012

AbstractThe reaction can be successfully carried out with styrenes, enamine (IIf) and dihydronaphthalene (VII).
ChemInform Abstract: Synthesis, Photophysical Properties of Tribranched Chromophores Based on 1,3,5‐Triazine Core and Different Electro‐Donating Eng‐Groups.
Authors: Liu Li , Huang Wei , Shi Jieping , Lue Changgui , Cui Yiping , Lu Guo‐Yuan 
Published: January 2012

AbstractAll four chromophores show strong fluorescence emission and are soluble in common organic solvents.
ChemInform Abstract: Antihepatitis B Virus and Cytotoxic Diterpenoids from Isodon lophanthoides var. gerardianus.
Authors: Pu Jian‐xin , Sun Han‐dong , et al. et al. 
Published: January 2012

Abstract4 New diterpenoids named isolophanthins A—D (I) and (II) are isolated from Isodon lophantoides var.
ChemInform Abstract: Flavusides A and B, Antibacterial Cerebrosides from the Marine‐Derived Fungus Aspergillus flavus.
Authors: Yang Guohua , Sandjo Louis , Yun Keumja , Leutou Alain Simplice , Kim Gun‐Do , Choi Hong Dae , Kang Jung Sook , Hong Jongki , Son Byeng Wha 
Published: January 2012

AbstractExtraction, isolation, and structure elucidation of title compounds (I) are described.
ChemInform Abstract: Coprismycins A and B, Neuroprotective Phenylpyridines from the Dung Beetle‐Associated Bacterium, Streptomyces sp.
Authors: Kim Seong‐Hwan , Ko Hyeonseok , Bang Hea‐Son , Park Seon‐Hui , Kim Dong‐Gyu , Kwon Hak Cheol , Kim Sun Yeou , Shin Jongheon , Oh Dong‐Chan 
Published: January 2012

AbstractThe new isomeric phenylpyridines (I) and (II), named coprismycins A and B, resp., are isolated along with four known dipyridines from a culture of Streptomyces sp., associated with an indigenous Korean dung beetle.
ChemInform Abstract: Microwave Assisted Synthesis of Fused Heterocyclic Compounds
Authors: Srinivasan Kumar V. , Chaskar Pratip K. , Dighe Satish N. , Rane Dhanashri S. , Khade Pranav V. , Jain Kishor S. 
Published: January 2012

AbstractReview: benzimidazoles, fused thiadiazoles, pyrimidoimidazoles, triazolotetrazines etc.; 85 refs.
ChemInform Abstract: Coordination Polymers and Metal Organic Frameworks Derived from 1,2,4‐Triazole Amino Acid Linkers
Authors: Naik Anil D. , Dirtu Marinela M. , Railliet Antoine P. , Marchand‐Brynaert Jacqueline , Garcia Yann 
Published: January 2012

AbstractReview: 120 refs.
ChemInform Abstract: Elucidating the Function of Complex‐Type Oligosaccharides by Use of Chemical Synthesis of Homogeneous Glycoproteins
Authors: Kajihara Yasuhiro , Izumi Masayuki , Hirano Kiriko , Murase Takefumi , MacMillan Derek , Okamoto Ryo 
Published: January 2012

AbstractReview: 56 refs.
8‐Substituted 3‐Arylcoumarins as Potent and Selective MAO‐B Inhibitors: Synthesis, Pharmacological Evaluation, and Docking Studies
Authors: Viña Dolores , Matos Maria J. , Ferino Giulio , Cadoni Enzo , Laguna Reyes , Borges Fernanda , Uriarte Eugenio , Santana Lourdes 
Published: January 2012

AbstractNeurodegenerative disorders are becoming more prevalent given the increase in the aging population. This has inspired active research in the development of new drugs that could mark an important advance in the treatment of complex diseases such as Alzheimer′s and Parkinson′s. With the aim of finding new MAO‐B‐selective inhibitors, we report the synthesis, in vitro evaluation, and docking simulation of a new series of 3‐arylcoumarins variously substituted at the 8‐position. Most of the studied compounds show high affinity and selectivity for the hMAO‐B isoform, with IC50 values in the low micro‐ to nanomolar range. Some of them have greater hMAO‐B inhibitory activity and selectivity than the reference compound, selegiline. Compounds 7 and 8 are the most active of this series, with compound 8 being fivefold more potent against MAO‐B and severalfold more selective than selegiline. Docking experiments were carried out with hMAO‐B crystal structures, providing new information about the enzyme–inhibitor interaction and the potential therapeutic application of the new 8‐substituted 3‐arylcoumarins.
Individual differences in human colour vision as derived from stiles & Burch 10° colour matching functions
Authors: Logvinenko Alexander D. 
Published: January 2012

AbstractIndividual differences between the 49 Stiles & Burch observers have been analyzed using the object‐colour space put forth recently (J of Vision 2009;9:1–23). A set of rectangular reflectance spectra has been used as a common frame of reference for representing object colours for all the observers. Being metameric to one of these rectangular reflectance spectra, every reflectance spectrum can be geometrically represented as a point in the three‐dimentional space. The interindividual differences reveal themselves in that, for various observers, the same reflectance spectrum maps to different points in this space. It has been found that on average such differences do not exceed the differences in object‐colour appearance induced by an illumination shift from daylight to the fluorescent daylight simulator F1. Such small individual variations have been accounted for by the fact that the cone spectral tuning curves have a special form that mitigates the individual differences in cone spectral positioning. © 2012 Wiley Periodicals, Inc. Col Res Appl, 2013
Isomerisation of CF2ClCH2Cl and CFCl2CH2F by Interchange of Cl and F Atoms with Analysis of the Unimolecular Reactions of Both Molecules
Authors: Solaka Sarah A. , Boshamer Sara E. , Parworth Caroline L. , Heard George L. , Setser D. W. , Holmes Bert E. 
Published: January 2012

AbstractThe recombination of CF2Cl with CH2Cl and CFCl2 with CH2F were employed to generate CF2ClCH2Cl* and CFCl2CH2F* molecules with 381 and 368 kJ mol−1, respectively, of vibrational energy in a room‐temperature bath gas. The unimolecular reactions of these molecules, which include HCl elimination, HF elimination, and isomerisation by interchange of chlorine and fluorine atoms, were characterized. The three rate constants for CFCl2CH2F were 2.9×107, 0.87×107 and 0.04×107 s−1 for HCl elimination, isomerisation and HF elimination, respectively. The isomerisation reaction must be included to have a complete characterization of the unimolecular kinetics of CFCl2CH2F. The rate constants for HCl elimination and HF elimination from CF2ClCH2Cl were 14×107and 0.37×107 s−1, respectively. Isomerisation that has a rate constant less than 0.08×107 s−1 is not important. These experimental rate constants were matched to calculated statistical rate constants to assign threshold energies, which are 264, 268, and 297 kJ mol−1, respectively, for isomerisation, HCl elimination, and HF elimination for CFCl2CH2F and 314, 251, and 289 kJ mol−1 in the same order for CF2ClCH2Cl. Density functional theory was used to evaluate the models that were needed for the statistical rate constants; the computational method was B3PW91/6‐31G(d′,p′). Threshold energies for the unimolecular reactions of CF2ClCH2Cl and CFCl2CH2F are compared to those for CF2ClCH3 and CFCl2CH3 to illustrate the elevation of threshold energies by F‐ or Cl‐atom substitution at the beta carbon atom (identified by CH). The DFT calculations systematically underestimate the threshold energy for HCl elimination.
X‐Ray Photoelectron Spectroscopy of Ferrocenyl‐ and Ferrocenium‐Based Ionic Liquids
Authors: Taylor Alasdair W. , Licence Peter 
Published: January 2012

AbstractX‐ray photoelectron spectroscopy (XPS) is used to study a series of five 1‐(ferrocenylmethyl)‐3‐methylimidazolium‐ and 1‐(ferroceniummethyl)‐3‐methylimidazolium‐based salts. All samples emit good photoelectron fluxes with sharp, well‐resolved photoelectron peaks. Due to the low volatility of imidazolium‐salts at ambient temperature, no modification of the XP spectrometer was required. Two of the salts exhibit supercooling behaviour, allowing XPS to be recorded at room temperature on liquid samples without the need for charge neutralisation. The photoelectron peaks can be assigned to the component atoms of the salts, based on previous studies on ferrocene, ferrocenium‐compounds and ionic liquids. Oxidation of the ferrocenyl moiety to ferrocenium shiftsthe Fe 2p and cyclopentadienyl C 1s photoelectron peaks to higher binding energy but does not affect the imidazolium and anion peaks. Under charge‐neutralisation conditions, in which the sample is flooded with low‐energy electrons, the ferrocenium moiety of the salt 1‐(ferroceniummethyl)‐3‐methylimidazolium di(hexafluorophosphate) is partially reduced.
Determination of LFER Descriptors of 30 Cations of Ionic Liquids—Progress in Understanding Their Molecular Interaction Potentials
Authors: Cho Chul‐Woong , Jungnickel Christian , Stolte Stefan , Preiss Ulrich , Arning Jürgen , Ranke Johannes , Krossing Ingo , Thöming Jorg 
Published: January 2012

AbstractIn order to understand molecular interaction potentials of 30 cations of ionic liquids (ILs), the well‐known linear free energy relationship concept (LFER) was applied. The LFER descriptors for the excess molar refractivity and the molar volume were calculated in silico and for hydrogen‐bonding acidity and basicity, and the polarizability/dipolarity of IL cations were experimentally determined through high performance liquid chromatography (HPLC) measurements. For the study, three different columns (RP‐select B, Cyan, and Diol) and buffered mobile phases, based on two organic solvents acetonitrile (ACN) and methanol (MeOH), were selectively combined to the HPLC separation systems RP‐select B‐ACN, RP‐select B‐MeOH, Cyan‐MeOH, Diol‐ACN, and Diol‐MeOH. By measuring the retention factors of 45 neutral calibration compounds and calculating LFER descriptors of three cations in the HPLC systems, the system parameters, including an ionic z coefficient, were determined. Conversely, the LFER descriptors of 30 ionic liquid cations were determined, based on the parameters of five systems and their retention factors in the HPLC systems. The results showed that the type of head group, alkyl chain length and further substituents of the cation have a significant influence on the dipolarity/polarizability and the hydrogen‐bonding acidity, and functionalized groups (hydroxyl, ether, and dimethylamino) lead to hydrogen‐bonding basicity of the cation. The characterization of cationic LFER descriptors opens up the chance for a more quantitative understanding of molecular interaction potentials and physicochemical properties of ILs.
Supramolecular Systems Based on Novel Mono‐ and Dicationic Pyrimidinic Amphiphiles and Oligonucleotides: A Self‐Organization and Complexation Study
Authors: Zakharova Lucia , Voronin Mikhail , Semenov Vyacheslav , Gabdrakhmanov Dinar , Syakaev Victor , Gogolev Yuri , Giniyatullin Rashit , Lukashenko Svetlana , Reznik Vladimir , Latypov Shamil , Konovalov Alexander , Zuev Yuri 
Published: January 2012

AbstractNovel mono‐ and dicationic pyrimidinic surfactants are synthesized and their aggregation behavior is studied by methods of tensiometry and nuclear magnetic resonance (NMR) self‐diffusion. To estimate their potentiality as gene delivery agents, the complexation with oligonucleotides (ONus) is explored by dynamic light scattering (DLS) and zeta‐potential titration methods and ethidium bromide exclusion experiments. Bola‐type pyrimidinic amphiphile (BPM) demonstrates rather a weak affinity to ONus. Although it induces mixed associations with ONus, only slight charge compensation changes occur at a large excess of bola, with no recharging reached. Similarly, the ethydium bromide exclusion study reveals a slow increase in the binding capacity toward an ONu with an increment in BPM concentration. The monocationic pyrimidinic surfactant (MPM) and its gemini analogue (GPM‐1) are ranked as intermediates in both their aggregative activity and complexing properties toward ONus. They both form mixed associates with ONus well below the critical micelle concentrations (cmcs) of 2 and 15 mM respectively. However, GPM‐1 has a much lower isoelectric point at the molar ratio surfactant/ONu r∼1 compared to r∼3 for MPM. This probably indicates a larger electrostatic contribution to the ONu complexation in the case of GPM‐1. The most hydrophobic pyrimidinic surfactant (GPM‐2), bearing three alkyl tails, demonstrates enhanced aggregative activity and binding capacity toward ONus as compared to former pyrimidinic surfactants. Due to effective aggregative (low cmc of 0.04 mM) plus binding properties (fraction of bound ONu β=0.76 at r=2.5), GPM‐2 may be ranked as a promising agent for wider biological applications.
Removing Polyvinylpyrrolidone from Catalytic Pt Nanoparticles without Modification of Superficial Order
Authors: Monzó J. , Koper M. T. M. , Rodriguez P. 
Published: January 2012

AbstractHerein, we report a simple methodology for cleaning Pt nanoparticles, prepared by a colloidal synthesis and coated with polyvinylpyrrolidone, without loss of crystalline surface structure. To prove the removal of the polyvinylpirrolidone from a Pt surface without disturbing the superficial order, a cleaning method using a solution of H2O2/H2SO4 was tested successfully for a Pt(111) single‐crystal electrode. The decontamination method was then tested for two different types of nanoparticles by mixing the suspension of nanoparticles with H2O2/H2SO4 and subsequent centrifugation. The resulting voltammetric profiles of platinum particles synthesized by the colloidal method employing PVP show a marked presence of the adsorption‐state characteristic of (111) ordered surface domains. The presence of the well‐ordered domains present on the surface of the nanoparticles was confirmed by using the irreversible adsorption of bismuth, tellurium and germanium.
The Persian Version of the Chronic Pain Acceptance Questionnaire
Authors: Mesgarian Fatemeh , Asghari Ali , Shaeiri Mohammad Reza , Broumand Akram 
Published: January 2012

Research on the role of acceptance in adjustment to persisting pain has been facilitated by the development of the Chronic Pain Acceptance Questionnaire (CPAQ). However, the CPAQ has not yet been validated amongst Iranian patients with chronic pain. To examine the psychometric properties of the Persian version of the CPAQ (P‐CPAQ), 245 Persian‐speaking chronic pain patients completed a battery of questionnaires, including: the P‐CPAQ, a Pain Self‐Efficacy Questionnaire, a slightly modified Roland and Morris Disability Questionnaire, the Catastrophizing Scale of the Coping Strategies Questionnaire, the Depression and Anxiety Scales of the Depression Anxiety And Stress Scale‐21 and the Pain‐Related Interference and Pain Intensity Scales of the Multidimensional Pain Inventory. Furthermore, to evaluate the reliability of the P‐CPAQ, the measure was completed by 24 chronic pain patients, on two occasions that are 2 weeks apart. The results of the principal component analysis and confirmatory factor analysis yielded a two‐factor solution. Furthermore, the reliability and construct validity of the P‐CPAQ were confirmed. In general, consistent with studies in other countries, the results of the present study indicate that pain acceptance plays an important role in adjustment to chronic pain regardless of cultural and language differences between countries. Copyright © 2012 John Wiley & Sons, Ltd.Key Practitioner MessageFindings obtained with P‐CPAQ provide support for the psychometric properties of the P‐CPAQ in an Iranian chronic pain population.The P‐CPAQ's psychometric strengths provide support for its use in both clinical and research settings.
A unified enhanced particle swarm optimization‐based virtual network embedding algorithm
Authors: Zhang Zhongbao , Cheng Xiang , Su Sen , Wang Yiwen , Shuang Kai , Luo Yan 
Published: January 2012

SUMMARYVirtual network (VN) embedding is a major challenge in network virtualization. In this paper, we aim to increase the acceptance ratio of VNs and the revenue of infrastructure providers by optimizing VN embedding costs. We first establish two models for VN embedding: an integer linear programming model for a substrate network that does not support path splitting and a mixed integer programming model when path splitting is supported. Then we propose a unified enhanced particle swarm optimization‐based VN embedding algorithm, called VNE‐UEPSO, to solve these two models irrespective of the support for path splitting. In VNE‐UEPSO, the parameters and operations of the particles are well redefined according to the VN embedding context. To reduce the time complexity of the link mapping stage, we use shortest path algorithm for link mapping when path splitting is unsupported and propose greedy k‐shortest paths algorithm for the other case. Furthermore, a large to large and small to small preferred node mapping strategy is proposed to achieve better convergence and load balance of the substrate network. The simulation results show that our algorithm significantly outperforms previous approaches in terms of the VN acceptance ratio and long‐term average revenue. Copyright © 2012 John Wiley & Sons, Ltd.
Ascitic fluid due to type II herpes simplex virus infection: Report of a case with immunocytochemical confirmation
Authors: Yoshida Keiko , Miyahira Yoshimitsu , Ishida Mitsuaki , Iwai Muneo , Kagotani Akiko , Arita Namie , Iwamoto Nozomi , Takikita Mikiko , Kojima Fumiyoshi , Okabe Hidetoshi 
Published: January 2012

AbstractHerpes simplex virus (HSV) infection is usually observed in the oral cavity and external genitals, and HSV peritonitis is extremely rare. Herein, we report a case of type II HSV peritonitis successfully diagnosed by ascitic cytology. A 66‐year‐old Japanese man, who had been treated with steroid inhalation for 5 years due to chronic obstructive pulmonary disease, was suspected to have acute cholecystitis. Laparoscopic cholecystectomy and intraoperative cytological examination of ascitic fluid were performed. Cytological study of ascitic fluid revealed that abundant granular cell debris, degenerative cells and apoptotic bodies were present, as well as some single or multinucleated cells with ground glass nuclei. However, vivid mesothelial cells were rarely seen. Immunocytochemical staining for type II HSV was positive in single or multinucleated cells with ground glass nuclei. Therefore, a diagnosis of type II HSV peritonitis was made. This is the first reported case of type II HSV peritonitis successfully diagnosed by ascitic cytology. This report highlights that the presence of abundant cell debris, degenerative cells and apoptotic bodies, and the absence of vivid mesothelial cells are the key cytological findings to suspect HSV peritonitis, and the diagnosis can be confirmed by careful surveillance for characteristic nuclear findings of single or multinucleated cells. The frequency of opportunistic infection is increased because of the increased numbers of iatrogenic immunocompromised patients as seen in this case, therefore, cytological examination is a useful method for early detection of the causative agent of peritonitis including HSV. Diagn. Cytopathol. 2013;41:354–359. © 2011 Wiley Periodicals, Inc.
Rhodium (Thiophosphinoyl)(trimethylsilyl)methanide and Bis(thiophosphinoyl)methanide Complexes: S~S vs. C~S Coordination
Authors: Heuclin Hadrien , Carenco Sophie , Le Goff Xavier‐Frédéric , Mézailles Nicolas 
Published: January 2012

AbstractA comparative study of the coordination modes of a (thiophosphinoyl)(trimethylsilyl)methanide (1–·Li+) and bis(thiophosphinoyl)methanide (2–·Li+) ligand with RhI was carried out. Several complexes were synthesized and characterized. For 1–·Li+, C~S coordination is forced, whereas for 2–·Li+, S~S and C~S coordination can be achieved. In one case, a dynamic equilibrium between these two modes of coordination was observed. DFT calculations were carried out to rationalize this phenomenon and the stability of the methanide compounds.