bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Co(III)(salen)‐Catalyzed Phenolic Kinetic Resolution of Two Stereocentered Benzyloxy and Azido Epoxides: Its Application in the Synthesis of ICI‐118,551, an anti‐Hypertensive Agent.
Authors: Karabal Pratibha U. , Kamble Dayanand A. , Sudalai Arumugam 
Published: August 2014

AbstractThe synthesis of anti‐alcohols (III) and syn‐alcohols (VI) is carried out by a phenolic kinetic resolution of corresponding epoxides (I) and (V) in the presence of a chiral cobalt salem catalyst.
ChemInform Abstract: Asymmetric Synthesis of Fluoroamines from Chiral Aziridines.
Authors: Park Hyeonjeong , Yoon Doo‐Ha , Ha Hyun‐Joon , Son Se In , Lee Won Koo 
Published: August 2014

AbstractRing opening of chiral aziridines (I) with Et3N·3HF gives both possible regioisomeric fluoroamines in ratios depending on the C‐2 substituent in the starting aziridine.
ChemInform Abstract: Catalyst‐Free Hydrogenation of Alkenes and Alkynes with Hydrazine in the Presence of Oxygen.
Authors: Menges Nurettin , Balci Metin 
Published: August 2014

AbstractA protocol for reduction of C‐C double and triple bonds is developed, which relies on the in situ generation of diimide from hydrazine hydrate by oxidation with oxygen.
ChemInform Abstract: Iron‐Catalyzed Oxidative Direct α‐C—H Bond Functionalization of Cyclic Ethers: Selective C—O Bond Formation in the Presence of a Labile Aldehyde Group.
Authors: Barve Balaji D. , Wu Yang‐Chang , El‐Shazly Mohamed , Korinek Michal , Cheng Yuan‐Bin , Wang Jeh‐Jeng , Chang Fang‐Rong 
Published: August 2014

AbstractA simple iron carbonyl catalyzed method for the α‐selective aryloxylation of cyclic ethers is developed using a variety of salicylic aldehydes as phenol derivative and tBuOOH as the oxidant.
ChemInform Abstract: Highly Efficient N‐Formylation of Amines with Ammonium Formate Catalyzed by Nano‐Fe3O4 in PEG‐400.
Authors: Wang Zhao‐gang , Lu Ming 
Published: August 2014

AbstractThe nano‐Fe3O4 catalyst can be reused 5 times without loss in yield and no increase in reaction time.
ChemInform Abstract: Base‐Free, One‐Pot Chemocatalytic Conversion of Glycerol to Methyl Lactate Using Supported Gold Catalysts.
Authors: Purushothaman Rajeesh Kumar P. , van Haveren Jacco , Melian‐Cabrera Ignacio , van Eck Ernst R. H. , Heeres Hero J. 
Published: August 2014

AbstractAu nanoparticles on ultra‐stable zeolite‐Y catalyzes the reaction of glycerol to methyl lactate in methanol.
ChemInform Abstract: Vortex Fluidic Promoted Diels—Alder Reactions in an Aqueous Medium.
Authors: Yasmin Lyzu , Stubbs Keith A. , Raston Colin L. 
Published: August 2014

AbstractThe reaction is performed in a vortex fluidic device (VFD), a thin film microfluidic platform, at a 45° tilt angle and 5000 rpm in the absence of a catalyst.
ChemInform Abstract: Copper‐Mediated Perfluoroalkylation of Heteroaryl Bromides with (phen)CuRF.
Authors: Mormino Michael G. , Fier Patrick S. , Hartwig John F. 
Published: August 2014

AbstractThe reaction with the phenanthroline‐ligated perfluoroalkyl copper reagents is applied to a wide range of heteroaromatic bromides.
ChemInform Abstract: Room‐Temperature Cu(II)‐Catalyzed Aromatic C—H Azidation for the Synthesis of ortho‐Azido Anilines with Excellent Regioselectivity.
Authors: Fan Yunpeng , Wan Wen , Ma Guobin , Gao Wei , Jiang Haizhen , Zhu Shizheng , Hao Jian 
Published: August 2014

AbstractCu(OAc)2 catalyzed aromatic C—H azidation with azidobenziodoxolone is described.
ChemInform Abstract: Preparation of One‐Carbon Homologated Amides from Aldehydes or Primary Alcohols.
Authors: Gupta Manoj K. , Li Zhexi , Snowden Timothy S. 
Published: August 2014

AbstractAn attempted transformation of (If‐h) with (VII) to the corresponding Weinreb amides fails due to formation of the N‐methylamides instead.
ChemInform Abstract: Orthogonal Reactivity of Acyl Azides in C—H Activation: Dichotomy Between C—C and C—N Amidations Based on Catalyst Systems.
Authors: Shin Kwangmin , Ryu Jaeyune , Chang Sukbok 
Published: August 2014

AbstractThe selective C‐C amidation is achieved with a rhodium based catalyst, whereas a ruthenium catalyst enables the C‐N amidation.
ChemInform Abstract: Stereoselective Synthesis of Z‐Acrylonitrile Derivatives: Catalytic and Acetylcholinesterase Inhibition Studies.
Authors: Parveen Mehtab , Malla Ali Mohammed , Alam Mahboob , Ahmad Musheer , Rafiq Shahnawaz 
Published: August 2014

AbstractA new and eco‐friendly synthetic approach to (Z)‐acrylonitriles via Knoevenagel reaction is described.
ChemInform Abstract: Indium Trichloride Catalyzed Domino Reactions of Isatin: A Facile Access to the Synthesis of Spiro(indoline‐3,4′‐pyrano[2,3‐c]pyrazol)‐2‐one Derivatives.
Authors: Poomathi Nataraj , Kamalraja Jayabal , Mayakrishnan Sivakalai , Muralidharan D. , Perumal Paramasivan T. 
Published: August 2014

AbstractThe regioselective domino one‐pot, three‐component reaction of isatins, pyrazoles, and an ethene derivative results in the formation of three new bonds in a single operation, presumably occurring via a domino Knoevenagel condensation/Michael addition/ intramolecular O‐cyclization sequence.
ChemInform Abstract: Catalyst‐Free System for Sulfenylation of Free (N—H) Indoles with 2,2′‐Dithiosalicylic Acid under Alkaline Conditions.
Authors: Zhou Xiaofei , Li Xinhua 
Published: August 2014

AbstractThe regioselective sulfenylation is performed in an eco‐friendly solvent system (iPrOH/H2O) under green, atmospheric conditions without a catalyst.
ChemInform Abstract: Pd/C‐Mediated Alkynylation of Indazoles: Synthesis and Pharmacological Evaluation of Mono‐ and Dialkynyl‐Substituted Indazoles.
Authors: Gorja D. R. , Shiva Kumar K. , Dulla B. , Mukkanti K. , Pal M. 
Published: August 2014

AbstractSome of the title compounds are screened for their in vitro cytotoxic activities against chronic myelogenous leukemia cell line.
ChemInform Abstract: 1,3‐Dipolar Cycloaddition Reactions of Indan‐1‐one Enamines Across Arylnitrile Oxides Leading to Novel Cyclic Isoxazoline Derivatives.
Authors: Jelizi Hanene , Wannassi Nadia , El Baker Rammah Mohamed , Ciamala Kabula , Knorr Michael , Rousselin Yoann , Kubicki Marek M. , Strohmann Carsten , Enescu Mironel 
Published: August 2014

AbstractA series of cyclic fused‐isoxazolines is obtained by regioselective and diastereoselective 1,3‐dipolar cycloaddition of enamines (I) and (IV) to arylnitrile oxides.
ChemInform Abstract: Tandem Ruthenium‐Catalyzed Transfer‐Hydrogenative Cyclization/Intramolecular Diels—Alder Reaction of Enediynes Affording Dihydrocoumarin‐Fused Polycycles.
Authors: Yamamoto Yoshihiko , Matsui Kazuma , Shibuya Masatoshi 
Published: August 2014

AbstractA new tandem process is developed comprising a transfer‐hydrogenative cyclization followed by intramolecular Diels—Alder reaction using a cationic Ru‐catalyst and Hantzsch ester as hydrogen source.
ChemInform Abstract: A New Method for the Facile Synthesis of Hydroxylated Flavones by Using Allyl Protection.
Authors: Nawghare B. R. , Sakate S. S. , Lokhande P. D. 
Published: August 2014

AbstractA simple and highly efficient method for the preparation of allyloxy‐ and related hydroxyflavones (18 examples in each case) via iodine‐induced cyclization of 2′‐hydroxy‐4‐allyloxychalcones (I) is developed.
ChemInform Abstract: Efficient C‐3 Reductive Alkylation of 4‐Hydroxycoumarin by Dehydrogenative Oxidation of Benzylic Alcohols Through Ruthenium Catalysis.
Authors: Montagut‐Romans A. , Boulven M. , Lemaire M. , Popowycz F. 
Published: August 2014

AbstractOnly benzylic alcohols react with 4‐hydroxycoumarin in the presence of Wilkinson′s catalyst.
ChemInform Abstract: Highly Functionalized Pyridines Synthesis from N‐Sulfonyl Ketimines and Alkynes Using the N—S Bond as an Internal Oxidant.
Authors: Zhang Qian‐Ru , Huang Ji‐Rong , Zhang Wei , Dong Lin 
Published: August 2014

AbstractCompound (XVI) results from alkene reduction of the intermediately formed 1‐phenylprop‐1‐en‐2‐ylpyridine.
ChemInform Abstract: Direct sp3 C—H Bond Arylation, Alkylation, and Amidation of Tetrahydroisoquinolines Mediated by Hypervalent Iodine(III) under Mild Conditions.
Authors: Muramatsu Wataru , Nakano Kimihiro , Li Chao‐Jun 
Published: August 2014

AbstractA series of 1‐substituted 1,2,3,4‐tetrahydroisoquinolines is prepared by oxidation of substrates (I) with bis(trifluoroacetoxy)iodobenzene followed by coupling of the intermediate iminium cation with a nucleophile, e.g. phthalimide, p‐toluenesulfonamide, or a Grignard reagent.
ChemInform Abstract: Pd‐Catalyzed Branching Cyclizations of Enediyne‐Imides Toward Furo[2,3‐b]pyridines.
Authors: Li Zexiang , Ling Fei , Cheng Dong , Ma Cheng 
Published: August 2014

AbstractA one‐step method for the construction of cross‐conjugated enediyne‐imides is presented as well as their Pd‐catalyzed reaction with allylic bromides to yield 3,5‐diallylfuropyridines (VI) and (VIII).
ChemInform Abstract: Visible Light Photocatalyzed Direct Conversion of Aryl‐/Heteroarylamines to Selenides at Room Temperature.
Authors: Kundu Debasish , Ahammed Sabir , Ranu Brindaban C. 
Published: August 2014

AbstractA general method for the conversion of a variety of anilines to selenides is achieved using an in situ formation of diazonium salts and photocatalytic reaction with diselenides using eosin Y as catalyst.
ChemInform Abstract: Synthesis and Structure—Activity Relationship Study of Cytotoxic Lupane‐Type 3β‐O‐Monodesmosidic Saponins with an Extended C‐28 Side Chain.
Authors: Cmoch Piotr , Korda Anna , Rarova Lucie , Oklestkova Jana , Strnad Miroslav , Luboradzki Roman , Pakulski Zbigniew 
Published: August 2014

AbstractSeveral of the compounds exhibit cyctoxicity against human cancer cell lines.
ChemInform Abstract: Sesquiterpenoids and Diterpenes from Chamaecyparis obtusa var. breviramea f. crippsii.
Authors: Xu Jian , Zeng Guang‐Zhi , Liu Yi‐Mei , Chen Ke‐Li , Sun Zhang‐Hua , Zhang Yu‐Mei , Tan Ning‐Hua 
Published: August 2014

AbstractFour new sesquiterpenoids (I)‐(III) are isolated from the branches and leaves of Chamaecyparis obtusa var.
ChemInform Abstract: Biomimetic Total Synthesis of (.+‐.)‐Doitunggarcinone A and (+)‐Garcibracteatone.
Authors: Pepper Henry P. , Tulip Stephen J. , Nakano Yuji , George Jonathan H. 
Published: August 2014

AbstractAdditionally to the first total syntheses of the target compounds several novel syntheses of monoterpene fragments are described.
ChemInform Abstract: Stereoselective Total Synthesis of Rhoiptelol B via Prins Cyclization.
Authors: Yadav Jhillu S. , Rahman Md. Ataur , Reddy N. Mallikarjuna , Prasad Attaluri R. , Al Khazim Al Ghamdi Ahmad 
Published: August 2014

AbstractA concise synthesis of title compound (I), a diarylheptanoid isolated from Rhoiptelea chiliantha, is achieved from a known homoallylic alcohol in 12 steps and 11% overall yield.
ChemInform Abstract: A Unified Stereodivergent Strategy for Prostaglandin and Isoprostanoid Synthesis.
Authors: Valli Matteo , Chiesa Francesco , Gandini Andrea , Porta Alessio , Vidari Giovanni , Zanoni Giuseppe 
Published: August 2014

AbstractStarting from compound (III) important key intermediates for prostaglandin and isoprostanoid syntheses are prepared.
ChemInform Abstract: Chemical Interaction at the Buried Silicon/Zinc Oxide Thin‐Film Solar Cell Interface as Revealed by Hard X‐Ray Photoelectron Spectroscopy
Authors: Wimmer M. , Gerlach D. , Wilks R. G. , Scherf S. , Felix R. , Lupulescu C. , Ruske F. , Schondelmaier G. , Lips K. , Huepkes J. , et al. et al. 
Published: August 2014

AbstractReview: 23 refs.
Numerical investigation on phytosanitary treatment of frozen wood using microwave energy
Authors: Erchiqui Fouad , Annasabi Zouheir , Koubaa Ahmed , Kocaefe Duygu , Slaoui‐Hasnaoui Fouad , Imad Abdellatif 
Published: August 2014

AbstractThis paper addresses issues in the microwave phytosanitary treatment of frozen wood. Four eastern Canadian wood species are used: trembling aspen, yellow birch, white birch, and sugar maple. The nonlinear heat conduction problem involving phase changes such as wood freezing is solved by a volumetric specific enthalpy‐based finite element method. Dielectric and thermophysical properties are functions of temperature and moisture content. As an application, we studied the dielectric heating of four wood species as a function of moisture content and microwave properties.
Non‐natural Acetogenin Analogues as Potent Trypanosoma brucei Inhibitors
Authors: Florence Gordon J. , Fraser Andrew L. , Gould Eoin R. , King Elizabeth F. B. , Menzies Stefanie K. , Morris Joanne C. , Tulloch Lindsay B. , Smith Terry K. 
Published: August 2014

AbstractNeglected tropical diseases remain a serious global health concern. Here, a series of novel bis‐tetrahydropyran 1,4‐triazole analogues based on the framework of chamuvarinin, a polyketide natural product isolated from the annonaceae plant species are detailed. The analogues synthesized display low micromolar trypanocidal activities towards both bloodstream and insect forms of Trypanosoma brucei, the causative agent of African sleeping sickness, also known as Human African Trypanosomiasis (HAT). A divergent synthetic strategy was adopted for the synthesis of the key tetrahydropyran intermediates to enable rapid access to diastereochemical variation either side of the 1,4‐triazole core. The resulting diastereomeric analogues displayed varying degrees of trypanocidal activity and selectivity in structure–activity relationship studies. Together, the biological potency and calculated lipophilicity values indicate that while there is room for improvement, these derivatives may represent a promising novel class of anti‐HAT agents.
End‐of‐life treatment preferences: A key to reducing ethnic/racial disparities in advance care planning?
Authors: Garrido Melissa M. , Harrington Shannon T. , Prigerson Holly G. 
Published: August 2014

BACKGROUNDThe objective of this study was to identify targets for interventions to reduce end‐of‐life care disparities among patients with advanced cancer. To do this, the authors evaluated the degree to which end‐of‐life care values and preferences are associated with advance care planning within racial/ethnic minority groups.METHODSThe Coping with Cancer study recruited patients with advanced cancer from outpatient clinics in 5 states from 2002 to 2008. Then, the rates of 1 type of advance care planning—do‐not‐resuscitate (DNR) orders—reported at baseline interviews by 606 patients were investigated. Bivariate tests determined associations among DNR order completion, religious values, and treatment preferences within racial/ethnic groups.RESULTSNon‐Latino white patients were significantly more likely to have a DNR order (45%) than black (25%) and Latino (20%) patients (P<.001). A preference against specific life‐prolonging treatment (eg, chemotherapy, ventilation) was the only factor significantly associated with higher DNR order likelihood in each group, with non‐Latino white patients more likely than Latino or black patients to express preferences against life‐prolonging care (eg, 26% of non‐Latino white patients, 46% of black patients, and 41% of Latino patients wanted a feeding tube if it would extend life for 1 more day; P<.001).CONCLUSIONSPreferences against life‐prolonging care differ dramatically by race/ethnicity, but they have a uniform significant association with DNR order completion rates across racial/ethnic groups of patients with advanced cancer. Advance care planning interventions that target preferences associated with DNR orders across racial/ethnic groups may reach a broad patient population and reduce end‐of‐life care disparities. Cancer 2014;120:3981–3986. © 2014 American Cancer Society.
Optimistic semaphores with non‐deterministic choice operation for heterogeneous manycore systems
Authors: Soriano‐Salvador Enrique , Muzquiz Gorka Guardiola , Ballesteros Francisco J. 
Published: August 2014

SummaryThe Nix operating system permits different roles to be assigned to the cores. One of the roles is to be able to run user‐space code with no interrupts from the operating system, which is particularly useful for high‐performance computing. System calls are especially expensive to a core playing this role. This paper presents a new implementation of optimistic semaphores that avoid performing expensive system calls in an uncontended scenario. The implementation is straightforward and somewhat unorthodox: a semaphore is based on a data structure and a lock that are shared between user space and kernel space. This study aims at evaluating if such an approach is viable. In addition, the implementation includes a non‐deterministic choice operation over a collection of semaphores, altsems. This novel operation facilitates the creation of higher‐level communication mechanisms, such as sockets and channels. To support this claim, we implemented a new kind of buffered communication channels named tubes, tailored for communicating processes running on different (heterogeneous) cores. The paper describes the implementation of the semaphores and the tubes, a comparative analysis of optimistic and non‐optimistic semaphores on Nix, and a comparative analysis of tubes and other kinds of communication channels that are available on the Nix operating system. Copyright © 2014 John Wiley & Sons, Ltd.
Naphtho[2,1‐b:3,4‐b′]dithiophene‐based Bulk Heterojunction Solar Cells: How Molecular Structure Influences Nanoscale Morphology and Photovoltaic Properties
Authors: Kim Yu Jin , Cheon Ye Rim , Back Jang Yeol , Kim Yun‐Hi , Chung Dae Sung , Park Chan Eon 
Published: August 2014

AbstractOrganic bulk heterojunction photovoltaic devices based on a series of three naphtho[2,1‐b:3,4‐b′]dithiophene (NDT) derivatives blended with phenyl‐C71‐butyric acid methyl ester were studied. These three derivatives, which have NDT units with various thiophene‐chain lengths, were employed as the donor polymers. The influence of their molecular structures on the correlation between their solar‐cell performances and their degree of crystallization was assessed. The grazing‐incidence angle X‐ray diffraction and atomic force microscopy results showed that the three derivatives exhibit three distinct nanoscale morphologies. We correlated these morphologies with the device physics by determining the J–V characteristics and the hole and electron mobilities of the devices. On the basis of our results, we propose new rules for the design of future generations of NDT‐based polymers for use in bulk heterojunction solar cells.
Type‐Dependent Identification of DNA Nucleobases by Using Diamondoids
Authors: Maier Frank C. , Fyta Maria 
Published: August 2014

AbstractThe possibility of distinguishing between DNA nucleobases of different sizes is manifested here through quantum‐mechanical simulations. By using derivatives of small, modified diamond clusters, known as diamondoids, it is possible to separate the pyrimidines (cytosine and thymine) from the larger purines (adenine and guanine), according to the collective electronic and binding properties of these DNA nucleobases and the diamondoid. The latter acts as a probe with which these properties can be examined in detail. Short single‐stranded DNA is built up from single nucleobases to reveal the effect of each DNA unit on the sensing abilities of the diamondoid probe. Several ways of orienting the nucleobases, nucleosides, nucleotides, and short single‐stranded DNA are investigated; these lead to quite different electronic properties and may or may not enhance the possibility of separating the DNA nucleobases. For the optimum orientation, that is, one that promotes stronger hydrogen bonding of the diamondoid to the short DNA strand, it is found that the electronic band gaps of a purine strand lie in a completely different range to the band gaps of a pyrimidine strand. This difference can be over 1 eV, which is measurable and shows the potential of using diamondoids and their derivatives in biosensing devices.
Modelling Ion‐Pair Geometries and Dynamics in a 1‐Ethyl‐1‐methylpyrrolidinium‐Based Ion‐Conductive Crystal
Authors: Chen Fangfang , Zhu Haijin , Forsyth Maria 
Published: August 2014

AbstractFull conformational and energy explorations are conducted on an organic ionic plastic crystal, 1‐ethyl‐1‐methylpyrrolidium tetrafluoroborate [C2mpyr][BF4]. The onsets of various stages of dynamic behaviour, which appear to account for low‐temperature solid–solid phase transitions, are investigated by using quantum‐chemical simulations. It is suggested that pseudorotation of the pyrrolidine ring occurs in the first instance; the partial rotation of the entire cation subsequently occurs and may be accompanied by reorientation of the ethyl chain as the temperature increases further. A cation–anion configuration, whereby BF4− interacts with the C2mpy cation from the side of the ring, is the most likely structure in the low‐temperature phase IV region. These interpretations are supported by 13C nuclear magnetic resonance chemical‐shift analysis.
Electrodeposition and Magnetic Characterization of Iron and Iron–Silicon Alloys from the Ionic Liquid 1‐Butyl‐1‐methylpyrrolidinium Trifluoromethylsulfonate
Authors: Giridhar Pulletikurthi , Weidenfeller Bernd , Zein El Abedin Sherif , Endres Frank 
Published: August 2014

AbstractThe electrodeposition of soft magnetic iron and iron–silicon alloys for magnetic measurements is presented. The preparation of these materials in 1‐butyl‐1‐methylpyrrolidinium trifluoromethylsulfonate, [Py1,4]TfO, at 100 °C with FeCl2 and FeCl2+SiCl4 was studied by using cyclic voltammetry. Constant‐potential electrolysis was carried out to deposit either Fe or FeSi, and deposits of approximately 10 μm thicknesses were obtained. By using scanning electron microscopy and X‐ray diffraction, the microstructure and crystallinity of the deposits were investigated. Grain sizes in the nanometer regime (50–80 nm) were found and the presence of iron–silicon alloys was verified. Frequency‐dependent magnetic polarizations, coercive forces, and power losses of some deposits were determined by using a digital hysteresis recorder. Corresponding to the small grain sizes, the coercive forces are around 950–1150 A m−1 and the power losses were at 6000 J m−3, which is much higher than in commercial Fe(3.2 wt %)Si electrical steel. Below a polarization of 1.8 T, the power losses are mainly caused by domain wall movements and, above 1.8 T, by rotation of magnetic moments as well as domain wall annihilation and recreation.
Supramolecular Interactions of Nonsteroidal Anti‐inflammatory Drug in Nanochannels of Molecular Containers: A Spectroscopic, Thermogravimetric and Microscopic Investigation
Authors: Maity Banibrata , Chatterjee Aninda , Ahmed Sayeed Ashique , Seth Debabrata 
Published: August 2014

AbstractSupramolecular host–guest complexation between the nonsteroidal anti‐inflammatory drug indomethacin (IMC) and molecular containers were investigated. The weakly fluorescent drug molecule becomes highly fluorescent on complexation with different molecular containers, and time‐resolved fluorescence emission spectroscopy reveals that the lifetime components of IMC significantly increase in the presence of molecular containers, compared with the lifetimes in neat water. The respective solid host–guest complexes were synthesised and characterised by Fourier transform infrared and 1H nuclear magnetic resonance spectroscopic analysis. Microscopy techniques were used to analyse modifications of the surface morphology, owing to the formation of supramolecular complexes. The effect of the molecular container on the optical properties of IMC has also been investigated to determine the effect of nanochannels of different size and structure.