bluuebunny/crossref_metadata_2025_split huggingface dataset:
Palladium‐Catalyzed Regioselective Diarylation of o‐Carboranes By Direct Cage B−H Activation
Authors: Quan Yangjian , Xie Zuowei 
Published: October 2015

AbstractPalladium‐catalyzed intermolecular coupling of o‐carborane with aromatics by direct cage B−H bond activation has been achieved, leading to the synthesis of a series of cage B(4,5)‐diarylated‐o‐carboranes in high yields with excellent regioselectivity. Traceless directing group ‐COOH plays a crucial role for site‐ and di‐selectivity of such intermolecular coupling reaction. A PdII–PdIV–PdII catalytic cycle is proposed to be responsible for the stepwise arylation.
Asymmetric Dearomatization of β‐Naphthols through a Bifunctional‐Thiourea‐Catalyzed Michael Reaction
Authors: Wang Shou‐Guo , Liu Xi‐Jia , Zhao Qun‐Chao , Zheng Chao , Wang Shao‐Bo , You Shu‐Li 
Published: October 2015

AbstractAn intermolecular asymmetric dearomatization reaction of β‐naphthols with nitroethylene through a chiral‐thiourea‐catalyzed Michael reaction is described. Enantioenriched functionalized β‐naphthalenones with an all‐carbon quaternary stereogenic center could thus be easily constructed from simple naphthol derivatives in good yields and excellent enantioselectivity (up to 79 % yield, 98 % ee).
Structure and properties of a low viscosity acrylate based flexible epoxy resin
Authors: Yang Yuan , Zhao Yun-Feng , Wang Jian-Yue , Zhao Chuan , Tong Liu , Liu Xiao-Yan , Zhang Ji-Hua , Zhan Mao-Sheng 
Published: October 2015

ABSTRACTA series of low viscosity acrylate‐based epoxy resin (AE)/glycol diglycidyl ether (GDE) systems were prepared. The effect of GDE and low molecular weight polyamide (LPA) content on the rheological behavior, phase structure, damping, and mechanical properties were studied by differential scanning calorimeter (DSC), viscometer, scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA), and electro mechanical machine. The viscosity of the uncured AE systems decreased significantly after the incorporation of GDE. The damping properties were found to decrease slightly with the increasing GDE and LPA content. The tensile strength of the cured AE/GDE samples enhanced significantly after the incorporation of GDE with at least 150% improvement for all the samples while it decreased slightly with increasing LPA content. The AE/GDE cured systems were intended for future use as structural damping materials. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42959.
Depletion of neural stem cells from the subventricular zone of adult mouse brain using cytosine b‐Arabinofuranoside
Authors: Ghanbari Amir , Esmaeilpour Tahereh , Bahmanpour Soghra , Golmohammadi Mohammad Ghasem , Sharififar Sharareh , Azari Hassan 
Published: October 2015

AbstractIntroductionNeural stem cells (NSCs) reside along the ventricular axis of the mammalian brain. They divide infrequently to maintain themselves and the down‐stream progenitors. Due to the quiescent property of NSCs, attempts to deplete these cells using antimitotic agents such as cytosine b‐Aarabinofuranoside (Ara‐C) have not been successful. We hypothesized that implementing infusion gaps in Ara‐C kill paradigms would recruit the quiescent NSCs and subsequently eliminate them from their niches in the subventricular zone (SVZ).MethodsWe infused the right lateral ventricle of adult mice brain with 2% Ara‐C using four different paradigms—1: one week; 2: two weeks; 3, 4: two weeks with an infusion gap of 6 and 12 h on day 7. Neurosphere assay (NSA), neural colony‐forming cell assay (N‐CFCA) and immunofluorescent staining were used to assess depletion of NSCs from the SVZ.ResultsNeurosphere formation dramatically decreased in all paradigms immediately after Ara‐C infusion. Reduction in neurosphere formation was more pronounced in the 3rd and 4th paradigms. Interestingly 1 week after Ara‐C infusion, neurosphere formation recovered toward control values implying the presence of NSCs in the harvested SVZ tissue. Unexpectedly, N‐CFCA in the 3rd paradigm, as one of the most effective paradigms, did not result in formation of NSC‐derived colonies (colonies >2 mm) even from SVZs harvested 1 week after completion of Ara‐C infusion. However, formation of big colonies with serial passaging capability, again confirmed the presence of NSCs.ConclusionsOverall, these data suggest Ara‐C kill paradigms with infusion gaps deplete NSCs in the SVZ more efficiently but the niches would repopulate even after the most vigorous kill paradigm used in this study.
Filter Press Performance for Fast‐Filtering Compressible Suspensions
Authors: Stickland Anthony D. , Irvin Elizabeth H. , Skinner Samuel J. , Scales Peter J. , Hawkey Andrew , Kaswalder Francesco 
Published: October 2015

AbstractIn some batch filtration processes, highly permeable suspensions dewater fast compared to the rest of the process. Here, the impact of fast‐filtering compressible materials on the throughput of fixed‐chamber filter presses is explored. The dewatering properties for a compressible yet highly permeable minerals processing slurry are used as inputs to a filter press model to explore the effects of operating and design parameters. For fast‐filtering materials, maximum throughput is achieved with wide cavities and minimal handling time, while membrane resistance can be significant. Pressure affects the maximum achievable concentration, as given by the strength of the material. Overall, this work demonstrates the combined use of material characterization and device modeling for filter press optimization.
Measuring Oxygen Solubility in Micelles
Authors: Nissim Rita , Batchelor‐McAuley Christopher , Compton Richard G. 
Published: October 2015

AbstractA novel electrochemical method has been developed for the determination of the oxygen solubility in cetyltrimethylammonium bromide (CTAB) micelles. The electroreduction of oxygen is studied in aqueous phosphate buffer solutions, using a microelectrode. The addition of micelle‐forming surfactants to solutions pre‐saturated with oxygen leads to a reduction of the oxygen signal, allowing the oxygen uptake by the micelles to be measured. For CTAB micelles, an oxygen concentration of 6.7±0.72 mm was observed, which was shown to remain constant with increasing CTAB concentration in the bulk solution. The method has general applicability.
Triarylboron‐Linked Conjugated Microporous Polymers: Sensing and Removal of Fluoride Ions
Authors: Li Zhongping , Li He , Xia Hong , Ding Xuesong , Luo Xiaolong , Liu Xiaoming , Mu Ying 
Published: October 2015

AbstractA luminescent conjugated microporous polymer (BCMP‐3) has been synthesized in high yield by a carbon–carbon coupling reaction using triarylboron as a building unit. BCMP‐3 was fully characterized by using powder X‐ray diffraction analysis, Fourier transform infrared spectroscopy, 13C solid‐state NMR spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, and nitrogen and carbon dioxide adsorption. The new three‐dimensional conjugated framework possess a high Brunauer–Emmett–Teller (BET) specific surface area up to 950 m2 g−1 with a pore volume of 0.768 cm3 g−1, good stability, and abundant boron sites in the skeleton. Under excited‐light irradiation, BCMP‐3 exhibits strong fluorescent emission at 488 nm with a high absolute quantum yield of 18 % in the solid state. Polymer BCMP‐3 acts as a colorimetric and fluorescent chemosensor with high sensitivity and selectivity for F− over other common anions. In addition, the polymer also works as an adsorbent for F− removal and shows good adsorption capacities of up to 24 mg g−1 at equilibrium F− concentrations of 16 mg L−1 and a temperature of 298 K. The adsorption kinetics and isotherm were analyzed by fitting experimental data with pseudo‐second‐order kinetics and Langmuir equations. Furthermore, we highlight that BCMP‐3 is an adsorbent for fluoride removal that can be efficiently reused many times without loss of adsorption efficiency.
Photosensitized Thymine Dimerization via Delocalized Triplet Excited States
Authors: Miro Paula , Lhiaubet‐Vallet Virginie , Marin M. Luisa , Miranda Miguel A. 
Published: October 2015

AbstractA new mechanism of photosensitized formation of thymine (Thy) dimers is proposed, which involves generation of a delocalized triplet excited state as the key step. This is supported by chemical evidence obtained by combining one benzophenone and two Thy units with different degrees of freedom, whereby the photoreactivity is switched from a clean Paternò–Büchi reaction to a fully chemo‐, regio‐, and stereoselective [2+2] cycloaddition.
Effects of Coke Deposits on the Catalytic Performance of Large Zeolite H‐ZSM‐5 Crystals during Alcohol‐to‐Hydrocarbon Reactions as Investigated by a Combination of Optical Spectroscopy and Microscopy
Authors: Nordvang Emily C. , Borodina Elena , Ruiz‐Martínez Javier , Fehrmann Rasmus , Weckhuysen Bert M. 
Published: October 2015

AbstractThe catalytic activity of large zeolite H‐ZSM‐5 crystals in methanol (MTO) and ethanol‐to‐olefins (ETO) conversions was investigated and, using operando UV/Vis measurements, the catalytic activity and deactivation was correlated with the formation of coke. These findings were related to in situ single crystal UV/Vis and confocal fluorescence micro‐spectroscopy, allowing the observation of the spatiotemporal formation of intermediates and coke species during the MTO and ETO conversions. It was observed that rapid deactivation at elevated temperatures was due to the fast formation of aromatics at the periphery of the H‐ZSM‐5 crystals, which are transformed into more poly‐aromatic coke species at the external surface, preventing the diffusion of reactants and products into and out of the H‐ZSM‐5 crystal. Furthermore, we were able to correlate the operando UV/Vis spectroscopy results observed during catalytic testing with the single crystal in situ results.
Heterometallic Fe2II–UV and Ni2II–UV Exchange‐Coupled Single‐Molecule Magnets: Effect of the 3 d Ion on the Magnetic Properties
Authors: Chatelain Lucile , Pécaut Jacques , Tuna Floriana , Mazzanti Marinella 
Published: October 2015

AbstractUranium‐based compounds have been put forward as ideal candidates for the design of single‐molecule magnets (SMMs) with improved properties, but to date, only two examples of exchange‐coupled 3d–5f SMM containing uranium have been reported and both are based on the MnII ion. Here we have synthesized the first examples of exchange‐coupled uranium SMMs based on FeII and NiII. The SMM behavior of these complexes containing a quasi linear {MOUOM} core arises from intramolecular FeU and NiU exchange interactions combined with the high Ising anisotropy of the uranyl(V) moiety. The measured values of the relaxation barrier (53.9±0.9 K in the UFe2 complex and of 27.4±0.5 K in the UNi2 complex) show clearly the dependency on the spin value of the transition metal, providing important new information for the future design of improved uranium‐based SMMs.
ChemInform Abstract: (CaO)(FeSe): A Layered Wide‐Gap Oxychalcogenide Semiconductor.
Authors: Han Fei , Wang Di , Malliakas Christos D. , Sturza Mihai , Chung Duck Young , Wan Xiangang , Kanatzidis Mercouri G. 
Published: October 2015

AbstractThe new title compound is synthesized in low yield from a stoichiometric mixture of CaO and FeSe (alumina crucible, 1000 °C, 10 h) and characterized by single crystal XRD, SEM, optical spectroscopy, resistivity measurements, and DFT band structure calculations.
ChemInform Abstract: CaCl2, Bisoxazoline, and Malonate: A Protocol for an Asymmetric Michael Reaction.
Authors: Lippur Kristin , Kaabel Sandra , Jaerving Ivar , Rissanen Kari , Kanger Tonis 
Published: October 2015

AbstractIt is demonstrated, that a catalytic system composed of CaCl2 and a pyridine‐bisoxazoline ligand efficiently promotes the asymmetric Michael addition of α,β‐unsaturated ketones with dimethyl malonate.
ChemInform Abstract: Diversity‐Oriented Synthesis of β‐Lactams and γ‐Lactams by Post‐Ugi Nucleophilic Cyclization: Lewis Acids as Regioselective Switch.
Authors: Li Zhenghua , Sharma Upendra Kumar , Liu Zhen , Sharma Nandini , Harvey Jeremy N. , Van der Eycken Erik V. 
Published: October 2015

AbstractHeterocyclic fused α‐methylene β‐lactams are synthesized by a InCl3‐catalyzed intramolecular addition reaction.
ChemInform Abstract: Palladium‐Catalyzed Oxirane‐Opening Reaction with Arenes via C—H Bond Activation.
Authors: Wang Zhen , Kuninobu Yoichiro , Kanai Motomu 
Published: October 2015

AbstractThe scalable reaction has a broad substrate scope: Thus, arenes containing unsubstituted or substituted pyridine, quinolyl, amino or amide functionalities as the directing group are regioselectively functionalized at the sterically less hindered ortho‐position.
ChemInform Abstract: Ruthenium—Arene Catalysts Bearing N‐Heterocyclic Carbene Ligands for Olefin Cyclopropanation and Metathesis.
Authors: Meret Michael , Maj Anna M. , Demonceau Albert , Delaude Lionel 
Published: October 2015

AbstractRuthenium NHC‐catalysts of type (I) are found to be efficient catalysts for the cyclopropanation of activated olefins with diazoacetate (III).
ChemInform Abstract: Double‐Bond Isomerization: Highly Reactive Nickel Catalyst Applied in the Synthesis of the Pheromone (9Z,12Z)‐Tetradeca‐9,12‐dienyl Acetate.
Authors: Weber Felicia , Schmidt Anastasia , Roese Philipp , Fischer Michel , Burghaus Olaf , Hilt Gerhard 
Published: October 2015

AbstractThe reaction tolerates a wide range of functional groups susceptible to further transformations.
ChemInform Abstract: Fragment Coupling and the Construction of Quaternary Carbons Using Tertiary Radicals Generated From tert‐Alkyl N‐Phthalimidoyl Oxalates by Visible‐Light Photocatalysis.
Authors: Lackner Gregory L. , Quasdorf Kyle W. , Pratsch Gerald , Overman Larry E. 
Published: October 2015

AbstractThe starting oxalates are prepared following the synthesis of cyclohexane (III) which is used in most of the title reactions.
ChemInform Abstract: Pd—Pb Alloy Nanocrystals with Tailored Composition for Semihydrogenation: Taking Advantage of Catalyst Poisoning.
Authors: Niu Wenxin , Gao Yongjun , Zhang Weiqing , Yan Ning , Lu Xianmao 
Published: October 2015

AbstractA variety of Pd‐Pb alloy nanocrystals with adjustable shapes and compositions are synthesized and applied as model catalysts for the semihydrogenation of alkynes.
ChemInform Abstract: Ruthenium‐Catalyzed ortho Alkenylation of Aromatic Nitriles with Activated Alkenes via C—H Bond Activation.
Authors: Reddy Mallu Chenna , Jeganmohan Masilamani 
Published: October 2015

AbstractA series of mono‐alkenylated arenes is prepared by reaction of aromatic nitriles with acrylate esters.
ChemInform Abstract: An Efficient Mechanochemical Synthesis of Amides and Dipeptides Using 2,4,6‐Trichloro‐1,3,5‐triazine and PPh3.
Authors: Duangkamol Chuthamat , Jaita Subin , Wangngae Sirilak , Phakhodee Wong , Pattarawarapan Mookda 
Published: October 2015

AbstractA variety of carboxylic acids including aromatic acids, aliphatic acids, and N‐protected α‐amino acids (VI) undergo amidation to afford amides in moderate to excellent yields.
ChemInform Abstract: An Efficient and Practical Approach to Trifluoromethylthiolation of α‐Haloketones/α‐Haloarylmethanes.
Authors: Jiang Min , Zhu Fangxia , Xiang Haoyue , Xu Xing , Deng Lianfu , Yang Chunhao 
Published: October 2015

AbstractA simple method is elaborated for the trifluoromethylthiolation of bromides (I), (IV), and (VI) with AgS‐CF3 in the presence of potassium iodide.
ChemInform Abstract: Oxidative Olefination of Anilides with Unactivated Alkenes Catalyzed by an (Electron‐Deficient η5‐Cyclopentadienyl)Rhodium(III) Complex under Ambient Conditions.
Authors: Takahama Yuji , Shibata Yu , Tanaka Ken 
Published: October 2015

AbstractThe oxidative olefination of anilides with both activated and unactivated alkenes using an (electron‐deficient η5‐cyclopentadienyl)rhodium(III) complex leads to mono‐olefinated products (III) and (VI) as main products.
ChemInform Abstract: Practical Catalytic Method for Synthesis of Sterically Hindered Anilines.
Authors: Mailig Melrose , Rucker Richard P. , Lalic Gojko 
Published: October 2015

AbstractA broad range of aryl and hetarylboronic acid neopentylglycol esters bearing various functional groups are efficiently coupled with O‐benzoyl‐N,N‐dialkyl or N‐alkyl hydroxylamines, thus providing access to tertiary and secondary anilines, including sterically hindered ones.
ChemInform Abstract: A Highly Stereoselective Metal‐Free Hydrogenation of Diimines for the Synthesis of cis‐Vicinal Diamines.
Authors: Zhu Xiaxia , Du Haifeng 
Published: October 2015

AbstractPiers′ borane is used as catalyst for the synthesis of vicinal diamines.The reaction proceeds diastereoselectively and only a single isomer is obtained (no d.e.‐values given).
ChemInform Abstract: Mild Mn(OAc)3‐Mediated Aerobic Oxidative Decarboxylative Coupling of Arylboronic Acids and Arylpropiolic Acids: Direct Access to Diaryl 1,2‐Diketones.
Authors: Lv Wen‐Xin , Zeng Yao‐Fu , Zhang Shang‐Shi , Li Qingjiang , Wang Honggen 
Published: October 2015

AbstractLabeling experiments show that both oxygen atoms of the 1,2‐diketone originate from air.
ChemInform Abstract: Palladium‐Catalyzed Enantioselective Three‐Component Synthesis of α‐Substituted Amines.
Authors: Beisel Tamara , Manolikakes Georg 
Published: October 2015

AbstractThe first general synthesis of the title compounds from sulfonamides, aldehydes, and arylboronic acids utilizing a single catalytic system with easily accessible BOX‐ligand is reported.
ChemInform Abstract: Iodine‐Promoted Decarboxylative C—S Cross‐Coupling of Cinnamic Acids with Sodium Benzene Sulfinates
Authors: Chen Jie , Mao Jincheng , Zheng Yang , Liu Defu , Rong Guangwei , Yan Hong , Zhang Cheng , Shi Daqing 
Published: October 2015

Abstractaffording vinyl sulfones under metal‐free reaction conditions
ChemInform Abstract: Catalyst‐Controlled Regiodivergent C—H Borylation of Multifunctionalized Heteroarenes by Using Iridium Complexes.
Authors: Sasaki Ikuo , Taguchi Jumpei , Hiraki Shotaro , Ito Hajime , Ishiyama Tatsuo 
Published: October 2015

AbstractA variety of 2,5‐disubstituted furans, thiophenes, and pyrroles are subjected to the title reaction.
ChemInform Abstract: Synthesis of Chiral (Indol‐2‐yl)methanamines and Insight into the Stereochemistry Protecting Effects of the 9‐Phenyl‐9‐fluorenyl Protecting Group.
Authors: Lood Christopher S. , Laine Aino E. , Hoegnaesbacka Antonia , Nieger Martin , Koskinen Ari M. P. 
Published: October 2015

AbstractWhereas starting compound (III) is already known, an efficient approach to the analogous amino acid derivatives (I) and (V) is investigated to prepare them in a reasonable yield.
ChemInform Abstract: C—H Functionalization of Cyclic Amines: Redox‐Annulations with α,β‐Unsaturated Carbonyl Compounds.
Authors: Kang YoungKu , Richers Matthew T. , Sawicki Conrad H. , Seidel Daniel 
Published: October 2015

AbstractThe redox‐annulation of pyrrolidine (II) with unsaturated ketones (I) gives rise to fused pyrrolines (III), which are converted into pyrroles and pyrrolidines.
ChemInform Abstract: Sulfenylation of β‐Diketones Using C—H Functionalization Strategy.
Authors: Varun Begur Vasanthkumar , Gadde Karthik , Prabhu Kandikere Ramaiah 
Published: October 2015

AbstractThe scalable, mild, and metal‐free sulfenylation of 1,3‐dialkyl, 1,3‐diaryl, or 1,3‐alkylaryl substituted β‐diketones with various benzoxazole‐2‐thiones or benzothiazole‐2‐thiones proceeds without deacylation.
ChemInform Abstract: Regioselective Metal‐Free Cross‐Coupling of Quinoline N‐Oxides with Boronic Acids.
Authors: Bering Luis , Antonchick Andrey P. 
Published: October 2015

AbstractA novel and simple one‐step C—H bond functionalization of a wide range of quinoline N‐oxides to the corresponding 2‐substituted quinolines under external oxidant‐ and metal‐free conditions is developed.
ChemInform Abstract: Expedient Catalytic Construction of Azabicyclo[4.1.0]/[5.1.0] Carbaldehydes via Intramolecular Cyclopropanation.
Authors: Pan Xian‐Hua , Jiang Pan , Jia Zhi‐Hong , Xu Ke , Cao Jing , Chen Chang , Shen Mei‐Hua , Xu Hua‐Dong 
Published: October 2015

AbstractThree types of aza‐bicycles are conveniently constructed from the corresponding carbene progenitors of N‐allyl or N‐homoallyl triazoles.
ChemInform Abstract: New 3,4‐Secocycloartane and 3,4‐Secodammarane Triterpenes from the Ecuadorian Plant Coussarea macrophylla.
Authors: Gilardoni Gianluca , Chiriboga Ximena , Vita Finzi Paola , Vidari Giovanni 
Published: October 2015

AbstractThe isolation and structure determination of three new 3,4‐secodammarane triterpenes, macrocoussaric acids A‐C (I), and 3,4‐secocycloartane‐type triterpenoids, macrocoussaric acids D‐F (II), is described.
ChemInform Abstract: New Isoprenylated Phenolic Compounds from Morus laevigata.
Authors: Wang Meng , Yu Bang‐Wei , Yu Mei‐Hua , Gao Li‐Xin , Li Jing‐Ya , Wang He‐Yao , Li Jia , Hou Ai‐Jun 
Published: October 2015

AbstractTwo new isoprenylated flavonoids, laevigasins A (I) and B (II), and one new isoprenylated 2‐arylbenzofuran, laevigasin C (III), are isolated from the title species along with eight known compounds.
Investigation of impingement heat transfer for air‐sand mixture flow
Authors: Al‐Dulaimi Mustafa J. , Rasool Adnan A. Abdul , Hamad Faik A. 
Published: October 2015

AbstractHeat transfer between a heated flat plate and normal impinging gas‐solid two‐phase jet flow was investigated. A single jet from a nozzle of 10 mm diameter at nozzle‐to‐plate distance/nozzle diameter ratio in the range of 2–8 was used. Natural sand particles with average diameters of 220, 350, and 550 μm were used as a solid phase. The effects of particle size and loading ratio (mass of sand/mass of air) at different jet velocities on impingement cooling characteristics of the flat plate are investigated. The numerical simulations were performed with ANSYS Fluent 14.7 for a steady, three‐dimensional, incompressible turbulent flow using Eulerian simulation for the gas phase and Lagrangian simulation for sand particles. The experimental results show that the existence of sand particles decreases the Nusselt number compared to air jet flow. The single and two‐phase flow experimental results are close to predictions when the particle reflection option is used in the simulation. The discrepancy in local values near the stagnation point can be attributed to the complex nature of the two‐phase flow at the stagnation point that includes reflection of sand particles at different angles.
Interfacial Effects in PdAg Bimetallic Nanosheets for Selective Dehydrogenation of Formic Acid
Authors: Hu Chengyi , Mu Xiaoliang , Fan Jingmin , Ma Haibin , Zhao Xiaojing , Chen Guangxu , Zhou Zhiyou , Zheng Nanfeng 
Published: October 2015

AbstractTwo‐dimensional ultrathin PdAg bimetallic nanosheets are fabricated and used as model catalysts for understanding the synergetic effects in bimetallic nanocatalysts. The ultrathin nature of the nanosheets allows us to probe the electronic and geometric structures using XPS and X‐ray absorption spectroscopy. The as‐prepared bimetallic nanosheets show high catalytic activity for selective dehydrogenation of formic acid, especially when the Ag/Pd ratio reaches 1. The superior activity is attributed to the electronic and geometric effect generated from the Pd–Ag interfaces in the catalysts. Our studies reveal increased bond distances of Pd–Pd and decreased Ag–Ag bond lengths in the PdAg bimetallic nanosheets. Pd is electronically promoted by Ag to give enhanced catalysis. Moreover, the geometric effect generated from the PdAg alloyed surface enhances the catalysis by suppressing CO poisoning on the catalysts, which is confirmed by electrochemical FTIR measurements.