bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Synthesis and Applications of Angular Acyl‐Substituted Azulenones: Formal Synthesis of (.+‐.)‐Acorenol and Facile Access to the Hydroazulene Core of Pseudolaric Acid.
Authors: Yue Xiao‐Dong , Chen Li , Li Wei‐Dong Z. 
Published: January 2015

AbstractAcyl substituted azulenones (IV) and (IX) are prepared by sequential reaction of arylacetophenones with acetylenes (II) and methanol.
ChemInform Abstract: Steroids from the Cold Water Starfish Ctenodiscus crispatus with Cytotoxic and Apoptotic Effects on Human Hepatocellular Carcinoma and Glioblastoma Cells.
Authors: Quang Tran Hong , Lee Dong‐Sung , Han Se Jong , Kim Il Chan , Yim Joung Han , Kim Youn‐Chul , Oh Hyuncheol 
Published: January 2015

AbstractFive known steroids, including three sulfated steroids, are isolated from the cold water starfish C.
ChemInform Abstract: An Unusual Wittig Reaction with Sugar Derivatives: Exclusive Formation of a 4‐Deoxy Analogue of α‐Galactosyl Ceramide.
Authors: Sawant Ratnnadeep C. , Lih Yu‐Hsuan , Yang Shih‐An , Yeh Chun‐Hong , Tai Hung‐Ju , Huang Chung‐Li , Lin Hua‐Shuan , Badsara Satpal Singh , Luo Shun‐Yuan 
Published: January 2015

AbstractThe method is applied to the synthesis of the α‐galaytosyl ceramide analogue (V).
ChemInform Abstract: Enantioselective Organocatalytic Michael/Aldol Sequence: Anticancer Natural Product (+)‐trans‐Dihydrolycoricidine.
Authors: McNulty James , Zepeda‐Velazquez Carlos 
Published: January 2015

AbstractStarting with an organocatalyzed Michael/aldol reaction sequence of the cinnamic aldehyde (I) with α‐azidoacetone a nine‐step total synthesis of the anticancer natural product (IV) is developed.
ChemInform Abstract: Phenylglycol Metabolites from Cultures of the Basidiomycete Mycena pruinosoviscida BCC 22723.
Authors: Isaka Masahiko , Chinthanom Panida , Sappan Malipan , Supothina Sumalee , Boonpratuang Thitiya 
Published: January 2015

Abstractisolation, structure elucidation, and absolute configuration of mycenadiols A‐D
ChemInform Abstract: New Isocoumarins from a Cold‐Adapted Fungal Strain Mucor sp. and Their Developmental Toxicity to Zebrafish Embryos.
Authors: Feng Chun‐Chi , Chen Guo‐Dong , Zhao Yan‐Qiu , Xin Sheng‐Chang , Li Song , Tang Jin‐Shan , Li Xiao‐Xia , Hu Dan , Liu Xing‐Zhong , Gao Hao 
Published: January 2015

AbstractThree new isocoumarin derivatives, mucorisocoumarins A‐C, are isolated along with seven known compounds.
ChemInform Abstract: Zinc Oxide. From Dilute Magnetic Doping to Spin Transport
Authors: Opel Matthias , Goennenwein Sebastian T. B. , Althammer Matthias , Nielsen Karl‐Wilhelm , Karrer‐Mueller Eva‐Maria , Bauer Sebastian , Senn Konrad , Schwark Christoph , Weier Christian , Guentherodt Gernot , et al. et al. 
Published: January 2015

AbstractReview: 99 refs.
ChemInform Abstract: Food Wastes Conversion to Products for Use in Chemical and Environmental Technology, Material Science and Agriculture
Authors: Montoneri Enzo , Prevot Alessandra Bianco , Avetta Paola , Arques Antonio , Carlos Luciano , Magnacca Giuliana , Laurenti Enzo , Tabasso Silvia 
Published: January 2015

AbstractReview: 108 refs.
Clinical outcome in patients with peripherally‐sited atypical lipomatous tumours and dedifferentiated liposarcoma
Authors: Kalimuthu Sangeetha N , Tilley Charles , Forbes Georgina , Ye Hongtao , Lehovsky Katie , Pillay Nischalan , Seddon Beatrice M , O'Donnell Paul , Pollock Robin , Tirabosco Roberto , Amary M Fernanda , Flanagan Adrienne M. 
Published: January 2015

AbstractThe reported incidence of local recurrence of peripheral atypical lipomatous tumours is highly variable and is likely to reflect the different inclusion criteria of cases, and the design of previous studies. We aimed to study the incidence of local recurrence of 90 cases of atypical lipomatous tumours and an additional 18 cases of de novo dedifferentiated liposarcoma. All tumours were diagnosed on the basis of MDM2 amplification: all patients had their first treatment in the same specialist sarcoma unit and were followed for a minimum of 60 months. The tumours were diagnosed between 1997 and 2009 and followed until the end of 2014. Seventy cases (78%) of atypical lipomatous tumours were located in the thigh (mean size 195 mm on presentation). Eight atypical lipomatous tumours (8.9%) recurred locally, of which 50% recurred after 60 months. The only two tumours with intralesional excisions recurred. Seven of the eight recurrent tumours were detected by the patient by self‐examination. One case recurred a second time as a dedifferentiated liposarcoma. Seventeen per cent of the de novo dedifferentiated liposarcomas recurred within 60 months of presentation. Extending the study period revealed that atypical lipomatous tumour could recur up to 40 years after the first surgery. Furthermore, of 26 tumours that recurred in the extended study, 27% recurred more than once, and three of the seven that recurred more than once transformed into a dedifferentiated liposarcoma. We recommend that, following post‐operative wound care, patients with atypical lipomatous tumour are referred back to their general practitioner for follow up, but that in the event of a suspected recurrence they have rapid access back to the specialist unit using a ‘supported discharge’ scheme. In the event of an intralesional excision and if a lesion recurs, patients are followed in a specialist unit at regular intervals: whether MRI scanning is a valuable means of monitoring such patients is unclear and requires an evidence base
Cytomorphologic features that distinguish schwannoma from other low‐grade spindle cell lesions
Authors: Chebib Ivan , Hornicek Francis J. , Nielsen G. Petur , Deshpande Vikram 
Published: January 2015

BACKGROUNDFine‐needle aspiration biopsy of spindled mesenchymal lesions, including schwannomas, are challenging because of overlapping cytomorphological features. The objective of the current study was to identify key diagnostic cytological criteria for the diagnosis of schwannoma and to distinguish it from its common mimics.METHODSA total of 58 schwannomas were evaluated and compared with 98 benign and low‐grade spindle cell lesions, including 17 gastrointestinal stromal tumors and 20 fibromatosis cases. Biopsy confirmation was available for all cases. The authors semiquantitatively evaluated cellularity, quality of stroma (fibrous and fibrillar), the presence of single cells with bipolar cytoplasmic processes, and marked nuclear pleomorphism (in the absence of other features of malignancy). Nuclear features evaluated included fishhook‐type nuclei, intranuclear inclusions, chromatin pattern, and nucleoli.RESULTSSchwannomas demonstrated cohesive tissue fragments with fibrillary and occasionally fibrous stroma. The presence of intranuclear inclusions and marked nuclear pleomorphism and the absence of single cells with bipolar cytoplasmic processes emerged as statistically significant differences between the schwannoma and the nonschwannoma groups. When 5 criteria were present (high numbers of clusters, few to no single cells, fibrillary stroma, nuclei with pointed tips, and anisonucleosis) the sensitivity, specificity, positive predictive value, and negative predictive value for the diagnosis of schwannoma were 22%, 97%, 81%, and 68%, respectively.CONCLUSIONSCohesive tissue fragments with fibrillary/fibrous stroma, intranuclear inclusions, marked nuclear pleomorphism, and the absence of spindled cells with bipolar cytoplasmic processes are strongly suggestive of schwannoma and assist in excluding potential mimics. Cancer (Cancer Cytopathol) 2015. © 2015 American Cancer Society. Cancer (Cancer Cytopathol) 2015;123:171–179. © 2014 American Cancer Society.
ZnO‐Coated Carbon Nanotubes: Inter‐Diffusion of Carboxyl Groups and Enhanced Photocurrent Generation
Authors: Hung Chia‐I , Wen Hua‐Chiang , Lai Yao‐Cheng , Chang Shih‐Hsin , Chou Wu‐Ching , Hsu Wen‐Kuang 
Published: January 2015

AbstractZnO is a defect‐governed oxide and emits light at both visible and UV regimes. This work employs atomic layer deposition to produce oxide particles on oxygenated carbon nanotubes, and the composites only show emission profiles at short wavelengths. The quenching of defect‐related emissions at long wavelengths is verified, owing to carboxyl diffusion into oxygen vacancies, and doping is supported by ZnCO3 formation in oxide lattice. Fully coated tubes display an increased photocurrent and the quantum efficiency increases by 22 % relative to the bare nanotubes.
A Simple Quantitative Method to Study Protein–Lipopolysaccharide Interactions by Using Liquid Crystals
Authors: Das Dibyendu , Sidiq Sumyra , Pal Santanu Kumar 
Published: January 2015

AbstractThe interaction of proteins with endotoxins has divergent effects on lipopolysaccharide (LPS)‐induced responses, which serve as a basis for many clinical and therapeutic applications. It is, therefore, important to understand these interactions from both theoretical and practical points of view. This paper advances the design of liquid crystal (LC)‐based stimuli‐responsive soft materials for quantitative measurements of LPS–protein binding events through interfacial ordering transition. Micrometer‐thick films of LCs undergo easily visualized ordering transitions in response to proteins at LPS–aqueous interfaces of the LCs. The optical response of the LC changes from dark to bright after aqueous solutions of hemoglobin (Hb), bovine serum albumin (BSA), and lysozyme proteins (LZM) are in contact with a LPS‐laden aqueous–LC interface. The effects of interactions of different proteins with LPS are also observed to cause the response of the LC to vary significantly from one to another; this indicates that manipulation of the protein–LPS binding affinity can provide the basis for a general, facile method to tune the LPS‐induced responses of the LCs to interfacial phenomena. By measuring the optical retardation of the 4′‐pentyl‐4‐cyanobiphenyl (5CB) LC, the binding affinity of the proteins (Hb, BSA, and LZM) towards LPS that leads to different orientational behavior at the aqueous interfaces of the LCs can be determined. The interaction of proteins with the LPS‐laden monolayer is highest for LPS–Hb, followed by LPS–BSA, and least for LPS–LZM; this is in correlation with their increasing order of binding constants (LPS‐Hb>LPS‐BSA>LPS‐LZM). The results presented herein pave the way for quantitative and multiplexed measurements of LPS–protein binding events and reveal the potential of the LC system to be used as quantitative LC‐based, stimuli‐responsive soft materials.
Fabrication of Hybrid Organic–Inorganic Materials with Tunable Porosity for Catalytic Application
Authors: Opanasenko Maksym V. , Montanari Erica , Shamzhy Mariya V. 
Published: January 2015

AbstractNovel layered organic–inorganic materials functionalized with amino groups have been synthesized by using a two‐dimensional zeolitic precursor, IPC‐1P, prepared by a top‐down approach from zeolite UTL. The formation of porous materials containing silsesquioxane linkers covalently bonded to zeolite layers in the interlayer space was confirmed by a variety of characterization techniques (N2 sorption, XRD, TEM). The textural properties and catalytic behavior of functionalized hybrid materials synthesized by direct pillaring of IPC‐1P or by grafting of (3‐aminopropyl)silyl groups to the IPC‐1P precursor preliminarily pillared with tetraethoxysilane (TEOS) were compared. The use of a mixture of aminosilsesquioxanes and TEOS for pillaring of IPC‐1P led to the formation of functionalized materials, which are characterized by excellent textural properties (SBET=154–435 m2 g−1, Vtotal=0.336–0.630 cm3 g−1) and provide a 100 % yield of target benzylidenemalononitrile in the Knoevenagel condensation of benzaldehyde and malononitrile.
Catalytic Partial Oxidation Coupled with Membrane Purification to Improve Resource and Energy Efficiency in Syngas Production
Authors: Iaquaniello G. , Salladini A. , Palo E. , Centi G. 
Published: January 2015

AbstractCatalytic partial oxidation coupled with membrane purification is a new process scheme to improve resource and energy efficiency in a well‐established and large scale‐process like syngas production. Experimentation in a semi industrial‐scale unit (20 Nm3 h−1 production) shows that a novel syngas production scheme based on a pre‐reforming stage followed by a membrane for hydrogen separation, a catalytic partial oxidation step, and a further step of syngas purification by membrane allows the oxygen‐to‐carbon ratio to be decreased while maintaining levels of feed conversion. For a total feed conversion of 40 %, for example, the integrated novel architecture reduces oxygen consumption by over 50 %, with thus a corresponding improvement in resource efficiency and an improved energy efficiency and economics, these factors largely depending on the air separation stage used to produce pure oxygen.
Oxalate Oxidase Model Studies – Substrate Reactivity
Authors: Pawlak Piotr L. , Panda Manashi , Li Jia , Banerjee Atanu , Averill Derek J. , Nikolovski Borislava , Shay Brian J. , Brennessel William W. , Chavez Ferman A. 
Published: January 2015

AbstractThe synthesis and structure of [MnLCl]0.5H2O (1·0.5H2O, HL = 1‐benzyl‐4‐acetato‐1,4,7‐triazacyclononane) is reported. Complex 1 exists as a coordination polymer in the solid state, and the MnII center is bonded to three amine nitrogen atoms, one carboxylate oxygen atom, a chlorido ligand, and an adjacent carboxylate group in a chelating fashion to afford a seven‐coordinate center. The dissolution of 1 in acetonitrile containing excess oxalate (ox) ions results in a monomeric species. When mixtures of 1 and oxalate ions are exposed to oxygen under ambient conditions, a dark pink EPR‐silent species is generated. The pink species is believed to be [MnIII(ox)2]–, which results from the displacement of the ligand L– by an oxalate ion. The decomposition of this species ultimately results in the formation of 1 equiv. of CO2 per oxalate ion consumed, a HCO3– ion, and a MnII species. Further reaction of the resulting MnII species with excess oxalate in the presence of oxygen leads to additional oxalate degradation.
pH‐Specific Halide‐Dependent Materials from ZrIV/Hydroxycarboxylic Acid/Aromatic Chelator Reactivity: Architecture–Lattice Dimensionality and Spectroscopic Fingerprint Relations
Authors: Halevas Eleftherios , Karamelidou Asimenia , Hatzidimitriou Antonios , Mateescu Constantin , Salifoglou Athanasios 
Published: January 2015

AbstractThe chemical reactivity of binary and ternary ZrIV/hydroxycarboxylic acid/(N,N‐aromatic chelator) systems (hydroxycarboxylic acid = citric, malic acid; N,N‐aromatic chelator = 1,10‐phenanthroline) has been investigated in a pH‐specific manner, giving rise to the new binary and ternary crystalline materials [Zr2F6(C6H4O7)2](CH6N3)6·H2O (1), [Zr2F6(C4H3O5)2](NH4)4·3H2O (2), [Zr2(C4H3O5)2(C4H4O5)2(C4H5O5)2](CH6N3)4·4.5H2O (3), and [Zr2(C4H3O5)2(C4H4O5)2(C4H5O5)2](C12H8N2)(C12H9N2)2(CH6N3)2·6H2O (4). Compounds 1–4 were characterized by elemental analysis, FTIR spectroscopy, TGA, 13C‐CPMAS, 19F‐DPMAS, and 1H CRAMPS NMR spectroscopy, and X‐ray crystallography. The structures of 1–4 reveal the influence of fluoride in the starting ZrIV reagents on the identity of the Zr2O2‐containing dinuclear assemblies in the arisen 3D architectures. The uniquely defined spectroscopic data, including the NMR data, corroborate the X‐ray structures of 1–4 and reflect the contribution of the intra/intermolecular interactions to the structural speciation of the investigated systems. Collectively, the work 1) depicts the factors that determine the nature and properties of the emerging synthetic materials in the investigated systems, 2) formulates structural architecture–lattice dimensionality and spectroscopic fingerprint correlations, and 3) projects the framework through which new ZrIV materials with defined physicochemical properties can arise at the binary and ternary level.
Luminescence Enhancement of Lu3TaO7:Eu3+@Lu3TaO7 Red‐Emitting Nanophosphors
Authors: Zhang Yuan , Feng Wenchun , Huang Keke , Yuan Long , Du Yanyan , Wu Xiaofeng , Feng Shouhua 
Published: January 2015

AbstractA series of red‐emitting homogeneous Lu3TaO7:Eu3+@Lu3TaO7 (core‐shell) nanoparticles have been successfully synthesised for applications in white‐light‐emitting diodes (WLEDs). The shell‐core ratio (SR) was modulated by the amount of core and shell material which gives a depiction of the effect of SR on luminescence intensity. Powder X‐ray diffraction data indicate that the core‐shell structures of the nanoparticles are homogeneous in the Fm$\bar {3}$m space group. X‐ray photoelectron spectroscopy results provide evidence of the core‐shell architecture with obvious decreasing amounts of Eu3+ on the surface with an increase in the thickness of the shell. Transmission electron microscopy results showed that by coating the Lu3TaO7 shell on the surface of the Lu3TaO7:Eu3+ core, the particle size increased corresponding to the addition of shell material. The photoluminescence lifetime decays increased and this gives additional evidence of the core‐shell structure. Furthermore, the best emission intensity was obtained with a relative optimum shell‐core ratio (1/8), showing an increase of 31.5 % compared with the bare core material.
An Effective Two‐Emulsion Approach to the Synthesis of Doped ZnS Crystalline Nanostructures
Authors: Dolcet Paolo , Maurizio Chiara , Casarin Maurizio , Pandolfo Luciano , Gialanella Stefano , Badocco Denis , Pastore Paolo , Speghini Adolfo , Gross Silvia 
Published: January 2015

AbstractThe controlled, room‐temperature synthesis of M‐doped (M = CuII, MnII, SmIII, GdIII, or TbII) ZnS nanostructures (with an average crystallite size of 5–10 nm) in the confined space of miniemulsion droplets is reported herein and discussed. The adopted synthetic route is a colloidal method, ideally suited to easily achieve small particle size and narrow size distribution. The synthesized functional nanostructures crystallize in the sphalerite lattice, as determined by powder X‐ray diffraction. In addition to structural characterization, several complementary techniques, such as X‐ray photoelectron spectroscopy, thermogravimetric analysis, differential scanning calorimetry, micro‐Raman spectroscopy, inductively coupled plasma mass spectrometry, and Fourier transform infrared spectroscopy were used to determine chemical and physical properties as well as the microstructural features of our products. As far as the morphological aspects of the obtained samples are concerned, they were studied by means of scanning and transmission electron microscopies. Finally, the local structure around dopant ions was unravelled by means of X‐ray absorption spectroscopy, in particular through extended X‐ray absorption fine structure measurements carried out at the Zn, S, and dopant K or L3 edges. This information has been complemented with the investigation of the photoluminescence properties.
Structure, Thermal Behavior, and Vibrational Spectroscopy of the Silver Borate AgB3O5
Authors: Sohr Gerhard , Falkowski Viktoria , Schauperl Michael , Liedl Klaus R. , Huppertz Hubert 
Published: January 2015

AbstractThe new silver borate AgB3O5 was obtained under high‐pressure, high‐temperature conditions at 3 GPa and 600 °C in a Walker‐type multianvil device. The compound crystallizes with four formula units (Z = 4) in the unit cell in the orthorhombic space group Pna21 (no. 33). The lattice parameters are a = 1029.7(2), b = 832.2(2), c = 390.00(8) pm, and V = 0.3342(2) nm3. The new non‐centrosymmetric structure is built up from planar BO3 groups and BO4 tetrahedra, which are interconnected by two‐ and threefold‐coordinated oxygen atoms. In the channels down the c axis, the silver ions are 4+4‐fold coordinated by oxygen ions. In addition to the collection of a single‐crystal X‐ray diffraction data set, ambient‐ and high‐temperature X‐ray powder diffraction experiments as well as IR and Raman spectroscopy were performed. The vibrational spectra were interpreted though calculations of the harmonic vibrational frequencies at the Γ point.
Developing Pathways to the Synthesis of Low‐Valence Molybdenum Methoxides: Preparation, Characterization, and Redox Chemistry of Dimeric and Tetrameric Molybdenum Alkoxide Clusters
Authors: Kuznetsov Denis A. , Fedyanin Ivan V. , Komarova Natal'ya S. , Shilov Gennady V. , Martynenko Vyacheslav M. , Vasil'ev Sergey G. , Krivenko Alexander G. , Lyssenko Konstantin A. , Bazhenova Tamara A. 
Published: January 2015

AbstractThe rare Mo=Mo double‐bonded dimeric alkoxide complex [Mo2Cl4(OCH3)4(CH3OH)2] (1) was prepared by the simple methanolysis reaction of [MoCl4(CH3CN)2]. It was shown that the dissolution of 1 in thf results in the formation of the [Mo2O2Cl4(OCH3)2(thf)2] (2) and [Mo2Cl4(OCH3)4(thf)2] (3) dimers. A novel tetranuclear 10e molybdenum cluster [Mo4Cl4O2(OCH3)6(CH3OH)4] (4) was synthesized by the spontaneous disproportionation of 1 in methanol. An alternative pathway to 4 based on the redox reaction of Mo3+ and Mo5+ compounds {in the form of [MoCl3(thf)3] and [Mo2Cl4(OCH3)6] (5), respectively} was proposed and realized. The redox behavior of 4 was investigated by means of cyclic voltammetry. It was demonstrated that 4 may undergo a reversible two‐electron reduction process, which implies the retention of the {Mo4} core, whereas the oxidation is irreversible, proceeding apparently with the destruction of the tetranuclear cluster core.
First Practical and Efficient Synthesis of 3‐Phosphorylated β‐Carboline Derivatives Using the Pictet–Spengler Reaction
Authors: Viveros‐Ceballos José Luis , Sayago Francisco J. , Cativiela Carlos , Ordóñez Mario 
Published: January 2015

AbstractWe report here the first practical and efficient synthesis of the diethyl 1,2,3,4‐tetrahydro‐β‐carboline‐3‐phosphonates 3 and 4 as well as diethyl 9H‐β‐carboline‐3‐phosphonates 5 and 6. The target compounds were prepared in good yields by application of the Pictet–Spengler reaction of easily obtainable phosphotryptophan diethyl ester 7. The procedure is based on simple preparation of racemic 7 followed by a Pictet–Spengler reaction with several aldehydes and subsequent oxidation chemistry.
Friedel–Crafts Arylation of α‐Hydroxy Ketones: Synthesis of 1,2,2,2‐Tetraarylethanones
Authors: Kumar Anil , Singh Tej V. , Thomas Sajesh P. , Venugopalan Paloth 
Published: January 2015

AbstractFriedel–Crafts arylation of α‐hydroxy ketones such as 2‐hydroxy‐1,2,2‐triarylethanones has been achieved with a variety of arenes and heteroarenes in the presence of Lewis or Brønsted acids. Both sterically hindered and unhindered 1,2,2,2‐tetrarylethanones are formed in good to excellent yields by using a stoichiometric amount of triflic acid. The intermediacy of an α‐keto carbenium ion has been proposed.
Regio‐ and Stereoselective Synthesis of Vicinal (Z)‐Dihaloalkenylsilanes from Silyl Ethynylarenes
Authors: Yauchi Yuta , Ide Masataka , Shiogai Ryo , Chikugo Takuya , Iwasawa Tetsuo 
Published: January 2015

AbstractThe direct access to (Z)‐(1‐bromo‐2‐chloro‐2‐arylvinyl)triisopropylsilane through formal addition of BrCl to triisopropylsilyl ethynylarene was explored. BrCl was generated in situ from commercially available TMSCl and N‐bromosuccinimide. This simple protocol enabled highly efficient regio‐ and stereoselective bromochlorination, bis‐bromination, and bis‐chlorination of the triple bond on a gram scale in the syn mode. It thus provided a potentially diverse scaffold for adaptable preparation of differently all‐carbon tetrasubstituted olefins.
Synthesis of Pyridylphosphonates by Rhodium‐Catalyzed [2+2+2] Cycloaddition of 1,6‐ and 1,7‐Diynes with Diethyl Phosphorocyanidate
Authors: Kashima Kenichi , Ishii Masahiro , Tanaka Ken 
Published: January 2015

AbstractThe convenient and atom‐economical synthesis of substituted bicyclic pyridylphosphonates has been achieved by the cationic rhodium(I)/H8‐binap‐complex‐catalyzed [2+2+2] cycloaddition of 1,6‐ and 1,7‐diynes with diethyl phosphorocyanidate. These reactions may proceed via an azarhodacyclopentadiene intermediate in addition to the rhodacyclopentadiene intermediate.