bluuebunny/crossref_metadata_2025_split huggingface dataset:
[Sb10Se10]2+, a Heteronuclear Polycyclic Polycation from a Room‐Temperature Ionic Liquid
Authors: Ahmed Ejaz , Isaeva Anna , Fiedler Andy , Haft Marcel , Ruck Michael 
Published: May 2011

AbstractReaction of antimony, selenium, and selenium(IV) chloride in the Lewis acidic ionic liquid [BMIM]Cl/AlCl3(BMIM: 1‐n‐butyl‐3‐methylimidazolium) at room temperature yielded air‐sensitive black block‐shaped crystals of [Sb10Se10][AlCl4]2. The triclinic unit cell (space group${P\bar 1}$,a=947.85(2),b=957.79(2),c=1166.31(3) pm;α=103.622(1),β=110.318(1),γ=99.868(1)°;Z=1) contains the first mixed antimony/selenium polycation, [Sb10Se10]2+. The centrosymmetric polycyclic cation consists of two realgar‐like [Sb4Se4] cages, which are connected through positively charged, three‐bonded selenium atoms with a central [Sb2Se2] ring. Quantum chemical calculations predict semiconducting behavior of the compound and indicate primarily covalent bonding with varying ionic contribution within the [Sb10Se10]2+polycation, while the interactions between the polycation and the [AlCl4]−anions are predominantly ionic. The applicability of the Zintl concept to the chemical bonding in the heteronuclear polycation was evaluated by a thorough quantum chemical analysis.
ChemInform Abstract: High‐Pressure High‐Temperature Synthesis and Crystal Structure of the Isotypic Rare Earth (RE)—Thioborate—Sulfides RE9[BS3]2 [BS4]3S3, (RE: Dy—Lu).
Authors: Borna Marija , Hunger Jens , Ormeci Alim , Zahn Dirk , Burkhardt Ulrich , Carrillo‐Cabrera Wilder , Cardoso‐Gil Raul , Kniep Ruediger 
Published: May 2011

AbstractThe title compounds are prepared by high temperature/high pressure reactions of mixtures of the elements in the molar ratio RE:B:S = 1:3:6 (3.5 GPa, 1673 K, 5 h).
ChemInform Abstract: Hydrothermal Syntheses and Structures of the Uranyl Tellurates AgUO2(HTeO5) and Pb2UO2(TeO6).
Authors: Ling Jie , Ward Matthew , Burns Peter C. 
Published: May 2011

AbstractThe title compounds are hydrothermally synthesized in low yields from mixtures of UO2(NO3)2, H6TeO6, and AgNO3 or Pb(NO3)2 (H2O, autoclave, 220 °C, 9 d).
ChemInform Abstract: Synthesis, Structure and Properties of Several New Oxychalcogenide Materials with the General Formula A2O2M2OSe2 (A: La—Sm, M: Fe, Mn).
Authors: Free David G. , Withers Neil D. , Hickey Peter J. , Evans John S. O. 
Published: May 2011

AbstractThe title compounds are prepared from mixtures of the rare earth metal oxides, Fe or Mn, and Se (alumina crucible, 1000 °C, 12 h).
ChemInform Abstract: The New Ternary Silicide Gd5CoSi2: Structural, Magnetic and Magnetocaloric Properties.
Authors: Mayer Charlotte , Gaudin Etienne , Gorsse Stephane , Chevalier Bernard 
Published: May 2011

AbstractThe new title compound is synthesized by arc melting of stoichiometric mixtures of the elements followed by annealing at 1003 K for one month.
ChemInform Abstract: Selective Synthesis of gem‐Chlorofluorinated Nitrogen‐Containing Derivatives after Superelectrophilic Activation in Superacid HF/SbF5.
Authors: Liu Fei , Martin‐Mingot Agnes , Jouannetaud Marie‐Paule , Bachmann Christian , Frapper Gilles , Zunino Fabien , Thibaudeau Sebastien 
Published: May 2011

AbstractTreatment of chlorinated allylic amines like (I) and (IV) with HF and 3.8mol% SbF5 allows direct formation of gem‐chlorofluorinated nitrogen‐containing compounds.
ChemInform Abstract: Enantioselective Palladium‐Catalyzed Carbozincation of Cyclopropenes.
Authors: Kraemer Katja , Leong Paul , Lautens Mark 
Published: May 2011

AbstractTreatment of cyclopropenes with ZnEt2 and subsequent trapping with electrophiles allows a new, diastereo‐, and enantioselective access to functionalized cyclopropanes.
ChemInform Abstract: An Unusual Reaction of Propargylamines with CH2I2 and Et3Al
Authors: Ramazanov I. R. , Yaroslavova A. V. , Khalilov L. M. , Dzhemilev U. M. , Nefedov O. M. 
Published: May 2011

Abstractformation of cyclopropane or bis‐cyclopropane derivatives depending on the reaction time
ChemInform Abstract: Synthesis of Highly Enantioenriched C‐Tertiary Amines from Boronic Esters: Application to the Synthesis of Igmesine.
Authors: Bagutski Viktor , Elford Tim G. , Aggarwal Varinder K. 
Published: May 2011

AbstractTertiary boronic esters are converted into tertiary alkylamines with high enantioselectivities.
ChemInform Abstract: Enantioselective Hydrocyanation of Aldehydes Catalyzed by [Li{Ru(phgly)2(binap)}]X (X: Cl, Br).
Authors: Kurono Nobuhito , Yoshikawa Tatsuya , Yamasaki Mikio , Ohkuma Takeshi 
Published: May 2011

AbstractThe Ru complexes (I) are found to be highly efficient catalysts for the asymmetric hydrocyanation of aromatic, α,β‐unsaturated, and tert‐alkyl aldehydes.
ChemInform Abstract: An Efficient Protocol for the Palladium‐Catalyzed Suzuki—Miyaura Cross‐Coupling.
Authors: Marziale Alexander N. , Jantke Dominik , Faul Stefan H. , Reiner Thomas , Herdtweck Eberhardt , Eppinger Joerg 
Published: May 2011

AbstractAn environmentally friendly protocol for the title reaction is presented.
ChemInform Abstract: Palladium(II)‐Catalyzed C—H Bond Arylation of Electron‐Deficient Arenes at Room Temperature.
Authors: Tredwell Matthew J. , Gulias Moises , Gaunt Bremeyer Nadine , Johansson Carin C. C. , Collins Beatrice S. L. , Gaunt Matthew J. 
Published: May 2011

AbstractVarious benzaldimines are arylated under mild reaction conditions using aryl trifluoroborates.
ChemInform Abstract: Mg‐Promoted Facile and Selective Intramolecular Cyclization of Aromatic δ‐Ketoesters.
Authors: Miyazaki Takeshi , Maekawa Hirofumi , Yonemura Kazuaki , Yamamoto Yoshimasa , Yamanaka Yoshiko , Nishiguchi Ikuzo 
Published: May 2011

AbstractTitle reaction provides facile access towards α‐aryl‐α‐hydroxycycloalkanones.
ChemInform Abstract: ZrOCl2·8H2O‐Catalyzed Solvent‐Free Synthesis of Isobenzofuran‐1(3H)‐ones.
Authors: Sangshetti Jaiprakash N. , Ansari Siddique Akber M. K. , Shinde Devanad B. 
Published: May 2011

AbstractThe synthesis via ZrOCl2‐catalyzed condensation of acid (I) with ketones offers several advantages such as high yields, easy handling, and short reaction times.
ChemInform Abstract: Enantioselective Friedel—Crafts Alkylation of Thiophenes with Ethyl Glyoxylate: Easy Access to Chiral Secondary Alcohols.
Authors: Huang Zhong , Zhang Jingchang , Zhou Yuqiang , Wang Nai‐Xing 
Published: May 2011

AbstractAsymmetric Friedel—Crafts alkylation of 2‐substituted thiophenes with ethyl glyoxylate proceeds smoothly in the presence of an axially chiral Ti catalyst (up to 91% e.e.).
ChemInform Abstract: A Versatile and an Efficient Synthesis of 5‐Substituted‐1H‐tetrazoles
Authors: Gowd Madhusudana Reddy Muthukur Bhoje , Pasha Mohamed Afzal 
Published: May 2011

Abstract[via Zr‐catalyzed [3 + 2] cycloaddition of nitriles with NaN3].
ChemInform Abstract: α‐Fe2O3 Nanoparticles: An Efficient, Inexpensive Catalyst for the One‐Pot Preparation of 3,4‐Dihydropyrano[c]chromenes.
Authors: Nagabhushana H. , Saundalkar S. Sandeep , Muralidhar L. , Nagabhushana B. M. , Girija C. R. , Nagaraja D. , Pasha M. A. , Jayashankara V. P. 
Published: May 2011

AbstractOptimized reaction conditions allow the synthesis of title compounds (IV) via a three component reaction.
ChemInform Abstract: Microwave‐Assisted Solvent‐ and Ligand‐Free Copper‐Catalyzed Cross‐Coupling Between Halopyridines and Nitrogen Nucleophiles.
Authors: Liu Zhen‐Jiang , Vors Jean‐Pierre , Gesing Ernst R. F. , Bolm Carsten 
Published: May 2011

AbstractThe title reaction has the following reaction order: I<Br<Cl=F<OTf.
ChemInform Abstract: An Efficient One‐Pot Three‐Component Synthesis of New Isoxazolyl Polyhydroacridine‐1,8‐diones in an Ionic Liquid Medium.
Authors: Rajanarendar E. , Reddy M. Nagi , Shaik Firoz Pasha 
Published: May 2011

AbstractThe title compounds (IV) are obtained from dimedone, various aromatic aldehydes and isoxazolyl amine in the presence of an efficient recyclable ionic liquid.
ChemInform Abstract: Synthesis of H‐Pyrazolo[5,1‐a]isoquinolines via Copper(II)‐Catalyzed Oxidation of an Aliphatic C—H Bond of Tertiary Amine in Air.
Authors: Li Shaoyu , Wu Jie 
Published: May 2011

AbstractThe process involves a silver‐catalyzed intramolecular cyclization and a copper‐catalyzed oxidation of an aliphatic C—H bond in the tertiary amine (II).
ChemInform Abstract: Synthesis and Evaluation of Tumor Cell Growth Inhibition of Methyl 3‐Amino‐6‐[(hetero)arylethynyl]thieno[3,2‐b]pyridine‐2‐carboxylates. Structure—Activity Relationships, Effects on the Cell Cycle and Apoptosis.
Authors: Queiroz Maria‐Joao R. P. , Calhelha Ricardo C. , Vale‐Silva Luis A. , Pinto Eugenia , Almeida Gabriela M. , Vasconcelos M. Helena 
Published: May 2011

AbstractThe most active compounds in terms of apoptosis in the NCI‐H460 cell line are (IIIc)—(IIIe).
ChemInform Abstract: 3‐Benzylamino‐β‐carboline Derivatives Induce Apoptosis Through G2/M Arrest in Human Carcinoma Cells HeLa S‐3.
Authors: Ikeda Reiko , Iwaki Toshie , Iida Tomoko , Okabayashi Takasumi , Nishi Eishiro , Kurosawa Masaki , Sakai Norio , Konakahara Takeo 
Published: May 2011

AbstractA variety of β‐carboline derivatives (I) and (II) are synthesized and evaluated for their antitumor activity.
ChemInform Abstract: Synthesis and Structure—Activity Relationship of 2‐Thiopyrimidine‐4‐one Analogues as Antimicrobial and Anticancer Agents.
Authors: Prachayasittikul Supaluk , Worachartcheewan Apilak , Nantasenamat Chanin , Chinworrungsee Maneekarn , Sornsongkhram Nirun , Ruchirawat Somsak , Prachayasittikul Virapong 
Published: May 2011

AbstractTitle compounds (I) are obtained via S‐alkylation of thiopyrimidin‐4‐one.
ChemInform Abstract: Synthesis of 6‐Cyano and 6‐Unsubstituted 2‐Aryl‐8‐oxopurine from a Common 2‐Oxoimidazole Precursor.
Authors: Zaki Magdi E. A. , Proenca M. Fernanda 
Published: May 2011

AbstractIntramolecular cyclization of imines (III) in the presence of DBU results in formation of imidazole derivatives (IV) which are slowly transformed into 6‐cyano oxopurine (V) in the presence of TFA.
ChemInform Abstract: Microwave Supported Synthesis of Some Novel 1,3‐Diarylpyrazino[1,2‐a]benzimidazole Derivatives and Investigation of Their Anticancer Activities.
Authors: Demirayak Seref , Kayagil Ismail , Yurttas Leyla 
Published: May 2011

AbstractThe respective products (II) as well as the corresponding starting material (I) are tested in terms of their antileukemic activity.
ChemInform Abstract: 4‐Anilinoquinoline Triazines: A Novel Class of Hybrid Antimalarial Agents.
Authors: Kumar Ashok , Srivastava Kumkum , Kumar S. Raja , Siddiqi M. I. , Puri Sunil K. , Sexana Jitendra K. , Chauhan Prem M. S. 
Published: May 2011

AbstractA series of novel chloroquinoline derivatives (I) is synthesized and evaluated in vitro for their antimalarial activity.Compounds (Ic)‐(If) exhibit antimalarial potency superior to chloroquine.
ChemInform Abstract: Reductive Lithiation of Methyl Substituted Diarylmethylsilanes: Application to Silanediol Peptide Precursors.
Authors: Hernandez Dacil , Mose Rasmus , Skrydstrup Troels 
Published: May 2011

AbstractAn effective approach to diarylsilyl lithium reagents and their conversion into silanol and silanediol peptide precursors is presented.
ChemInform Abstract: Regioselective Addition of Sulfur Dichloride and Selenium Tetrachloride to Diallyldimethylsilane as the Method of Preparation of Eight‐Membered Heterocycles Containing Silicon and Chalcogens.
Authors: Martynov A. V. , Makhaeva N. A. , Larina L. I. , Amosova S. V. 
Published: May 2011

AbstractThe electrophilic addition of SCl2 or SeCl4 to diallylsilane (I) proceeds strictly according to the Markovnikoff rule furnishing previously unknown thiasilacyclooctane (II) or selenasilaoctane (III), respectively.
ChemInform Abstract: Selective Synthesis of α‐Fluoro‐β‐keto‐ and α‐Fluoro‐β‐aminophosphonates via Electrophilic Fluorination by Selectfluor.
Authors: Radwan‐Olszewska Kinga , Palacios Francisco , Kafarski Pawel 
Published: May 2011

AbstractA efficient method to prepare α‐fluoro‐ and α,α‐difluoro‐β‐ketophosphonates as well as α‐fluoro‐β‐aminophosphonates is reported.
ChemInform Abstract: One‐Pot Three‐Component Kabachnik—Fields Synthesis of α‐Aminophosphonates Using H‐Beta Zeolite Catalyst.
Authors: Tillu V. H. , Dumbre D. K. , Wakharkar R. D. , Choudary V. R. 
Published: May 2011

AbstractThe operationally simple procedure provides an efficient access to the biologically interesting α‐aminophosphonates within a few hours.
ChemInform Abstract: Pd‐Catalyzed Amination as an Alternative to Nucleophilic Aromatic Substitution for the Synthesis of N‐Alkyltacrines and Analogues.
Authors: Ma Ming , Mehta Jimit , Williams Larry D. , Carlier Paul R. 
Published: May 2011

AbstractA mild and convenient approach to the synthesis of title compounds (III) and (IX) is based on Pd‐catalyzed amination of heteroaryl chlorides with primary amines.
ChemInform Abstract: New Quinazolinone Alkaloids within Rare Amino Acid Residue from Coral‐Associated Fungus, Aspergillus versicolor LCJ‐5‐4.
Authors: Zhuang Yibin , Teng Xiancun , Wang Yi , Liu Peipei , Li Guoqiang , Zhu Weiming 
Published: May 2011

AbstractThe structures of the new cottoquinazolines B (Ia), C (Ib), and D (Ic) are determined by spectroscopic means, X‐ray analysis, and chemical transformation.
ChemInform Abstract: Synthesis of Monofluoroalkenes via the Activation of Allylic C—F Bonds: A Novel Route to β‐Aminofluoroalkenes Using Pd‐Catalyzed Allylic Amination Reactions of 3,3‐Difluoropropenes
Authors: Paquin Jean‐Francois 
Published: May 2011

AbstractReview: ca. 50 refs.
Maternal depression and anxiety are associated with altered gene expression in the human placenta without modification by antidepressant use: Implications for fetal programming
Authors: Ponder Kathryn L. , Salisbury Amy , McGonnigal Bethany , Laliberte Alyse , Lester Barry , Padbury James F. 
Published: May 2011

AbstractWe sought to determine if maternal depression, anxiety, and/or treatment with selective serotonin reuptake inhibitors (SSRIs) affect placental human serotonin transporter (SLC6A4), norepinephrine transporter (SLC6A2), and 11β‐hydroxysteroid dehydrogenase type 2 (11β‐HSD2) gene expression. Relative mRNA expression was compared among placental samples (n = 164) from healthy women, women with untreated depression and/or anxiety symptoms during pregnancy, and women who used SSRIs. SLC6A4 expression was significantly increased in placentas from women with untreated mood disorders and from women treated with SSRIs, compared to controls. SLC6A2 and 11β‐HSD2 expression was increased in noncontrol groups, though the differences were not significant. SLC6A4, SLC6A2, and 11β‐HSD2 expression levels were positively correlated. The finding that maternal depression/anxiety affects gene expression of placental SLC6A4 suggests a possible mechanism for the effect(s) of maternal mood on fetal neurodevelopmental programming. SSRI treatment does not further alter the elevated SLC6A4 expression levels observed with exposure to maternal depression or anxiety. © 2011 Wiley Periodicals, Inc. Dev Psychobiol 53:711–723, 2011.
Determination of Trace Metals by Anodic Stripping Voltammetry Using a Carbon Nanotube Tower Electrode
Authors: Guo Xuefei , Yun Yeoheung , Shanov Vesselin N. , Halsall H. Brian , Heineman William R. 
Published: May 2011

AbstractAnodic stripping voltammetry (ASV) trace detection of the heavy metals ions Pb2+, Cd2+, Cu2+ and Zn2+ was done at highly aligned multi‐wall carbon nanotube tower electrodes (CNT tower electrodes). The CNT tower electrode is one type of CNT array that consists of millions of ordered super long CNTs. Osteryoung square‐wave stripping voltammetry was used for the stripping step. This electrode material shows good resolution for individual detection of these four metal ions with calculated detection limits of 12 nM, 25 nM, 44 nM and 67 nM for Pb2+, Cd2+, Cu2+ and Zn2+, respectively, for a deposition time of 120 s. The detectable limit was as low as 0.5 nM for a 10 min deposition.
Seismic vulnerability assessment to slight damage based on experimental modal parameters
Authors: Michel C. , Guéguen P. , Causse M. 
Published: May 2011

AbstractThe aim of this paper is to adjust behaviour models for each class of structure for vulnerability assessment by using ambient vibration. A simple model based on frequencies, mode shapes and damping, taken from ambient vibrations, allows computation of the response of the structures and comparison of inter‐storey drifts with the limits found in the literature for the slight damage grade, considered here as the limit of elastic behaviour. Two complete methodologies for building fragility curves are proposed: (1) using a multi‐degree of freedom system including higher modes and full seismic ground‐motion and (2) using a single‐degree of freedom model considering the fundamental mode f0 of the structure and ground‐motion displacement response spectra SD(f0). These two methods were applied to the city of Grenoble, where 60 buildings were studied. Fragility curves for slight damage were derived for the various masonry and reinforced concrete classes of buildings. A site‐specific earthquake scenario, taking into account local site conditions, was considered, corresponding to an ML = 5.5 earthquake at a distance of 15 km. The results show the benefits of using experimental models to reduce variability of the slight damage fragility curve. Moreover, by introducing the experimental modal model of the buildings, it is possible to improve seismic risk assessment at an overall scale (the city) or a local scale (the building) for the first damage grade (slight damage). This level of damage, of great interest for moderate seismic‐prone regions, may contribute to the seismic loss assessment. Copyright © 2011 John Wiley & Sons, Ltd.
Near real-time, on-site, quantitative analysis of PAHs in the aqueous environment using an antibody-based biosensor
Authors: Spier Candace R , Vadas George G , Kaattari Stephen L , Unger Michael A 
Published: May 2011

Abstract
Rapid, on-site, quantitative assessments of dissolved polycyclic aromatic hydrocarbons (PAHs) were demonstrated for two field applications. The platform, a KinExA Inline Sensor (Sapidyne Instruments), employed the monoclonal anti-PAH antibody, 7B2.3, which has specificity for 3- to 5-ring PAHs. A spatial study was conducted near a dredging site where contaminated sediments were being removed, and a temporal study was performed during a rainfall event. Most importantly, the generation of near real-time data guided management decisions in the field and determined proper sampling protocols for conventional analyses. The method was able to determine PAH concentrations as low as 0.3 µg/L, within 10 min of sample acquisition, and to assess 80+ samples (not including standards and blanks) in less than 3 d. These results were compared with a laboratory-based gas chromatography–mass spectrometry method in which a wide array of PAHs, including alkylated homologs, were examined. This system shows great promise as a field instrument for the rapid monitoring of PAH pollution. Environ. Toxicol. Chem. 2011; 30:1557–1563. © 2011 SETAC
Sorption of PBDE in low-density polyethylene film: Implications for bioavailability of BDE-209
Authors: Bao Lian-Jun , You Jing , Zeng Eddy Y 
Published: May 2011

Abstract
The coefficients of partitioning (Kpew) between low-density polyethylene (LDPE) film (50-µm thickness) and water for 23 polybrominated diphenyl ether (PBDE) congeners were determined based on a regression analysis of sorption kinetics over an extended exposure period (up to 365 d). A curvilinear relationship between log Kpew and log KOW (octanol–water partition coefficient) was obtained for the target BDE congeners with the turning point at log KOW approximately 8. Previously obtained dietary uptake efficiencies of BDE congeners in common carp (Cyprinus carpio) were also found to relate curvilinearly to log KOW. In addition, field-measured relative abundances of BDE-209 compiled from previous investigations conducted in the Pearl River Delta of South China were significantly (p &lt; 0.001) higher in abiotic samples (n = 79 from 11 matrices) than in biotic samples (n = 73 from 12 matrices), suggesting the likelihood for reduced bioavailability of BDE-209 in certain biota. Finally, a molecular-scale analysis indicated that the curvilinear relationship between log Kpew and log KOW can be attributed to the energy barrier that a molecule has to overcome as it attempts to diffuse into the LDPE structure, which can become significant for larger molecules. Similarly, the reduced bioavailability of BDE-209 in many biological species can be regarded as a reflection of the magnitude of molecular interactions between cell membranes and BDE-209. Environ. Toxicol. Chem. 2011; 30:1731–1738. © 2011 SETAC
Intercomparison and applicability of some dynamic and equilibrium approaches to determine methylated mercury species in pore water
Authors: Liu Jinling , Feng Xinbin , Qiu Guangle , Yao Heng , Shang Lihai , Yan Haiyu 
Published: May 2011

Abstract
To assess adequately the impact of methylmercury (MeHg) on sensitive wetland ecosystems, accurate measurements of MeHg in pore water are required. In the present study, the feasibility of three methods for porewater sampling was investigated with respect to MeHg in sediments and rice paddy fields. The performance of dialysis samplers (peepers), sediment core sectioning followed by porewater separation by centrifugation (core), and the thin film diffusive samplers (DGT) were evaluated. These methods were intercompared in field experiments at two sites in Guizhou province, SW China disparately impacted by mercury pollution. All the methods report that the concentrations of MeHg in the soils of the Gouxi (GX) rice paddy near Wanshan were much higher than that in the sediment of the Hongjiadu Reservoir (HR), which is located within the Wujiang River basin. The three methods also report different MeHg profiles at the same site. However, these methods exhibit different temporal and spatial resolution scales, due to the differing operations involved with the sampling methods, may also reflect different states of MeHg in pore water. This corresponds to MeHg derived from diffusive flux, equilibrium concentration, and bulk concentration in pore water detected by DGT, peeper, and sediment core, respectively. The advantages and limits of the three methods are also presented. Environ. Toxicol. Chem. 2011; 30:1739–1744. © 2011 SETAC