bluuebunny/crossref_metadata_2025_split huggingface dataset:
α‐O‐Linked Glycopeptide Mimetics: Synthesis, Conformation Analysis, and Interactions with Viscumin, a Galactoside‐Binding Model Lectin
Authors: Jiménez‐Barbero Jesús , Dragoni Elisa , Venturi Chiara , Nannucci Federico , Ardá Ana , Fontanella Marco , André Sabine , Cañada Francisco Javier , Gabius Hans‐Joachim , Nativi Cristina 
Published: September 2009

AbstractEfficient cycloaddition of a silylidene‐protected galactal with a suitable heterodiene yielded the basis for a facile diastereoselective route to a glycopeptide‐mimetic scaffold. Its carbohydrate part was further extended by β1–3‐linked galactosylation. The pyranose rings retain their 4C1 chair conformation, as shown by molecular modeling and NMR spectroscopy, and the typical exo‐anomeric geometry was observed for the disaccharide. The expected bioactivity was ascertained by saturation‐transfer‐difference NMR spectroscopy by using the galactoside‐specific plant toxin viscumin as a model lectin. The experimental part was complemented by molecular docking. The described synthetic route and the strategic combination of computational and experimental techniques to reveal conformational properties and bioactivity establish the prepared α‐O‐linked glycopeptide mimetics as promising candidates for further exploitation of this scaffold to give O‐glycans for lectin blocking and vaccination.
Design and Synthesis of Urea‐Linked Aromatic Oligomers—A Route Towards Convoluted Foldamers
Authors: Mousseau James J. , Xing Liyan , Tang Nathalie , Cuccia Louis A. 
Published: September 2009

AbstractHerein we report the design and synthesis of crescent‐shaped and helical urea‐based foldamers, the curvature of which is controlled by varying the constituent building blocks and their connectivity. These oligomers are comprised of two, three or five alternating aromatic heterocycles (pyridazine, pyrimidine or pyrazine) and methyl‐substituted aromatic carbocycles (tolyl, o‐xylyl or m‐xylyl) connected together through urea linkages. A crescent‐shaped conformational preference is encoded within these π‐conjugated urea‐linked oligomers based on intramolecular hydrogen bonding and steric interactions; the degree of curvature is tuned by the urea connectivity to the heterocycles and the aryl groups. NMR characterization of these foldamers confirms the intramolecular hydrogen‐bonded conformation expected (Z,E configuration of the urea bond) in both the pyridazyl and pyrimidyl foldamers in solution. An X‐ray crystal structure of the N3,N6‐diisobutylpyridazine‐4,6‐diamine–o‐tolyl urea‐linked foldamer (4) confirms the presence of NH⋅⋅⋅N hydrogen bonds between the heterocyclic nitrogen atom and the free hydrogen of the urea linkage. Additionally, the tolyl methyl group interacts unfavourably with the urea carbonyl oxygen, thus destabilising the alternate planar conformation.
Low‐Concentration 1,2‐trans β‐Selective Glycosylation Strategy and Its Applications in Oligosaccharide Synthesis
Authors: Chao Chin‐Sheng , Li Chen‐Wei , Chen Min‐Chun , Chang Shih‐Sheng , Mong Kwok‐Kong Tony 
Published: September 2009

AbstractThis study develops an operationally easy, efficient, and general 1,2‐trans β‐selective glycosylation reaction that proceeds in the absence of a C2 acyl function. This process employs chemically stable thioglycosyl donors and low substrate concentrations to achieve excellent β‐selectivities in glycosylation reactions. This method is widely applicable to a range of glycosyl substrates irrespective of their structures and hydroxyl‐protecting functions. This low‐concentration 1,2‐trans β‐selective glycosylation in carbohydrate chemistry removes the restriction of using highly reactive thioglycosides to construct 1,2‐trans β‐glycosidic bonds. This is beneficial to the design of new strategies for oligosaccharide synthesis, as illustrated in the preparation of the biologically relevant β‐(1→6)‐glucan trisaccharide, β‐linked Gb3 and isoGb3 derivatives.
Sterically‐Directed Consecutive and Size‐Selective Self‐Assembly of Palladium Diphosphane Complexes with an Ar‐BIAN Ligand: Unexpected Formation of Pentameric and Hexameric Aggregates
Authors: Holló‐Sitkei Eszter , Szalontai Gábor , Lois Isabella , Gömöry Ágnes , Pollreisz Ferenc , Párkányi László , Jude Hershel , Besenyei Gábor 
Published: September 2009

AbstractThe coordination properties of N,N′‐bis[4‐(4‐pyridyl)phenyl]acenaphthenequinonediimine (L1) and N,N′‐bis[4‐(2‐pyridyl)phenyl]acenaphthenequinonediimine (L2) were investigated in self‐assembly with palladium diphosphane complexes [Pd(P^P)(H2O)2](OTf)2 (OTf=triflate) by using various analytical techniques, including multinuclear (1H, 15N, and 31P) NMR spectroscopy and mass spectrometry (P^P=dppp, dppf, dppe; dppp=bis(diphenylphosphanyl)propane, dppf= bis(diphenylphosphanyl)ferrocene, and dppe=bis(diphenylphosphanyl)ethane). Beside the expected trimeric and tetrameric species, the interaction of an equimolar mixture of [Pd(dppp)]2+ ions and L1 also generates pentameric aggregates. Due to the E/Z isomerism of L1, a dimeric product was also observed. In all of these species, which correspond to the general formula [Pd(dppp)L1]n(OTf)2n (n=2–5), the L1 ligand is coordinated to the Pd center only through the terminal pyridyl groups. Introduction of a second equivalent of the [Pd(dppp)]2+ tecton results in coordination to the internal, sterically more encumbered chelating site and induces enhancement of the higher nuclearity components. The presence of higher‐order aggregates (n=5, 6), which were unexpected for the interaction of cis‐protected palladium corners with linear ditopic bridging ligands, has been demonstrated both by mass‐spectrometric and DOSY NMR spectroscopic analysis. The sequential coordination of the [Pd(dppp)]2+ ion is attributed to the dissimilar steric properties of the two coordination sites. In the self‐assembled species formed in a 1:1:1 mixture of [Pd(dppp)]2+/[Pd(dppe)]2+/L1, the sterically more demanding [Pd(dppp)]2+ tectons are attached selectively to the pyridyl groups, whereas the more hindered imino nitrogen atoms coordinate the less bulky dppe complexes, thus resulting in a sterically directed, size‐selective sorting of the metal tectons. The propensity of the new ligands to incorporate hydrogen‐bonded solvent molecules at the chelating site was confirmed by X‐ray diffraction studies.
Synthesis, X‐ray Structure of Ferrocene Bearing Bis(Zn‐cyclen) Complexes and the Selective Electrochemical Sensing of TpT
Authors: Zeng Zhanghua , Torriero Angel A. J. , Belousoff Matthew J. , Bond Alan M. , Spiccia Leone 
Published: September 2009

AbstractThe new ligand, [Fc(cyclen)2] (5) (Fc=ferrocene, cyclen=1,4,7,10‐tetraazacyclododecane), and corresponding ZnII complex receptor, [Fc{Zn(cyclen)(CH3OH)}2](ClO4)4 (1), consisting of a ferrocene moiety bearing one ZnII‐cyclen complex on each cyclopentadienyl ring, have been designed and prepared through a multi‐step synthesis. Significant shifts in the 1H NMR signals of the ferrocenyl group, cf. ferrocene and a previously reported [Fc{Zn(cyclen)}]2+ derivative, indicated that the two ZnII‐cyclen units in 1 significantly affect the electronic properties of the cyclopentadienyl rings. The X‐ray crystal structure shows that the two positively charged ZnII‐cyclen complexes are arranged in a trans like configuration, with respect to the ferrocene bridging unit, presumably to minimise electrostatic repulsion. Both 5 and 1 can be oxidized in 1:4 CH2Cl2/CH3CN and Tris‐HCl aqueous buffer solution under conditions of cyclic voltammetry to give a well defined ferrocene‐centred (Fc0/+) process. Importantly, 1 is a highly selective electrochemical sensor of thymidilyl(3′‐5′)thymidine (TpT) relative to other nucleobases and nucleotides in Tris‐HCl buffer solution (pH 7.4). The electrochemical selectivity, detected as a shift in reversible potential of the Fc0/+ component, is postulated to result from a change in the configuration of bis(ZnII‐cyclen) units from a trans to a cis state. This is caused by the strong 1:1 binding of the two deprotonated thymine groups in TpT to different ZnII centres of receptor 1. UV‐visible spectrophotometric titrations confirmed the 1:1 stoichiometry for the 1:TpT adduct and allowed the determination of the apparent formation constant of 0.89±0.10×106 M−1 at pH 7.4.
Theoretical Insights on Methylbenzene Side‐Chain Growth in ZSM‐5 Zeolites for Methanol‐to‐Olefin Conversion
Authors: Lesthaeghe David , Horré Annelies , Waroquier Michel , Marin Guy B. , Van Speybroeck Veronique 
Published: September 2009

AbstractThe key step in the conversion of methane to polyolefins is the catalytic conversion of methanol to light olefins. The most recent formulations of a reaction mechanism for this process are based on the idea of a complex hydrocarbon‐pool network, in which certain organic species in the zeolite pores are methylated and from which light olefins are eliminated. Two major mechanisms have been proposed to date—the paring mechanism and the side‐chain mechanism—recently joined by a third, the alkene mechanism. Recently we succeeded in simulating a full catalytic cycle for the first of these in ZSM‐5, with inclusion of the zeolite framework and contents. In this paper, we will investigate crucial reaction steps of the second proposal (the side‐chain route) using both small and large zeolite cluster models of ZSM‐5. The deprotonation step, which forms an exocyclic double bond, depends crucially on the number and positioning of the other methyl groups but also on steric effects that are typical for the zeolite lattice. Because of steric considerations, we find exocyclic bond formation in the ortho position to the geminal methyl group to be more favourable than exocyclic bond formation in the para position. The side‐chain growth proceeds relatively easily but the major bottleneck is identified as subsequent de‐alkylation to produce ethene. These results suggest that the current formulation of the side‐chain route in ZSM‐5 may actually be a deactivating route to coke precursors rather than an active ethene‐producing hydrocarbon‐pool route. Other routes may be operating in alternative zeotype materials like the silico‐aluminophosphate SAPO‐34.
ChemInform Abstract: Structural and Compositional Investigations of Zr4Pt2O: A Filled‐Cubic Ti2Ni‐Type Phase.
Authors: Gupta Shalabh , Sordelet Daniel J. , Corbett John D. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Structures and Phase Transitions of Sr2CrSbO6.
Authors: Faik A. , Igartua J. M. , Gateshki M. , Cuello G. J. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Reduction of Eu3+ to Eu2+ in MAl2Si2O8 (M: Ca, Sr, Ba) in Air Condition.
Authors: Zhang Cuimiao , Yang Jun , Lin Cuikun , Li Chunxia , Lin Jun 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Magnetic and Dielectric Properties of YbFe2‐xMnxO4 (O ≤ x ≤ 1).
Authors: Yoshii Kenji , Ikeda Naoshi , Michiuchi Takamasa , Yokota Yusuke , Okajima Yuka , Yoneda Yasuhiro , Matsuo Yoji , Horibe Yoichi , Mori Shigeo 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Micrometer‐Size TiO2 Single‐Crystal Photocatalyst with Remarkable 80% Level of Reactive Facets.
Authors: Zhang Dieqing , Li Guisheng , Yang Xianfeng , Yu Jimmy C. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: X‐Ray Diffraction, X‐Ray Photoelectron Spectra, Crystal Structure, and Optically Properties of Centrosymmetric Strontium Borate Sr2B16O26.
Authors: Reshak Ali Hussain , Auluck S. , Kityk I. V. , Chen Xuean 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Structural and Spectroscopic Investigation of Lanthanum‐Substituted Strontium‐Oxybrithiolites.
Authors: Boughzala K. , Nasr S. , Salem E. Ben , Kooli F. , Bouzouita K. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: [Zr0.72Y0.28]Al4C4: A New Member of the Homologous Series (MC)l(T4C3)m (M: Zr, Y and Hf, T: Al, Si and Ge).
Authors: Sugiura Keita , Iwata Tomoyuki , Nakano Hiromi , Fukuda Koichiro 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The First Three‐Dimensional Vanadium Hypophosphite.
Authors: Maouel Hind A. , Alonzo Veronique , Roisnel Thierry , Rebbah Houria , Le Fur Eric 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Room Temperature Synthesis of the Larger Power, High Silver Density Cathode Material Ag4V2O6F2 for Implantable Cardioverter Defibrillators.
Authors: Albrecht Thomas A. , Sauvage Frederic , Bodenez Vincent , Tarascon Jean‐Marie , Poeppelmeier Kenneth R. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Synthesis of α‐Alkylated N‐Sulfinyl Imidates as New Chiral Building Blocks.
Authors: Colpaert Filip , Mangelinckx Sven , Verniest Guido , De Kimpe Norbert 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Regio‐ and Stereoselective Isomerizations of Allenamides: Synthesis of 2‐Amido‐dienes and Their Tandem Isomerization‐Electrocyclic Ring‐Closure.
Authors: Hayashi Ryuji , Hsung Richard P. , Feltenberger John B. , Lohse Andrew G. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Aldol‐Type Chirons from Asymmetric Hydrogenations of Trisubstituted Alkenes.
Authors: Zhao Jian , Burgess Kevin 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Regio‐ and Stereoisomeric Study of Allylic Alcohol Fluorination with a Range of Reagents.
Authors: Bresciani Stefano , Slawin Alexandra M. Z. , O'Hagan David 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: N‐Tosyl‐S‐difluoromethyl‐S‐phenylsulfoximine (II): A New Difluoromethylation Reagent for S‐, N‐, and C‐Nucleophiles.
Authors: Zhang Wei , Wang Fei , Hu Jinbo 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Titanocene‐Promoted Intermolecular Couplings of Epoxides with Nitriles. An Easy Access to β‐Hydroxyketones.
Authors: Fernandez‐Mateos A. , Madrazo S. Encinas , Teijon P. Herrero , Gonzalez R. Rubio 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium‐Catalyzed Cross‐Coupling Reactions of Organomercurials
Authors: More P. G. , Dalave N. V. , Lawand A. S. , Nalawade A. M. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A TFAA‐H3PO4‐Mediated Direct, Metal‐Free and High‐Speed Synthesis of Aryl Carboxylate Esters from Phenols.
Authors: Kankanala Kavitha , Reddy Vangala Ranga , Mukkanti Khagga , Pal Sarbani 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Supported Silver Nanoparticle Catalyst for Selective Hydration of Nitriles to Amides in Water.
Authors: Mitsudome Takato , Mikami Yusuke , Mori Haruhiko , Arita Shusuke , Mizugaki Tomoo , Jitsukawa Koichiro , Kaneda Kiyotomi 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Deprotection of Arenediazonium Tetrafluoroborate Ethers with BBr3.
Authors: Nguyen Ngoc Hoa , Cougnon Charles , Gohier Frederic 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Co‐Catalyst Enhancement of Enantioselective PTC Michael Additions Involving Glycine Imines.
Authors: Lygo Barry , Beynon Christopher , Lumley Christopher , McLeod Michael C. , Wade Charles E. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Cycloadditions of Chiral Carbonyl Ylides with Imine Dipolarophiles as a Route to Enantiomerically Pure β‐Amino‐α‐hydroxy Acids.
Authors: Gan Yu , Harwood Laurence M. , Richards Simon C. , Smith Ian E. D. , Vinader Victoria 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Cyclohexanes via [3 + 3] Hexannulation of Cyclopropanes and 2‐Chloromethyl Allylsilanes.
Authors: Sapeta Katarina , Kerr Michael A. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of α‐Trifluoromethylstyrene Derivatives via Ni‐Catalyzed Cross‐Coupling of 2‐Bromo‐3,3,3‐trifluoropropene and Aryl Grignard Reagents.
Authors: Kobayashi Osamu , Uraguchi Daisuke , Yamakawa Tetsu 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Yb[N(SO2C8F17)2] 3‐Catalyzed Allylation of 1,3‐Dicarbonyl Compounds with Allylic Alcohols in a Fluorous Biphase System.
Authors: Shen Ming‐Gui , Cai Chun , Yi Wen‐Bin 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Microwave‐Assisted Solvent‐Free Synthesis of Some Bioactive Substituted Dihalo 1,4‐Benzoquinones on Silica Gel Solid Support.
Authors: Batra Manoj Kumar , Batra Chhavi , Ojha K. G. 
Published: September 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.