bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photochemistry Synthesis and Characterization of Benzocycloheptan‐1,5‐Dione Derivatives
Authors: Mansri Ali , Casals Pierre‐FranÇOis , Fan Bo Tao 
Published: September 2010

AbstractSome new benzocycloheptan‐1,5‐diones derivatives I (3: R = t‐Bu, R' = H; 4: R = Ph, R' = H; 5: R = PhCOCH2, R' = H; 6: R = CH3COCH2, R' = H; 7: R = t‐Bu, R' = ethenyle and 8: R = Ph, R' = ethenyle) were synthetized through photocycloaddition of 2‐acylindan‐1,3‐diones 2 with styrene and paradivinylbenzene (pDVB) respectively.The reaction proceeds regioselectively at the endocyclic enol. This regioselectivity was not observed on the linear β‐triketones, previously reported [1]. The formation of a double addition product paradi‐(2,5‐dioxo‐6‐(2,2‐dimethylpropionyl)‐benzocycloheptyl)‐benzene 9 shows how a network could be formed if these 2‐acylindan‐1,3‐diones 2 moities are graft in side chains of macromolecules. The enolic equilibrium of the obtained benzocycloheptan‐1,5‐ diones derivatives, are discussed. Every products were characterized by means of elemental analysis and IR, UV, 1H and 13C NMR spectroscopies.
Condensation 2‐Methyl Indole/Juglone. Synthese De la Premiere 3,8‐Diindolyl‐5‐Hydroxy‐1,4 Naphtoquinone
Authors: Henrion Jean‐Christophe , Jacquet Bernard , Hocquaux Michel , Lion Claude , Barre Gilles 
Published: September 2010

AbstractAddition of two 2‐methyl indole residues to 5‐hydroxy‐1,4‐naphthoquinone leads to the unknown 3,8‐di‐(2‐methyl‐3‐indolyl)‐5‐hydroxy‐1,4‐naphthoquinone, first example of the new 3,8‐di‐indoly‐1,4 naphthoquinones series.
Reversed “Inverse Superatoms” (Double Fullerene‐Type Systems)
Authors: Balaban Alexandru T. , Seitz Wiliam A. , Klein Douglas J. 
Published: September 2010

AbstractUnlike the C60@Si60 “inverse superatom” described by Osawa et al., the present paper discusses double cages formed from Si60 cages inside carbon fullerene‐type cages.
The Total Synthesis of (±)‐Isopisiferin Methyl Ether
Authors: Wang Xuechao , Cui Yuxin , Pan Xinfu , Chen Yaozu 
Published: September 2010

AbstractA novel and effective convergent synthesis of (æ)‐isopisiferin methyl ether, a rearranged abietane diterpene, having a hexahydrodibenzo [a,o'] cycloheptene ring system, was achieved by Wittig reaction, selective hydrogenation and selective oxidation.
Synthesis of Some New Pyrazolo[4,3‐B]Pyridine, Pyridine, Pyrazolo[1,5‐A]Pyrimidine and Thiazole Derivatives
Authors: El‐Taweel Fathy M. A. 
Published: September 2010

AbstractSeveral new pyrazolopyridines 6a‐e and pyridines 9a,b and 20a‐d prepared by reacting 4‐substituted pyrazolones 1a‐c with the ylidenenitriles 2 or 3. Reaction of 5‐aminopyrazole 21 with ethyl acrylate or ethyl bromopropionate afforded pyrazolo[1,5‐a]pyrimidine 22. The thiazole derivatives 27 were prepared via reaction of 24 with 2a,b,g or 2h,i,k or by condensation of 24 with aromatic aldehydes and acetophenone.
Crystal Structure of (2r*,3s*)‐n,n,2‐Trimethyl‐2,3‐Diphenylpent‐4‐Enamide
Authors: Feneau‐Dupont J. , Declercq J. P. , Patiny L. 
Published: September 2010

AbstractC20H23NO, Mr = 293.39, monoclinic, C2/c, a = 19.541(2), b = 7.159(1), c = 24.147(2)Å, β = 92.65(1), V = 3374.4(5)Å3, Z = 8, Dx = 1.16g.cm−3, CuKα radiation (λ = 1.54178Å). The final R indice is 0.055 for 2416 observed reflections.
1,3‐Dipolar Cycloaddition Reactions of Some 3‐Aryl‐Phthalazinium‐1‐Olates, Part II
Authors: Çelebi N. , Kayalidere I. , Türker L. 
Published: September 2010

AbstractReactions of some new 3‐aryl‐phthalazinium‐l‐olates were studied with olefinic and acetylenic dipolarophiles giving the expected cycloadducts. However, the cycloaddition of 3‐(4',6'‐dimethylpyrimidin‐2'‐yl)‐phthalazinium‐l‐olate with ethyl acetylenecarboxylate was not regioselective and gave a mixture of two possible regioisomers.
Nitration de Benzimidazoles Substitues
Authors: Benchidmi M. , El Kihel A. , Essassi E. M. , Knouzi N. , Toupet L , Danion‐Bougot R. , Carrié R. 
Published: September 2010

AbstractThe mononitration of some 2‐Alkyl‐5(6)chloro‐(or methyl‐) benzimidazoles was carried out because the chemical literature results were ambiguous. Our work has shown that the nitro group was introduced in 6 (or 5) position.
Crystal Structure of (2R*,5R*)‐1‐(Anilinocarbonyl)‐2,5‐Bis [(1‐Methoxy‐1‐Methyl)Ethyl]Pyrrolidine
Authors: Feneau‐Dupont J. , Declercq J. P. , Patiny L. 
Published: September 2010

AbstractC19H30N2O3, Mr = 334.45, monoclinic, Pc, a = 9.933(2), b = 6.485(2), c = 14.869(2)Å, β = 99.82(2)°, V = 943.8(3)Å3, Z= 2, Dx= 1.18g.cm−3, CuKα radiation (λ = 1.54178Å). The final R indice is 0.042 for 1539 observed reflections.
Crystal Structure of (3S,4R)‐4‐Iodomethyl‐2,2‐Dimethyl‐3‐Phenyl‐4‐Butanolide
Authors: Feneau‐Dupont J. , Declercq J. P. , Patiny L. 
Published: September 2010

AbstractC13H15IO2, Mr = 330.15, orthorhombic, P212121, a = 6.139(1), b = 10.047(2), c = 21.134(5)Å, V = 1303.5(5)Å3, Z = 4, Dx= 1.68g.cm−3, MoKα radiation (λ = 0.71069Å). The final R indice is 0.044 for 1735 observed reflections
Alkylation Studies with Isopropylidene Malonate under PTC and Dibenzo‐(18)‐Crown‐6
Authors: Kore A. R. , Mane R. B. , Salunkhe M. M. 
Published: September 2010

AbstractIsopropylidene malonate (2,2‐dimethyl‐4,6‐dioxo‐1,3‐dioxane, Meldrum's acid) has a high acidity (pK1 = 4.97), a rigid cyclic structure and can undergo easy hydrolysis. It has become an attractive reagent in organic synthesis.1 For example, it can readily undergo Knoevenagel condensation,2‐5 Michael addition,6‐7 and acylation8,9 reactions. However, few reports on its alkylation are reported. 10‐13 On alkylation of isopropylidene malonate under (20% aqueous sodium hydroxide (TEBA) the ring underwent cleavage and the main product was α,α‐dimethylmalonic acid methyl ester. This problem was solved by the use of solid potassium carbonate in place of 20% aqueous sodium hydroxide to avoid hydrolysis and let the reaction undergo under solid‐liquid phase‐transfer conditions.14 However, these require reflux conditions and prolonged reaction times (4 to 8 h.). Our results on the use of combination of a phase‐transfer catalyst and crown ether15 promoted us to investigate the bis alkylation studies with isopropylidene malonate.
Quadrupole ICP ‐ Mass Spectrometry for the Determination of The Aqua Regia Soluble Content of Trace Metals in Soil and Sludge Candidate Reference Materials
Authors: Vanhaecke Frank , Vanhoe Hans , Moens Luc , Dams Richard 
Published: September 2010

AbstractIn the framework of a certification campaign, organised by the European Community Bureau of References (BCR), quadrupole inductively coupled plasma ‐ mass spectrometry (ICP‐MS) was used for the determination of the aqua regia soluble contents of Mn, Co, Ni, Cu, Zn, Cd, Hg and Pb in three different soil and sludge candidate reference materials (BCR CRM 141R, 144R and 146R). Especially for the transition metals, for which accurate quantitation is often hampered by the presence of spectral interferences, great care was taken in avoiding systematic errors due to overlap with signals from polyatomic ions and/or isobaric nuclides showing the same nominal mass as the nuclides of interest. Si‐based interferences were avoided by additional HF‐treatment of the samples obtained after aqua regia extraction. The presence of other potential interferences was checked by registration of signal behaviour plots (signal intensity as a function of the nebulizer gas flow rate) and/or measurement with a high resolution ICP ‐ mass spectrometer. In order to obtain the highest accuracy possible, both external standardization and the method of standard additions were used for calibration and the results obtained were compared. Hence it was shown that, despite the use of an internal standard, for some elements accurate results could only be obtained using the method of standard additions. Finally, for Hg and Pb, besides the calibration techniques already mentioned, also isotope dilution was used. For all materials analysed, the results obtained are in excellent agreement with the values finally certified.
Qualitative Comparison of the Powder Diffraction Pattern of 1,1,2,4,4,7‐Hexamethyl‐6,8‐Dinitrotetralin with its Calculated Powder Diagram and that of 1,1,2,4,4,7‐Hexamethyl‐5,6‐Dinitrotetralin
Authors: De Ridder Dirk J. A. , Driessen René A. J. , Goubitz Kees , Schenk Henk 
Published: September 2010

AbstractThe powder diffraction patterns of 1,1,2,4,4,7‐hexamethyl‐6‐nitrotetralin (1) and 1,1,2,4,4,7‐hexamethyl‐6,8‐dinitrotetralin (2) have been recorded and are qualitatively compared with the powder diffraction diagrams calculated from the respective single‐crystal structures, showing good agreement. The observed diffractogram of (2) is also compared with the powder diagram calculated from the single‐crystal structure of 1,1,2,4,4,7‐hexamethyl‐5,6‐dinitrotetralin (3), showing significant differences.
Synthesis of New 1,3‐Dioxepin Derivatives
Authors: Tahnh Naciye , Sirkecioglu Okan , Mirzalar Filiz 
Published: September 2010

AbstractUsing cis‐2‐buten‐1,4‐diol and mono and dicarbonyl compounds eleven new 4,7‐dihydro‐1,3‐dioxepin derivatives were synthesized. Structures were proved by spectroscopic methods.
Water Solubility of Sparingly Soluble Salts of Weak Acids and/Or bases. Improved‐Accuracy Calculation Methods
Authors: Giomini Claudio , Marrosu Giancarlo , Cardinali Mario E. 
Published: September 2010

AbstractMethods are described for accurate calculations of the water solubilities of sparingly‐soluble salts derived from weak acids and/or bases, when the known data are the solubility product and the ionization constants. Various cases are considered, with their possible extensions. Two successive‐substitution, always‐converging algorithms are developed for a rigorous treatment of some cases, for which also an approximate treatment is proposed. For other cases, an interval‐bisection algorithm is suggested. Conditions under which the conventional formulae can be safely employed are established. Practical examples of calculations are given and discussed.
New Trifluoromethylated Imidazolidines, Oxazolidines and Thiazolidines Starting from 3‐(1,1‐Dihydroxy‐2,2,2‐Trifluoroethyl)‐1‐Methyl‐Tetrahy‐Droazepin‐2‐one and α‐(1,1‐Dihydroxy‐2,2,2‐Trifluoroethyl)‐γ‐Butyrolactone
Authors: Bouillon J. P. , Ates C. , Janousek Z. , Viehe H. G. , Tinant B. , Declercq J. P. 
Published: September 2010

AbstractHeterocyclisations of 1,4‐bis‐nucleophiles with the tetrahydroazepin‐2‐one 1 and γ‐butyrolactone 2 gave imidazoline 9, 12, oxazolidines 3, 10, 13, 15 and thiazolidine 4 as a mixture of two diastereoisomers in various proportions. The structure and the relative configurations of these heterocycles were established by X‐ray diffraction analysis and by comparison of 19F‐ and 13C‐NMR data.
Improved Catalysts for the Iridium‐Catalyzed Asymmetric Isomerization of Primary Allylic Alcohols Based on Charton Analysis
Authors: Mantilli Luca , Gérard David , Torche Sonya , Besnard Céline , Mazet Clément 
Published: September 2010

AbstractAn improved generation of chiral cationic iridium catalysts for the asymmetric isomerization of primary allylic alcohols is disclosed. The design of these air‐stable complexes relied on the preliminary mechanistic information available, and on Charton analyses using two preceding generations of iridium catalysts developed for this highly challenging transformation. Sterically unbiased chiral aldehydes that were not accessible previously have been obtained with high levels of enantioselectivity, thus validating the initial hypothesis regarding the selected ligand‐design elements. A rationale for the high enantioselectivities achieved in most cases is also presented.
Atomic‐Level Elucidation of the Initial Stages of Self‐Assembled Monolayer Metallization and Nanoparticle Formation
Authors: Keith John A. , Jacob Timo 
Published: September 2010

AbstractThe development of high‐performance molecular electronics and nanotech applications requires deep understanding of atomic level structural, electronic, and magnetic properties of electrode/molecular interfaces. Recent electrochemical experiments on self‐assembled monolayers (SAMs) have identified highly practical means to generate nanoparticles and metal monolayers suspended above substrate surfaces through SAM metallizations. A rational basis why this process is even possible is not yet well‐understood. To clarify the initial stages of interface formation during SAM metallization, we used first‐principles spin‐polarized density functional theory (DFT) calculations to study Pd diffusion on top of 4‐mercaptopyridine (4MP) SAMs on Au(111). After distinguishing potential‐energy surfaces (PESs) for different spin configurations for transition metal atoms on the SAM, we find adatom diffusion is not possible over the clean 4MP–SAM surface. Pre‐adsorption of transition‐metal atoms, however, facilitates atomic diffusion that appears to explain multiple reports on experimentally observed island and monolayer formation on top of SAMs. Furthermore, these diffusions most likely occur by moving across low‐lying and intersecting PESs of different spin states, opening the possibility of magnetic control over these systems. Vertical diffusion processes were also investigated, and the electrolyte was found to play a key role in preventing metal permeation through the SAM to the substrate.
ChemInform Abstract: Ab initio Calculation of Inner‐Sphere Reorganization Energies of Inorganic Redox Couples.
Authors: EBERSON L. , GONZALEZ‐LUQUE R. , LORENTZON J. , MERCHAN M. , ROOS B. O. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Ab initio Study on the Structure of Dinitrogen Tetroxide: Is There a D2d Conformer?
Authors: LIU R. , ZHOU X. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Theoretical Prediction of a Polycyclic Modification of Polythiazyl. A New Molecular Superconductor?
Authors: JONES W. H. , BARDO R. D. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Monomeric YCl3 ‐ Planar or Pyramidal?
Authors: MARSDEN C. J. , SMART B. A. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Two Families of Centered Zirconium Cluster Phases with M1,2M′Cl6× Zr6Cl12Z Compositions.
Authors: ZHANG J. , CORBETT J. D. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Dy10.14Mn12.86C18, Yb10.09Mn12.91C18 and Other Rare Earth Manganese Carbides with a Structure Derived from that of α‐Mn.
Authors: KAHNERT G. E. , JEITSCHKO W. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Complex Formation in Pyrosulfate Melts. Part 4. Density, Potentiometry, Calorimetry, and Conductivity of the Systems Cs2S2O7‐V2O5, Cs2S2O7‐ Cs2SO4, and Cs2S2O7‐Cs2SO4‐V2O5 in the Temperature Range 340‐550 . degree.C.
Authors: FOLKMANN G. E. , HATEM G. , FEHRMANN R. , GAUNE‐ESCARD M. , BJERRUM N. J. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Catalytic Activity and Structural Analysis of Polymer‐Protected Au/Pd Bimetallic Clusters Prepared by the Successive Reduction of HAuCl4 and PdCl2.
Authors: HARADA M. , ASAKURA K. , TOSHIMA N. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Sol‐Gel Ru/SiO2‐Catalysts: Theoretical and Experimental Determination of the Ru‐in‐Silica Structures.
Authors: LOPEZ T. , GOMEZ R. , NOVARO O. , RAMIREZ‐SOLIS A. , SANCHEZ‐MORA E. , CASTILLO S. , POULAIN E. , MARTINEZ‐MAGADAN J. M. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Isomorphous Substitution and the Generation of Catalytic Activity in VPI‐5.
Authors: KRAUSHAAR‐CZARNETZKI B. , DOGTEROM R. J. , STORK W. H. J. , EMEIS K. A. , VAN BRAAM HOUCKGEEST J. P. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Identification of New Hydrogen Species Adsorbed on Ruthenium Sulfide by Neutron Spectroscopy.
Authors: JOBIC H. , CLUGNET G. , LACROIX M. , YUAN S. , MIRODATOS C. , BREYSSE M. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Oxides of Nitrogen. Their Formation, Transformation, and the Possibilities of Capture.
Authors: MOCEK K. , STEJSKALOVA K. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Phosphorus(V) Nitrides: Preparation, Properties, and Possible Applications of New Solid State Materials with Structural Analogies to Phosphates and Silicates.
Authors: SCHNICK W. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 New Class of Phosphate Compounds: Introduction of Nitrogen in the Tetrahedral Phosphorus Environment
Authors: MARCHAND R. , CONANEC R. , GUEGUEN E. , LAURENT Y. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Mechanochemical Synthesis of Lithium Ferrites.
Authors: KARAGEDOV G. R. , KONOVALOVA E. A. , LYAKHOV N. Z. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Catalyst Activity in the Copper(I) Catalyzed Grignard Coupling with Alkyl Halides Containing β‐ and γ‐Oxygen Functionality.
Authors: ERDIK E. , DUESMEZKALENDER F. , OEZLUE Y. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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. Part 19. Asymmetric Autocatalysis of (R)‐1‐ Phenylpropan‐1‐ol Mediated by a Catalytic Amount of Amine in the Addition of Diethylzinc to Benzaldehyde.
Authors: LI S. , JIANG Y. , MI A. , YANG G. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Inversion of the Configuration of Cyanohydrins by a Mitsunobu Esterification Reaction
Authors: WARMERDAM E. G. J. C. , BRUSSEE J. , KRUSE C. G. , VAN DER GEN A. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Triazene Moiety as a Protecting Group for Aromatic Amines.
Authors: GROSS M. L. , BLANK D. H. , WELCH W. M. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: π‐Facial Diastereoselectivity in the Electrophilic and Electrophilic‐Nucleophilic Additions to Dimethyl (1R,2R,3S,4S)‐Bicyclo( 2.2.2)oct‐5‐ene‐2,3‐dicarboxylate.
Authors: JONES G. R. , VOGEL P. 
Published: September 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.