bluuebunny/crossref_metadata_2025_split huggingface dataset:
Catalytic Asymmetric Cyano‐Ethoxycarbonylation Reaction of Aldehydes Using a Novel C2‐Symmetric Chiral N,N′‐Dioxide Titanium Complex.
Authors: Li Qinghan , Chang Lu , Liu Xiaohua , Feng Xiaoming 
Published: October 2006

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, please click on HTML or PDF.
Novel Rh Catalysis in Cross‐Coupling Between Alkyl Halides and Arylzinc Compounds Possessing ortho‐COX (X: OR, NMe2, or Ph) Groups.
Authors: Takahashi Hideki , Inagaki Shinya , Nishihara Yasushi , Shibata Takanori , Takagi Kentaro 
Published: October 2006

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, please click on HTML or PDF.
Homocoupling of Aryl Bromides Catalyzed by Nickel Chloride in Pyridine.
Authors: Tao Xiao‐Chun , Zhou Wei , Zhang Yue‐Ping , Dai Chun‐Ya , Shen Dong , Huang Mei 
Published: October 2006

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, please click on HTML or PDF.
Asymmetric Alkynyl Additions to Aldehydes Catalyzed by Tunable Oxovanadium(V) Complexes of Schiff Bases of β‐Amino Alcohols.
Authors: Hsieh Sheng‐Hsiang , Gau Han‐Mou 
Published: October 2006

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, please click on HTML or PDF.
Novel Thermal Iminocyclopropene Rearrangements: Regioselectivity in the Synthesis of Pyrroles.
Authors: Sato Hiroyasu , Hiroi Kunio 
Published: October 2006

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, please click on HTML or PDF.
A Practical Mild, One‐Pot, Regiospecific Synthesis of 2,3‐Disubstituted Indoles via Consecutive Sonogashira and Cacchi Reactions.
Authors: Lu Bruce Z. , Zhao Wenyi , Wei Han‐Xun , Dufour Marine , Farina Vittorio , Senanayake Chris H. 
Published: October 2006

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, please click on HTML or PDF.
An Efficient and Convenient Method for Synthesis of 1‐Substituted Imidazoles.
Authors: Lin Chun Min , Wong Fung Fuh , Huang Jiann‐Jyh , Yeh Mou‐Yung 
Published: October 2006

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, please click on HTML or PDF.
Synthesis and Characterization of New Isoxazoles Derived from Benzosuberones.
Authors: Peesapati Venkateswarlu , Bathini Srinivas 
Published: October 2006

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, please click on HTML or PDF.
Novel, Potent, Selective, and Orally Bioavailable Human βII‐Tryptase Inhibitors.
Authors: Sperandio David , et al. et al. 
Published: October 2006

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, please click on HTML or PDF.
New Cycloaddition Reactions of Perfluoro‐1,3,4‐oxadiazoles
Authors: Vasil'ev Nikolai V. , Romanov Dmitrii V. , Truskanova Tatyana D. , Lyssenko Konstantin A. , Zatonsky Georgy V. 
Published: October 2006

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, please click on HTML or PDF.
Radical‐Promoted Cyclizations of Aromatic Carbonyl Compounds to Benzopyrans Using Titanocene(III) Chloride.
Authors: Jana Samaresh , Roy Subhas Chandra 
Published: October 2006

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, please click on HTML or PDF.
Synthesis of Some Novel Ethyl 5‐Methyl‐6‐cyano‐7‐substituted‐2‐oxo‐2H‐pyrano [2,3‐b]pyridine‐3‐carboxylate Derivatives.
Authors: Kumar N. Vasanth , Mashelker Uday C. 
Published: October 2006

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, please click on HTML or PDF.
Phenylboronic Acid as a Mild and Efficient Catalyst for Biginelli Reaction.
Authors: Debache Abdelmadjid , Boumoud Boudjemaa , Amimour Mouna , Belfaitah Ali , Rhouati Salah , Carboni Bertrand 
Published: October 2006

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, please click on HTML or PDF.
Synthesis of 1,2‐Dihydro‐4H‐3,1‐benzoxazine Derivatives via ZnCl2‐Catalyzed Cyclocondensation Reaction.
Authors: Ma Shuling , Li Jiarong , Sun Yongjiang , Zhao Jianmin , Zhao Xiaofan , Yang Xiquan , Zhang Lijun , Wang Lijun , Zhou Zhiming 
Published: October 2006

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, please click on HTML or PDF.
Synthesis of Substituted 2,3,5,6,7,8‐Hexahydropyrazolo[4,3‐d][1,2]diazepine‐8‐carboxylates.
Authors: Bevk David , Groselj Uros , Meden Anton , Svete Jurij , Stanovnik Branko 
Published: October 2006

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, please click on HTML or PDF.
Hypervalent Organoantimony Compound 12‐Aryltetrahydrodibenz[c,f][1,5]azastibocine: New Transmetalating Agent for Palladium‐Catalyzed Arylation of Organic Halides.
Authors: Kakusawa Naoki , Kurita Jyoji 
Published: October 2006

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, please click on HTML or PDF.
Rhodium‐Catalyzed Enantioselective Hydrogenation of β‐Phthalimide Acrylates to Synthesis of β2‐Amino Acids.
Authors: Huang Hanmin , Liu Xiongcai , Deng Jun , Qiu Min , Zheng Zhuo 
Published: October 2006

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, please click on HTML or PDF.
Selective Introduction of a Fluorine Atom into Carbohydrates and a Nucleoside by Ring‐Opening Fluorination Reaction of Epoxides
Authors: Akiyama Yuriko , Hiramatsu Chiharu , Fukuhara Tsuyoshi , Hara Shoji 
Published: October 2006

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, please click on HTML or PDF.
Formation and Reactivity of Novel Pyranosidic Nicholas Oxocarbenium Ions: Access to C‐Ketosides and Branched‐Chain C‐Ketosides.
Authors: Gomez Ana M. , Uriel Clara , Valverde Serafin , Lopez J. Cristobal 
Published: October 2006

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, please click on HTML or PDF.
Synthesis of Pyrroloisoquinolines from Papaverine
Authors: Krivorotov D. V. , Vorob'ev M. V. , Polukeev V. A. , Glibin E. N. 
Published: October 2006

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, please click on HTML or PDF.
Total Synthesis of (R)‐(+)‐Goniothalamin and (R)‐(+)‐Goniothalamin Oxide: First Application of the Sulfoxide‐Modified Julia Olefination in Total Synthesis.
Authors: Pospisil Jiri , Marko Istvan E. 
Published: October 2006

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, please click on HTML or PDF.
Heterocyclic Analogues of Prostaglandins. Part 3. Synthesis of 10‐Oxa‐13‐aza (X), 11‐Oxa‐13‐aza (VIIa) ‐ (VIIc), and 9‐Oxa‐7‐aza Prostanoids (VIId) from 3‐Acyl‐ and 3‐(3‐Arylprop‐2‐enoyl)furan‐2,4‐diones.
Authors: Pashkovskii F. S. , Shchukina E. M. , Gribovskii M. G. , Lakhvich F. A. 
Published: October 2006

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, please click on HTML or PDF.
Synthesis of Novel Substituted/Unsubstituted‐ (2,8‐bis‐trifluoromethyl‐quinolin‐4‐yloxy)‐acetic Acid: Derivatives of Cephalosporin and Their Antibacterial Activity.
Authors: Singh Santosh Kumar , Nahta Ajay , Tiwari R. P. , Jain Praveen 
Published: October 2006

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, please click on HTML or PDF.
Oxazinins from Toxic Mussels: Isolation of a Novel Oxazinin and Reassignment of the C‐2 Configuration of Oxazinin‐1 and ‐2 on the Basis of Synthetic Models.
Authors: Ciminiello Patrizia , Dell'Aversano Carmela , Fattorusso Ernesto , Forino Martino , Magno Silvana , Santelia Federico Umberto , Moutsos Vassilios I. , Pitsinos Emmanuel N. , Couladouros Elias A. 
Published: October 2006

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, please click on HTML or PDF.
Melophlins P, Q, R, and S: Four New Tetramic Acid Derivatives, from Two Palauan Marine Sponges of the Genus Melophlus.
Authors: Xu Jinzhong , Hasegawa Masateru , Harada Ken‐ichi , Kobayashi Hisayoshi , Nagai Hiroshi , Namikoshi Michio 
Published: October 2006

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, please click on HTML or PDF.
Biomimetic Synthesis of Marine Sponge Metabolite Spiculoic Acid A and Establishment of the Absolute Configuration of the Natural Product.
Authors: Kirkham James E. D. , Lee Victor , Baldwin Jack E. 
Published: October 2006

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, please click on HTML or PDF.
Topologically Novel Multiple Rotaxanes and Catenanes Based on Tetraurea Calix[4]arenes
Authors: Bogdan Anca , Rudzevich Yuliya , Vysotsky Myroslav O. , Boehmer Volker 
Published: October 2006

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, please click on HTML or PDF.
Combining Enabling Techniques in Organic Synthesis: Continuous Flow Processes with Heterogenized Catalysts
Authors: Kirschning Andreas , Solodenko Wladimir , Mennecke Klaas 
Published: October 2006

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, please click on HTML or PDF.
Antibacterial Natural Products in Medicinal Chemistry — Exodus or Revival?
Authors: von Nussbaum Franz , Brands Michael , Hinzen Berthold , Weigand Stefan , Haebich Dieter 
Published: October 2006

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, please click on HTML or PDF.
Creation of Low Toxic Reverse‐Transcriptase Inhibitory Nucleosides that Prevent the Emergence of Drug‐Resistant HIV Variants
Authors: Ohrui Hiroshi , Hayakawa Hiroyuki , Kohgo Satoru , Matsuoka Masao , Kodama Eiichi , Mitsuya Hiroaki 
Published: October 2006

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, please click on HTML or PDF.
Preparation of Sixteen 3‐Hydroxy‐4‐ and 7‐Hydroxy‐1‐hydrindanones and 3‐Hydroxy‐4‐ and 8‐Hydroxy‐1‐hydroazulenones
Authors: Tsantali Georgia G. , Dimtsas John , Tsoleridis Constantinos A. , Takakis Ioannis M. 
Published: October 2006

Abstract3‐Hydroxyoctahydro‐4H‐inden‐4‐ones and 7‐hydroxyoctahydro‐1H‐inden‐1‐ones (1, 2 and 3, 4, respectively), as well as the homologous 3‐hydroxyoctahydro‐4(1H)‐azulenones (5, 6) and 8‐hydroxyoctahydro‐1(2H)‐azulenones (7, 8), were prepared diastereoselectively either from the precursor α,β‐enones 9, 10, 11, and 12 or by an isoxazoline method. Unmasking of the isoxazolines 13i, 14i, and 14j with O3 proved a more stereoselective process than hydrogenolysis. In many cases epimerization with 100 % completeness was observed on passing the epimerizable diastereomers once through a column filled with silica gel, the trans‐fused hydrindanones thus in most cases furnishing the cis‐fused epimers and the cis‐fused hydroazulenones the trans forms. These results have been corroborated by AM1 theoretical computations, which indicate that the cis‐fused epimers in these hydrindanone systems are more stable than the trans‐fused variants, whereas the reverse was calculated for the hydroazulenone homologues. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Capillary electrochromatography‐mass spectrometry of cationic surfactants
Authors: Norton Dean , Rizvi Syed Asad Ali , Shamsi Shahab A. 
Published: October 2006

AbstractThe CEC‐MS of alkyltrimethylammonium (ATMA+) ions with chain lengths ranging from C1–C18 is optimized using an internally tapered column packed with mixed mode reversed phase/strong cation exchange stationary phase. A systematic study of the CEC separation parameters is conducted followed by evaluation of the ESI‐MS sheath liquid and spray chamber settings. First, the optimization of CEC separation parameters are performed including the ACN concentration, triethylamine (TEA) content, buffer pH and ammonium acetate concentration. Using 90% v/v ACN with 0.04% v/v TEA as mobile phase, the separation of longer chain C6–C18‐TMA+ surfactants could be achieved in 15 min. Lowering the ACN concentration to 70% v/v provided resolution of shorter chain C1, C2‐TMA+ from C6‐TMA+ although the total analysis time increased to 40 min. Furthermore, variation of both the ACN and TEA content as well as ionic strength has found to significantly influence the retention of longer chain surfactants as compared to shorter chains. The optimum CEC conditions are 70% v/v ACN, 0.04% v/v TEA, pH 3.0 and 15 mM ammonium acetate. Next, the optimization of the ESI‐MS sheath liquid composition is conducted comparing methanol to isopropanol followed by the use of experimental design for analysis of spray chamber parameters. Overall, the developed CEC‐ESI‐MS method allows quantitative and sensitive monitoring of ATMA+ from ≤10 μg/mL down to 10 ng/mL. Utilizing the optimized CEC‐ESI‐MS protocol, the challenging analysis of commercial sample Arquad S‐50 ATMA+ containing cis‐trans unsaturated and saturated soyabean fatty acid derivatives is demonstrated.
Electrophoretic mobility shift assay on poly(ethylene glycol)‐modified glass microchips for the study of estrogen responsive element binding
Authors: Chuang Yen‐Jun , Huang Jia‐Wei , Makamba Honest , Tsai Mei‐Ling , Li Chun‐Wei , Chen Shu‐Hui 
Published: October 2006

AbstractThe binding of estrogen receptor (ER) to estrogen response element (ERE) is essential for genomic pathways of estrogens and gel‐based electrophoretic mobility shift assay (EMSA) is commonly used for analyzing ERE binding. Gel‐based EMSA, however, requires the use of hazard radio isotopes and they are slow, labor‐intensive and difficult to quantify. Here, we present quantitative affinity assays based on microchip electrophoresis using PEG‐modified glass microchannels, which bear neutral surfaces against the adsorption of acidic DNA molecules and basic ER proteins. We first demonstrated the feasibility of the method by measuring binding constants of recombinant ERα and ERβ with a consensus ERE sequence (cERE, 5'‐GGTCAGAGTGACC‐3') as well as with an ERE‐like sequence (ERE 1576, 5'‐GACCGGTCAGCGGACTCAC‐3'). Changes in mobility as a function of protein‐DNA molar ratios were plotted and the dissociation constants were determined based on non‐linear curve fitting. The minimum amount of ER proteins required for one assay was around 0.2 ng and the run time for one chip analysis was less than 2 min. We further measured the estrogenic compound‐mediated dissociation constants with recombinant ER proteins as well as with the extracted ERβ from treated and untreated A549 bronchioloalveolar carcinoma cells. Dissociation constants determined by this method agree with the fact that agonist compounds such as 17β‐estradiol (1.70 nM), diethylstilbestrol (0.14 nM), and genistein (0.80 nM) assist ERE binding by decreasing the constants; while antagonist compounds such as testosterone (140.4 nM) and 4‐hydroxytamoxifen (10.5 nM) suppress the binding by increasing the dissociation constant.
Simvastatin regulates oligodendroglial process dynamics and survival
Authors: Miron Veronique E. , Rajasekharan Sathyanath , Jarjour Andrew A. , Zamvil Scott S. , Kennedy Timothy E. , Antel Jack P. 
Published: October 2006

AbstractSimvastatin, a lipophilic statin that crosses the blood‐brain barrier, is being evaluated as a potential therapy for multiple sclerosis (MS) due to its anti‐inflammatory properties. We assessed the effects of simvastatin on cultures of rat newborn and human fetal oligodendrocyte progenitor cells (OPCs) and human adult mature oligodendrocytes (OLGs) with respect to cellular events pertaining to myelin maintenance and repair. Short‐term simvastatin treatment of OPCs (1 day) induced robust process extension, enhanced differentiation to a mature phenotype, and decreased spontaneous migration. These effects were reversed by isoprenoid products and mimicked with an inhibitor of Rho kinase (ROCK), the downstream effector of the isoprenylated protein RhoA GTPase. Prolonged treatment (2 days) caused process retraction that was rescued by cholesterol, and increased cell death (4 days) partially rescued by either cholesterol or isoprenoid co‐treatment. In comparison, simvastatin treatment of human mature OLGs required a longer initial time course (2 days) to induce significant process outgrowth, mimicked by inhibiting ROCK. Prolonged treatment of mature OLGs was associated with process retraction (6 days) and increased cell death (8 days). Human‐derived OPCs and mature OLGs demonstrated an increased sensitivity to simvastatin relative to the rodent cells, responding to nanomolar versus micromolar concentrations. Our findings indicate the importance of considering the short‐ and long‐term effects of systemic immunomodulatory therapies on neural cells affected by the MS disease process. © 2006 Wiley‐Liss, Inc.
Effect of photoactivation protocol and radiant exposure on monomer conversion and flexural strength of a resin composite after water and ethanol storage
Authors: Gonçalves F. , Calheiros F. C. , Witzel M. F. , Kawano Y. , Braga R. R. 
Published: October 2006

AbstractThe use of soft‐start photoactivation to reduce shrinkage stress has become widespread in restorative dentistry. However, an increased susceptibility to ethanol degradation of polymers formed by pulse‐delay photoactivation was reported. It was hypothesized that reductions in flexural strength after ethanol storage were related not only to low curing rates, but also to the radiant exposure employed. A commercial composite was subjected to different curing protocols (continuous at high irradiance, continuous at low irradiance, and pulse‐delay) and radiant exposures (6, 12, and 24 J/cm2). After 48 h, differences in degree of conversion were minimal and no differences in strength were detected among specimens stored in water. Ethanol storage caused significant strength reductions in pulse‐delay and low irradiance specimens that received 6 J/cm2. The results suggest that when low irradiances or pulse‐delay methods are used, a relatively high radiant exposure is necessary to originate a polymer network structure similar to that obtained by continuous high irradiance photoactivation. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2006
Controlling diffusion of 3He by buffer gases: A structural contrast agent in lung MRI
Authors: Acosta Rodolfo H. , Blümler Peter , Agulles‐Pedrós Luis , Morbach Andreas E. , Schmiedeskamp Jörg , Herweling Annette , Wolf Ursula , Scholz Alexander , Schreiber Wolfgang G. , Heil Werner , Thelen Manfred , Spiess Hans‐Wolfgang 
Published: October 2006

AbstractPurposeTo study the influence of admixing inert buffer gases to laser‐polarized 3He in terms of resulting diffusion coefficients and the consequences for image contrast and resolution.Materials and MethodsThe diffusion coefficient of 3He was altered by admixing buffer gases of various molecular weights (4He, N2, and SF6). The influence of the pulse sequence and the diffusion coefficient on the appearance of MRI of (laser‐polarized) gases was analyzed by comparison of basic theoretical concepts with demonstrative experiments.ResultsExcellent agreement between theoretical description and observed signal in simple gradient echoes was observed. A maximum signal gain can be predicted and was experimentally validated. Images acquired under such conditions revealed improved resolution. The nature and concentration of the admixed gas defines a structural threshold for the observed apparent diffusion coefficient (ADC) as demonstrated with diffusion‐weighted MRI on a pig's lung flooded with suitable gas mixtures.ConclusionA novel procedure is proposed to control the diffusion coefficient of gases in MRI by admixture of inert buffer gases. Their molecular mass and concentration enter as additional parameters into the equations that describe structural contrast. This allows for setting a structural threshold up to which structures contribute to the image. For MRI of the lung this enables images of very small structural elements (alveoli) only, or in the other extreme, all airways can be displayed with minimal signal loss due to diffusion. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.
Raman spectroscopic study of oxidation and phase transition in W18O49 nanowires
Authors: Lu D. Y. , Chen J. , Zhou J. , Deng S. Z. , Xu N. S. , Xu J. B. 
Published: October 2006

AbstractW18O49 nanowires were synthesized by a high‐temperature physical evaporation technique. The structure, morphology, and composition of the nanowires were characterized by SEM, EMPA, XRD, XPS, and HRTEM techniques. The intrinsic Raman spectrum of W18O49 nanowires was obtained, and the effect of laser power on the change of their structure was also studied. W18O49 nanowires were first oxidized to tungsten trioxide nanowires under irradiation of a certain laser power, and then the tungsten trioxide nanowires underwent a phase transition from monoclinic to orthorhombic with increasing laser power; this phase transition was reversible on turning down the laser power. Copyright © 2006 John Wiley & Sons, Ltd.