bluuebunny/crossref_metadata_2025 huggingface dataset:
Rationale and design of the ARCUS: Effects of trAnsRadial perCUtaneouS coronary intervention on upper extremity function
Authors: Zwaan Eva M. , IJsselmuiden Alexander J.J. , van Rosmalen Joost , van Geuns Robert‐Jan M. , Amoroso Giovanni , Moerman Esther , Ritt Marco J.P.F. , Schreuders Ton A.R. , Kofflard Marcel J.M. , Holtzer Carlo A.J.
Published: April 2016

Objective

The aim of this study is to provide a complete insight in the access‐site morbidity and upper extremity function after Transradial Percutaneous Coronary Intervention (TR‐PCI).

Background

In percutaneous coronary intervention the Transradial Approach (TRA) is gaining popularity as a default technique. It is a very promising technique with respect to post‐procedure complications, but the exact effects of TRA on upper extremity function are unknown.

Methods and results

The effects of trAnsRadial perCUtaneouS coronary intervention on upper extremity function (ARCUS) trial is a multicenter prospective cohort study that will be conducted in all patients admitted for TR‐PCI. Clinical outcomes will be monitored during a follow‐up of 6 months, with its primary endpoint at two weeks of follow‐up. To investigate the complete upper extremity function, a combination of physical examinations and validated questionnaires will be used to provide information on anatomical integrity, strength, range of motion (ROM), coordination, sensibility, pain, and functioning in everyday life. Procedural and material specifications will be registered in order to include all possible aspects influencing upper extremity function.

Conclusions

Results from this study will elucidate the effect of TR‐PCI on upper extremity function. This creates the opportunity to further optimize TR‐PCI, to make improvements in functional outcome and to prevent morbidity regarding full upper extremity function. © 2016 Wiley Periodicals, Inc.
Predicting long‐term bleeding after percutaneous coronary intervention
Authors: Sharma Praneet K. , Chhatriwalla Adnan K. , Cohen David J. , Jang Jae‐Sik , Baweja Paramdeep , Gosch Kensey , Jones Philip , Bach Richard G. , Arnold Suzanne V. , Spertus John A.
Published: April 2016

Objectives

To construct a model to predict long‐term bleeding events following percutaneous coronary intervention (PCI).

Background

Treatment with dual antiplatelet therapy following PCI involves balancing the benefits of preventing ischemic events with the risks of bleeding. There are no models to predict long‐term bleeding events after PCI.

Methods

We analyzed 1‐year bleeding outcomes from 3,128 PCI procedures in the Patient Risk Information Services Manager (PRISM) observational study. Patient‐reported bleeding events were categorized according to Bleeding Academic Research Consortium (BARC) definitions. Logistic regression analysis was used to develop a model predicting BARC ≥ 1 bleeding.

Results

BARC 0, 1, 2 or 3 bleeding was observed in 574 (18.4%); 2382 (76.2%); 114 (3.6%); and 58 (1.8%) patients, respectively. Compared to patients who had no bleeding, patients with BARC ≥ 1 bleeding were more often female (30 vs. 23%), Caucasian (94 vs. 83%), had a higher incidence of drug eluting stent (DES) implantation (83 vs. 76%) and warfarin therapy (7.4 vs. 3.9%), and a lower incidence of diabetes (31 vs. 45%; P‐value <0.01 for all comparisons). A 27‐variable model had moderate discrimination (c‐statistic of 0.674), and good calibration, as did a parsimonious model with 10 variables (c‐statistic = 0.667). This model performed well in predicting BARC ≥ 2 bleeding events as well (c‐statistic = 0.653).

Conclusions

Bleeding is common in the first year after PCI, and can be predicted by pre‐procedural patient characteristics and use of DES. Objective estimates of bleeding risk may help support shared decision‐making with respect to stent selection and duration of antiplatelet therapy following PCI. © 2016 Wiley Periodicals, Inc.
Paraffin Oil Emulsions for the Absorption of Toluene Gas
Authors: Qi Min , Wu Xiankun , Zhang Feng , Zhang Juan , Wang Yueyang , Zhang Zhibing , Chen Qiang
Published: April 2016

Water‐in‐oil‐in‐water (W/O/W) and water‐in‐oil (W/O) emulsions of paraffin oil were prepared with sorbitan monooleate (Span 80)/polyoxyethylene sorbitan monooleate (Tween 80) or polyethylene glycol monostearate (SG‐6), respectively. The physical characteristics and the absorption of toluene gas in these emulsions were investigated to evaluate the influence of the emulsifier dosage and the oil/water ratio. Both investigated W/O/W emulsions provided high stabilities and low viscosities. The absorption of toluene gas was excellent, with little foam occurring during the absorption. Although the W/O emulsions with 2–5 % SG‐6 were of high stability, their high viscosities strongly limited their application as volatile organic compound absorbents. Stable emulsions consisted of small and uniform droplets and some emulsions underwent mild demulsification after the absorption.
Generation of Two‐Phase Air‐Water Flow with Fine Microbubbles
Authors: Levitsky Inna , Tavor Dorith , Gitis Vitaly
Published: April 2016

Aiming at the development of a low‐cost technology for multipurpose water and surface treatment in the chemical industry and beyond, using microbubbles, a novel scheme of liquid‐gas interaction within a specially designed bubble generator was tested. Its efficiency for the production of microbubbles with a size distribution in the micron range is confirmed. The basic element of the device is a vortex chamber with water supply through tangential ducts, while the gas (air) is introduced in a highly turbulent swirling flow of water in radial direction through the orifice in the gas supply duct, located on the chamber axis. Bubble diameters, bubble velocities in the pipe flow and effect of the output pressure on the bubble size distribution were studied.
Encapsulation of Agents inside Crystals as Liquid Inclusions
Authors: Seidel Julia , Ulrich Joachim
Published: April 2016

There are many approaches to the issue of agent encapsulation as a method to protect sensitive substances against outer influences. The possibility of the use of inclusion‐containing crystals as encapsulation material was investigated. Since many products are water‐based media, the low‐water‐soluble substance salicylic acid (SA) was chosen to investigate its qualities as a container substance. Therefore, the solubility of SA was investigated in dependence on the proportions of the antisolvent water and the solvent ethanol by means of a ternary phase diagram. Moreover, SA container crystals were generated and filled by means of an antisolvent crystallization method. In two case studies, copper sulfate and ascorbic acid could successfully be encapsulated.
High‐Performance Low‐Temperature Li+ Intercalation in Disordered Rock‐Salt Li–Cr–V Oxyfluorides
Authors: Chen Ruiyong , Ren Shuhua , Mu Xiaoke , Maawad Emad , Zander Stefan , Hempelmann Rolf , Hahn Horst
Published: April 2016

At −10 °C and 26 mA g−1, Li2Cr0.2V0.8O2F can deliver a stable high capacity of 250 mAh g−1 (or 690 Wh kg−1) over 60 cycles. Even at −20 °C and a current density of 106 mA g−1, it still delivers a steady capacity and specific energy of about 160 mAh g−1 and 400 Wh kg−1, respectively, over 100 cycles. Superior performance of Li2Cr0.2V0.8O2F over Li2VO2F and Li2CrO2F is related to its structural stability and electronic properties.
CO2 Electroreduction with Enhanced Ethylene and Ethanol Selectivity by Nanostructuring Polycrystalline Copper
Authors: Kwon Youngkook , Lum Yanwei , Clark Ezra L. , Ager Joel W. , Bell Alexis T.
Published: April 2016

There are a number of recent reports on the use of oxidation/reduction cycling of Cu surfaces to improve their selectivity for ethylene formation in the aqueous CO2 reduction reaction. Here, the oxidation/reduction process is examined in detail. It is found that the faradaic efficiencies for both ethylene and ethanol are enhanced after oxidation/reduction cycling in the presence of halide anions. Specifically, cycling of the electrode in the presence of chloride, bromide, or fluoride anions allows for an ethylene faradaic efficiency of approximately 15.2 %, a factor of 1.5 higher than that for polycrystalline copper (at −1.0 V vs. RHE). The faradaic efficiency for ethanol is also enhanced from 2.65 to approximately 7.6 %. The effects of electrochemical oxidation/reduction with the chloride anion were investigated by using in situ Raman spectroscopy, and the changes in the surface morphology of copper were monitored by using SEM. Consistent with prior reports, it is observed that during the oxidation part of the cycle, anodic corrosion forms a Cu2O layer, which consists of cubical crystals of about 150 nm. During the reduction sweep, it is converted to metallic copper, which forms irregular Cu nanoparticles of around 20 nm in diameter. The enhancement in ethylene formation is presumably attributed to the formation of grain boundaries, which may serve as active sites.
Selective and High‐Yield Synthesis of Oblate Superatom [PdAu8(PPh3)8]2+
Authors: Matsuo Shota , Takano Shinjiro , Yamazoe Seiji , Koyasu Kiichirou , Tsukuda Tatsuya
Published: April 2016

We report herein a selective and high‐yield synthesis of [PdAu8(PPh3)8]Cl2 through kinetic control over the co‐reduction of AuCl(PPh3) and Pd(PPh3)4 and post‐synthesis annealing. Single‐crystal X‐ray diffraction confirmed that the PdAu8 core has a centered‐crown motif with the Pd atom located at the center. The energy gap between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) was determined to be 1.66 eV by using electrochemical measurements. Density functional theory calculations showed that both the HOMO and LUMO are assigned to 1P superatomic orbitals, and that the PdAu82+ core can be viewed as an oblate superatom with an electronic configuration of (1S)2(1P)4. The optical gap (1.95 eV) was larger than the electrochemical HOMO–LUMO energy gap, because electronic transition from the HOMO to the LUMO is optically forbidden.
Carbocations Confined in a Thiatriazuliporphyrin Frame
Authors: Sprutta Natasza , Wełnic Monika , Białek Michał J. , Lis Tadeusz , Szterenberg Ludmiła , Latos‐Grażyński Lechosław
Published: April 2016

In the search for tricarbaporphyrinoids, a three‐component acid‐catalyzed condensation of azulene, 2,5‐bis[(p‐tolyl)hydroxymethyl]thiophene, and an aryl aldehyde has been elaborated, affording the appropriate thiatriazuliporphyrinogens. The subsequent oxidation yielded a rare example of a macrocyclic organic tetracation, which can be readily and reversibly converted into macrocyclic tri‐ and dicarbocations by addition of one or two hydroxides bound at the meso position(s). Further insight into the influence of carbocation formation on the geometry, electronic structure, and magnetic manifestation in 1H NMR spectroscopy has been obtained by using density functional theory calculations. The charge distribution was evaluated by mapping electron density surfaces with electrostatic potential (ESP).
Study of the Discrepancies between Crystallographic Porosity and Guest Access into Cadmium–Imidazolate Frameworks and Tunable Luminescence Properties by Incorporation of Lanthanides
Authors: Mondal Suvendu Sekhar , Bhunia Asamanjoy , Attallah Ahmed G. , Matthes Philipp R. , Kelling Alexandra , Schilde Uwe , Müller‐Buschbaum Klaus , Krause‐Rehberg Reinhard , Janiak Christoph , Holdt Hans‐Jürgen
Published: April 2016

An extended member of the isoreticular family of metal–imidazolate framework structures, IFP‐6 (IFP=imidazolate framework Potsdam), based on cadmium metal and an in situ functionalized 2‐methylimidazolate‐4‐amide‐5‐imidate linker is reported. A porous 3D framework with 1D hexagonal channels with accessible pore windows of 0.52 nm has been synthesized by using an ionic liquid (IL) linker precursor. IFP‐6 shows significant gas uptake capacity only for CO2 and CH4 at elevated pressure, whereas it does not adsorb N2, H2, and CH4 under atmospheric conditions. IFP‐6 is assumed to deteriorate at the outside of the material during the activation process. This closing of the metal–organic framework (MOF) pores is proven by positron annihilation lifetime spectroscopy (PALS), which revealed inherent crystal defects. PALS results support the conservation of the inner pores of IFP‐6. IFP‐6 has also been successfully loaded with luminescent trivalent lanthanide ions (LnIII=Tb, Eu, and Sm) in a bottom‐up one‐pot reaction through the in situ generation of the linker ligand and in situ incorporation of photoluminescent Ln ions into the constituting network. The results of photoluminescence investigations and powder XRD provide evidence that the Ln ions are not doped as connectivity centers into the frameworks, but are instead located within the pores of the MOFs. Under UV light irradiation, Tb@IFP‐6 and Eu@IFP‐6 (λexc=365 nm) exhibit observable emission changes to a greenish and reddish color, respectively, as a result of strong Ln 4 f emissions.
Synthesis and Biological Evaluation of Novobiocin Core Analogues as Hsp90 Inhibitors
Authors: Byrd Katherine M. , Subramanian Chitra , Sanchez Jacqueline , Motiwala Hashim F. , Liu Weiya , Cohen Mark S. , Holzbeierlein Jeffrey , Blagg Brian S. J.
Published: April 2016

Development of heat shock protein 90 (Hsp90) C‐terminal inhibitors has emerged as an exciting strategy for the treatment of cancer. Previous efforts have focused on modifications to the natural products novobiocin and coumermycin. Moreover, variations in both the sugar and amide moieties have been extensively studied, whereas replacements for the coumarin core have received less attention. Herein, 24 cores were synthesized with varying distances and angles between the sugar and amide moieties. Compounds that exhibited good anti‐proliferative activity against multiple cancer cell lines and Hsp90 inhibitory activity, were those that placed the sugar and amide moieties between 7.7 and 12.1 Å apart along with angles of 180°.
Photoorganocatalytic One‐Pot Synthesis of Hydroxamic Acids from Aldehydes
Authors: Papadopoulos Giorgos N. , Kokotos Christoforos G.
Published: April 2016

An efficient one‐pot synthesis of hydroxamic acids from aldehydes and hydroxylamine is described. A fast, visible‐light‐mediated metal‐free hydroacylation of dialkyl azodicarboxylates was used to develop the subsequent addition of hydroxylamine hydrochloride. A range of aliphatic and aromatic aldehydes were employed in this reaction to give hydroxamic acids in high to excellent yields. Application of the current methodology was demonstrated in the synthesis of the anticancer medicine vorinostat.
Controlled Variable Oxidative Doping of Individual Organometallic Nanoparticles
Authors: Feng Ann , Cheng Wei , Holter Jennifer , Young Neil , Compton Richard G.
Published: April 2016

The charging and controlled oxidative doping of single organometallic ferrocene nanoparticles is reported in aqueous sodium tetrafluoroborate using the nano‐impacts method. It is shown that ferrocene nanoparticles of approximately 105 nm diameter are essentially quantitatively oxidatively doped with the uptake of one tetrafluoroborate anion per ferrocene molecule at suitably high overpotentials. By using lower potentials, it is possible to achieve low doping levels of single nanoparticles in a controlled manner.
Helical, Axial, and Central Chirality Combined in a Single Cage: Synthesis, Absolute Configuration, and Recognition Properties
Authors: Zhang Dawei , Mulatier Jean‐Christophe , Cochrane James Robert , Guy Laure , Gao Guohua , Dutasta Jean‐Pierre , Martinez Alexandre
Published: April 2016

The synthesis of eight enantiopure molecular cages (four diastereomeric pairs of enantiomers) comprising a helically chiral cyclotriveratrylene (CTV) unit, three axially chiral binaphthol linkages, and three centrally asymmetric carbon atoms of a trialkanolamine core, is described. These new cages constitute a novel family of hemicryptophanes, which combine three classes of chirality. Their absolute configuration was successfully assigned by a chemical correlation method to overcome the signals overlap in the ECD spectra of the binaphtol and CTV units. Stereoselective recognition of glucose and mannose derivatives was investigated with these new chiral cages. Excellent enantio‐ and diastereoselectivity were reached, since in some cases, both exclusive enantio‐ and diastereo‐discrimination have been observed. In addition, compared with the most relevant hemicryptophanes, these new cages also exhibit improved binding affinities.
Dissolving Hydroxyolite: A DNA Molecule into Its Hydroxyapatite Mold
Authors: Bertran Oscar , Revilla‐López Guillermo , Casanovas Jordi , del Valle Luis J. , Turon Pau , Puiggalí Jordi , Alemán Carlos
Published: April 2016

In spite of the clinical importance of hydroxyapatite (HAp), the mechanism that controls its dissolution in acidic environments remains unclear. Knowledge of such a process is highly desirable to provide better understanding of different pathologies, as for example osteoporosis, and of the HAp potential as vehicle for gene delivery to replace damaged DNA. In this work, the mechanism of dissolution in acid conditions of HAp nanoparticles encapsulating double‐stranded DNA has been investigated at the atomistic level using computer simulations. For this purpose, four consecutive (multi‐step) molecular dynamics simulations, involving different temperatures and proton transfer processes, have been carried out. Results are consistent with a polynuclear decalcification mechanism in which proton transfer processes, from the surface to the internal regions of the particle, play a crucial role. In addition, the DNA remains protected by the mineral mold and transferred proton from both temperature and chemicals. These results, which indicate that biomineralization imparts very effective protection to DNA, also have important implications in other biomedical fields, as for example in the design of artificial bones or in the fight against osteoporosis by promoting the fixation of Ca2+ ions.
Ultrafast Preparation of Black Phosphorus Quantum Dots for Efficient Humidity Sensing
Authors: Zhu Chongyang , Xu Feng , Zhang Ling , Li Minli , Chen Jing , Xu Shuhong , Huang Guangguang , Chen Wenhao , Sun Litao
Published: April 2016

Black phosphorus quantum dots (BPQDs) have been prepared by a high turbulent shear rate generated from a household kitchen blender. A layer‐by‐layer disintegration mechanism of bulk BP crystals is suggested. As‐synthesized BPQDs have shown excellent humidity sensing and photothermal converting properties. Importantly, this work not only explores potential applications for the BPQDs but also provides a successful paradigm for preparing the QDs of other layered materials.
Synthesis of Indolophanes by Photochemical Macrocyclization
Authors: Pfaffenbach Magnus , Roller Alexander , Gaich Tanja
Published: April 2016

Herein, we report the synthetically practical, short, and general access to novel indolophane architectures by means of a photochemical C−H activation process—the Witkop cyclization. These highly strained scaffolds were obtained by photoinduced ring closure and feature atropisomerism as well as aromatic ring current effects, which both have been investigated. The prevailing regioselectivity of theWitkop cyclization reaction was completely reversed by the presence of a quaternary carbon center, exerting a strong Thorpe–Ingold effect on the system for which experimental‐evidence is provided.
Gadolinium‐Decorated Silica Microspheres as Redox‐Responsive MRI Probes for Applications in Cell Therapy Follow‐Up
Authors: Muñoz Úbeda Monica , Carniato Fabio , Catanzaro Valeria , Padovan Sergio , Grange Cristina , Porta Stefano , Carrera Carla , Tei Lorenzo , Digilio Giuseppe
Published: April 2016

The redox microenvironment within a cell graft can be considered as an indicator to assess whether the graft is metabolically active or hypoxic. We present a redox‐responsive MRI probe based on porous silica microparticles whose surface has been decorated with a Gd‐chelate through a disulphide bridge. Such microparticles are designed to be interspersed with therapeutic cells within a biocompatible hydrogel. The onset of reducing conditions within the hydrogel is paralleled by an increased clearance of Gd, that can be detected by MRI.
Efficient Synthesis of Cyclic Block Copolymers by Rotaxane Protocol by Linear/Cyclic Topology Transformation
Authors: Valentina Stephanie , Ogawa Takahiro , Nakazono Kazuko , Aoki Daisuke , Takata Toshikazu
Published: April 2016

High‐yielding synthesis of cyclic block copolymer (CBC) using the rotaxane protocol by linear‐cyclic polymer topology transformation was first demonstrated. Initial complexation of OH‐terminated sec‐ammonium salt and a crown ether was followed by the successive living ring‐opening polymerizations of two lactones to a linear block copolymer having a rotaxane structure by the final capping of the propagation end. CBC was obtained in a high yield by an exploitation of the mechanical linkage through the translational movement of the rotaxane component to transform polymer structure from linear to cyclic. Furthermore, the change of the polymer topology was translated into a macroscopic change in crystallinity of the block copolymer.
Exploring Cooperative Effects in Oxidative NHC Catalysis: Regioselective Acylation of Carbohydrates
Authors: Cramer David L. , Bera Srikrishna , Studer Armido
Published: April 2016

The utility of oxidative NHC catalysis for both the regioselective and chemoselective functionalization of carbohydrates is explored. Chiral NHCs allow for the highly regioselective oxidative esterification of various carbohydrates using aldehydes as acylation precursors. The transformation was also shown to be amenable to both cis/trans diol isomers, free amino groups, and selective for specific sugar epimers in competition experiments. Efficiency and regioselectivity of the acylation can be improved upon using two different NHC catalysts that act cooperatively. The potential of the method is documented by the regioselective acylation of an amino‐linked neodisaccharide.
ChemInform Abstract: ELECTRON MICROSCOPE INVESTIGATIONS OF THE INITIAL STAGES OF SILVER ELECTRODEPOSITION
Authors: TOSCHEV S. , MILCHEV A. , VASSILEVA E.
Published: April 2016

Die elektronenmikroskopische Untersuchung der Anfangsstadien der Bildung elektrolytischer Ag‐Abscheidungen aus wäßriger AgNO3‐Lösung läßt Schlüsse auf den aktuellen Wachstumsmechanismus der Ag‐Kristallite unter potentiostatischen Bedingungen zu.
ChemInform Abstract: GRAIN‐BOUNDARY SEGREGATION IN MAGNESIUM OXIDE‐DOPED ALUMINUM OXIDE
Authors: TAYLOR R. I. , COAD J. P. , HUGHES A. E.
Published: April 2016

Al2O3 kann zu hohen Dichten gesintert werden, wenn es mit MgO dotiert ist.
ChemInform Abstract: EFFECT OF ATMOSPHERE ON RESISTIVITY OF TUNGSTEN TRIOXIDE CERAMICS
Authors: KANEKI N. , HARA H. , SHIMADA K. , SHIMIZU T.
Published: April 2016

Für dotierte (La2O3, Li2O, V2O5 , Co2O3) WO3‐Keramiken werden die Widerstands‐Temperatur‐Charakteristiken in verschiedenen Atmosphären (Luft, O2, Vakuum und CO) aufgenommen.
ChemInform Abstract: MAGNETIC PROPERTIES OF ANISOTROPIC LEAD FERRITE
Authors: ABRAMS J. C. , MCLAREN M. G.
Published: April 2016

Orientierte gesinterte Preßlinge aus PbO ° 5 Fe2O3 + 0,3% B203 werden hergestellt und grüne sowie Sintervolumendichte, Sintervolumenschwund, Gewichtsverlust, Restinduktion, Sättigungsmagnetisierung, Koerzitivfeldstärke, Eigenkoerzitivfeldstärke und maximales Energieprodukt werden bestimmt.
ChemInform Abstract: THERMODYNAMIC PROPERTIES OF SOLUTIONS OF COPPER SULFATE IN DIETHYLENEGLYCOL AND AQUEOUS DIETHYLENEGLYCOL
Authors: BLOKHRA R. L. , SEHGAL Y. P. , KUTHIALA V. K.
Published: April 2016

Die Aktivitätskoeffizienten von CuSO4 in H2O, Diäthylenglykol (DEG) und in wäßrigen Diäthylenglykollösungen (AQ ° DEG) werden bei 30, 35 und 40°C bei verschiedenen Konzentrationen aus EMK‐Messungen an Ketten des Typs A berechnet.
ChemInform Abstract: STANDARD POTENTIALS OF SILVER‐SILVER BROMIDE ELECTRODE AND RELATED THERMODYNAMIC QUANTITIES IN 2‐PROPANOL‐WATER MIXTURES
Authors: MEKJAVIC I. , TOMINIC I.
Published: April 2016

Die Standardpotentiale werden von Lösungsmittelgemischen mit 30, 50, 70 und 90 Gew. % Propanol‐2 bei Temperaturen von 15, 25, und 35°C mit Ketten des Typs A bestimmt.
ChemInform Abstract: THE ELECTROCHEMICAL OXIDATION OF LEAD TO FORM LEAD SULFATE
Authors: FLEMING A. N. , HARRISON J. A.
Published: April 2016

Die anodische Oxidation von festem Pb in H2SO4 zu PbSO4 wird mit Hilfe rotierender Scheiben‐ , potentiostatischer Impuls‐ und Wechselstromimpedanzmessungen untersucht.
ChemInform Abstract: ELECTROCHEMICAL OXYGEN REDUCTION ON OXIDE CATALYSTS
Authors: BAGOTZKY V. S. , SHUMILOVA N. A. , KHRUSHCHEVA E. I.
Published: April 2016

Kinetik und Mechanismus der elektrochemischen Sauerstoffreduktion an Ni‐ und Co‐oxiden (durch thermische oder elektrochemische Oxidation) sowie die Einflüsse der Katalysatornatur und von adsorbiertem Sauerstoff werden durch potentiodynamische und Ring‐Scheibenelektroden‐Methoden untersucht.
ChemInform Abstract: A METHOD FOR ELIMINATION OF SIDE EFFECTS ON ELECTROCHEMICAL MEASUREMENTS OF SINGLE CRYSTALS. ADDITIONAL TEST OF THE ADSORPTION SYSTEMS SILVER‐LEAD ION AND GOLD‐CUPRIC ION
Authors: DICKERTMANN D. , KOPPITZ F. D. , SCHULTZE J. W.
Published: April 2016

Für elektrochemische Messungen an Einkristallen wird eine einfache Anordnung verwandt, bei der aufgrund der Oberflächenspannung des Elektrolyten nur die orientierte Fläche benetzt wird.
ChemInform Abstract: STUDIES ON THE MECHANISM OF THE HYDROGEN IONIZATION REACTION ON RHODIUM IN ALKALINE SOLUTION BY MEANS OF DEUTERIUM TRACER
Authors: MATSUSHIMA T. , ENYO M.
Published: April 2016

Der Mechanismus der Wasserstoffonisierungsreaktion an einer Rh‐Elektrode in alkalischer Lösung wird durch die Austauschreaktion zwischen D, und H2O für einen weiten Bereich anodischer Polarisation untersucht.
ChemInform Abstract: THE EFFECT OF ELECTRODE ORIENTATION UPON THE ANODIC BEHAVIOR OF THE VITREOUS CARBON‐SODIUM POLYSULFIDE INTERPHASE AT 350°C
Authors: ARMSTRONG R. D. , REID M.
Published: April 2016

Der anodische Bereich der i‐E‐Kurven wird für scheibenförmige, stationäre Arbeitselektroden in senkrecht nach oben und senkrecht nach unten zeigenden Positionen bei 350°C in S‐gesättigten Na2S5‐Schmelzen untersucht.
ChemInform Abstract: GLASS‐METAL REACTION IN AC ELECTRIC FIELD
Authors: KIM C. , TOMOZAWA M.
Published: April 2016

Der Einfluß eines elektrischen Wechselfeldes auf die Reaktionen zwischen Li‐silicat‐Gläsern und Metallelektroden (Au oder Ag; aufgedampft und als Pasteelektroden) wird untersucht.
ChemInform Abstract: A REVERSIBLE OXYGEN ELECTRODE IN AN EQUIMOLAR POTASSIUM NITRATE‐SODIUM NITRATE MELT SATURATED WITH SODIUM PEROXIDE. II. A VOLTAMMETRIC STUDY
Authors: DE JONG J. M. , BROERS G. H.
Published: April 2016

Die voltammetrischen Experimente werden mit rotierenden Pt‐ oder Graphitscheibenelektroden durchgeführt.
ChemInform Abstract: NUCLEATION AND GROWTH OF ANODIC OXIDE FILMS ON BISMUTH. I. CYCLIC VOLTAMMETRY
Authors: WILLIAMS D. E. , WRIGHT G. A.
Published: April 2016

Die frühen Stadien der Bildung einer kontinuierlichen anodischen Oxidschicht auf einer festen Bi‐Elektrode werden im pH‐Bereich 5‐14 untersucht.
ChemInform Abstract: POLAROGRAM AND REACTIONS OF A SHORT‐LIVED OXIDATION PRODUCT OF THE CARBONATE ION
Authors: GRAETZEL M. , HENGLEIN A. , SCHEERER R. , TOFFEL P.
Published: April 2016

Bei der Bestrahlung einer l0‐2 m wäßrigen Na2CO3 ‐Lösung, die mit N2O gesättigt ist, entsteht das Radikalanion CO3‐, das sowohl Akzeptor als auch Donator eines Elektrons sein kann.
ChemInform Abstract: DETERMINATION OF THE ION‐ADSORPTION ON THE SILVER BROMIDE SYSTEMS BY THE RADIOACTIVE TRACER TECHNIQUE
Authors: HUS M. , HERAK M. J.
Published: April 2016

Die Abhängigkeit des Adsorptions‐Desorptions‐Prozesses von Eu3+ an AgBr von der Konzentration und dem Typ ionischer und nichtionischer organischer Moleküle ( ;z.B. ein Octylphenylpolyglykoläther, Myristylaminnitrat, Laurylaminnitrat) und anorganischer Ionen (La(NO3)3, Ba(NO3)2) wird untersucht.
ChemInform Abstract: KINETICS OF THE REACTION OF ATOMIC OXYGEN WITH PHOSPHORUS TRIFLUORIDE. ELECTRON SPIN RESONANCE DETERMINATION
Authors: GOLDBERG I. B. , CROWE H. R.
Published: April 2016

Die Geschwindigkeitskonstante der Reaktion A wird zu 2,28 ‐ l011cm3 mol‐1s‐1 bei 298 K bestimmt.
ChemInform Abstract: CALCULATION OF THE ACTIVATION ENERGY OF SOLID‐STATE REACTIONS USING THE MOESSBAUER EFFECT
Authors: EISSA N. A. , BAHGAT A. A. , MOHAMED A. H. , SALEH S. A.
Published: April 2016

Während der Bildung von ZnFe2O4, NiFe2O4 bzw. CdFe2O4 aus stöchiometrischen Ansätzen von α‐Fe2O3‐Pulver und NiO, ZnO bzw. CdO werden Mößbauer‐Spektren aufgenommen und nach 3 Methoden analysiert.
ChemInform Abstract: KINETIC STUDIES ON THE PRECIPITATION OF HEMATITE FROM IRON‐RICH SPINEL SOLID SOLUTIONS
Authors: YAMAGUCHI T. , KIMURA T.
Published: April 2016

Die kinetischen Untersuchungen werden mit besonderem Augenmerk auf den Einfluß 2wertiger Kationen und der Fe‐oxid‐Konzentration durchgeführt.
ChemInform Abstract: PRODUCTION OF HYDROGEN PEROXIDE BY OXIDATION OF ISOPROPYL ALCOHOL
Authors: PNEVA E. YA.
Published: April 2016

Isopropanol läßt sich bei 115 ‐ 135°C und Drücken von 10 ‐ 12 Bar mit Sauerstoff in Blasensäulen zu Aceton oxidieren unter gleichzeitiger Bildung von Wasserstoffperoxid.
ChemInform Abstract: Über das Diimin und andere Stickstoffwasserstoffe.
Authors: WIBERG N.
Published: April 2016

Durch "unkontrollierte energetische" bzw. "gezielte chemische" Umwandlung von Hydrazin lassen sich neue Stickstoffwasserstoffe herstellen, ein Verfahren, unter das beispielsweise die durch Mikrowellenentladung induzierte Synthese von N3H3, N4H2 und N6H2 fallt.
ChemInform Abstract: A NEW SULFUR‐NITROGEN RING COMPOUND‐ 1,1,3,3‐TETRAOXO‐2,4‐DIFLUOROSULFONYL‐CYCLODIAZA‐Λ6‐THIANE
Authors: SCHMIDT K.‐D. , MEWS R. , GLEMSER O.
Published: April 2016

N‐(Fluorsulfonyl)schwefeloxidimid (I) reagiert mit SO3 über die Zwischenstufen (II) und (III) zur Titelverbindung (IV), deren Zusammensetzung und Struktur durch Elementaranalyse, Massenspektren sowie IR‐ und RA‐Spektren gesichert ist.
ChemInform Abstract: PREPARATION AND X‐RAY CRYSTAL STRUCTURE OF IODOCYCLOHEPTASULFUR HEXAFLUORANTIMONATE(VI), (S7I)+(SBF6)‐
Authors: PASSMORE J. , TAYLOR P. , WHIDDEN T. K. , WHITE P.
Published: April 2016

Aus den Salzen (I) und (II) oder den Fluoriden (IV) und Jod erhält man mit Schwefel die Schwefeljodverbindungen (III).
ChemInform Abstract: MONOCHLORIDES OF LANTHANOIDS‐ GADOLINIUM CHLORIDE AND TERBIUM CHLORIDE
Authors: SIMON A. , MATTAUSCH H. , HOLZER N.
Published: April 2016

Die Darstellung der Titelverbindungen erfolgt durch Erhitzen der Metalle mit ihren Trichloriden auf 800°C. Einkristall und Pulveruntersuchungen zeigen, daß in der Struktur dieser neuartigen Verbindungen alternierend dicht gepackte Doppelschichten aus Metallatomen mit Doppelschichten aus Cl‐Atomen vorliegen.
ChemInform Abstract: THEORY AND APPLICATIONS OF PHOTOELECTRON SPECTROSCOPY. PART 68. THE DOMINANT ROLE OF HYPERCONJUGATION IN THE 9‐OXABICYCLO(4.2.1)NONA‐2,4,7‐TRIENE SERIES
Authors: SCHMIDT H. , SCHWEIG A. , ANASTASSIOU A. G. , WETZEL J. C.
Published: April 2016

9‐Oxa‐bicyclo[4.2.l ]trien‐(2,4,7) (II) wurde durch Desepoxidierung aus (I) dargestellt (zwischenzeitlich verbesserte Methode zur Darstellung von (II) veröffentlicht).
ChemInform Abstract: ELECTRON IMPACT STUDIES. C. DOUBLY CHARGED NEGATIVE IONS
Authors: BOWIE J. H. , STAPLETON B. J.
Published: April 2016

Während Verbindungen (Verbindungsklassen) wie p‐Naphthochinon, α‐Diketone, Arylanhydride, Diacetylbenzole, Dinitrobenzole, Nitrobenzaldehyde, Nitrobenzo‐, ‐acetophenone, Nitrobenzoate und andere keine doppelt negativ geladenen Molekül‐ oder Fragment‐ Ionen geben, werden bei beispielsweise Nitro‐ und Cyanbenzoesäuren derartige Ionen beobachtet.
ChemInform Abstract: PROTON AND CARBON‐13 NMR AND UV SPECTROSCOPIC STUDY OF THE STRUCTURE OF GLYCOLALDEHYDE IN AQUEOUS AND ALKALINE MEDIA
Authors: KHOMENKO T. I. , LEZINA V. P. , STEPANYANTS A. U. , SAKHAROV M. M. , GOLOVINA O. A. , KRYLOV O. V.
Published: April 2016

Glykolaldehyd liegt in wäßriger Lösung bei 29°C als 56:31:13‐Gemisch der Formen (I)‐(III) vor (1H‐NMR‐Spektren).
ChemInform Abstract: INVESTIGATION INTO THE BROWN‐WALKER REACTION. IV. OPTICAL STUDIES OF THE SURFACE CONDITIONS
Authors: BEWICK A. , BROWN D.
Published: April 2016

Die Veränderungen an der Oberfläche der Pt‐Elektrode, die unter den für die Kolbe‐Reaktion in wäßriger Lösung erforderlichen Bedingungen eintreten, werden mit Hilfe der modulierten Reflexionsspektroskopie untersucht.
ChemInform Abstract: ELECTROCHEMICAL SYNTHESES. VI. ANODIC METHOXYLATION OF NAPHTHALENE AS WELL AS S 1‐ AND 2‐METHOXYNAPHTHALENE
Authors: BOCKMAIR G. , FRITZ H. P.
Published: April 2016

Bei der anodischen Oxidation von Naphthalin in wasserfreiem methanolischem KOH entstehen 1,4‐ und 1,2‐Dimethoxy‐ sowie 1‐Methoxy‐naphthalin, daneben wenig 1,2,4‐Trimethoxy‐naphthalin.
ChemInform Abstract: ELECTROCHEMICAL SYNTHESIS OF UNSYMMETRIC KETONES AND SOME RELATED COUPLING REACTIONS
Authors: HABEEB J. J. , TUCK D. G.
Published: April 2016

An einer Cadmium‐Anode reagieren Benzoylbromid und Äthylbromid in Diglyme in Gegenwart von Tetraäthylammoniumperchlorat zu Propiophenon (III).
ChemInform Abstract: KINETICS AND SELECTIVITY OF HYDROLYSIS OF ETHYLENE OXIDE DURING CATALYSIS WITH SALTS OF CARBOXYLIC ACIDS
Authors: LEBEDEV N. N. , SHVETS V. F. , ROMASHKINA L. L.
Published: April 2016

Die Hydrolyse von Äthylenoxid in wäßrigen Lösungen von Naformiat, Na‐acetat oder K‐oxalat bei 20‐25°C liefert quantitativ Monoäthylenglykol; Polyäthylenglykole entstehen nur als Produkte von parallel verlaufenden alkalischen oder nichtkatalysierten Hydrolysereaktionen.
ChemInform Abstract: CYCLOPROPYL TRIFLATES. NEIGHBORING‐GROUP AND SOLVENT EFFECTS
Authors: CREARY X.
Published: April 2016

Während die Acetolyse des Sulfonats (I) in acetatgepufferter Lösung bei 1 10°C in einer Olefin‐beschleunigten Reaktion das Acetat (II) als einziges Produkt ergibt, wird bei der entsprechenden Reaktion des Sulfonats (III) die Konkurrenz einer "normalen" mit einer Olefin‐ beschleunigten Reaktion beobachtet, die zu den Produkten (IV) und (V) im Verhältnis 2,28: l führt.
ChemInform Abstract: EFFECT OF SURFACTANT MICELLES ON THE STEREOCHEMISTRY AND RATE OF ′AMSYLATE′ SOLVOLYTIC DISPLACEMENT REACTIONS IN WATER
Authors: SUKENIK C. N. , BERGMAN R. G.
Published: April 2016

Es wird die Hydrolyse z.B. der Benzolsulfonate (I) bei 25°C zu den Alkoholen (II) und (III) als Hauptprodukten und den Olefinen (IV) und (V) untersucht.
ChemInform Abstract: ACETOLYSIS OF 4‐HOMOADAMANTYL TOSYLATE. MULTIPLE DEGENERATE REARRANGEMENTS AND MECHANISM
Authors: NORDLANDER J. E. , HAMILTON J. B. JUN. , WU F. Y.‐H. , JINDAL S. P. , GRUETZMACHER R. R.
Published: April 2016

Aus dem nach bekannten Methoden dargestellten Keton (I) wird durch Hydrierung mit LiAlH4 und Tosylierung die Titelverbindung (IIa) erhalten (Ausbeute 60%).
ChemInform Abstract: PROPERTIES OF POLYFLUOROBENZOCYCLENES. XXVIII. SOLVOLYSIS OF 8‐SUBSTITUTED 3,4‐TETRA‐FLUOROBENZOBICYCLO(3.2.1)OCTADIENES AND ‐OCTENES
Authors: SLYN'KO N. M. , MIRONOVA M. K. , BARKHASH V. A.
Published: April 2016

Bei Acidolysereaktionen der 8‐syn‐substituierten Benzobicyclooctadiene (I) und (III) entstehen hauptsächlich die entsprechenden O‐Acyl‐Verbindungen (II); gleiches gilt für die Trifluoracetolyse des 8‐syn‐Brom und des 8‐syn‐Jod‐Derivats (in Gegenwart von Ag‐trifluoracetat).
ChemInform Abstract: FACILE CONVERSION OF N,N‐DIMETHYLHYDRAZONES TO CARBONYL COMPOUNDS BY CUPRIC ION‐CATALYZED HYDROLYSIS
Authors: COREY E. J. , KNAPP S.
Published: April 2016

4‐tert.‐Butyl‐cyclohexanon‐dimethylhydrazon (I) wird bei einer Photolyse in Gegenwart von Wasser und von Cu(II)‐Salzen zum Keton (II) hydrolysiert.
ChemInform Abstract: IN SITU GENERATION AND INTRAMOLECULAR TRAPPING OF O‐XYLYLENES BY COBALT‐CATALYZED ACETYLENE COOLIGOMERIZATIONS. A ONE‐STEP SYNTHESIS OF POLYCYCLES
Authors: FUNK R. L. , VOLLHARDT K. P. C.
Published: April 2016

Reaktion der Diine (I), (V) bzw. (VIII) mit dem Acetylen (II) in Gegenwart des Katalysators (III) liefert die polycyclischen Verbindungen (IVa), (IVb) (in nichttrennbarem Gemisch mit verschiedenen Regioisomeren), (VI), (VII) bzw. (IX) [im Gemisch mit ca. 15% bzw. 5% cis‐Isomeren (X)].
ChemInform Abstract: REGIOSELECTIVITY IN THE DIELS‐ALDER REACTION OF 1‐TRIMETHYLSILYLBUTADIENE
Authors: FLEMING I. , PERCIVAL A.
Published: April 2016

1‐Trimethylsilyl‐butadien (I) reagiert mit den Dienophilen (II), (V) und (VIII) hauptsächlich zu ortho‐Addukten wie (III).
ChemInform Abstract: SOLVENT CAGE EFFECT IN THE PHOTOLYSIS OF AZOMETHANE IN AQUEOUS ALCOHOLS AND OTHER MEDIA‐ A SEMIEMPIRICAL CORRELATION WITH MACROSCOPIC SOLVENT PARAMETERS
Authors: NODELMAN N. , MARTIN J. C.
Published: April 2016

Aus Sulfamid und ‐dem Äthylester (I) entsteht das Sulfonyldicarbamat (II), das in Gegenwart von Äthyldiisopropylamin mit dem Jodid (III) zum Produkt (IV) alkyliert werden kann.
ChemInform Abstract: STABILIZATION OF ARYLDIAZONIUM IONS BY CROWN ETHER COMPLEXATION
Authors: BARTSCH R. A. , CHEN H. , HADDOCK N. F. , JURI P. N.
Published: April 2016

Die thermische Zersetzung des Diazoniumsalzes (I) in 1,2‐Dichloräthan bei 50°C wird durch einen Zusatz des Kronenäthers 18‐crown‐6 verzögert, während andere wie z.B. 15‐crown‐5 oder Hexathia‐18‐crown‐6 keinen Einfluß auf die Reaktion haben.
ChemInform Abstract: CYCLIC OLIGOMERS OF 4‐AMINOPENTANOIC ACID
Authors: PILIPAUSKAS D. R. , KOPPLE K. D.
Published: April 2016

Der Aminocarbonsäureester (I), dessen Darstellung nach bekannten Methoden beschrieben wird, liefert bei Erhitzung in verdünnter Pyridinlösung als neutrales Hauptprodukt das Lactam (II) der 4‐Aminopentansäure und isomere cyclische Tetramere der Aminosäure, von denen drei in kleinen Mengen isoliert werden konnten.
ChemInform Abstract: REACTIONS WITH NITROENAMINES, XV. SYNTHESIS OF AROMATIC NITRO COMPOUNDS BY CYCLIZATION REACTIONS
Authors: SEVERIN TH. , IPACH I.
Published: April 2016

Aus den Aldehyden (I) und dem Nitroäthylen (II) werden über die Salze (III) die CH‐aciden Verbindungen (IV) dargestellt und anschließend mit Pyrrolidinacetat zu den Nitrodienaminen (V) kondensiert.
ChemInform Abstract: 5‐ENDO‐TRIGONAL REACTIONS‐ A DISFAVORED RING CLOSURE
Authors: BALDWIN J. E. , CUTTING J. , DUPONT W. , KRUSE L. , SILBERMAN L. , THOMAS R. C.
Published: April 2016

Unter basischen Bedingungen (Natriummethylat/Methanol oder Natriumhydrid/Tetrahydrofuran) cyclisieren die Ketole (II) nicht zu den Tetrahydrofuranonen (I), dagegen bilden sie in Gegenwart von p‐Toluolsulfonsäure in Benzol bei 80°C die Cyclisierungsprodukte (IV), da eine 5‐exo‐trig‐Reaktion gegenüber einer 5‐endo‐trig‐Reaktion begünstigt ist.
ChemInform Abstract: THERMALLY INDUCED SKELETAL INVERSION AND RING OPENING OF HEXAMETHYLBICYCLO(2.2.0)HEXANES
Authors: SINNEMA A. , VAN RANTWIJK F. , DE KONING A. J. , VAN WIJK A. M. , VAN BEKKUM H.
Published: April 2016

Die Thermolyse des all‐endo‐Hexamethyl‐bicyclo[2.2.0]hexans (I) gibt hauptsächlich das Invertomere (II), daneben das Octadien (III), das seinerseits zu (II) thermolysiert.
ChemInform Abstract: WITTIG REARRANGEMENTS OF ALLYL VINYLCYCLOPROPYLMETHYL ETHERS
Authors: CROMBIE L. , DARNBROUGH G. , PATTENDEN G.
Published: April 2016

Die aus den Allyl‐vinylcyclopropylmethyl‐äthern (I) hergestellten Anionen lagern sich in Alkohole und Aldehyde um.
ChemInform Abstract: THE COPE REARRANGEMENT ‐ A REACTION WITH A MANIFOLD MECHANISM.
Authors: WEHRLI R. , BELLUS D. , HANSEN H.‐J. , SCHMID H.
Published: April 2016

Die Cope‐ Umlagerung, ein typisches Beispiel einer orbital‐symmetrisch kontrollierten sigmatropen Reaktion, ist durch eine Dissoziations‐ und eine Rekombinationsstufe charakterisiert.
ChemInform Abstract: SKELETAL REARRANGEMENTS THROUGH HOMOENOLIZABLE METHYL GROUPS IN ACYCLIC KETONES. THE EFFECT OF STRAIN ON THE REGIOSELECTIVITY OF β‐ENOLATE CLEAVAGE
Authors: RAMPERSAD M. B. , STOTHERS J. B.
Published: April 2016

In Gegenwart einer starken Base wie Kalium‐tert.‐butylat findet eine Umlagerung der Ketone (I) zu den isomeren Ketonen (III) statt, wobei als Zwischenstufen die Cyclopropane (II) angenommen werden.
ChemInform Abstract: PHOTOCHEMISTRY OF AROMATIC COMPOUNDS. PHOTOSOLVOLYSIS OF 2‐(3,5‐DIMETHOXYPHENYL)ETHYL METHANESULFONATE
Authors: JAEGER D. A.
Published: April 2016

Das 2‐Aryl‐äthanmesylat (I) wird in 50% (v/v) wäßrigem Methanol photolysiert (40 min, 450 W Hanovia‐Lampe, Vycor‐Filter), wobei als Produkte erhalten werden 28,5% Äthanol (IIa), 19,1% Äther (IIb), 8,1% Äthan (Ilc), 5,3% Cyclobuten (III), 1,1% 1‐Aryl‐äthanol (IVa), 3,3% Äther (IVb) und 8% unverändertes (I).
ChemInform Abstract: CHARGE‐TRANSFER‐INDUCED PHOTOSOLVOLYSIS OF BENZYL ALCOHOLS
Authors: LIN C.‐I. , SINGH P. , ULLMAN E. F.
Published: April 2016

Die Photolyse der Alkohole (I) und (IV) in Methanol führt unter Wanderung der Arylgruppe zu den Olefinen (II) bzw. dem Äther (V), wobei die Dimethylaminophenyl‐Gruppe bevorzugt vor der Phenylgruppe wandert.
ChemInform Abstract: PSEUDODILUTION, THE SOLID‐PHASE IMMOBILIZATION OF BENZYNE
Authors: JAYALEKSHMY P. , MAZUR S.
Published: April 2016

In Dichloräthan und in Gegenwart von überschüssigem Tetracyclon (II) wird sowohl das Aminobenzotriazol (Ia) als auch das an carboxyliertes Polystyrol gebundene Analoge (Ib) mit Pb‐tetraacetat zum Addukt (III) oxidiert.
ChemInform Abstract: ABSOLUTE RATES OF TRIPLET‐TRIPLET DIMERIZATION AND CYCLOADDITION OF TRIMETHYLENEMETHANE BIRADICALS
Authors: PLATZ M. S. , BERSON J. A.
Published: April 2016

Die Bestrahlung einer Lösung des Diazens (I) in einem 2:1‐ Gemisch aus Isopropanol und Propanol bei l43,5°K führt in einer Reaktion 2. Ordnung zum Diradikal (II) und dessen Dimeren.
ChemInform Abstract: PREPARATION AND REACTIVITY OF DITHIOETHER DICATIONS (R2S+‐+SR2)‐ A NEW FUNCTIONAL GROUP
Authors: MUSKER W. K. , ROUSH P. B.
Published: April 2016

Bei Oxidationen der Dithiacyclane (I) und (III) mit NOBF4 in Acetonitril entstehen unter NO‐Eliminierung die Tetrafluoroborate (II) bzw. (IV) (H‐NMR‐, 13C‐NMR‐Spektren).
ChemInform Abstract: FLUORINE‐CONTAINING CARBOCATIONS. XI. FORMATION OF POLYFLUORINATED 1‐CHLORO‐1‐FLUOROARENONIUM IONS DURING ELECTROPHILIC CHLORINATION OF POLYFLUOROAROMATIC COMPOUNDS
Authors: SHTEINGARTS V. D. , DOBRONRAVOV P. N.
Published: April 2016

19F‐NMR‐ spektrometrisch läßt sich die Bildung des Kations (II) bei der Chlorierung von Per‐ fluorbenzol (I) mit C12 und SbF5 in SO2ClF bei ‐60°C nachweisen; das Kation (II) geht bei ‐40°C in das Isomere (III) über, aus dem bei ‐20°C die Kationen (IV) entstehen.
ChemInform Abstract: SYNTHETIC METHODS AND REACTIONS. 17. URANIUM HEXAFLUORIDE, A CONVENIENT NEW OXIDIZING AGENT FOR ORGANIC SYNTHESIS
Authors: OLAH G. A. , WELCH J. , HO T.‐L.
Published: April 2016

Mit UF6 in Freon‐Lösung lassen sich Äther oxidativ in Carbonylverbindungen und Alkohole spalten, so z.B. die Benzyl bzw. Benzhydryläther (I) in die Aldehyde (IIa) bzw. die Ketone (IIb) und die Alkohole (III).
ChemInform Abstract: POLYMER SUPPORTED REAGENTS. CHROMIC ACID ON ANION EXCHANGE RESINS. A SIMPLE AND PRACTICAL OXIDATION OF ALCOHOLS TO ALDEHYDES AND KETONES
Authors: CAINELLI G. , CARDILLO G. , ORENA M. , SANDRI S.
Published: April 2016

Die durch Zusatz von Amberlyst A‐26 (CF‐Form) zu einer wäßrigen CrO3‐Lösung erhältliche CrO4H′‐ Form des Harzes ist ein zur Oxidation prim. und sek. Alkohole zu Aldehyden bzw. Ketonen hervorragend geeignetes Reagenz.
ChemInform Abstract: PROPERTIES OF POLYFLUOROBENZOCYCLENES. XXIX. OXIDATION OF 8‐HYDROXY‐3,4‐TETRAFLUOROBENZOBICYCLO(3.2.1)OCTADIENES WITH A JONES REAGENT
Authors: SLYN'KO N. M. , MIRONOVA M. K. , BARKHASH V. A.
Published: April 2016

Die Jones‐Oxidation der Alkohole (I) (in Aceton mit wäßriger Chromschwefelsäure bei‐20°C ; Reaktionsdauer 24 h) liefert Gemische der Carbonylverbindungen (II)‐(IV) (19F‐, H‐NMR‐Spektren).
ChemInform Abstract: Monomethylbutene.
Authors: PICHLER H. , SCHULZ H. , ZEIN EL DEEN A.
Published: April 2016

Die katalytische Gasphasenoxidation der Monomethylbutene (I), (II) und (III) über einem V2O5 ‐ MoO3 ‐ P2O5 ‐Metallträgerkatalysator wird in einer Festbettreaktion in Abhängigkeit von der Olefinkonzentration, der Kontaktzeit (0,1‐0,3 Sek.) und der Temperatur (350‐470°C) untersucht.
ChemInform Abstract: REDUCTION OF MESITYL OXIDE
Authors: WISNIAK J. , HERSKOWITZ M. , ROFFE D. , SMILOVITZ S.
Published: April 2016

Bei der Hydrierung in Gegenwart von Palladium‐, Ruthenium‐ und Raney‐Nickel‐Katalysatoren läßt sich Mesityloxid (I) in flüssiger Phase zu Methylisobutylketon (II) reduzieren.
ChemInform Abstract: OXIDATIVE DEAMINATION OF AROMATIC 1,4‐IMINES. A NEW SYNTHESIS OF POLYNUCLEAR AROMATIC HYDROCARBONS
Authors: GRIBBLE G. W. , ALLEN R. W. , ANDERSON P. S. , CHRISTY M. E. , DYLION COLTON C.
Published: April 2016

Während sich das 1,4‐Imin (I) bei der Umwandlung in das N‐Oxid (II) zum Oxazin (III) umlagert, werden die aus zahlreichen weiteren, 1,4‐Iminen (IV), (VI) oder (IX) erhaltenen N‐Oxide zu den Aromaten (V), (VII) und (X) gespalten.
ChemInform Abstract: ARYLATION OF KETOXIMES WITH ARYLDIAZONIUM SALTS
Authors: NESYNOV E. P. , PEL'KIS P. S.
Published: April 2016

Die Ketoxime (I) reagieren nach der Überführung in die Na‐Salze mit äquimolaren Mengen von Diazoniumsalzen in acetatgepuffertem wäßrigem Aceton bei O‐5°C unter Bildung von O‐Aryl‐ketoximen (II).
ChemInform Abstract: ALKENE EPOXIDATION BY INTERMEDIATES FORMED DURING THE OZONATION OF ALKYNES
Authors: KEAY R. E. , HAMILTON G. A.
Published: April 2016

Alkene werden durch die Ozonisierungsprodukte von Alkinen, wie z.B. (I), epoxidiert.
ChemInform Abstract: A NOVEL STEREOSPECIFIC ALKENYL‐ALKENYL CROSS‐COUPLING BY A PALLADIUM‐ OR NICKEL‐CATALYZED REACTION OF ALKENYLALANES WITH ALKENYL HALIDES
Authors: BABA S. , NEGISHI E.
Published: April 2016

Durch Kupplungsreaktionen von Alkenylalanen mit Halogenalkenen in Gegenwart komplexer Pd‐ oder Ni‐ Katalysatoren lassen sich stereospezifisch konjugierte Diene darstellen: Man erhält zum Beispiel durch Umsetzung des E‐Alans (I) (entsteht bei der Reaktion von Hexin‐ (I) mit äquimolaren Mengen von Diisobutyl‐AIH in Hexan) mit dem Brommethacrylat (II) in Gegenwart eines Pd‐Katalysators (aus PdClg (PPh3 )2 und Diisobutyl‐AIH im Molverhältnis 1 22) in siedendem THF‐Hexan (Reaktionsdauer 15 min) glatt das Dien (III) (Isomerenverhältnis E, E :E, Z 97 23).
ChemInform Abstract: STUDY OF SUBSTITUTED GLYOXYLIC ACID ARYLHYDRAZONES. XXIII. REACTION OF N‐ARYLCARBETHOXYACETYLTHIOACETAMIDES WITH ARYLDIAZONIUM SALTS
Authors: DUBENKO R. G. , GORBENKO E. F. , KONYSHEVA V. D. , PEL'KIS P. S.
Published: April 2016

Kupplungsreaktionen der Titelverbindungen (I) mit den Diazoniumsalzen (II) in acetatgepuffertem wäßrig‐ äthanolischem NaOH liefern die Hydrazone (III).
ChemInform Abstract: OLEFIN METATHESIS AND SIDE REACTIONS WITH THE BINARY SYSTEMS OF TUNGSTEN HEXACHLORIDE AND METAL ALKYLS
Authors: ICHIKAWA K. , WATANABE O. , TAKAGI T. , FUKUZUMI K.
Published: April 2016

Die Titelreaktion von Hepten‐(2) in Benzol ( ;z.B. mit Etzln, BuLi und B112 Sn als Metall‐Alkyl) führt außer zu den Metatheseprodukten zu Heptylbenzol als Friedel‐Crafts‐Produkt.
ChemInform Abstract: A NEW SYNTHESIS OF O‐ALKYLHYDROXYLAMINES
Authors: GROCHOWSKI E. , JURCZAK J.
Published: April 2016

Alkohole (I) werden mit N‐Hydroxyphthalimid (II) in Gegenwart des Betains (III) zu N‐Alkoxyphthalimiden (IV) kondensiert, aus denen durch weitere Umsetzung mit Hydrazin die O‐Alkylhydroxylarnine (V) freigesetzt werden.
ChemInform Abstract: REACTION OF ORGANOBORANES WITH IRON(III) AZIDE IN THE PRESENCE OF HYDROGEN PEROXIDE. A NOVEL SYNTHESIS OF AZIDOALKANES FROM ALKENES VIA HYDROBORATION
Authors: SUZUKI A. , ISHIDOYA M. , TABATA M.
Published: April 2016

Die aus den Olefinen (I) durch Hydroborierung zugänglichen Trialkylborane (II) werden mit Natriumazid und Wasserstoffperoxid in Gegenwart von Eisen(III)‐sulfat zu Alkylaziden (III) umgesetzt.
ChemInform Abstract: THE THERMAL CONDENSATION OF ISOBUTYLENE WITH FORMALDEHYDE
Authors: STAPP P. R.
Published: April 2016

Isobutylen (I) bildet bei der Kondensation mit Formaldehyd (II) bei 275 ‐ 300°C und bei einem (I)/(II)‐Verhältnis von 10:1 das Butenol (III).
ChemInform Abstract: HYDROFORMYLATE PROPYLENE AT LOW PRESSURE
Authors: FOWLER R. , CONNOR H. , BAEHL R. A.
Published: April 2016

Ein neues Niederdruckverfahren zur Darstellung von Butyraldehyd in Gegenwart eines Rhodiumkatalysators der zurück= ‐ gewonnen werden kann, wird beschrieben.