bluuebunny/crossref_metadata_2025 huggingface dataset:
Improved miscibility of low‐density polyethylene/chitosan blends through variation in the compounding length
Authors: Tan Yi Min , Lim Szu Hui , Tay Bee Yen , Lee Mun Wai , Thian Eng San
Published: May 2016

Synthetic biopolymer blends are gaining interest in the packaging industry because the incorporation of natural materials imparts biodegradable properties to films. In this study, polyethylene/chitosan (chitosan) films with thicknesses of about 0.3 ± 0.01 mm were fabricated via compression molding. The effects of the variation in the length of compounding as a function of the length/diameter (l/d) ratio (15:1, 30:1, 45:1, 60:1, and 75:1) were investigated. The experimental results show that a higher degree of miscibility of the blends was achieved with increasing compounding length; this led to improved mechanical properties in the films, and this was verified by the statistical analysis of data with the analysis of variance procedure. The tensile strength (TS) increased by about 25%, whereas the elongation at break (Ebreak) increased by twofold. Films fabricated from blends compounded with an l/d ratio of 60:1 had the highest TS and Ebreak values, and the TS was comparable to that of low‐density polyethylene films. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43796.
Preparation of a cellulose acetate/organic montmorillonite composite porous ultrafine fiber membrane for enzyme immobilization
Authors: Zhang Jinning , Song Mingyu , Wang Xiaoyu , Wu Jieru , Yang Zhanping , Cao Jianhua , Chen Yun , Wei Qufu
Published: May 2016

Four types of fibrous membranes based on cellulose acetate (CA)—CA membranes with nonporous fibers, CA/organic montmorillonite (O‐MMT) membranes with nonporous fibers, CA membranes with porous fibers, and CA/O‐MMT membranes with porous fibers—were prepared by electrospinning, and then, they were used for enzyme immobilization. The surface morphologies of the composite fibrous membranes were investigated with scanning electron microscopy and transmission electron microscopy. The optimum pH was 3.5 for all of the immobilized enzymes, and the optimum temperature was 50 °C. Compared with the free enzyme, the immobilized enzyme showed better stability for pH and temperature changes. Moreover, the addition of O‐MMT and the pores on the fibers improved the storage stability and the operational stability. Among the four kinds of fibrous membranes, the CA/O‐MMT membranes with porous fibers showed the best stability for the immobilized enzymes. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43818.
Frequency and voltage dependence of dielectric properties, complex electric modulus, and electrical conductivity in Au/7% graphene doped‐PVA/n‐Si (MPS) structures
Authors: Altındal Yerişkin Seçkin , Balbaşı Muzaffer , Tataroğlu Adem
Published: May 2016

In order to increase the capacitance of Au/n‐Si (MS) structure, 7% graphene doped PVA was coated on n‐Si as an interfacial layer. The measured data of capacitance (C) and conductance (G/ω) of Au/7% graphene doped‐PVA/n‐Si (MPS) structure was utilized for the calculation of real and imaginary parts of complex permittivity (ε* = ε′ − jε″), loss tangent (tanδ), complex electric modulus (M* = M′ + jM″), and electrical conductivity (σ). The admittance measurements (C and G/ω) were carried out in the frequency range of 0.5 kHz to 1 MHz at room temperature. Frequency dependence of the dielectric constant (ε′), dielectric loss (ε″) and tanδ shows a dispersive behavior at low frequencies. This behavior was explained by Maxwell–Wagner relaxation. Due to the dipolar and the interfacial polarizations, as well as the surface states (Nss) and the interfacial PVA layer, the parameters exhibited a strong dependence on frequency and applied bias voltage. The σ versus log(f) plot exhibited both low and high frequency dispersion phenomena such that at low frequencies σ value corresponding to the dc conductivity (σdc), but at high frequencies it corresponds to the ac conductivity (σac). M′ and M″, both, have low values in the low frequency region. However, an increase is observed with the increasing frequency due to the short‐range mobility of charge carriers. As a result, the change in dielectric parameters and electric modulus with frequency is the result of relaxation phenomena and surface states. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43827.
PLA/Pluronic® nanoparticles as potential oral delivery systems: Preparation, colloidal and chemical stability, and loading capacity
Authors: Palacio Juliana , Agudelo Natalia A. , Lopez Betty L.
Published: May 2016

Mixed nanoparticles of PLA and Pluronic® were developed to overcome the low chemical and colloidal stability in the gastrointestinal track for PLA nanoparticles. The aim of present study was to improve the stability of coating the PLA nanoparticle surface with hydrophilic polymers, such as poly(ethylene oxide). The Pluronic® covered PLA nanoparticles were prepared through nanoprecipitation method. The method was optimized in terms of addition order, type, and concentration of Pluronic® and stirring velocity to obtain particles with sizes around 100 nm. The ζ potential measurements and thermal analysis confirmed the formation of PEO layers around the nanoparticles. Dynamic Light Scattering studies of mixed PLA/Pluronic® nanoparticles showed colloidal and chemical stability during storage and in simulated gastrointestinal fluids, suggesting this system as an alternative for the delivery of therapeutics via oral administration. The nanoparticles ability of encapsulating hydrophobic drugs was evaluated using Nile Red as a probe molecule. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43828.
Fault Detection Based On Online Probability Density Function Estimation
Authors: Ghaniee Zarch Majid , Alipouri Yousef , Poshtan Javad
Published: May 2016

This study presents a new fault detection scheme based on the probability density function (PDF) of system output. Unlike the classical fault detection and diagnosis methods, in the proposed method, distribution of the system output is estimated online. To achieve this goal, an algorithm is introduced to estimate PDF online using fuzzy logic. Furthermore, convergence of this algorithm is investigated. Then, a residual is constructed that can show the existence of a fault in the system. The main advantages of the proposed method are robustness against measurement noise, even though it does not need the exact model and measured data of inputs and states. Simulation results show that this scheme can detect abrupt faults very well.
Bemessungsereignisse für vorübergehende Bau‐ bzw. Revisionsphasen bei Hochwasserschutzbauwerken
Authors: Niehüser Sebastian , Jensen Jürgen , Bender Jens
Published: May 2016

In Deutschland werden Hochwasserschutzbauwerke i. d. R. so bemessen, dass sie einem Hochwasserereignis mit einer definierten Eintrittswahrscheinlichkeit standhalten können. Bei der Festlegung der anzusetzenden Eintrittswahrscheinlichkeit sollten die im Versagensfall zu erwartenden Schäden in dem zu schützenden Bereich berücksichtigt werden. Die erwartete Nutzungsdauer für z. B. Deiche beträgt dabei i. d. R. zwischen 50 und 100 Jahren. Die geotechnischen Nachweise sind entsprechend europäischer Regelungen und nationalen Ergänzungen für eine Referenzperiode von 50 Jahren durchzuführen. Hinweise zum Hochwasserschutz in Bau‐ und Revisionszeiten werden nur beispielhaft erwähnt, wie anfallende Baumaßnahmen nur in Jahreszeiten auszuführen, in denen die Wahrscheinlichkeit großer Hochwasserereignisse geringer ist. Dabei stellt sich jedoch die Frage nach einem Wiederkehrintervall, das hier angesetzt werden sollte. Letztlich geht es um die Abschätzung der Wahrscheinlichkeit, dass ein bestimmtes Ereignis an einem Standort in einem Zeitraum der Bau‐ und Revisionsphase eintritt.

In diesem Beitrag wird exemplarisch ein Ansatz unter Anwendung der Poisson‐Verteilung vorgestellt, der den Zusammenhang zwischen der Eintrittswahrscheinlichkeit von Bemessungsereignissen unter Einbeziehung der benötigten Bau‐ und Revisionszeiten sowie der Schutzbedürftigkeit des Hinterlands berücksichtigt.

Design events for temporary construction or revision periods of flood protection measures

Flood protections measures in Germany are designed in a way that they can withstand a flooding event with a defined frequency of occurrence. The evaluation of the return period of the design event should include potential damages in the hinterland or the protected area, respectively. However, flood protection structures are usually designed for an estimated operation time between 50 and 100 years. The geotechnical evidence has to be carried out in accordance with European regulations and their national supplements for a reference period of 50 years. But, the realization of the flood protection in terms of temporary construction or revision phases is only mentioned exemplarily as to perform them in seasons in which the likelihood of large floods is less. Here, the question arises about the return period to account for. Hence, the focus is on estimating the probability that a particular event occurs at a specific site during the construction or revision period.

In this paper, we introduce an approach based on the Poisson distribution taking into account the relation between the frequency of occurrence of design events and the construction or revision period as well as the vulnerability of the area to be protected.
Tragwerksplanung und Rohbauausführung des neuen Henninger Turm
Authors: Gerritzen Dominique , Sack Steffen , Bachmann Hubert , Mukherjee Dilip , Tang Xiaofeng
Published: May 2016

Im vorliegenden Beitrag wird über besondere Fragestellungen und Lösungen bei der Tragwerksplanung und der Rohbauausführung des neuen Henninger Turm in Frankfurt berichtet. Bei dem 140 m hohen Henninger Turm handelt es sich um ein schwingungsanfälliges Bauwerk, welches besondere Anforderungen an die Planung der aussteifenden Bauteile, die Gründung und die Modellierung des Tragwerks stellt. Zunächst wird dargestellt, wie der anspruchsvolle Entwurf der Architekten (MSW – Meixner Schlüter Wendt) bei einer maximalen Raumausnutzung möglichst wirtschaftlich tragwerksplanerisch umgesetzt und die Kombination der unterschiedlichen Gebäudearten von Turm und Sockel fugenlos realisiert wurde. Weiterhin werden besondere Lösungen bei der Bauausführung aufgezeigt, mit denen es gelang, den Rohbau des gesamten Henninger Turm in etwas mehr als 1 ½ Jahren fertig zu stellen.

Structural design and construction of the new Henninger Turm

The following paper covers special issues and solutions on the structural design and construction of the new Henninger Turm in Frankfurt. The 140 m tall high‐rise building susceptible to structure oscillations demanded special efforts in the design of the bracing structural elements, the foundation and the structural modelling. The first part of the paper focuses on how the ambitious architetural design by MSW – Meixner Schlüter Wendt was adopted in a maximum space and cost‐efficient structural design in which the contrary building types, high‐rise building and base structure, were combined jointless. The second part shows special construction solutions due to which the complete shell construction could be completed in somewhat more than 1 ½ years.
Proton Affinities of Cationic Carbone Adducts [AC(PPh3)2]+(A=Halogen, Hydrogen, Methyl) and Unusual Electronic Structures of the Cations and Dications [AC(H)(PPh3)2]2+
Authors: Petz Wolfgang , Kuzu Istemi , Frenking Gernot , Andrada Diego M. , Neumüller Bernhard , Fritz Maximilian , Münzer Jörn E.
Published: May 2016

This work reports the syntheses and the first crystal structures of the cationic carbone adducts [FC(PPh3)2]+and [BrC(PPh3)2]+and the protonated dication [FC(H)(PPh3)2]2+, which are derived from the carbone C(PPh3)2. Quantum chemical calculations and bonding analyses were carried out for the series of cations [AC(PPh3)2]+and dications [AC(H)(PPh3)2]2+, where A=H, Me, F, Cl, Br, I. The bonding analysis suggests that the cations are best described as phosphane complexes L→(CA)+←L (L=PPh3), which are related to the neutral borylene adducts L→(BA)←L (L=cyclic carbene; A=H, aryl) that were recently isolated. The carbone adducts [AC(PPh3)2]+possess a π electron lone pair at carbon and they can easily be protonated to the dications [AC(H)(PPh3)2]2+. The calculations of the dications indicate that the molecules are best represented as complexes L→(CHA)2+←L (L=PPh3) where a carbene dication is stabilized by the ligands. The central carbon atom in the cations and even in the dications carries a negative partial charge, which is larger than the negative charge at fluorine. There is also the peculiar situation in which the carbon–fluorine bonds in [FC(PPh3)2]+and [FC(H)(PPh3)2]2+exhibit the expected polarity with the negative end at fluorine, but the carbon atom has a larger negative charge than fluorine. Given the similarity of carbodiphosphorane C(PPh3)2and carbodicarbene C(NHC)2, we expect that analogous compounds [AC(NHC)2]+and [AC(H)(NHC)2]2+with similar features as [AC(PPh3)2]+and [AC(H)(PPh3)2]2+can be isolated.
Zinc Porphyrin Metal‐Center Exchange at the Solid–Liquid Interface
Authors: Franke Matthias , Marchini Florencia , Jux Norbert , Steinrück Hans‐Peter , Lytken Ole , Williams Federico J.
Published: May 2016

Demetalation of zinc 5,10,15,20‐tetraphenylporphyrin (ZnTPP) under acidic conditions and ion exchange with Cu2+ ions at neutral pH are both rapid reactions in the liquid medium. However, for ZnTPP monolayers adsorbed on a Au(111) surface exposed to aqueous solution, we find that, although ion exchange takes place rapidly as expected, demetalation does not occur, even at pH values as low as 0. Based on this, we conclude that metal center exchange on the surface does not proceed through a free‐base porphyrin as an intermediate. Furthermore, once formed, CuTPP is stable on the surface and the reverse exchange from CuTPP to ZnTPP in the presence of Zn2+ ions could not be achieved. The preference for copper is so strong that even an attempt to exchange adsorbed ZnTPP with Ni2+ ions in the presence of traces of Cu2+ yielded CuTPP rather than NiTPP.
Differential Recognition of Anions with Selectivity towards F− by a Calix[6]arene–Thiourea Conjugate Investigated by Spectroscopy, Microscopy, and Computational Modeling by DFT
Authors: Nehra Anita , Bandaru Sateesh , Yarramala Deepthi S. , Rao Chebrolu Pulla
Published: May 2016

Anion recognition studies were performed with triazole‐appended thiourea conjugates of calix[6]arene (i.e., compound 6L) by absorption and 1H NMR spectroscopy by using nineteen different anions. The composition of the species of recognition was derived from ESI mass spectrometry. The absorption spectra of compound 6L showed a new band at λ=455 nm in the presence of F− due to a charge transfer from the anion to the thiourea moiety and the absorbance increases almost linearly in the concentration range 5 to 200 μm. This is associated with a strong visual color change of the solution. Other anions, such as H2PO4− and HSO4−, exhibit a redshift of the λ=345 nm band and the spectral changes are associated with the formation of an isosbestic point at λ=343 nm. 1H NMR studies further confirm the binding of F− efficiently to the thiourea group among the halides by shifting the thiourea proton signals downfield followed by their disappearance after the addition of more than one equivalent of F−. The other anions also showed interactions with compound 6L, however, their binding strength follows the order F−>CO32−>H2PO4−≈CH3COO−>HSO4−. The NMR spectral changes clearly revealed the anion‐binding region of the arms in case of all these anions. The anion binding to compound 6L indeed stabilizes a flattened‐cone conformation as deduced based on the calix‐aromatic proton signals and was further confirmed by VT 1H NMR experiments. The stabilization of the flattened‐cone conformation was further augmented by the interaction of the butyl moiety of the nBu4N+ counterion. The structural features of the anion‐bound species were demonstrated by DFT computations and the resultant structures carried the features that were predicted based on the 1H NMR spectroscopic measurements. In addition, SEM images showed a marigold flower‐type morphology for compound 6L and this has been transformed into a chain‐like structure of connected spherical particles in the presence of F−. The anion‐induced microstructural features are reflective of the binding strength, size, and shape of the anions. The binding strengths of the anions by compound 6L were further compared with that of compound 4L, a calix[4]arene analogue of compound 6L, in order to address the role of the number of arms built on the calixarene platform based on absorption spectroscopy, 1H NMR spectroscopy, and DFT computations and it was found that compound 6L is a better receptor for F−, which extends its interactions from all the three arms.
Combined Chemical Activation and Fenton Degradation to Convert Waste Polyethylene into High‐Value Fine Chemicals
Authors: Chow Cheuk‐Fai , Wong Wing‐Leung , Ho Keith Yat‐Fung , Chan Chung‐Sum , Gong Cheng‐Bin
Published: May 2016

Plastic waste is a valuable organic resource. However, proper technologies to recover usable materials from plastic are still very rare. Although the conversion/cracking/degradation of certain plastics into chemicals has drawn much attention, effective and selective cracking of the major waste plastic polyethylene is extremely difficult, with degradation of C−C/C−H bonds identified as the bottleneck. Pyrolysis, for example, is a nonselective degradation method used to crack plastics, but it requires a very high energy input. To solve the current plastic pollution crisis, more effective technologies are needed for converting plastic waste into useful substances that can be fed into the energy cycle or used to produce fine chemicals for industry. In this study, we demonstrate a new and effective chemical approach by using the Fenton reaction to convert polyethylene plastic waste into carboxylic acids under ambient conditions. Understanding the fundamentals of this new chemical process provides a possible protocol to solve global plastic‐waste problems.
Solid‐Phase Synthesis and Characterization of N‐Terminally Elongated Aβ−3–x‐Peptides
Authors: Beyer Isaak , Rezaei‐Ghaleh Nasrollah , Klafki Hans‐Wolfgang , Jahn Olaf , Haußmann Ute , Wiltfang Jens , Zweckstetter Markus , Knölker Hans‐Joachim
Published: May 2016

In addition to the prototypic amyloid‐β (Aβ) peptides Aβ1–40 and Aβ1–42, several Aβ variants differing in their amino and carboxy termini have been described. Synthetic availability of an Aβ variant is often the key to study its role under physiological or pathological conditions. Herein, we report a protocol for the efficient solid‐phase peptide synthesis of the N‐terminally elongated Aβ‐peptides Aβ−3–38, Aβ−3–40, and Aβ−3–42. Biophysical characterization by NMR spectroscopy, CD spectroscopy, an aggregation assay, and electron microscopy revealed that all three peptides were prone to aggregation into amyloid fibrils. Immunoprecipitation, followed by mass spectrometry, indicated that Aβ−3–38 and Aβ−3–40 are generated by transfected cells even in the presence of a tripartite β‐site amyloid precursor protein cleaving enzyme 1 (BACE1) inhibitor. The elongated Aβ peptides starting at Val(−3) can be separated from N‐terminally‐truncated Aβ forms by high‐resolution isoelectric‐focusing techniques, despite virtually identical isoelectric points. The synthetic Aβ variants and the methods presented here are providing tools to advance our understanding of the potential roles of N‐terminally elongated Aβ variants in Alzheimer's disease.
Regioselective Alkylative Carboxylation of Allenamides with Carbon Dioxide and Dialkylzinc Reagents Catalyzed by an N‐Heterocyclic Carbene–Copper Complex
Authors: Gholap Sandeep Suryabhan , Takimoto Masanori , Hou Zhaomin
Published: May 2016

The alkylative carboxylation of allenamide catalyzed by an N‐heterocyclic carbene (NHC)–copper(I) complex [(IPr)CuCl] with CO2 and dialkylzinc reagents was investigated. The reaction of allenamides with dialkylzinc reagents (1.5 equiv) and CO2 (1 atm.) proceeded smoothly in the presence of a catalytic quantity of [(IPr)CuCl] to afford (Z)‐α,β‐dehydro‐β‐amino acid esters in good yields. The reaction is regioselective, with the alkyl group introduced onto the less hindered γ‐carbon, and the carboxyl group introduced onto the β‐carbon atom of the allenamides. The first step of the reaction was alkylative zincation of the allenamides to give an alkenylzinc intermediate followed by nucleophilic addition to CO2. A variety of cyclic and acyclic allenamides were found to be applicable to this transformation. Dialkylzinc reagents bearing β‐hydrogen atoms, such as Et2Zn or Bu2Zn, also gave the corresponding alkylative carboxylation products without β‐hydride elimination. The present methodology provides an easy route to alkyl‐substituted α,β‐dehydro‐β‐amino acid ester derivatives under mild reaction conditions with high regio‐ and stereoselectivtiy.
Chiral Phosphate in Rhodium‐Catalyzed Asymmetric [2+2+2] Cycloaddition: Ligand, Counterion, or Both?
Authors: Barbazanges Marion , Caytan Elsa , Lesage Denis , Aubert Corinne , Fensterbank Louis , Gandon Vincent , Ollivier Cyril
Published: May 2016

Investigations based on NMR spectroscopy, mass spectrometry, and DFT calculations shed light on the metallic species generated in the rhodium‐catalyzed asymmetric [2+2+2] cycloaddition reaction between diynes and isocyanates with the chiral phosphate TRIP. The catalytic mixture comprising [{Rh(cod)Cl}2], 1,4‐diphenylphosphinobutane (dppb), and Ag(S)‐TRIP actually gives rise to two species, both having an effect on the stereoselectivity. One is a rhodium(I) complex in which TRIP is a weakly coordinating counterion, whereas the other is a bimetallic Rh/Ag complex in which TRIP is a strongly coordinating X‐type ligand.
A Snapshot of the Properties of Single Nanoparticles at the Moment of a Collision
Authors: Huang Xinjian , Deng Haiqiang , Liu Cheng , Jiang Jing , Zeng Qiang , Wang Lishi
Published: May 2016

Direct electrochemical characterization of freely moving nanoparticles (NPs) at the individual particle level is challenging. A method is presented that can achieve this goal based on the collision between a NP and an ultramicroelectrode (UME). By applying a sinusoidal potential to the UME and monitoring the current response in the frequency domain, a sudden change in the phase angle indicates the arrival of a NP at the UME. The response induced by the collision can be isolated and used to explore the properties of the NP. This method, analogous to a high‐speed camera, can obtain a snapshot of the properties of the single NP at the moment of a collision. The proposed method was employed to investigate the properties of both the hard catalytic Pt NP and soft electroactive emulsion droplets, and many new insights were revealed thereafter. The method also has the potential to be applied in many other fields, where the interested signals appear as discrete events.
Iridium‐Catalyzed Intramolecular Methoxy C−H Addition to Carbon–Carbon Triple Bonds: Direct Synthesis of 3‐Substituted Benzofurans from o‐Methoxyphenylalkynes
Authors: Torigoe Takeru , Ohmura Toshimichi , Suginome Michinori
Published: May 2016

Catalytic hydroalkylation of an alkyne with methyl ether was accomplished. Intramolecular addition of the C−H bond of a methoxy group in 1‐methoxy‐2‐(arylethynyl)benzenes across a carbon–carbon triple bond took place efficiently either in toluene at 110 °C or in p‐xylene at 135 °C in the presence of an iridium catalyst. The initial 5‐exo cyclization products underwent double‐bond migration during the reaction to give 3‐(arylmethyl)benzofurans in high yields.
ChemInform Abstract: Anomalous Diffusion of Tin in GaAs.
Authors: ERKAYA H. H. , ROEDEL R. J. , LAREAU R. , WILLIAMS P. , LEAVITT J. , VON NEIDA A.
Published: May 2016

Durch die Sn‐Diffusion in ein p‐GaAs‐ Substrat, die in einem "leaky tube"‐Diffusionssystem durchgeführt wird, soll versucht werden, mit einer Niedrigtemp.‐Verfahrenstechnik n ‐ p‐Übergänge zu erzeugen.
ChemInform Abstract: Mössbauer‐Study of the Thermal Transformations of Kaolin Caminau at Temperatures from 383K to 1465 K.
Authors: MOYA T. , FOURNES L. , HAGENMULLER P. , KOLDITZ L. , BLUMENTHAL G. , WEGNER G.
Published: May 2016

Das im Kaolin in unterschiedlichen Bindungsformen vorliegende Eisen wird mittels Mössbauer‐Spektroskopie charakterisiert und damit die Vorgänge bei den thermischen Umwandlungen bis 1465 K verfolgt.
ChemInform Abstract: Indium Oxide, Oxygen Photoanode of High Quantum Efficiency.
Authors: SCHUMACHER L. C. , MAMICHE‐AFARA S. , DIGNAM M. J.
Published: May 2016

Durch Oxidation (O2, 30 min, 350°C) dünner In‐Metallfilme werden In2O3‐Filme von ca. 1000Å Dicke hergestellt und auf ihre photoelektrochemischen Eigenschaften untersucht.
ChemInform Abstract: Studies in the Flexibility of Macrocycle Ligands. Calculation of Macrocycle Cavity Size by Force‐field Methods.
Authors: DREW M. G. B. , HOLLIS S. , YATES P. C.
Published: May 2016

Der Co‐Komplex kristallisiert in der RG P212121 mit Z=4 und ist oktaedrisch koordiniert.
ChemInform Abstract: N‐Aryl‐N′‐acetylureido‐O‐alkylxanthates and Bis‐[N‐aryl‐N′‐acetylureido]‐O‐polymethylene Bisxanthates.
Authors: JOSHI P. C. JUN. , KARNATAK K. B. , SAH M. M. , PANT A. K.
Published: May 2016

Die Chloressigsäureureide (I) werden mit Ka1iummethyl‐ oder ‐ethylxanthogenat zu den Acetylureidoxanthogenaten (II) und mit den Dikaliumdixanthogenaten (III) zu (IV) umgesetzt.
ChemInform Abstract: Olefin Synthesis via the Lithium Derivatives of the N,N,N′,N′‐Tetramethyldiamides of Arylmethanephosphonic Acids.
Authors: PETROVA J. , MOMCHILOVA S. , KIRILOV M.
Published: May 2016

Die Lithium‐Derivate der Phosphonsäureamide (I) reagieren mit den Aldehyden (II) bei tiefer Temperatur mit hoher Selektivität zu den erythro‐Addukten (III), die bei der Thermolyse die Z‐Olefine (IV) ergeben.
ChemInform Abstract: Stereoselective Insertion of the Isopropenyl Functionality.
Authors: SILVESTRI M. G. , BEDNARSKI P. J. , KHO E.
Published: May 2016

Der aus trans‐9‐Methyl‐ 2‐decalon (I) mit (II) gut zugängliche Aldehyd (III) wird ins p‐Tosylhydrazon (IV) übergeführt.
ChemInform Abstract: Spectroscopic Characterization of a Molybdena/Silica System Photoreduced in a Carbon Monoxide Atmosphere.
Authors: GUGLIELMINOTTI E. , GIAMELLO E.
Published: May 2016

Die CO‐Adsorption des bei 823 K mit H2 reduzierten MoO3/SiO2‐Systems wird durch IR‐, UV‐ VIS‐ und ESR‐Techniken untersucht, wodurch die Bildung von Mo(V)‐ und Mo(IV)‐Spezies aufgezeigt wird.
ChemInform Abstract: Thiazyl Pentafluorooxotellurate, NSOTeF5.
Authors: HOPPENHEIT R. , MEWS R.
Published: May 2016

Das auf den zwei im Formelschema skizzierten Wegen dargestellte neue Fluorooxotellurat (III) ist äußerst instabil und lagert sich oberhalb ‐ 50°C unter Bildung des bereits beschriebenen Isomeren (IV) und polymeren Produkten um.
ChemInform Abstract: Metal Complexes of Vitamin B6 Related Compounds. Crystal and Molecular Structures of Aqua(5′‐phosphopyridoxylideneglycinato)copper(II) Trihydrate and Bis(pyridoxylideneglycinato)nickel(II) Hexahydrate.
Authors: RAO S. P. S. , MANOHAR H. , BAU R.
Published: May 2016

(I) kristallisiert mit Z=2 in der RG PT und (II) mit Z=8 in der RG Pnna.
ChemInform Abstract: Effect of Different Dialkylamino Groups on the Regioselectivity of Lithiation of O‐Protected 3‐(Dialkylamino)phenols.
Authors: SKOWRONSKA‐PTASINSKA M. , VERBOOM W. , REINHOUDT D. N.
Published: May 2016

Die Lithiierung von 3‐Methoxy‐ (Ia), 3‐Methoxymethoxy‐ (Ib) und 3‐[(Diethylcarbamoyl)oxy]‐N,N‐dialkylaniline (Ic) und "ihre Umsetzung mit Elektrophilen wie DMF, Methyliodid oder Trimethylchlorsilan′ zu den Produkten (II) und (III) wird untersucht.
ChemInform Abstract: Intramolecular Diels‐Alder Reaction of 1‐Nitrodeca‐1,6,8‐trienes.
Authors: KURTH M. J. , O'BRIEN M. J. , HOPE H. , YANUCK M.
Published: May 2016

Die intramolekulare Diels‐Alder‐Reaktion der E‐ und Z‐Nitrodecatriene (I) bzw. (IV), deren Herstellung beschrieben wird, führt zu Gemischen der Hexahydroindene (II) und (III) bzw. (V) und (VI).
ChemInform Abstract: Synthesis, Solvolysis Kinetics and Antileukemic Effect of 1‐Diazo‐3‐(2′‐thiohetaryl)alkane‐2‐ons.
Authors: KARTSEV V. G. , POKIDOVA T. S. , DENISOVA T. G. , VASIL'EVA L. S.
Published: May 2016

Die Thiole (I), (V) und (VIII) reagieren mit Brom‐diazoaceton (II) zu den Hetarylmercaptodiazoacetonen (III), (VI) und (IX), welche mit Perchlorsäure zu den tricyclischen Salzen (IV), (VII) und (X) cyclisiert werden.
ChemInform Abstract: Reaction of Perfluoroalkyl Iodides with Electron Donor Nucleophiles.
Authors: FEIRING A. E.
Published: May 2016

Perfluoralkyliodide (I) addieren sich radikalisch in Gegenwart von Na‐sulfinaten (III) an Olefine unter Bildung der Addukte (IV), (V) und (IX); daneben werden auch teilweise die Eliminierungsprodukte (X) isoliert.
ChemInform Abstract: Functionalisation of Saturated Hydrocarbons. Part 3. Oxidation of 3β,5α,6β‐Triacetoxycholestane Using the Gif System.
Authors: BARTON D. H. R. , GOEKTUERK A. K. + , JANKOWSKI K.
Published: May 2016

Die Nebenprodukte bei der bekannten Oxidation des Titelsteroids (I) mit dem Gif‐System (Fe‐Cluster/ metallisches Zn/ Pyridin/(wäßrige) Essigsäure/Triplett‐Sauerstoff), die zu den Hauptprodukten (III) und (IIa) führt, werden identifiziert: Es werden außerdem die verschiedenen Ketone (IIb) sowie die Verbindungen (IVa), (IVb) + (IVc) [durch Weiteroxidation von (IVa)], (V) und (VI) gefunden.
ChemInform Abstract: Mild Hydrogen‐Transfer Reductions Using Sodium Hypophosphite.
Authors: BOYER S. K. , BACH J. , MCKENNA J. , JAGDMANN E. JUN.
Published: May 2016

An zahlreichen Modellverbindungen wird die Reduktion von Carbonylverbindungen, Olefinen, N‐Oxiden, Aziden und Epoxiden sowie die Hydrogenolyse von Organo‐Chlorverbin‐ dungen und Benzylethern mit Natriumhypophosphit in Gegenwart von Pd/Kohle untersucht.
ChemInform Abstract: Reactions of Tetrafluoroethene Oligomers. Part 3. Some Reactions of Tetrafluoroethene Hexamer with Nitrogenous Bases.
Authors: COE P. L. , SELLARS A. , TATLOW J. C.
Published: May 2016

Das Tetrafluorethen‐Hexamer (I) reagiert mit NH3 zu dem Nitril (II) und mit prim. Aminen bzw. mit Hydrazin zu den stabilen Keteniminen (IIIa)‐(IIId).
ChemInform Abstract: The Ruthenium‐Catalysed Conversion of Methanol into Methyl Formate.
Authors: SMITH T. A. , APLIN R. P. , MAITLIS P. M.
Published: May 2016

Unter Ruthenium‐Katalyse wird Methanol (I) zu Ameisensäuremethylester (III) neben geringen Mengen an Dimethoxymethan (IV) umgesetzt.
ChemInform Abstract: Chalcogenolates. Part 157. Reaction of N‐Methyl Thioformamide with Carbon Disulfide.
Authors: GERNER R. , GATTOW G.
Published: May 2016

Durch Reaktion von N‐Methylthioformamid (III) mit CS2 (IV) in Gegenwart der Alkalimetallhydroxide (V) lassen sich die Salze (VIa) und (VIb) (intensiv rot) herstellen.
ChemInform Abstract: Reduction of Vinylogous Thioesters with Lithium Aluminum Hydride.
Authors: MATOBA K. , MORITA T. , YAMAZAKI T.
Published: May 2016

Die aus den Dionen (I) über die Bromide (II) dargestellten vinylogen Thioester (III) werden zu cis/trans‐Gemischen der Cyclopentenole (IV) reduziert.
ChemInform Abstract: Intramolecular Routes to Hydrindanes: The Diels‐Alder and Michael‐Aldol Approach to 6‐Isopropyl‐9‐methylbicyclo[4.3.0]nonan‐3‐one.
Authors: ATTAH‐POKU S. K. , CHAU F. , YADAV V. K. , FALLIS A. G.
Published: May 2016

Ausgehend vom Aldehyd (I) wird die im Titel genannte Verbindung (V) auf zwei Wegen hergestellt.
ChemInform Abstract: Synthetic Approach to (+)‐Aldosterone and Its Relatives. Part 1.
Authors: NEMOTO H. , NAGAI M. , FUKUMOTO K. , KAMETANI T.
Published: May 2016

Man erhält die im Titel genannte Verbindung (X) in optisch reiner Form ausgehend von dem Lacton (I) und dem cyclischen S,S‐Aceta1 (II) nach dem angegebenen Formelschema.
ChemInform Abstract: 4‐Amino‐4,5‐dihydrothiophene‐2‐carboxylic Acid.
Authors: ADAMS J. L. , CHEN T.‐M. , METCALF B. W.
Published: May 2016

Ausgehend von Cysteinethylester (I) wird zunächst das N,S‐geschützte Derivat (II) hergestellt, das bei der Dieckmann‐Cyclisierung das Tetrahydrothiophen‐Derivat (III) ergibt.
ChemInform Abstract: Ozonolysis of Enol Ethers. Formation of 3‐Alkoxy‐l ,2‐dioxolanes by Concerted Addition of a Carbonyl Oxide to an Enol Ether.
Authors: KEUL H. , CHOI H.‐S. , KUCZKOWSKI R. L.
Published: May 2016

Untersucht wird die Produktverteilung bei der Ozonolyse der Keten‐acetale (I) bei ‐78°C in verschiedenen Solventien.
ChemInform Abstract: Synthesis and Biological Activity of 1,3,4‐Substituted Pyrazoline‐5‐ons.
Authors: VARTANYAN S. A. , VARTANYAN R. S. , KARAMYAN S. A. , AVETYAN L. O. , APOYAN N. A. , MELKONYAN ZH. S.
Published: May 2016

Wie im Formelschema beschrieben, werden aus den cyclischen Ketonen (I) die Hydrazine (Va) und (Vb) erhalten.
ChemInform Abstract: Alkylation of 4‐Hydroxycoumarins by Ketone Mannich Bases. Synthesis of 4‐Hydroxy‐2‐oxo‐3‐(3‐oxoalkyl)‐2H‐1‐benzopyrans.
Authors: BRAVO P. , TICOZZI C. , CAVICCHIO G.
Published: May 2016

4‐Hydroxycumarine (I) reagieren mit den Mannich‐Basen (II) oder Dimethylamin und Vinylketonen (III) zu 3‐(3‐ OxoalkyD‐cumarinen (IV), die durch Wittig‐Olefmierung in 3‐(3‐Butenyl)‐cumarine (VI) übergeführt werden.
ChemInform Abstract: Nucleophilic Displacement of N‐Aryl and Heteroaryl Groups. Part 7.
Authors: KATRITZKY A. R. , COZENS A. J. , OSSANA A. , RUBIO O. , DABBAS N.
Published: May 2016

Die durch Hydrolyse der 2‐Ethoxycarbonyl‐pyridinium‐Salze erhaltenen Betaine (I) gehen die im Formelschema beschriebenen Reaktionen unter Bildung der Verbindungen (II), (IV), (VI), (VIII), (X) und (XI) ein.
ChemInform Abstract: Synthesis of 4H‐Benzo[hi]pyrrolo[2,l ,5‐cd]indolizin‐4‐one. A Novel Type of Phenalenone Analog.
Authors: NOGUCHI M. , TANIGAWA N. , TAMAMOTO T. , KAJIGAESHI S.
Published: May 2016

Die Phenalenonanaloga (II) werden wie beschrieben erhalten.
ChemInform Abstract: Studies on Quinolizine Derivatives. Part 18. Syntheses of Azabenzocycl[3.3.3]azine Derivatives.
Authors: KURATA K. , AWAYA H. , GOTOU H. , TOMINAGA Y. , MATSUDA Y. , KOBAYASHI G.
Published: May 2016

Die durch Kondensation der Isochinoline (I) mit dem Dinitril (II) entstehenden Imino‐Derivate (III) und (IV) reagieren mit dem Acetylendicarbonsäuredimethylester (V) zu den Cyclazinen (VI)‐(VIIIa).
ChemInform Abstract: 4‐Methoxy‐7,8‐dihydro‐l ,3‐diazaphenthiazine Derivatives and Their Neurotropic Activity.
Authors: NEMERYUK M. P. , TOLOKONTSEVA T. S. , YADROVSKAYA V. A. , POLEZHAEVA A. I. , PETROVA G. A. , SAFONOVA T. S. , MASHKOVSKII M. D.
Published: May 2016

Das Diketon (I) reagiert über die Enamine (III) mit N‐Bromsuccinimid (IV) zu den Brom‐amino‐ketonen (V), die mit dem Pyrimidin (VI) nach bereits frü‐ her beschriebenen Methoden zu den Phenothiazinen (VII) kondensiert werden.
ChemInform Abstract: Specific Inhibitors in Vitamin Biosynthesis. Part 9. Reactions of 7,7‐Dialkyl‐7,8‐ dihydropteridines of Use in the Synthesis of Potential Inhibitors of Tetrahydrofolate Biosynthesis.
Authors: AL‐HASSAN S. S. , CAMERON R. , NICHOLSON S. H. , ROBINSON D. H. , SUCKLING C. J. , WOOD H. C. S.
Published: May 2016

Im Hinblick auf die Möglichkeit, Substanzen mit Inhibitorwirkung gegenüber 6‐Hydroxymethyl‐7,8‐dihydropterin‐Pyrophosphokinase und Dihydrofolat‐Reduktase zu erhalten, werden am Pyrazinring einer Reihe von 7,7‐Dialkyl‐7,8‐dihydropteridinen Modifikationen der Substituenten untersucht.
ChemInform Abstract: Synthesis and Pharmacological Study of Polyfunctional Macroheterocycles.
Authors: VORONKOV M. G. , KUZNETSOV I. G. , SUSLOVA S. K. , TIZENBERG G. M. , KNUTOV V. I. , BUTIN M. K.
Published: May 2016

Durch Kondensation der Diamine (I) mit Phthalsäure‐dichlorid (II) nach früher beschriebenen Methoden werden die Makrocyclen (III) erhalten, von denen (IIIa) antiulcerogen bei Histamin‐induzierten Geschwüren wirkt.
ChemInform Abstract: L‐Cysteine‐, L‐Methionine‐ and D‐Penicillamine‐Derived Ligands for Transition Metal Catalyzed Carbon‐Carbon Bond Forming Reactions.
Authors: GRIFFIN J. H. , KELLOGG R. M.
Published: May 2016

Ausgehend von den im Titel genannten Aminosäuren werden gemäß der im Schema angegebenen Synthesesequenzen die chiralen Phosphine (IV), (VIII) und (XIII) hergestellt.
ChemInform Abstract: Chemistry of Phosphorus. Part 152. Functionalized Cyclotriphosphanes of the Type (t‐BuP)2PX (X: K, SiMe3, SnMe3, Cl, Br, PCl2, P(t‐Bu)Cl, P(t‐Bu)I).
Authors: BAUDLER M. , MAKOWKA B.
Published: May 2016

Aus dem Cyclotetraphosphan (I) erhält man das Cyclotriphosphan (II), von dem ausgehend die P‐Cyclen (IV), (VIII) und (X) zugänglich sind.
ChemInform Abstract: Triphenyltelluronium β‐Diketonates. Synthesis and Spectra.
Authors: KHANDELWAL B. L. , SINGH A. K. , SINGH H. B. , PRASAD K. M. , BHANDARI N. S. , MCWHINNIE W. R.
Published: May 2016

Aus den Diketonen (I) und dem Tellurchlorid (II) werden die Tellurverbindungen (III) hergestellt.
ChemInform Abstract: Generation of (1‐Alkoxycyclopropyl)lithium Reagents.
Authors: GADWOOD R. C. , RUBINO M. R. , NAGARAJAN S. C. , MICHEL S. T.
Published: May 2016

Als potentielle Vorstufen zur Erzeugung der im Titel genannten Reagentien werden die Cyclopropane (III), (IX), (XII) und (XIV) hergestellt und auf ihre praktische Verwendbarkeit untersucht.
ChemInform Abstract: A Simple Synthesis of 3‐Tributylstannylfuran and 3‐Lithiofuran.
Authors: FLEMING I. , TADDEI M.
Published: May 2016

Die Addition des Stannyl‐cuprats (II) an 2‐Butin‐l ,4‐diol (I) ergibt stereospezifisch das E‐Stannylbutendiol (III), dessen Oxidation zum 3‐Stannylfuran (IV) führt.
ChemInform Abstract: Crystal Structure and Spectroscopic and Redox Properties of the Iron ‐ Sulphur Cluster Compound [NEt4]2[Fe4S4(SC6H4NH2‐4)4].
Authors: OLLERENSHAW T. J. , GARNER C. D. , ODELL B. , CLEGG W.
Published: May 2016

Die Titelverbindung (I), ein 4‐Fe‐Ferredoxin‐Analoges, wird über die zwei aufgezeichneten Reaktionswege dargestellt und durch eine Röntgenstrukturanalyse (RG PÄ2,c, Z=2), UV/VIS‐ und 1H‐ sowie 13C‐NMR‐spektroskopische und elektrochemische Untersuchungen charakterisiert.
ChemInform Abstract: Routes of Formation and Crystal Structure of an Alkylperoxycobaloxime: Bis[dimethylglyoximato(1‐)](4‐ethoxycarbonylbut‐3‐en‐2‐yl‐peroxo)(pyridine)cobalt(III).
Authors: ALCOCK N. W. , GOLDING B. T. , MWESIGYE‐KIBENDE S.
Published: May 2016

Alkylcobaloxime wie (Ia) oder (Ib) führen durch photolytische Oxidation zu (II), das auch aus (III) oder (IV) durch Reaktion mit Pyridin‐cobaloxim(I) und nachfolgende Oxidation mit O2 erhalten wird.
ChemInform Abstract: Theophylline Adducts with Some Divalent 3d Metal Perchlorates.
Authors: MIKULSKI C. M. , KURLAN M. K. , GROSSMAN S. , BAYNE M. , KARAYANNIS N. M.
Published: May 2016

Die l.2:2.5‐molare Umsetzung der entsprechenden Metall(II)‐perchlorathydrate mit Theophyllin in siedendem Ethylacetat/Triethylorthoformiat führt zu den vier‐, fünf‐ bzw. sechsfach‐koordinierten Komplexen (I), (II) oder (III).
ChemInform Abstract: Ruthenium(III) and Ruthenium(II) Complexes with 6‐Mercaptopurine.
Authors: GRIGORATOS A. , KATSAROS N.
Published: May 2016

Aus den Reaktionsmischungen siedender ethanolischer Lösungen der Metallchloride mit 6‐Mercaptopurin werden die Komplexe (I)‐(IV) isoliert (keine Ausb.‐Angabe).
ChemInform Abstract: Chemistry of Di‐ and Tri‐metal Complexes with Bridging Carbene or Carbyne Ligands.
Authors: AWANG M. R. , BARR R. D. , GREEN M. , HOWARD J. A. K. , MARDER T. B. , STONE F. G. A.
Published: May 2016

Die Reaktion von (I) bzw. (IV) mit (II) liefert die Vinylbrückenkomplexe (III) bzw. (V), wobei die Ausb. von (IIIa) sich mit den Reaktionsbedingungen ändert.
ChemInform Abstract: Preparation and Crystal Structure of Bis(acetato)(trans‐1,2‐diaminocyclohexane)‐platinum(II).
Authors: ROCHON F. D. , MELANSON R. , MACQUET J.‐P. , BELANGER‐GARIEPY F. , BEAUCHAMP A. L.
Published: May 2016

Die racemische Titelverbindung, die in der RG Aba2 mit Z=8 kristallisiert, wird durch Reaktion des entsprechenden Chlorokomplexes mit Ag(CH3COO) dargestellt.
ChemInform Abstract: Acid‐catalysed Rearrangement of Terpinolene Oxide.
Authors: GURUDUTT K. N. , PASHA M. A. , RAVINDRANATH B.
Published: May 2016

Die Titelreaktion von (I) unter den Bedingungen A) und B) ergibt die im Formelschema angegebenen Produktverteilungen (Bildungsmechanismen).
ChemInform Abstract: Preparation of 17α‐Acetoxypregn‐4‐ene‐3β‐ol‐20‐on and Experimental Study of Its Effect on Reproductive Function.
Authors: KORKHOV V. V. , BOIKOVA V. V. , GRINENKO G. S.
Published: May 2016

Durch Reduktion von Acetoxyprogesteron (I) erhält man die im Titel genannte Verbindung (II), die nur zusammen mit Mestranol eine ausgeprägte kontrazeptive Wirkung zeigt.
ChemInform Abstract: Synthesis and Antiviral Activity of Gossypol Derivatives.
Authors: AUELBEKOV S. A. , MIRZAABDULLAEV A. B. , ASLANOVA D. KH. , KUCHKAROV S. , ACHILOVA G. SH.
Published: May 2016

Gossypol (I) reagiert auf bekannte Weise mit Hydrazinen bzw. Arninen zu Hydrazonen bzw. Schiffschen Basen (II).
ChemInform Abstract: Synthesis of 1‐Methyl‐ and 1α,2α‐Methylene‐gibberellins.
Authors: MACMILLAN J. , WILLIS C. L.
Published: May 2016

Mit dem Enon (Ia), dem durch Reduktion von (Ib) zugänglichen Cyclopropylderivat (Va) und Gibberellin A3 (VI) (= GA3) als Ausgangssubstanzen lassen sich die gewünschten Titelverbindungen (IIIc), (IIId), (IIIg), (IVb), (IVd), (Vb) und (Ve) auf den beschriebenen Wegen synthetisieren (Ausb.‐Angaben in mg).
ChemInform Abstract: Electrochemistry of Molten Calcium Nitrate Tetrahydrate.
Authors: JOHNSON K. E. , YERHOFF F. W.
Published: May 2016

Die elektrochemischen Eigenschaften von Ca(NO3)2 ‐ 4 H2O werden durch Voltammetrie, Coulometrie und chemische Analysen untersucht.
ChemInform Abstract: Copper Electrodeposition onto Moving High Resistance Electroless Films.
Authors: D'AMICO J. F. , DEANGELO M. A. , MCLARNON F. R.
Published: May 2016

Untersucht wird die elektrolytische Cu‐Abscheidung aus einem wäßrigen CuSO4‐ H2SO4‐Elektrolyten an einem sich bewegenden hochohmigen Substrat (mit Cu‐beschichtetes Polyimid wird über Edelstahlrollen durch die Zelle geführt; eine genaue Beschreibung der Zelle liegt vor).
ChemInform Abstract: Growth Mechanism of Silicon Plasma Anodic Nitridation.
Authors: HIRAYAMA M. , MATSUKAWA T. , ARIMA H. , OHNO Y. , NAKATA H.
Published: May 2016

Die Wachstumskinetik und die Aktivierungsenergie der Nitridbildung auf B‐dotierten (100)‐Si‐Proben in einem Nz/Hz‐Plasma werden untersucht (13.56 MHz HF‐Oszillator, 680‐920°C).
ChemInform Abstract: Sterically Hindered Triplet Energy Transfer.
Authors: SCAIANO J. C. , LEIGH W. J. , MEADOR M. A. , WAGNER P. J.
Published: May 2016

Im Gegensatz zu früheren Auffassungen weist die Verzögerung der Triplettlöschung beim Übergang von (Ia) über (Ib) zu (Ic) von 4.8‐ 109 auf O.8‐ 109/ M ‐ s (durch 2,5‐Dimethyl‐2,4‐hexadien in Chlorbenzol) auf einen sterischen Effekt der o‐Gruppe hin.
ChemInform Abstract: On the Stereochemistry of Vitamin D3 Epoxides X‐Ray Structure Analysis of 5,6‐7,8‐10,19‐Trisepoxide.
Authors: BERNHARD H. , KRATKY C. , REISCHL W. , ZBIRAL E.
Published: May 2016

Die Epoxidierung von Vitamin D3 (I) mit dem Payne‐ Reagens liefert ausschließlich das 5,6‐7,8‐10,19‐Tris‐epoxid (II), wie durch Röntgenanalyse eines Einkristalls des p‐Brombenzoats (III) gefunden wird.
ChemInform Abstract: Electrolytic Studies on Vinyl Azides. Part 3. Electrolysis of Substituted α‐Azidocinnamic‐ and Azidoacrylic Esters.
Authors: KNITTEL D.
Published: May 2016

Bei der kathodischen Reduktion der Azide (I) entstehen in Gegenwart von Ac2O (unter aprotischen Bedingungen) die N,N‐Di‐ acetyl‐a‐amino‐zimtsäureester (II), in Gegenwart von AcOH dagegen die Aminoester (IV).
ChemInform Abstract: Addition of Malonic Acid Derivatives to Cyclic β‐Enaminones.
Authors: BELLASSOUED‐FARGEAU M.‐C. , GRAFFE B. , SACQUET M.‐C. , MAITTE P.
Published: May 2016

Aus den Enamino‐ketonen (I) erhält man mit den aktiven Methylenverbindungen (II) die anellierten Pyrone (III).
ChemInform Abstract: Application of the Photo‐Fries Rearrangement of Aryl Dihydrocinnamates to the Synthesis of Flavonoids.
Authors: GARCIA H. , IBORRA S. , MIRANDA M. A. , PRIMO J.
Published: May 2016

Die Photo‐Fries‐Umlagerung der Zimtsäurearylester (Ia) zu (IIa) läuft nur mit schlechten Ausbeuten ab.
ChemInform Abstract: Production of 3‐Methylbutene‐l by Disproportionation of 4‐Methylpentene‐2.
Authors: TIMOFEEV A. V. , ROMANCHENKO L. YA. , SHUMOSVKY V. G. , PANCHENKO M. I. , ATLAS V. V. , ANSHELES V. R.
Published: May 2016

Untersucht wird die Metathese von 4‐Methylpenten‐2 (I) und Ethylen (II) zu 3‐Methyl‐buten‐l (III) und Propyen (IV).
ChemInform Abstract: The Chemical Reactivity of 2,2,3,3‐Tetramethyl‐1‐aziridinecarboximidate.
Authors: JUNG S.‐H. , KOHN H.
Published: May 2016

Die Iso‐ b merisierung des Aziridin‐carboximidats (I) führt nicht zu entsprechenden Imidazolen, sondern zu den offenkettigen Produkten (II), (IIIa) und (IIIb).
ChemInform Abstract: Pyrylium Compounds. Part 29. Substituted Benzophenones from 2,4,6‐Triarylpyrylium Salts and Methyl(ene) Ketones.
Authors: ZIMMERMANN T. , FISCHER G. W.
Published: May 2016

Die Salze (I) reagieren mit den Ketonen (II) unter Bildung der Benzophenone (III).
ChemInform Abstract: Synthesis of (E)‐ and (Z)‐1‐Amino‐2‐aryl(methyl)cyclopropanecarboxylic Acids via Spirooxazolones.
Authors: ARENAL I. , BERNABE M. , FERNANDEZ‐ALVAREZ E. , PENADES S.
Published: May 2016

4‐Alkyliden‐oxazolone (I) werden mit Diazomethan in die Spiroverbindungen (II) übergeführt, deren saure Hydrolyse zur Spaltung des Cyclopropanringes führt.
ChemInform Abstract: Some Preparatively Useful [4 + 2]Cycloadditions of 6,6‐Diphenylfulvene.
Authors: SIEGEL H.
Published: May 2016

Die Cycloaddition von 6,6‐Diphenylfulven (I) an Dienophile (II) führt zu einem Gemisch der endo‐ und exo‐Addukte (III) und (IV).
ChemInform Abstract: Syntheses of 3(5)‐Substituted‐4‐(N‐Methylanilino)‐5(3)‐aminopyrazoles by Reaction of β‐Hydroxy‐α‐cyano‐enamines with Hydrazines.
Authors: TAKAHASHI K. , SHIBASAKI K. , OGURA K. , IIDA H.
Published: May 2016

Die aus N‐Methylanilinoacetonitril (I) und Estern (II) zugänglichen Enamine (III) reagieren mit Hydrazinen (I V) zu den Aminopyrazolen (V) und (VI).
ChemInform Abstract: Preparation and Thermal Properties of 2‐Aryl‐5‐benzoylthio‐1,3,4‐oxadiazoles.
Authors: SAEGUSA Y. , AKANO N. , NAKAMURA S. , CHAU N. , IWAKURA Y.
Published: May 2016

Bei tiefer Temperatur (‐50°C) erfolgt die Benzoylierung der Oxadiazolin‐thione (I) selektiv am Schwefel unter Bildung der Thiolester (III).
ChemInform Abstract: Reduction of Pheny1‐Substituted Pyridinium Methoiodides with Sodium Borohydride.
Authors: GESSNER W. , BROSSI A.
Published: May 2016

Bei der Reduktion der im Titel genannten Verbindungen (I) mit NaBH4 in Wasser werden neben den Tetrahydropyridinen (II) die Amin‐Bor‐an‐Komplexe (III) erhalten.
ChemInform Abstract: Cyanide‐Ion‐Catalyzed Reaction of Pentafluorophenyltrimethylsilane with Substituted Acetophenones.
Authors: VYAZANKINA O. A. , GOSTEVSKII B. A. , VYAZANKIN N. S.
Published: May 2016

Die Reaktion des Silans (I) mit den Acetophenonen (II) liefert je nach Substitutionsmuster die Silylether (III) oder die Enolether (IV).
ChemInform Abstract: 2‐Azapyrylium Salts from Aluminum Halide c5 Complexes of Cyclobutadienes and NOCl.
Authors: BROXTERMAN Q. B. , HOGEVEEN H. , KINGMA R. F. , VAN BOLHUIS F.
Published: May 2016

Die Reaktion der o‐Aluminiumhalogenid‐Cyclobutadien‐Komplexe (I) mit NOCl liefert Z‐Azapyryliumsalze (II).
ChemInform Abstract: Hindered Ligand Movements in Transition Metal Complexes. Part 26.
Authors: MICHAEL G. , KAUB J. , KREITER C. G.
Published: May 2016

Die Cr(O)‐Komplexe (I) ergeben mit 1,3‐Cycloheptadien (II) bei UV‐Bestrahlung die Titelkomplexe (III).
ChemInform Abstract: Preparation, Structure, and Coordination Chemistry of Mo[S‐2,4,6‐C6H2(CHMe2)3]4.
Authors: ROLAND E. , WALBORSKY E. C. , DEWAN J. C. , SCHROCK R. R.
Published: May 2016

Der aus MoCl4 und Trimethylsilyl‐2,4,6‐triisopropylbenzolthiolat gebildete, luft‐ und feuchtigkeitsempfindliche, paramagnetische Chloro‐ Mo(V)‐Komplex (I) wird von Na‐amalgam unter Bildung des kristallinen, diama gnetischen Titelkomplexes (II) reduziert.
ChemInform Abstract: Preparation and Properties of, and Reactions with, Metal‐Containing Heterocycles.
Authors: LINDNER E. , SCHAUSS E. , HILLER W. , FAWZI R.
Published: May 2016

Durch nucleophile Eliminierungs‐ Cycloadditionen an den Bis‐(triflaten) (I), (IV) und (V‐I) mit den Anionen (II) erhält ′ man die Komplexe (III), die Ferracyclopentane (V) und Ferrahydrindane (VII).