bluuebunny/crossref_metadata_2025_split huggingface dataset:
QBO modulation of the mesopause gravity wave momentum flux over Tierra del Fuego
Authors: de Wit R. J. , Janches D. , Fritts D. C. , Hibbins R. E. 
Published: April 2016

AbstractThe interannual variability of the mesosphere and lower thermosphere (MLT) gravity wave momentum flux over southern midlatitudes (53.7°S) has been studied using more than 7 years of meteor radar observations at Río Grande, Argentina. A modulation, with periods similar to that of the equatorial stratospheric quasi‐biennial oscillation (QBO), is observed in the vertical flux of zonal as well as meridional momentum. The QBO signal is largest in the zonal component during summer and is in phase with the stratospheric QBO at 50 hPa (∼21 km). The relation between the stratospheric QBO and the QBO modulation in the MLT gravity wave forcing (derived from the divergence of the momentum flux) was found to be consistent with that expected from the Holton‐Tan effect coupled to the interhemispheric coupling mechanism. These results provide the first observational support for the existence of the midlatitude gravity wave forcing anomalies as hypothesized in the interhemispheric coupling mechanism.
Exploring Integrated Geophysics and Geotechnics as a Paleolandscape Reconstruction Tool: Archaeological Prospection of (Prehistoric) Sites Buried Deeply below the Scheldt Polders (NW Belgium)
Authors: Verhegge Jeroen , Missiaen Tine , Crombé Philippe 
Published: April 2016

AbstractDuring extensive construction works in Antwerp harbour, well preserved Late Glacial dune formations were discovered buried deeply below the Scheldt polders and covered by peat, organic matter (OM) rich clays and marine clayey to sandy sediments. First, coring based archaeological prospection strategies for evaluating prehistoric occupation levels in wetland landscapes are reviewed. Next, a more effective approach including near surface geophysical and geotechnical techniques is proposed and tested in Doelpolder Noord. The results indicate that high resolution electromagnetic induction survey at multiple coil spacing provides a suitable approximation of the prehistoric landscape variability but is challenged by variations in groundwater brackishness. Gridded cone penetration tests provide a solution in such cases and serve as an excellent interpretation tool for the conductivity data in general. Due to the required effort, electrical resistance imaging and shear wave land seismics were judged inefficient. Finally, a small dune with indications of paleosol conservation and estimated suitability for Final Palaeolithic to Early Neolithic occupation is sampled by Dutch hand augering and Sonic Drill Aqualock coring. Archaeological indicators for prehistoric occupation such as burnt bone and flint fragments were retrieved from these samples after sieving. Copyright © 2016 John Wiley & Sons, Ltd.
Slingram EMI Devices for Characterizing Resistive Features Using Apparent Conductivity Measurements: check of the DualEM‐421S Instrument and Field Tests
Authors: Dabas Michel , Anest Antoine , Thiesson Julien , Tabbagh Alain 
Published: April 2016

AbstractThis article addresses the characterization of resistive archaeological targets and near surface structures by electromagnetic induction (EMI). It presents tests achieved with the DualEM‐421S instrument (Dualem Inc., Milton, Canada) in order to be able to quantitatively compare these measurements to the standard technique of direct‐current (d.c.) resistivity. The test was done over the Gallo‐roman site of Vieil‐Evreux in Normandy, France and one‐dimensional (1D) and three‐dimensional (3D) inversions were applied to the data set obtained.We have first investigated the signal‐to‐noise ratio of each of the six DualEM receiver coils both in a static mode and for a quad‐pulled system. The dependence on the roll angle was also measured and it is shown that rotation of DualEM must be taken into account if the roll angle is more than ±10°. Absolute calibration and in‐phase/quadrature (out of phase) component discrimination was checked by measuring the response of a small conductive and non‐magnetic sphere. Several electromagnetic soundings by measuring the instrument response at different heights were done in order to check the quadrature (out‐of‐phase) response of the instrument. Inversions of these electromagnetic soundings were compared to d.c. vertical electric soundings (VESs) over four locations and found in accordance. Several maps using different coil configurations (HCP, VCP, PERP) and different heights were performed and inverted, both for a wide mesh (5 m) and for a finer one (0.5 m). The wide mesh allows a global and rapid description of the surface geology context (continuous d.c. measurements cannot deliver equivalent depth of investigation). The fine mesh conductivity maps clearly show the walls of afanum(temple) as well as other structures and prove that the DualEM‐421S is able to map correctly archaeological resistive targets. These maps and their interpretations were compared to previous results obtained by d.c. technique. Copyright © 2016 John Wiley & Sons, Ltd.
Cyclodextrins as Protective Agents of Protein Aggregation: An Overview
Authors: Oliveri Valentina , Vecchio Graziella 
Published: April 2016

AbstractCyclodextrins are extensively used in different fields (e.g., catalysis, chromatography, pharma, supramolecular chemistry, bioorganic chemistry, and bioinorganic chemistry), and their applications have been widely reviewed. Their main application in the field of pharmaceutical is as a drug carrier. This review overviews, for the first time, the use of cyclodextrins and their derivatives as antiaggregant agents in a number of proteins (e.g., amyloid‐β, insulin, recombinant human growth hormone, prion protein, transthyretin, and α‐synuclein) and some multimeric enzymes. There are many diseases that are correlated to protein misfolding and amyloid formation processes affecting numerous organs and tissues. There are over 30 different amyloid proteins and a number of corresponding diseases. Alzheimer's disease is the most common neurodegenerative disease. Treatment of these diseases is still a goal to reach, and many molecules are studied in this perspective. Cyclodextrins have also been studied, and they show great potential; as such, further studies could be very promising. This review aims to be a stimulus for the design of new cyclodextrin derivatives to obtain multifunctional systems with antiaggregant activity.
Organocatalytic Enantioselective Synthesis of Pyrazoles Bearing a Quaternary Stereocenter
Authors: Vila Carlos , Amr Fares Ibrahim , Blay Gonzalo , Muñoz M. Carmen , Pedro José R. 
Published: April 2016

AbstractAn efficient one‐pot asymmetric synthesis of pyrazoles bearing a chiral quaternary stereocenter has been developed. Quinine‐derived thiourea catalyzed the enantioselective addition of pyrazolones to isatin‐derived ketimines, providing the corresponding acetylated pyrazoles after in situ treatment with Ac2O/Et3N. The corresponding pyrazoles were afforded in high yields and excellent enantioselectivities.
DNA Origami Seesaws as Comparative Binding Assay
Authors: Nickels Philipp C. , Høiberg Hans C. , Simmel Stephanie S. , Holzmeister Phil , Tinnefeld Philip , Liedl Tim 
Published: April 2016

AbstractThe application of commonly used force spectroscopy in biological systems is often limited by the need for an invasive tether connecting the molecules of interest to a bead or cantilever tip. Here we present a DNA origami‐based prototype in a comparative binding assay. It has the advantage of in situ readout without any physical connection to the macroscopic world. The seesaw‐like structure has a lever that is able to move freely relative to its base. Binding partners on each side force the structure into discrete and distinguishable conformations. Model experiments with competing DNA hybridisation reactions yielded a drastic shift towards the conformation with the stronger binding interaction. With reference DNA duplexes of tuneable length on one side, this device can be used to measure ligand interactions in comparative assays.
Intraprocedural assessment of mitral regurgitation during the mitraclip procedure: Impact of continuous left atrial pressure monitoring
Authors: Horstkotte Jan , Kloeser C. , Beucher H. , Schwarzlaender E. , von Bardeleben R. S. , Boekstegers P. 
Published: April 2016

IntroductionIntraprocedural assessment of mitral regurgitation (MR) is a challenging issue during the MitraClip procedure, which might influence not only the position but also the number of MitraClips implanted. Though transesophageal echocardiography (TEE) is the predominant tool used during the MitraClip procedure, MR assessment might be facilitated by a multimodality approach including continuous and simultaneous determination of left atrial and left ventricular (LV) pressure.Methods86 consecutive patients (76.5 ± 8 years) who qualified for the MitraClip procedure were included into the study. In all patients, the multimodal assessment of MR (TEE, LV angiogram, TEE bubble evaluation, left atrial (LA) pressure => MitraScore) was performed after introducing the MitraClip guide catheter. In the first 42 patients (group A, no CAP), left atrial (LA) pressure (peak pressure of V‐wave) was determined only before and after MitraClip implantation, whereas, in the subsequent 44 patients (group B, with CAP), continuous left atrial pressure monitoring (CAP) was performed.ResultsPatients with CAP (group B) had similar total procedural durations and no increase in the complication rate. MitraScore decreased from 10.5 to 3.5 in group A compared to 10.7 to *2.8 in group B (*P = 0.021 vs. group B). Whether the significant improvement of intraprocedural MR in group B translated into superior MR reduction in the conscious patient, was analyzed by transthoracic echocardiography (TTE) in a blinded fashion. Again MR reduction was significantly greater (P = 0.03) in group B (MR grade 2.8 to 0.9) as compared to group A (MR grade 2.8 to 1.3) and 2D vena contracta decreased from 0.54 ± 0.15 cm to 0.17 ± 0.10 in group B compared to group A (0.56 ± 0.19 cm to *0.23 ± 0.12; *P = 0.01 vs. group B).ConclusionsMultimodality assessment of intraprocedural MR supported by continuous left atrial pressure monitoring was associated with superior intraprocedural results translating into improved MR reduction also at the end of the hospital stay. © 2016 Wiley Periodicals, Inc.
Separation of Complex Feed Streams of a Product by Layer Melt Crystallization
Authors: Ahmad Muhammad , Ulrich Joachim 
Published: April 2016

AbstractThe purification of a complex feed stream of a multicomponent product, i.e., two isomers and impurities, by melt crystallization was evaluated by studying different optimization parameters like crystal growth rate, crystallization time, and purity. First, a phase diagram was established and on this basis different crystallization experiments were carried out. A laboratory‐scale solid layer melt crystallizer, a so‐called cold finger, was used to determine the purity and separation of the components, i.e., the ratio of the components, from the product at different crystallization times and temperatures as a function of layer thickness and a sweating process. The desired composition of the final product was achieved by adding components resulting from the second stage of crystallization since the first crystallization gave only the desired purity but not the right mixture of the two compounds of the wanted product.
Understanding the Origins of Nucleophilic Hydride Reactivity of a Sodium Hydride–Iodide Composite
Authors: Hong Zonghan , Ong Derek Yiren , Muduli Subas Kumar , Too Pei Chui , Chan Guo Hao , Tnay Ya Lin , Chiba Shunsuke , Nishiyama Yusuke , Hirao Hajime , Soo Han Sen 
Published: April 2016

AbstractSodium hydride (NaH) has been commonly used as a Brønsted base in chemical syntheses, while it has rarely been employed to add hydride (H−) to unsaturated electrophiles. We previously developed a procedure to activate NaH through the addition of a soluble iodide source and found that the new NaH–NaI composite can effect even stereoselective nucleophilic hydride reductions of nitriles, imines, and carbonyl compounds. In this work, we report that mixing NaH with NaI or LiI in tetrahydrofuran (THF) as a solvent provides a new inorganic composite, which consists of NaI interspersed with activated NaH, as revealed by powder X‐ray diffraction, and both solid‐state NMR and X‐ray photoelectron spectroscopies. DFT calculations imply that this remarkably simple inorganic composite, which is comprised of NaH and NaI, gains nucleophilic hydridic character similar to covalent hydrides, resulting in unprecedented and unique hydride donor chemical reactivity.
ChemInform Abstract: THALLIUM IN ORGANIC SYNTHESIS. 44. OXIDATIVE REARRANGEMENTS VIA OXYTHALLATION N WITH THALLIUM(III) NITRATE SUPPORTED ON CLAY
Authors: TAYLOR E. C. , CHIANG C.‐S. , MCKILLOP A. , WHITE J. F. 
Published: April 2016

AbstractAn Montmorillonit‐Ton K‐10 (Girdler Chemicals Inc.) adsorbiertes Th(NO3)3 ist ein geeignetes Reagens zur oxidierenden Umlagerung von Arylalkylketonen und Olefinen; das Reagens wird durch Eindampfen einer Suspension des Trägers in einer Tl(NO3)3°C 3 H2O‐Lösung in Methanol +Trimethylorthoformiat dargestellt.
ChemInform Abstract: THE ENE REACTION AS A ROUTE TO 3‐HYDROXYCYCLOPENTANONE DERIVATIVES. APPLICATION TO THE PROSTAGLANDINS
Authors: STORK G. , KRAUS G. 
Published: April 2016

AbstractDas Keton (I) wird durch Reaktion mit Trimethylsilylcyanid (in Gegenwart katalytischer Mengen von KCN und Dicyclohexyl‐18‐crown‐6) in das silylierte Cyanhydrin (II) übergeführt.
ChemInform Abstract: RECENT SYNTHETIC METHODS FOR POLYFLUOROAROMATIC COMPOUNDS
Authors: YAKOBSON G. G. , VLASOV V. M. 
Published: April 2016

AbstractDieser Artikel gibt eine Übersicht der Herstellungsmethoden von aromatischen Polyfluoroverbindungen mittels nuc1eophiler, elektrophiler und radikalischer Reagentien.
ChemInform Abstract: LIQUID CRYSTALS OF α‐CYANOSTILBENE TYPE
Authors: DAUGVILA YU. , TUBYALITE A. , DENIS G. , ADOMENAS P. 
Published: April 2016

AbstractVerbindungen mit großer negativer dielektrisoher Anisotropie (Ae bis ‐6) entsprechen der Formel (III).
ChemInform Abstract: FURAN DERIVATIVES. LXXIII. SOME DERIVATIVES OF 5‐ARYL‐2‐FURANCARBOXYLIC ACIDS
Authors: KRUTOSIKOVA A. , KOVAC J. 
Published: April 2016

AbstractAus den 5‐Aryl‐furylcarbonsäuren (I) werden die Säurechloride (II) dargestellt und mit NH3 in die Amide (III) übergeführt.
ChemInform Abstract: REACTION OF ARYL VINYL KETONES WITH HYDRAZINE AND ITS DERIVATIVES
Authors: VAITKEVICHYUS A. K. , DENIS G. I. , STEPONAVICHYUS YU. YU. 
Published: April 2016

AbstractDie Arylvinylketone (II) lassen sich mit Methylhydrazin zu den 1‐Methyl‐pyrazolinen (I), mit Hydrazin zu den 1‐Aroyläthyl‐pyrazolinen (III) umsetzen; primär entstehen dabei 1‐Aroyläthyl‐1‐methyl‐ bzw. 1,1‐Bis‐[aroyläthyl]‐hydrazine.
ChemInform Abstract: FLUORINE‐CONTAINING HYDROXYALKYLAMINO‐1,3,5‐TRIAZINES
Authors: KASHKIN A. V. , BAIBIKOV F. A. , PETROVA E. N. 
Published: April 2016

AbstractReaktionen der Tris‐[polyfluoralkoxy]‐triazine (I) mit äquimolaren Mengen von Mono‐ bzw. Diäthanolamin in Dimethylacetamid liefern die Hydroxyäthylamino‐Derivate (II); die Triazine (Ia) lassen sich mit einem Monoäthanolvamin‐Überschuß analog zu 2,4‐Bis‐[hydroxyäthylamino]‐ 6‐polyfluoralkoxy‐triazinen (Ausbeute 80‐89%) umsetzen.
ChemInform Abstract: ORGANOSILICON COMPOUNDS. CXLIII. HYPERCONJUGATION IN SILAACENAPHTHENES
Authors: PONEC R. , CHERNYSHEV E. A. , TOLSTIKOVA N. G. , CHVALOVSKY V. 
Published: April 2016

AbstractLadungsübertragungsspektren von 1‐Silaacenaphthen sowie 1,1‐Dimethyl‐, 1,1‐Dichlor‐ und 1,1‐Difluor‐1‐silaacenaphthen mit Tetracyanoäthylen als Elektronenakzeptor wurden in Dichlormethan gemessen.
ChemInform Abstract: REGIOSPECIFIC HOMOLYTIC DISPLACEMENT, WITH REARRANGEMENT, OF COBALOXIME(II) FROM ALLYLCOBALOXIME(III) COMPLEXES BY TRICHLOROMETHYL RADICALS
Authors: GUPTA B. D. , FUNABIKI T. , JOHNSON M. D. 
Published: April 2016

AbstractDer Allylkomplex (Ia) reagiert mit Bromotrichlormethan in Chloroform oder mit Tetrachlorkohlenstoff als Lösungsmittel und Reagenz unter quantitativer Bildung des Butens (IIIa).
ChemInform Abstract: THE PREPARATION AND STRUCTURE OF (DIVINYLCYCLOHEXENE)NICKEL‐PHOSPHINE COMPLEXES
Authors: JOLLY P. W. , KRUEGER C. , SALZ R. , WILKE G. 
Published: April 2016

AbstractZur Untersuchung der Nickel‐katalysierten Koordinierung von 1,3‐Dienen mit konjugierten Trienen wurde Butadien (I) mit dem Nickel‐Komplex (II) umgesetzt.
ChemInform Abstract: SYNTHESIS OF 3,7‐ANHYDRO‐OCTOSE DERIVATIVES RELATED TO OCTOSYL ACIDS
Authors: ANZAI K. , SAITA T. 
Published: April 2016

AbstractAusgehend von (Ia) wird das Tosylat (IIb) hergestellt, das bei der Behandlung mit Natriumhydrid das Epoxid (III) und den in Octosylsäure Azugrunde liegenden Zucker (IV) ergibt.
ChemInform Abstract: HELIUM MIGRATION IN SODIUM ALUMINOSILICATE GLASSES
Authors: SHELBY J. E. , EAGAN R. J. 
Published: April 2016

AbstractAn einer Reihe von Na‐alumosilicatgläsem wird der Einfluß des Al,O3/NaCO3‐Verhältnisses auf die Permeation, Diffusion und Löslichkeit von He untersucht.
ChemInform Abstract: DENSIFICATION OF LANTHANUM STRONTIUM CHROMIUM OXIDE (LA1‐XSRXCRO3)
Authors: GROUPP L. , ANDERSON H. U. 
Published: April 2016

AbstractIm Hinblick auf die Verwendung des Titelperowskits als Elektrode bei der magnetoplasmadynamischen Energieerzeugung werden die Sinterbedingungen (Zusammensetzung, O2‐Partialdruck, Temperatur) für die Herstellung hochdichter Proben (0‐20 Mol % Sr) ermittelt.
ChemInform Abstract: EFFECT OF CARBON AND WATER ON WETTING AND REACTIONS OF BORON OXIDE‐CONTAINING GLASSES ON PLATINUM
Authors: HOLMQUIST G. A. , PASK J. A. 
Published: April 2016

AbstractMit Hilfe der Methode der sitzenden Tropfen werden die Benetzungs‐ Charakteristiken von B203 und B,O3‐haltigen Glasschmelzen an Pt untersucht.
ChemInform Abstract: OXIDATION OF SILICON NITRIDE IN THE RANGE 1300° TO 1500°C
Authors: TRIPP W. C. , GRAHAM H. C. 
Published: April 2016

AbstractDas isotherme Oxidationsverhalten von handelsüblichem Si3N4 wird anhand von Gewichtsverlustmessungen in unterschiedlichen Atmosphären (O2, O2 /N2‐, O2 /Ar‐ und CO/COz‐Mischungen) untersucht.
ChemInform Abstract: THERMODYNAMICS OF VINYL ETHERS. XVII. THERMODYNAMIC STABILITY OF 1,2‐DIALKOXYETHYLENES
Authors: TASKINEN E. 
Published: April 2016

AbstractEs werden mit NMR‐spektroskopischen Methoden die Gleichgewichtskonstanten für die Isomerisierung der Diäther (I) und (III) zu den Isomeren (II) und (IV) untersucht.
ChemInform Abstract: VINYL CARBANIONS. 2. SIMULTANEOUS HYDROGEN‐DEUTERIUM EXCHANGE AND ADDITION OF F ETHYL (2H)ALCOHOL TO TRANS‐CINNAMONITRILE CATALYZED BY SODIUM ETHOXIDE
Authors: FEIT B. A. , PAZHENCHEVSKY R. , PAZHENCHEVSKY B. 
Published: April 2016

AbstractDie Kinetik der Addition von Äthyl(2H)alkohol an trans‐Zirntsäurenitril (I) und der durch Natriumäthylat katalysierte, simultan verlaufende Wasserstoff‐Deuterium‐ Austausch am α‐C‐Atom werden untersucht.
ChemInform Abstract: RADICAL ADDITION OF ALKYLBENZENES TO α,α‐DICHLOROVINYL COMPOUNDS
Authors: FREIDLINA R. KH. , KRUGLOVA N. V. , KHORLINA M. YA. 
Published: April 2016

AbstractToluol und p‐Xylol (I) bilden bei Zugabe von tert‐Butylperoxid mit den a,a‐Dichlorvinyl‐Verbindungen (II) die Addukte (III).
ChemInform Abstract: SELECTIVE CATALYTIC OXIDATION, XXXVII. PLATINUM CATALYSIS AS HYDRIDE MECHANISM‐ CATALYTIC OXIDATION OF NITROGEN AND OXYGEN HETEROCYCLES
Authors: HEYNS K. , BUCHHOLZ H. 
Published: April 2016

AbstractDas Verhalten N‐ und O‐haltiger Heterocyclen bei der katalytischen Oxidation in flüssiger Phase mit Pt als Katalysator und Sauerstoff als Dehydrierungsmittel wird an Modell‐ Verbindungen wie (I), (VIII), (X) und (XII) untersucht: Als Produkte werden z.B. die Verbindungen a) (IIa), (IIb), (IIIa), (IIIb), (IV), (V), (VI) (58 : 8 : 7: 10:6: 8 :3‐Gemisch) und die Säuren (VIIa) und (VIIb) (Spuren), b) (IIIa), (IXa) und (IXb) (78: 17 : 5), c) (XIa) und (XIb), d) (XIIIa) und (XIVa) (Umsatz 70‐75%) bzw. (XIIIb) und (XIVb) bzw. (XIIIc) und (XIVc), e) (XVa) bzw. (XVb) gefunden.
ChemInform Abstract: STEREOCHEMISTRY OF CYCLOPROPANE RING HYDROGENOLYSIS
Authors: KIEBOOM A. P. G. , VAN BENSCHOP H. J. , VAN BEKKUM H. 
Published: April 2016

AbstractDie Hydrogenolyse von cis‐1,2‐Dimethyl‐1,2‐diphenyl‐cyclopropan (das trans‐Isomere wurde in einer früheren Arbeit bereits untersucht) zu meso‐ und (i)‐2,4‐Diphenyl‐pentan wurde in Gegenwart von Pd‐, Pt‐, Rh‐ und Raney‐Ni‐Katalysatoren durchgeführt.
ChemInform Abstract: ESTERIFICATION OF BENZENECARBOXYLIC ACIDS WITH ETHYLENE GLYCOL. VIII. THE ACTIVITY OF METAL IONS IN CATALYTIC ESTERIFICATION OF AROMATIC CARBOXYLIC ACIDS WITH ALIPHATIC GLYCOLS
Authors: HABIB O. M. O. , MALEK J. 
Published: April 2016

AbstractWährend z.B. SnO und Ti‐tetra‐n‐butanolat wirksame Katalysatoren für die Reaktion der Säure (I) mit Glykolen wie z.B. (II) zu Mono‐ und Diestern (III) bzw. (IV) sind, zeigen z.B. Bi(OH)3 nur mittlere und MgO, Cd‐acetat, PbO und Alacetat nur geringe Wirksamkeit im Bereich von 167‐ 197°C. Die unkatalysierte Reaktion ist von 1. Ordnung, die katalysierte von der Ordnung pseudo‐l /2.
ChemInform Abstract: REACTION OF PENTAFLUOROGUANIDINE WITH FLUORONITRO‐CONTAINING ALCOHOLS
Authors: FOKIN A. V. , KOMAROV V. A. , GUKOV A. M. , UZUM A. T. 
Published: April 2016

AbstractSetzt man Pentafluorguanidin (I) unter geringem Überdruck (0,8 at) bei 20°C in Acetonitril mit 2‐Nitro‐2,2‐ difluor‐ oder 2,2‐Dinitro‐2‐fluor‐äthanol (II) in Gegenwart von Harnstoff um, so erhält man nach 15 ‐ 20 Stdn. über die nicht isolierte Zwischenverbindung (III), durch anschließendes Fluorieren Tris‐difluoramino‐methyl‐2,2‐dinitro‐2‐fluor‐ bzw. ‐2‐nitro‐2,2‐difluoräthyl‐äther (IV) als hochsiedendes farbloses Öl. Entsprechend entstehen nur mit längerer Reaktionsdauer (40 ‐ 50 Stdn.) die Äther (V) und (VI).
ChemInform Abstract: THE PHOTOADDITION OF ALDEHYDES TO ENONES‐ A DIRECT ROUTE TO 1,4‐DIKETONES
Authors: HICKS D. R. , ANDERSON R. C. , FRASER‐REID B. 
Published: April 2016

AbstractDurch Belichtung (Ä = 350 mm) von Enonen und Aldehyden in Acetonitril und in Gegenwart von Benzophenon lassen sich die 1,4‐Diketone (III), (VII), (IX) und (XI) darstellen.
ChemInform Abstract: A USEFUL PREPARATION OF 4‐SUBSTITUTED 5‐HYDROXY‐3‐OXOCYCLOPENTENE
Authors: PIANCATELLI G. , SCETTRI A. , BARBADORO S. 
Published: April 2016

AbstractFurfural (I) reagiert mit den Grignardverbindungen (II) zu den Carbinolen (III), die sauer zu den Cyclopentenonen (IV) führen.
ChemInform Abstract: A FACILE AND STEREOSELECTIVE APPROACH TO GEMINAL ENDO‐IODO‐EXO‐BROMOCYCLOPROPANES, APPLICATION IN THE SYNTHESIS OF MEDIUM‐SIZED RINGS
Authors: LOOZEN H. J. J. , ROBBEN W. M. M. , BUCK H. M. 
Published: April 2016

AbstractLithiierung der Dibromcyclopropan‐Verbindungen (I) und nachfolgende Umsetzung mit Jod führen ausschließlich zu den endo‐Jod‐exo‐brom‐Derivaten (II).
ChemInform Abstract: FLUORINE‐CONTAINING HETEROCUMULENES. COMMUNICATION 14. CYCLOADDITION OF PERFLUOROISOBUTYLENE TO BIS(TRIFLUOROMETHYL)KETENIMINES DURING NUCLEOPHILIC CATALYSIS
Authors: ZEIFMAN YU. V. , TER‐GABRIELYAN E. G. , SIMONYAN L. A. , GAMBARYAN N. P. , KNUNYANTS I. L. 
Published: April 2016

AbstractBei der Einwirkung von Perfluor‐isobutylen (II) in Gegenwart von Cäsiumfluorid auf die Iminoylfluoride (I) tritt zunächst eine Dehydrofluorierung zu den Bis‐tri= fluormethyl‐ketenirninen (III) ein, die unter Anlagerung eines weiteren Mol (II) die Azetidine (IV) ergeben.
ChemInform Abstract: SYNTHESIS OF N‐CARBOMETHOXYMETHANOCARBAZOLE
Authors: ASHMORE J. W. , RADLICK P. C. , HELMKAMP G. K. 
Published: April 2016

AbstractCarbazol wird in einer modi?= zierten Birch‐Reduktion hauptsächlich zur Dihydroverbindung (II) reduziert, die nach Carbomethoxylierung zu (IV) in das Cyclopropanderivat (V) übergeführt wird.