bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chemical Functionalisation and Photoluminescence of Graphene Quantum Dots
Authors: Sekiya Ryo , Uemura Yuichiro , Naito Hiroyoshi , Naka Kensuke , Haino Takeharu 
Published: April 2016

AbstractChemical modification of graphene quantum dots (GQDs) can influence their physical and chemical properties; hence, the investigation of the effect of organic functional groups on GQDs is of importance for developing GQD–organic hybrid materials. Three peripherally functionalised GQDs having a third‐generation dendritic wedge (GQD‐2), long alkyl chains (GQD‐3) and a polyhedral oligomeric silsesquioxane group (GQD‐4) were prepared by the CuI‐catalysed Huisgen cycloaddition reaction of GQD‐1 with organic azides. Cyclic voltammetry indicated that reduction occurred on the surfaces of GQD‐1–4 and on the five‐membered imide rings at the periphery, and this suggested that the functional groups distort the periphery by steric interactions between neighbouring functional groups. The HOMO–LUMO bandgaps of GQD‐1–4 were estimated to be approximately 2 eV, and their low‐lying LUMO levels (<−3.9 eV) were lower than that of phenyl‐C61‐butyric acid methyl ester, an n‐type organic semiconductor. The solubility of GQD‐1–4 in organic solvents depends on the functional groups present. The functional groups likely cover the surfaces and periphery of the GQDs, and thus increase their affinity for solvent and avoid precipitation. Similar to GQD‐2, both GQD‐3 and GQD‐4 emitted white light upon excitation at 360 nm. Size‐exclusion chromatography demonstrated that white‐light emission originates from the coexistence of differently sized GQDs that have different photoluminescence emission wavelengths.
Tuning the Protein‐Induced Absorption Shifts of Retinal in Engineered Rhodopsin Mimics
Authors: Suomivuori Carl‐Mikael , Lang Lucas , Sundholm Dage , Gamiz‐Hernandez Ana P. , Kaila Ville R. I. 
Published: April 2016

AbstractRational design of light‐capturing properties requires understanding the molecular and electronic structure of chromophores in their native chemical or biological environment. We employ here large‐scale quantum chemical calculations to study the light‐capturing properties of retinal in recently designed human cellular retinol binding protein II (hCRBPII) variants (Wang et al. Science, 2012, 338, 1340–1343). Our calculations show that these proteins absorb across a large part of the visible spectrum by combined polarization and electrostatic effects. These effects stabilize the ground or excited state energy levels of the retinal by perturbing the Schiff‐base or β‐ionone moieties of the chromophore, which in turn modulates the amount of charge transfer within the molecule. Based on the predicted tuning principles, we design putative in silico mutations that further shift the absorption properties of retinal in hCRBPII towards the ultraviolet and infrared regions of the spectrum.
Control over the Self‐Assembly Modes of PtII Complexes by Alkyl Chain Variation: From Slipped to Parallel π‐Stacks
Authors: Allampally Naveen Kumar , Mayoral María José , Chansai Sarayute , Lagunas María Cristina , Hardacre Christopher , Stepanenko Vladimir , Albuquerque Rodrigo Q. , Fernández Gustavo 
Published: April 2016

AbstractWe report the self‐assembly of a new family of hydrophobic, bis(pyridyl) PtII complexes featuring an extended oligophenyleneethynylene‐derived π‐surface appended with six long (dodecyloxy (2)) or short (methoxy (3)) side groups. Complex 2, containing dodecyloxy chains, forms fibrous assemblies with a slipped arrangement of the monomer units (dPt⋅⋅⋅Pt≈14 Å) in both nonpolar solvents and the solid state. Dispersion‐corrected PM6 calculations suggest that this organization is driven by cooperative π–π, C−H⋅⋅⋅Cl and π–Pt interactions, which is supported by EXAFS and 2D NMR spectroscopic analysis. In contrast, nearly parallel π‐stacks (dPt⋅⋅⋅Pt≈4.4 Å) stabilized by multiple π–π and C−H⋅⋅⋅Cl contacts are obtained in the crystalline state for 3 lacking long side chains, as shown by X‐ray analysis and PM6 calculations. Our results reveal not only the key role of alkyl chain length in controlling self‐assembly modes but also show the relevance of Pt‐bound chlorine ligands as new supramolecular synthons.
Weak Intermolecular Hydrogen Bonds with Fluorine: Detection and Implications for Enzymatic/Chemical Reactions, Chemical Properties, and Ligand/Protein Fluorine NMR Screening
Authors: Dalvit Claudio , Vulpetti Anna 
Published: April 2016

AbstractIt is known that strong hydrogen‐bonding interactions play an important role in many chemical and biological systems. However, weak or very weak hydrogen bonds, which are often difficult to detect and characterize, may also be relevant in many recognition and reaction processes. Fluorine serving as a hydrogen‐bond acceptor has been the subject of many controversial discussions and there are different opinions about it. It now appears that there is compelling experimental evidence for the involvement of fluorine in weak intramolecular or intermolecular hydrogen bonds. Using established NMR methods, we have previously characterized and measured the strengths of intermolecular hydrogen‐bond complexes involving the fluorine moieties CH2F, CHF2, and CF3, and have compared them with the well‐known hydrogen‐bond complex formed between acetophenone and the strong hydrogen‐bond donor p‐fluorophenol. We now report evidence for the formation of hydrogen bonds involving fluorine with significantly weaker donors, namely 5‐fluoroindole and water. A simple NMR method is proposed for the simultaneous measurement of the strengths of hydrogen bonds between an acceptor and a donor or water. Important implications of these results for enzymatic/chemical reactions involving fluorine, for chemical and physical properties, and for ligand/protein 19F NMR screening are analyzed through experiments and theoretical simulations.
Pyrene‐Bridged Boron Subphthalocyanine Dimers: Combination of Planar and Bowl‐Shaped π‐Conjugated Systems for Creating Uniquely Curved π‐Conjugated Systems
Authors: Nakano Shota , Kage Yuto , Furuta Hiroyuki , Kobayashi Nagao , Shimizu Soji 
Published: April 2016

AbstractPyrene‐bridged boron subphthalocyanine dimers were synthesized from a mixed‐condensation reaction of 2,7‐di‐tert‐butyl‐4,5,9,10‐tetracyanopyrene and tetrafluorophthalonitrile, and their syn and anti isomers arising from the result of connecting two bowl‐shaped boron subphthalocyanine molecules were successfully separated. Expansion of the conjugated system of boron subphthalocyanine through a pyrene bridge caused a redshift of the Q band absorption relative to the parent pyrene‐fused monomer, whereas combining the curved π‐conjugation of boron subphthalocyanine with the planar π‐conjugation of pyrene enabled facile embracement of C60 molecules, owing to the enhanced concave–convex π–π stacking interactions.
Efficient Preparation of TMSCCl2Br and Its Use in Dichlorocyclopropanation of Electron‐Deficient Alkenes
Authors: Lee Darren S. , Durán‐Peña María Jesús , Burroughs Laurence , Woodward Simon 
Published: April 2016

AbstractThe reaction of excess TMSCl and LiCCl2Br at low temperature is a technically simple high yield route to TMSCCl2Br. The latter is a stable source of the dichlorobromomethide carbanion, which undergoes 1,4‐addition with cyclic nitroalkenes and (E)‐fumarates leading to dichlorocyclopropanes after bromide expulsion. For nitrostyrenes the reaction arrests at the 1,4‐addition product. Low temperature NMR spectroscopy studies and DFT calculations suggest the formation of an “ate” species [(nitronate)SiFMe3]− which, upon boil‐off of TMSF at 10–20 °C, yields the cyclopropane. DFT calculations also support the experimental differences between fluoride and acetate as promotors.
Ion‐Pairing Assemblies Based on Pentacyano‐Substituted Cyclopentadienide as a π‐Electronic Anion
Authors: Bando Yuya , Haketa Yohei , Sakurai Tsuneaki , Matsuda Wakana , Seki Shu , Takaya Hikaru , Maeda Hiromitsu 
Published: April 2016

AbstractPentacyanocyclopentadienide (PCCp−), a stable π‐electronic anion, provided various ion‐pairing assemblies in combination with various cations. PCCp−‐based assemblies exist as single crystals and mesophases owing to interionic interactions with π‐electronic and aliphatic cations with a variety of geometries, substituents, and electronic structures. Single‐crystal X‐ray analysis revealed that PCCp− formed cation‐dependent arrangements with contributions from charge‐by‐charge and charge‐segregated assembly modes for ion pairs with π‐electronic and aliphatic cations, respectively. Furthermore, some aliphatic cations gave dimension‐controlled organized structures with PCCp−, as observed in the mesophases, for which synchrotron XRD analysis suggested the formation of charge‐segregated modes. Noncontact evaluation of conductivity for (C12H25)3MeN+⋅PCCp− films revealed potential hole‐transporting properties, yielding a local‐scale hole mobility of 0.4 cm2 V−1 s−1 at semiconductor–insulator interfaces.
Ionic Polymer Microspheres Bearing a CoIII–Salen Moiety as a Bifunctional Heterogeneous Catalyst for the Efficient Cycloaddition of CO2 and Epoxides
Authors: Leng Yan , Lu Dan , Zhang Chenjun , Jiang Pingping , Zhang Weijie , Wang Jun 
Published: April 2016

AbstractWe report a unique strategy to obtain the bifunctional heterogeneous catalyst TBB‐Bpy@Salen‐Co (TBB=1,2,4,5‐tetrakis(bromomethyl)benzene, Bpy=4,4’‐bipyridine, Salen‐Co=N,N’‐bis({4‐dimethylamino}salicylidene)ethylenediamino cobalt(III) acetate) by combining a cross‐linked ionic polymer with a CoIII–salen Schiff base. The catalyst showed extra high activity for CO2 fixation under mild, solvent‐free reaction conditions with no requirement for a co‐catalyst. The synthesized catalyst possessed distinctive spherical structural features, abundant halogen Br− anions with good leaving group ability, and accessible Lewis acidic Co metal centers. These unique features, together with the synergistic role of the Co and Br− functional sites, allowed TBB‐Bpy@Salen‐Co to exhibit enhanced catalytic conversion of CO2 into cyclic carbonates relative to the corresponding monofunctional analogues. This catalyst can be easily recovered and recycled five times without significant leaching of Co or loss of activity. Moreover, based on our experimental results and previous work, a synergistic cycloaddition reaction mechanism was proposed.
Anisotropic Dissociation of π–π Stacking and Flipping‐Motion‐Induced Crystal Jumping in Alkylacridones and Their Dicyanomethylene Derivatives
Authors: Takeda Takashi , Akutagawa Tomoyuki 
Published: April 2016

AbstractEthylacridone (1 b) and dicyanomethylenated acridones 2 a,b,d showed crystal‐jumping activity upon heating. This is the first example of thermosalient behavior in a simple aromatic ketone and its derivatives. A systematic investigation of the jumping behavior of derivatives with different alkyl chains by variable‐temperature X‐ray crystal‐structure analyses revealed the mechanism of this phenomenon. Anisotropic dissociation of π stacking in a dimer was important for inducing crystal jumping in 1 b, whereas the collective fluctuation/flipping motion of a dicyanomethylene unit induced crystal jumping in 2.
Efficient Synthesis of Dimeric Oxazoles, Piperidines and Tetrahydroisoquinolines from N‐Substituted 2‐Oxazolones
Authors: He Yun , Agarwal Piyush K. , Kiran I. N. Chaithanya , Yu Ruocheng , Cao Bei , Zou Cheng , Zhou Xinghua , Xu Huacheng , Xu Biao , Zhu Lei , Lan Yu , Nicolaou K. C. 
Published: April 2016

AbstractA mild and practical method for the construction of heterocycles from N‐substituted 2‐oxazolones through cascade, BF3⋅Et2O/H2O‐catalyzed reactions involving iminium ion generation and trapping by external or internal olefinic and aryl moieties is described. Mechanistic and computational studies revealed the strong protic acid HBF4 as the initiating catalyst for these cascade reactions. Providing access to novel molecular diversity, these processes may facilitate chemical biology studies, drug discovery efforts and natural products synthesis.
Synthesis of (E)‐4‐Bromo‐3‐methoxybut‐3‐en‐2‐one, the Key Fragment in the Polyhydroxylated Chain Common to Oscillariolide and Phormidolides A–C
Authors: Gil Alejandro , Lamariano‐Merketegi Janire , Lorente Adriana , Albericio Fernando , Álvarez Mercedes 
Published: April 2016

AbstractInvited for the cover of this issue is the group of Mercedes Álvarez at the University of Barcelona. The image depicts the Álvarez group′s effort to successfully “fish” an efficient strategy for the synthesis of the bromomethoxydiene (BMD) moiety present in marine natural products such as phormidolides and oscillariolides. Read the full text of the article at 10.1002/chem.201600770.
ChemInform Abstract: THE MIXTURE NICKEL‐ZINC‐GERMANIUM (NIZNMGEM′)
Authors: SARAH N. , RAJASEKHARAN T. , SCHUBERT K. 
Published: April 2016

AbstractZulegieren von Ge führt zu einer Ausweitung des Stabilitätsbereichs von NiZn.h(CsCl‐Typ) in Richtung tieferer Temp., da das Ge Valenzelektronen liefert, die sonst durch erhöhte Temp. aus den Ni‐Atomen angeregt werden müssen.
ChemInform Abstract: EQUILIBRIUM MEASUREMENTS WITH THE SYSTEMS PDX2(L) + AL2X6(G) = PDAL2X8(G); (X = CL, BR, I)
Authors: MERKER H.‐B. , SCHAEFER H. + 
Published: April 2016

Abstractmit Hilfe einer einfachen Mitführungsanordnung führen für X: I im Gegensatz zu den mit X: Br und Cl gewonnenen Daten zu weniger genauen, orientierenden Werten.
ChemInform Abstract: PHASE EQUILIBRIUMS AND THERMODYNAMIC PROPERTIES OF THE LITHIUM‐NITROGEN‐CHLORINE, LITHIUM‐NITROGEN‐BROMINE AND LITHIUM‐NITROGEN‐IODINE SYSTEMS
Authors: HARTWIG P. , RABENAU A. , WEPPNER W. 
Published: April 2016

AbstractIm Hinblick auf mögliche Anwen ungen von Verbindungen in den Titelsystemen als reine Ionenleiter werden die Zus andsdiagramme der quasi‐binären Systeme Li3N‐LiX (X:Cl, Br, I) sowie die Gibbss en Phasendreiecke der ternären Systeme Li‐N‐Xmitgeteilt.
ChemInform Abstract: THE PRESSURE OF IRIDIUM OXIDES OVER IRIDIUM AT HIGH TEMPERATURES IN 1 ATM OF DRY OXYGEN
Authors: CHANDRASEKHARAIAH M. S. , KARKHANAVALA M. D. , TRIPATHI,S. N. TRIPATHI,S. N. 
Published: April 2016

AbstractWie Untersuchungen der Verdampfung von Ir in trockenem O2 bei 1 at zwischen 1435 und 1628 K mit Hilfe der Transpirationsmethode zeigen, wird der Ir‐Transport oberhalb 1500 K durch die heterogenen Reaktionen A und B bestimmt.
ChemInform Abstract: STUDIES ON THE OXIDATION OF IRON(II) ION DURING THE FORMATION OF FE3O4 AND α‐FEO(OH) BY AIR OXIDATION OF FE(OH)2 SUSPENSIONS
Authors: TAMAURA Y. , BUDUAN P. V. , KATSURA T. 
Published: April 2016

AbstractDie Lufto idation von Fe(OH)2‐Suspensionen bei pH ll und 65°C läuft bei geringer SOäTKo entration (0.03 mol dm ′3) in 3 Stufen ab: 1. Bildung von Fe(III)‐oxiden und langsa ere Bildung von Fe3O4, 2. schnelle Bildung von Fe3O4 und 3. lineare Bildung von F 304. Bei hoher SOEf‐Konzentration (0.6 mol dm") erfolgt neben der Bildung von α‐ eO(OH) langsame Bildung von amorphem γ‐FeO(OH).
ChemInform Abstract: KINETICS OF THE OXIDATION OF HYDROGEN PEROXIDE BY BIS(2,2′‐BIPYRIDINE)SILVER(II) IONS
Authors: HEYWARD M. P. , WELLS C. F. 
Published: April 2016

AbstractDie Stöchiometrie der Reaktion zwischen H2O2 und [Ag(bipy)2]2 (bipy: 2,2′‐Bipyridin) entspricht der in Reaktion A. Als reaktive Ag(II)‐Hauptspezies wird das mit [Ag(bipy)2]" im Gleichgewicht stehende [Ag(bipy)]" ermittelt.
ChemInform Abstract: CONFORMATIONAL STUDIES OF DIHYDROTETRAPHENYLMETHANES. I. X‐RAY CRYSTALLOGRAPHIC AND SOLUTION HYDROGEN‐1 NMR STUDIES OF TRANS‐1,4‐DIHYDRO‐4‐TRITYLBIPHENYL AND ITS 4′‐BROMO DERIVATIVES: BOAT‐BOAT INVERSION IN A CONGESTED CYCLOHEXA‐1,4‐DIENE
Authors: CHEETHAM A. K. , GROSSEL M. C. , NEWSAM J. M. 
Published: April 2016

AbstractIm Gegensatz zum Bromderivat der Titelverbindung, das in zwei kristallinen Modifikationen auftritt, RG: Pnam, Z=4 bzw. RG: Pc, Z=2, bildet die bromfreie Titelverbindung nur orthorhombische Kristalle (RG: Pnam, Z=4) (niedrige A. K.; GROSSEL, M. C.; NEWSAM, J. M.; J. Am.
ChemInform Abstract: STEREOCHEMISTRY OF BICYCLO(3.1.0)HEXANE DERIVATIVES. PART XII. OPTICALLY ACTIVE 6,6‐DIMETHYLBICYCLO(3.1.0)HEXAN‐2‐OLS
Authors: WALKOWICZ M. , LOCHYNSKI S. , WALKOWICZ C. 
Published: April 2016

AbstractAus (+)‐3‐Caren (I) wird über den Aldehyd (II) unter Erhaltung der Konfiguration an den Brückenkopf‐C‐Atomen das Bicyclohexen (III) dargestellt, dessen Hydrierung zu einem Gemisch (96 :4) der Cyclohexane (IVa) und (IVb) führt.
ChemInform Abstract: NUCLEAR MAGNETIC RESONANCE DETERMINATION OF ENANTIOMERIC COMPOSITION AND ABSOLUTE CONFIGURATION OF AMINES, ALCOHOLS, AND THIOLS WITH α‐(1‐(9‐ANTHRYL)‐2,2,2‐TRIFLUOROETHOXY)ACETIC ACID AS A CHIRAL DERIVATIZING AGENT
Authors: PIRKLE W. H. , SIMMONS K. A. 
Published: April 2016

AbstractAus dem Alkohol (I) wird auf dem angegebenen Weg die Carbonsäure (II) hergestellt; analog werden aus den Enantiomeren von (I) die Enantiomeren von (II) erhalten.
ChemInform Abstract: PROTON‐TRANSFER REACTIONS. I. PARTITIONING OF CARBANION INTERMEDIATES GENERATED BY REACTIONS OF ALKENES WITH ALKOXIDE IONS IN ALCOHOL
Authors: KOCH H. F. , KOCH J. G. , DONOVAN D. B. , TOCZKO A. G. , KIELBANIA A. J. JUN. 
Published: April 2016

AbstractNucleophile Reaktionen der Alkene (I) mit Na‐ethanolat/Ethanol führt zu Ethergemischen, die in den Fällen a und b vorwiegend die Vinylether (II) neben den gesättigten Ethem (III) enthalten, im Fall c jedoch nahezu quantitativ aus dem Allylether (IV) bestehen.
ChemInform Abstract: GLYCOL‐CLEAVAGE REAGENTS ALSO ACT ON STANNYLENE DERIVATIVES
Authors: DAVID S. , THIEFFRY A. 
Published: April 2016

AbstractAus dem Phosphoniumsalz (I) erhält man nach Wittig mit dem Aldehyd (II) das Olefin (III) das mit N‐Methyl‐morpholin‐N‐oxid und Osmiumtetroxid zu (IV) hydroxyliert werden kann.
ChemInform Abstract: OXYGENATION OF 3‐HYDROXYFLAVONES BY SUPEROXIDE ANION
Authors: EL‐SUKKARY M. M. A. , SPEIER G. 
Published: April 2016

AbstractDie 3‐Hydroxy‐flavone (I) reagieren mit Kaliumsuperoxid in Gegenwart von [18]Krone‐6 unter Ringspaltung zu den Ketocarbonsäuren (II); ein Zusatz von Kupfer(II)‐acetylacetonat erhöht dabei die Reaktionsgeschwindigkeit.
ChemInform Abstract: PHOTOREARRANGEMENT OF 5,6‐DICHLORO‐1,4‐DIHYDRO‐1,4‐DIMETHYLPYRAZINE‐2,3‐DIONE AND ITS FURTHER REACTIONS
Authors: WAMHOFF H. , KLEIMANN W. 
Published: April 2016

AbstractDas in mäßiger Ausbeute aus der Verbindung (I) zugängliche Dichlorid (II) ergibt bei der Photolyse unter Umlagerung das Imidazolidindion (III), das beim Erwärmen wieder in (II) übergeht.
ChemInform Abstract: A POLYMER‐SUPPORTED DICHLORO(CYCLOPENTADIENYL)RHODIUM(III) CATALYST
Authors: TUNG H.‐S. , BRUBAKER C. H. JUN. 
Published: April 2016

AbstractIn einer langsamen Reaktion entsteht aus dem an ein Polystyrolharz gebundenen Phenylcyclopentadien (I) mit Rhodiumtrichlorid der Katalysator (III).
ChemInform Abstract: SYNTHESIS OF ELECTROPHILIC ALLYL DICHLORIDES
Authors: COURTHEYN D. , VERHE R. , DE KIMPE N. , DE BUYCK L. , SCHAMP N. 
Published: April 2016

AbstractAus den Dichloraldehyden (I) entstehen mit den Phosphonsäureestern (II) in Gegenwart von NaH die Olefine (III), analog erhält man aus den 1,3‐Diketonen (IV) mit (I) unter Eliminierung eines Acylrestes die ungesättigten Ketone (Va) oder (Vb) in unterschiedlichen Anteilen je nach Art der Substituenten.
ChemInform Abstract: STEREOSPECIFIC SYNTHESIS OF 2‐BUTENYL KETONES AND OF 2‐BUTENESULFONIC ACID
Authors: GRIGNON‐DUBOIS M. , DUNOGUES J. , CALAS R. 
Published: April 2016

AbstractDie isomeren 1‐Methyl‐2‐trimethylsilyl‐cyclopropane (I) reagieren mit Säurechloriden (II) unter Friedel‐Crafts‐Bedingungen zu den ungesättigten Ketonen (III) unter weitgehendem Erhalt der Stereochemie von (I).
ChemInform Abstract: STEREOCHEMISTRY OF IMINO GROUP REDUCTION. 2. SYNTHESIS AND ASSIGNMENT OF CONFIGURATION OF SOME N‐(1‐PHENYLETHYL)‐1,2‐DIARYL‐2‐AMINOETHANOLS
Authors: ALCAIDE B. , DE LA PRADILLA R. F. , LOPEZ‐MARDOMINGO C. , PEREZ‐OSSORIO R. , PLUMET J. 
Published: April 2016

AbstractLithiumalanat reduziert die Acylimine (I) zu den Aminoalkoholen (II), die auch aus (I) über die Keto‐amine (III) erhalten werden können.
ChemInform Abstract: PYRIDINIUM CHLOROCHROMATE RELEASES QUINONES FROM HYDROQUINONE SILYL ETHERS
Authors: WILLIS J. P. , GOGINS K. A. Z. , MILLER L. L. 
Published: April 2016

AbstractHydrochinon‐bis‐silylether (I) werden durch Pyridiniumchlorchromat (PCC) in hohen Ausbeuten zu den entsprechenden Chinonen gespalten und oxidiert.
ChemInform Abstract: 1,3,5‐TRISUBSTITUTED BENZENES. I. SYNTHESIS AND REACTIONS OF 3,5‐DIBROMOPHENYLLITHIUM
Authors: CHEN L. S. , CHEN G. J. , TAMBORSKI C. 
Published: April 2016

Abstract1,3,5‐Tribromobenzol (I) reagiert mit n‐Butyllithium (II) bei tiefen Temperaturen zu 3,5‐Dibromophenyllithium (III), dessen Hydrolyseprodukt (IV) in hoher Ausbeute isoliert wird.
ChemInform Abstract: POTENTIAL ANTITHYROID AGENTS. III: N‐ARYLFORMAMIDINO‐N‐ARYLTHIOCARBAMIDES
Authors: UPADHYAYA J. S. , SRIVASTAVA P. K. 
Published: April 2016

AbstractDie substituierten Formamidinothioharnstoffe (IV), die nach dem angegebenen Schema hergestellt werden, weisen antithyroide Aktivität auf.
ChemInform Abstract: REACTIONS OF 1‐HALO‐3‐METHYL‐2,3‐EPOXYBUTANE WITH ALCOHOLS
Authors: GEVORKYAN A. A. , KAZARYAN P. I. , AVAKYAN S. V. , PANOSYAN G. A. 
Published: April 2016

AbstractDie Halogenmethylepoxide (I) reagieren in Gegenwart von Natriumalkoholat mit Alkoholen (II) zu den Epoxid‐ethern (III).
ChemInform Abstract: FACILE SYNTHESIS OF 4‐ALKYLIDENEBUT‐2‐ENOLIDES BY DOUBLE DEHYDROCHLORINATION OF 2,2‐DICHLORO‐4‐ALKYLBUTANOLIDES
Authors: NAKANO T. , NAGAI Y. 
Published: April 2016

AbstractDie Olefine (I) reagieren mit (II) zu den Dichlorlactonen (III), deren Dehydrochlorierung zu den Alkylidenbutenoliden (IV) führt.
ChemInform Abstract: STEREOSPECIFIC INTRAMOLECULAR ADDITION OF α‐LITHIO SULFOXIDES OR SULFONES TO INACTIVATED DOUBLE BONDS
Authors: CERE V. , PAOLUCCI C. , POLLICINO S. , SANDRI E. , FAVA A. 
Published: April 2016

AbstractIn einer trans‐annularen Addition entsteht aus dem Sulfoxid (I) das bicyclische Sulfoxid (II), das zur Verbindung (III) isomerisiert wird.
ChemInform Abstract: REACTION OF OLIVANIC ACIDS WITH HYPOBROMOUS ACID: THE PREPARATION AND USE OF A VERSATILE INTERMEDIATE, THE C‐3 THIOL
Authors: CORBETT D. F. 
Published: April 2016

AbstractDie Thioether (I) werden mit unterbromiger Säure zu den Mercaptoverbindungen (III) gespalten, die ohne Isolierung mit Propiolsäureethylester (IV) die Addukte (V) ergeben; als Nebenprodukt entsteht dabei aus (IIIb) der Heterocyclus (VI).
ChemInform Abstract: SYNTHESIS OF SOME NEW 3,5‐DIMETHYL‐4‐PHENYLAZO‐N′‐THIOCARBAMOYLPYRAZOLES
Authors: JAIN R. , TYAGI S. , AGRAWAL S. 
Published: April 2016

AbstractDie Reaktion von Pentantrion‐3‐hydrazon (I) mit verschiedenen Semicarbaziden (II) liefert die Pyrazole (III), die auf hypoglykämische Aktivität untersucht werden sollen.
ChemInform Abstract: CHALCONE OXIMES. PART V. REACTION OF HYDROXYLAMINE WITH 4‐SUBSTITUTED 2′‐HYDROXYCHALCONES
Authors: WITCZAK Z. , KROLIKOWSKA M. 
Published: April 2016

AbstractDie Chalkone (Ia) reagieren mit Hydroxylamin in Pyridin enthaltender Lösung unter Bildung der Oxime (II)‐(IV), wobei sich das Produktverhältnis in dem ‐Me) und Hydroxylamin ausschließlich das Flavonoxim (IV) (Z = ‐Me; Ausb. 86%), aus (Ic) dagegen (IIc) (44%) und aus (Ib) das Isoxazolin (V), während (VII) nicht analog aus (Ic), sondern über das Oxim (VI) dargestellt wird.
ChemInform Abstract: STRUCTURE OF NEPETALIC ACID IN THE SOLID STATE AND IN SOLUTION BY X‐RAY DIFFRACTION AND NUCLEAR MAGNETIC RESONANCE ANALYSIS
Authors: EISENBRAUN E. J. , BROWNE C. E. , ELIEL E. L. , HARRIS D. L. , RAHMAN A. , VAN DER HELM D. 
Published: April 2016

AbstractDie Struktur von Nepetalinsäure ( I) im festen Zustand wird über Röntgen‐Spektren ermittelt.
ChemInform Abstract: STUDIES IN THE SYNTHESIS OF FUROCHROMONES. PART VI
Authors: PATOLIA R. J. , SANGHVI K. P. , TRIVEDI K. N. 
Published: April 2016

AbstractDas Tetrahydroxanthon (I) liefert nach Acetylierung und Bromierung der Allylgruppe das Dibrompropylxanthon (II), das unter basischen Bedingungen zum Furoxanthon (III) cyclisiert wird.