bluuebunny/crossref_metadata_2025 huggingface dataset:
Finite‐time Stability on a Class of Non‐autonomous SICNNs with Multi‐proportional Delays
Authors: Yu Yuehua
Published: May 2016

This paper is concerned with the problem of finite‐time stability for a class of non‐autonomous shunting inhibitory cellular neural networks with multi‐proportional delays. An explicit criterion for the finite‐time stability of the system has been proposed by employing the differential inequality techniques. Moreover, an illustrative example and its numerical simulations are given to demonstrate the effectiveness of the obtained result.
Principal component models with stochastic mean‐reverting levels. Pricing and covariance surface improvements
Authors: Bi Monika , Escobar Marcos , Goetz Barbara , Zagst Rudi
Published: May 2016

In this work, we create a family of simple stochastic covariance models, which display stochastic mean‐reverting levels of covariance as an additional level of stochastic behavior beyond well‐known stochastic volatility and correlation. The one‐dimensional version of our model is inspired by Heston model, while the multidimensional model generalizes the principal component stochastic volatility model. Their main contribution is that they capture stochastic mean‐reversion levels on the volatility and on the eigenvalues of the instantaneous covariance matrix of the vector of stock prices, with direct implications on the correlations as well. Our focus is on the multidimensional model; we investigate its properties and derive a closed‐form expression for the characteristic function. This allows us to study the pricing of financial derivatives, such as correlation and spread options. Those prices are compared with simulated Monte Carlo prices for correctness. A sensitivity analysis is performed on the parameters of the stochastic mean‐reverting level of volatilities to study their impact on the price. Finally, implied volatility curves and correlation surfaces are built to reveal the additional flexibility gained within the new model. Copyright © 2016 John Wiley & Sons, Ltd.
ChemInform Abstract: Crystallization of Fine, Chemically Prepared Lead Lanthanum Zirconate Titanate (PLZT) Powders at Low Temperature.
Authors: YOSHIKAWA Y. , TSUZUKI K.
Published: May 2016

The PLZT powder precipitated from an aqueous solution of the corresponding nitrates (addn.
ChemInform Abstract: Structure of Calcium Fluoroborate, Ca5(BO3)3F.
Authors: LEI S. , HUANG Q. , ZHENG Y. , JIANG A. , CHEN C.
Published: May 2016

A search for new nonlinear optical (NLO) crystals among the anhydrous borates leads to the preparation of the new NLO crystal Ca5(BO3)3F (flux method using CaCO3, H3BO3, and CaF2).
ChemInform Abstract: Luminescent Centers of Td Symmetry in “Cold” Activated ZnS‐Mn.
Authors: KYNEV K. , MANEVA N. , ANGELOV S.
Published: May 2016

A yellow emitting phosphor with band maximum at 590‐595 nm is prepared by coprecipitation of ZnS and MnS using an excess of Na2S. The ESR spectrum of this phosphor shows the well known sextett characteristic for Mn2+ ions in tetrahedral environment (i.e.
ChemInform Abstract: Effects of Annealing Conditions of Electrodes on the Photovoltaic Properties of Sintered Cadmium Sulfide/Cadmium Telluride Solar Cells.
Authors: KIM C. S. , IM H. B.
Published: May 2016

Polycrystalline n‐CdS/p‐CdTe solar cells are fabricated using a commercial carbon paint as ohmic contact for the CdTe layer and a silver paint mixed with 20% In powder as contact for CdS.
ChemInform Abstract: Reduction of Dioxygen at Polypyrrole‐Modified Electrodes with Incorporated Pt Particles.
Authors: VORK F. T. A. , BARENDRECHT E.
Published: May 2016

Electrodes, which are electrocatalytically active for the reduction of O2 to H2O or H2O2 in aqueous media, are prepared by electrodeposition of Pt particles in a polypyrrole layer.
ChemInform Abstract: The Reaction Between Arenediazonium Tetrafluoroborates and Alkaline Thiocarboxylates in DMSO: A Convenient Access to Aryl Thiolesters and Other Aromatic Sulfur Derivatives.
Authors: PETRILLO G. , NOVI M. , GARBARINO G. , FILIBERTI M.
Published: May 2016

The title reaction in DMSO leads to aryl thiolesters of type (III) which can either be isolated, or hydrolyzed to give thiols such as (VI).
ChemInform Abstract: Boat/Chair Topographic Stereoselection During Anionic Oxy‐Cope Rearrangement of 1‐Alkenyl‐2‐cyclopentenyl‐endo‐norbornan‐2‐ols.
Authors: PAQUETTE L. A. , TELEHA C. A. , TAYLOR R. T. , MAYNARD G. D. , ROGERS R. D. , GALLUCCI J. C. , SPRINGER J. P.
Published: May 2016

The title compounds (III), (V), (VII), and (X) are synthesized by similar methods from readily available functionalized norbornanones, e.g. (I), as exemplified for (III).
ChemInform Abstract: Photochemical Oxidation of Organic Substrates by trans‐Dioxoruthenium(VI) and Osmium(VI) Complexes.
Authors: YAM V. W.‐W. , CHE C.‐M.
Published: May 2016

The alkenes (I) are oxidized upon irradiation in the presence of the complexes (II) or (IV) mentioned in the title to give the epoxides (III).
ChemInform Abstract: Concave Reagents. Part 4. Protonation of Nitronate Anions via Concave Pyridines. Stereoselective C‐Protonation versus Nef Reaction.
Authors: LUENING U. + , BAUMSTARK R. , MUELLER M. + , WANGNICK C. , SCHILLINGER F.
Published: May 2016

Protonation of the nitronate anion (I) (generated by KOtBu treatment of (IV)) leads to the product (II) of O‐protonation and Nef reaction or to the products (III) and (IV) of cis‐ or trans‐ C‐protonation.
ChemInform Abstract: Stereoselective Syntheses of Alcohols. Part 33. Addition of E‐ and Z‐Pentenylboronates to Ketones.
Authors: HOFFMANN R. W. , SANDER T.
Published: May 2016

The isomerically pure Z‐ and E‐pentenylboronates (II) and (III) are added to ketones such as (I) to give the homoallyl alcohols (VI)‐(IX) with different stereoselectivities.
ChemInform Abstract: Asymmetric Synthesis of α‐Substituted Benzyl Alcohols via the Stereoselective Addition of Nucleophiles to Homochiral Tricarbonyl(η6‐o‐triisopropylsilylbenzaldehyde)chromium(V).
Authors: DAVIES S. G. , GOODFELLOW C. L.
Published: May 2016

Benzaldehyde (I) is converted into the silylated chromium carbonyl complex (VII) which reacts with L‐valinol (VIII) in ether to yield a mixture of the imines (IX) and (X).
ChemInform Abstract: Synthesis of the Cyclophane Tetramethoxyturriane: A Derivative of the Phenolic Cyclophanes of Grevillea striata R. Br.
Authors: SARGENT M. V. , WANGCHAREONTRAKUL S.
Published: May 2016

In addition to the construction of the biphenylic bond in (IV), the oxidative coupling of the diyne (V) is the second key step in the synthesis of the title compound (VI).
ChemInform Abstract: A Facile Synthesis of Ethyl 3‐Aryl‐2,2‐dimethylcyclopropanecarboxylates, Intermediates for Pyrethroid Acaricides.
Authors: MITRA R. B. , MUTHUSUBRAMANIAN L.
Published: May 2016

The benzylidene(phenylsulfonyl)acetates (III) are coupled with the potassium salt (IV) of 2‐nitropropane, yielding the adducts (V), together with the desired cyclopropanes (VI).
ChemInform Abstract: Chiral Liquid Crystal Mesogens. Synthesis and Determination of Absolute Configuration of Mesogens with 4,4′‐Biphenanthryl Cores.
Authors: YAMAMURA K. , ONO S. , OGOSHI H. , MASUDA H. , KURODA Y.
Published: May 2016

The optically active dihydroxybiphenanthryl (I), obtained from the racemate by optical resolution on a chiral HPLC column, is alkylated with the alkyl halides (II) to produce the bisethers (III).
ChemInform Abstract: Trimethylsilyl Cyanide ‐ A Reagent for Umpolung. Part 18. Nucleophilic Acylation of α‐Chlorocarbonyl Compounds: A Novel and Diastereoselective Approach to Substituted α,β‐Epoxy Ketones.
Authors: HUENIG S. + , MARSCHNER C.
Published: May 2016

Addition products such as (I), (V) or (VIII) of trimethylsilyl cyanide with α,β‐unsaturated aldehydes, furfural or benzaldehyde, resp., react with α‐chlorocarbonyl compounds such as (II) or (IX) via 1,4‐O,O‐silyl rearrangement and cyanide elimination to give the O‐trimethylsilyl acyloins (III), (VI) or (X).
ChemInform Abstract: Amberlyst‐15 Promoted Synthesis of Fused and Spiro γ‐Butyrolactones from β‐Hydroxy Esters.
Authors: BUNCE R. A. , DRUMRIGHT R. E. , TAYLOR V. L.
Published: May 2016

The β‐hydroxy esters (I), (III), and (V) undergo dehydration and subsequent cyclization upon refluxing in the presence of a sulfonic acid resin, forming the γ‐lactones (II), (IV), and (VI) respectively.
ChemInform Abstract: Synthesis of Fused s‐Triazoles by Photocyclization.
Authors: DEVI M. R. , RAO J. M. , SRINIVASAN V. R.
Published: May 2016

Oxidative cyclization of the semicarbazones (III), derived from the hetaromatic aldehydes (II), gives the triazolones (IV).
ChemInform Abstract: Synthetic Hydrophilic Porphyrins. Preparations and Spectra of Alkoxycarbonylmethyl and Carboxymethyl Pyridinium Porphyrins.
Authors: ARNOLD D. P.
Published: May 2016

The tetraester (IIa) is isolated as dark violet and hygroscopic microcrystals, whereas crystals of (IIb) rapidly degrade to form a red powder.
ChemInform Abstract: A Crown Ether Tetrathiafulvalene Cage
Authors: BECHER J. , HANSEN T. K. , MALHOTRA N. , BOJESEN G. , BOEWADT S. , VARMA K. S. , GIRMAY B. , KILBURN J. D. , UNDERHILL A. E.
Published: May 2016

(V) (which shows two reversible one‐electron oxidation waves at +0.41 and +0.73 V in cyclic voltammetry vs.
ChemInform Abstract: Oxyfunctionalization of Hydrocarbons. Part 13. Electrophilic Oxygenation of Adamantane and Diamantane with Bis(trimethylsilyl) Peroxide/Trifluoromethanesulfonic Acid.
Authors: OLAH G. A. , ERNST T. D. , RAO C. B. , PRAKASH G. K. S.
Published: May 2016

The adamantane (I) is oxidized by bis(trimethylsilyl) peroxide in the presence of trifluoromethanesulfonic acid to give the oxahomoadamantane (II) as the main product.
ChemInform Abstract: Phosphorus‐Carbon Exchange Promoted by AlCl3: Reactivity of Heterocyclic Systems Containing the S‐P‐P Unit.
Authors: BACCOLINI G. , MEZZINA E.
Published: May 2016

Recently reported compounds such as (I) (obtained from aryl methyl sulfides such as (V) + PCl3/AlCl3) react surprisingly under Friedel‐Crafts conditions with acyl chlorides (II) to form initially trans‐(III), which rearrange instantaneously to cis‐(III).
ChemInform Abstract: (tBu)2GaAs(tBu)2: A Volatile Monomeric Arsinogallane.
Authors: HIGA K. T. , GEORGE C.
Published: May 2016

The title compound (III) crystallizes in the space group Pnma with Z=4.
ChemInform Abstract: Synthesis and Dynamic NMR Studies of Pentafluorobenzenethiolate Complexes of Molybdenum and Tungsten. The Crystal and Molecular Structures of (W(SC6F5)3(CO)(η5‐C5H5))·0.5 CH2Cl2 and (N(PPh3)2)(Mo(SC6F5)4(η5‐C5H5)).
Authors: BAKAR W. A. W. A. , DAVIDSON J. L. , LINDSELL W. E. , MCCULLOUGH K. J.
Published: May 2016

The reaction of the W complex (I) with an excess of the Tl thiolate (II) affords the WTl complex (IV) as the major product and the W complex (III) (space group P1, Z=2) as the minor product.
ChemInform Abstract: Preparation and Chemical Reactivities of the Tungsten Allenyl Complex CpW(CO)3CH=C=CH2.
Authors: KENG R.‐S. , LIN Y.‐C.
Published: May 2016

An estimation of the energy of activation for the conversion of the propargyl complex (III) to the η1‐allenyl complex (IV) possibly indicates 1,3‐tungsten sigmatropic rearrangement.
ChemInform Abstract: Synthesis, Electrochemistry, and Magnetic Properties of Binuclear Cobalt Complexes Containing the Co2(μ‐X)(μ‐carboxylato)n+ 2 Core (X: OH, Cl, or Br; n = 1‐3). The Crystal Structures of (CoII 2(μ‐ClH2CCO2)2(μ‐Cl)L2)PF6 and (CoIICoIII(μ‐MeCO2)2(μ‐OH)L2)(ClO4)2·0.5 H2O (L: N,N′,N′′‐Trimethyl‐1,4,7‐triazacyclononane).
Authors: CHAUDHURI P. , QUERBACH J. , WIEGHARDT K. , NUBER B. , WEISS J.
Published: May 2016

A series of the novel title complexes such as (IIIa) to (IIIe) are prepared under different conditions.
ChemInform Abstract: η5‐Cyclopentadienylcobalt‐Mediated Inter‐ and Intramolecular (2 + 2 + 2)Cycloadditions of Alkynes to Aldehydes and Ketones: A Novel Synthesis of Fused 2H‐Pyrans.
Authors: HARVEY D. F. , JOHNSON B. M. , UNG C. S. , VOLLHARDT K. P. C.
Published: May 2016

The α,ω‐diynes (I) are submitted to cyclization reaction with acetone (II) and the cobalt complex (III) to form the fused pyran Co complexes (IV).
ChemInform Abstract: Selective Oxidation of a Highly Substituted η4‐Cyclopentadienecobalt Complex: Partitioning Between Uncomplexed Diene and Cobalticinium Cation Products.
Authors: O'CONNOR J. M. , JOHNSON J. A.
Published: May 2016

The cobaltacyclopentadienes (I) react with ethyl diazoacetate (II) to produce the η4‐cyclopentadienecobalt complexes (III).
ChemInform Abstract: Nickel σ‐Sydnonyl Complexes, Stabilized by Tertiary Phosphines.
Authors: MOROZOVA L. N. , ISAEVA L. S. , PETROVSKII P. V. , KRAVTSOV D. N. , SE PHAN MINH SE PHAN MINH , KALININ V. N.
Published: May 2016

The title complexes (III) can also be prepared using 3‐phenyl‐sydnon‐4‐ylmercury chloride instead of (I).
ChemInform Abstract: Synthesis of (Diphenylphosphinothioyl)methyldiphenylphosphoniomethanide Complexes of Gold and Silver. X‐Ray Structure of (Au(C6F5)(SPh2PCH(Au(C6F5))PPh2Me)).
Authors: USON R. , LAGUNA A. , LAGUNA M. , NIEVES FRAILE M. , LAZARO I. , GIMENO M. C. , JONES P. G. , REIHS C. , SHELDRICK G. M.
Published: May 2016

Both the neutral methanide Au(III) complex (III) and the free methanide SPPh2CHPPh2Me react with the Au(I) complexes (IV), (VI), and (IX) or the Ag(I) complex (X) to afford binuclear complexes of the type (V) (space group P21/c, Z=4) and (VII), or (XI).
ChemInform Abstract: Synthetic Studies on Biologically Active Natural Compounds. Part 1. Stereospecific Transformation of Uvidin A into (‐)‐Cinnamodial.
Authors: GARLASCHELLI L. , VIDARI G.
Published: May 2016

Uvidin A (I) serves as starting material for the preparation of the triol (VI) which is oxidized at C‐11 and C‐12 to give the title compound (VII).
ChemInform Abstract: Synthesis of Ethynylglycine (FR‐900130).
Authors: WILLIAMS R. M. , ALDOUS D. J. , ALDOUS S. C.
Published: May 2016

The first synthesis of rac. N‐acetyl ethynylglycine (VII) is described.
ChemInform Abstract: 6‐Diazopenicillanates. Part 1. Reactions with Furans.
Authors: MATLIN S. A. , CHAN L. , CATHERWOOD B.
Published: May 2016

The mechanism of the title reaction is studied in detail using the diazoesters (I) on one hand and a range of furans on the other; some examples are given in the scheme.
ChemInform Abstract: Ceramic‐Metal Composite Produced by Melt Infiltration.
Authors: TOY C. , SCOTT W. D.
Published: May 2016

A method for the preparation of ceramic‐metal composites is described.
ChemInform Abstract: Non‐Isothermal Devitrification and Electrical Conductivity of Glasses Near the Li2SiO3 Composition.
Authors: PERNICE P. , ARONNE A. , MAROTTA A.
Published: May 2016

Five glasses of compositions near the lithium metasilicate composition are studied using DTA, XRD, and impedance analysis.
ChemInform Abstract: 57Fe Moessbauer Spectroscopy of Reduced Cathodes in the Li/FeS2 Battery System: Evidence for Superparamagnetism.
Authors: JONES C. H. W. , KOVACS P. E. , SHARMA R. D. , MCMILLAN R. S.
Published: May 2016

The 57Fe Moessbauer spectroscopic results obtained for cathodes removed from fully discharged Li/LiClO4‐propylene carbonate/FeS2 cells indicate that the major phase present is a mixture of superparamagnetic iron particles and bulklike α‐Fe.
ChemInform Abstract: A Thermodynamic Evaluation of the Cu‐Tl System
Authors: CHEVALIER P.‐Y.
Published: May 2016

is performed in order to produce reliable thermodynamic data for use in calculations of multi‐component systems (storage in a data base, SGTE).
ChemInform Abstract: Conversion of (MoS4)2‐ to (Mo2S2(μ‐S)2(S2)2)2‐ by Organic Disulfides: The Mechanism of an Induced Redox Reaction.
Authors: COYLE C. L. , HARMER M. A. , GEORGE G. N. , DAAGE M. , STIEFEL E. I.
Published: May 2016

The reactions outlined in the scheme are studied by EXAFS, UV/VIS, and EPR spectroscopy.
ChemInform Abstract: Studies with ClONO2: Thermal Dissociation Rate and Catalytic Conversion to NO Using an NO/O3 Chemiluminescence Detector
Authors: ANDERSON L. C. , FAHEY D. W.
Published: May 2016

(equipped with a gold catalyst).
ChemInform Abstract: Catalysis by Heteropoly Compounds. Part 15. Catalytic Oxidation and Isotopic Exchange of Hydrogen Over 12‐Molybdophosphoric Acid.
Authors: MIZUNO N. , WATANABE T. , MISONO M.
Published: May 2016

The H2‐D2 isotopic equilibration and exchange, the reduction of the catalyst by H2, and the catalytic oxidation of H2 are studied using H3PMo12O40·27.4 H2O (I) and Na2HPMo12O40·9.7 H2O (II) as catalysts.
ChemInform Abstract: 1,4‐Pentadien‐3‐ones. Part 31. 1‐(1‐Cyclohexenyl)‐2‐propen‐1‐ones: Synthesis, Properties, and Stereoselective Formation of 3‐Aryl‐4‐(1‐cyclohexenylcarbonyl)perhydro‐1‐naphthalenones by Sequential Michael Reaction.
Authors: RICHTER F. , OTTO H.‐H.
Published: May 2016

The lithium enolate of compound (I) reacts with the ketones (II) and aldehydes, e.g. (IV), to give the title alkenes (III) and (V), respectively.
ChemInform Abstract: Photochemistry of Silylimines: Diels‐Alder Trapping of a Photochemically Generated o‐Quinodimethane Intermediate from o‐(N‐Trimethylsilyliminomethyl)toluene.
Authors: KESSAR S. V. , SINGH T. , MANKOTIA A. K. S.
Published: May 2016

Irradiation of the trimethylsilylimine (I) in the presence of dimethyl fumarate (II) or dimethyl maleate (IV) results in cyclization to produce the aminotetralindicarboxylic acid diester (III) or a mixture of (III) and the lactam (V).
ChemInform Abstract: Vinyl Ethers with a Thiirane Cycle. Part 2. 2‐Mercaptoalkylation of Amines by 2‐Vinyloxyethoxymethylthiirane.
Authors: NEDOLYA N. A. , KOMEL'KOVA V. I.
Published: May 2016

The reaction between the thiirane (I) and the amines (II) affords the aminothiols (III) in fair to high yields.
ChemInform Abstract: α,α,ω‐Trihydroperfluoroalkoxysulfonylethenes and Their Reactions with Nucleophilic Reagents.
Authors: POPOV V. I. , SKRYNNIKOVA A. A. , BOGOLYUBSKII A. V.
Published: May 2016

The title compounds (III) are prepared by a novel and versatile procedure in improved yields.
ChemInform Abstract: Palladium‐Catalyzed Michael Addition Reaction of Ketone Enolates Generated by the Decarboxylation of Allyl β‐Keto Carboxylates Under Neutral Conditions.
Authors: NOKAMI J. , WATANABE H. , MANDAI T. , KAWADA M. , TSUJI J.
Published: May 2016

The decarboxylation of the cyclopentanonecarboxylate (I) is performed in the presence of various palladium catalysts in acetonitrile or tetrahydrofuran to yield mixtures of the products (II) ‐ (VII) due to cyclization, degradation, or dehydrogenation processes.
ChemInform Abstract: High Stereoselectivity in the 1,2‐Nucleophilic Additions to a Hindered 2‐Alkylidenecyclohexanone: An Example of Predominant Axial Attack by Sterically Demanding Nucleophiles.
Authors: KOREEDA M. , YOU Z.
Published: May 2016

Addition of various nucleophiles such as (II) to the highly hindered 2‐alkylidenecyclohexanone (I) yields a mixture of the 1,2‐ (III), (IV), and 1,4‐adducts (V).
ChemInform Abstract: Is Pseudorotation the Operational Pathway for Bond Shifting Within (8)Annulenes? Probe of Planarization Requirements by 1,3‐Annulation of the Cyclooctatetraene Ring. Kinetic Analysis of Racemization and 2‐D NMR Quantitation of π‐Bond Alternation and Ring Inversion as a Function of Polymethylene Chain Length.
Authors: PAQUETTE L. A. , WANG T.‐Z. , LUO J. , COTTRELL C. E. , CLOUGH A. E. , ANDERSON L. B.
Published: May 2016

The chiral 1,3‐bridged cyclooctatetraene (Xa) is synthesized in nine steps starting from the cyclododecenone (I).
ChemInform Abstract: Nucleophilic Fluorine Displacement Reactions. A Comparison of Reactivities of Polymer‐Supported Fluoride and Acid Fluorides P+F‐, nHF (n = 0‐2).
Authors: COUSSEAU J. , ALBERT P.
Published: May 2016

Organic bromides such as (I) are treated with polymer‐supported fluoride reagents, prepared from commercial anion exchange resins which are converted from the chloride to the hydroxide and then washed with aqueous HF.
ChemInform Abstract: Stereocontrolled Construction of Hydroazulenones by Sequential Anionic Oxy‐Cope Rearrangement‐SN′ Allylic Ether Displacement.
Authors: PAQUETTE L. A. , SHI Y.‐J.
Published: May 2016

Divinyl alcohols such as (I) undergo a stereocontrolled oxy‐Cope rearrangement upon heating with KH in THF in the presence of a crown ether to form polycyclic ketones such as (II) ‐ (IV).
ChemInform Abstract: A Convenient Synthesis of Optically Active 1H‐Aziridine‐2‐carboxylic Acids (Esters).
Authors: LEGTERS J. , THIJS L. , ZWANENBURG B.
Published: May 2016

The allylic alcohols (I) form the chiral epoxides (II) via Sharpless oxidation.
ChemInform Abstract: Synthetic Studies on O‐Heterocycles via Cycloadditions. Part 2. Adducts from Styrene Oxides.
Authors: CLAWSON P. , LUNN P. M. , WHITING D. A.
Published: May 2016

The styrene oxides (III) and (IX), bearing electron‐withdrawing functions, readily undergo thermal and photochemical (triplet sensitized) dipolar cycloadditions with simple electron‐deficient compounds such as (II), (IV), (VI), (X).
ChemInform Abstract: Novel Cycloadducts from the Reactions of (α,α‐Bis(3,3,3‐trifluoropropynyl))benzyl Benzoate and (1,1‐Bis(3,3,3‐trifluoropropynyl))ethyl Ethanoate with Furan.
Authors: BARLOW M. G. , TAJAMMAL S. , TIPPING A. E.
Published: May 2016

The alkadiynyl carboxylates (I) react with furan (II) in dichloromethane to give the cycloadducts (III), (IV), (VIb), (VIIb), and (VIIIa).
ChemInform Abstract: Effect of N‐Chloro Structure and 1‐Substituent on σ‐Substitution (Addition‐Elimination) in Pyrroles.
Authors: DE ROSA M. , CABRERA NIETO G. , FERRER GAGO F.
Published: May 2016

The reactions of 1‐substituted pyrroles such as (I) with various N‐chloro heterocycles, amides, or ureas is investigated.
ChemInform Abstract: Mixed Copper Zinc 2‐Aminobenzylic Organometallics as Efficient Reagents for the Synthesis of Heterocycles.
Authors: CHEN H. G. , HOECHSTETTER C. , KNOCHEL P.
Published: May 2016

The mixed organozinc cuprates (VII), prepared from the o‐toluidines (I), are coupled with the allyl bromides (VIII), the halo enone (X), or the acyl chlorides (XII) to give the (cyclo)alkenylanilines (IX) or (XI) or the indole derivatives (XIII).
ChemInform Abstract: Regioselective Addition Reactions of Organometallic Reagents with 3‐Benzylidene Heterocyclic Imines Leading to the Synthesis of Pyrrolizidines.
Authors: HUA D. H. , BENSOUSSAN D. , BRAVO A. A.
Published: May 2016

Coupling of 3‐benzylidene‐1‐pyrroline (I) with the Grignard reagent (II) yields the 2‐alkylated derivative (III).
ChemInform Abstract: Vinyl Ethers with a Cyclocarbonate Group. Part 3. Reaction with Carboxylic Acids.
Authors: NEDOLYA N. A. , ZINOV'EVA V. P. , TATAROVA T. F. , TROFIMOV B. A.
Published: May 2016

In the presence of catalytic amounts of perfluorobutyric acid the reactions between equimolar quantities of the title compounds (I) and (II) afford the hitherto unknown polyfunctional adducts (III) in quantitative yields.
ChemInform Abstract: Isolation of Azirino(1,2‐a)indole Derivatives by the Thermolysis of 2‐Alkenyl‐3‐azido‐2‐cyclohexen‐1‐ones.
Authors: NOGUCHI M. , ONIMURA K. , KAJIGAESHI S.
Published: May 2016

Thermal treatment of the 2‐allyl‐3‐azidocyclohexenones (I) results in formation of the tetrahydroindolones (II) and the hexahydroazirinoindolones (III).
ChemInform Abstract: Pyrimidines. Part 63. Novel Ring Transformations of 5‐Cyanouracils into 2‐Thiocytosines, 2,4‐Diaminopyrimidines, and Pyrimido(4,5‐d)pyrimidines by the Reaction with Thioureas and Guanidines.
Authors: HIROTA K. , SAJIKI H. , KITADE Y. , MAKI Y.
Published: May 2016

Novel ring transformations take place when thioureas (II) or guanidines (IV) react with cyanouracils (I), (VI) or (VIII).
ChemInform Abstract: N‐Nitroso and N‐Nitro Derivatives of Diazacycloalkanes and Tetraazabicycloalkanes from α,α′‐Diaminodicarboxylate Esters.
Authors: KUMAR G. , RAMAKRISHNAN V. T. , BOYER J. H.
Published: May 2016

Cyclization of the diaminoglutarate dihydrochloride (I) with formaldehyde (II) and subsequent N‐nitrosation with sodium nitrite (III) yield the dinitrosohexahydropyrimidinedicarboxylate (IV) as a mixture of cis‐and trans‐isomers.
ChemInform Abstract: Studies on Fused Pyrimidine Derivatives. Part 7. Preparation of Cyclopropa(4,5)pyrido(2,3‐d)‐ and Pyrrolo(2,3‐d)pyrimidine Derivatives Using Intramolecular Carbene Reactions.
Authors: NOGUCHI M. , FUJIMOTO N. , NAGASHIMA M. , KAJIGAESHI S.
Published: May 2016

The sodium salts of the heterocyclic allylamino tosylhydrazones (I) undergo ring closure reaction upon heating to give the octahydrocyclopropapyridopyrimidinediones (II).
ChemInform Abstract: Ring Cleavage Reaction of 1,3‐Oxazine‐2,4(3H)‐dione Derivatives with Amines.
Authors: KINOSHITA T. , TAKEUCHI K. , KONDOH M. , FURUKAWA S.
Published: May 2016

Ring cleavage of the title compounds (I) by thermal treatment with the amines (II) and (VIII) in ethanol (III) leads to the formation of the products shown in the reaction scheme.
ChemInform Abstract: Triazoles. Part 4. A New Unexpected Ring Closure from 3‐Amino‐1,5‐diaryl‐1H‐1,2,4‐triazoles.
Authors: BOZO E. K. , SZILAGYI G. , LANGO J. , PELCZER I.
Published: May 2016

The aminodiaryltriazoles (I) undergo cyclization reaction with 2,2'‐dithiobis(benzoyl chloride) (II) in the presence of a base to produce the triazolobenzothiadiazepines (III).
ChemInform Abstract: Intramolecular Cyclization of (ω‐Carboxyalkyl)sulfonium Salts. A Novel Synthesis of Macrocyclic Lactones.
Authors: MATSUYAMA H. , NAKAMURA T. , KAMIGATA N.
Published: May 2016

Reaction of diphenyl sulfide (I) with the ω‐iodocarboxylic acids (II) and silver perchlorate (III) yields the sulfonium salts (IV).
ChemInform Abstract: P‐Chiral Thioxaphosphoranesulfenyl Chlorides (RR1P(S)SCl). Unique Stereochemical Probe for the Nucleophilic Displacements at the Dicoordinate Sulfur.
Authors: LOPUSINSKI A. , LUCZAK L. , MICHALSKI J.
Published: May 2016

Treatment of the diastereomeric sulfenamides (I) and (III) with hydrogen chloride, generated in situ from chlorotrimethylsilane and ethanol, yields the thiophosphorylsulfenyl chlorides (II) or (IV).
ChemInform Abstract: Reactions of Chalcogens with Acetylenes. Part 6. Reaction of Chalcogens with Phenylacetylene and Alkyl Halides.
Authors: POTAPOV V. A. , AMOSOVA S. V. , KASHIK A. S. , GUSAROVA N. K. , TROFIMOV B. A.
Published: May 2016

The phenylethynyl alkyl selenides (IV) are prepared by an improved and higher yielding method.
ChemInform Abstract: Cyclic Selenonium exo‐Ylides (3,4‐Dihydro‐1H‐2‐benzoselenin‐2‐io)methanides; Syntheses and Reactions.
Authors: HORI M. , KATAOKA T. , SHIMIZU H. , TSUTSUMI K. , HU Y.‐Z. , NISHIGIRI M.
Published: May 2016

Reactions of the title compounds (III) are investigated giving the products shown in the scheme.
ChemInform Abstract: Enantiomerically Pure 7‐Oxabicyclo(2.2.1)hept‐5‐en‐2‐yl Derivatives (“Naked Sugars”) as Synthetic Intermediates. Part 11. Total Syntheses of (‐)‐Conduritol B (V) ((‐)‐1L‐Cyclohex‐5‐ene‐1,3/2,4‐tetrol) and of (+)‐Conduritol F (IV) ((+)‐1D‐Cyclohex‐5‐ene‐1,2,4/3‐tetrol). Determination of the Absolute Configuration of (+)‐Leucanthemitol.
Authors: LE DRIAN C. , VIONNET J.‐P. , VOGEL P.
Published: May 2016

To solve literature ambiguities, the title compounds (V) and (VI) are prepared stereospecifically starting from the "naked sugar" (+)‐(I), and (+)‐conduritol F (V) is found to be identical with natural (+)‐leucanthemitol.
ChemInform Abstract: Chemistry of O‐Silylated Ketene Acetals: Stereocontrolled Synthesis of 3‐Benzoylamino‐2,3‐dideoxypentoses by a 1,3‐Addition of Chiral Nitrones.
Authors: KITA Y. , TAMURA O. , ITOH F. , KISHINO H. , MIKI T. , KOHNO M. , TAMURA Y.
Published: May 2016

1,3‐Addition of the ketene silyl acetals (II) to the chiral nitrones (I) leads to the formation of mixtures of the syn‐ (III) and anti‐adducts (IV).
ChemInform Abstract: Reaction of Lithium Trifluoroboratoalkynides with 2,3‐Epoxy‐6‐oxabicyclo(3.3.0)octan‐7‐ol. Synthesis of 13,14‐Didehydro Analogues of Prostaglandin F2α.
Authors: LOPP M. I. , PAYU A. U. , NIIDAS P. A. , VALIMYAE T. K. , PEHK T. K. , LILLE U. E.
Published: May 2016

The reaction between the bicyclo compound (I) and the in situ generated lithium compounds (II) proceeds at the epoxy moiety of (I) to yield a separable mixture of the regioisomers (III) and (IV) with a low selectivity.
ChemInform Abstract: Effects of Surface‐Active Agents on Platinum Dispersion Supported on Acetylene Black.
Authors: HONJI A. , TAKEUCHI S. , MORI T. , HISHINUMA Y.
Published: May 2016

The preparation of Pt dispersions on acetylene black by reduction of chloroplatinic acid with MeOH is performed in the presence of fourteen different nonionic surface‐active agents.
ChemInform Abstract: Hydride Formation at Ni‐Containing Glassy‐Metal Electrodes During the H2 Evolution Reaction in Alkaline Solutions.
Authors: VRACAR L. , CONWAY B. E.
Published: May 2016

Electrocatalytic behavior of the amorphous alloys Ni66.5Mo23.5B10, Ni56.5Mo23.5Cr10B10, Ni56.5Mo23.5Fe10B10, Ti60Ni40, and Ti30Ni40V30 are examined with reference to the role of near surface hydride formation and the participation of sorbed H during cathodic H2 evolution in alkaline solution.
ChemInform Abstract: Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Chloride‐Doped Lead Dioxide Electrodes.
Authors: HSIAO Y.‐L. , JOHNSON D. C.
Published: May 2016

The rate constants for the oxidation of Mn2+, toluene, Ph‐CH2OH, Ph‐CHO, and DMSO in acidic media at PbO2 film electrodes (Pt and Au substrates) are significantly increased by incorporation of Cl‐ into the oxide film.
ChemInform Abstract: Electrocatalytic Oxidations at Electrodeposited Bismuth(III)‐Doped β‐Lead Dioxide Film Electrodes.
Authors: LACOURSE W. R. , HSIAO Y.‐L. , JOHNSON D. C. , WEBER W. H.
Published: May 2016

It is found that the electrocatalytic activity for anodic oxygen‐transfer reactions at PbO2 electrodes can be increased by Bi(III)‐doping.
ChemInform Abstract: Sextett Rearrangements as Solvent Polarity Probes.
Authors: LANGHALS H. , HADIZAMANI K.
Published: May 2016

The rate constant of the Chapman variant of the Beckmann rearrangement of the anti‐ketoximpicrates (I) is used as a solvent polarity probe and is mainly influenced by the polarizability of the solvent.
ChemInform Abstract: Molecular Structure of (nido‐7,9‐(CH3)2‐7,9‐C2B10H11)‐: The Kinetic Product Formed by Protonation of (nido‐(CH3)2C2B10H10)2‐.
Authors: GETMAN T. D. , KNOBLER C. B. , HAWTHORNE M. F.
Published: May 2016

The structure of the unstable kinetic protonation product, which is obtained beside a stable thermodynamic product, is established as the anion (I) (space group P21/n, Z=4).
ChemInform Abstract: New Role of Tin(II) Compounds in Organic Synthesis.
Authors: MUKAIYAMA T. , KOBAYASHI S.
Published: May 2016

Three new carbon‐carbon bond forming reactions, which use new catalyst systems involving Sn(II) compounds are described: 1. a combination of trityl chloride and SnCl2 (see A)), an efficient and extremely mild catalyst system, promotes aldol and Michael reactions.
ChemInform Abstract: A Laser Flash Photolysis Study of Carbonyl Ylides of Arylchlorocarbenes: Kinetics and Reversibility of the Formation, Cyclization, and Cycloaddition.
Authors: BONNEAU R. , LIU M. T. H.
Published: May 2016

Laser flash photolysis or thermal decomposition of diazirines (I) leads to carbenes (II) which react with acetone (III) or benzaldehyde to give carbonyl ylides of type (IV).
ChemInform Abstract: Oxidation of Alcohols to Carbonyl Compounds Using Chromic Anhydride‐Chlorotrimethylsilane‐Alumina.
Authors: LEE J. G. , HA D. S.
Published: May 2016

In the presence of basic Al2O3, prim. and sec. alcohols as well as aromatic ones such as (I) and (III) are oxidized probably by the species chromyl chloride or polyoxochromium(VI) dichloride resulting from CrO3 and Me3SiCl.
ChemInform Abstract: Nickel Boride Desulfurization of α,β‐Unsaturated Ethylene Dithioacetals.
Authors: ZAMAN S. S. , SARMAH P. , BARUA N. C. , SHARMA R. P.
Published: May 2016

Seven α,β‐unsaturated ethylene dithioacetals such as (I), (III), and (V) are desulfurized by nickel boride, generated in situ from nickel chloride and sodium borohydride, to produce the corresponding alkenes (II) and (IV).
ChemInform Abstract: Chirality Transfer in the 1,5‐Hydride Shift of a Stannyl Compound Having Cationic Center at δ‐Position.
Authors: SATO T. , HARAMURA M. , TAKA N.
Published: May 2016

The chiral oxirane (S)‐(I) is alkylated and cleaved to give the tosylate (IV) which is converted to the trimethylstannyl compound (R)‐(VI).
ChemInform Abstract: Trimethylsilyl Esters: Temporary Protection of Carboxlyic Acids During Hydroboration Reactions.
Authors: KABALKA G. W. , BIERER D. E.
Published: May 2016

10‐Undecenoic acid (I) is converted to the silyl ester (III) and then subjected to hydroboration reaction with various boranes to yield the hydroxyundecanoic acid (IV) or undecanoic acid (V) depending on the work‐up conditions.
ChemInform Abstract: Synthesis and Chemistry of Highly Fluorinated Bicyclo(2.2.0)hexenones.
Authors: SOELCH R. R. , MCNIERNEY E. , TANNENBAUM G. A. , LEMAL D. M.
Published: May 2016

Treatment of hexafluoro Dewar benzene (I) with potassium tert‐butoxide (II) produces the enol ether (III) which gives exo‐3‐bromopentafluorobicyclo(2.2.0)hex‐5‐ene‐2,2‐diol (IV) upon consecutive reaction with bromine and water.
ChemInform Abstract: Novel Ni(0)‐Catalyzed Preparation of 3‐Cyclopentene Carboxylic Acid Anilides from Cyclopentenes and Phenyl Isocyanate.
Authors: HOBERG H. , NOHLEN M.
Published: May 2016

The Ni(0)‐catalyzed title reaction provides the 3‐substituted products (III) or (VI) with high selectivity.
ChemInform Abstract: α‐Amino Acids of the Adamantane Series. Part 3. Deamination as a Way of Synthesis of Homoadamantane Derivatives.
Authors: KRASUTSKII P. A. , SEMENOVA I. G. , SAFRONOVA E. E. , NOVIKOVA M. I. , YURCHENKO A. G.
Published: May 2016

Deamination of the title compounds (I) with the aim to synthesize the homoadamantanes (III) is best achieved with NaNO2 in 70% H2SO4 at 75 °C. Acids other than H2SO4 lower concentrated H2SO4 or lower temp. do not afford the desired homoadamantanes.
ChemInform Abstract: Fluorination Reactions with HF/THF Medium ‐ Solvolysis of N‐Tosyl‐O‐phenylhydroxylamine.
Authors: DOLBIER W. R. JUN. , CELEWICZ L. , OHNISHI K.
Published: May 2016

N‐Tosyl‐O‐phenylhydroxylamine (I) is treated with hydrogen fluoride in THF to form the 4‐fluorophenol (II), together with the rearranged iminosulfonate (III).
ChemInform Abstract: High‐Temperature Benzoylation.
Authors: MIL'TO V. I. , MIRONOV G. S. , KOPEIKIN V. V.
Published: May 2016

The high‐temp.
ChemInform Abstract: Synthesis of Air and Light Sensitive cis‐Phenolic Cyclopropane Derivatives.
Authors: AFZAL J. , MAGARIAN R. A. , GRIFFIN M. , PENTO J. T.
Published: May 2016

Condensation reaction of the benzaldehydes (I) with the phenylacetic acids (II), followed by decarboxylation, yields the cis‐1,2‐diarylethenes (IV) which are cyclopropanated with dichlorocarbene to form the diaryldichlorocyclopropanes (VI).
ChemInform Abstract: Novel Human Hair Dyes. Part 4. The Alkylamination of Naphthazarin.
Authors: KIKUCHI M. , KOMATSU K. , NAKANO M.
Published: May 2016

Naphthazarin (I) reacts with n‐butylamine (II) to give the diamino derivatives (III) and (IV) as the main products, together with the monoamines (V) and (VI).
ChemInform Abstract: Molecular and Electronic Structure of Pyracylene.
Authors: FREIERMUTH B. , GERBER S. , RIESEN A. , WIRZ J. , ZEHNDER M.
Published: May 2016

To enlighten discrepancies in the literature on (IV), the title compound is prepared and is found to be quite stable (after careful purification) to irradiation both as a solid and in solution.
ChemInform Abstract: Studies on Structurally Simple α,β‐Butenolides. Part 9. A Short and Efficient Synthesis of E‐5‐Ethylidene‐2(5H)‐furanone.
Authors: FONT J. , ORTUNO R. M. , SANCHEZ‐FERRANDO F. , SEGURA C. , TERRIS N.
Published: May 2016

Treatment of the dienoic acid (I) with aqueous bromine produces the cis‐1,2‐bromohydrin (II) which undergoes base‐induced ring closure, forming the oxirane (III).
ChemInform Abstract: Benzoid‐Quinoid Tautomerism of Azomethines and Their Structural Analogs. Part 46. Synthesis and Transformations of 2‐(N‐Isatinomethylene)benzo(b)thiophen‐3(2H)‐one.
Authors: BREN' ZH. V. , RYBALKIN V. P. , BREN' V. A.
Published: May 2016

The benzothiophenecarboxaldehyde (I) reacts with isatinic acid potassium salt (II) to give the aminomethylene derivative (III) which is transformed into the title compound (IV) upon heating in acetic anhydride.
ChemInform Abstract: Chemistry of Isoindoles and Isoindolenines. Part 36. Reactions of 2‐Alkyl‐2H‐isoindoles with Maleic Imides.
Authors: KREHER R. P. , SEUBERT J. , SCHMITT D. , USE G. , KOHL N. , MULETA T.
Published: May 2016

Simply accessible alkylisoindoles such as (I) react with maleimide derivatives such as (II) to give endo adducts such as (III) some of which are transformed to the more stable exo isomers on heating, e.g. (IIIa) → (IV).
ChemInform Abstract: Chloramine‐T in Heterocyclic Synthesis. A Simple Procedure for the Generation of Nitrilimines and Its Application to the Synthesis of Pyrazolines.
Authors: RAI K. M. L. , HASSNER A.
Published: May 2016

The phenylhydrazones (I) derived from aliphatic or aromatic aldehydes are treated with chloramine T to generate the nitrilimines (II).
ChemInform Abstract: Host‐Guest Complexation. Part 52. Bridged and Chiral Hemispherands.
Authors: TUCKER J. A. , KNOBLER C. B. , GOLDBERG I. , CRAM D. J.
Published: May 2016

The macrocyclic compound (VI) is synthesized from the quaterphenyldicarboxylic acid (I) as shown in the reaction scheme.
ChemInform Abstract: Cp2TiPh2‐Catalyzed Silylation of Alcohols.
Authors: NAKANO T. , NAGAI Y.
Published: May 2016

The reported silylation of prim. alcohols affords dialkoxysilanes such as (IVa) and (IVb) predominantly.
ChemInform Abstract: 1,3‐Benzodiphospholes. Chemistry of Benzo‐Anellated 1,3‐Elementphospholes.
Authors: ISSLEIB K. , SCHMIDT H. , LEISSRING E.
Published: May 2016

The reaction of the acyl chlorides (II) with 1,2‐bis(lithio(trimethylsilyl)phosphino)benzene in situ leads to the formation of the 2‐substituted 1,3‐benzodiphosphole anions (III) in solution which can be stabilized as η1‐ or η5‐coordinated moieties as demonstrated for (IIIa) in (IV) (yield 80%) and (V).
ChemInform Abstract: Conversion of Diallyl Selenide into 1,3,5‐Hexatriene in the System KOH‐DMSO.
Authors: MUSORIN G. K. , AMOSOVA S. V. , KOPYLOVA I. G. , SHCHERBAKOV V. V. , KEIKO V. V.
Published: May 2016

The title reaction unexpectedly affords the 1,3,5‐hexatriene (III) as the main product instead of the expected di(propen‐1‐yl) selenide.
ChemInform Abstract: Alkali Metal Salts of Octamethylcyclotetrasilazanes ‐ Synthesis and Crystal Structures.
Authors: DIPPEL K. , KLINGEBIEL U. , KOTTKE T. , PAUER F. , SHELDRICK G. M. , STALKE D.
Published: May 2016

The title compounds (IV), (VI) and (VIII) crystallize as dimeric THF adducts.
ChemInform Abstract: Phosphine Complexes of Trivalent Early Transition Metals. X‐Ray Crystal Structure of the d1‐d1 Dimer (TiCl3(dippe))2 and Synthesis of the Alkyl CrMeCl2(dippe)(THF).
Authors: HERMES A. R. , GIROLAMI G. S.
Published: May 2016

Dependent of the solvent used, TiCl3(THF)3 reacts with the diphosphine (II) to give different products.
ChemInform Abstract: A Water‐Stable Manganese(V)‐Oxo Complex: Definitive Assignment of a νMn(V)O Infrared Vibration.
Authors: COLLINS T. J. , POWELL R. D. , SLEBODNICK C. , UFFELMAN E. S.
Published: May 2016

The manganese(V)‐monooxo complex (IVb) of a new macrocyclic tetraamide ligand, which is water‐stable, crystallizes in the space group P21/c with Z=4.
ChemInform Abstract: Two Iron(0) Tricarbonyl Complexes with Substituted Norbornadienes.
Authors: WATSON W. H. , NAGL A. , KASHYAP R. P. , MARCHAND A. P. , DAVE P. R.
Published: May 2016

Both the complexes (III) have a trigonal‐bipyramidal geometry.
ChemInform Abstract: Synthesis and Characterization of Copper(II)‐Acetazolamide (5‐Acetamido‐1,3,4‐thiadiazole‐2‐sulfonamide) Complexes. Crystal Structure of Dimeric (Cu(Acm)(NH3)2(OH2))2·2 H2O.
Authors: FERRER S. , BORRAS J. , MIRATVILLES C. , FUERTES A.
Published: May 2016

Reaction of the organic ligand with CuCl2 in hot EtOH leads ‐ dependent on the conditions used ‐ to the crystalline compounds (I) (P1, Z=1) and (II).
ChemInform Abstract: Synthesis of 2‐Azo‐3‐cyano‐5‐carbethoxythiophene Derivatives and Their Application on Polyester Fibres.
Authors: SABNIS R. W. , RANGNEKAR D. W.
Published: May 2016

The aminothiophene (IV), prepared by reaction of the acetonedicarboxylate (I) with malononitrile (II) and sulfur (III), is diazotized with nitrosyl sulfuric acid (V) to form the diazonium salt (VI).
ChemInform Abstract: Synthesis of Plectranthons, Diterpenoid Phenanthrene‐1,4‐diones.
Authors: KALIAKOUDAS D. , EUGSTER C. H. , RUEEDI P. +
Published: May 2016

The title compounds (IV) are synthesized using the procedure described for (IVa).
ChemInform Abstract: Synthetic Studies Directed Toward the Pseurotins. Part 1. Synthesis of Related Furan‐3(2H)‐ones.
Authors: DOLDER M. , SHAO X. , TAMM C.
Published: May 2016

As a part of studies concerned with the total synthesis of pseurotin A (VII), a secondary metabolite of Pseudeurotium ovalis Stolk, the title furan derivative (VI) is synthesized.
ChemInform Abstract: Electrocatalysis of Oxyhalide Reduction by Dissolved Halogens in Lithium Anode Cells.
Authors: KLINEDINST K. A.
Published: May 2016

The mechanism of the catalysis of the electroreduction of SOCl2 in Li‐SOCl2 cells by halogen additives, particularly I2, is studied.
ChemInform Abstract: The Nickel Electrode: A Potential‐Modulated Reflectance (PMR) Study.
Authors: LARRAMONA G. , GUTIERREZ C.
Published: May 2016

The PMR results obtained for a Ni electrode over the pH range 1‐14 and a wide range of polarization potentials indicate that NiO is present in the passive and transpassive film, both in acidic and alkaline media.
ChemInform Abstract: Acidity and Catalytic Activity of Zirconium and Titanium Sulfates Heat‐Treated at High Temperature. Solid Superacid Catalysts.
Authors: ARATA K. , HINO M. , YAMAGATA N.
Published: May 2016

Among the samples heat‐treated above 500 °C, the highest activities for cracking of cumene are observed for the products obtained by calcination at 725 °C for Zr(SO4)2 and at 625 °C for Ti(SO4)2.
ChemInform Abstract: The Catalytic Activity of Hydrous Zirconium Oxide Calcined at Several Temperatures.
Authors: SHIBAGAKI M. , TAKAHASHI K. , KUNO H. , MATSUSHITA H.
Published: May 2016

The surface properties and the catalytic activity of hydrous zirconium oxide, an amorphous solid, are shown to change with its calcination temperature.
ChemInform Abstract: Preparation of Fine Metal and Alloy Powders.
Authors: BOENNEMANN H. + , BRIJOUX W. , JOUSSEN T.
Published: May 2016

Microcrystalline or amorphous powders of 18 different metals (e.g.
ChemInform Abstract: High‐Pressure NMR Studies of ((η3‐C5H5)(η5‐C5H5)Cr(CO)2). Evidence for Concerted Ring Interchange.
Authors: MILLAR J. M. , KASTRUP R. V. , HARRIS S. , HORVATH I. T.
Published: May 2016

The reversible reaction of (I) with CO to give the two forms of the title complex is not induced by CO elimination/addition with "ring slippage" but rather by a concerted straightening and bending of the two C5H5‐rings.
ChemInform Abstract: Organometallic Acceptors in Molecular‐Based Materials: Field‐Dependent Magnetic Behavior of an Organovanadium Charge‐Transfer Salt.
Authors: MORSE D. B.
Published: May 2016

The reaction of 2 equiv. of tetramethyltetrathiofulvalene with the organometallic acceptor η5‐methylcyclopentadienylvanadium trichloride in CH2Cl2, followed by partial oxidation affords the 3:2‐charge‐transfer complex salt (I) (20% yield), crystallizing in P1 with Z=2.
ChemInform Abstract: Enantio‐Differentiating Hydrogenation of 2‐Alkanones over Asymmetrically Modified Nickel Catalyst and Its Application to the Preparation of Optically Pure 2‐Alkanols.
Authors: OSAWA T. , HARADA T. , TAI A.
Published: May 2016

2‐Alkanones such as (I) (used in most experiments) are stereospecifically hydrogenated over modified Raney‐Ni with an average optical yield of about 80% (optimum conditions).
ChemInform Abstract: Asymmetric Deprotonation of Prochiral Ketones Using Chiral Lithium Amide Bases.
Authors: CAIN C. M. , COUSINS R. P. C. , COUMBARIDES G. , SIMPKINS N. S.
Published: May 2016

A number of chiral sec. amines such as those delineated in the scheme are prepared and used as precursors to the corresponding chiral lithium amide bases.
ChemInform Abstract: Kinetics and Mechanism of Solvolysis of N‐Aryl Sulfuric Diamides.
Authors: KAVALEK J. , KRALIKOVA U. , MACHACEK V. , SEDLAK M. , STERBA V.
Published: May 2016

Three mechanisms are operating in the solvolysis of (I): addition‐elimination mechanism for neutral (I), E1cB in the presence of solvent lyate ions, and general acid‐catalysis for the conjugated bases of (I).
ChemInform Abstract: (2 + 3) Cycloaddition Reactions of Nitriles with Bis(triphenylphosphoranyliden)iminium Azide.
Authors: SUNDERMEYER J. , ROESKY H. W. , NOLTEMEYER M.
Published: May 2016

The title compound (I) and tetramethylammonium azide (VIII) undergo (2 + 3) cycloaddition reactions with (CN)2 (II) and with the isomeric dicyanothiadiazoles (V) or, respectively, (VI) to afford the adducts (III), (IV), (VII) or (IX) in high yields.
ChemInform Abstract: The Diels‐Alder Reaction of 3‐Acetoxy‐1‐vinylcyclohexene with Methyl Vinyl Ketone.
Authors: KAWAMATA T. , HARIMAYA K. , IITAKA Y. , INAYAMA S.
Published: May 2016

Reduction of the vinylcyclohexenone (I) with lithium alanate and subsequent acetylation with acetic anhydride (II) yield the acetoxyvinylcyclohexene (III) which undergoes cycloaddition reaction with methyl vinyl ketone (IV) to produce the acetoxyacetyloctalins (V) ‐ (VIII) and (XI).
ChemInform Abstract: Intramolecular α‐Amidoyl to Aryl 1,5‐Hydrogen Atom Transfer Reactions. Heteroannulation and α‐Nitrogen Functionalization by Radical Translocation.
Authors: SNIECKUS V. , CUEVAS J.‐C. , SLOAN C. P. , LIU H. , CURRAN D. P.
Published: May 2016

α‐Benzamidoyl radicals generated from o‐halobenzamides by 1,5‐hydrogen atom transfer undergo a variety of new radical addition and cyclization reactions providing various final products such as (II), (IV), (VI) + (VII), (IX), (XI) + (XII).
ChemInform Abstract: Beckmann Rearrangement of (Z)‐ and (E)‐Oximes of 2‐Aryl‐4,5,6,7‐tetrahydro‐6,6‐dimethyl‐2H‐benzo(d)(1,2,3)triazol‐4‐ones and 4,5,6,7‐Tetrahydro‐6,6‐dimethylbenzo(c)(1,2,5)oxadiazol‐4‐ones.
Authors: MITKIDOU S. , STEPHANIDOU‐STEPHANATOU J. , TSOLERIDIS C. A. , ALEXANDROU N. E.
Published: May 2016

The title compounds (III) and (IV) are prepared from (I) but only (Z)‐oximes (III) undergo Beckmann rearrangement to give azepinones (V) (accompanied by ca. 5% (I) and 2‐3% of starting material (III)).
ChemInform Abstract: The Fries Rearrangement of Phenyl p‐Nitro, p‐Chloro, and p‐Methylbenzoates.
Authors: YAMAMOTO J. , ISHIKAWA T. , OKAMOTO Y.
Published: May 2016

Heating of the p‐substituted phenyl benzoates (I) with aluminum trichloride without solvents results in acyl migration according to Fries, yielding the ortho‐ (II) and para‐hydroxybenzophenones (III).
ChemInform Abstract: Enantioselective Hydrosilylation of Acetophenone with Rhodium/Oxazolines Catalysts.
Authors: BALAVOINE G. , CLINET J. C. , LELLOUCHE I.
Published: May 2016

The chiral pyridyloxazolines (III), prepared from 2‐cyanopyridine (I) and the optically active amino diol (II) or analogues, are employed as ligands in the rhodium catalyzed hydrosilylation of acetophenone (IV) to give the carbinol (R)‐(V).
ChemInform Abstract: Optically Active Bipyridines in Asymmetric Catalysis.
Authors: BOLM C. , ZEHNDER M. , BUR D.
Published: May 2016

The synthesis of the (R,R)‐configurated title compounds (I) is described and the X‐ray structure is reported for the adduct (Ib)·CoCl2 (space group C2, Z=2).
ChemInform Abstract: Organotin Triflate Promoted Carbonyl Activation. Does Acetalization Deactivate or Activate Carbonyl Groups?
Authors: SATO T. , OTERA J. , NOZAKI H.
Published: May 2016

Dibutyltin bis(triflate) is found to catalyze the addition of silyl nucleophiles to carbonyl groups in a quite unusual manner leading to synthetically promising differentiation of carbonyl groups.
ChemInform Abstract: Chemoselective Reduction of N‐Alkyl‐N‐hydroxyoxamic Acid Esters with Sodium Borohydride to Give Glycolohydroxamic Acids.
Authors: GEFFKEN D. , BURCHARDT A.
Published: May 2016

The reduction mentioned in the title is only successful when an ethanolic solution of the hydroxamates (I) is added to sodium borohydride in ethanol, yielding the α‐hydroxy hydroxamic acids (II).