bluuebunny/crossref_metadata_2025 huggingface dataset:
ChemInform Abstract: Use of 3‐(Arylsulfonyl)‐2‐cycloalkenones as Synthesis Equivalents of 2‐Cycloalkynones.
Authors: KIENZLE F. , MINDER R. E.
Published: May 2016

In order to obtain synthetic equivalents for 2‐cyclopentynone and 2‐cyclohexynone, compounds which are unknown and not able to exist, the tricyclics (IV) are synthesized.
ChemInform Abstract: Tetracyclo(5.1.0.0.0)octane: Some Unexpected Addition Reactions and a New Synthesis.
Authors: BELZNER J. , SZEIMIES G.
Published: May 2016

Photochemical reaction of the bridged propellane (I) with the compounds (II) results in cleavage of the central bond, yielding the adducts (III), together with minor amounts of the oligomers (IV) and (V).
ChemInform Abstract: An Attempted Synthesis of Tricyclo(5.5.0.04,10)‐1(7),4(10)‐dodecadiene.
Authors: MCMURRY J. E. , SWENSON R.
Published: May 2016

The methoxytetralone (I) is subjected to ring expansion and reduction, producing the bicyclic hydroxy enone (VI).
ChemInform Abstract: Derivatives of N‐Hydroxysulfamide: Preparation and Reactions.
Authors: DUSEMUND J. , SCHURREIT T.
Published: May 2016

Reaction of the sulfamoyl chlorides (I) with the O‐alkylhydroxylamines (II) yields the alkoxysulfamides (III).
ChemInform Abstract: The Zirconocene Induced Coupling of Benzyne with Nitriles: Synthesis, Structure, and Reactions of Novel Azametallacyclopentenes.
Authors: BUCHWALD S. L. , SAYERS A. , WATSON B. T. , DEWAN J. C.
Published: May 2016

Dicyclopentadienylzirconium dichloride (I) reacts with benzene (II) to give the aryne complex (III) which undergoes cyclization with the nitriles (IV), yielding the benzofused azazirconiacyclopentenes (V).
ChemInform Abstract: Tartaric Acid, an Efficient Chiral Auxiliary: New Asymmetric Synthesis of 2‐Alkyl‐2‐arylacetic Acids.
Authors: CASTALDI G. , CAVICCHIOLI S. , GIORDANO C. , UGGERI F.
Published: May 2016

The dioxolanes (I), derived from tartaric acid, are brominated to give a mixture of the diastereomeric α‐bromo derivatives (II) with predominance of the S‐isomers.
ChemInform Abstract: Spiro Asymmetric Induction. Part 3. Synthesis of Optically Pure Syn or Anti α,β‐Dihydroxy Esters by the Aldol Condensation of Chiral Glycolate Enolates.
Authors: PEARSON W. H. , CHENG M.‐C.
Published: May 2016

The dioxolanones (I) are metallated and then coupled with the aldehydes (II), producing the adducts (III).
ChemInform Abstract: Synthesis, Structure and Reactivity of N‐(2,2‐Dichloroethylidene)arenesulfonamides from 1,2‐Dichloroethene and N,N‐Dichloroarenesulfonamides.
Authors: DROZDOVA T. I. , MIRSKOVA A. N. , LEVKOVSKAYA G. G. , KALIKHMAN I. D. , VORONKOV M. G.
Published: May 2016

The title compounds (III) are prepared from the N,N‐dichloroarenesulfonamides (I) and 1,2‐dichloroethene (II) according to method A).
ChemInform Abstract: Reduction of 1,2‐Thiazetidine 1,1‐Dioxides.
Authors: MEYLE E. , OTTO H.‐H.
Published: May 2016

The β‐sultams (I) are reductively cleaved with a complex aluminum hydride, yielding the aminomercaptans (II).
ChemInform Abstract: Diels‐Alder Reactions of 4,4‐Dimethyl‐2‐cyclohexenones. A Direct Route to the 4,4‐Dimethyl‐1‐decalones.
Authors: LIU H.‐J. , BROWNE E. N. C.
Published: May 2016

Diels‐Alder reaction of the enone (I) and the dienes (II) yields the adducts (III), whose structures are established by spectroscopic (1H, 13C NMR) and chemical techniques (aromatization of (IIIa) yields (IV); epimerization of (IIIa)‐(IIIc) gives (V)).
ChemInform Abstract: Existence and Reactivity of Bicyclic Annulenones. Part 2. Bicyclo‐(3.3.3)octa‐1(5),3,7‐triene‐2,6‐dione.
Authors: GAVINA F. , COSTERO A. M. , GONZALEZ A. M. , LUIS S. V.
Published: May 2016

The bromocyclopentenone (I) reacts with the silver acrylate (II) to produce the ester (III) which is cyclized with polyphosphoric acid to give the bicyclic dienediones (IV) and (V).
ChemInform Abstract: The Iodination of Fluorene to 2,7‐Diiodofluorene.
Authors: BANSAL R. C. , EISENBRAUN E. J. , RYBA R. J.
Published: May 2016

Several methods of preparing 2,7‐diiodofluorene (II), which is used as a standard for mass spectroscopy, are discussed.
ChemInform Abstract: Formation of Cyclic “ortho”‐Anhyrides of Heptalene‐1,2‐dicarboxylic Acids.
Authors: WEBER R. H. , BRUEGGER P. + , ARNOLD W. , SCHOENHOLZER P. + , HANSEN H.‐J.
Published: May 2016

The half‐esters (I) react with the iminium salt formed from DMF (II) and oxalyl chloride (III) in the presence of alcohols (Va)‐(Vc) (i.e.
ChemInform Abstract: Metal‐Catalyzed Intramolecular Cyclization of 2‐Diazo‐4‐(4‐indolyl)‐3‐ oxobutanoic Acid Esters.
Authors: MATSUMOTO M. , WATANABE N. , KOBAYASHI H.
Published: May 2016

The diazoindolyloxobutanoates (I) undergo cyclization reaction in the presence of a rhodium catalyst, producing the tricyclic ketones (II).
ChemInform Abstract: Asymmetric Synthesis Using Chiral Acetals: Studies on the Nucleophilic Addition of Organometallics to Chiral α‐Keto Acetals in Cyclic Systems.
Authors: TAMURA Y. , ANNOURA H. , KONDO H. , FUJI M. , YOSHIDA T. , FUJIOKA H.
Published: May 2016

The dimethyl acetals (I) are treated with the chiral diols (II) to produce the hydroxy spiroacetals (III) which are oxidized to form the ketones (IV).
ChemInform Abstract: Reaction of 1‐Dialkylamino‐1‐butyn‐3‐ones with Hydrazine and Substituted Hydrazines.
Authors: OSTROUMOV I. G. , TSIL'KO A. E. , MARETINA I. A. , PETROV A. A.
Published: May 2016

The title compounds (III) are prepared as shown.
ChemInform Abstract: Synthesis and Properties of 3‐Alkoxy(hydroxy)thiazolidin‐2,4‐diones.
Authors: GEFFKEN D.
Published: May 2016

The alkoxythiazolidinones (IV) are prepared either from the esters (I) or from the acids (V) by reaction with carbonyldiimidazole (II) and the alkoxyamines (III).
ChemInform Abstract: Synthesis and Spectroscopic Studies of 1,1′‐(1,8‐Naphthylene)‐di‐1H‐1,2,3‐triazoles.
Authors: NAGAWA Y. , HONDA K. , NAKANISHI H.
Published: May 2016

The first 1,8‐diheteroaromatic naphthalenes (III), (V)‐(VII) and (IX) are prepared by 1,3‐dipolar cycloadditions of the azides (I) or (VIII) to the corresponding acetylenic esters (II) or (IV).
ChemInform Abstract: Substituent and Coordination Effects in Singlet Reactions of 3‐Diazo3H‐1,2,4‐triazoles with Substituted Benzenes and Nitro Compounds.
Authors: GLINKA J. , FISCUS D. , RAO C. B. , SHECHTER H.
Published: May 2016

The diazotriazoles (I) are photolytically or thermochemically converted to the carbenes (II) which are coupled with the substituted benzenes (III), yielding mixtures of the isomeric compounds (IV) ‐ (VI).
ChemInform Abstract: Condensation of 2‐Phenyl‐2‐oxazolin‐5‐one with o‐Hydroxyacetophenone Imines.
Authors: TRIPATHY P. K. , MUKERJEE A. K.
Published: May 2016

Hippuric acid (II) is converted into 2‐phenyl‐2‐oxazolin‐5‐one which undergoes base‐catalyzed cyclization with the N‐substituted O‐hydroxyacetophenone imines (I), producing the 3‐N‐benzoylamino‐4‐amino‐4‐methyl‐3,4‐dihydrocoumarins (III).
ChemInform Abstract: Highly Stereoselective Synthesis of Optically Active Masked syn‐α,β‐Dihydroxy Aldehydes.
Authors: ANNUNZIATA R. , CINQUINI M. , COZZI F. , RAIMONDI L. , STEFANELLI S.
Published: May 2016

The (thio)acetals (I) of cinnamaldehyde are osmylated selectively in the presence of dihydroquinidine acetate to yield 1,2‐diols which are characterized in the form of the acetonides (II).
ChemInform Abstract: Synthesis of New 3‐(Pyridin‐6‐yl)pyrazolo(1,5‐a)pyrimidines.
Authors: IBRAHIM N. S. , MOHAMED M. H. , ELNAGDI M. H.
Published: May 2016

Coupling of the nitriles (I) and (II) results in rearrangement, elimination, and cyclization, forming the pyridines (III).
ChemInform Abstract: Preparation and Reactions of (Z)‐3‐Arylidene‐6‐arylmethyl‐2,5‐piperazinediones Having Highly Oxygenated Benzene Rings.
Authors: KUBO A. , SAITO N. , YAMATO H. , KAWAKAMI Y.
Published: May 2016

The benzaldehyde (I) reacts with the piperazinedione (II) to produce the benzylidene derivative (III) which is hydrogenated and then acetylated, yielding (V).
ChemInform Abstract: Redox Reactions with Cyclopeptide‐Like Quinoline Derivatives as Lipophilic NAD Model Compounds.
Authors: BOHNERT S. , GUENDEL W.‐H. +
Published: May 2016

The 14‐membered cyclopeptide analogues (II) are obtained as single diastereomers by dimerization of quinoline derivatives (I).
ChemInform Abstract: Nickel‐Catalyzed Transformations of 2,1‐Benzisoxazoles with Organozinc Reagents.
Authors: BAUM J. S. , CONDON M. E. , SHOOK D. A.
Published: May 2016

Benzisoxazole (I) reacts with the organolithium compounds (II) in the presence of a nickel catalyst to give the aminobenzaldehydes (III).
ChemInform Abstract: Local Conformer Effects in Unsaturated Lactones.
Authors: VEDEJS E. , DENT W. H. III , GAPINSKI D. M. , MCCLURE C. K.
Published: May 2016

Osmylation of the (E)‐ and (Z)‐lactones (I) and (VII) gives the diols (III) or (VIII) as main products, which are identified via their correlation compounds (VI) or (V).
ChemInform Abstract: Novel Reactions of Carbon Suboxide. Part 7. Synthesis of Heterocyclic Rings by Reaction with Bifunctional Aliphatic Compounds.
Authors: BONSIGNORE L. , CABIDDU S. , LOY G. , SECCI D.
Published: May 2016

Cyclization of the hydroxy oximes (I), (IV), and (VI) with carbon suboxide (II) gives the unsaturated lactones (III), (V), and (VII).
ChemInform Abstract: The Dimerization of Substituted 3‐TMSO‐1‐alkynes with (Ph3P)3RhCl.
Authors: RUEPING T. + , SINGER H.
Published: May 2016

The silyloxy alkynes (III), prepared according to literature methods as shown in the scheme, dimerize with the title catalyst (obtained in situ from triphenylphosphine and the chloro‐bis(cyclooctadiene)rhodium‐dimer) to give the trans‐vinylacetylenes (IV).
ChemInform Abstract: Addition Reaction of 1,1,1‐Trichloroalkanes to Vinyltrimethylsilane in the Presence of Systems Based on Fe(CO)5.
Authors: KAMYSHOVA A. A. , DOSTOVALOVA V. I. , CHUKOVSKAYA E. TS.
Published: May 2016

In the presence of a nucleophile such as triphenylphosphine, iron pentacarbonyl catalyzes the addition reaction of the trichlorosilanes (I) to vinyltrimethylsilane, producing the chloroalkylsilanes (III).
ChemInform Abstract: Reaction of Phenylboronic Anhydride with Hexamethylcyclotrisilazane.
Authors: GRUZINOVA E. A. , SVATIKOV M. YU. , KOTRELEV G. V. , ZHDANOV A. A.
Published: May 2016

The reaction mentioned in the title, which is carried out in a basic medium at high temperature, yields mainly the phenylborazine (III).
ChemInform Abstract: Chemistry of Phosphorus. Part 180. 1,2‐Di‐tert‐butyldiphosphane Monoxide and 1,2‐Di‐tert‐butyldiphosphane Dioxide.
Authors: BAUDLER M. , HEUMUELLER H. +
Published: May 2016

The title compounds (II) and (III) are prepared by reacting the diphosphane (I) with cumene hydroperoxide or pure oxygen as shown.
ChemInform Abstract: Synthesis of 10‐Selenatricyclo(3.3.3.03,7)undec‐3(7)‐ene. X‐Ray Structure of an Alkene Containing a Pyramidalized Double Bond.
Authors: HROVAT D. A. , MIYAKE F. , TRAMMELL G. , GILBERT K. E. , MITCHELL J. , CLARDY J. , BORDEN W. T.
Published: May 2016

The title compound (VII) is synthesized as shown starting from the diol (I) and isolated as a solid which is stable at room temperature.
ChemInform Abstract: The Synthesis and Nuclear Magnetic Resonance Investigation of the Structure and Chemical Dynamics of New Anionic Tetraallyl Complexes of Lanthanoid Ions.
Authors: BRUNELLI M. , POGGIO S. , PEDRETTI U. , LUGLI G.
Published: May 2016

The complexes (IV) are prepared as shown in the scheme and are isolated as mono‐dioxane solvates in 50‐90% yield.
ChemInform Abstract: Polymeric Dioxouranium(VI) Complexes with Acyldihydrazones.
Authors: LAL R. A. , DAS S. , THAPA R. K.
Published: May 2016

The polymeric dioxo‐U(VI) 2:1‐complexes (I) are synthesized by 1:1 molar reaction of uranyl acetate dihydrate with corresponding diacylhydrazone ligands in aqueous ethanolic medium.
ChemInform Abstract: Interaction Between Non‐Conjugated Chromophores. Part 27. Synthesis and Formation of Ironcarbonyl Complexes of 3′,3′‐Dimethyl‐2,3,5,6‐tetramethylidenespiro(bicyclo(2.2.1)heptane‐7,2′‐oxirane). Single‐Crystal and Molecular Structure of syn,exo2,3‐anti,endo5,6‐trans‐μ‐((1R,2R,3S,4S,5S,6R)‐C,2,3,C‐η:C,5,6,C‐.# eta.‐(3′,3′‐Dimethyl‐2,3,5,6‐tetramethylidenespiro(bicyclo(2.2.1)heptane‐7,2′‐oxirane)))bis(tricarbonyliron).
Authors: RUBELLO A. , VOGEL P. , CHAPUIS G.
Published: May 2016

The starting compound (III) for the preparation of the complexes is prepared via (I) which is derived in four steps from 6,6‐dimethylfulvene and maleic anhydride.
ChemInform Abstract: Conductomeric Investigations on Solvatochromic Nickel(II) Complexes in Dichloroethane and N,N‐Dimethylformamide.
Authors: LINERT W.
Published: May 2016

Conductivity measurements are performed on solutions of the mixed ligand complexes (I) in dichloroethane and DMF.
ChemInform Abstract: Synthesis and Studies of Some Bivalent Transition Metal Complexes with Acylhydrazones.
Authors: NARANG K. K. , SINGH M. K.
Published: May 2016

In refluxing ethanol, the equimolar reaction of corresponding bivalent transition metal salts with the finely powdered acylhydrazones derived from 3‐hydroxy‐2‐naphthaldehyde and benzoyl or salicyloyl hydrazine leads to complexes of the type (I), which are highly insoluble in common organic solvents.
ChemInform Abstract: The Influence of the 5′‐Nucleotide on the Binding of (PtCl(dien))Cl to the Dinucleotides d(HpG), as Studied by Competition Experiments.
Authors: VAN DER VEER J. L. , NOTEBORN H. P. J. M. , VAN DEN ELST H. , REEDIJK J.
Published: May 2016

The binding of the monofunctional title complex (I) to the dinucleotides d(CpG), d(TpG) and d(ApG) is studied separately and in competition experiments.
ChemInform Abstract: Telomerization of Isoprene with Phthalimide by Complex Palladium Catalysts.
Authors: ZAKHARKIN M. I. , GUSEVA V. V. , SULAIMANKULOVA D. D. , PETRUSHKINA E. A.
Published: May 2016

Telomerization of phthalimide (I) with isoprene (II) in the presence of palladium complex affords a mixture of two isomeric N‐dimethyloctadienylphthalimides.
ChemInform Abstract: Isodidemnine‐1, a Cytotoxic Cyclodepsipeptide Isolated from the Tunicate Trididemnum cyanophorum (Didemnidae).
Authors: GUYOT M. , DAVOUST D. , MOREL E.
Published: May 2016

Isodidemnin‐1 is shown to be the major and the most cytotoxic product (against L 1210 leukemia cells) in the dichloromethane extract of the title species.
ChemInform Abstract: Synthesis of Substituted 2,6‐Dioxabicyclo(3.1.1)heptanes: 1,3‐Anhydro‐ 2,4‐di‐O‐benzyl‐ and 1,3‐Anhydro‐2,4‐di‐O‐(p‐bromobenzyl)‐β‐D‐rhamnopyranose.
Authors: FANG Y. , KONG F. , WANG Q.
Published: May 2016

The D‐mannopyranoside (I) is tosylated, reduced and then etherified to give the deoxy compounds (IV).
ChemInform Abstract: Novel Synthesis of Hex‐2‐enopyranosides.
Authors: GURJAR M. K. , DHAR T. G. M.
Published: May 2016

The glucal (I) is coupled with the thiopyridone (II) under the influence of boron trifluoride to yield the thiopyranoside (III) which reacts with the alcohols (IV) and NBS, producing the pyranosides (V).
ChemInform Abstract: Synthesis of α‐Methylene‐γ‐lactones in Furanosidic Systems.
Authors: RAUTER A. P. , FIGUEIREDO J. A. , ISMAEL I. , PAIS M. S. , GONZALEZ A. G. , DIAZ J. , BARRERA J. B.
Published: May 2016

Oxidation of the alcohols (I) and (IX) with PCC on molecular sieves yields the corresponding ketones (II) and (X).
ChemInform Abstract: An Asymmetric Synthesis of (‐)‐Steganone. Further Application of Chiral Biaryl Syntheses.
Authors: MEYERS A. I. , FLISAK J. R. , AITKEN R. A.
Published: May 2016

Coupling of the oxazoline (+)‐(VI) with the compound (VII), which is readily available from piperonal, and subsequent work‐up yields a seperable diastereomeric mixture of the oxazolines (IX).
ChemInform Abstract: Physical and Chemical Nature of Films Formed on Si(100) Surfaces Subjected to C2H4 at Elevated Temperatures.
Authors: KIM H. J. , DAVIS R. F. , COX X. B. , LINTON R. W.
Published: May 2016

The heteroepitaxial growth of monocrystalline β‐SiC films on single‐crystal Si wafers is facilitated by the initial and separate chemical conversion of the Si(100) surface via reaction with C2H4 (H2 carrier gas, 0.1 M Pa, at elevated temp.).
ChemInform Abstract: Corrosion‐Resistant Amorphous Metallic Films of Mo49Cr33B18 Alloy
Authors: RAMESHAM R. , DISTEFANO S. , FITZGERALD D. , THAKOOR A. P. , KHANNA S. K.
Published: May 2016

have been sputtered on glass and quartz substrates and the amorphous state of the as‐deposited films is confirmed by XRD.
ChemInform Abstract: Preparation of MxTa6‐xS (M: V, Cr; x ≅ 1). A New Columnar Structure with Interpenetrating Metal Icosahedra.
Authors: HARBRECHT B. , FRANZEN H. F.
Published: May 2016

Single crystals of the title compounds are obtained by high temp. reaction of Ta2S with equimolar amounts of V and Cr, resp. (1720 K).
ChemInform Abstract: Na5Mn3F14: A New Variant of Chiolite Structure?
Authors: WANDNER K.‐H. , HOPPE R.
Published: May 2016

Single crystals of the title compound have been prepared by thermal decomposition of Na2MnF6 (Au‐tube, argon atmosphere, 640 °C, 7 d).
ChemInform Abstract: Identification of the Main Sulfur Nitrogen Compounds in Sulfur Ammonia Solutions
Authors: PRESTEL H. , SCHINDEWOLF U.
Published: May 2016

is achieved by comparison of the UV‐VIS absorption spectra of a solution of sulfur in ammonia and of synthesized sulfur nitrogen compounds in ammonia.
ChemInform Abstract: An in situ Infrared Study of the Oxidation of Sulfur Dioxide on Platinum Electrodes
Authors: KORZENIEWSKI C. , MCKENNA W. , PONS S.
Published: May 2016

using substractively normalized interfacial Fourier transform IR spectroscopy (SNIFTIRS) has been performed with emphasis on the oxidation processes occurring at potentials in the double layer region and where Pt oxide is formed.
ChemInform Abstract: Thermal Behavior of Caesiumchloroferrates(III) and Caesiumchloroferrate(III) Hydrates. Part 2. The Rehydration of Decomposition Products of Cs3(FeCl6). A Raman Spectroscopic Study Under Definite Atmosphere of Water Vapor.
Authors: WITKE K. , SCHLEINITZ K.‐D. , FEIST M. , HASS D. , LORENZ M.
Published: May 2016

Rehydration of Cs3(FeCl6) (I) obtained by dehydration of Cs3(FeCl6)·H2O (II) at about 160 °C, does not occur in the air within 3‐4 h, whereas (II) is formed during this time under the vapor pressure of the eliminated water.
ChemInform Abstract: Preparation and Electrochemical Characterization of WSe2 Electrodes Having a Wide Range of Doping Densities.
Authors: KOVAL C. A. , OLSON J. B.
Published: May 2016

n‐ and p‐Type WSe2 crystal electrodes with doping levels in the range 5·1015‐3·1019cm‐3 have been prepared by chemical vapor transport of polycrystalline WSe2 in the presence of the doping metal, Re for n‐type and Nb for p‐type, using SeCl4 (n‐type) and I2 (p‐type) as the transportation agent.
ChemInform Abstract: The Electrochemical Oxidation of Zinc Studied By Ellipsometry.
Authors: HAMNETT A. , MORTIMER R. J.
Published: May 2016

Ellipsometry is combined with cyclic voltammetry to investigate the anodic oxidation of Zn (important for various reprographic processes) in neutral solutions of LiClO4.
ChemInform Abstract: Electroreduction of Carbon Dioxide to Carbon Monoxide in Molten LiCl + KCl, LiF + KF + NaF, Li2CO3 + Na2CO3 + K2CO3 and AlCl3 + NaCl.
Authors: HALMANN M. , ZUCKERMAN K.
Published: May 2016

The results obtained for the reduction of CO2 to CO in molten carbonate mixtures and eutectic alkali metal halides using different electrode materials show that at higher temp. (∼ 800 °C) Faradaic efficiencies of more than 100% can be obtained, indicating that the reaction outlined in the scheme is not the only one involved in the production of CO.
ChemInform Abstract: Efficient High Rate Carbon Dioxide Reduction to Methane and Ethylene at in situ Electrodeposited Copper Electrode.
Authors: COOK R. L. , MACDUFF R. C. , SAMMELLS A. F.
Published: May 2016

In situ Cu deposition on a glassy carbon electrode during CO2 reduction is performed by electrolysis in a two‐compartment cell (anolyte‐catholyte separation by a Nafion membrane) using a 0.5 M KHCO3 catholyte containing 5·10‐4 M CuSO4.
ChemInform Abstract: The Reaction of CF4, CBrF3 and CBr2F2 with Silica
Authors: VOGT H. , FISCHER A. , GROSSER G. , RIESEL L.
Published: May 2016

has been investigated in the temp. range 500‐1300 K by IR spectroscopy and GC‐MS.
ChemInform Abstract: The Chromium(IV) Oxide‐Hydrogen Reaction
Authors: HILL W. D. JUN.
Published: May 2016

yields a green, non‐ferromagnetic product which is insoluble in water, mineral acids and NaOH.
ChemInform Abstract: Phosphonium Salts with Hydrogen Dihalide Anions HCl‐ 2, HBr‐ 2, HI‐ 2, or HBrCl‐.
Authors: KOHLE R. , KUCHEN W. , PETERS W.
Published: May 2016

Phosphonium hydrogen dihalides (R3PR') (HX2) (X: Cl, Br, or I and, e.g. R=R': Ph), (R3PR') (ClHBr), and (R3PH) (HBr2) are prepared by reaction of the corresponding phosphonium halides or tertiary phosphanes with HX in nearly quantitative yield.
ChemInform Abstract: Crystal Structures and Properties of (Au(phen)((CN)0.92Br0.08)2)Br and (Au(phen)(CN)((CN)0.82Br0.18))·0.5trans‐(Au(CN)2Br2)·0.5Br·ph# en (phen: 1,10‐phenanthroline) Obtained by Disproportionation of Five‐Coordinate Bromodicyano(1,10‐phenanthroline)gold(III). Two Examples of Secondary Coordination and CN/Br Disorder in Square‐Planar Gold(III) Complexes.
Authors: MARANGONI G. , PITTERI B. , BERTOLASI V. , FERRETTI V. , GILLI G.
Published: May 2016

The disproportionation of the neutral five‐coordinate complex (I) yields a conducting solution from which the two charged species (II) and (III) are separated and characterized by single‐crystal X‐ray analysis ((II): space group Fmm2, Z=4; (III): P1, Z=2).
ChemInform Abstract: An Electrochemical Study on the Oxidation of Tris(N,N‐dimethyldithiocarbamato)ruthenium(III).
Authors: MONTREE A. , SCHMITZ J. E. J. , VAN DER LINDEN J. G. M. , STEGGERDA J. J. , PIGNOLET L. H. , BOWMAN J. , WHEELER S. H.
Published: May 2016

From cyclic voltammetric measurements at different scan rates, concentrations, and temperatures it is seen that the electrochemical oxidation of the title complex in acetone or methylene chloride is a one‐electron process followed by a dimerization to yield (I).
ChemInform Abstract: Catalytic Method for the Synthesis of Sulfides Starting from 1,3‐Dienes and Elemental Sulfur.
Authors: DZHEMILEV U. M. , BAIBULATOVA N. Z. , TKACHENKO T. K. , KUNAKOVA R. V.
Published: May 2016

The reaction between butadiene (I) and sulfur affords the disulfides (II) and (III), if the catalytic system is activated by CO2 and NH3.
ChemInform Abstract: Stereoselectivity in Intramolecular Diels‐Alder Reaction. Part 2. Influence of Alkyl Substituents on the Cyclization of Azatrienes.
Authors: GUY A. , LEMAIRE M. , GRAILLOT Y. , NEGRE M. , GUETTE J. P.
Published: May 2016

1,4‐Butene‐2‐diol (I) is converted into the oxazolidone (III) which is subsequently transformed into the silyl ethers (V).
ChemInform Abstract: Beckmann Rearrangement of 9,10‐Phenanthrenequinone Monoxime by Toluenesulfonyl Chloride in the Presence of Bases.
Authors: MYSYK D. D.
Published: May 2016

The rearrangement of the title compound (I) by TosCl in the presence of a near to stoichiometric amount of pyridine affords the product (II) instead of the target compound (III), which would be the product of a "second type" Beckmann rearrangement.
ChemInform Abstract: Photosensitized Oxidation of Model Unsaturated Lipid Systems: (4Z,7Z)‐Undeca‐4,7‐diene and (4Z)‐Undec‐4‐en‐7‐yne.
Authors: CARLESS H. A. J. , BATTEN R. J.
Published: May 2016

Photooxidation of the diene (I) according to A) furnishes an inseparable mixture of the hydroperoxides (IV) and (V).
ChemInform Abstract: Systematic Design of Chemical Oscillators. Part 40. Oxidation of Thiourea by Aqueous Bromine: Autocatalysis by Bromide.
Authors: SIMOYI R. H. , EPSTEIN I. R.
Published: May 2016

Under conditions of oscillation, acidic mixtures of bromate and thiourea in a continuously stirred tank reactor, the following three reactions are expected to be most significant: a) reaction of bromate with thiourea to give Br‐, b) the reaction of bromate with the Br‐ generated to yield Br2, c) the reaction of Br2 with thiourea to regenerate Br‐.
ChemInform Abstract: Structure‐Reactivity Relationships in Copper(II)/Copper(I) Electron‐Transfer Kinetics: Evaluation of Self‐Exchange Rate Constants for Copper‐Polythia Ether Complexes.
Authors: MARTIN M. J. , ENDICOTT J. F. , OCHRYMOWYCZ L. A. , RORABACHER D. B.
Published: May 2016

Kinetic parameters for electron‐transfer cross‐reactions of Cu(II)/Cu(I) complexes of the macrocyclic and open‐chain ligands (I)‐(IV) are reported.
ChemInform Abstract: The Reaction of the Phenyl‐Copper‐Magnesium Reagent, Prepared from 2 PhMgBr and CuI, with Some Organic Halides.
Authors: RAHMAN M. T. , NAHAR S. K.
Published: May 2016

The phenyl‐copper‐magnesium reagent, prepared in situ from phenylmagnesium bromide (I) and copper iodide (II), reacts with the organic halides (III) to give the substituted benzenes (IV), biphenyl (V), and iodobenzene (VI).
ChemInform Abstract: A New Efficient Method for the Generation of F‐Alkyl Ketone Metal Enolates by Using Copper(II) Bromide ‐ Lithium Aluminum Hydride Reagent and Their Aldol Reaction with Carbonyl Compounds.
Authors: KUROBOSHI M. , OKADA Y. , ISHIHARA T. , ANDO T.
Published: May 2016

The fluorinated ketones (I) react with sodium diethyl phosphite (II) to give the enol phosphates (III).
ChemInform Abstract: The Stereospecific Formation of an Exocyclic Alkene by a Consecutive Radical Cyclization‐Elimination.
Authors: HARRIS F. L. , WEILER L.
Published: May 2016

The propiolic ester (V), prepared from the bromopropanol (I) as outlined in the reaction scheme, is submitted to an addition reaction with the tributylstannyl complex (VI), yielding the olefinic compound (VII) which is further transformed into the iodoalkylvinylstannane (VIII).
ChemInform Abstract: Antimycobacterial β‐Amino Ketones.
Authors: MEINDL W. , BOEHM M. +
Published: May 2016

The N‐methyl‐N‐benzylaminoalkyl aryl ketones (IV) are prepared by Mannich reaction of the alkyl aryl ketones (I) with the N‐methylbenzylamines (III).
ChemInform Abstract: Gas‐Solid Chlorination of 4‐Phenylthiazole‐2(1H)‐thione.
Authors: NALINI V. , DESIRAJU G. R.
Published: May 2016

Crystals of the thiazolethione (I) are kept in a moist chlorine atmosphere to produce the disulfide (II) by gas‐solid reaction.
ChemInform Abstract: A Versatile Vinyl Sulfide Synthesis Using Benzenesulfenyl Chloride.
Authors: BARTELS B. , HUNTER R. , SIMON C. D. , TOMLINSON G. D.
Published: May 2016

The thioacetals (I) react with phenylsulfenyl chloride (II) to give the α‐chloro sulfides (III) which are dehydrochlorinated to yield the vinyl sulfides (IV).
ChemInform Abstract: Synthesis of α‐Phenylsulfonylcyclopentanones by Intramolecular Carbenoid Cyclization of α‐Diazo‐β‐ketophenyl Sulfones.
Authors: MONTEIRO H. J.
Published: May 2016

The 2‐diazo‐β‐keto sulfones (I) undergo cyclization after rhodium diacetate‐induced release of nitrogen to produce the 2‐phenylsulfonylcyclopentanones (II).
ChemInform Abstract: Addition of a Methylene Group Across the Ester Carbonyl Function.
Authors: VERARDO G. , STRAZZOLINI P. , GIUMANINI A. G.
Published: May 2016

Phenyl trifluoroacetate (I) reacts with diazomethane (II), yielding the oxirane (III) which is hydrolyzed to give the keto alcohol (VI) and its dimer (VII).
ChemInform Abstract: Spirodienones. Part 6. Spiro‐γ‐lactones from 1‐Benzyltetrahydro‐1‐naphthoic Acids and from a 1‐Benzyltetrahydroisoquinoline‐1‐carboxylic Acid.
Authors: COUTTS I. G. C. , HADFIELD J. A. , HUDDLESTON P. R.
Published: May 2016

The title lactones (III) and (VIII) are obtained from (II), (V) or (VII) by controlled potential anodic oxidation; reaction with NBS, or treatment with thallium trifluoroacetate.
ChemInform Abstract: Preparation and Dienophilicity of 3‐Methyl‐4,5‐benzofurandione.
Authors: LEE J. , TANG J. , SNYDER J. K.
Published: May 2016

p‐Benzoquinone (I) is coupled with the enamine (II) to form the dihydrobenzofuran (III) which is hydrolyzed and oxidized to give the fused o‐quinone (V).
ChemInform Abstract: Pyrrole Studies. Part 35. Aerial Oxidation of 4‐Substituted 3‐Amino‐2,5‐dimethylpyrroles. An X‐Ray Crystallographic and Spectroscopic Study of the Oxidation Products.
Authors: CIRRINCIONE G. , DATTOLO G. , ALMERICO A. M. , AIELLO E. , JONES R. A. , DAWES H. M. , HURSTHOUSE M. B.
Published: May 2016

Reaction of the nitrile (II) with the carbonyl compounds (III) according to A) yields the hydroxy pyrroles (IV) instead of the expected pyrroles (I).
ChemInform Abstract: Ring Expansion of 4‐Benzoyl‐β‐lactams.
Authors: ALCAIDE B. , DOMINGUEZ G. , MARTIN‐DOMENECH A. , PLUMET J. , MONGE A. , PEREZ‐GARCIA V.
Published: May 2016

The benzoyltriaryl‐β‐lactam (I) reacts with the alkyl halides (II) in the presence of sodium hydride to give the alkoxypyrrolinones (III) and the 3‐alkylazetidinones (IVa) and (IVb).
ChemInform Abstract: A Route to Optically Active Trisubstituted Pyrrolidines Using Claisen Rearrangements of Azalactones.
Authors: COOPER J. , KNIGHT D. W. , GALLAGHER P. T.
Published: May 2016

N‐Ethoxycarbonyl‐β‐alanine (I) reacts with butyllithium and the allylic chloride (II) to give the substituted urethane (IIIa) which is O‐ deproctected and lactonized, yielding compound (IV).
ChemInform Abstract: Synthesis of 4‐Acylindoles via 2‐(2‐Phenylsulfinylvinyl)pyrrole.
Authors: MUCHOWSKI J. M. , SCHELLER M. E.
Published: May 2016

Pyrrole (I) is converted to the N‐(silyl)phenylsulfinylethenylpyrrole (IX) as shown in the reaction scheme.
ChemInform Abstract: Flash Vacuum Thermolysis of Oxazolidines: A New Way to Reactive Azomethine Ylides. Regio‐ and Stereospecific Synthesis of Substituted Pyrrolidines.
Authors: JOUCLA M. , MORTIER J.
Published: May 2016

The amino acid esters (I) react with formaldehyde (II) to give the oxazolidines (III).
ChemInform Abstract: Cycloaddition of 1‐Methyl‐1‐azaazulen‐2(1H)‐one with Reactive Acetylenes.
Authors: ABE N. , TAKEHIRO T.
Published: May 2016

Cycloaddition of the azaazulenone (I) with the activated acetylenes (II) in acetonitrile gives mixtures of the azulenes (III), the isoquinolinones (IV), the pyrroloazulenes (V) and (VI), and the vinylazaazulenones (VII).
ChemInform Abstract: Structure Determination of Isomeric 1,2‐Oxathiolane 2‐Oxides. Products of the Addition of Sulfur Dioxide to Phenylcyclopropanes.
Authors: BONDARENKO O. B. , VOEVODSKAYA T. I. , SAGINOVA L. G. , TAFEENKO V. A. , SHABAROV YU. S.
Published: May 2016

The reaction between cis‐1,2‐diphenylcyclopropane (Ia) and SO2 (II) may yield four stereoisomers.
ChemInform Abstract: Synthesis of 2‐Phenylthiazolidine Derivatives as Cardiotonic Agents. Part 3. Optically Active Isomers of N‐Methyl‐2‐(2‐(2‐(4‐phenylpiperazino)ethoxy)phenyl)thiazolidine‐3‐carboxamides.
Authors: NATE H. , SEKINE Y. , ODA K. , AOE K. , NAKAI H. , WADA H. , TAKEDA M. , KOTERA K. , YABANA H. , NAGAO T.
Published: May 2016

The racemate (I) is coupled with the optically active pyrrolidinecarboxylic chloride (L)‐(II), producing the diastereomers (III), together with the aldehyde (IV).
ChemInform Abstract: 1,2,4‐Trisubstituted 1,2,3‐Triazolium Salts from Nitrilimines and Isocyanides.
Authors: MODERHACK D. , LORKA M.
Published: May 2016

The N‐arylbenzohydrazonoyl chlorides (I) are dehydrochlorinated with triethylamine to give the diaryl nitrilimines (II) which undergo cycloaddition with the alkylisocyanides (III) to form the 1‐alkyltriazolium salts (IV).
ChemInform Abstract: Preparation of Dihydrothiopyran‐3‐ones by Aldol Condensation of Diketo Sulfides and Acid‐Catalyzed Rearrangement of Ketol Intermediates Leading to Thiolan‐3‐one Derivatives.
Authors: NAKAYAMA J. , HIDAKA K. , HOSHINO M.
Published: May 2016

The diketo sulfides (I) cyclize in an intramolecular aldol reaction in the presence of acids to yield a mixture of the isomeric thiopyranones (III) and (IV) via the hydroxythiopyranones (II).
ChemInform Abstract: Reaction of Pyridine 1‐Oxides with Phosgene.
Authors: GRABARNIK M. S. , ORLOV S. I. , CHIMISHKYAN A. L.
Published: May 2016

The reaction between the pyridine 1‐oxides (I) and phosgene (II) is studied for the first time.
ChemInform Abstract: Pyridine Derivatives from 3‐Chloro‐2‐propeniminium Salts and Enamines.
Authors: BRINKER B. , HEBER D.
Published: May 2016

The chloropropeniminium salts (I) react with an excess of the enamines (II) to produce the dihydropyridine derivatives (III).
ChemInform Abstract: A Facile and Alternative Synthesis of the Quinoline Nucleus Using Thermal Cyclization of 2‐Azahexatriene System Generated from 2‐(Alkenyl)acylaniline with POCl3.
Authors: HIBINO S. , SUGINO E.
Published: May 2016

Wittig reaction of the o‐nitrobenzaldehydes (I) with the alkyltriphenylphosphonium salts (II) gives the nitrostyrenes (III) which are reduced to form the o‐vinylanilines (IV).
ChemInform Abstract: A Convenient Access to Furo(3,2‐h)quinolines and to Furo(3,2‐b)pyridines via SRN1 Reactions.
Authors: BEUGELMANS R. , BOIS‐CHOUSSY M.
Published: May 2016

Photochemical reaction of the isopropoxyiodoquinolines (I) with the ketones (II) yields the oxoalkylisopropoxyquinolines (III).
ChemInform Abstract: 2,4‐Cyclohexadien‐1‐ones in Organic Synthesis. Further Studies of Molecular Rearrangements Occurring from Products of Intramolecular AzideOlefin Cycloadditions.
Authors: SCHULTZ A. G. , STAIB R. R. , ENG K. K.
Published: May 2016

Thermolysis of the azidopropylcyclohexadienones (I) produces the triazolines (II).
ChemInform Abstract: Alkylation of Aromatic Hydrocarbons with 1‐Fluoromethyl‐o(m)‐carboranes Under the Action of AlCl3.
Authors: LEBEDEV V. N. , BALAGUROVA E. V. , ZAKHARKIN L. I.
Published: May 2016

The fluoromethylcarboranes (I) and (V) react with benzene (II) under Friedel‐Crafts conditions to give the benzylcarboranes (III) and (VI).
ChemInform Abstract: Remarkable Differences in the Reactivities of the (E)‐ and (Z)‐Isomers of a Phosphaalkene.
Authors: BARRON A. R. , COWLEY A. H. , HALL S. W.
Published: May 2016

On treatment with iron enneacarbonyl both isomers of the phosphaalkene (I) produce the phosphaalkyne (II).
ChemInform Abstract: On the Interaction between Hypophosphorous Acid and Alcohols.
Authors: DEVEDJIEV I. , GANEV V. , STEFANOVA R. , BORISOV G.
Published: May 2016

Hypophosphorous acid (II) reacts with the alcohols (I) to yield the phosphonous acids (IV), together with the expected hypophosphorous acid esters (III).
ChemInform Abstract: Improved Syntheses of Tetraphenylphosphonium Bromide and 1‐Phenyldibenzophosphole.
Authors: AFFANDI S. , GREEN R. L. , HSIEH B. T. , HOLT M. S. , NELSON J. H. , ALYEA E. C.
Published: May 2016

Phosphorus trichloride (I) reacts with the phenylmagnesium bromides (II) to form the triarylphosphines (IIIb) ‐ (IIId).
ChemInform Abstract: Allyl Substituted Bisphosphines. Synthesis and Reactivity.
Authors: ISSLEIB K. , KUEHNE U. + , THORAUSCH P.
Published: May 2016

Metalation of trimethylenebisphosphine (I) with potassium in liquid ammonia produces the intermediates (II) or (III) which react with allyl chloride (IV) to give a mixture of 1,3‐bis(allylphosphino)propane (V) and 1,2‐diallyl‐1,2‐diphospholane (VI).
ChemInform Abstract: Methylindium Dialkylamido Compounds: Mono‐ and Bis‐Dialkylamides Involving Four‐ and Five‐coordinated Indium(III). X‐Ray Crystal Structures of Cyclic (Me2In(N(CH2)2N(Me)CH2CH2))2, Cyclic MeIn(MeNC(CH)4N)2, and MeIn((MeN(CH2)2NMe)InMe2)2.
Authors: ARIF A. M. , BRADLEY D. C. , DAWES H. , FRIGO D. M. , HURSTHOUSE M. B. , HUSSAIN B.
Published: May 2016

The four‐coordinated, amido‐bridged Ir(III) dimers (III) are prepared by 1:1 molar reaction of InMe2Cl (I) with the Li amides (II).
ChemInform Abstract: Syntheses and Properties of Complexes of a Conjugated Macrocyclic Hexamine with Lanthanoid Nitrates.
Authors: GRAY C. J. , HART F. A.
Published: May 2016

2,6‐Diformylpyridine (IV), prepared as shown, yields in a template reaction with o‐phenylenediamine and barium ions the complex (VI) which gives the title complexes (VIII) by ligand‐transfer reactions.
ChemInform Abstract: Dichloro(2,2,2‐trichloroethoxy)vanadium(III)dietherate: Synthesis and Coordination Chemistry.
Authors: CHADHA S. L. , SHARMA V.
Published: May 2016

Lithium 2,2,2‐trichloroethoxide reacts anhydrous VCl3 in Et2O (reflux, 24 h) to give the title complex (Ia).
ChemInform Abstract: Synthesis, Characterization, and Aquation Kinetics of (N‐(o‐Carboxyphenyl)iminodiacetato)(glycinato)chromate(III) Complex Ion in Acidic Media.
Authors: CHATTERJEE C. , PHADKE S. V.
Published: May 2016

The rates of aquation of the title complex (I) in aqueous perchloric acid are reported as a function of acid concentration and temperature.
ChemInform Abstract: The Coordination of Small Molecules by Manganese(II) Phosphine Complexes. Part 9. The Reaction of Ethylene with (MnX2L) (X: Cl, Br, or I; L: PnPr3, PnBu3, PPhMe2, PPhEt2, or PPh3) in Tetrahydrofuran Solution.
Authors: GOTT G. A. , MCAULIFFE C. A.
Published: May 2016

In the title reaction the complexes with X: Cl; L: PPr3, PBu3, PPhMe2 or PPhEt2 and X: ‐Br; L: PBu3 are found to react with ethylene in a 1:1 ratio, whereas the other complexes are found to be inactive towards ethylene.
ChemInform Abstract: Synthesis, Properties and Structure of Bis(dialkyldithiophosphinato)manganese(II) Complexes.
Authors: DENGER C. , KECK H. , KUCHEN W. , MATHOW J. , WUNDERLICH H.
Published: May 2016

The 1:2 molar reaction of Mn2(CO)10 (I) with the bis(thiophosphoryl)disulfanes (II) gives the tetrahedral dimeric title complexes (III).
ChemInform Abstract: Complexes of Technetium(V) Bidentate Schiff Bases Derived from S‐Methyldithiocarbazate.
Authors: DU PREETZ J. G. H. , GERBER T. I. A. , KNOESEN O.
Published: May 2016

The bidentate Schiff bases (II) exist in solution as an equilibrium mixture with their tautomeric thiole form, which reacts as a singly charged bidentate ligand to yield (III).
ChemInform Abstract: Reactions of Small Molecules with Re2Cl4(PEt3)4. Part 2. Products Resulting from the Reaction with Dihydrogen.
Authors: BUCKNOR S. , COTTON F. A. , FALVELLO L. R. , REID A. D. JUN. , SCHMULBACH C. D.
Published: May 2016

Treatment of the title compound (I) with H2 under pressure of 120 atm at 60 °C leads to reproducible formation of the three products (II) as the major product, (III), and (IV) (a known compound), separable by chromatography on silica gel.
ChemInform Abstract: Technetium and Rhenium Monothio‐β‐diketonate Complexes and X‐Ray Structure of Tris(monothiodibenzoylmethanato)technetium(III).
Authors: BANDOLI G. , MAZZI U. , SPIES H. , MUENZE R. + , LUDWIG E. , UHLEMANN E. , SCHELLER D.
Published: May 2016

The six‐coordinated tris(monothio‐β‐diketonato)‐Tc and ‐Re complexes (I)‐(III) are synthesized by reaction of hexakis(thiourea)‐Tc(III) or ‐Re(III) trichloride with the appropriate ligands in refluxing methanol.
ChemInform Abstract: Synthesis of Heterometallic Carbide Clusters Containing Three Iron Atoms: (PPN)2(MFe3(CO)13C) (M: Cr, W), (PPN)2(Cr2Fe3(CO)16C), Rh2Fe3(CO)14C, and (PPN) (Rh3Fe3(CO)15C).
Authors: HRILJAC J. A. , HOLT E. M. , SHRIVER D. F.
Published: May 2016

Redox‐condensation reactions involving the ketenylidene cluster (I) and various electrophilic transition‐metal reagents lead to the title complexes (III), (V), (VII), (IX), and (X).
ChemInform Abstract: Acid‐Induced Aquation of (Trifluoromethyl)cobaloximes with Aromatic Nitrogenous Axial Ligands.
Authors: BROWN K. L. , YANG T.‐F.
Published: May 2016

The synthesis of the title complexes by standard alkylation procedures is not possible.
ChemInform Abstract: The Synthesis, Crystal and Molecular Structure of a Copper(I) Complex of 2(1H)‐Pyridinethione: An Intermediate in Cu4S4 Heterocubane Build Up.
Authors: CONSTABLE E. C. , RAITHBY P. R.
Published: May 2016

The reaction of ethanolic solutions of CuCl2 with different equivalents of 2(1H)‐pyridinethione leads, besides a number of products, to the isolation of the binuclear complexes (I) and (II) (no yields given).
ChemInform Abstract: Mono‐, Di‐, and Trinuclear Copper(II) Complexes Containing Pyrazole and Glycylglycine or Diethylenetriamine. Comparisons with Imidazole Containing Copper(II) Complexes.
Authors: MORI W. , SAKURAI T. , NAKAHARA A. , NAKAO Y.
Published: May 2016

The mixed ligand Cu(II) complexes (I)‐(III) with pyrazole and glycylglycine are prepared from Cu(II) hydroxide in neutral or basic (addition of Ca(OH)2 or KOH) solution.
ChemInform Abstract: Palladium‐Catalyzed Anellation of Aryl Iodides with Diphenylacetylene.
Authors: WU G. , RHEINGOLD A. L. , GEIB S. J. , HECK R. F.
Published: May 2016

The cyclopalladated benzylamine (I) or the benzalimine (IV) react with the acetylenes (II) or (V) to give the naphthalene (III) or the isoquinoline (VI).
ChemInform Abstract: Synthesis, Reactivity, and X‐Ray Crystal Structures of (Os6Pt2H2(CO)16(μ‐C8H10)(C8H12))·CH2Cl2 and (Os6H(CO)16(μ‐C8H11)). Model Compounds for C‐H Activation.
Authors: COUTURE C. , FARRAR D. H.
Published: May 2016

The reaction of the two complexes (I) and (II) results in the formation of the mixed metal complex (III).
ChemInform Abstract: Proton Site Exchange in (μ‐H)3M3(CO)9(μ3‐CH) (M: Ru, Os)
Authors: VANDER VELDE D. G. , HOLMGREN J. S. , SHAPLEY J. R.
Published: May 2016

(study of CH and μ‐H proton site exchange by means of variable‐temp.
ChemInform Abstract: Polynuclear Metal Complexes with Bridging Carbene or Carbyne Ligands. Part 63. Synthesis of Eight‐Membered‐Ring Metallacycles: X‐Ray Crystal Structures of (Pt4W4(μ‐CR)(μ3‐CR)3(μ‐CO)(CO)7(η‐C5H5)4)·CH2Cl2, (Ni2Pt2W4(μ‐CR)(μ3‐CR)3(μ‐CO)(CO)7(η‐C5H5)4)·CH2Cl2 (R: C6H4Me‐4), and (Ni2Pt2W4(μ3‐CPh)4(CO)8(η‐C5H5)4).
Authors: ELLIOTT G. P. , HOWARD J. A. K. , MISE T. , NUNN C. M. , STONE F. G. A.
Published: May 2016

The eight‐membered metallacycles (Ia)‐(Id) containing three triply bridging alkylidyne groups and one triply bridging CO ligand are prepared from the heptanuclear Pt3W4 cluster (II) and Pt(cod)2 or Ni(cod)2 (III) (molar ratio 1:1), and from the trinuclear PtW2 cluster (IV) and an excess of Ni(cod)2 (IIIb) according to the scheme.
ChemInform Abstract: Polynuclear Metal Complexes with Bridging Carbene or Carbyne Ligands. Part 66. Carbaboranetungsten‐Platinum Complexes. Polyhedral Rearrangements of a 12‐Vertex Cage System; Crystal Structures of (PtW(CO)2(PEt3)2(η6‐C2B9H8(CH2C6H4Me‐4)Me2))·CH2Cl2, (PtW(μ‐H)(.mu±sigma.:η5‐C2B9H7(CH2C6H4‐Me‐4)Me2)(CO)2(PMe3)(PEt3)2), and Related Compounds.
Authors: ATTFIELD M. J. , HOWARD J. A. K. , DE M. JELFS A. N. , NUNN C. M. , STONE F. G. A.
Published: May 2016

The p‐tolylmethylidyne‐carborane‐W salt (Ia) and the Pt(II) complex (II) yield the dimetal compound (III), the structure of which is determined by X‐ray analysis (space group P21/c, Z=4).
ChemInform Abstract: Synthesis of Monoamine Platinum(II) Complexes and Crystal Structure of Potassium Trichloro(isopropylamine)platinate(II) Hemihydrate.
Authors: ROCHON F. D. , MELANSON R. , DOYON M.
Published: May 2016

The monoamine‐Pt(II) complexes (III) are prepared from the iodo‐bridged dimer (I) according to the scheme.
ChemInform Abstract: 2‐(4‐Arylazophenylamino)‐1,4‐diaminoanthraquinones.
Authors: KAZANKOV M. V. , GINODMAN L. G.
Published: May 2016

The disulfimido ethers (I) of 1,4‐diaminoanthraquinone or its derivatives react with the p‐arylazoanilines (II) to give the hitherto unknown title compounds (III).
ChemInform Abstract: Participation of Ambident Neighboring Groups in Hypobromous Acid Addition to Some Steroidal Olefins. Competition of Electronic and Stereoelectronic Effects.
Authors: KOCOVSKY P. , STIEBOROVA I.
Published: May 2016

In the reactions of the steroidal olefins (I)‐(III) with HOBr (generated in situ from N‐bromoacetamide + HClO4), the participation propensity of ambident neighboring groups containing a carbonyl moiety is studied.
ChemInform Abstract: 5‐Thiopyranoses. Part 12. Sulfur Participation in Displacement Reactions of Sulfonate Esters of 5‐Thio‐D‐allose, 5‐Thio‐D‐altrose, and 5‐Thio‐D‐glucose Derivatives.
Authors: AL‐MASOUDI N. A. L. , HUGHES N. A.
Published: May 2016

Both sulfonate groups of the anhydro‐thioalloside (Ia) undergo displacement reactions leading to derivatives (Ib) and (Ic).
ChemInform Abstract: Chain Extensions from C‐1 and C‐5 of D‐Xylopyranose Derivatives.
Authors: BLATTNER R. , FERRIER R. J. , RENNER R.
Published: May 2016

The brominated D‐xylopyranose (I) reacts with acrylonitrile (IIa) or methyl acrylate (IIb) in the presence of tributyltin hydride and under the influence of room light to produce the adducts (III) and (IV) via a radicalic process.
ChemInform Abstract: Total Synthesis of Heptacyclic Aspidosperma Alkaloids. Part 1. Preliminary Experiments.
Authors: BLOWERS J. W. , BRENNAN J. P. , SAXTON J. E.
Published: May 2016

In order to get access to the Aspidosperma framework, a series of model experiments is carried out.
ChemInform Abstract: Asymmetric Conjugate Addition to Unsaturated Chiral Amido Alcohols Using Grignard Reagents Coordinated with Tertiary Amines or DBU. Preparation of Optically Active 3‐Substituted Carboxylic Acids and (S)‐(‐)‐Citronellol.
Authors: SOAI K. , MACHIDA H. , YOKOTA N.
Published: May 2016

The optically active carboxylic acids (V) are prepared by diastereoselective conjugate addition of the Grignard reagents (IV) coordinated with DBU to the chiral amido alcohols (III) derived from the (S)‐proline derivative (I).
ChemInform Abstract: Synthesis of Benzocarbacephem and Benzocarbapenem Derivatives by Copper‐Promoted Intramolecular Aromatic Substitution.
Authors: JOYEAU R. , YADAV L. D. S. , WAKSELMAN M.
Published: May 2016

The azetidinones (Ia)‐(Ic) are prepared by condensation of respective malonate anions and (III).
ChemInform Abstract: Synthetic beta‐Lactam Antibiotics. Part 1. Synthesis and Antibacterial Activity of 7‐Amino‐3‐(1‐(halo‐substituted phenyl)‐1H‐tetrazole‐5‐yl)thiomethyl‐3‐cephem‐4‐carboxylic Acids.
Authors: KOH D. , PARK S.‐W. , KIM Y.
Published: May 2016

The syntheses of the mercaptotetrazoles (III) and the cephalothin analogues (VII) are reported.
ChemInform Abstract: The Stereochemistry of Some Reactions at C‐16 in Gibberellins: An X‐Ray Crystallographic Study of the Methyl Esters of Gibberellin A2 and Gibberellin A9 Hydrochloride.
Authors: ABOUAMER K. M. , HANSON J. R. , HITCHCOCK P. B.
Published: May 2016

It is shown by spectroscopic studies that hydration of the C‐16 double bond of gibberellins leads to (16R)‐alcohols such as (I).
ChemInform Abstract: Open Tube Zn Diffusion Using In/Zn Sources and Its Application in Quasi‐Planar InP/InGaAsP HBT′s
Authors: LI W. , PAN H.
Published: May 2016

(heterojunction bipolar transistors).
Modifications to the azide method for nitrate isotope analysis
Authors: Tu Ying , Fang Yunting , Liu Dongwei , Pan Yuepeng
Published: May 2016

Rationale

The azide method for measuring the stable isotope ratios of nitrate (NO3−) is easy to set up. However, the method requires spongy cadmium (Cd) or activated Cd powder which are not easy to prepare, and a toxic azide buffer is used. We aimed to use Cd powder directly to simplify preparation and to substantially reduce the azide dose.

Methods

The reaction conditions were optimized in order to maximize the NO3− reduction yield. The original azide buffer was diluted by 10‐ to 10000‐fold with or without addition of sodium acetate to reduce O‐exchange between nitrite (NO2−) and H2O. The isotope ratios of the produced nitrous oxide (N2O), used to examine the overall reaction performance, were measured using a purge and cryogenic trap system coupled to an isotope ratio mass spectrometer.

Results

It was found that Cd powder could be directly used to reduce NO3− to NO2−. A 100‐fold diluted azide buffer could be used to reduce NO2− to N2O when only the δ15N value was measured, and the diluted azide buffer with sodium acetate when both δ15N and δ18O values were measured. Using the modified method, the standard deviations of the δ15N and δ18O measurements of international NO3− standards were 0.1 to 1.0‰ and often better than 0.3‰ (3 replicates).

Conclusions

Compared with the original azide method, the techniques described here can reduce preparation time by using Cd powder without activation in the first reaction step and substantially (by >60‐fold) reduce the dose of extremely toxic reagents containing azide by incorporating sodium acetate in the second reaction step. Our modified method is suitable for samples with small volume (5 mL), being different from previous methods in which 50 or 70 mL samples were used. Copyright © 2016 John Wiley & Sons, Ltd.