bluuebunny/crossref_metadata_2025 huggingface dataset:
Poly‐(2,5‐furanylene Vinylene) Prepared from a Precursor Polymer Soluble in organic Solvents
Authors: Dierick T. , De Schrijver D. , Eevers W. , Geise H. J.
Published: September 2010

Poly‐(2,5‐furanylene vinylene), (PFV) is prepared by thermal treatment of films cast from THF or CHCl3 solutions of a methoxy precursor polymer. The sequence of reactions is described starting from 2,5‐dimethylfuran. The new methoxy precursor is characterised by its IR and 13C‐NMR spectra, while GPC (polystyrene calibration) gives MD = 4300, MW = 11800, degree of polymerisation, n = 35, degree of polydispersion, dp = 2.8.

UV spectra suggest isolated furan units, in accordance with the proposed structure. Some premature elimination is also observed. Maximum conductivity p = 20 Ω−1 cm−1 is reached after doping the PFV film for 4 min in iodine vapour.
Unique 1′‐O‐boc protection of Virginiamycin S and Resulting Resistance Against Sodium Hydroxide
Authors: Moerman Marc C. , Anteunis Marc J.O.
Published: September 2010

The picolinic hydroxyl in Virginiamycin S1 (VS1; 1a) can be protected with di‐tert‐butyloxycarbonate affording the tert‐butyloxycarbonyl derivative thus yielding VS1 −1′ ‐O‐Boc (1b) in a fast and quantitative conversion without concomitant betaine (1c) formation. Once protected however, the lactone bond in 1b can no longer be cleaved under mild alkaline conditions. A possible explanation is given.
Synthesis of Pyrylium Salts with Various Anions
Authors: Dinculescu A. , Balaban T. S. , Popescu Cristina , Toader D. , Balaban A. T.
Published: September 2010

Four methods are described for obtaining pyrylium salts with various anions which influence strongly their solubility, their reactivity and ease of purification; (i) direct synthesis; (ii) conversion of a pyrylium salt into its pseudobase (1,5‐enedione) which is recyclised with the acid corresponding to the desired anion; (iii) anion metathesis and (iv) reductive stripping of the anion with sodium borohydride in carboxylic acid media which also provides a carboxylate anion. Method (iv) is new and is complementary to the direct metathesis (iii) because it allows the replacement of anions stemming from strong acids which confer insolubility to pyrylium salts with anions derived from much weaker acids and which give more soluble salts. The present paper also describes some new pyrylium salts obtained by all methods (i‐iv). One may mention among these 2,4,6‐trimethylpyrylium hydrogen isobutenedisulfonate which results directly from sulfuric acid, acetic anhydride and isobutene or t‐butanol at temperatures below 30°C.
Synthesis and Spectrokinetic Properties of Photochromic Spiropyrans
Authors: Samat A. , De Keukeleire D. , Guglielmetti R.
Published: September 2010

The synthesis and spectrokinetic properties of photochromic spiropyrans in solution are reported. The most important results obtained during the last two decades, including the synthetic access to azaheterocyclic and non‐azaheterocyclic spiropyrans are described, as each series confers its own particularities to the photocoloration. The influence of the structure (skeleton, heteroatoms, substituents) on the stability of the photomerocyanines is discussed in terms of electronic (correlation of Hammett type) and steric effects. The role of structural parameters and of solvent effects on the electronic distribution of the colored form is also emphasized.
Study of Higher Order Electrochemical Reactions Involving an Insoluble Product with Several Chronopotentiometric Techniques
Authors: Molina A. , López‐Tenés M. , Serna C. , Albaladejo J.
Published: September 2010

The general theory for higher order electrochemical reactions involving an insoluble product at the DME, by using different chronopotentiometric techniques, is presented. The expressions corresponding to a null blank period, to an expanding plane electrode and to spherical and plane stationary electrodes, can be deduced as particular cases of the equations obtained in this work. The particular features of the potential‐time curves are discussed and methods for determining kinetic parameters and the conditional (formal) potential are proposed.
Heptacoordination in Diorganotin Pyridine‐2,6‐Dicarboxylates in DMSO Solution
Authors: Gielen Marcel , Acheddad Mohamed , Bouâlam Mohamed , Biesemans Monique , Willem Rudolph
Published: September 2010

The 1H NMR spectra in the pyridine proton region of six 2,6‐pyridinedicarboxylato‐(phenyl) (organo)tin(IV) compounds in DMSO‐d6 solutions exhibit a pattern that, together with 13C coupling data and 119Sn chemical shifts, can be interpreted by a heptacoordinated pentagonal bipyramidal structure in which the tin atom is likely to be surrounded by two DMSO ligands in equatorial positions.
Quaternary Salts of 1,2‐Bisazolyl‐ and 1,2‐Bisbenzazolylethanes
Authors: Torres Jesús , Lavandera José Luís , Cabildo P. , Claramunt R. M. , Elguero José
Published: September 2010

Eleven new heterocyclic mono‐and diquaternary salts have been prepared by reaction of 1,2‐bisazolyl‐ and 1,2‐bisbenzazolyl‐ethanes with methyl sulfate or methyl fluorosulfonate. Their structure has been established by means of 1H and 13C NMR spectroscopy. Homonuclear COSY and NOESY experiments and 2D‐heteronuclear correlations have been performed when necessary to assign all NMR signals.
Functionalized Chloroenamines in Aminocyclopropane Synthesis ‐ VII. A Diastereocomplementary Approach to Amino‐Bicyclo[n.1.0]Alkanenitriles on the Basis of Chlorinated Enamines
Authors: Vilsmaier Elmar , Stamm Thomas , Dauth Werner , Tetzlaff Claus , Barth Stefan
Published: September 2010

Reductive dechlorination of amino‐chlorobicycloalkanenitriles 5a‐c was achieved by sodium in tert.butyl alkohol/THF to give the bicyclic nitriles 6a‐c. LiAIH4 as dechlorination reagent caused a ring opening reaction with 5b,c producing diamines 7b,c. The bicyclic chloro compounds 5b,c could by obtained from enamines 1 via dichloroenamines 4. Monochlorination of 1b,c and subsequent cyclopropanation with cyanide yielded endo‐bicycloalkanenitriles 3b.c. Compounds 3 and 6 thus generally can be synthesized in a diastereocomplementary way starting from enamines 1.
Industrial Implications of the Thermal Behaviour of Pseudoboehmite
Authors: Decleer Jos G. M.
Published: September 2010

Pseudoboehmite powder is widely used as a precursor material for the manufacturing of shaped catalyst carriers. After processing, it provides unique properties as high surface area, porosity and strength. The conversion of pseudoboehmite to gamma alumina is determined to a large extent by the manufacturing route of the powder. Physical properties like particle size and shape, crystallinity, porosity, etc. have a distinct influence on the thermal behaviour. This thermal and physical characterization has allowed to translate basic powder properties into the industrial practice of catalyst carrier manufacturing. Unit operations as mix‐mulling, extrusion, drying and calcination are clearly affected by powder characteristics.
Influence of the Incorporation of 1‐(2,3‐Dideoxy‐β‐D‐Erythro‐Hexopyranosyl)‐Thymine on the Enzymatic Stability and Base‐Pairing Properties of Oligodeoxynucleotides
Authors: Augustyns Koen , van Aerschot Arthur , Urbanke Claus , Herdewijn Piet
Published: September 2010

1‐ (2,3‐dideoxy‐β‐D‐erythro‐hexopyranosyl) thymine was used at several positions as nucleoside substitute in the synthesis of oligonucleotides using the H‐phosphonate chemistry. A 13‐mer with one hexose nucleoside substitution at each end had equivalent hybridization properties as compared to the non‐modified 13‐mer. However, addition of a second analogue at each end or modification in the middle of a 13‐mer caused a sharp decrease in melting temperature. Substitution at the 3′‐end with two nucleoside analogues was necessary to withstand the action of snake venom phosphodiesterase.
Ft‐Ir Study of the Interaction Between 1‐Dimethylamino‐2‐Propanone and Phenols
Authors: Parmentier J. , Zeegers‐Huyskens TH.
Published: September 2010

The hydrogen bonds between 1‐dimethylamino‐2‐propanone and phenols are investigated by FT‐IR spectroscopy. The thermodynamic parameters are determined in carbontetra‐chloride and in 1,2‐dichloroethane. The infrared spectra show that the oxygen and nitrogen atoms are involved in hydrogen bond formation. The occupation of the two sites depends on the solvent and the difference is discussed in terms of different conformational equilibria.
Mecanisme De Decarbonylation De Pyrazolides Ionises Par Impact Electronique
Authors: Flammang Robert , Abdelouahab Fouad Bachir Ben , Munkengeshayi Kadiebwe , Boulanger Pierre
Published: September 2010

Electron impact ionization of 1‐acryloylpyrazole [1] induces a unimolecular loss of CO forming ionized 1‐vinylpyrazole [2] as shown by metastable ion characteristics and neutralization‐reionization data. This CO loss implies a rate‐determining isomerization process into a pyrazolylmethyl ketene structure 1a+. These ketene ions have been synthetized in the ion source by dissociative ionization of pyrazolylpropionylpyrazoles. Flash‐vacuum pyrolysis of these compounds also affords the expected neutral ketenes in the gas phase, which are however readily converted into the acryloyl isomers by an intramolecular nucleophilic process.
Structure Du Principal Saponoside De Alternanthera sessilis
Authors: Penders André , Kapundu Mpuza , Delaude Clément
Published: September 2010

Saponin from leaves of Alternanthera sessilis (L.) DC. contains a major component which has been isolated as a peracetylated and methylated derivative. Its structure has been established by NMR spectroscopy and shown to be: 3β‐O‐(β‐D‐glucopyranosyluronic acid). 28‐O‐β‐D‐glucopyranosyl oleanolic acid. Two dimensional NMR spectral data were used.
A Facile Method for the α‐Monochlorination of Aldimines and Aldehydes
Authors: De Kimpe Norbert , Coppens Wim , Krauze Aivars , De Corte Bart , Stevens Christian , Welch John
Published: September 2010

Aldimines were selectively α‐monochlorinated without any interference of α,α‐dichlorinated derivatives, by a sequence of reactions involving α‐trimethylsilylation of preformed 1‐azaenolates, α‐chlorination using N‐chlorosuccinimide and desilylation in methanol. Upon acidic hydrolysis, these α‐monochloroimines provide an easy access to α‐monochloroaldehydes.
Diethyl‐ and Di‐n‐Butyltin(IV) 3‐Amino‐4‐Methylbenzoates: Synthesis, Spectroscopic Characterization and in Vitro Antitumor Activity
Authors: Gielen Marcel , Khloufi Abdelaziz El , Biesemans Monique , Mahieu Bernard , Willem Rudolph
Published: September 2010

Diethyl‐ and di‐n‐butyltin(IV) oxides react with 3‐amino‐4‐methylbenzoic acid in a 1:2 (a) and 1:1 (b) molar ratio to yield dialkyltin compounds of the types R2Sn[O2C‐C6H3‐3‐NH2‐4‐CH3]2 (a) and {[R2Sn(O2C‐C6H3‐3‐NH2‐4‐CH3)]2O}2 (b). The compounds obtained were characterized by 1H, 13C, 119Sn NMR and by Mössbauer spectroscopy. Compound 1a was tested in vitro against two human tumor cell lines, MCF‐7, a mammary tumor, and WiDr, a colon carcinoma.
Synthesis of Some Benzofuro Benzopyrones
Authors: Joshi S. C. , Trivedi K. N.
Published: September 2010

7‐Hydroxy‐3‐phenyl‐[4H]‐1‐benzopyran‐4‐one 1a was condensed with 2‐bromocyclohexanone to yield the corresponding ether 2a which on alkaline hydrolysis gave tetrahydrodibenzofuran derivative 3a the pyran ring being opened up during this reaction. Compound 3a was dehydrogenated with DDQ and the benzopyrone ring was constructed on dibenzofuran nucleus with sodium and ethyl formate to provide 3‐phenyl‐[4H]‐benzofuro (3,2‐g)‐1‐benzopyran‐4‐one 5a. Compound 5a was also synthesized by first converting 3a into corresponding [4H]‐1‐benzopyran‐4‐one 6a and then subjecting it to dehydrogenation. A similar series of reactions were employed for 7‐hydroxy‐8‐methyl‐3‐phenyl‐[4H]‐1‐benzopyran‐4‐one 1b and 7‐hydroxy‐2‐methyl‐3‐phenyl‐[4H]‐1‐benzopyran‐4‐one 1c to obtain 2‐hydroxy‐1‐methyl‐3‐phenylacetyl dibenzofuran 4b and 2‐methyl‐3‐phenyl‐[4H]‐benzofuro (3,2‐g)‐1‐benzopyran‐4‐one 5c respectively.
Structure De L'Acide Zanhagenique, Triterpenoide Nouveau Isole De Zanha Africana
Authors: Kapundu Mpuza , Warin Roger , Delaude Clément
Published: September 2010

The root's bark saponin of Zanha africana yields on hydrolysis medicagenic acid, zanhic acid and a novel triterpene, for which we propose the name: zanhagenic acid. The structure of this acid determinated using spectral means including 2D NMR is: 2β, 3β, 16 α‐trihydroxyolean, 13 (18)‐ene, 23, 28‐dioic.
Etude Conformationnelle De 2,3,5,6,7,8‐Hexahydro‐4H‐Benzopyranne‐4‐Ones, A L'Aide De La Mecanique Moleculaire
Authors: Dolmazon R. , Albrand M. , Pollet P.
Published: September 2010

The conformational study of 2,3,5,6,7,8‐hexahydro‐4H‐benzopyran‐4‐ones, using molecular mechanics, shows that the more stable conformations contain a half‐chair cyclohexenic ring and a half‐chair strongly distorted toward a sofa form for the dihydropyran‐4‐one ring. The interconversion barrier of 3,4‐dihydro‐2H‐pyran‐4‐one is lower than that for cyclohexene (5 versus 6.1 Kcal/mol). This work is ratified by reasonable correlation between experimental data and empirical force‐field calculations.
Reaction De Diverses 2‐Arylidene‐Benzofuran‐3‐Ones Avec La Diphenylnitrilimine. Une Nouvelle Synthese D'Ortho‐Hydroxybenzoylpyrazoles
Authors: M'Sadek Moncef , Rammah Mohamed , Schmitt Gérard , Vebrel Joël
Published: September 2010

A new synthesis of ortho‐hydroxybenzoylpyrazoles in one step from 2‐arylidene‐benzofuran‐3‐ones, via cycloaddition route and a adduct rearrangement, is recorded.
Regiochimie De La Cycloaddition Des 2‐Azadienes Disilyles Avec Les Derives De La 1,4‐Naphtoquinone
Authors: Bouammali B. , Pautet F. , Fillion H.
Published: September 2010

The regiochemistry of the Diels‐Alder reaction between disilylated 2‐aza‐1,3‐butadienes and substituted naphthoquinones is investigated.
Application of Biochemical Methods in Enantioselective Synthesis of Bioactive Natural Products
Authors: Mori Kenji
Published: September 2010

Enzymes as well as yeasts were used in enantioselective syntheses of bioregulators such as hormones and semiochemicals. Lipases and esterases were employed in achieving optical resolution, conversion of meso‐compounds to optically active compounds, and macrolactonization. Lactase effected glucosidation of a phenolic hydroxy ketone without any protection of the functional groups. Yeasts provided a variety of optically active hydroxy esters and ketones, which served as versatile non‐racemic chiral building blocks.
Acyclic Diastereoselective Synthesis Using Functionalized Thiazoles. Routes to Carbohydrates and Related Natural Products
Authors: Dondoni Alessandro
Published: September 2010

New synthetic routes to chiral polyhydroxylated aldehydes from lower terms employing 2‐substituted thiazoles as homologating reagents are described. In all cases the thiazole ring serves as a convenient formyl group equivalent.
Chemoselectivity Reversals in Quinoxalines: The Reaction of 5‐Chloro‐6‐Nitroquinoxaline with Nucleophiles
Authors: Nasielski J. , Moucheron C. , Nasielski‐Hinkens R.
Published: September 2010

5‐Chloro‐6‐nitroquinoxaline 2, made in six steps from 2,3‐dichloronitro‐benzene, reacts 1) with piperidine to give 6‐nitro‐5‐piperidinoquinoxaline as the only product; 2) with methoxide to give a 95:5 ratio of 5‐methoxy‐6‐nitro‐ and 5‐chloro‐6‐methoxy‐quinoxaline; 3) with p‐thiocresolate to give the disubstitution product without showing any monosubstitution product.
Recent Advances in Pyridazine Chemistry
Authors: Heinisch Gottfried
Published: September 2010

Efficient syntheses of a variety of so far not accessible, monosubstituted or vicinally disubstituted 1,2‐diazine derivatives are presented. The versatility of these compounds for syntheses of various polyaza bicyclic and tricyclic systems is demonstrated. In addition, a series of surprising reactivities observed (including ring contraction, dismutation, tele‐substitution, intramolecular SN‐reactions etc.) are discussed.
Environmental Effects on the Fluorescence of the Reaction Products of 2,3‐Diphenylquinolizinium Bromide and Amines
Authors: Martin M. A. , Menéndez J. C. , Lerner D. A. , Del Castillo B.
Published: September 2010

1‐Piperidino‐4‐(4′,5′‐diphenyl‐2′‐pyridyl)‐1,3‐butadiene 2 (Figure 1) has been synthesized from 2,3‐diphenylquinolizinium bromide 1 and piperidine. The influence of solvent properties and pH on the absorption and fluorescence spectra was studied.
The Structure and Solid State Conformation of (E)‐(9R,10R)‐9, 10‐Epoxy‐17β‐Hydroxy 4A‐Oxa‐A‐Homo‐5,10:8,9‐Disecoandrost‐3‐Ene‐5,8‐Dione Acetate
Authors: Tinant B. , Declercq J. P. , Bondarenko‐Gheorghiu L. , Pavlovic V. , Lorenc L. , Mihailovic M. Lj.
Published: September 2010

The molecular structure of the title compound, a 15‐membered 9,10‐epoxy‐3‐en‐4‐ol lactone, which is an important intermediate in the reaction sequence correlating steroid compounds with prostaglandin‐like derivatives, was determined by X‐ray analysis. The (E) stereochemistry around the double bond and the trans‐(9R,10R)‐configuration at the oxirane ring are established.
Spectres De Masse FAB En Mode Positif De Composes Moleculaires Oxygenes Du Baryum
Authors: Aubagnac Jean‐Louis , Cot Louis , Hovnanian Nadine , Miele Philippe
Published: September 2010

FAB mass spectra of condensation products of barium with oxygenated compounds allow to obtain analytical information about the structure of these compounds.
Synthese De Quelques Spiro[Indoline‐Naphtoxazines] Et Spiro[Indoline‐Pyridobenzoxazines] Photochromiques. Application De La Methodologie De La Recherche Experimentale
Authors: Pottier E. , Sergent M. , Luu R. Phan Tan , Guglielmetti R.
Published: September 2010

Some spiro[indoline‐naphthoxazines] I and spiro[indoline‐pyridobenzoxazines] II substituted by different groups were synthesized in order to evaluate their photochromic properties1 and to optimize the preparation of spiroheterocyclic systems. In addition, some spiro[indoline‐naphthopyrans] III were also prepared as reference compounds. Their physical and spectroscopic characteristics (UV, 1H and 13C NMR) were determined. A study using the experimental design methodology allowed to point out the most important factors for improving the reaction yields.
Syntheses De Nouveaux Acides Tetrathiafulvalenecarboxyliques Et De Leurs Esters Methyliques
Authors: Mora Henri , Fabre Jean‐Marc , Giral Louis , Montginoul Claude
Published: September 2010

Different methylated tetrathiafulvalenecarboxylic acids are synthesized by a two or three steps procedure. The methylated tetrathiafulvalene species is lithiated using an equimolar amount of n‐BuLi at −80°C. The lithiated compound is then either carbonated producing new acids 2 to 4, or treated with methylchloroformiate. The monoesters 9, 11 and 13 obtained are easily characterized by mass spectroscopy and then converted into acids 2 to 4 by saponification. New diesters 10 and 12 are also synthetized and characterized.
Etude Par Photolyse‐Eclair De La Photodegradation Sensibilisee De Spiro (Indoline‐Pyranes) Et De Spiro (Indoline‐Oxazines) Photochromiques
Authors: Eloy Dominique , Escaffre Pascale , Gautron René , Jardon Pierre
Published: September 2010

The photodegradation and the “colorability” of photochromic spiro (indoline‐pyrans) and spiro (indoline‐oxazines) have been made by repeated flashes in solution open to the air. The photosensitization proceeds by triplet‐triplet energy transfert. For hight ratios photosensitizer/photochrome. (»100), the quenching by oxygen has no influence on the “colorability” which like that is optimized. The sensitized photodegradation is very important with a lifetime Vo about 3‐5 flashes whereas for the spirooxazines unsensitized Vo exceeds several thousands. This study enhances the hypothesis describing the photodegradation process of these molecules mainly via the triplet state.
Novel Syntheses of Heterocycles with N‐(1‐Haloalkyl)Azinium Halides. Part 6. Preparation of 2,3,4,5,10,11‐Hexahydro‐1H‐Dibenzo[b,e][1,4]Diazepin‐1‐Ones
Authors: Vanden Eynde J.‐J. , Mayence A. , Maquestiau A. , Anders E.
Published: September 2010

Conversion of aldehydes into N‐(1‐chloroalkyl) pyridinium chlorides (by means of pyridine and thionyl chloride) and further reaction with 3‐(2‐aminophenyl)amino‐5,5‐dimethyl‐2‐cyclohexenone provide a novel and efficient route to the title compounds.
Synthesis of 1,2,4‐Triazolo[4,3‐d][1,2,4]Triazepines By 1,3‐Dipolar Cycloaddition
Authors: El Messaoudi M. , Hasnaoui A. , El Mouhtadi M. , Lavergne J.‐P.
Published: September 2010

The reaction of N‐aryl‐C‐ethoxycarbonyl nitrilimines with [1,2,4]triazepin‐3,5‐dithione leads to title compounds. The 1,3‐dipolar cycloaddition is completely peri and regioselective. The preferred orientation of addition is predicted correctly by AM1 calculation.
Synthese De Nouveaux Systemes Heterocycliques: Les Pyrazolo[1,5,4‐Ef]Triazolo[3,4‐a][1,5]Benzodiazepines
Authors: Benchidmi M. , Essassi E. M. , Ibnmansour A.
Published: September 2010

The synthesis of new pyrazolo [1,5,4‐ef] triazolo [3,4‐a] [1,5] benzodiazepines have been described. Hydrazinolysis of pyrazolobenzodiazepinethiones leads to 7‐pyrazolylamino indazole.
Disproportionation Kinetics of N‐Chloromethylamine and N‐Chloroethylamine
Authors: Antelo J. M. , Arce F. , Parajó M. , Rodríguez P.
Published: September 2010

The kinetics of disproportionation of N‐Cl‐methylamine and N‐Cl‐ethylamine in water were studied at acid pH. Its disproportionation and protonation constants and the coefficients of absorption of N,N‐dichloramines are calculated and the mechanism of its disproportionation is discussed.
Studies in Acetalization Reactions of Some Terpenes
Authors: Anaç Olcay , Talinli Naclye
Published: September 2010

The reactions of some terpenic ketones/aldehydes with alcohols were investigated in acidic medium. Some expected and unexpected products have been identified and possible mechanistic pathways leading to the products are discussed.
Rôle de Divers Paramètres sur La Cinétique de Croissance de Particules de Silice Par Hydrolyse Ammoniacale de Si(OC2H5)4
Authors: El Rhess Essaïd , El Bakali Idriss , Mercier René
Published: September 2010

Four independent parameters: solvent (ROH, R = CH3, C2H5, C3H7, n‐C4H9); NH3 and H2O concentrations and temperature have been varied and consequently the final diameter of silica particles determined. The bigger the solvent, the larger the particles (210 nm : CH3OH‐550 nm : butanol). Increasing H2O and NH3 contents lead to an increase of the diameter. Following both the particle size (MET) and the weight evolution of silica as time enables to prove that Ostwald ripening does not occur, since the number of particles does not decrease during the growing. Measurements at 20, 30, 40°C give an Arrhenius law relating the speed rate and the temperature, the activation energy being 3.5 Kcal/mole. Raising temperature increases the kinetics as well as the nuclei generation, so that smaller homodisperse particles can be obtained (ø ∼ 120 nm at 20°C to 70 nm at 40°C in C2H5OH).
Effects of Sulfidation and Synergism in Hydrodechlorination of o‐Dichlorobenzene Over NiMo/Alumina Catalyst
Authors: Novák Michal , Zdražil Miroslav
Published: September 2010

Hydrodechlorination of o‐dichlorobenzene was studied in the gas phase at 300°C and 2 MPa over reduced and sulfided Nl, Mo and NiMo catalysts supported on alumina. The work was related to disposal of chlorinated organic wastes containing sulfur impurities. The effect of sulfidation on activity of Ni, Mo and NiMo catalysts was different: the ratio of the activities of the sulfided and unsulfided forms was 0.3, 1.7 and 2.2, respectively. Positive synergism in activity between Ni and Mo was observed with sulfided NiMo catalyst, the NiMo sample being three times more active than the sum of activities of Ni and Mo samples. Reduced catalysts did not exhibit synergism. Chlorobenzene was observed as an intermediate over all catalysts. The selectivity to the intermediate was decreased by presulfidation of the catalyst; for instance the maximum conversion to chlorobenzene at 300°C was 40 and 17% for non–sulfided and sulfided catalyst, respectively. The selectivity to intermediate over sulfided NiMo catalyst increased with decreasing temperature from 300 to 250°C and was not influenced by decrease of pressure from 2 to 1 MPa.
Synthesis and Reactivity of Tricarbonyl(4‐Methoxy‐1‐Methylpentadienyl)Iron(+1) Cation
Authors: Donaldson William A. , Jin Myung‐Jong
Published: September 2010

The title cation 2, prepared by protonation of (5‐methoxy‐3,5‐hexadien‐2‐ol)Fe(CO)3, reacts regio‐ and stereospecifically with allyl‐TMS, CH3OH, and Ph3P.
Conductance Studies of Silver(I) Salts in Water‐Pyridine Mixtures
Authors: Kalidas C. , Rajendran G.
Published: September 2010

The conductance behaviour of silver(I) perchlorate and bromate has been studied in water‐pyridine mixtures over the complete range of solvent compositions at 30°C. The sharp decrease of Walden product of silver ion up to 40 wt% pyridine has been ascribed to selective solvation by pyridine while a similar decrease in the initial stages of addition of water (starting from pure pyridine region) to an infinitely dilute solution of anions in pyridine was explained in terms of selective hydration of anions.
Étude Infrarouge du Pyridoxal Isonicotinoyle Hydrazone Et de Composes Analogues
Authors: Colonna C. , Cossé‐Barbi A. , Massat A. , Ben Abdelmoumene R. , Doucet J. P.
Published: September 2010

Infrared spectra have been obtained for pyridoxal isonicotinoyl hydrazone, pyridoxal benzoyl hydrazone, salicylaldehyde isonicotinoyl hydrazone and salicylaldehyde benzoyl hydrazone. Vibrational assignments are proposed mainly in the 2000‐1200 cm−1 region. Evidence is given that a intramolecular bond exists between the phenolic hydroxyl and the nitrogen of imine group. Trans amide III band located near 1550 cm−1 presents a drastic shift from usual results (more than 50 cm−1). Conformational equilibrium is discussed with AM1 and ab‐initio methods. IR and NMR (NOE measurements) studies show that one conformation seems to be predominant.
Réactivité Photochimique En Solution de 1,5‐Diazodiazepine‐2‐Ones
Authors: Achour Redouane , Essassi El Mokhtar , Zniber Rachid , Desvergne Jean‐Pierre , Bouas‐Laurent Henri
Published: September 2010

A study of the photoreactivity of eight 1,5‐benzodiazepine‐2‐one derivatives was performed in degassed methanol (conc < 10 −2 M). These compounds were found to be photoreactive only when irradiation vas conducted through quartz vessels with very low conversion quantum yields (ϕR < 10−4. Seven of these compounds are not fluorescent at room temperature but luminescent in rigid matrix (methanol glass) at 77K. It was shown that compound 3 (with a phenyl group on position 4) gives two major photoproducts resulting of the α‐scission of the carbonyl group.
Possible Substitution Mechanisms for Sodium and Carbonate in Calciumhydroxyapatite
Authors: De Maeyer Erna A. P. , Verbeeck Ronald M. H.
Published: September 2010

On the basis of sterical and electrostatical arguments, it is deduced that the stoichiometry of Na+‐ and CO32‐‐containing calciumhydroxyapatite can be accounted for by 6 substitution mechanisms

magnified image

where Vxstands for a vacancy in the X‐sublattice. It is shown that every mechanism proposed in the literature up to now can be related to these fundamental mechanisms, or to a linear combination of some of them, in this respect, these 6 mechanisms offer an indispensable basis for a systematic derivation of the mechanisms that account for the Na+‐ and CO32‐‐incorporation in some particular apatites. The contributions of each of these mechanisms should be estimated on the basis of a thorough chemical as well as physical analysis of the samples.
1,3‐Dipolar cycloaddition reactions of some 3‐aryl‐phthalazinium‐1‐olates
Authors: Çelebi N. , Türker L.
Published: September 2010

The participation of halogen substituted 3‐aryl‐phthalazinium‐1‐olates in cycloaddition reactions were studied with various olefinic and acetylenic dipolarophiles. The betaines gave the expected cycloadducts with vinyl acetate, vinyl phenyl ether, and vinyl phenyl sulfide. However, two isomeric products were obtained with diethyl acetylenedicarboxylate. One of them was the normal expected cycloadduct and the other one was the rearranged cycloadduct. On the other hand, reactions with phenyl acetylene produced only the rearranged cycloadducts.
Ruthenium–Indenylidene Olefin Metathesis Catalyst with Enhanced Thermal Stability
Authors: Kabro Anzhelika , Roisnel Thierry , Fischmeister Cédric , Bruneau Christian
Published: September 2010

Two new ruthenium complexes bearing a bidentate (κ2O,C)‐isopropoxy–indenylidene ligand and a PPh3 (9) or PCy3 (10, Cy=cyclohexyl) ligand have been synthesized and fully characterized by 1H and 13C NMR spectroscopy and X‐ray crystallography. Complex 10 displays a very high thermal stability with a half life of six days at 110 °C in [D8]toluene. Complex 10 was evaluated in various ring‐closing metathesis reactions and ring‐opening metathesis polymerization of dicyclopentadiene, in which it showed a latent behavior with low activity at room temperature and high activity upon thermal activation.
ChemInform Abstract: Ag6Mo2O7F3Cl: A New Silver Cathode Material for Enhanced ICD Primary Lithium Batteries.
Authors: Sauvage F. , Bodenez V. , Tarascon J.‐M. , Poeppelmeier K. R.
Published: September 2010

The title compound is hydrothermally prepared from a mixture of Ag2O, MoO3, 4‐hydroxypyridine, HF, HCl, and H2O in the molar ratio of 2:2:5:30:4:4 (autoclave, 150 °C, 24 h, 72% yield).
ChemInform Abstract: Fabrication and Visible Light Photocatalytic Activity of a Novel Ag/TiO2‐xNx Nanocatalyst.
Authors: Virkutyte Jurate , Varma Rajender S.
Published: September 2010

A facile one‐pot synthesis of guanidine‐doped TiO2 nanoparticles with a silver deposit is reported.
ChemInform Abstract: XeF2 Coordination to a Halogen Center; Raman Spectra (n = 1, 2) and X‐Ray Crystal Structures (n = 2) of [BrOF2][AsF6]·nXeF2 and [XOF2][AsF6] (X: Cl, Br).
Authors: Brock David S. , Casalis de Pury Jonathan J. , Mercier Helene P. A. , Schrobilgen Gary J. , Silvi Bernard
Published: September 2010

Compound (IV) crystallizes in the space group P21/3 with Z = 4 and [ClOF2][AsF6] in the space group Pna2/1 with Z = 4.
ChemInform Abstract: Synthesis and Structural Characterization of Molecular Dy(III) and Er(III) Tetra‐Carbonates.
Authors: Goff George S. , Cisneros Michael R. , Kluk Chandra , Williamson Kevin , Scott Brian , Reilly Sean , Runde Wolfgang
Published: September 2010

Single crystals of [C(NH2)3]5 [Er(CO3)4]·11H2O (I) and [C(NH2)3]4 [Dy(CO3)4(H2O)] (H3O)·13H2O (II) are prepared by evaporation at 3 °C of aqueous solutions of Ln(NO3)3 (Ln: Er, Dy) and guanidinium carbonate.
ChemInform Abstract: Thermal, Magnetic, Electronic, and Superconducting Properties of Rare‐Earth Metal Pentagermanides REGe5 (RE: La, Nd, Sm, Gd) and Synthesis of TbGe5.
Authors: Meier Katrin , Cardoso‐Gil Raul , Schnelle Walter , Rosner Helge , Burkhardt Ulrich , Schwarz Ulrich
Published: September 2010

The new compound TbGe5 is obtained from a stoichiometric mixture of Tb and Ge under high‐pressure, high‐temperature conditions (8.3 GPa, 820 K, 9 h).
ChemInform Abstract: Triniobiumoctabromide, Nb3Br8, Revisited.
Authors: Habermehl Katja , Meyer Gerd
Published: September 2010

Single crystals of Nb3Br8 are prepared by reaction of NbBr5 (obtained from Nb powder and bromine in a sealed Nb ampule at 300 °C) with the wall of the Nb reaction vessel at 800 °C for 2 d (25% yield).
ChemInform Abstract: Simplified Synthesis and Structural Study of {Ta6Br12} Clusters.
Authors: Sokolov Maxim N. , Abramov Pavel A. , Mikhailov Maxim A. , Peresypkina Eugenia V. , Virovets Alexander V. , Fedin Vladimir P.
Published: September 2010

A simple and straightforward method for the preparation of Ta6Br12 cluster compounds is described, The structures of (III) (cubic, space group Fd$\bar 3$m, Z = 8), (IV) (triclinic, P$\bar 1$, Z = 2), (V) (triclinic, P$\bar 1$, Z = 2), and (VI) (orthorhombic, Cmca, Z = 4) are determined by single crystal XRD.
ChemInform Abstract: Crystal Chemistry of the Potassium and Rubidium Uranyl Borate Families Derived from Boric Acid Fluxes.
Authors: Wang Shuao , Alekseev Evgeny V. , Stritzinger Jared T. , Depmeier Wulf , Albrecht‐Schmitt Thomas E.
Published: September 2010

The crystal structures of (IV), (VI), (VIII), and (IX) are determined by single crystal XRD.
ChemInform Abstract: Uranium(VI) Tetraoxido Core Coordinated by Bidentate Nitrate.
Authors: Unruh Daniel K. , Baranay Michelle , Baranay Melissa , Burns Peter C.
Published: September 2010

The structures of (III) (orthorhombic, space group Pbca, Z = 8) and (V) (Pbca, Z = 4) are determined by single crystal XRD.
ChemInform Abstract: Synthesis, Crystal Structure, and Characterization of a New Metal Borophosphate: PbII4{Co2 [B(OH)2P2O8] (PO4)2}Cl.
Authors: Yang Miao , Chen Peng , Welz‐Biermann Urs
Published: September 2010

Title compound (III) crystallizes in the trigonal space group R$\bar 3$c with Z = 18 (single crystal XRD).
ChemInform Abstract: (H2en)2Cu8Sn3S12: A Trigonal CuS3‐Based Open‐Framework Sulfide with Interesting Ion‐Exchange Properties.
Authors: Zhang Ren‐Chun , Yao Hua‐Gang , Ji Shou‐Hua , Liu Mei‐Chen , Ji Min , An Yong‐Lin
Published: September 2010

The title compound is synthesized solvothermally by reaction of Sn, Cu, and S in ethylenediamine (autoclave, 145 °C, 7 d, 47% yield).
ChemInform Abstract: The First Nonaselenium Ring.
Authors: Demchenko Pavlo Yu. , Gladyshevskii Roman E. , Volkov Sergei V. , Yanko Oleg G. , Kharkova Lyudmila B. , Fokina Zoya A. , Fokin Andrey A.
Published: September 2010

Rh2Se9Cl6 is synthesized by heating RhCl3·4H2O with excess Se2Cl2 (L‐shaped glass reactor, 100 °C, 180 h, 90% yield).
ChemInform Abstract: CaCu3Pt4O12: The First Perovskite with the B Site Fully Occupied by Pt4+.
Authors: Yamada Ikuya , et al. et al.
Published: September 2010

The new title compound is prepared by reaction of a stoichiometric mixture of CaO, CuO, and PtO2 under high‐pressure/high‐temperature conditions (gold capsule, 12 GPa, 1250 °C, 30 min).
ChemInform Abstract: Immunosuppressive Resveratrol Aneuploids from Hopea chinensis
Authors: Ge Hui Ming , Yang Wen Hao , Shen Yan , Jiang Nan , Guo Zhi Kai , Luo Qiong , Xu Qiang , Ma Jing , Tan Ren Xiang
Published: September 2010

In addition to the title compounds (I) and (II), the polyphenol diptoindonesine G (III) is isolated from the ethanol extract of H.
ChemInform Abstract: Synthesis of Novel H8‐Binaphthol‐Based Chiral Receptors and Their Applications in Enantioselective Recognition of 1,2‐Amino Alcohols and Chirality Conversion of L‐Amino Acids to D‐Amino Acids.
Authors: Jung Hyein , Nandhakumar Raju , Yoon Hoe‐Jin , Lee Sang‐gi , Kim Kwan Mook
Published: September 2010

Chiral binaphthol‐based receptors (I) are prepared for the use in enantioselective recognition of 1,2‐amino alcohols and for the conversion of L‐amino acids to D‐amino acids.
ChemInform Abstract: Asymmetric Synthesis of New Chiral β‐Amino Acid Derivatives by Mannich‐Type Reactions of Chiral N‐Sulfinyl Imidates with N‐Tosyl Aldimines.
Authors: Colpaert Filip , Mangelinckx Sven , De Kimpe Norbert
Published: September 2010

New chiral β‐(sulfonylamino)sulfinylimidates (III) are formed as new chiral β‐amino ester equivalents in high overall yield and excellent diastereomeric excess via anti‐selective addition reactions of N‐sulfinyl imidates across N‐tosyl aldimines.
ChemInform Abstract: Phosphinite Thioethers Derived from Chiral Epoxides. Modular P,S‐Ligands for Pd‐Catalyzed Asymmetric Allylic Substitutions.
Authors: Caldentey Xisco , Pericas Miquel A.
Published: September 2010

A number of new phosphinite thioethers are prepared and tested in title reactions.
ChemInform Abstract: Structure—Reactivity Relationships of L‐Proline Derived Spirolactams and α‐Methyl Prolinamide Organocatalysts in the Asymmetric Michael Addition Reaction of Aldehydes to Nitroolefins.
Authors: Kelleher Fintan , Kelly Sinead , Watts John , McKee Vickie
Published: September 2010

Among a range of L‐proline‐derived lactams and amides, spirocyclic lactams (I), (II) and amide (III) possess the best catalytic activity in the title Michael addition of aldehydes towards β‐nitrostyrenes (IV).
ChemInform Abstract: Trialkylamine‐Mediated Intramolecular Acylation of Alkenes with Carboxylic Acid Chlorides
Authors: Matsuo Jun‐ichi , Hoshikawa Takaya , Sasaki Shun , Ishibashi Hiroyuki
Published: September 2010

scope and limitations
ChemInform Abstract: Tricyclic Dihydroquinazolinones as Novel 5‐HT2C Selective and Orally Efficacious anti‐Obesity Agents.
Authors: Ahmad Saleem , et al. et al.
Published: September 2010

Synthesis and biological evaluation of a series of novel and highly selective dihydroquinazolinone‐derived 5‐HT2C agonists with no detectable agonism of the 5‐HT2B receptor are described.
ChemInform Abstract: Broensted Acid Catalyzed Asymmetric Reduction of Ketones and Acyl Silanes Using Chiral anti‐Pentane‐2,4‐diol.
Authors: Matsuo Jun‐ichi , Hattori Yu , Ishibashi Hiroyuki
Published: September 2010

The metal‐free asymmetric reduction of ketones that uses the chiral diol (II) under Broensted acid catalysis is reported.
ChemInform Abstract: Synthesis and Antitumor Evaluation of Novel Cyclic Arylsulfonylureas: ADME‐T and Pharmacophore Prediction.
Authors: El‐Deeb Ibrahim M. , Bayoumi Said M. , El‐Sherbeny Magda A. , Abdel‐Aziz Alaa A.‐M.
Published: September 2010

Three series of cyclic arylsulfonylureas are synthesized comprising the sulfonylurea pharmacophores that are structurally related to sulofenur and its cyclic form.
ChemInform Abstract: Cu‐Catalyzed Oxidative Amidation of Propiolic Acids under Air via Decarboxylative Coupling.
Authors: Jia Wei , Jiao Ning
Published: September 2010

Carbon dioxide as sole by‐product and air as oxidant make this method also attractive for industrial application.
ChemInform Abstract: Copper‐Catalyzed Amination of Primary Benzylic C—H Bonds with Primary and Secondary Sulfonamides.
Authors: Powell David A. , Fan Hope
Published: September 2010

The amination of secondary benzylic C—H bonds is also possible.
ChemInform Abstract: C—N Coupling of Nitrogen Nucleophiles with Aryl and Heteroaryl Bromides Using Aminoarenethiolato—Copper(I) (Pre‐)Catalyst.
Authors: Sperotto Elena , van Klink Gerard P. M. , De Vries Johannes G. , van Koten Gerard
Published: September 2010

A variety of title Cu(I) aminoarenethiolates is prepared and studied in the N‐arylation of primary and secondary amines.
ChemInform Abstract: Alkylation and Aldol Reactions of Acyl Derivatives of N‐1‐(1′‐Naphthyl)ethyl‐O‐tert‐butylhydroxylamine: Asymmetric Synthesis of α‐Alkoxy‐, α‐Substituted‐β‐alkoxy‐ and α,β‐Dialkoxyaldehydes.
Authors: Chernega Alexander N. , Davies Stephen G. , Flechter Ai M. , Goodwin Christopher J. , Hepworth David , Prasad R. Shyam , Roberts Paul M. , Savory Edward D. , Smith Andrew D. , Thomson James E.
Published: September 2010

Alternatively, the chiral auxiliary promotes aldol reactions to give syn‐aldol products such as (XIII), (XVI), or (XX) with good diastereocontrol over both newly generated stereogenic centers.
ChemInform Abstract: Pd(0)‐Catalyzed Couplings Using Bromide and Chloride Derivatives of Baylis—Hillman Adducts with Triarylbismuths as Atom‐Efficient Multi‐Coupling Nucleophiles.
Authors: Rao Maddali L. N. , Banerjee Debasis , Dhanorkar Ritesh J.
Published: September 2010

Optimized reaction conditions are presented for the Pd‐catalyzed coupling of halogenated Baylis—Hillman adducts, e.g. (II) or (VIII), with triarylbismuth reagents (I).
ChemInform Abstract: Highly Active Chiral Ruthenium‐Based Metathesis Catalysts Through a Monosubstitution in the N‐Heterocyclic Carbene.
Authors: Tiede Sascha , Berger Anke , Schlesiger David , Rost Daniel , Luehl Anja , Blechert Siegfried
Published: September 2010

Ring‐opening cross metathesis reaction of norbornene derivatives with styrene derivatives proceeds smoothly in the presence of a novel Ru catalyst.
ChemInform Abstract: Sodium Borohydride‐Mediated Transesterification.
Authors: Sereda Grigoriy , Pothula Swetha , Dreessen James
Published: September 2010

Sodium borohydride in ethanol is introduced as a mild reagent for the transesterification of methyl esters.
ChemInform Abstract: Bromodimethylsulfonium Bromide—ZnCl2: A Mild and Efficient Catalytic System for Beckmann Rearrangement.
Authors: Yadav Lal Dhar S. , Patel Rajesh , Srivastava Vishnu P.
Published: September 2010

Optimized reaction conditions are developed for the rearrangement of various ketoximes to afford amides or lactones in high yields.
ChemInform Abstract: Potassium Hydride in Paraffin: A Useful Base for Williamson Ether Synthesis.
Authors: Huang Haihong , Nelson Christopher G. , Taber Douglass F.
Published: September 2010

A procedure for the preparation of KH in paraffin from potassium metal and hydrogen is developed.
ChemInform Abstract: [Hmim]3PW12O40: A High‐Efficient and Green Catalyst for the Acetalization of Carbonyl Compounds.
Authors: Dai Yan , Li Bin Dong , Quan Heng Dao , Lue Chun Xu
Published: September 2010

The new catalyst is easily prepared as a white solid with high melting point (<300 °C) and can be reused more than 10 times without any loss of activity.
ChemInform Abstract: Green and Novel Protocol for One‐Pot Synthesis of β‐Acetamido Carbonyl Compounds Using Mn(bpdo)2Cl2/MCM‐41 Catalyst.
Authors: Heravi Majid M. , Daraie Mansoureh , Behbahani Farahnaz K. , Malakooti Reihaneh
Published: September 2010

A simple, efficient and green protocol for the preparation of β‐acetamido carbonyl compounds (IV) and (VI) using a reusable catalyst is given.
ChemInform Abstract: A New Synthesis of Cyanocyclopropanes by the Intramolecular Alkylation of Magnesium Carbenoids as the Key Reaction.
Authors: Saitoh Hideki , Satoh Tsuyoshi
Published: September 2010

Multisubstituted cyanocyclopropanes are synthesized via reaction of 1‐chloroalkyl p‐tolyl sulfoxides with Grignard reagents followed by quenching of the intermediate cyclopropylmagnesium halides with electrophiles.
ChemInform Abstract: Heck‐Type Hydroarylations and 1,3‐Dipolar Cycloaddition Reactions of New Tricyclic Hydrazones.
Authors: Gul Melek , Ocal Nuket
Published: September 2010

The reductive Heck reaction of hydrazones (I) affords the tricyclic pyrolidinediones (III) as single exo‐diastereomers.
ChemInform Abstract: Noncatalytic Electrophilic Oxyalkylation of Anilines with 2‐Trifluoroacetyl‐1,3‐benzothiazole.
Authors: Khodakovskiy Pavel V. , Mykhailiuk Pavel K. , Volochnyuk Dmitriy M. , Tolmachev Andrey A.
Published: September 2010

The regioselectivity of the process, which forms biologically interesting CF3‐substituted tertiary alcohols, strongly depends on the structure of the aniline derivative.
ChemInform Abstract: A Simple and Efficient Method for the Three‐Component Synthesis of Homoallylic Amines Catalyzed by Indium Triflate.
Authors: Narsaiah A. Venkat , Kumar J. Kranthi , Narsimha P.
Published: September 2010

The process can be applied to a broad spectrum of substrates to give various title compounds as drug synthons.
ChemInform Abstract: Reduction of Nitrosobenzenes to Azoarenes with SmI2.
Authors: Ye Wei , Ding Wenbo , Hu Zhang , Yu Yongping , Zhou Hongbin
Published: September 2010

The exact amount of SmI2 in the reaction system is crucial for the N‐N coupling reaction.
ChemInform Abstract: Preparation of syn‐Tertiary Homoallylic Alcohols Utilizing Allenyltitanocenes Generated by Reductive Titanation of γ‐Trimethylsilylpropargylic Carbonates.
Authors: Yatsumonji Yasutaka , Sugita Takenori , Tsubouchi Akira Tsubouchi Akira , Takeda Takeshi
Published: September 2010

Aromatic and α,β‐unsaturated ketones are converted with high diastereoselectivities.
ChemInform Abstract: Rhodium‐Catalyzed Reductive Allylation of Conjugated Aldehydes with Allyl Acetate
Authors: Vasylyev Maksym , Alper Howard
Published: September 2010

furnishing homoallylic alcohols in good yields
ChemInform Abstract: Formation of Chiral Tertiary Homoallylic Alcohols via Evans Aldol Reaction or Enzymatic Resolution and Their Influence on the Sharpless Asymmetric Dihydroxylation.
Authors: Theurer Matthias , Fischer Peter , Baro Angelika , Nguyen Giang Son , Kourist Robert , Bornscheuer Uwe , Laschat Sabine
Published: September 2010

The Evans aldol addition to acetophenone is an environmentally benign method compared to the allylstanne procedure.
ChemInform Abstract: Rapid and Selective Catalytic Oxidation of Secondary Alcohols at Room Temperature by Using (N‐Heterocyclic Carbene)—Ni0 Systems.
Authors: Berini Christophe , Winkelmann Ole H. , Otten Jennifer , Vicic David A. , Navarro Oscar
Published: September 2010

The use of 2,4‐dichlorotoluene as a solvent is crucial to shorten the reaction time from hours (in dioxane) to minutes.
ChemInform Abstract: Which Is the Actual Catalyst: Chiral Phosphoric Acid or Chiral Calcium Phosphate?
Authors: Hatano Manabu , Moriyama Katsuhiko , Maki Toshikatsu , Ishihara Kazuaki
Published: September 2010

A highly enantioselective direct Mannich‐type reaction of aldimines with a broad range of 1,3‐dicarbonyl compounds with the use of a chiral phosphoric acid in the presence or absence of Ca(II) is demonstrated.
ChemInform Abstract: Zinc Chloride‐Catalyzed Expeditious Route to Nitriles.
Authors: Paesha M. A. , Nizam Aatika
Published: September 2010

A simple, solvent‐free, and efficient method to get nitriles by microwave‐assisted reaction of different aromatic aldehydes with hydroxylamine in the presence of ZnCl2 is described.
ChemInform Abstract: Selective and Mild Oxidation of Sulfides to Sulfoxides by H2O2 Using DBUH‐Br3 as Catalyst.
Authors: Bakavoli Mehdi , Kakhky Alireza Motavalizadeh , Shiri Ali , Ghabdian Mahdieh , Davoodnia Abolghasem , Eshghi Hossein , Khatami Mola
Published: September 2010

The process is finished within a short time and functional groups remain intact.
ChemInform Abstract: Rational Exploration of N‐Heterocyclic Carbene (NHC) Palladacycle Diversity: A Highly Active and Versatile Precatalyst for Suzuki—Miyaura Coupling Reactions of Deactivated Aryl and Alkyl Substrates.
Authors: Peh Guang‐Rong , Kantchev Eric Assen B. , Er Jun‐Cheng , Ying Jackie Y.
Published: September 2010

A small library of NHC‐palladacycles is prepared by heating readily available palladacycle acetates with imidazolium salts.
ChemInform Abstract: Room‐Temperature Direct Arylation of Polyfluorinated Arenes under Biphasic Conditions.
Authors: Rene Olivier , Fagnou Keith
Published: September 2010

Using an immiscible mixture of ethyl acetate and water, the reaction of aryl iodides with electron‐poor polyfluoroarenes proceeds at room temperature.
ChemInform Abstract: Multicomponent Synthesis of 3,5‐Diaryl‐2,6‐dicyanoanilines under Thermal Solvent‐Free Conditions.
Authors: Shaterian Hamid Reza , Honarmand Moones , Oveisi Ali Reza
Published: September 2010

Advantages of the title reaction are the green solvent‐free conditions, the operational simplicity and low cost of K2CO3 and the suitability in industrial applications.
ChemInform Abstract: Regioselective Synthesis of Highly‐Substituted Biaryls by Reaction of Vinyl Malononitriles with Acetylenic Esters.
Authors: Esmaeili Abbas Ali , Moradi Abbas , Mohammadi Hanieh Khoddam
Published: September 2010

Cyclocondensation of benzylidenemalononitriles (I) with acetylenedicarboxylates (II) proceeds smoothly in the presence of sodium alkoxide base to afford biaryl derivatives containing one electron‐donor and three electron‐acceptor substituents (III) in good yields.
ChemInform Abstract: “On Water” Assisted Synthesis and Biological Evaluation of Nitrogen and Sulfur Containing Hetero‐1,4‐naphthoquinones as Potent Antifungal and Antibacterial Agents.
Authors: Tandon Vishnu K. , Maurya Hardesh K. , Verma Manoj K. , Kumar Rohitashw , Shukla Praveen K.
Published: September 2010

The reactions of naphthoquinone derivative (I) with different amines and thiols and intramolecular nucleophilic addition—elimination and cyclization reactions in the presence or absence of a base using water as solvent are studied.
ChemInform Abstract: Pinacol Coupling of 2,2′‐Biaryldiketone: An Application for the Synthesis of Enantiopure 3,4‐Dihydrodibenzo[c,g]phenanthrene‐3,4‐diol Derivatives.
Authors: Kitamura Mitsuru , Shiomi Kazufumi , Kitahara Daisuke , Yamamoto Yasuaki , Okauchi Tatsuo
Published: September 2010

The required products are exclusively obtained from substrates (I) bearing alkyl substitutents.