bluuebunny/crossref_metadata_2025 huggingface dataset:
Nucleophilic Additions of the Cyanide Anion to 4,4-Dichloro-1,1-Diphenyl-2-Azabuta-1,3-Diene
Authors: Jacquot-Rousseau Sandrine , Schmitt Gérard , Laude Bernard , Kubicki Marek M. , Blacque Olivier
Published: December 2009

The unexpected formation of a 2H-pyrrole by reaction of potassium cyanide with 4,4-dichloro-1,1-diphenyl-2-azabuta-1,3-diene and the mechanism of this reaction are described and the structures of the product and a trapped intermediate confirmed by X-ray crystallographic studies.
A Modified Method to Prepare Diselenides by the Reaction of Selenium with Sodium Borohydride
Authors: Yang Xiangliang , Wang Qin , Tao Yunhai , Xu Huibi
Published: December 2009

With a 8:1 molar ratio of selenium to borohydride, sodium diselenide can be prepared conveniently and safely in alkaline aqueous or ethanol solution, which can be used directly to synthesise symmetric diselenides in high yields.
Photocyclisation of 3-Alkoxythiochromones: Activation for H-Abstraction
Authors: Gupta Satish C. , Sharma Somesh , Yusuf Mohamad , Arora Surinder , Saini Ashok , Kamboj Ramesh C. , Dhawan Som N.
Published: December 2009

Photocyclisation of 3-alkoxy-2-arylthiochromones leads to angular tetracyclic compounds through H-abstraction that requires activation by a phenyl group.
Acid Hydrolysis of an Ether Bond Assisted by the Neighbouring Amide Group: Effects Induced by Salts and by Structural Changes Part 61-5
Authors: Arcelli Antonio , Paradisi Francesca , Porzi Gianni , Rinaldi Samuele , Sandri Sergio
Published: December 2009

The acid hydrolysis of 1 assisted by the neighbouring amide group was kinetically investigated and salt effects were studied; the thermodynamic activation parameters calculated for the acid hydrolysis of other substrates (3–6) indicate that the methyl group in the side chain works on the enthalpic or on the entropic factor depending on the size of ring formed.
Reinvestigation of the Reaction of 8-Bromoguanine Derivatives with Sodium Thiosulfate
Authors: Ikaunieks Martins , Madre Marina
Published: December 2009

A convenient method for the synthesis of 8-thioguanine derivatives using sodium thiosulfate has been reinvestigated on different 8-bromoguanine-containing precursors.
Synthesis and Biological Activity of 1,3,4-Oxadiazole-Substituted Pyridazinones
Authors: Zou Xiajuan , Zhang Zuxin , Jin Guiyu
Published: December 2009

Novel 3-(1,3,4-oxadiazol-2-yl)-1-aryl-6-methylpyridazin-4-ones have been synthesised by two methods. A preliminary bio-activity test showed that these compounds exhibit high antifungal activity.
[Yb(OTf)3] Catalysed Facile Conversion of Ketoximes to Amides and Lactams
Authors: Yadav J.S. , Reddy B.V.S. , Madhavi A.V. , Ganesh Y.S.S.
Published: December 2009

A variety of ketoximes undergo the Beckmann rearrangement upon treatment with a catalytic amount of [Yb (OTf)3] in refluxing acetonitrile to afford the corresponding amides and lactams in excellent yields with high selectivity.
The Photoelectrochemical Oxidation of Benzyl Derivatives at Ti/TiO2 Anodes. A Mechanistic Approach Through Current Efficiency and Density Measurements
Authors: Ranchella Michele , Rol Cesare , Sebastiani Giovanni V.
Published: December 2009

The mechanism of the photoelectrochemical sensitised oxidation of 4- and 3-methoxybenzyl alcohols and silanes at Ti/TiO2 ‘anatase’ and ‘rutile’ photoanodes has been investigated through current efficiency and density measurements.
A Convenient One-Pot Synthesis of 4-Methyl-3-Phenyl-, 3-Aryl- and 3-Aryl-4-Phenylcoumarins
Authors: Kamat Shrivallabh P. , D'Souza Asha M. , Paknikar Shashikumar K. , Beauchamp Philip S.
Published: December 2009

Thermal condensation of 2′-hydroxyacetophenones 1a–e with phenylacetic acid 2a in refluxing diphenyl ether gives 4-methyl-3-phenylcoumarins 3a–e. Similarly, reaction of 2-hydroxybenzaldehydes 1f–m and 2-hydroxybenzo-phenones 1n–p with phenylacetic acids 2a–d gives the corresponding 3-arylcoumarins 3f–m and 3-aryl-4-phenylcoumarins 3n–p respectively. Formation of esters 4 and 5 and benzofuran 6 is also observed.
An Extended Network via Hydrogen Bond Linkage of the Linear Coordination Polymer [Cd(μ-dptz)(NO3)2]∞
Authors: Du Miao , Bu Xian-He , Biradha Kumar , Shionoya Mitsuhiko
Published: December 2009

The crystal structure of [Cd(μ-dptz)(NO3)2]∞ reveals a neutral one-dimensional coordination polymer exhibiting a two-dimensional architecture through inter-chain hydrogen-bonding.
Facile Reduction of Benzopyrones with Nickel Boride: A New Method for Synthesis of 2H-1-Benzopyran-4-Ols
Authors: Khurana Jitender M. , Chauhan Sushma
Published: December 2009

Reduction of various benzopyrones to the corresponding 2H-1-benzopyran-4-ols by nickel boride in methanol at ambient temperature is reported
Synthesis, Structure and Chiral Inclusion Crystallisation of Tetrakis(4-Ethynylphenyl)Ethylene Derivatives
Authors: Tanaka Koichi , Hiratsuka Takaichi , Kojima Yuko , Osano Yasuko T.
Published: December 2009

Achiral host molecules, tetrakis(4-ethynylphenyl)ethylene 3 and tetrakis(4-bromoethynylphenyl)ethylene 4, formed chiral host–guest inclusion crystals with achiral guest molecules via weak intermolecular interactions.
Synthesis of 2′,3′-Dideoxynucleosides from 2-(Methylsulfanyl)Uracils
Authors: Abdel-Rahman Adel A.-H. , Abdel-Aal Mohamed T.
Published: December 2009

Silylated 2-(methylsulfanyl)uracils were condensed in the presence of TMS triflate with methyl 2,3-dideoxy-5-O-(4-methylbenzoyl)-D-glycero-pentofuranoside (2) to give, after deprotection, the corresponding nucleosides 6a-f and 7a-f.
Oxidation of Alcohols with Butyltriphenylphosphonium Periodate under Non-Aqueous Conditions
Authors: Hajipour Abdol Reza , Mallakpour Shadpour E. , Samimi Heshmat A.
Published: December 2009

The combination of butyltriphenylphosphonium periodate (BUTPPPI) and aluminum chloride in refluxing acetonitrile affords an efficient and mild system for the oxidation of a variety of alcohols, to the corresponding aldehydes and ketones. The experimental procedure is simple and the products are easily isolated in good yields.
Ab Initio Calculation of Thermodynamic and Kinetic Quantities for 1,3-Dipolar Cycloadditions of Benzonitrile Oxide with Various Dipolarophiles
Authors: Rajaian E. , Monajjemi M. , Gholami M.R.
Published: December 2009

Ab initio molecular orbital calculations have been used to investigate the structures and transition states of 1,3-dipolar cycloadditions between benzonitrile oxide with ethylene, acrylonitrile, tetracyanoethylene and cyclopentene. Geometry optimisations and energy calculations were performed with RHF/6–31G*//RHF/6–31G* in each case. Calculation of vibrational frequencies permitted computation of the enthalpies, Gibbs free energies and rate constant of reactions. Cycloadditions of 1,3-dipolar benzonitrile oxide with electron-poor dipolarophiles have higher rates and lower thermodynamic stability than with other dipolarophiles.
Palladium(0)-Catalysed Cyclisation of Functionalised Allenyl Ethers with Hypervalent Iodonium Salts
Authors: Kang Suk-Ku , Ha Young-Hwan , Yang Han-Yong
Published: December 2009

The palladium(0)-catalysed coupling and cyclisation of allenyl alcohols and allenyl amines with hypervalent iodonium salts afforded cyclised heterocyclic acetals and morpholines under mild conditions.
An Efficient Method for the Oxidation of Aryl Substituted semicarbazides to aryl azo compounds with NaNO2-Ac2O
Authors: Li Xiao-Chuan , Wang Yu-Lu , Wang Jin-Ye
Published: December 2009

In this paper 18 aryl substituted semicarbazides undergo rapid oxidation to the corresponding aryl azo compounds using NaNO2-acetic anhydride as a novel oxidizing agent under mild conditions for the first time.
A Chemical Chaotic System Derived from Chua's Circuit
Authors: Xu Wei Guo , Li Qian Shu
Published: December 2009

Chua's circuit is converted into a mass action chemical system with Samardzija's nonlinear transformation method.
Transamination Reactions of 1,1-Diamino-2,2-Dinitroethene (FOX-7)
Authors: Bellamy Anthony J. , Latypov Nikolaj V. , Goede Patrick
Published: December 2009

Treatment of 1,1-diamino-2,2-dinitroethene (FOX-7) with a variety of amines and hydrazine, results in at least one, and in some cases both, of the amino groups being replaced to give N-substituted and N,N'-disubstituted 1,1-diamino-2,2-dinitroethenes.
Investigation on the Extraction of Molybdenum(VI)5-Chloro-7-Iodo-8-Quinolinol/5,7-Diiodo-8-Quinolinol into N-Butanol and its Analytical Application
Authors: Ramadevi L.
Published: December 2009

A simple extraction-spectrophotometric method has been developed for determining 5,7-diiodo-8-quinolinol(diiodoquin/DIQH)5-chloro-7-iodo-8-quinolinol(clioquinol/CIQH) in pills and ointments and also important observations were made in deducing the composition of the extracted species.
A Direct Synthetic Approach to Tripodal Imidazole Compounds
Authors: Yuan Yi , Xiao Rong , Gao Ge , Su Xiao-Yu , Yu Hua , You Jinsong , Xie Ru-Gang
Published: December 2009

Convenient syntheses of tripodal histidine, 2-benzimidazolylthio, imidazole and benzimidazole compounds (1–4) is reported.
Thiophene S-oxides
Authors: Thiemann Thies , Dongol Krishna Gopal
Published: December 2009

Methods for the preparation of thiophene S-oxides, their roles in thiophene metabolism, and the structures and chemical reactivity of these compounds, are discussed.
Facile Enantioselective Synthesis of 6R-(+)-Goniothalamin and (6R, 7R, 8R)-(+)-Goniothalamin Oxide
Authors: Peng Xiaoshui , Li Anpai , Shen Hao , Wu Tongxing , Pan Xinfu
Published: December 2009

Facile enantioselective total syntheses of 6R-(+)-goniothalamin 1 and (6R, 7R, 8R)-(+)-goniothalamin oxide 2 were achieved through the Sharpless kinetic resolution of racemic secondary 2- furylmethanol 3 in a short synthetic route.
Knoevenagel Condensation in the Heterogeneous Phase using KF-Montmorillonite as a New Catalyst
Authors: Shi Da-qing , Wang Xiang-shan , Yao Chang-sheng , Mu Lailong
Published: December 2009

The Knoevenagel condensation of aromatic aldehydes was carried out in DMF as solvent on KF-Montmorillonite catalyst, using malononitrile and ethyl cyanoacetate as the acidic methylene reagents. Only the e isomers of the products were obtained and confirmed by X-ray analysis.
Estimation of Potential Brønsted Acid Site Concentration in Microporous SAPO-5
Authors: Zanjanchi Mohammad Ali , Khadem-Nahvi Fatemeh
Published: December 2009

An ammonium-exchange treatment followed by a Kjeldahl ammonium ion measurement was used to estimate the total potential Brønsted acid site concentration in silicon-substituted AlPO-5 microporous aluminophosphates.
Alkane Oxygenation with Hydrogen Peroxide Catalysed by Soluble Derivatives of Nickel and Platinum
Authors: Shul'pin Georgiy B.
Published: December 2009

Various alkanes can be oxidised by hydrogen peroxide in acetonitrile solution at 70°C if Ni(ClO4)2 (in the presence of 1,4,7-trimethyl-1,4,7-triazacyclononane) or H2PtCl6 are used as catalysts; whereas the nickel-catalysed reaction seems to proceed via attack of hydroxyl radicals on an alkane, the oxidation in the presence of platinum occurs possibly with participation of oxo or peroxo derivatives of this metal.
Reactions of Carbonyl Compounds in Basic Solutions. Part 351: The Alkaline Hydrolysis and Reactivity – Structure – Spectra Correlations of (Z)-4-(Substituted Benzylidene)-2-Phenyl-4H-Oxazol-5-Ones
Authors: Bowden Keith , Perjéssy Alexander , Benko Ján , Fabian Walter M. F. , Kolehmainen Erkki , Melikian Gauguik S. , Hritzová Ol'ga , Laihia Katri , Vollárová Ol'ga , Taupuzian Vigen O. , Kiriakossian Nelli , Nissinen Maija
Published: December 2009

The kinetics of the alkaline hydrolysis and the configuration, conformation and electronic structure were studied using IR, NMR spectroscopy, X-ray analysis and AM1 theoretical calculations for a series of (Z)-4-(substituted benzylidene)-2-phenyl-4H-oxazol-5-ones (1) and compared with analogous results reported for (E)-4-benzylidene-2-phenyl-4H-furan-5-ones (5) and related compounds.
Photochemistry of Cyclic Enones. Part 131. Intermolecular Addition of Styrene and 1-Phenylprop-1-Enes with 3-Phenylcyclopentenone and 3-Phenylcyclohexenone
Authors: McMurry T. Brian H. , Murphy Aidan G. , Work D. Neil , Avent Anthony G. , James John P.
Published: December 2009

Arylalkenes undergo photochemical cycloaddition reactions with cyclic enones to give products with specific regio-chemistry and controlled stereochemistry. The regio- and stereo-chemistries can be rationalised in terms of the stability of intermediate radicals.
Chromone Studies. Part 11.1 Synthesis and Electron-Impact Mass Spectrometric Study of Granulosin and Side-Chain Analogues
Authors: Kaye Perry T. , Nchinda Aloysius T. , Gray Christopher A.
Published: December 2009

Granulosin, a chromone constituent of the bark of Galipea granulosa, and four analogues, all of which exhibit toxicity to the brine shrimp Artemia salina, have been prepared from 2′,3′,4′-trihydroxyacetophenone. High-resolution mass spectrometric analysis has permitted elucidation of the fragmentation patterns exhibited by these systems following electron-impact ionisation.
Intrazeolite photo-oxygenation of (R)-(-)-α-phellandrene
Authors: Stratakis Manolis , Sofikiti Nikoletta
Published: December 2009

Thionin-sensitised intrazeolite photo-oxygenation of ( R)-(-)-α-phellandrene affords (1 S,5 R)-5-(1-methylethyl)-2-methylidene-3-cyclohexen-1-yl hydroperoxide as the major ene product. This can be easily reduced with triphenylphosphine to the natural product trans-yabunikkeol.
Reductive Cleavage of Azo Compounds Catalysed by Commercial Zinc Dust and Hydrazinium Monoformate as a New Hydrogen Donor for Heterogeneous Catalytic Transfer Hydrogenation
Authors: Gowda Shankare , Abiraj K. , Gowda D. Channe
Published: December 2009

Azo compounds are reductively cleaved to amine/s at reflux temperature within 15 min by employing less expensive commercial zinc dust and hydrazinium monoformate, a new hydrogen donor for catalytic transfer hydrogenation.
Hypervalent Iodine in Synthesis 73: A New Stereoselective Synthesis of 1-(1-alkenyl) Benzotriazoles by the reaction of Alkenyl(phenyl)iodonium Salts with Benzotriazole
Authors: Zhang Peng-Fei , Chen Zhen-Chu
Published: December 2009

We report the preparation of 1-(1-alkenyl)benzotriazoles from alkenyl (phenyl)iodonium salts and benzotriazole. The reaction offers a simple and convenient route for the stereoselective synthesis of 1-(1-alkenyl)benzotriazoles. In addition, present method is particularly efficient for preparing 1-(1-alkenyl)benzotriazoles with amino-, acyl- and alkoxycarbonyl substituents, which were difficult to prepare by conventional methods.
An Unusual Ozonolysis of the Δ8(14)-unsaturated steroids†
Authors: Krstić Natalija M. , Lorenc Ljubinka B. , Pavlović Vladimir D. , Kalvoda Jaroslav , Tinant Bernard , Declercq Jean-Paul
Published: December 2009

Ozonolysis of the Δ8(14)-unsaturated steroids 1a,b afforded, instead of the expected 8,14-dioxo-8,14-seco derivatives 2a,b two stereoisomeric Δ7-unsaturated ozonides 3a,b and 4a,b.
Short and Stereoselective Synthesis of (E)-3-alkenyl Acetates, Insect Sex Pheromone Constituents of Lepidoptera; Gelechidae
Authors: Ragoussis Valentine , Vamvaka Ekaterini , Kolymbadi Maria
Published: December 2009

(E)-3-alkenyl acetates, which are insect sex pheromone constituents, have been prepared from linear saturated aldehydes, by a short three steps process, via the (E)-3-alkenoic acids and the corresponding (E)-3-alkenols, in good overall yield (60–65%) and high stereochemical purity (>99%).
Theoritical ab initio study of Internal Rotation Barriers, Structures Stabilities and Population of Formamide
Authors: Monajjemi Majid , Haeri Halleh H. , Azad Malihe T.
Published: December 2009

The internal rotational barriers for formamide are calculated in gas and solution phases (acetonitrile) at the HF/6-31G* (16.64 and 16.18 kcal/mol, respectively) and MP2/6-31G* (16.86 and 16.71 kcal/ mol, respectively) level of theory. Calculated parameters are compared with experimental data and there is a good agreement between them. Orbital populations are obtained by MPA (mulliken population analysis) and NPA (natural population analysis) methods and bond energies are calculated by the NBO method (natural bond orbitals). The distribution of atomic charges are also given. These calculation indicate that the internal rotational barrier is produced because of change in the distribution of orbital populations of 2p y, 2p z, d yz, d y2 and dz2 orbitals of the nitrogen atom.
Synthesis of Complementary Hydrogen Bonding Cyclotriveratrylenes
Authors: Darzac Magali , Montésinos Stéphanie , Collet André , Dutasta Jean-Pierre
Published: December 2009

Two new cyclotriveratrylenes CTV-1 and CTV-2 bearing complementary H-bond donor-acceptor substituents were prepared from 4-hydroxy-3-methoxybenzyl alcohol following a multistep strategy to introduce melamine or cyanuric acid substituents.
Syntheses of and Photochemical Studies of 2,3-disubstituted 1,4-epoxy-1,4-dihydronaphthalenes
Authors: Altundaş Aliye , Kara Yunus , Seçen Hasan , Akbulut Nihat
Published: December 2009

A method for synthesis of 3-methyl-1,4-epoxy-1,4-dihydronaphthalene-2-carboxylic acid and 3-methyl-1,4-epoxy-1,4-dihydronaphthalene-2-carbonitrile was developed starting from 1,4-epoxy-1,4-dihydronaphthalene; direct photolysis of 3-methyl-1,4-epoxy-1,4-dihydronaphthalene-2-carbonitrile and methyl 3-methyl-1,4-epoxy-1,4-dihydronaphthalene-2-carboxylate in benzene gave indene derivatives.
Regioselective reaction of a Cyclic Baylis-Hillman Adduct with Alcohols and Thiols
Authors: Gatri Rafik , Rezgui Farhat , Gaïed Mohamed Moncef EL
Published: December 2009

Cyclic Baylis-Hillman adduct 1 reacts with alcohols and thiols in the presence of p-TsOH to give regioselectively the corresponding allylic ethers 4 and thioethers 6 in satisfactory to good yields.
insertion of Selenium into Zinc Carbon Bonds and Its Application in the synthesis of Unsymmetrical Diarylselenides
Authors: Xu Xin-Hua , Liu Wen-Qi
Published: December 2009

Selenium inserts into the zinc carbon bond of aryl zinc halides to form the corresponding zinc selenoates; these react in THF-HMPA with diaryliodonium salts to afford unsymmetrical diaryl selenides in good yields.
The [3+2] Cycloaddition of Diphenyldiazomethane and Ethyl Diazoacetate with Itaconic Anhydride. A New Access to Spiranic Cyclopropane Derivatives
Authors: Roussel Christophe , Ciamala Kabula , Melot Jean-Marie , Vebrel Joel , Riche Claude
Published: December 2009

The reaction of itaconic anhydride 1 with ethyl diazoacetate 2 or diphenyldiazomethane 5 gave the expected spiroderivatives, which spontaneously rearranged; specifically, the adduct from 1 and 5 loses a dinitrogen molecule, yielding a spirocyclopropane related to the known 5-azaspiro[2.4]heptane-4,6-diones or 5-azaspiro[2.4]heptanes.
A Novel and Facile synthesis of Pyrazolo [3,4-b]Pyridines
Authors: Zhao Wei Guang , Li Zheng Ming , Yuan De Kai
Published: December 2009

Pyrazolo[3,4- b]pyridines have been obtained by the condensation of 5-amino-4-cyanopyrazole, readily available by the reaction of dithioacetals with substituted hydrazines, with β-ketoesters or β-diketone in the presence of tin(IV) chloride at reflux temperature in dry toluene.
A Simple Synthesis of 1,1,2-tris-(Hydroxymethyl)-Cyclopropane and Its Dihalo Derivatives
Authors: Finta Zoltán , Hell Zoltán , Cwik Agnieszka , Tőke László
Published: December 2009

The phase transfer catalytic cyclopropanation of the malonic ester of allylic alcohol or its 3,3-dibromo and 3,3-dichloro derivatives yields bicyclic cyclopropane carboxylic acid lactones; reduction of these lactones with LiAlH4 in boiling THF yields the appropriate 1,1,2-tris-(hydroxymethyl)cyclopropanes in satisfactory yield.
Nitration of 1,3,5-Trimethoxybenzene
Authors: Bellamy Anthony J. , Golding Peter , Ward Simon J. , Mitchell Nicholas W.
Published: December 2009

1,3,5-Trimethoxybenzene has been nitrated with N2O5 in organic solvents to give modest yields of the desired 1,3,5-trimethoxy-2,4,6-trinitrobenzene but side reactions involving oxidation and coupling appear to limit the usefulness of this method.
Reductive cyclodimerisation of Arylmethylidenemalononitriles Promoted by Sm/Incl3·4H2O System in Aqueous Media: Highly Stereoselective Synthesis of Cyclopentamine Derivatives
Authors: Wu Huayue , Ding Jinchang
Published: December 2009

In the presence of active indium produced in situ by the Sm/InCl3·4H2O system, arylmethylidenemalononitriles undergo reductive cyclodimerisation to afford cyclopentamine derivatives with high stereoselectivity under mild conditions in aqueous media.
Deacetylation of Activated Acetophenones with Tin(IV) Chloride
Authors: Hadjeri Mohamed , Mariotte Anne-Marie , Boumendjel Ahcène
Published: December 2009

Activated acetophenones were deacetylated by treatment with an excess of tin(IV) chloride in 1,2-dichloroethane.
synthesis of 1-Phenyl -1, 2-Cyclohexadiene and 1-(2-Bromocyclohex-2-En-1-Yl)Benzene and Wurtz-Like Condensation Products in the reaction of 1-(2,3-Dibromocyclohex-1-En-1-Yl) Benzene with Zinc
Authors: Ceylan Mustafa , Budak Yakup
Published: December 2009

The base-catalysed elimination of 1-(2-bromocyclohex-2-en-1-yl)benzene 1 and the zinc-catalysed elimination of 1-(2,3-dibromocyclohex-1-en-1-yl)benzene 9 have been used for the synthesis of 1-phenyl-1,2-cyclohexadiene 2; reaction of 9 with zinc in THF resulted in the formation of two isomeric Wurtz-like condensation products 3 and 4, but the reaction of 1 with t-BuOK gave the allene 2.
A Facile One Step synthesis of 3-[2-(3,5-Dimethyl-1H-Pyrazol-1-Yl)-4-Thiazolyl]-2H-1-Benzopyran-2-Ones Under Solvent Free Conditions
Authors: Rao V. Rajeswar , Srimanth K.
Published: December 2009

Reaction of 3-(2-bromoacetyl)coumarins with thiosemicarbazide and acetylacetone gave 3-[2-(3,5-dimethyl-1 H-pyrazol-1-yl)-4-thiazolyl]-coumarins in good yields.
The Reactions of Dmso with Arylaldehydes in the Presence of Sodium Hydride
Authors: Shi Min , Shen Yu-Mei
Published: December 2009

Dimethyl sulfoxide (DMSO) reacted with arylaldehydes under basic conditions to afford sulfide 1, β-(benzyloxy)styrene 2 and dialkyl sulfoxide 3, while the reaction of benzophenone with DMSO gave 1,1-diphenylethylene 4, 1,1-diphenyl-2-methylthioethylene 5 and sulfoxide 6 at the same time under the same conditions.
Use of Liquid–Liquid Extraction with Neutral Organophosphorous Derivatives in the Estimation of (AuCl4-,H+) Interaction Coefficients
Authors: Alguacil Francisco José , Sastre Ana María
Published: December 2009

The liquid–liquid extraction of Au(III) from HCl solutions by a series of solvation extractants had been studied. The reagents are neutral organophosphorous derivatives such as phosphine oxides (Cyanex 921 and Cyanex 923) and phospholene derivatives (DMPL, EHMPL and NMPL). The distribution of gold between the aqueous and organic phases has been investigated under different variables. Experimental data were treated numerically in order to define the corresponding extracted species. Both experimental and numerical data were used to estimate the interaction coefficient between AuCl4- and H+ by using the specific interaction theory (SIT). Moreover, experimental data on the liquid–liquid extraction of HCl by these phosphorous derivatives were given.
H/D Isotope Effects in the Conductivity of Licl Aqueous Solutions in Sub and Supercritical State
Authors: Ismail Ibrahim M. , Numora Massao , Masuko Yoshio , Tomiyasu Hiroshi , Fujii Yasuhiko
Published: December 2009

The electrical conductances of LiCl in H2O and D2O solutions were measured in the temperature range 373 - 673 K at pressures up to 37.27 MPa, using a flow type electrical conductance cell.
Efficient Synthesis of 16α-Methyl Cyproterone Acetate
Authors: Sakee Uthai , Kongkathip Boonsong , Kongkathip Ngampong
Published: December 2009

An effective method for synthesis of 16α-methyl cyproterone acetate was accomplished starting from commercially available 16-dehydropregnenolone acetate in eight steps, 11.5% overall yield.
synthesis of Functionalised Polythiophenes and (2-Thienylcarbonyl)Pyrroles Via Conjugate Addition of (2-Thienylcarbonyl)Thioacetanilides to Nitroakenes
Authors: Bogdanowicz-Szwed Krystyna , Czarny Agnieszka
Published: December 2009

A convenient method is described for the synthesis of functionalised polythiophenes (6a-s) by treatment of (2-thienylcarbonyl)thioacetanilides with β-nitrostyrenes. Transformations of title products into pyrroles under acidic conditions are also discussed.
Electrophilic Substitution Reactions of Indoles with Carbonyl Compounds Using Ceric Ammonium Nitrate: A Novel and Efficient Method for the Synthesis of Di- and Tri-Indolylmethanes1
Authors: Ramesh C. , Ravindranath N. , Das Biswanath
Published: December 2009

Ceric ammonium nitrate (CAN) is used to catalyse the electrophilic substitution reactions of indoles with carbonyl compounds at room temperature to produce di- and tri-indolylmethanes in high yields.
Antitumour Polycyclic Acridines. Part 13.1 Synthesis of 2-Substituted 7H-Pyrido[4,3,2-kl]Acridines by Thermolysis of 9-(5-Alkyltriazol-1-yl)Acridines
Authors: Ellis Michael J. , Stevens Malcolm F. G.
Published: December 2009

Interaction of phosphoranylidene ketones with 9-azidoacridine in refluxing benzene affords 9-(5-substituted triazol-1-yl)acridines, which, on thermolysis in boiling diphenyl ether at 259 °C, yield 2-substituted 7 H-pyrido[4,3,2-kl] acridines in high yields. These tetracyclic acridines are less potent inhibitors of human tumour cells in vitro than their pentacyclic analogues.
An Efficient Synthetic Approach to the Aromatic Sesquiterpenoids via a Smi2-Promoted Construction of Quaternary Centre
Authors: Zhao Xue Zhi , Jia Yan Xing , Tu Yong Qiang
Published: December 2009

The total synthesis of the natural (±)-cuparene (1) and (±)-herbertene (2) has been carried out in eight steps from 2-cyclohexen-1-one (3) via a key quaternary carbon centre construction using a SmI2-promoted rearrangement of 2,3-epoxy alcohol.
Reactions of the Divalent Tin Compounds R2M, R = N(SiMe3)2 or CH(SiMe3)2 with Complexes of the Platinum Group Metals
Authors: Al-Allaf Talal A.K.
Published: December 2009

The stannylenes R2Sn, (R = N(SiMe3)2 or CH(SiMe3)2) insert into M–X bonds of complexes [MX2L2] to give new complexes of the general formula [MX(SnR2X)L2], (M = Pt, Pd, Ni; X = Cl, N3, NO2; L = PEt3, PBu3, DPPE). They also insert into Pt–Cl bonds of the bridged complexes [{Pt(μ-Cl)Cl(L)}2], to give the new bridged complexes[{Pt(μ-Cl)(SnR2Cl)(L)}2], (R = N(SiMe3)2, L = PEt3, PBu3, PMe2Ph, PPh3), in which the bridge remained uncleaved. In one reaction of the stannylene R2Sn, where R = CH(SiMe3)2, the bridged complex [{Pt(μ-Cl)(SnR2Cl)(PEt3)}2] undergoes cleavage followed by migration of Cl to give [PtCl(SnR2Cl)(η2-SnR2)(PEt3)]. Further, the bridged complex [{Pt(μ-Cl)(SnR2Cl)(PEt3)}2], (R = N(SiMe3)2), with the neutral ligands L’, (L’ = PPh3, pyridine or AsPh3), undergoes bridge cleavage to form the complexes [PtCl(SnR2Cl)(PEt3)(L’)]. The reaction of the stannylene R2Sn, (R = N(SiMe3)2) with the platinum(0) complexes [Pt(C2H4)(PPh3)2] and [Pt(COD)2], COD = 1,5-cyclooctadiene is described. The complexes obtained have been characterised mainly by 31P NMR spectroscopy and elemental analysis.
Preparation and structures of Dithia(1,3)Pyreno[3.3.n]-Metacyclophanes
Authors: Tanaka Kan , Tsuchiya Hiroyuki , Kakinaga Yoshiki , Hironaka Toru , Yamato Takehiko
Published: December 2009

Conformational studies are discussed of [3.3.2]metacyclophane 3b, which adopts a flexible anti-saddle conformation, in comparison with the corresponding [3.3.1]metacyclophane 3a, adopting a crown structure.
Chromone Studies. Part 14.1 Unprecedented Dimerisation of Chromone-3-Carbaldehyde-Derived Baylis–Hillman Adducts
Authors: Kaye Perry T. , Nchinda Aloysius T. , Sabbagh Liezel V. , Bacsa John
Published: December 2009

1,4-Diazabicyclo[2.2.2]octane (DABCO)-catalysed Baylis-Hillman reactions of selected chromone-3-carbaldehydes with methyl acrylate have been shown to afford mixtures of the expected Baylis-Hillman products and unprecedented dimeric derivatives. The Baylis–Hillman products, on heating at 80°C in the presence of DABCO, are converted to the corresponding dimers, the structures of which have been unambiguously established by NMR and X-ray crystallographic analysis. Electron-impact and electrospray MS data for the dimeric systems are discussed.
Cellulose Supported Tetraethylenepentamine as a Catalyst for the Knoevenagel Condensation
Authors: Li Yi-Qun , Zhou Mei-Yun , Xu Xin-Ming
Published: December 2009

The Knoevenagel condensation of carbonyl substrates with active methylene compounds proceeds smoothly in commercial 95% ethanol and catalysed by cellulose supported tetraethylenepentamine to afford the desired products of good purity in moderate to excellent yields.
The effect of a 4-Formyl and Hydroxymethyl Substituent on Steroid Biotransformations by Mucor Plumbeus
Authors: Hanson James R. , Hitchcock Peter B. , Kiran Ismail
Published: December 2009

Although steroids possessing a 4-formyl substituent undergo reduction on incubation with Mucor plumbeus, they do not appear to be substrates for efficient microbiological hydroxylation by this organism indicating that the structural requirements for these two enzyme systems are different.
Convenient synthesis of 5-(Arylamino(Alkylthio)Methylene)-2,2-Dimethyl-1,3-Dioxane-4,6-Diones and 2-Arylthio-4-Quinolones
Authors: Tang Jing , Huang Xian
Published: December 2009

Meldrum's acid reacted with an aryl isothiocynate and alkyl halides to afford the 5-(arylamino(alkylthio)methylene)-5-methylthio-2,2-dimethyl-1,3-dioxane-4,6-diones and the compounds underwent thermal cyclization to give the 4-2-arylthio-4(1 H)-quinolones
Synthesis and Crystal structure of 2,6-Bis(Imino)Phenoxy Copper Chloride
Authors: Han Lingqin , Cui Yong , Li Yan , Sun Wen-Hua , Du Jianlong , Li Jitai
Published: December 2009

Copper complexes bearing 2,6-bis(imino)phenoxy ligand were synthesised and characterised along with the single crystal X-ray diffraction analysis of complex 4.
Phase Transfer Catalysis Method of Synthesis of Benzyl- and Benzhydryloxyalkoxyalkynes
Authors: Matijos̆ka A. , Eicher-Lorka O. , Rastenytė L.
Published: December 2009

The synthesis of benzyl- and benzhydryloxyalkoxyalkynes and the determination of the influence of phase transfer catalyst, solvent and temperature on this nucleophilic substitution reaction is reported.
Baeyer Condensation in Chloroaluminate Ionic Liquid
Authors: Paul Aniruddha M. , Khandekar Amit C. , Khadilkar Bhushan M.
Published: December 2009

1- n-butylpyridinium chloroaluminate serves the dual purpose of a reaction medium and a Lewis acid catalyst for condensation of substituted benzaldehydes with N, N-dimethylaniline to obtain triarylmethanes (leuco bases) in good yields with significant reduction in reaction time and simplification of the workup process.
preparation of Liquid Substituted Benzoyl Peroxide Mixtures
Authors: Moorhoff Cornelis M. , Braybrook Carl
Published: December 2009

A series of alkyl substituted benzoyl peroxide mixtures were synthesised from two or three acid chloride combinations in aqueous sodium peroxide and butanone solutions to form liquid benzoyl peroxide mixtures.
The Microbiological Hydroxylation of 17-Chloroandrosta-4,16-Dien-3-One by Cephalosporium Aphidicola
Authors: Hanson James R. , Kiran Ismail
Published: December 2009

17-Chloroandrosta-4,16-dien-3-one is hydroxylated at C-6β, C-11α and C-15β by the fungus Cephalosporium aphidicola.
Solid-state Synthesis of Aryl 2-Nitrophenyl Ureas
Authors: Li Jing , Wang Yu-lu , Sun Ting
Published: December 2009

A simple and efficient solid-state synthesis for aryl 2-nitrophenyl ureas at room temperature is described for the first time.
AM1 Study of the Conformational Properties of Bicyclo[3.3.3]Undecane and its N-Bridgehead Derivatives
Authors: Azizian Javad , Fallah-Bagher-Shaidaei Hossain , Kefayati Hassan
Published: December 2009

AM1 semiempirical SCF MO calculations show that the BC conformation is the most stable form of bicyclo[3.3.3]undecane (1) and its N-bridgehead derivatives (2 and 3), whereas the corresponding BB conformations are calculated to be from 4.3 kcal/mol in (3) to 7.1 kcal/mol in (1) higher in energy.
The Stereochemistry of Osmylation of 2- and 17-Methylene-5α-Androstanes
Authors: Al-Fouti Khaled , Hanson James R.
Published: December 2009

Osmylation of 2-methylene-5α-androstan-17-one has been shown to afford the 2α-hydroxy-2β-hydroxymethyl derivative whilst 3β-hydroxy-17-methylene-5α-androstane gives the 17α-hydroxy-17β-hydroxymethyl derivative; the facial selectivity of these reactions is discussed.
Experimental and Computational Studies on the Electronic Spectral properties of Some 3-Hydroxy, 4-Arylazo [(Benzylidene) Dithio] Diacetic Acids
Authors: Gohar Gamal A.
Published: December 2009

The correlations between the electronic spectral properties of the title azo compounds and organic solvent parameters have been analysed also, their electronic transition energies have been calculated, using a semi empirical approach and the results were compared with the experimental measurements.
First Total Synthesis of (±) Maackin
Authors: Yang Yi , Bie Pingyan , Zhang Chenglu , Pan Xinfu
Published: December 2009

(±) Maackin 6 was synthesised from the readily available material 3,5-dihydroxybenzoic acid and 3,4-dihydroxy-benzaldehyde, using a coupling reaction as a key step.
Preparation of Zinc Oxide Films by a Humid Air Plasma
Authors: Abdessalem M. , Bellakhal N. , Dachraoui M.
Published: December 2009

The surface of zinc metal exposed to a humid air plasma gives rise to an oxide layer which was identified by the linear sweep voltammetry technique. The quantity of zinc oxide (ZnO) layer formed increases with exposure time and the humid air gas flow. The humid air plasma treatment of a zinc surface can be proposed as a new technique to prepare zinc oxide.
Efficient Conversion of Epoxides to Episulfides with Thiourea Catalysed with Cerium (IV)
Authors: Kazemi F. , Kiasat A.R.
Published: December 2009

Efficient conversion of epoxides into episulfides with thiourea in the presence of ceric ammonium nitrate (CAN) as catalyst and under mild and non-aqueous conditions is reported; this conversion was performed under both conventional heating and microwave conditions and distinct rate enhancement was observed under microwave irradiation.
Direct Measurement of the Photochromism Kinetics of Salicylideneamines in Solid State
Authors: Zhao Jianzhang , Zhao Bing , Xu Weiqing , Liu Juzheng
Published: December 2009

A method for the study of photochromism kinetics of salicylideneamines in the solid state with fluorescence changes as the probe was described. This can be used to quantitatively evaluate the photochromism of some solid photochromic materials.
Coumarin Synthesis via Knoevenagel Condensation in Moisture Stable Room Temperature Ionic Liquids
Authors: Bao Weiliang , Wang Zhiming , Li Yuxia
Published: December 2009

Several coumarins have been synthesised by Knoevenagel condensation in the piperidine/HOAc/moisture stable room temperature ionic liquid ([Emim]+BF4- referring to structure) system at room temperature; the yield of the reaction is good and the reaction medium can be recycled.
A Stereoselective Synthesis of (E)-Allylic Alcohols Via the Hydromagnesiation of Alkynylsilanes
Authors: Cai Mingzhong , Peng Chunyun , Zhao Hong , Hao Wenyan
Published: December 2009

Hydromagnesiation of alkynylsilanes 1 gives ( Z)-α-silylvinyl Grignard reagents 2, which are reacted with aldehydes or ketones to afford ( Z)-β-silyl allylic alcohols 3 in high yields; intermediates 3 can undergo the desilylation reaction in the presence of anhydrous KF to give ( E)-allylic alcohols 4 in good yields.
The Dinitration of Dimethylacetanilides
Authors: Medina Inmaculada C. Rodriguez , Hanson James R.
Published: December 2009

The orientation of dinitration of the dimethylacetanilides has been examined by 1H NMR methods and a possible enhancement of the hyperconjugative influence of a methyl group has been considered as an additional factor augmenting the effect of the steric inhibition of resonance on the orientation of substitution.
Highly Stereoselective Synthesis of trans-Diaryl Epoxides Via Semi-Stabilised Telluronium Ylide
Authors: Wang Lei , Huang Zhizhen
Published: December 2009

Benzyldibutyltelluronium bromide can react with LDA to form benzyldibutyltelluronium ylide in situ, followed by the reaction with aromatic aldehydes, developed a novel method for the stereoselective synthesis of trans-diaryl epoxides.
The Dimerisation of 5,6-Dimethoxy-Indene
Authors: Fraga Braulio M. , Cabrera Inmaculada
Published: December 2009

The reaction of 5,6-dimethoxy-indanol with acids or with triphenylphosphine-carbon tetrachloride afforded several dimeric compounds; in the dimerisation of 5,6-dimethoxy-indene with SiO2–AgNO3 only a single dimer was obtained.
Utilisation of Enols of Mono- and Dicarbonyls Compounds in 1,3-Dipolar Cycloaddition Reactions
Authors: Kurkowska Joanna , Zadrożna Irmina
Published: December 2009

2-Isoxazolines were obtained from substituted enols or their ester or ether derivatives in 1,3-dipolar cycloaddition reactions with aliphatic or aromatic nitrile oxides.
A Convenient Route to α,β-Unsaturated Aldehydes Based on Polymer-Supported α-Selenoaldehydes
Authors: Sheng Shou-Ri , Wu Lu-Ling , Huang Xian
Published: December 2009

Polystyrene-supported (4-phenylseleno)morpholine was synthesised and could be used as an efficient α-selenenylating agent for saturated aldehydes; subsequent oxidation of polystyrene-supported α-selenoaldehydes and the products from the Wittig reaction of them with chloromethylidenetriphenylphosphorane with an excess of 30% hydrogen peroxide at room temperature afforded α,β-unsaturated aldehydes in good yields and purities.
Tert-BuOK/BuLi-Induced Facile Cyclodehydrogenation of Diphenyl Sulfide to Dibenzothiophene
Authors: Ohgaki Hirotaka , Mitsuhashi Hirokazu , Suzuki Hitomi
Published: December 2009

Attempted double ortho-lithiation of diphenyl sulfide using two equivalents of butyllithium in the presence of potassium tert-butoxide in diethyl ether-THF at room temperature under argon resulted in facile cyclodehydrogenation to afford dibenzothiophene in moderate yield.
Stereoselective Synthesis of 1,3-Enynylstannanes via a Palladium Catalysed Cross-Coupling Reaction of (E)-α-Iodovinylstannanes
Authors: Cai Mingzhong , Zhao Hong , Ye Hongde , Xia Jun , Song Caisheng
Published: December 2009

( E)-α-Iodovinylstannanes undergo a direct coupling reaction with terminal alkynes in the presence of Pd(PPh3)4 and CuI in pyrrolidine at room temperature to give 1,3-enynylstannanes in good yields.
Synthesis of Anti-[2.2](2-Phenylthiazolophane): A New Heterocyclic Biphenylophane
Authors: Mashraqui Sabir Hussain , Kumar Sukeerthi
Published: December 2009

Synthesis of a heterocyclic variant of the biphenylophanes, namely anti-[2.2](2-phenylthiazolophane) (1), is described via a sequence involving the pyrolysis of an intermediate bis-lactone (8). Dynamic 1H NMR analysis revealed both the bis-lactone 8 and the target heterophane 1 to be conformationally mobile on the NMR time scale at temperatures down to −55 °C.
An Efficient Solid–Phase Synthesis of 3-Carboxycoumarins Based on a Scaffold–Polymer-Bound Cyclic Malonic Ester
Authors: Tang Jing , Huang Xian
Published: December 2009

The condensation of substituted o-methoxybenzaldehydes or o-hydroxybenzaldehydes with a resin-bound cyclic malonic ester 3 afforded the resin 4 without catalyst. Cyclisation of the resin 4 in sulfuric acid formed 3-carboxycoumarins in good yield and excellent purity.
Synthesis and Characterisation of a Series of New Aza-Crown Ethers
Authors: Hu Xiao Li , Lu Guang Nong , Chen Lei , Yang Ru Dong
Published: December 2009

A series of aza-crown ethers were synthesised by the in situ reduction of Schiff base crown ethers that were obtained by the condensation of a dialdehyde with a diamine in methanol solution. The aza-crown ethers were characterised by elemental analysis, FAB-MS, IR, and 1H NMR. They were obtained in good yields.
A Novel Method for Synthesis of β-Telluroesters(and Nitriles)
Authors: Tian Fengshou , Zhang Songlin , Wang Yulu
Published: December 2009

The Te-Te bond in ditellurides was reduced by the Zn/ZrCl4 system in THF to produce tellurium anions, which then react with α,β-unsaturated esters and α,β-unsaturated nitriles to give β-telluroesters (and nitriles).
Intermolecular Reductive Coupling Cyclisation of 1,1-Diaryl-2,2-Dicyanoethylenes with Aldehydes or Ketones to Synthesise Polysubstituted 2, 3-Dihydrofurans and Cyclopentenylamines Promoted by Samarium Metal in DMF
Authors: Liu Yongjun , Zhang Yongmin
Published: December 2009

The intermolecular reductive coupling and cyclisation of 1,1-diaryl-2,2-dicyanoethylenes with carbonyl compounds promoted by metallic samarium in DMF afforded functionalised 2,3-dihydrofurans and cyclopentenylamines.
Ruthenium-Catalysed Transfer Hydrogenation of Aromatic Aldehydes with Dioxane under Koh: Assistance of Cannizzaro Reaction
Authors: Kim Bok Tae , Cho Chan Sik , Kim Tae-Jeong , Shim Sang Chul
Published: December 2009

Aromatic aldehydes are reduced to the corresponding alcohols in dioxane at 80°C in the presence of a catalytic amount of a ruthenium catalyst together with KOH in moderate to good yields.
Synthesis of α,α,-Bis(Substitutedbenzylidene) Cycloalkanones by a Grinding Method
Authors: Wang Shu-Xiang , Li Ji-Tai , Geng Li-Jun
Published: December 2009

KF-Al2O3 catalyses the crossed aldol condensation of various aromatic aldehydes with cycloalkanones, giving corresponding α,α, -bis(substitutedbenzylidene)cycloalkanones under solvent free conditions by a grinding method at room temperature.
The Stereospecific Preparation of (Z)-α-Stannyl-1-Alkenylphosphonates as Precursors of Stereodefined α-Substituted Vinylphosphonates
Authors: Xiong Zheng-Chang , Huang Xian
Published: December 2009

The radical hydrostannation of 1-alkynylphosphonates gives the ( Z)-α-stannyl-1-alkenylphosphonates 2 stereoselectively; 2 can be transformed into α-iodo-1-alkenylphosphonates and α-substituted vinylphosphonates with retention of configuration.
A Concise Synthesis of Pyrimidinophanes from 6-Aryl-5-Cyano-2-Thiouracil
Authors: Upadhyay D.N. , Agarwal Nidhi , Goel Atul , Ram Vishnu Ji
Published: December 2009

A convenient synthesis of 2,3- and 2,4-pyrimidinophanes (3,5,6) has been described from 6-aryl-5-cyano-2-thiouracils (1a–c). A reaction of 2-thiouracil with dibromomethane produced 2a–c, which on further interaction with dihaloalkane under basic condition produced 2,3-pyrimidinophanes (3a,b). Halogenation of 2a,c with POCl3 led to yield respective chloropyrimidines (4a,b), which on further reaction with diaminoalkane and 1,4-phenylenediamine separately yielded 2,4-pyrimidinophanes (5a–d and 6a,b).
Synthesis of New Thiopyridines, Thienopyridines, Pyridothienopyrimidines and Pyranothienopyridines with Anticipated Biological Activity
Authors: Bakhite Etify A. , Abdel-Rahman Abdu E. , Al-Taifi Elham A.
Published: December 2009

(5-Acetyl-4-aryl-3-cyano-6-methylpyridin-2-ylthio)acethydrazides (4a,b), 5-acetyl-3-amino-4-aryl-6-methylthieno[2,3- b]pyridine-2-carbohydrazides (5a,b) and 5-acetyl-3-amino-6-methyl-4-phenylthieno[2,3- b]pyridine-2-carboxylic acid (13) were synthesised and used as key intermediates in the synthesis of the target compounds.
Phosphomolybdic Acid, an Efficient and Practical Reagent for the Oxidative Deprotection of Trimethylsilyl Ethers to Corresponding Carbonyl Compounds
Authors: Jin Tong-Shou , Li Yan-Wei , Sun Guang , Song Xin-Ru , Li Tong-Shuang
Published: December 2009

The oxidative deprotection of trimethylsilyl ethers to corresponding carbonyl compounds with phosphomolybdic acid (PMA) in refluxing toluene gives excellent yields.
A Facile and Rapid Method for the Synthesis of Novel Pyrazolyl Thiosemicarbazones
Authors: Liu Ying , Ren Jun , Jin Gui-Yu
Published: December 2009

Sixteen novel thiosemicarbazone compounds 3a–q were obtained under mild conditions by a simple route. Their structures were confirmed by IR, 1H NMR, MS and elemental analysis. Bioassay showed some of the products to have fungicidal activity.
Zinc/Ammonium Formate: A New Facile System for the Rapid and Selective Reduction of Oximes to Amines
Authors: Abiraj K. , Gowda D. Channe
Published: December 2009

Various oximes, both aldoximes and ketoximes, are selectively reduced to corresponding amines employing low cost zinc dust and ammonium formate despite presence of other functional groups such as halogens, –OH, –OCH3, –COOH, –CN, > C = C < and –CH3.
Nitration and Bromination of N-(Dimethylphenyl)Methane-Sulfonamides
Authors: Al-Khafaji Sarah , Cardinale Nina , Hanson James R.
Published: December 2009

The orientation of the products of nitrosation: nitration and bromination of the methanesulfonamides of the six isomeric dimethylanilines have been established by 1H NMR nuclear Overhauser experiments.
Silica Gel-Supported Phosphotungstic Acid (PTA) Catalysed Acylation of Alcohols and Phenols with Acetic Anhydride under Mild Reaction Conditions
Authors: Jin Tong-Shou , Xiao Jin-Chong , Wang Zhen-Hua , Li Tong-Shuang
Published: December 2009

Phosphotungstic acid, which is commercially available, practically and efficiently catalyses the acylation of a series of alcohols and phenols with acetic anhydride at room temperature or at refluxing temperature.
Enzymatic Hydrolysis of 4′-(1-Chloro-2-Acetoxyethyl)-Benzo-15-Crown-5-Ether and 4′-Acetoxyethyl-Benzo-15-Crown-5-Ether; a Facile Synthesis of the Optically Active Chlorohydrin Analogue Incorporating Crown Ether
Authors: Kijima Tatsuro , Moriya Takanori , Izumi Taeko
Published: December 2009

Optically active chlorohydrin analog incorporating crown ether was synthesised by enzymatic hydrolysis using Candida Antarctica lipase in high enantiomeric excess.
Photocatalytic Activity of TiO2 Synthesised by the Sol-Gel Method
Authors: Yamazaki Suzuko , Hayashi Tomoko
Published: December 2009

The effects of alkoxides, solvents, and the peptization and dialysis procedures in the sol-gel synthesis of TiO2 on the degradation rates of ethylene were investigated.
An Efficient Synthesis of the Plant Hormone Abscisic Acid
Authors: Hanson James R. , Uyanik Cavit
Published: December 2009

An efficient stereospecific synthesis of the plant hormone ( RS)-abscisic acid from the readily available 4-oxoisophorone, trimethylsilylacetylene and ethyl but-2-ynoate, is described.
The Oxidative Bromination and Iodination of Dimethylacetanilides
Authors: Medina Inmaculada C. Rodriguez , Hanson James R.
Published: December 2009

The oxidative bromination and iodination of the six dimethylacetanilides have been examined; whereas bromination of 2,4-dimethyl- and 2,6-dimethylacetanilides using potassium bromide, sodium tungstate and peracetic acid gave predominantly the 6- and 4-bromo compounds respectively, the 5- and 3-iodo compounds were obtained using hydrogen iodide and peracetic acid.
Nickel and Palladium Catalysed Reaction of Triethyl Phosphite with Aryl Halides under Microwave Irradiation
Authors: Villemin Didier , Elbilali Abdelghani , Siméon Fabrice , Jaffrès Paul-Alain , Maheut Géraldine , Mosaddak Mahjouba , Hakiki Abdelhack
Published: December 2009

Diethyl aryl phosphonates are efficiently and rapidly obtained from halides and triethyl phosphite without solvent. The reaction was catalysed by NiCl2 or PdCl2 (10%) under focussed microwave radiation.
Gem-diallylation of Acyl Azides with Allylsamarium Bromide Under Mild Conditions
Authors: Li Jian , Liu Yongjun , Zhang Yongmin
Published: December 2009

Allylsamarium bromide reacts with acyl azides to give the corresponding gem-diallylation products, 4-alkyl-1,6-heptadienes-4-ols (3), in good to excellent yields. This novel reaction proceeds readily within a few minutes at room temperature.
Clerodendrone, a Novel Hydroquinone Diterpenoid from Clerodendrum Indicum
Authors: Ravindranath N. , Ramesh C. , Kishore K. Hara , Murty U.SN. , Das Biswanath
Published: December 2009

Chemical investigation of Clerodendrum indicum has resulted in the isolation of clerodendrone, a new member of hydroquinone diterpenoids (which are rare in the investigated family, Verbenaceae). The compound was characterised from its spectral (1D and 2D NMR) data and chemical reactions and was found to contain an uncommon structural pattern with beta-methyl dihydrofuran moiety.