bluuebunny/crossref_metadata_2025 huggingface dataset:
Environmentally Friendly Catalysis Using Supported Reagents: Catalytic Epoxidation with Hydrogen Peroxide Mediated by Iron(II) Ions Immobilised on γ-alumina
Authors: Monfared Hassan Hosseini , Ghadimi Mitra
Published: December 2009

A simple heterogeneous catalyst based on supporting iron(II) ions on γ-alumina was developed and successfully applied to the selective epoxidation of olefins with 35% aqueous H2O2 as an oxygen donor in CH3CN.
Lipase Catalysed Preparation of Optically Active α-Phenylethanol and the Related Substrates under Solvent free Condition
Authors: Mamaghani Manouchehr , Tabatabaeian Khalil , Bahrami Behnaz
Published: December 2009

Porcine pancreatic lipase (PPL) has been used as a chiral catalyst for the kinetic resolution of α-phenylethanol and the related derivatives (p-R'C6H4CH(OH)CH3, R'= CH3, MeO, Cl, Br) under solvent free conditions, with excellent enantioselectivities (ee's 81–98.5%).
Facile Synthesis of Bivalent Ligand-Based Phosphoramidates of AZT
Authors: Xiao Qiang , Sun Jing , Ju Yorg , Zhao Yu-fen , Cui Yu-xin
Published: December 2009

A series of bivalent ligand-based phosphoramidates of AZT were synthesised in a facile way using a modified Atherton-Todd reaction.
A Novel Reductive Cyclisation of o-Nitrochalcones Promoted by Low-Valent Titanium: An Access to 2-Arylquinolines and 5,6-Dihydrobenz[c]Acridines
Authors: Shi Daqing , Rong Liangce , Wang Juxian , Zhuang Qiya , Wang Xiangshan , Tu Shujiang , Hu Hongwen
Published: December 2009

The intramolecular reductive cyclizations of o-nitrochalcones(1) induced by the TiCl4/Zn system were studied; 2-arylquinolines(2) and 5,6-dihydrobenz[c]acridines(4) were obtained in reasonable yields at room temperature conditions.
Convenient Transformation of Thiocarbonyl to Carbonyl Group Using Benzyltriphenylphosphonium and n-Butyltriphenylphosphonium Peroxodisulfates
Authors: Mohammadpoor-Baltork Iraj , Sadeghi Majid M. M. , Esmayilpour Karim
Published: December 2009

Benzyltriphenylphosphonium and n-butyltriphenylphosphonium peroxodisulfates are stable and easily prepared oxidising agents. These reagents are able to convert different thioamides and thioureas to their oxygen analogues in good to excellent yields. Thiono esters are also transformed to esters in high yields. Thioketones such as thiobenzophenone and thiofluorenone are converted to their ketones in high yields while, 4-nitrothiobenzophenone, 2-aminothiobenzophenone and 4-chlorothiobenzophenone remained intact in the reaction mixture.
First Enantioselective Synthesis of Rhaphidecursinol A
Authors: Ren Xinfeng , She Xuegong , Peng Kun , Su Ying , Xie Xingang , Pan Xinfu
Published: December 2009

The enantioselective synthesis of Rhaphidecursinol A was reported for the first time and the absolute configuration of Rhaphidecursinol A was confirmed.
A New Naturally Occurring Xanthone Bearing Rare Oxygenation Pattern from Hoppea Fastigiata
Authors: Brahmachari Goutam , Gorai Dilip , Mondal Sadhan , Gangopadhyay Arindam , Chatterjee Dipak
Published: December 2009

A new xanthone 1,3,6-trihydroxy-8-methoxyxanthone, was isolated from chloroform extract of the whole plant of Hoppea fastigiata and the structure was elucidated on the basis of spectroscopic and chemical studies. The xanthone molecule has an unusual oxygenation pattern (1,3,6, 8) and is of chemotaxonomic interest.
One-Pot Construction 3,4-Dihydropyrimidin-2(1H)-Ones Catalysed by Samarium(III)
Authors: Xu Hui , Wang Yan-Guang
Published: December 2009

An efficient synthesis of dihydropyrimidin-2(1 H)-ones using samarium(III) nitrate hexahydrate as a catalyst from an aldehyde, 1,3-dicarbonyl compounds and urea under solventless conditions is described. Compared with the classical Biginelli reaction, the yields of this protocol increased from 20–50% to 78–98% while the reaction time was significantly shortened from 18 h to 15–30 min.
Alternative Procedure for the Synthesis of (±)-Forskolin Precursor
Authors: Banerjee Ajoy K. , Cabrera Elvia V. , Ng Po S. Poon , Vera William J. , Laya Manuel S.
Published: December 2009

A concise synthesis of the enone (11), a potential intermediate for (±)-forskolin (12) synthesis is described.
A Convenient Synthesis of 5-Benzylidenethiazolidine-2, 4-Diones under Microwave Irradiation without Solvent
Authors: Yang De-Hong , Chen Zhen-Chu , Chen Song-Ying , Zheng Qin-Guo
Published: December 2009

A series of 5-benzylidenethiazolidine-2,4-diones was synthesised by the Knoevenagel condensation of aromatic aldehydes with thiazolidine-2,4-dione in the presence of catalytic amounts of piperidine and acetic acid under microwave irradiation without solvent in good yields.
A Partition Equilibrium Study of Benzene/Water/Sds-Butanol Oil/Water Microemulsions
Authors: Sarma Surashree , Gohain Biren , Dutta Robin K.
Published: December 2009

Partition of a sulfonephthalein dye, viz., phenol red, between the pseudophases in oil/water benzene/water/SDS-butanol microemulsions has been studied by UV-VIS spectroscopy and the partition equilibrium constants have been correlated with the microstructure of microemulsions and effect of cosurfactant.
Microwave Irradiation for the Oxidative 1, 3-Dipolar Cycloaddition of Aldehyde Phenylhydrazones and Methyl Acrylate by (Diacetoxy)Iobenzene
Authors: Xia Min
Published: December 2009

Methyl 1-phenyl-3-aryl-2-pyrazolinyl-5-carboxylates were rapidly synthesised by a 1,3-dipolar cycloaddition in good to excellent yields with complete regioselectivity under microwave irradiation.
Application of Flory's Statistical Theory for the Estimation of Internal Pressure of the Liquid Mixtures
Authors: Pandey J. D. , Sanguri V. , Bhatt Bishan Datt
Published: December 2009

Flory's Statistical Theory has been employed for the evaluation of internal pressure of liquid mixtures at varying conditions. The method used for the evaluation does not use any empirical relation, unlike the approaches of previous workers. The computed values have been compared against the values obtained from thermodynamic relation taken as an experimental method. To the best of our knowledge, the present approach has not been employed previously by any worker. The excellent agreements between the computed and experimental values prove the applicability of this approach for the evaluation of internal pressure in liquid mixtures.
Formation and Crystal Structures of 9-Methylanthracene Photodimer and Lepidopterene
Authors: Liu Qing-Xiang , Song Hai-Bin , Xu Feng-Bo , Li Qing-Shan , Zeng Xian-Shun , Leng Xue-Bin , Zhang Zheng-Zhi
Published: December 2009

The 9-methylanthracene photodimer (6) and lepidopterene (7) were prepared by a photo-dimerisation reaction of 1-(9-anthracenylmethyl)-3-ethylimidazolium iodide (1) or α, α'-di[1-(9-anthracenylmethyl) imidazolium]- p-xylene dibromide (2). Compound 6 is derived from the head-tail [4+4] cycloaddition of two molecular 9-methylanthracenes, and the butterfly-shaped compound 7 is formed via the 9-methyleneanthracene radical in a two steps precess. The single crystal structure of 6 was determined by X-ray diffraction analysis. The changes of luminescent intensities of compounds 1, 2 and 7 are reported.
Synthesis and Infrared Spectroscopic Investigation of Hydrogen-Bonded Complexes between 1,8-Bis(Dimethylamino)Naphthalene and 2,6-Dihydroxynaphthalene in 2:1 and 1:2 Ratios in the Crystalline forms and in Acetonitrile
Authors: Habeeb Moustafa M. , Kharaba Mohamed A.
Published: December 2009

Two hydrogen bonded complexes between 1,8- bis(dimethylamino) naphthalene (DMAN) and 2,6-dihydroxynaphthalene (DHN) in 2:1 and 1:2 ratios were synthesised and studied using FTIR the spectra of the solid 2:1 complex revealed incomplete protonation of DMAN with the appearance of two broad absorptions representing ν(NHN)+ and ν(OHN) in the ranges 700–400 and 1600–700 cm−1 respectively, while the 1:2 complex indicated the complete protonation of DMAN with the appearance of two broad absorptions representing ν(NHN)+ and ν(OHO-) in the ranges 700–400 and 1600–700 cm−1 respectively. On the other hand the IR spectra in acetonitrile indicated that the 1:2 complex is more stable than the 2:1 complex.
The X-ray Crystal Structures of Ambraketal and 8-Epi-Ambraketal
Authors: Gray Christopher A. , Davies-Coleman Michael T. , Caira Mino R. , Nathanson Carole A. , Wisch Gregory A.
Published: December 2009

The crystal structures of ambraketal and 8- epi-ambraketal, synthesised in five steps from (–)-sclareol, are reported.
Autoxidation of Isotachysterol: Formation of New Epoxides
Authors: Jin Xiaoling , Yang Xinping , Yang Li , Liu Zhong-Li , Zhang Fa , Wang Jinxin , Li Ying
Published: December 2009

Autoxidation of isotachysterol under atmospheric oxygen in the dark at ambient temperature produces two new epoxides: ( 3S,5R)- and ( 3S,5S)-5,10-epoxy-isotachy sterols.
Synthesis and Structure of Copper(II) Calix[4]Arene Tetraimidazole Complex
Authors: Cao Yu-Dong , Zheng Qi-Yu , Chen Chuan-Feng , Huang Zhi-Tang
Published: December 2009

A copper(II) complexes of calix[4]arene tetraimidazole (CTI) ligand has been prepared to mimic the active site of copper metalloproteins.
A Study on the Sulfonation of Aromatic Amines with Sulfuric Acid under Microwave Irradiation
Authors: Li Hui-Zhang , Xiao Li-Wei , Li Hong-Ya , Wang Kai-Fang , Li Xu
Published: December 2009

The sulfonation of aromatic amines with high yields, simple operations and short reaction time has been studied under microwave irradiation in solvent-free conditions.
Group 6 Metal Carbonyl Complexes Containing the 3,5-Dimethyl-1,2,4-Triazole Ligand
Authors: Yang Zhi , Tang Liang-Fu , Ma Xiao-Li , Wang Ji-Tao , Wu Jun-Sheng , Wang Li-Sheng
Published: December 2009

Three complexes, [M(CO)5Tz], have been synthesised by the photochemical reaction of 3,5-dimethyl-1,2,4-triazole (Tz) with [M(CO)6] (M = Cr, Mo and W). The crystal structure of [Cr(CO)5Tz] has been characterised by X-ray analysis, and the 4 H-tautomer of the triazole ligand is observed in this complex in the solid state.
A Mild and Efficient Method for the Mononitration of Aromatic Compounds by Cerium (III) Ammonium Nitrate in Acetic Anhydride
Authors: Tanemura Kiyoshi , Suzuki Tsuneo , Nishida Yoko , Satsumabayashi Koko , Horaguchi Takaaki
Published: December 2009

A mild and efficient method for the mononitration of aromatic and olefinic compounds is described. This method is especially useful for active substrates.
A Practical and Improved Method for the Preparation of Trimethylsilyl Cyanide Catalysed by PEG400 and Zinc Iodide
Authors: Cao Yu-Qing , Du Yun-Fei , Li Ji-Tai
Published: December 2009

The useful synthetic reagent trimethylsilyl cyanide was readily prepared in high yield by the cyanation of trimethylchlorosilane with potassium cyanide in the presence of PEG400 and zinc iodide under stirring at room temperature or ultrasonic radiation.
A New Antitumour Sesquiterpene from the Euonymus Nanoides
Authors: Wang Hong , Tian Xuan , Pan Yuanjiang
Published: December 2009

A new (1) and a known (2) β-dihydroagarofuran sesquiterpene polyol ester were isolated from Euonymus nanoides and they showed antitumor activities in vitro.
Photochromic Behaviour of N-Arylsulfonyl Peptides
Authors: Hill Roger R. , Moore Sharon A. , Roberts David R.
Published: December 2009

Deep, persistent, but structurally sensitive photoyellowing observed in photochemical studies of a wide range of arylsulfonyl derivatives of amines, amino acids and peptides can be attributed to a novel kind of photochromism in which intramolecular photoinduced electron transfer promotes the formation of a metastable cyanine-type chromophore involving sulfur d-orbitals.
Synthesis of Functionalised Pyrimidin-2-One Derivatives
Authors: El-Nabi Hisham A. Abd , El-Din A. M. Nour , Fahmi Magda S.
Published: December 2009

Pyrimidin-2-one and pyrimidine-2-thione derivatives 5 and 7 are obtained in 40-65% and 60-75% yields when 4-ethoxycarbonyl-5-phenylfuran-2,3-dione (1) react with semicarbazones, thiosemicarbazones 2a–f, urea and thiourea derivatives 6a–d through loss of water and carbon dioxide.
A Facile and Simple Method for the Reduction of N-protected Amino Acids and Peptides to the Corresponding Alcohols
Authors: Srivastava Tumul , Srivastava Tushar K. , Haq W. , Katti Seturam B.
Published: December 2009

A practical and chemoselective method for the reduction of N-protected amino acids and peptides including carboxylic acids to their corresponding alcohols is outlined.
A Facile Synthesis of Dihydronaphthopyrans
Authors: Ranade Anup A. , Joseph Augustine R. , Kumbhar Virendra B. , Paradkar Madhusudan V.
Published: December 2009

Efficient syntheses of naturally occurring linear dihydronaphthopyran (6a) and its angular analogues (3b and 4), from appropriate ortho-methoxynaphthaldehydes, have been described.
(E)-α-Iodovinylstannanes as Convenient Precursors for Stereoselective Synthesis of Trisubstituted Alkenes
Authors: Cai Mingzhong , Ye Hongde , Zhao Hong , Song Caisheng
Published: December 2009

Based on the different reactivities of iodo-groups and tributylstannyl groups, ( E)-α-iodovinylstannanes can undergo sequential cross-coupling reactions in the presence of a palladium(0) catalyst to form two carbon-carbon bonds to the same olefinic carbon leading to trisubstituted alkenes stereoselectively.
The Biotransformation of 5β-Methyl-19-Norpregn-9-Enes by Cephalosporium Aphidicola
Authors: Hanson R. James , Hitchcock B. Peter , Yildirim Kudret
Published: December 2009

The biotransformation of 3β-hydroxy-5β-methyl-19-norpregn-9-en-20-one and the corresponding 3,20-dione by Cephalosporium aphidicola has been shown to give 10β-hydroxy-5β-methyl-19-norpregn-9(11)-ene-3,20-dione and related products.
Nitration of the 6-Methyl-1,3,5-Triazine Derivatives, 6-Methyl-1,3,5-Triazine-2,4(1H, 3H)-Dione and 2,4-Dimethoxy-6-Methyl-1,3,5-Triazine
Authors: Bellamy Anthony J. , Latypov Nikolaj V. , Goede Patrick
Published: December 2009

Nitration of 6-methyl-1,3,5-triazine-2,4(1 H, 3 H)-dione (III) gave 2,4,6-trihydroxy-1,3,5-triazine (cyanuric acid, V) and tetranitromethane, whilst nitration of 2,4-dimethoxy-6-methyl-1,3,5-triazine (IV) gave 2,4-dimethoxy-6-trinitromethyl-1,3,5-triazine (VII) or a furazan N-oxide derivative (IX), depending upon the nitration medium.
The Hydroxylation of Some Longifolanes by Mucor Plumbeus
Authors: Arantes Simone Fontes , Hanson James R. , Hitchcock Peter B.
Published: December 2009

The microbiological hydroxylation of 15-hydroxylongifolane and 15-hydroxyisolongifolane by Mucor plumbeus afforded the 10β-hydroxy derivatives whilst 10-oxolongifolane gave the 3α- and 4α-hydroxylated products. The structures of the metabolites were established by X-ray crystallography.
Guest-Dependent Organic Photochromism of 7-Bromo-1,4,8-Triphenyl-2,3-Benzo[3.3.0]Octa-2,4,7-Trien-6-One in the Solid State
Authors: Tanaka Koichi , Watanabe Tomoyuki , Kato Masako
Published: December 2009

Inclusion crystals of 7-bromo-1,4,8-triphenyl-2,3-benzo[3.3.0]octa-2,4,7-trien-6-one (1a) and its chloro-derivative (1b) showed a reversible colour change from yellow to green on exposure to UV-light, and this depends on the guest molecules present. The crystal structures of the inclusion complex were determined by X-ray analysis.
Catalytic Oxidation of Tetrahydrofuran in the Presence of 14-Membered Hexaaza Macrocyclic Copper (II) Complexes with Hydrogenperoxide
Authors: Salavati-Niasari M. , Najafian H.
Published: December 2009

Copper (II) Complexes of the 14-membered hexaaza-macrocycles; 1, 8-dimethyl-; 1, 8-diethyl-; 1, 8-dipropyl-; 1, 8-dibutyl iso-; 1, 8-dibutyl sec- and 1, 8-dibenzyl- 1, 3, 6, 8, 10, 13-hexaazacyclotetra decane ([Cu{R2[14]aneN6}](ClO4)2) catalysed efficiently the selective oxidation of tetrahydroforan into the corresponding γ-butyrolactone and a small amount of tetrahydrofuran-2-ol and 4-hydroxybutyraldehyde, using dil. H2O2 as the oxidant. The conversion of this catalytic oxidation process can reach 98.6% when [Cu{(Benzyl)2 [14] ane N6}](ClO4)2 is used.
Theoretical and Experimental Investigations of Vanadium (III) Oxychloride
Authors: Allaf Abdul W.
Published: December 2009

An attempt has been made to produce vanadium (III) oxychloride, (OVCl) by an on-line process for the first time using vanadium oxytrichloride, VOCl3 as a precursor passed over heated silver wool at about 930°C. The vapour products have been characterised by their infrared spectra; values for ν3 of 1010 cm−1 (O=V stretch) and for ν2 of 420 cm−1 (V-Cl stretch) were obtained. Ab initio self-consistent-field molecular orbital calculations were performed to determine the geometry, total energy and the vibrational frequencies of OVCl.
Synthesis and Spectroscopic Characterisation of Some Neutral Tetracoordinated Germanium (IV) Alkoxyalkanolates
Authors: Pathak Madhvesh , Bohra Rakesh , Mehrotra Ram C.
Published: December 2009

Compounds of the type, [Ge(OPri)4-n(OCH2CH2OR)n], (where R = Me, Et, n-Bu and n = 1-4) have been synthesised in high yields by the interactions of germanium tetraisopropoxide with alkoxyalkanols (HOCH2CH2OR) in different stoichiometries in refluxing anhydrous benzene, and are monomeric in refluxing benzene. All these compounds can be purified by distillation under reduced pressure. IR and NMR (1H and 13C) spectral studies indicate a tetrahedral geometry around the germanium atom.
Synthesis and Crystal Structure of 3-[4-Diarylmethyl-1-Oxophthalazin-2(1H)-Yl]Propanenitriles
Authors: Kundu Sandip Kumar , Mazumdar Pooja Anjali , Das Amit Kumar , Bertolasi Valerio , Pramanik Animesh
Published: December 2009

3-[4-Diarylmethyl-1-oxophthalazin-2(1 H)-yl]propanenitriles were prepared from 4-diarylmethyl-1-(2 H)phthalazinones by Michael addition and structures were elucidated by X-ray analysis.
Synthesis and Single Crystal X-Ray Structure of N,N′-Bis(Diphenylphosphino)Piperazine
Authors: Balakrishna Maravanji S. , George P. P. , Mague Joel T.
Published: December 2009

The reaction of piperazine with chlorodiphenylphosphine in toluene under refluxing conditions yields Ph2PN(C4H8)NPPh2 in quantitative yield. The structure is confirmed by single crystal X-ray diffraction studies.
Preparation of Selanyl-Substituted Conjugated Enynes by Copper-Catalysed Coupling Reaction of (E)-γ-Selanyl Vinylzirconocene with Acetylenic Bromide
Authors: Xie Meihua , Huang Xian
Published: December 2009

A stereoselective synthesis of conjugated enynes containing allyl selenide unit is reported. Selanyl-substituted conjugated enynes were obtained by the coupling reaction of ( E)-γ-selanyl vinylzirconocene with acetylenic bromide in the presence of CuCl.
A Convenient Synthesis of 2-Aroyl-3,5-Diarylfuran under Microwave Irradiation
Authors: Wang Jin-Xian , Shi Xiao-Ning , Zhao Lian-Biao
Published: December 2009

A simple, rapid and efficient method for the synthesis of 2-aroyl-3,5-diarylfuran under microwave irradiation is described. The effect of microwave irradiation power, times and solvent on the reaction is investigated.
Study on First Reported (2,5) ene Cyclisation: Does it Really Follow a Concerted Pathway?
Authors: Das Gourab Kanti , Mandal Sannyasi Charan , Mondal Nityagopal
Published: December 2009

Theoretical calculation reveals that the reported (2,5) ene cyclization reaction follows a stepwise pathway, which results in a thermodynamically less stable compound through intramolecular proton abstraction; the presence of an external molecule, capable of abstracting a proton, directs the reaction to form thermodynamically more stable compound as a major product.
An Efficient and Convenient Procedure for Preparation of N-Sulfonylimines Catalysed by TiO2/SO42- Solid Superacid
Authors: Jin Tong-Shou , Feng Guo-Liang , Yang Mi-Na , Li Tong-Shuang
Published: December 2009

A facile synthesis of N-sulfonylimines in good to excellent yields was described from aldehydes with sulfonamides catalysed by TiO2/SO42- solid superacid.
3,4-Dihydropyrimidin-2(1H)-Ones via the Biginelli Condensation Promoted by Triphenylphosphonium Perchlorate
Authors: Shanmugam Pachaiyappan , Perumal Paramasivam T.
Published: December 2009

A variety of 3,4-dihydropyrimidinones were synthesised using triphenyl phosphonium perchlorate as a catalyst.
A Facile Synthesis of 2-Substituted Pyrano[2,3-a]Carbazoles
Authors: Chellappan Kavitha , Prasad Karnam Jayarampillai Rajendra
Published: December 2009

The syntheses of 2-(3′,3′-dimethylacryloyl)-1-hydroxycarbazoles (2), 2,2-dimethyl-2,3-dihydropyrano[2,3- a]carbazol-4(11 H)-ones (3), 6-(3′,3′-dimethylacryloyl)-2,2-dimethyl-2,3-dihydropyrano[2,3- a]carbazol-4(11 H)-ones (4), and 2-phenyl- and 2-methyl-pyrano[2,3- a]carbazol-4(11 H)-ones (6 and 8), from 1-hydroxycarbazoles in the presence of 3,3-dimethylacryloyl chloride, cinnamic acid and ethyl acetoacetate, are described.
Synthesis of New Chiral Diaza 18-Crown-6 Ethers from Chiral Amines
Authors: Demirel N. , Turgut Y. , Hosgören H.
Published: December 2009

Practical syntheses of versatile building blocks of crown ethers 1 and 2, chiral amine precursors 3–6 and chiral diaza 18-crown-6 ethers 7–12 are reported starting from chiral amines.
Synthesis and structural characterisation of a new ferrous-ferric borophosphate: (NH4)0.5FeII0.5FeIII0.5(H2O)2BP2O8 0.5H2O
Authors: Shi Hengzhen , Shan Yongkui , He Mingyuan , Liu Yuyan
Published: December 2009

A new ferrous-ferric borophosphate was synthesised by hydrothermal conditions and structurally characterised by X-ray single crystal diffraction, IR, TGA, XPS as well as magnetic measurement.
Organic Reactions in Ionic Liquids: Cyclocondensation of α-Bromoketones with 2-Aminopyridine
Authors: Xie Yuan-Yuan , Chen Zhen-Chu , Zheng Qin-Guo
Published: December 2009

The room temperature ionic liquid 1- n-butyl-3-methylimidazolium tetrafluoroborate (BMImBF4), is used as a ‘green’ recyclable alternative to classical molecular solvents for the cyclocondensation of α-bromoketones with 2-aminopyridine to form 2-arylimidazo[1,2-a]pyridines with rate accelerations and improved yields.
Ionic Liquid-Accelerated Arylation of Sodium Arenesulfinates with Diaryliodonium Salts Used for the Synthesis of Diaryl Sulfones
Authors: Feng-Yan Wang , Chen Zhen-Chu , Zheng Qin-Guo
Published: December 2009

Arylation of sodium arenesulfinates with diaryliodonium salts can be performed with good yields in the room-temperature ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMim]BF4), which provides an efficient method for the synthesis of diaryl sulfones; the ionic liquid can be recycled and reused.
An Alternative Route to Syntheses of Aryl Keto Acids in a Chloroaluminate Ionic Liquid
Authors: Mohile Swapnil S. , Potdar Mahesh K. , Salunkhe Manikrao M.
Published: December 2009

The Lewis acidic 1-butyl-3-methylimidazolium chloroaluminate ionic liquid [bmim]Cl.AlCl3, N=0.67, is employed as a catalyst as well as the solvent for the quick and efficient syntheses of aryl keto acids by Friedel–Crafts acylation and aroylation of aromatic hydrocarbons using cyclic acid anhydrides.
Reaction of Indole and Alkylindoles with Ceric Ammonium Nitrate on Silica Gel
Authors: Chakrabarty Manas , Sarkar Sandipan , Basak Ramkrishna
Published: December 2009

Treatment of N-methylindole with CAN-on-SiO2 furnished 2,2-bis( N-methyl-3′-indolyl)- N-methylindoxyl, whereas that of skatole, N-methyl and N-ethyl skatoles produced the respective 2-nitroskatoles along with 6-nitroskatole and N-methyl-5-nitroskatole.
Medium-Sized Cyclophanes. Part 65.1Ipso-Bromination of Di-Tert-Butyl-[n.2]Metacyclophanes
Authors: Yamato Takehiko , Okabe Ryo , Yamada Yuta
Published: December 2009

Bromination of 5,13-di- tert-butyl-8,16-dimethoxy[2.2]metacyclophane with excess bromine in the presence of iron powder afforded only the hexabromo compound arising from two-fold ipso-bromination at the tert-butyl groups.
Efficient and Chemoselective Conversion of Aryl Aldehydes to Their Azalactones Catalysed by Bi(III) Salts under Solvent Free Conditions
Authors: Khodaei Mohammad Mehdi , Khosropour Ahmad Reza , Jomor Saied Jabar Hoseini
Published: December 2009

Bi(NO3)3.5H2O, Bi(TFA)3 and Bi(OTf)3 were found to be highly powerful and practical catalysts for the synthesis of azalactones under solvent free conditions with excellent yields. In addition, high chemoselectivity for this synthesis has been achieved. Selective condensation of aryl aldehydes in the presence of aliphatic aldehydes, is another advantage of this procedure.
A Novel Doubly Phenoxo-Bridged Cu(II) Trimer: Synthesis, Crystal Structure and Low-Temperature Magnetic Behaviour
Authors: Datta Amitabha , Choudhury Chirantan Roy , Talukder Pritha , Mitra Samiran , Dahlenburg L. , Matsushita T.
Published: December 2009

A novel doubly phenoxo-bridged Cu(II) trimeric complex, [trinuclear diperchlorato {2,2′-[1,3-propanediylbis (nitriloethylidyne)]bisphenolato}-tricopper] has been synthesised with a tetradentate Schiff base ligand and characterised by IR, electronic spectra, X-ray structure and variable temperature magnetic moments. The Cu1 centre has square pyramidal geometry where as the Cu2 centre achieves square planar geometry. The dihedral angle between the two planes, Cu1 – O1 – O2 and Cu2 – O1 – O2 is 26.50°.
A Mild and Efficient Synthesis of N–Aryl–N′–Aroyl Thioureas under Phase Transfer Catalysis and Solvent-Free Conditions
Authors: Wei Tai-Bao , Lin Qi , Zhang You-Ming , Wei Wei
Published: December 2009

A series of N–aryl– N′–aroyl thioureas 3a-m were synthesized in high yields (80.0-98.1%) by an environmentally benign, simple and efficient method under phase transfer catalysis and solvent-free conditions.
A Facile Synthesis of 1,2-Dihydroquinazolin-4(3H)-Ones with the Aid of a Low-Valent Titanium Reagent
Authors: Shi Daqing , Wang Juxian , Rong Liangce , Zhuang Qiya , Tu Shujiang , Hu Hongwen
Published: December 2009

A short and facile synthesis of a series of 1,2-dihydroquiazolin-4(3 H)-ones was accomplished in good yields via the novel reductive cyclisation of o-nitrobenzamides with aldehydes or ketones promoted by the TiCl4/Sm system. Structures were established on the basis of elemental analysis, IR, 1H NMR and confirmed by a single-crystal X-ray diffraction analysis. The advantages of our method are easily accessible starting materials, convenient manipulation and moderate to high yields.
Stereoselective Synthesis of (E)-α-Halovinylsilanes Via Hydrozirconation of Alkynylsilanes
Authors: Cai Ming-Zhong , Huang Jia-Di , Ye Xin-Lin , Song Cai-Sheng
Published: December 2009

Hydrozirconation of alkynylsilanes 1 at room temperature in THF gave the ( E)-α-silylvinylzirconium complexes 3, which were reacted with NBS or iodine to afford stereoselectively ( E)-α-halovinylsilanes 4 in good yields.
Synthesis of Phenyl and Substituted Phenyl 3-Ethyl-2,3,5,9B-Tetrahydro[1,3]Oxazolo[2,3-a]Isoindol-5-Ones
Authors: Nair Dinesh S. , Pauranik Vedavati , Shah Amrish C.
Published: December 2009

Addition of various aryl magnesium bromides to ( R) or ( S)-2-(1-hydroxybutyl)phthalimide results in the formation of substituted ( R) or ( S)–3-hydroxy-2(1-hydroxybutyl)isoindol-1-ones which are subsequently cyclised under highly acidic conditions to give the title compounds in moderate yields.
Correlation of the Rates of Solvolysis of 2-Thiophenecarbonyl Chloride
Authors: D'Souza Malcolm J. , Stant-Boggs Mary E. , White Robin , Kevill Dennis N.
Published: December 2009

The specific rates of solvolysis of 2-thiophenecarbonyl chloride are very well correlated by the extended Grunwald-Winstein equation over a wide range of solvents; contrary to previous claims of an SN2 mechanism, the solvolyses are predominantly by an ionisation mechanism aided by nucleophilic solvation.
A Facile Synthesis of Novel 1,7-Dihydropyrazolo [3,4-b]Pyridine-4,6-Diones
Authors: Yuan Dekai , Li Zhengming , Zhao Weiguang
Published: December 2009

1,7-Dihydropyrazolo[3,4- b]pyridine-4,6-diones 4 were obtained from ethyl 3-methylthio-5-aminopyrazole-4-carboxylate and diketene in three steps. A series of 5-anilinomethylene-1,7-dihydropyrazolo[3,4- b]pyridine-4, 6-diones 5 was easily derived from 4.
Corrosion Behaviour of TiN0.8O0.4 Coating on 316L Stainless Steel Alloy
Authors: Jouaiti A. , Boulghallat M. , Lâallam L. , Oulfajrite H. , Fabreguette F. , Guillot J. , Bourgeois S. , Steinbrunn A.
Published: December 2009

Titanium oxinitride thin film with a thickness equal to 250 nm is obtained at 700 °C by the LP-MOCVD method. Analysis by photoelectron spectroscopy and by X-ray diffraction show that the composition of the deposit is TiN0.8O0.4 with a TiN structure. Morphological observation of the deposit, studied by scanning electron microscopy, indicated that the surface is rough with the presence of some fissures. Electrochemical study of samples in Ringer's solution (9g/l of NaCl) at 37°C, showed the role played by the surface state and imperfections on the corrosion acceleration.
Oxidation of Primary Aromatic Amines to Azo Derivatives with Sodium Periodate using Polystyrene-Bound Manganese(III) Porphyrin
Authors: Mirkhani Valiollah , Tangestaninejad Shahram , Moghadam Majid , Karimian Zohreh
Published: December 2009

The manganese (III) complex of 5,10,15,20-tetrakis(4-aminophenyl)porphyrin covalently bound to crosslinked chloromethylated polystyrene [Mn(H2NTPP)-CMP] can act as an efficient catalyst for oxidation of primary aromatic amines to the corresponding azo compounds by sodium periodate in the presence of imidazole as axial ligand.
Synthesis and Reactions of Chiral Tetrahedral Clusters Containing an COOCH3 functional group
Authors: Zhao Quan-Yi , Zhang Wei-Qiang , Zhang Yu-Hua , Hu Bin , Yin Yuan-Qi , Xia Chun-Gu
Published: December 2009

The new cluster [CoRuW(CO)8(μ3-S)(η5–C5H4COOCH3)] 2 was isolated from the reaction of [Co2Ru(CO)9(μ3-S) 1 with Na[W(CO)3(η5–C5H4COOCH3)]. Through the further reaction of cluster 2 with n-propylamine, a new cluster [CoRuW(CO)8(μ3-S) (η5–C5H4CONH-C3H7)] 3 was obtained and the structure of cluster 2 has been established by single crystal X-ray diffraction.
Tetrahydropyranylation of Alcohols, Thiols, Phenols and Primary Amines Catalysed by Magnesium Halide
Authors: Goud P. Mallikarjun , Goud P. Satish , Reddy K. Ramasubba , Ashok D.
Published: December 2009

An efficient and mild method for tetrahydropyranylation of thiols, alcohols, phenols and primary amines using a catalytic amount of MgX2 (X = Br or I) is described; due to the neutral conditions employed, the method is also compatible with compounds which possess acid-sensitive functional groups.
Synthesis of Novel Mesoionic [1,2,4]Triazolo[1,5-a] Pyridin-4-Ium-2-Thiolates with Antibacterial Activity
Authors: Basyouni Wahid M. , El-Bayouki Khairy A. M. , Hosni Hanaa M.
Published: December 2009

The [1,2,4]triazolo[1,5- a]pyridinium-2-thiolates 3a–n and triazolo-pyridinium iodides 11a–g have been synthesised and characterised. A number of the newly synthesised products were screened for in vitro antibacterial activity.
Oxidative Fragmentations of Some Azolyl Ketones and Related Compounds Induced by Cerium (IV) Ammonium Nitrate (CAN)
Authors: Bertha Ferenc , Giang Le Thanh , Fetter József , Kajtár-Peredy Mária , Lempert Károly , Czira Gábor
Published: December 2009

In contrast to simple ketones which are stable to CAN, azolyl ketones 3d–3f, 11a, 11b and, in part, 3c and 4c undergo oxidative fragmentation when treated with cerium(IV) ammonium nitrate (CAN).
Alkylation of Pyrrolidine-2,5-Dione with 2-(3,4-Dihydro-1-Naphthalenyl)Ethyl-4-Methylphenylsulfonates: A New and General Approach to 13-Aza-8,9-Dehydro-3-Desoxy-18-Norestrone Analogs
Authors: Ramana M.M.V. , Parihar J.A. , Jaiswar M.M.
Published: December 2009

Pyrrolidine-2,5-dione was N-alkylated with five different 2-(3,4-dihydro-1-naphthelenyl)ethyl-4-methylphenylsulfonates to afford the corresponding imides, which on reduction with NaBH4 in MeOH at −10°C followed by intramolecular cyclisation in POCl3 afforded the corresponding title compounds.
The Behaviour of N,N-Disubstituted 5-Arylmethylidene-2-Aminothiazole-4(5H)-Ones Towards Cyclic CH Acids and Ethyl Cyanoacetate
Authors: Kandeel Kamal A. , Youssef Ali M. , El-Bestawy Hany M. , Omar Mohamed T.
Published: December 2009

N,N-Disubstituted 5-arylmethylidene-2-aminothiazol-4( 5H)-ones reacted with uracil, dimedone and ethyl cyanoacetate to give adducts as a result of addition at the β-terminal of the azomethine moiety and/or addition at the β-carbon of the α,β-unsaturated carbonyl system.
Unexpected Formation of a Borated P-Azulene Via the Reaction of a Borated Diazaphospholidine with Phenyllithium
Authors: Ansell Jeffrey R. , Alcock Nathaniel W. , Wills Martin
Published: December 2009

The reaction of a borated diazaphospholidine with phenyllithium provides a means for the formation of P-azulene hetereocycles via an addition/nucleophilic aromatic substitution reaction.
Synthesis and Characterisation of Dibenzofuran Derivatives
Authors: Zhang Wen , Su Liming , Sun Wen-Hua , Jin Xianglin
Published: December 2009

A series of arylamine derivatives of dibenzofuran were synthesised and the X-ray structure of compound 2, 4,6-diformylbenzofuranbis(2,6-diisopropylanil), was solved.
The Bromination and Nitration of Some (2H)-1, 4-Benzoxazin-3(4H)-Ones
Authors: Hanson James R. , Richards Lisa , Rozas Panteleimon
Published: December 2009

Conditions are described for the bromination and nitration of (2 H)-1,4-benzoxazin-3(4 H)-3-one, its 6-chloro and 6-methyl analogues and (2 H)-1,4,-benzothiazin-3(4 H)-one at C–6 and C–7 and for the dibromination (6, 7–) and dinitration (6, 8–) of (2 H)-1,4-benzoxazin-3(4 H)-3-one.
Thermal Isomerisation of Vitamin D3 in Dimethyl Sulfoxide
Authors: Jin Xiaoling , Yang Xinping , Yang Li , Liu Zhong-Li , Zhang Fa
Published: December 2009

Thermal isomerisation of vitamin D3 at 140 °C under nitrogen in the dark gave isovitamin D3 and isotachysterol as the principal products, identified by 1H and 13C NMR spectroscopy.
Convergent Synthesis of AB2-AB3 Hybrid-Type of Amphiphilic Oligoethyleneoxy-Modified Poly(Benzyl Ether) Dendrons
Authors: Tang Dai-Hua , Fan Qing-Hua
Published: December 2009

A new class of AB2-AB3 hybrid-type of amphiphilic oligoethyleneoxy-modified poly(benzyl ether) dendrons has been synthesised by a convergent route.
5-Hydroxyorotic Acid and Orotic Acid 5-Sulfate
Authors: Behrman E. J.
Published: December 2009

The title compounds were synthesised by application of the Elbs oxidation to orotic acid
Efficient Aromatic Acylation Using Catalytic Ytterbium(III) Bis(Trifluoromethylsulfonyl)Amide Activated by Lithium Perchlorate in Nitromethane
Authors: Nie Jin , Gong Yanwei , Zhang Zhengbo , Liu Wenming
Published: December 2009

Various aromatic ketones were prepared in good to high yields by acylation using ytterbium bis(trifluoromethylsulfonyl) amide as catalyst in 4M lithium perchlorate in nitromethane.
Quinolinium Fluorochromate as a Reagent for Selective Oxidative Cleavage of Oximes and Phenylhydrazones to their Parent Carbonyl Compounds under Non-Aqueous and Aprotic Conditions
Authors: Tajbakhsh Mahmood , Mohammadpoor-Baltork Iraj , Lehmali Farhad Ramzanian
Published: December 2009

Deprotection of oximes and phenylhydrazones to their parent aldehydes and ketones in high yields has been carried out by using quinolinium fluorochromate as a selective oxidant under mild conditions.
Microwave-Induced In Situ Wittig Reaction of Salicylaldehydes with Ethyl Chloroacetate and Triphenylphosphine in Solventless System
Authors: Valizadeh H. , Shockravi A. , Heravi M. M. , Ghadim H. Abbasi
Published: December 2009

A variety of coumarins was prepared by an in situ Wittig reaction of salicylaldehydes, triphenylphosphine and ethyl chloroacetate using sodium methoxide/molecular sieves (3Å) under solvent-free conditions.
An Efficient and Convenient Method for the Synthesis of Aromatic Sulfones Catalysed by ZrO2/S2O82- Solid Superacid
Authors: Jin Tongshou , Yang Mina , Feng Guoliang , Li Tongshuang
Published: December 2009

A manipulatively simple and rapid procedure for the synthesis of diaryl sulfones from arylsulfonyl chlorides with aromatic compounds is described; the reaction is conducted under Friedel–Crafts conditions in the absence of solvent using ZrO2/S2O82- as catalyst in 78–93% yields.
Intermolecular Aldol Type Reactions of Phenacyl Bromide with Aldehydes Mediated by Active Metallic Indium in Aqueous Media
Authors: Wu Huayue , Ding Jinchang , Gao Jing , Liu Miaochang
Published: December 2009

Mediated by active metallic indium generated in situ from metallic samarium and InCl3.4H2O, phenacyl bromide and aldehydes smoothly underwent intermolecular aldol type reaction in aqueous media affording β-hydroxy ketones in good yields and under mild conditions.
The S-Cis and S-Trans π Complexes of B-Bromocatecholborane and (E)-2-Butenal
Authors: Anderson Charles , McGinnis Michael , Vagle Kurt , Edwards Anna , Engle Nancy , Sick Rachel , Kabalka George W. , Pagni Richard M.
Published: December 2009

( E)-2-Butenal reacts with B-bromocatecholborane in CD2Cl2 at −78°C to form two species in a 1:1 ratio which does not vary between −20°C and −100°C; IR and NMR experiments (1H–1H COSY and 1H–13C HETCOR and 1H–1H ROESY [CAMELSPIN]) demonstrate that the two species are π complexes in which the aldehyde exists in s-cis and s-trans conformations which interconvent slowly (1H–1H EXSY NMR).
Synthesis of the Chiral Indenyl Tetrahedral Clusters [(μ3-S)FeCoM(r|5-Ind)(CO)8] (M=Mo,W) and the Crystal Structure of [(μ3-S)FeCoW(r|5-Ind)(CO)8]
Authors: Zhang Wei-Qiang , Zhu Bao-Hua , Hu Bin , Zhang Yu-Hua , Zhao Quan-Yi , Yin Yuan-Qi , Sun Jie
Published: December 2009

The new indenyl tetrahedral cluster [(μ3-S)FeCoM (η5-Ind)(CO)8] (M=Mo 2, W 3) have been isolated from the reaction of [(μ3-S)FeCo2(CO)9] 1 and K+[(η5-Ind)M(CO)3]- (M=Mo,W) under mild conditions and the crystal structure of [(μ3-S)FeCoW(η5-Ind)(CO)8] 3 has been established, affording structural evidence for the ring slippage of the indenyl ligand.
A New, Safe and Convenient Procedure for Reduction of Naphthalene and Anthracene: Synthesis of Tetralin in a One-Pot Reaction
Authors: Menzek Abdullah , Altundas Aliye , Gültekin Demet
Published: December 2009

Reduction of naphthalene and anthracene with sodium and tert-butyl alcohol gave 1,4-dihydronaphthalene and 9,10-dihydroanthracene respectively in high yields at room temperature (r.t.) as the sole products. The synthesis of tetralin from naphthalene was carried out in a one-pot reaction via 1,4-dihydronaphthalene. The reduced products were easily isolated.
Organic reactions in ionic liquids: N-alkylation of cyclic imides with alkyl halides promoted by potassium fluoride
Authors: Hu Yi , Chen Zhen-Chu , Le Zhang-Gao , Zheng Qin-Guo
Published: December 2009

An ionic liquid based on 1-butyl-3-methylimidazolium hexafluorophosphate is used as an efficient reusable reaction medium in the N-alkylation of cyclic imides with alkyl halides promoted by fluoride ion.
Activation by allylic alcohols of sulfur-containing dienes to ruthenium-catalysed ring-closing metathesis
Authors: Rowlands Gareth J. , Singleton John
Published: December 2009

The presence of an allylic alcohol facilitates ring-closing metathesis of sulfur-containing substrates with Grubbs’ dihydroimidazole ruthenium complex.
Chromone studies. Part 15. Formation and condensation of Baylis–Hillman adducts in DABCO-catalysed reactions of chromone-3-carbaldehydes with acrylonitrile
Authors: Kaye Perry T. , Molefe Duduzile M. , Nchinda Aloysius T. , Sabbagh Liezel V.
Published: December 2009

1,4-Diazabicyclo[2.2.2]octane(DABCO)-catalysed reactions of selected chromone-3-carbaldehydes with acrylonitrile (or methyl vinyl ketone) have led to the formation of Baylis–Hillman adducts and, in some cases, novel polycyclic condensation derivatives; electron-impact and electrospray MS fragmentation patterns have been examined for selected products.
Interaction of carbonylchlorohydridotris (triphenylphosphine) ruthenium (II) with purine, adenine, cytosine and cytidine
Authors: Ghose Ranjana
Published: December 2009

Complexes of the type [RuH(Cl)(CO)(L)PPh3] (L=purine, adenine, cytosine or cytidine) have been prepared and their spectroscopic properties are reported.
Ultrasound-Promoted Scavenging: A Rapid Parallel Purification for Solution Phase Combinatorial Synthesis
Authors: Peng Yanqing , Song Gonghua , Xu Xiaoyong
Published: December 2009

Ultrasound irradiation enhances the mass transfer and reaction rate in scavenging, avoiding the trouble of time-consuming purification procedure in solution-phase parallel synthesis. An application of this technique is demonstrated in the scavenging of excess isothiocyanates from reaction mixtures.
One-pot facile synthesis of 1,3,4-trisubstituted imidazolin-2-ones
Authors: Cheng Yunfeng , Hu Yongzhou
Published: December 2009

A one-pot synthesis of 1,3,4-trisubstituted imidazolin-2-ones, from the reaction of α-aminoacetophenone hydrochlorides with aryl isocyanates in good yields, is described.
Synthesis of 3,3′-bipyrazole, 5,5′-bi-1,3,4-thiadiazole and fused azole systems via bishydrazonoyl chlorides
Authors: Dawood Kamal M. , Elwan Nehal M.
Published: December 2009

A number of novel 3,3′-bi-pyrazole, 5,5′-bi-1,3,4-thiadiazole and azolothiazole derivatives were synthesised via cycloadditions of bis-hydrazonoyl chlorides with olefin, active methylene, and thioacetanilide synthons.
Facile and regioselective conversion of epoxides into β-chlorohydrins using ZrCl4
Authors: Smitha G. , Reddy Ch. Sanjeeva
Published: December 2009

Epoxides were efficiently converted into the corresponding β-chlorohydrins in good yields by treatment with ZrCl4 in acetonitrile.
Recent research and development in synthetic polymer-based drug delivery systems
Authors: Ghosh Samaresh
Published: December 2009

In recent years, there has been increasing recognition that a number of synthetic polymers which have excellent biodegradability and biocompatibility are materials of pharmaceutical importance in the area of drug delivery technology. The aim of this review is to take a closer look at a few synthetic polymer-based drug delivery systems, specially the aliphatic polyesters, polyamides, polyethers, polyorthoesters, polyanhydrides, polyurethanes, hydrogels and dendritic polymers.
Selective reduction of azoarenes into arylamine(s) by aluminium / NH4Br under sonic conditions
Authors: Pasha M A , Jayashankara V P
Published: December 2009

Azoarenes, both symmetrical and unsymmetrical are cleaved into arylamine/s by aluminium metal and ammonium bromide in refluxing methanol with high yields. The rate of the reaction is greatly accelerated by irradiating at 35 kHz in a sonic bath maintained at 25 °C.
A rapid and efficient synthesis of thiochroman-4-ones under microwave irradiation
Authors: Li Ji-Tai , Li Hong-Ya , Li Hui-Zhang , Xiao Li-Wei
Published: December 2009

Thiochroman-4-ones were synthesised by the cyclization of β-arylthiopropionic acids which were prepared by the condensation of the arylthiols with chloropropionic acid under microwave irriadiation within 4min.
Enantioselective synthesis of (+)-nuciferal, (+)-(E)-nuciferol and (+)-α-curcumene by chiral hydrogenesterification reaction
Authors: Du Zhenting , Yue Guoren , Ma Junying , She Xuegong , Wu Tongxing , Pan Xinfu
Published: December 2009

Using chiral hydrogenesterification reaction as the key step, the stereoselective synthesis of (+)-nuciferal 1, (+)-(E)-nuciferol 2 and (+)-a-curcumene 3 has been achieved.
Reactions of β-oxo-α,β-bis(alkoxycarbonyl)phosphonium ylides based on P-heterocycles
Authors: Keglevich György , Forintos Henrietta , Ujvári Anikó , Imre Tímea , Ludányi Krisztina , Nagy Zoltán , Tőke László
Published: December 2009

The title phosphonium ylides give an ylidene oxolactone under reductive conditions and are unreactive towards aldehydes, but are degraded by hydroxylamine to form the simpler acetic ester phosphonium ylides that do react with aldehydes in the normal manner.
Hypervalent iodine in synthesis 87: The synthesis of 2,5-diaryl-2H-tetrazoles
Authors: Zhou Tao , Chen Zhen-Chu
Published: December 2009

In the presence of cuprous iodide and potassium carbonate, N-arylation of 5-aryl-2H-tetrazole with a diaryliodonium salt proceeds smoothly in DMF at room temperature to give 2, 5-diaryl-2H-tetrazoles in moderate to good yield.
Synthesis and crystal structure of a novel cobalt phosphonate containing the [Co(H2O)6]2+ cation
Authors: Zheng Guo-Li , Ma Jian-Fang , Yang Jin
Published: December 2009

Reaction of hexamethylenediaminetetrakis(methylphosphonic acid), [(H2O3PCH2)2N(CH2)6N(CH2PO3H2)2] (H8L), with cobalt nitrate affords a novel phosphonate, [Co(H2O)6][Co(H2O)4(H6L)2]·12H2O (1), and its structure was determined by X-ray diffraction analysis.
An efficient synthesis of aryloxyacetic acid and arylthioacetic acid esters
Authors: Li Ji-Tai , Li Hong-Ya , Li Hui-Zhang
Published: December 2009

The esterification of the aryloxyacetic acid and arylthioacetic acid catalysed by silica sulfuric acid results aryloxyacetic acid and arylthioacetic acid ester in 83–94% yields respectively under mild reaction conditions.
A facile conversion of aryl alkyl ketones into methyl 2-arylalkanoates using poly[4-(diacetoxyiodo)styrene]
Authors: Sheng Shou-Ri , Zhong Ming-Hua , Liu Xiao-Ling , Luo Qiu-Yan , Chen Hui-Zong
Published: December 2009

Treatment of aryl alkyl ketones with poly[4-(diacetoxyiodo)styrene] and trimethyl orthoformate in the presence of sulfuric acid followed by hydrolysis afforded methyl 2-arylalkanoates in good yields. The polymeric reagent can be regenerated and reused as an environmentally benign reagent.
Synthesis and crystal structure of 1-isobutyryl-3,6-diphenyl-1,4-dihydro-1,2,4,5-tetrazine
Authors: Rao Guo-Wu , Hu Wei-Xiao
Published: December 2009

The title compound was prepared from isobutyric anhydride and 3,6-diphenyl-dihydro-1,2,4,5-tetrazine and its structure elucidated by X-ray analysis.
Synthesis of 2-amino-3-ethoxycarbonyl-4-aryl-4H,5H-pyrano-[3,2-c]benzopyran-5-one
Authors: Tu Shujiang , Jiang Hong , Fang Fang , Feng Youjian , Zhu Songlei , Li Tuanjie , Zhang Xiaojing , Shi Daqing
Published: December 2009

A series of 2-amino-3-ethoxycarbonyl-4-aryl-4 H,5 H-pyrano-[3,2- c]benzopyran-5-ones have been were synthesised by the reaction of 4-hydroxycoumarin, an aromatic aldehyde and ethyl cyanoacetate under microwave irradiation with short times and high yields.
Molecular Recognition in β-Lactams: The Crystal Packing in 4-Sulfonyl β-Lactams
Authors: Basak Amit , Bag Subhendu Sekhar , Mazumdar Pooja Anjali , Bertolasi Valerio , Das Amit Kumar
Published: December 2009

Single crystal X-ray structures of 4-phenyl sulfonyl 2-azetidinone 1, a 1:2 conglomerate of the corresponding 3-methyl (trans) and 3,3-dimethyl derivatives 2A and 2B/2C respectively and 3-acetoxymethyl 1,4-diphenyl 2-azetidinone 3 revealed interesting variation in crystal packing dictated by H-bonding and hydrophobic interactions which may be responsible for molecular recognition in β-lactams.
Organic Reactions in Ionic Liquids: An Efficient Method for the N-Alkylation of Benzotriazole
Authors: Le Zhang-Gao , Chen Zhen-Chu , Hu Yi , Zheng Qin-Guo
Published: December 2009

The N-alkylation of benzotriazole with alkyl halides proceeds efficiently in the presence of potassium hydroxide in ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]).
Topological analysis and quantum mechanical structure of H3+
Authors: Sadjadi Abdolreza , Abdzadeh Maryam , Behnejad Hassan
Published: December 2009

Ab initio calculations have been performed for H3+ at the Restricted–Hartree–Fock, RHF/cc-pVQZ, level of calculations. The electron density function [Rho(r)] of this simple classical ring system was analysed using AIM theory. Our results showed the nature of the bonds and the quantum mechanical structure of H3+. This analysis resulted in a thoroughly different bond scheme and structure in comparison to what is deduced from the classical view and the previous AIM analysis. The Rho(r) of the H2 molecule was also analysed by the same manner for comparison.
The microbiological hydroxylation of some methoxysteroids by Cephalosporium aphidicola
Authors: Kiran Ismail , Hanson James R. , Hunter A. Christy
Published: December 2009

The effect of replacing a hydroxyl group by a methoxyl group on the microbiological hydroxylation of some steroids by the fungus, Cephalosporium aphidicola, has been examined.