bluuebunny/crossref_metadata_2025 huggingface dataset:
Total vs. partial aponeurectomy for Dupuytren’s contracture — A literature review
Authors: Högemann Astrid , Kendoff Daniel , Wolfhard Ulrich , O’Loughlin Patrick , Olivier Lucien
Published: December 2009

The etiology of Dupuytren’s disease is controversial and thus the disease can only be treated when it presents with symptoms to warrant intervention. Surgical treatment is the method of choice to preserve hand dexterity and function. It is advisable to perform surgery at an early stage of disease progression, but various surgical techniques have been advocated. A partial fasciectomy is recommend by many authors, whereas a total aponeurectomy, where all palmar tissue is removed, might reduce the risk of recurrent disease due to the widespread removal of aponeurosis. The total aponeurectomy is performed less frequently due to the potential complications of this technique. In order to achieve an objective comparison of both surgical options we performed a literature meta-analysis, involving a comparison of surgical indications, results and complications following partial and total aponeurectomy, which are described in detail within this review article.
Regioselective Synthesis of Spiro[Naphthalene-2(1H),3′-[3H]Pyrazol]-1-Ones Utilizing 1,3-Dipolar Cycloaddition of Nitrilimines
Authors: Mishriky Nawal , Girgis Adel S. , Ibrahim Yehia A.
Published: December 2009

1,3-Dipolar cycloaddition reaction of nitrilimines to a variety of 2-arylmethylidene-3,4-dihydro-1-naphthalenones 1a–h afforded the corresponding spiro[naphthalene-2(1 H),3′-[3 H]pyrazol]-1-ones 3 and not the isomeric spiro[naphthalene-2(1 H),4′-[4 H]pyrazol]-1-ones 4, in high regioselectivity. The structure of the isolated products was established through different spectroscopic techniques and confirmed via HMBC.
A Mild and Versatile Method for the Preparation of Oximes by Use of Calcium Oxide
Authors: Sharghi Hashem , Sarvari Mona Hosseini
Published: December 2009

A convenient method for the cleavage of aldehydes and ketones to their corresponding oximes with CaO is described.
Heteroaromatization with 4-Hydroxycoumarin Part I: Synthesis of some new Pyranocoumarins and Coumarinopyranopyrimidines
Authors: El-Agrody A.M. , El-Latif M.S. Abd , Fakery A.H. , Bedair A.H.
Published: December 2009

Considerable interest has been shown in coumarin derivatives, on account of their excellent pharmacological activity1-3. In continuation of our work4-6, it was of interest to synthesize new coumarin derivatives, which might be biologically active. Thus condensation of 4-hydroxycoumarin 1 with various substituted α-cyanocinnamonitrile 2a-n in ethanolic piperidine afforded pyrano[3,2-c]coumarin derivatives 3a-n (Scheme 1).
Cation Exchange Resin Supported Oxidation of Alkylbenzenes and Olefins using Potassium Permanganate†
Authors: Joshi Padmaker L. , Hazra Braja G.
Published: December 2009

Rapid and efficient oxidation of alkylbenzene side chains at the benzylic positions as well as oxidative cleavage of olefins with potassium permanganate in presence of solid polymeric cation exchange resins in good yields is reported.
Microwave Enhanced Decarboxylations of Aromatic Carboxylic Acids: Improved Deuteriation/Tritiation Potential
Authors: Frederiksen Lottie B. , Grobosch Thomas H. , Jones John R. , Lu Shui-Yu , Zhao Chao-Cheng
Published: December 2009

Decarboxylation of aromatic carboxylic acids under microwave enhanced conditions is an increasingly attractive method of preparing deuterium/tritium labelled compounds.
Synthesis and crystal structure of 2,2′-dimethyl-8,8′-biquinolyl
Authors: Kitamura Chitoshi , Yamamoto Shinya , Ouchi Mikio , Yoneda Akio
Published: December 2009

2,2′-Dimethyl-8,8′-biquinolyl was prepared by homo-coupling and its structure was first elucidated by X-ray analysis.
Unusual Terpenoid Constituents of the Soft Coral Sinularia dissecta
Authors: Ramesh P. , Venkateswarlu Y.
Published: December 2009

Chemical examination of the soft coral Sinularia dissecta furnished six known terpenoids, along with a new sequiter-penoid seco-africanane (1) and a new norcembrane diterpene (2)
Cyclic Voltammetry Studies on Substituted Arenesulfonhydrazides
Authors: Ragnarsson Ulf , Grehn Leif , Maia Hernani L.S. , Monteiro Luis S.
Published: December 2009

Additional Z and Boc groups on the vicinal nitrogen of sulfonyl hydrazines have no significant effect on the cathodic potential of the sulfonyl functions as measured by cyclic voltammetry, whereas a Boc group on the geminal nitrogen invariably gives rise to shifts of about 0.2 V to less negative potential similar to those previously observed for derivatives of amines.
Synthesis of 2-acyl- and 2-benzoylindoles
Authors: Mali Raghao S. , Tilve Santosh G. , Desai Vidya G.
Published: December 2009

2-Nitrobenzaldehydes (3a–c) on reaction with phosphoranes (4a and 4b), and triphenyl phosphine in refluxing diphenylether provide 2-acylindoles (6a–c) and 2-benzoylindoles (6d–f). Alternatively 2-nitrobenzaldeydes (3a–c) on reaction with phosphoranes (4a and 4b) give nitroketones (5a–f) which on refluxing with triphenyl phosphine in refluxing diphenyl ether furnish 2-acyl- and 2-benzoylindoles (6a–f).
Studies with 2H pyranones: Synthesis of new 3-substituted-4-hydroxy-2H-pyran-2-ones
Authors: Al-Saleh Balkis , Al-Awadi Nouria , Al-kandari Halema , Abdel-Khalik Mervat Mohammed , Elnagdi Mohamed Hilmy
Published: December 2009

3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one 1a condensed with N,N-dimethylformamide dimethyl acetal yielding the enaminone 3a. The latter reacted with a variety of reagents affording pyridine derivatives 11, benzofuranoylpyranes 14 and 17, pyranylpyranes 22, pyranylpyrazole 29a,b and pyranylisoxazole 33.
Synthesis and characterization of some new styphnyl-bis-ß-alanine derivatives
Authors: Sikder Arun K. , Sonawane Sanjeevani S. , Mehilal  , Sikder Nirmala
Published: December 2009

A new series of N,N'–dinitro-styphnyl-bis-ß-alanine derivatives have been prepared, characterised and evaluated for its preliminary explosives properties in order to find its suitability to explosives and propellants formulations.
Solvent extraction of Cu(II) by LIX 54-100 and its application to a solid supported liquid membrane system
Authors: Bermejo Juan Carlos , Alonso Manuel , Sastre Ana María , Alguacil Francisco José
Published: December 2009

The extraction of Cu(II) by LIX 54-100 (ß-diketone) in Iberfluid (kerosene type diluent) from ammoniacal/ammonium sulphate solutions has been investigated. The analysis of metal distribution data suggested the formation of CuR2 species in the organic phase with formation constant log Kext= −6.15. The results obtained on Cu(II) distribution have been implemented in a solid supported liquid membrane system, using H2SO4 solutions (e.g. 0.9 mol/l) to strip the metal from the organic solution.
Microwave-promoted palladium catalysed Heck cross coupling reaction in water
Authors: Wang Jin-Xian , Yulai Hu Zhanxiang Liu , Wei Bangguo , Bai Lin
Published: December 2009

Palladium-catalysed vinylation of aryl halides in water without org anic cosolvent via microwave irradiation under phase transfer conditions to give the trans-stilbenes and substituted trans-cinnamic acid in good to high yield.
A direct, simple and one-step synthesis of tetramethylammonium trioxyfluoromolybdate (VI)
Authors: Mahjoub A. R. , Ghammami S. , Abbasi A. R. , Hossainian A.
Published: December 2009

Reaction between tetramethylammonium fluoride (CH3)4NF and MoO3 in 1:1 molar ratio in the minimum amount of dry acetonitrile gives tetramethylammonium trioxyfluoromolybdate (VI), (CH3)4N[MoO3F] in very high yields. The compound has been characterized by elemental analyses and IR spectral studies. The advantages of the new method are discussed.
Synthesis of new calix(aza) and calix(aza-thia) crowns
Authors: Kumar Manoj , Sharma née Bhalla Vandana , Sharma Punita
Published: December 2009

The synthesis of new calix(aza), calix(aza-thia) crowns and bisbromoacetamides is reported in good yields.
Catalysis of the oxone oxidation of some sulphoxides by Ru(III)
Authors: Meenakshisundaram Subbiah , Sathiyendiran V.
Published: December 2009

Ru(III) catalyses the oxidation of some sulphoxides to sulphones in a clean irreversible process; a two-pathway mechanism–catalyst dependent and independent has been proposed to explain the kinetic behaviour.
A new fluorescent chemosensor: Synthesis and molecular recognition by sulfamidopyrrolidinylidene modified β-cyclodextrin
Authors: Reddy L. Rajender , Reddy M. Arjun , Bhanumathi N. , Rao K. Rama
Published: December 2009

Mono[6-deoxy-6-(1-methyl-2-pyrrolidinylidenesulfamido)-β-cyclodextrin synthesised as new artificial receptor has shown molecular recognition with remarkable sensitivity to various organic compounds with variation of fluorescence upon guest binding.
Syntheses and ion-selective properties of 25,27-bis(2-hydroxyethylthioalkoxyl)-26,28-dihydroxycalix[4]arenes
Authors: Zeng Xianshun , Chen Langxing , Weng Linhong , Ju Hongfanj , He Xiwen , Zhang Zheng-Zhi
Published: December 2009

25,27-Bis(2-hydroxyethylthioalkoxyl)-26,28-dihydroxycalix[4]arenes 7–10 were synthesized and the preliminary performance of 7-10 as ionophores for ion-selective electrode was also investigated.
A Study of the Mechanism of Chlorine Adsorption–desorption on a Pt(111) Surface: A UBI–QEP Approach
Authors: Azizian S. , Gobal F.
Published: December 2009

UBI–QEP based study of the desorption of both atomic and molecular chlorine from Pt(111) surface revealed that in both cases the precursor, atomic chlorine, originates from the three-fold sites and migrate to the on-top positions where desorptions occur.
Highly efficient Nafion–Ce(IV) or Nafion–Cr(III)-catalysed oxidation of polycondensed aromatic hydrocarbons with co-oxidant
Authors: Yamato Takehiko , Shinoda Naoki , Kanakogi Tomomi
Published: December 2009

A Ce(IV) or Cr(III) impregnated Nafion-K catalyst was found to be effective in promoting the dehydrogenative oxidation of polycondensed aromatic hydrocarbon with NaBrO3 as a co-oxidant.
Synthesis and photochemical properties of 2,2′-silaspirobiindan and related compounds
Authors: Inoue Yohtaro , Sugimoto Akira , Mizuno Kazuhiko
Published: December 2009

2,2′-Silaspirobiindan and several related compounds containing group 14 elements are synthesised and characterised. The absorption and fluorescence spectra of the spiro compounds do not show any π–π interaction between two aryl groups, although di-, tri-, tetra-benzyl substituted silanes show the typical intramolecular excimer fluorescence.
The radicals F3• and F3•2-
Authors: Symons Martyn C.R.
Published: December 2009

Exposure of a range of alkali-metal fluorides to ionising radiation gives, in addition to the expected F- and Vk-centres, a radical identified as F3•2-; the aim of this study is to offer an alternative, namely, the radical F3•, and to offer a tentative explanation for its formation.
Convenient heterocyclization reactions with 2-functionalized 3-amino-4-aryl-5,6,7,8-tetrahydrothieno[2,3-b]quinolines: Synthesis of new thienoquinolines, pyridothienoquinolines, pyranothienoquinolines and pyrimidothienoquinolines
Authors: Bakhite Etify A.
Published: December 2009

2-Functionalized-3-amino-4-aryl-5,6,7,8-tetrahydrothieno[2,3-b]quinolines (3a-e) underwent a sequence of heterocyclization reactions to afford the title compounds.
Formation of α-ethylcinnamaldehydes by the reaction of aromatic aldehydes with n-Bu3N/TiCl4
Authors: Ram Ram N. , Charles I.
Published: December 2009

The reaction of various aromatic aldehydes with n-Bu3N in the presence of TiCl4 gave the corresponding α-ethylcinnamaldehydes in 18–31% yield; when p-chlorobenzaldehyde was used, p-chlorobenzyl alcohol was also isolated besides α-ethyl-p-chlorocinnamaldehyde.
Synthesis of some unsymmetrical 2,6-diphenylpyridines for conjugation with analogues of the metal binding unit of bleomycin
Authors: Mehta Lina K. , Parrick John , Sadiq Samina
Published: December 2009

Some 2,6-diphenylpyridines, unsymmetrically substituted at the para position of the phenyl nuclei, have been prepared for incorporation into the molecular architecture of bleomycin analogues.
Simple regioselective synthesis of spiro[2H-indene-2,3′-[3H]pyrazoles]
Authors: Girgis A.S. , Ibrahim Y.A. , Farag I.S. Ahmed , Mishriky N.
Published: December 2009

1,3-Dipolar cycloaddition of nitrilimines to a variety of 2-arylmethylidene-1-indanones 1 or 2-arylmethylidene-1,3-indandiones 5 gave the corresponding spiro[2H-indene-2,3′-[3H]pyrazol]-1(3H)-one 3 and their 1,3-dione derivatives 6 in high regioselectivity. The stereo-configuration of 3 (3'R, 4'S or its enantiomeric form) was established by nOe-difference technique as well as single crystal X-ray diffraction analysis.
One pot synthesis of 2,2-dichloro-1, 1-bis(4-dialkylaminophenyl)ethylenes by Friedel–Crafts acylation
Authors: Mandal Nirup B. , Banerjee Sukdeb , Sahu Niranjan P.
Published: December 2009

A simple method is described for the preparation of 2,2-dichloro-1,1-bis(4-dialkylaminophenyl)ethylenes from dialkyl anilines by Friedel-Crafts reaction using AlCl3 as Lewis acid and dichloroacetyl chloride as acylating agent.
No scrambling in the synthesis of meso-substituted porphyrins from one dipyrromethane and aryl aldehydes
Authors: Suga Yasuhiro , Arimura Takashi , Ide Seiji , Nishioka Takuya , Sugihara Hideki , Murata Shigeo , Tsuzuki Hirohisa
Published: December 2009

The cross-condensation of dipyrromethane 1 and aryl aldehydes in the presence of trichloroacetic acid in CH2 Cl2 afforded non-scrambled products in good yields for the first time.
Self-assembly of novel supramolecular networks formed by 1-[(1-propyl)iminomethyl]-2,4-dihydroxybenzene
Authors: Rafelt J.S. , Clark J.H. , Macquarrie D.J. , Boxwell C.
Published: December 2009

The condensation of propylamine and 2,4-dihydroxybenzaldehyde in absolute ethanol leads to the formation of a unique supramolecular structure, whose crystal structure is reported here. The material displays an unusual synergistic combination of intra- and intermolecular hydrogen bonding.
The effect of 4′-substituents on the kinetics of ligand substitution in 2,2′: 6′,2″-terpyridine platinum(II) complexes
Authors: Carr Carolyn A. , Richards Jonathan M. , Ross Steven A. , Lowe Gordon
Published: December 2009

The rates of hydrolysis of five (4′-substituted-2,2′:6′,2″-terpyridine) platinum(II) (n-propylamine) complexes exhibit a high sensitivity to the electronic properties of the terpyridine ligand; analysis using the Hammett relationship gives a ρ value of +2.34.
A facile preparation of 1-benzoselenopyrylium salts1
Authors: Sashida Haruki , Minamida Hiroshi
Published: December 2009

The general preparation of unsubstituted and 2-substituted 1-benzoselenopyrylium salts 4 from the selenochromen-4-ones 1 via the selenochromenes 2 or 3 is investigated. The properties associated with the stability of the selenopyrylium salts 4 are elucidated.
Samarium (III) iodide promoted preparation of α,α′-bis (substituted benzylidene)cyclohexanones from benzaldehydes and cyclohexanone
Authors: Li Zhifang , Zhang Yongmin , Li Qiaoling
Published: December 2009

Promoted by SmI3, cyclohexanone condenses with benzaldehydes in the presence of catalytic amount of SiMe3Cl (TMSCl) to give 2,6-bis(substituted benzylidene)cyclohexanones under mild conditions in good yields.
Simple and stereoselective synthetic route to (E)-1-alkenyl sulfoxides via terminal alkynes
Authors: Zhong Ping , Guo Meng-Ping , Huang Xian
Published: December 2009

Terminal alkynes 1 react with Cp2Zr(H)Cl (Cp = η5-C5H5) to give organozirconium (IV) complexes 2, which are trapped with sulfuryl chloride to afford (E)-1-alkenyl sulfoxides 3.
Synthesis of novel 2,5-dihydro- and 2,3,4,5-tetrahydro-1,2,4-triazin-5-ones from 2-arylhydrazonoacetamides and orthoesters
Authors: Belskaia Natalia P. , Zvereva Ekaterina E. , Dehaen Wim , Bakulev Vasiliy A.
Published: December 2009

Reactions of 2-arylhydrazonoacetamides 1 with orthoesters were shown to give, depending on the structure of the hydrazone and the reaction conditions, either 2,3,4,5-tetrahydro-1,2,4-triazin-5-ones 2 or 2,5-dihydro-1,2,4-triazin-5-ones 3, which are very susceptible to hydrolysis to form 2-arylhydrazono-N-acylacetamides 4.
Metal ions binding by chelating ligands from new polymer bearing amidoxime functional groups
Authors: Lutfor M. R. , Silong S. , Yunus W.M.Z. Wan , Rahman M.Z.A. , Ahmad M.B. , Haron M.J.
Published: December 2009

A new polymer bearing amidoxime chelating resin was prepared from polyacrylonitrile (PAN) grafted sago starch and the significant binding capacity of metal ions by the resin was observed with a rapid sorption rate.
A facile aromatic C-benzylation with phosphorodithioate esters under Friedel-Crafts conditions
Authors: Goswami Amrit
Published: December 2009

Benzyl or substituted benzyl phosphorothionothiolates (1a–f) on treatment with anhydrous aluminium chloride in benzene at reflux temperature undergo cleavage of the C-S bond with formation of aromatic ring benzylated products (2a–f) in very good yield.
Synthesis of a solvatochromic triphenylphosphonium-p-toluenesulfonaminido betaine
Authors: Allen David W. , Coles Simon J. , Hursthouse Michael B.
Published: December 2009

The synthesis, crystal structure, and negative solvatochromism of the triphenylphosphonium- p-toluenesulfonaminido betaine (4) are described.
Allylation of Hydrates of Aldehydes and Activated Aromatic Aldehydes with Allyltrimethylsilane in H2O-CH3CN catalyzed by Sc(OTf)3
Authors: Wang Ming-Wen , Chen Yong-Jun , Liu Li , Wang Dong , Liu Xiao-Ling
Published: December 2009

Sc(OTf)3-catalysed allylations of hydrates of α-keto aldehydes and glyoxylates and activated aromatic aldehydes with allyltrimethylsilane in H2O–CH3CN were examined. α-Keto and α-ester homoallylic alcohols 3a–d and aromatic homoallylic alcohols 3e–f were obtained in good to excellent yields, depending on the reaction temperature and the ratio of H2O to CH3CN in co-solvent.
Synthesis and Characterization of 1,2-bis(1-mercapto-4, 7,10-trioxaundecyl)-glyoxime and Ni|| and Pd|| complexes
Authors: Dabak Salih , Ahse Vefa
Published: December 2009

Oligoethyleneoxythia functional vic-dioxime and complexes with Ni(II) and Pd(II) are prepared starting from 1-mercapto-4,7,10-trioxaundecane by the reaction of ( E,E)-dichloroglyoxime.
Efficient and selective protection of aldehydes as geminal diacetates using LiBr
Authors: Kumar H.M. Sampath , Reddy B.V. Subba , Reddy P. Thirupathi , Yadav J.S.
Published: December 2009

A variety of aldehydes react with acetic anhydride in presence of lithium bromide at room temperature to afford the corresponding 1,1-diacetates in quantitative yields within a few hours of reaction time.
The Crystal Structure of 1-phenyl-3-methyl-5-[2′-(4″-phenylmethoxylphenyl) ethoxyl]pyrazole, a potential insect juevnile hormone mimic
Authors: Dianqing Sun , Zhong Li , Xuhong Qian
Published: December 2009

The crystal structure of 1-phenyl-3-methyl-5-[2′-(4″-phenylmethoxylphenyl)ethoxyl] pyrazole, a potential JH mimic, has been established; the crystal belongs to the triclinic system with z = 2, and the distance between C(25) and H(14) (19.64Å), an important steric factor, which is very near the optimum value (21Å) for JH activity expression, may yield an explanation to the potential bioactivity of the new pyrazole compound.
The Synthesis of α, β–Dehydroamino Acid Esters from Hydroxyamino Esters using Haloacetyl Halides
Authors: Goodall Karen , Parsons Andrew F.
Published: December 2009

The preparation of dehydroamino acid esters from reaction of β–hydroxy–α–amino esters with dichloroacetyl chloride, chloroacetyl chloride or trichloroacetyl chloride in the presence of base has been investigated.
Investigation of Structural Properties of Heteropropellane Compounds by ab initio methods
Authors: Ebrahimi Ali , Deyhimi Farzad , Roohi Hosein
Published: December 2009

Molecular structure and relative stability of the ground state of [1.1.1] propellane, various [1.1.1] heteropropellane compounds and also their respective hydrogenated bicyclo compounds along with inversion barrier energy of nitrogen and its corresponding transition state in some of these compounds have been determined using ab initio molecular orbital and hybrid HF-density functional methods.
Semi-Synthesis of Triterpene A-ring Derivatives from Oleanolic and Maslinic Acids. Theoretical and experimental 13C chemical shifts
Authors: García-Granados Andrés , Dueñas José , Moliz Juan N. , Parra Andrés , Pérez Felipe L. , Dobado J.A. , Molina José
Published: December 2009

Oleanolic and maslinic acids were isolated from solid waste from olive oil and several derivatives were semi-synthesised using typical reaction procedures. Experimental and theoretical (GIAO, B3LYP/6-31G*//MM+) 13C NMR chemical shifts for 21 compounds are given.
New dicopper(II/II) Complexes with Oxygen and Sulfur Bridges: Synthesis, Characterization and Cyclic Voltammetric Studies
Authors: Mukhopadhyay Uday , Ray Debashis
Published: December 2009

A new family of acetato oxygen and dithiocarbonato sulfur bridged dinuclear copper(II) complexes with weak imidazolidine bridge support is described for the first time; these complexes are studied for possible synthetic models of dicopper active sites.
2-Aza [2,2,1] Bicyclo Heptane Derivatives: Ring Expansion, Fragmentation and Synthesis of a Potential TxA2 antagonist
Authors: Perrin Véronique , Riveron Véronique , Balme Geneviéve , Gore Jacques
Published: December 2009

The synthesis of N-tosyl 2-aza [2,2,1] bicycloheptane substituted in 3-position by the α-chain of prostaglandins is described. This synthesis allowed the observation of two valuable transformations of the bicyclic framework: a ring expansion to a 2-aza [3,2,1] bicyclooctane derivative and a fragmentation to cis-1,3 disubstituted cyclopentyl amines.
A Study on the β-Elimination Reaction from N-[2-(p-nitrophenyl)ethyl]quinuclidinium and 2-(p-nitrophenyl)ethyl bromide induced by amines in dimethylsulfoxide with formation of p-nitrostyrene
Authors: Alunni Sergio , Rocchi Arianna
Published: December 2009

Second order rate constants kE M−1 s−1 for the β-elimination reaction from N-[2-( p-nitrophenyl)ethyl]quinuclidinium and 2-( p-nitrophenyl)ethyl bromide induced by amines of different structure in dimethylsulfoxide at 50 °C have been measured. Application of the Brønsted equation shows a similar behaviour of the two substrates, with values of β = 0.649 and 0.584 respectively.
The First Metal Complexes of 1,4-Oxatellurane: Synthesis and Crystal Structure of its Platinum(II) complex
Authors: Singh Ajai K. , Kadarkaraisamy M. , Husebye S. , Tornroos Karl W.
Published: December 2009

The palladium(II) and platinum(II) complexes of 1,4-oxatellurane (L), having the composition [MCl2L2], are synthesized and characterized spectroscopically and structurally (Pt complex only; Pt–Cl 2.3169(9) Å; Pt–Te 2.5945(3) Å) for the first time.
Autoxidation of α-santalene
Authors: Ngo Koon-Sin , Brown Geoffrey D.
Published: December 2009

Fifteen compounds (2 – 11) have been isolated from the spontaneous slow autoxidation of the tri-substituted double bond in the side-chain of the tricyclic sesquiterpene α-santalene; most of these compounds have also been reported as natural products.
Intramolecular Mannich Reaction for Synthesis of Imidazo-[2,1-b]-1,3,5-Thiadiazines and 1,2,4-Triazino[3,2,-b]-1,3,5-Thiadiazines
Authors: Hozien Zeinab A.
Published: December 2009

New imidazo[2,1-b]-1,3,5-thiadiazines and 1,2,4-triazino[3,2,-b]-1,3,5-thiadiazines, which have been prepared in good yields under Mannich reaction conditions. The antibacterial activity of some compounds have been evaluated.
Synthesis of Taurine Analogues. Part 1: 2-Aminosulfonic Acids from Alkene–sulfur Monochloride Adducts
Authors: Machetti Fabrizio , Cacciarini Martina , Catrambone Fernando , Cordero Franca M. , Romoli Simone , De Sarlo Francesco
Published: December 2009

(±) Trans-2-aminocyclohexanesulfonic acid and (±) trans-2-aminocyclopentanesulfonic acid were prepared respectively from cyclohexene and cyclopentene by sulfur monochloride addition, followed by oxidation to 2-chlorosulfonic acid and substitution of chlorine.
Regeneration of Carbonyl Compounds from Oximes on Clayfen under Conventional Heating and Microwave Irradiation
Authors: Heravi Majid M. , Ajami Dariush , Mojtahedi Mohammad M.
Published: December 2009

A new and effecient method for cleavage of oximes has been achieved by a simple reaction of an oxime with clayfen in dichloromethane and under microwave irradiation in solventless system.
Stereochemistry of Aldol Condensation of N,N-dialkyl Amides with Aromatic Imines. Highly Diastereoselective Synthesis of β-Amino Acid Dialkylamides
Authors: Viteva Lilia Z. , Gospodova Tz. S. , Stefanovsky Y. N.
Published: December 2009

Aldol condensation of amide enolates with imines affords β-amino acid dialkylamides in both high yields and excellent threo diastereoselectivity; electronic factors seem to be of great importance for successful interaction.
Friedel-Crafts Benzylation of 1,4-dialkoxybenzenes – Cleavage and Rearrangement of Esters and Methoxymethyl Ethers in ZnCl2 Montmorillonite K10 Clay
Authors: Waterlot C. , Couturier D. , Hasiak B.
Published: December 2009

Benzylation of p-dialkoxybenzenes can be achieved through the use of modified montmorillonite K10 clay. For the first time, syntheses of nitro-diarylmethanes were obtained by Friedel-Crafts alkylation with good yields. In the case of p-methoxymethyl phenyl ether and phenyl ester, selectivity favoring Fries rearrangement over benzylation is reported.
Study on the addition of hydrogen fluoride to 2′,2′-difluorostyrenes
Authors: Lee Chuan-Chen , Lin Shaw-Tao
Published: December 2009

2,2,2-Trifluoroethylarenes were obtained in good yield from the addition of KF to 2′,2′-difluorostyrenes in the presence of crown ether. A linear regression line obtained from correlation between log(reaction rate) and Hammett constants with slope of +4.28 suggested that this addition process is very sensitive to the substituents on the phenyl ring.
A Convenient Method for One Step Oxidative Decarboxylation by KMnO4 in Non Aqueous Media
Authors: Ataei Shahram Mehdipour
Published: December 2009

A simple and efficient method for one step oxidative decarboxylation of some aromatic carboxylic acids, using potassium permanganate in non-aqueous media is described.
Phase-transfer Catalysed Reactions of Mono- and disubstituted N-(benzylidene)-benzylamines with cinnamic acid derivatives
Authors: Pashkuleva Iva , Dryanska Veneta , Angelova Silvia , Simova Svetlana
Published: December 2009

Tert-butyl esters 3 and 3-cyanopyrrolidines 6 are prepared by phase-transfer-catalysed reactions of symmetrical 4,4′-disubstituted N-(benzylidene)benzylamines with tert-butyl cinnamate and α-phenylcinnamonitrile, respectively; similar reactions of mono-substitited N-(benzylidene)benzylamines afforded mixtures of compounds 3, respectively 6, and their regioisomers 3(A) and 6(A).
Synthesis of Some 2,3-anhydro and 3-mesyl Nucleosides
Authors: Abdel-Megied Ahmed E.-S.
Published: December 2009

The reaction of sugar 1 with silylated 5-alkoxymethyluracils 2a-c afforded 3a–c. Compounds 5a–c, 6a,b, 7a–c and 8c were prepared. Treatment of 4a,b with tris (1H-1,2,4-triazole-1-yl) phosphine oxide and subsequent reaction with ammonia in dioxane, then with sodium methoxide yielded 9a,b.
Studies with Functionally Substituted Heteroaromatics: A New Routes for Synthesis of Pyridazino[2,3-a] Quinazoline and Pyridazino-6-imine Derivatives
Authors: Al-Zaydi Khadijah M. , Hafez Ebtisam A. , Elnagdi Mohamed H.
Published: December 2009

Enaminones couple with diazotized anthranilic acid derivatives yielding 2-arylhydra-zonopropanals that condensed with active methylenes yielding condensed pyridazines.
Synthesis of novel 1,10-phenanthroline-2,9-bis-α-amino acid conjugates
Authors: Wang Zhong-Ming , Lin Hua-Kuan , Zhou Zhi-Fen , Zhu Shou-Rong , Liu Tian-Fu , Chen Yun-Ti
Published: December 2009

Starting from 2,9-dimethyl-1,10-phenanthroline, the syntheses of eight novel 1,10-phenanthroline-2,9-bis-α-aminoacid conjugates (α-amino acids: DL-Ala, L-Val, L-Phe, L-His, L-Ile, L-Met, L-Glu, L-Asp) are described in detail.
Cerium (IV) sulfate mediated oxidative addition of 1-phenylcycloalkenes and styrene derivatives in methanol: Synthesis of 1,2-dimethoxy compounds
Authors: He Liangyou , Horiuchi C. Akira
Published: December 2009

The reaction of 1-phenylcycloalkenes and derivatives of styrene with cerium(IV) sulfate tetrahydrate in methanol leads to the formation of 1,2-dimethoxy compounds (54–89%).
Amberlyst A-26 suppported peroxodisulfate. Part 1: An efficient reagent for selective carbon–nitrogen double bond cleavage of oximes
Authors: Lakouraj M. M. , Bahrami K.
Published: December 2009

Convenient and efficient method for the selective deoximation reaction is described using amberlyst A-26 supported peroxodisulfate.
Oxidation of alcohols and primary aliphatic amines to carbonyl compounds using sodium hypochlorite adsorbed on montmorillonite K10
Authors: Hashemi Mohammed M. , Beni Yousef A.
Published: December 2009

NaClO adsorbed on montmorillonite K10 converts alcohols and primary aliphatic amines into corresponding carbonyl compounds.
A facile route to amino-azines
Authors: Rostamizadeh Shahnaz , Keshavarz Housainali
Published: December 2009

Amino-azines have been prepared from S-methylisothioamide hydroiodides and hydrazones in high yields.
Zn–AlCl3.6H2O–THF system: A mild and convenient reducing agent for isoxazolidines to 1,3-amino alcohols
Authors: Boruah Monalisa , Konwar Dilip
Published: December 2009

The Zn–AlCl3.6 H2O–THF system reduces isoxazolidines to 1,3-amino alcohols at room temperature
Chromone studies. Part 10.1 Substituent effects on the basicity of 2-(N,N-dimethylamino)chromones
Authors: Kaye Perry T. , Nchinda Aloysius T. , Sabbagh Liezel V. , McCleland Cedric W.
Published: December 2009

The pKa values for a series of 12, substituted 2-(N,N-dimethylamino)chromones have been determined by potentiometric titration and found to lie within a narrow range (1.92–2.52), protonation of the carbonyl oxygen being supported by 13C NMR data and semi-empirical and ab initio calculations.
Effect of microwave irradiation on the formation of bicyclic cyclopropane derivatives
Authors: Finta Zoltán , Hell Zoltán , Tôke László
Published: December 2009

Microwave irradiation changes the diastereomeric composition of the bicyclic cyclopropane carboxylic acid lactones obtained in the intramolecular cyclization of malonic acid allylic esters in a phase transfer catalysed reaction.
Polyheterocyclic Ring Systems with Bridgehead Nitrogen Atoms: A Facile Route to Some Novel Azolo-1,2,4-triazine Derivatives
Authors: Dawood Kamal M. , Farag Ahmad M. , Ragab Eman A. , Kandeel Zaghloul E.
Published: December 2009

The synthesis of the entitled azolo-1,2,4-triazines via the reaction of some functionalized thiazole derivatives with several heterocyclic diazonium salts is described.
Samarium (ii) iodide promoted reductive coupling of ketones and imines
Authors: Ma Yongmin , Zhang Yongmin , Zhou Longhu
Published: December 2009

The cross-coupling reactions of imines with aromatic ketones induced by SmI2/THF system were studied; 2-amino alcohols are prepared in good yields under refluxing conditions.
Protection of phenols as t-butyl ethers under mild conditions
Authors: Bandgar B.P. , Kasture S.P.
Published: December 2009

Zinc mediated selective O-y-butylation of phenols has been carried out in good to excellent yields under mild conditions. No trace of C-t-butylation was observed.
The synthesis of alkylamino-N-alkylnaphthalic-1,8-imides from 2- and 4-nitronaphthalic anhydrides by nitro group displacement
Authors: Alexiou Michael S , Tyman John H P
Published: December 2009

4-Alkylamino-N-alkylnaphthalic-1,8-imides and 2-alkylamino isomers have been synthesised by the reaction of 4-nitro- and 2-nitronaphthalic anhydrides respectively with primary amines in aprotic solvents in which reaction the nitro group in 3-nitronaphthalic anhydride is unreactive. Unsymmetrical compounds in the 2- and 4-series are derived from either the appropriate 4-nitro-N-alkylnaphthalic-1,8-imide or for 4-dialkylamino compounds from 4-nitronaphthalic anhydride by reaction with a secondary amine and then the 4-dialkylaminonaphthalic anhydride with a primary amine.
Semi-synthesis of triterpene A-ring derivatives from oleanolic and maslinic acids. Part II. Theoretical and experimental 13C chemical shifts†
Authors: García-Granados Andrés , Dueñas José , Melguizo Enrique , Moliz Juan N. , Parra Andrés , Pérez Felipe L. , Dobado J.A. , Molina José
Published: December 2009

Maslinic acid was obtained from olive-pressing residues, and several derivatives were formed. Rearrangements of 2-tosyloxy-derivatives of methyl maslinate made out by acetolysis. The main product of these rearrangements contained a cyclopentanic A-ring as a result of a concerted 2(3) → 4-abeo rearrangement process. Experimental and theoretical (GIAO, B3LYP/6-31G*//MM+) 13C NMR chemical shifts for 20 compounds are given.
Kinetics and mechanism of osmium (VIII) catalysed oxidation of formic acid by hexacyanoferrate (III) in aqueous alkaline medium
Authors: Sharma Gayatri , Binyahia A.R. , Sharma P.D.
Published: December 2009

The kinetics of osmium (VIII) catalysed oxidation of formic acid by hexacyanoferrate (III) in alkaline medium is investigated.
The Ag+ selective electrode properties of benzo-diselena selena-13-to 14-crown-4
Authors: Liu Yu , Zhang Heng-Yi , Chen Lang-Xing , He Xi-Wen
Published: December 2009

Ion selective electrodes (ISE) for Ag+, containing 1,2-benzo-7,11-diselena-1,4-dioxacyclotridecan-2-ene (1) and (2,3-benzo-7,12-diselena-1,4-dioxacyclotetradecan-2-ene) (2) in a PVC membrane as neutral carrier, were prepared, and their selectivity coefficients for Ag+ (KpotAg,M) against other heavy metal ions, alkali and alkaline-earth metal ions, and ammonium ion were determined to show excellent Ag+ selectivities.
A simple synthesis of highly functionalized ketenimines
Authors: Yavari Issa , Nourmohammadian Farahnaz
Published: December 2009

A one-pot synthesis of highly functionalized ketenimines by reaction of alkyl isocyanides with dialkyl acetylenedi-carboxylates in the presence of methyl 2-acetyl-3-oxobutanoate is reported.
A Novel Method for Pinacolic Coupling of Aromatic Aldehydes and Ketones with a Sm–Zncl2 System
Authors: Guo Hongyun , Zhang Yongmin
Published: December 2009

Sm–ZnCl2-system-mediated reductive coupling of aromatic aldehydes and ketones in THF–H2O at room temperature affords the corresponding pinacols in moderate to good yields.
Reactions of 1,2- and 1,3-Dimethoxy- and 1,3,5-Trimethoxybenzene with Nitrogen Dioxide/Dinitrogen Tetraoxide in Dichloromethane
Authors: Gowenlock Brian G , King Boyd , Pfab Josef
Published: December 2009

The products of reaction of nitrogen dioxide/dinitrogen tetraoxide with dichloromethane solutions of three different methoxybenzenes are studied and interpreted in terms of initial nitrosation followed by oxidation with nitrogen dioxide.
Synthesis of Substituted 2-Bromo Phenols using a Novel Bromination-Dehydrobromination Reaction
Authors: Coumbarides Gregory S. , Dingjan Marco , Eames Jason , Weerasooriya Neluka
Published: December 2009

Substituted 2-bromo-phenols can be synthesised by heating substituted cyclohexanones in neat diethyl dibromomalonate at 100°C. We discuss the efficiency of such a procedure and comment on the possible mechanism.
A Novel Polycyclic System: Synthesis of 1,3,5-Tri(1-Azulenyl)Benzenes by Cyclotrimerization of 1-Acetylazulenes
Authors: Sato Kumi , Yamashiro Satoko , Imafuku Kimiaki , Ito Shunji , Morita Noboru , Fujimori Kunihide
Published: December 2009

Synthesis of 1,3,5-tri(1-azulenyl)benzene was accomplished by tetrachlorosilane-mediated cyclotrimerization of 1-acetyl-3-methoxycarbonylazulene followed by de-esterification.
Electron Paramagnetic Evidence for the ·pf3 Radical Anion
Authors: Symons Martyn C.R.
Published: December 2009

Although ·PF2 radicals have been extensively studied there does not seem to be any spectroscopic evidence for ·PF3-radical anions. Here it is proposed that an EPR spectrum previously assigned to ·PF2 radicals is almost certainly due to ·PF3-centres. The 31P and 19F hyperfine coupling constants for these radicals are expected to be very similar. However, the ·PF3-radicals should show an extra coupling to the third 19F nucleus. This is clearly present.
Surface-Mediated Chemospecific Hydrobromination of Limonene: Stereoselective transformation of the enantiomers of Limonene into α-Terpinyl Bromide
Authors: Sanseverino Antonio Manzolillo , de Mattos Marcio C.S. , Kover W. Bruce
Published: December 2009

(R) and (S)-α–terpinyl bromide can easily be prepared in excellent yields by reaction of (R) and (S)-limonene, respectively, with PBr3 / SiO2 in dichloromethane.
The reaction of Tms-Cf3 with Amino Acid Derived Ring-Templates: Studies with Oxazin-2-Ones and Oxazolidin-5-Ones
Authors: Walter Magnus W. , Thaker Neh , Baldwin Jack E. , Müller Matthias , Schofield Christopher J.
Published: December 2009

The reaction of TMS-CF3 with oxazin-2-ones and oxazolidin-5-ones and its dependency on steric factors was investigated.
Hypervalent Iodine in Synthesis 58: Synthesis of Aryl esters of Dithiocarbamic Acids Using Polymeric Diaryliodonium Salts
Authors: Chen Da-Jun , Chen Zhen-Chu
Published: December 2009

Polymer-supported diaryliodonium salts were prepared and employed as aryl transfer reagents for the synthesis of aryl esters of dithiocarbamic acids.
Liquid and Solid Acids as Catalysts for the Thiele–Winter reaction of Menadione
Authors: Villemin Didier , Bar Nathalie , Hammadi Mohamed , Hachemi Messaoud
Published: December 2009

Liquid acid such as perchloric acid, chlorosulfonic or triflic acid can effectively replace sulfuric acid as a catalyst in Thiele–Winter reaction of menadione. Solid acids like zeolites and heteropolyacids are described for the first time as catalysts in Thiele–Winter reaction. The two step sequence (Thiele–Winter), saponification–oxidation) constitutes a new synthesis of the antibiotic phthiocol from menadione.
Synthesis of Σ-Bonded [60]Fullerene Metallacycle Compound η2-Σ-C60[Moη 5-Eto2Cc5H4)(Co)2]2(Dppe) Via Reaction of K2C60 and [η 5-Eto2Cc5H4(Co)2Moi]2(Dppe)
Authors: Song Li-Cheng , Zhu Ying-Huai , Hu Qing-Mei
Published: December 2009

The first σ-bonded [60]fullerene organometallic complex metallacycle η2-σ-C60[Mo(η5-EtO2CC5H4) (CO)2]2 (dppe) (dppe=Ph2PCH2CH2PPh2) is synthesized by reaction of K2C60 with a new electrophile η5-EtO2CC5H4(CO)2MoI2(dppe), both of which have been characterized by elemental analysis and spectroscopy.
Synthesis of 3C,4R,5T-1,2-Dimethyl-3,5-Diaryl Pyrazolidine-4-Carboxylic Acid via Intermolecular [3++2] Cycloaddition
Authors: Liu Ligang , Ji Min , Hua Weiyi , Liu Hong
Published: December 2009

1,2-Dimethyl-3,5-diarylpyrazolidine-4-carboxylic acid derivatives 4a–d were synthesised stereo-selectively via intermolecular [3++2] cycloaddition of aldehydes 1a–d and 1,2-dimethylhydrazine dihydrochloride (2) with ethyl trans-cinnamate (3), stereochemistries of which were assigned by 1H-NOESY spectroscopy, and relative configurations confirmed by X-ray diffraction of one of them (4a).
A New Route to 2,3-Dihydro-1,5-Benzothiazepines from Nitrodisulfides and α,β-Unsaturated Ketones by Smi2
Authors: Chen Xiaoyuan , Zhong Weihui , Zhang Yongmin
Published: December 2009

Nitrodisulfides on treatment with SmI2 in anhydrous THF at room temperature lead to reactive intermediates, which are “living” double-anions and react smoothly with α,β-unsaturated ketones to afford 2,3-dihydro-1,5-benzothiazepines in good yields under mild and neutral conditions.
Solvent-Free preparation of Monoacylaminals Assisted by Microwave Irradiation
Authors: Sharifi Ali , Mohsenzadeh Farshid , Naimi-Jamal M. Reza
Published: December 2009

Reaction of amide 1, aldehyde 2, and amine 3 promoted by microwave irradiation produced monoacylaminals 4 up to 100% yield in a short time under solvent-free conditions.
Stereoselective synthesis of (2R, 3R)- and (2S, 3S)-2-(4-Hydroxyphenyl)-3-Hydroxymethyl-1,4-Benzodioxan-6-Carbaldehyde
Authors: Gu Wenxin , Chen Xiaochuan , Jing Xiaobi , Pan Xinfu
Published: December 2009

A novel stereoselective synthetic approach to 1,4-benzodioxane lignans was reported in which (2R, 3R)- and (2D, 3S)-2-(4-hydroxyphenyl)-3-hydroxymethyl-1,4-benzodioxan-6-carbaldehyde were first synthesised.
Structure and Photophysical properties of Constrained Donor-Acceptor [2]Catenanes Bearing An Appended Secondary Donor
Authors: Benniston Andrew C. , Gardner Struan , Farrugia Louis J. , Harriman Anthony
Published: December 2009

The synthesis of three donor–acceptor [2]catenanes are reported, along with their photophysical properties as measured using the technique of time-resolved transient absorption spectroscopy.
Ultrasound-Promoted Samarium/Ammonium Chloride Mediated Reductive coupling of Aromatic Ketones
Authors: Basu Manas K. , Becker Frederick F. , Banik Bimal K.
Published: December 2009

Ultrasound-promoted samarium/ammonium chloride mediated reductive coupling of aromatic ketones was investigated.
An Efficient and Selective conversion of Hydrazides into Esters and Acids
Authors: Srinivas R. , Reddy B.V. Subba , Yadav J.S. , Ramalingam T.
Published: December 2009

Hydrazides are selectively oxidised to esters/acids in high yields using Oxone® in the presence of an appropriate alcohol/water as a nucleophile at ambient temperature. A variety of functional groups including alkenes, alcohols, ethers, cyclopropyl groups and nitriles are unaffected.
A computational study of the conformational equilibria of α-phenoxy, α-phenylthio, α-phenylseleno substituted cyclohexanones
Authors: Duran Dilek , Şenyurt Nurcan , Aviyente Viktorya
Published: December 2009

α-XH and α-Xϕ substituted and cyclohexanones (X= O, S, Se) are studied in order to understand the nature of the stabilizing and destabilizing interactions in these compounds.
Rapid and efficient palladium catalysed reduction of aryl halides by triethylsilane under microwave irradiation
Authors: Villemin Didier , Nechab Belkacem
Published: December 2009

Triethylsilane in presence of catalytic amount of palladium chloride is an efficient and selective system for reductive dehalogenation of aryl halides under microwave irradiation.
Liquid-phase and biphasic chlorination of some iodoarenes to form (dichloroiodo)arenes with sodium peroxodisulfate as the oxidant
Authors: Baranowski Andrzej , Płachta Dariusz , Skulski Lech , Klimaszewska Marzena
Published: December 2009

Liquid-phase and biphasic (CCl4/concd hydrochloric acid) chlorination of some iodoarenes to form the corresponding (dichloroiodo)arenes, prepared in 60–100% crude yields, are reported; dichlorine is produced as follows: Na2S2O8 + 2 HCl (conc. aq.) → Cl2 + 2 NaHSO4.
Acid catalysed rearrangement of Δ9,15-africanene: A cytotoxic sesquiterpene
Authors: Reddy N. Srinivasa , Goud T. Venkateshwar , Venkateswarlu Y.
Published: December 2009

Acid catalysed rearrangements of Δ9,15-africanene, a cytotoxic sesquiterpene isolated from the soft corals of the genus Sinularia, have been studied for the first time and a marked difference was observed between the compositions of the conversion products with and without refluxing conditions.
The preparation of 3-substituted 1-chlorocarbonyl-imidazolidin-2-ones using bis(trichloromethyl) carbonate
Authors: Su Weike , Zhang Yongmin
Published: December 2009

A novel synthesis of 3-substituted 1-chlorocarbonyl-imidazolidin-2-ones using bis(trichloromethyl) carbonate is reported. The bis(trichloromethyl)carbonate is used to generate phosgene in situ in stoichiometric amounts. The yields and purity of the products obtained are better than those obtained by a conventional way using phosgene.
Solid Phase N-alkylation of Tetrazoles: A Thermal Decarboxylation
Authors: Dabbagh Hossein A. , Mansoori Yagoub , Jafary Mehrdad , Rostami Mahboubeh
Published: December 2009

On solid-phase thermal decarboxylation 2-methoxycarbonyl-5-aryloxytetrazoles release carbon dioxide to produce the corresponding 1- and (predominantly) 2-methyl-5-aryloxytetrazoles in high yields and short reaction times.
Study on the reaction of the anionic copper selenolate complex [Me4N]2[Cu4(SePh)6] with CS2 in solvents; the crystal structure of a polymeric complex [CuS2COMe]n(I)
Authors: Tang Kaluo , Jin Xianglin , Long Yaoling , Cui Peng , Tang Youqi
Published: December 2009

The anionic copper selenolate complex [Me4N]2[Cu4(SePh)6] reacted with CS2 in solvents CH3CN/CH3OH or DMF/CH3OH producing an uncharged two-dimensional layer polymeric complex [Cu(S2COMe)]n(I) and a mononuclear complex [Cu(S2CNMe2)2] (II), respectively. The crystal structure of (I) is reported.
A facile synthesis of Δ7,9(11)-steroidal dienes
Authors: Aksara Nida , Kizito Stephen A. , Parish Edward J.
Published: December 2009

Treatment of Δ7-steroids, dissolved in benzene, with sulfuryl chloride resulted in the formation of steroidal Δ7,9(11)-in good yields.
Spectroscopic study on the photochromism of Schiff base N-salicylidene-α-methylbenzylamine
Authors: Zhao Jianzhang , Zhao Bing , Liu Juzheng , Li Tingyou , Xu Weiqing
Published: December 2009

The photochromism of Schiff base N-salicylidene-α-methylbenzylamine has been studied by time-dependent UV–Vis absorption and fluorescence spectroscopy.
Synthesis of N-substituted derivatives of tert-butyl 4-aminobenzoate via a palladium-catalysed reaction
Authors: Bavetsias V. , Henderson E.A.
Published: December 2009

Amination of tert-butyl 4-bromobenzoate using PdCl2 (7% mol) and P(o-tolyl)3 provides a convenient route to N-substituted derivatives of tert-butyl 4-aminobenzoate.
Synthesis, X-ray structure and spectroscopic studies of Mo(O)2(3,5-di-tert-Busap)(EtOH)
Authors: Jerzykiewicz Lucjan B. , Sobczak Jarosław M. , Ziółkowski Józef J.
Published: December 2009

A new six-co-ordinate cis-dioxomolybdenum(VI) complex [Mo(O)2 (3,5-di-tert-Busap) (EtOH)], (where 3,5-di-tert-Busap2- = the Schiff base dianion 3,5-di-tert-butyl-N-salicylidene-2-aminophenolate), has been prepared. The complex is characterised by IR, 1H and 13C NMR and UV/vis spectroscopy and is stable to air, but above 413 K or in non-co-ordinating solvents loses an ethanol molecule, forming an dimeric compound with an unsymmetrical dioxygen bridge as indicated by IR spectroscopy.
Preparation of 2,5-iminoazepines via the imine–ene reaction of 3-allylamino-2-(substituted)acrolein imines
Authors: Takamura Shinji , Yamada Hisashi , Michinaka Takanori , Yamamoto Hidetoshi , Kakehi Akikazu , Noguchi Michihiko
Published: December 2009

Malonaldehyde derivatives 1 and 2 with an excess of allylamine (3a) in refluxing toluene gave 2,5-iminoazepines 6a and 9a in moderate yields via the thermal imine–ene reaction of the initially formed vinamidines 5a and 8a.
Use of a new hydrophilic phosphine: DPPPA. Rapid and convenient Heck reaction in aqueous medium under microwave irradiation
Authors: Villemin Didier , Nechab Belkacem
Published: December 2009

A new water soluble phosphine-ligand: diphenylphosphinyl) phenylphosphonic acid (DPPPA) was used in Heck reaction. The Heck reaction is efficiently and rapidly achieved by a palladium-catalysed reaction in water performed in a Teflon autoclave under microwave irradiation with a commercial microwave oven. The log P was used for correlating the solubility of the aryl iodide in water with the observed yield.
A Convenient Method for the Reductive Desulfonylation of Some Sulfones by the Sm/HOAc System
Authors: Guo Hongyun , Zhang Yongmin
Published: December 2009

Metallic samarium can be used in desulfonylation in the presence of glacial acetic acid. The reaction is illustrated here for nine substrates, which include α-phenylsulfonyl cinnamonitriles, β-ketosulfones and phenylsulfonyl cycloheptane.
An Efficient Benzyltriethylammonium Chloride Catalysed Preparation of Electrophilic Alkenes: A Practical Synthesis of Trimethoprim
Authors: Bose D. Subhas , Narsaiah A. Venkat
Published: December 2009

The Knoevenagel condensation of carbonyl compounds with active methylene compounds was readily carried out with benzyltriethylammonium chloride as a catalytic agent, under solvent-free conditions to produce olefinic products in high yields: the scope of this protocol is utilised for the synthesis of the antibacterial agent trimethoprim.
Ru(III) inhibition on the oxidation of anilines with HOOSO3-
Authors: Meenakshisundaram Subbiah , Sathiyendiran V.
Published: December 2009

Ligation to metal centre does inhibit aniline oxidation with HOOSO3- in the presence of Ru(III).