bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Binuclear Ruthenium(Ii) Complexes of Amide Ligands with Two Bidentate Coordinating Sites
Authors: Dutta Sujit , Bhattacharya Pabitra K.
Published: December 2009

Binuclear ruthenium(II) complexes of binucleating amide ligands (L1–L5), obtained by the reaction of pyridine-2-carboxylic acid with aromatic and aliphatic diamines, have been prepared by the reaction of one equivalent amide ligand with two equivalents of [Ru(dmso)4Cl2]. The complexes are diamagnetic at room temperature. The metal to ligand ratio and the geometry around the ruthenium(II) centres in these complexes have been established with the help of 1H NMR, 13C NMR, IR and positive ion electrospray mass spectral studies.
Hypervalent Iodine in Synthesis 51: A Facile Novel Synthetic Access to Se-Phenyl O,O-Dialkyl Phosphoroselenoates
Authors: Chen Da-Jun , Chen Zhen-Chu
Published: December 2009

O,O-Dialkyl phosphorous acids react at room temperature with phenyliodine diacetate (PID), sodium azide and diphenyl diselenide, to afford Se-phenyl O,O-dialkyl phosphoroselenoates in good yields.
Hypervalent Iodine in Synthesis 56: A Convenient Route for the Synthesis of Thiol Esters via Palladium-Catalysed Alkylthiocarbonylation or Arylthiocarbonylation of Diaryliodonium Salts
Authors: Wang Li , Chen Zhen-Chu
Published: December 2009

Palladium-catalysed alkylthiocarbonylation or arylthiocarbonylation of diaryliodonium salts gives thiol esters in good yields.
A Novel synthesis of Selenosulfides from Diselenides by Samarium Diiodide
Authors: Guo Hongyun , Zhang Yongmin
Published: December 2009

Diselenides were reduced by samarium diiodide in tetrahydrofuran (THF) to produce samarium selenolate. This selenolate anion reacted smoothly with sodium alkyl thiosulfates and phenylsulfenyl chloride to give selenosulfides in moderate to good yields.
An improved synthesis of guanosine 5′-monothiophosphate
Authors: Behrman E. J.
Published: December 2009

A synthesis of guanosine 5′-monothiophosphate which requires no chromatographic purification is described.
A one-pot rapid synthesis of dithiocarbamates from alcohols using a polymer supported diethyl dithiocarbamate anion
Authors: Bandgar B.P. , Sadavarte V.S. , Uppalla L.S.
Published: December 2009

A polymer supported diethyl dithiocarbamate anion reacts with primary and secondary alcohols via their tirfluoracetates giving alkylated diethyl dithiocarbamates in good yields.
Chemoselective N-nitrosation of secondary amines under mild and heterogeneous conditions via in situ generation of NOCl
Authors: Zolfigol Mohammad Ali , Shirini Farhad , Choghamarani Arash Ghorbani , Taqian-Nasab Abolfazl , Keypour Hassan , Salehzadeh Sadegh
Published: December 2009

A combination of inorganic chloride salts [e.g. WCl6, AlCl3 and ZnCl2] and sodium nitrite in the presence of wet SiO2 were used as an effective nitrosating agent for the nitrosation of secondary amines to their corresponding nitroso derivatives under mild and heterogeneous conditions in moderate to excellent yields.
Recent Studies on the Regioselective C-Protonation of Enol Derivatives using Carbonyl-Containing Proton Donors
Authors: Eames Jason , Weerasooriya Neluka
Published: December 2009

Enolate protonation can occur by two different pathways. With strong acids regioselective protonation generally occurs on the oxygen of the enolate to give an enol and then acid catalysed tautomerisation leads directly to the thermody-namically preferred carbonyl motif. However, with much weaker acids kinetic protonation on carbon can occur to give directly the carbonyl derivative. This review discuss recent developments into the use of chelating acids to promote this stereochemically important C-protonation and we comment on factors that appear to promote this selectivity.
Sterically Hindered Iron-Porphyrins as Catalysts in Cyclohexane Oxidation. Steric Effect of Oxygen Transfer from PhIO to Iron(III)-Porphyrins
Authors: Duxiao Jiang , Lingying Song , Shenjie Zhu , Mingde Gui
Published: December 2009

Six sterically hindered chloro meso-tetra-ortho-alkylphenylporphinato iron complexes (T( o-R)PPFe(III)Cl, R=Me, Et, n-Pr, n-Bu, i-Pr, t-Bu) were used to catalyse the monooxygenation of cyclohexane with PhIO. A special steric effect of these alkyl substituents R on the catalytic character is proposed on the basis of the results.
Samarium Diiodide Induced Reductive Coupling of Nitriles with Azides
Authors: Su Weike , Li Yongshu , Zhang Yongmin
Published: December 2009

A series of amidine derivatives were synthesized via the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide in good yields under mild and neutral conditions.
A Short and Facile Synthesis of Lactarochromal and the Corresponding Acid
Authors: Kamat Vijayendra P. , Asolkar Ratnakar N. , Kirtany Janardan K.
Published: December 2009

Lactarochromal (1), a metabolite of Lactarius deliciosus and the corresponding acid (2), also a natural product from Chrysothamnus viscidiflorus have been synthesized starting from p-cresol.
Regioselectivity of the Synthesis of 2-Pyrazolinylthiazoles by reacting 2-Hydrazinothiazoles with Unsymmetrical β-Diketones
Authors: Denisova Anna B. , Glukhareva Tatijana V. , Andronnikova Galina P. , Mokrushin Vladimir S. , Dehaen Wim , Luyten Ingrid , Sosnovskikh Vjacheslav Ya. , Van Meervelt Luc , Bakulev Vasiliy A.
Published: December 2009

Novel 2-pyrazolinylthiazoles 1 are prepared by reaction of 2-hydrazinothiazoles 2 with 1,3-dicarbonyl compounds of type 3. The conditions of the aromatization of 1 to 2-(3-aryl-5-trifluoromethylpyrazol-l-yl)thiazoles 4 have been investigated.
Synthesis and crystal structure of a novel camphor based thioacetal
Authors: Ravindran Swarnam S , Skiti Neliswa , McCleland Cedric , Barton Benita , Bacsa John
Published: December 2009

The synthesis of the very first example of a thioacetal containing two camphor skeleta is described. The acetal was prepared by treating 10-mercapto-iso-borneol with camphorquinone and its stereochemistry confirmed by NMR spectroscopy and X-ray crystallography.
Do NOE studies of water in DNA-histone units give significant information regarding the strength of solvation?†
Authors: Symons Martyn C.R.
Published: December 2009

A few water molecules attached to DNA have much longer residence times than expected, as established by NOE studies. It is now suggested that this arises because of the presence of long lived protein ‘caps’ spanning across the edges of the two DNA strands, thus trapping the water molecules underneath.
A facile synthesis of 10-arylmethylene anthracenones under microwave irradiation
Authors: Zhou Jian-Feng , Tu Shu-Jiang , Feng Jun-Cai
Published: December 2009

10-Arylmethylene anthracenones were synthesised by the condensation of aromatic aldehydes with anthracenone using sodium hydroxide as catalyst under microwave irradiation in good yields.
Synthesis and crystal structure of a new noncyclic polyether
Authors: Zhang Yanling , Liu Weisheng , Tan Minyu , Yu Kaibei
Published: December 2009

1,7-bis[2-(N-pyridinoylaniline)]-1,4,7-trioxaheptane has been prepared and its structure elucidated by X-ray analysis.
Synthesis and second-order optical nonlinearity of carbazolyl-substituted furan chromophores with high thermal stability and good transparency
Authors: Hua Jianli , Zhang Wei , Luo Jingdong , Qin Jingui , Shen Yaochun , Zhang Yu , Lu Zuhong
Published: December 2009

A series of new chromophores, in which N-hexylcarbazole acts as an electron donor and a furan ring is part of a conjugation bridge, are synthesised, and exhibit similar values of the first molecular hyperpolarisability, but better transparency compared with their analogues which contain diethylaminophenyl instead of N-hexylcarbazole as the donor, in addition to high thermal stability.
ZrCl4/wet SiO2 Promoted Oxidation of Alcohols by (NH4)2[Cr2O7] in Solution and Solvent Free Condition
Authors: Shirini Farhad , Zolfigol Mohammad Ali , Pourhabib Akram
Published: December 2009

Ammonium dichromate in the presence of ZrCl4 and wet SiO2 was used as an effective oxidising agent for the oxidation of benzylic and secondary aliphatic alcohols in solution and solvent free condition.
Preparation of Resin bound [Hydroxy(Tosyloxy)Iodo] Benzene and its use in 5-Benzoyldihydro-2 (3H)-Furanone synthesis
Authors: Huang Xian , Zhu Qing , Zhang Jizheng
Published: December 2009

A new type of polymer supported hypervalent iodine reagent, which is sufficiently reactive for the formation of 5-benzoyldihydro-2(3H)-furanone from 4-benzoylbutyric acid, has been prepared by a convenient method; the poly(4-iodostyrene), formed in the ractonization could be regenerated and recycled for reuse the same reaction.
Cholesterol-based Linear Trimesogens: Synthesis and Evaluation of Mesomorphic Behaviour
Authors: Yelamaggad C.V. , Nagamani S. Anitha , Rao D.S. Shankar , Prasad S. Krishna
Published: December 2009

Several trimesogens consisting of benzalazine as a central mesogenic segment, connected linearly on both the terminals with the cholesteryl ester moieties through either even–even or odd–odd alkylene spacers, have been synthesised and investigated for their liquid crystalline properties
Synthesis and Mesogenic Properties of Enantiopure Trioxadecalin Derivatives Bearing an n-Alkylphenyl Substituent
Authors: Bertini Bruno , Sinou Denis , Vill Volkmar
Published: December 2009

A number of chiral trioxabicyclo[4.4.0]decanes and boratrioxabicyclo[4.4.0]decanes have been prepared. The mesogenic properties of these compounds have been studied. They show short cholesteric pitch, blue phases and TGBA phases depending on the chain length of the n-alkyl substituent, with quite large differences between the trioxa- and the boratrioxaderivatives.
Bromination of 2,3-Dibromobenzobarrelene: A New and efficient Synthesis of 2,3,5-tribromobenzobarrelene
Authors: Dastan Arif
Published: December 2009

Bromination of 2,3-dibromobenzobarrelene at 77 °C was studied and 2,3,5-tribromobenzobarrelene was obtained in high yield. All compounds were characterised properly, especially by NMR spectra.
Studies on Isocyanides and Related Compounds. N,N'-disubstituted 2-cyanoacetoxy-2-cyanomethylmalondiamides from an unusual reaction between isocyanides and cyanoacetic acid
Authors: Marcaccini Stefano , Pepino Roberto , Paoli Paola , Rossi Patrizia , Torroba Tomás
Published: December 2009

The reaction between cyanoacetic acid 1 and isocyanides 2 afforded the unexpected N,N'-disubstituted 2-cyanoacetoxy-2-cyanomethylmalondiamides 3 which were easily cleaved in very mild conditions to the corresponding 2-hydroxy derivatives 4. The structure of compound 4a was confirmed by X-ray analysis. A hypothesis for the mechanism of formation of compounds 3 is presented.
An Uncommon Calix[4]Azacrown-4 Dimer Assembled by Hydrogen-Bonded Interaction
Authors: Liu Yu , Zhao Bang-Tun , Huang Gang , Zhang Heng-Yi , Wang Hao
Published: December 2009

A novel calix[4]azacrown-4 (2) was prepared, and its single crystal X-ray crystallographic analysis revealed that the carbonyl groups O atoms in 2 interact with amide H in another molecule of 2 by hydrogen bonds in the crystal, thus giving rise to a dimer possessing three “crown ether” rings.
A Convenient Synthesis of α-Ureidomethylphosphonates with Heterocycle Moiety
Authors: Li Zai-Guo , Huang Run-Qiu
Published: December 2009

Some novel heterocycle-substituted α-ureidoalkylphosphonates 3 have been synthesised through the reaction of α-isocyanatoalkylphosphonates with heterocyclic amines.
Kinetics and Mechanism of the Intramolecular Substitution of Acetate in 2′-Hydroxyphenacyl Acetate: 2′-Hydroxyphenacyl as a Potential Protective Group for Carboxylic Acids
Authors: Ogle Colin R. , Main Lyndsay
Published: December 2009

2-Acetoxy-2′-hydroxyacetophenone (1c) undergoes cyclisation in water via its phenolate ion to release acetate and coumaran-3-one (2) at rates defined by the equation kobs = k1/[1+(10-pH)/ Ka] where k1, the first order rate coefficient for the cyclisation of the phenolate ion, is 8.6 × 10−4 s−1 and Ka, the ionisation constant for 2′-OH is 2.0 × 10−9 (p Ka 8.70) at 30°C.
An Easy Route to Functionalised Tetrahydropyridazines
Authors: Yavari Issa , Adib Mehdi
Published: December 2009

A one-pot synthesis of dialkyl 5-ethoxy-6-oxo-1,2-diphenyl-1,2,5,6-tetrahydro-pyridazine-3,4-dicarboxylates by reaction of ethyl 2-(1,2-diphenylhydrazino)-2-oxoacetate, dialkyl acetylenedicarboxylate, and triphenylphosphine in good yields is reported.
Synthesis of Maritimin, a Chromone from Pancratium maritimum
Authors: Asolkar Ratnakar N. , Kamat Vijayendra P. , Kirtany Janardan K.
Published: December 2009

The synthesis of maritimin (1), a chromone from Pancratium maritimum L., is described
Gallium Mediated Barbier Reactions of 1,2-diones: A Facile Synthesis of α-hydroxy ketones
Authors: Nair Vijay , Ros Sindu , Jayan C. N.
Published: December 2009

Gallium mediated allylation and cinnamylation reactions of 1,2-diones in presence of LiBr and KI afforded α-hydroxycarbonyl compounds in moderate to good yields.
Kinetic Studies on the Cleavage of N-phthaloylglycine in the Buffers of Hydrazine and Morpholine
Authors: Khan M. Niyaz , Ismail Emran
Published: December 2009

Specific base-catalysed and unatalysed nucleophilic reactions of hydrazine with N-phthaloyl-glycine (NPG) have been observed in hydrazine buffers of pH 7.39–8.45. Cleavage of NPG in morpholine buffers of pH 8.25-9.16 shows only uncatalysed reaction between morpholine and NPG.
Dehydration of Alcohols Catalysed by Heteropolyacids Supported on Silica
Authors: Alesso Elba , Torviso Rosario , Finkielsztein Liliana , Lantaño Beatriz , Moltrasio Graciela , Aguirre José , Vázquez Patricia , Pizzio Luis , Cáceres Carmen , Blanco Mirta , Thomas Horacio
Published: December 2009

Keggin type heteropolyacids supported on silica efficiently dehydrated secondary and tertiary alcohols under mild conditions and in good yields to afford the correspondent alkenes.
Solvent-Free Axial Ligand Substitution in Octaphenoxyphthalocyaninato Silicon Complexes using Microwave Irradiation
Authors: Maree M. David , Nyokong Tebello
Published: December 2009

Several axially substituted octaphenoxy silicon phthalocyanines were prepared by condensation of the complexes used as axial ligands with octaphenoxyphthalocyaninato (dichloro) silicon under microwave irradiation.
Solvent-free Oxidation of Benzoins using Fe(NO3)3·9H2O as the Oxidant
Authors: Zhao Yue-Wei , Wang Yu-Lu
Published: December 2009

Benzoins are oxidised to benzils using Fe(NO3)3·9H2O as the oxidant under solvent-free condition by heating in an oven or microwave irradiation.
Effect of Chirality on the Diastereoselectivity of Intramolecular Ene Reaction: A Theoretical Study
Authors: Das Gourab Kanti
Published: December 2009

The effect of a preloaded chiral centre on the energies of the transition states in an intramolecular ene reaction has been studied by the AM1 semiempirical method. The stereoselectivity has also been predicted on the basis of the energies of transition states.
Spin Trapping Chemistry of the Diphenylphosphinyl Radical
Authors: Sueishi Yoshimi , Nishihara Yuko
Published: December 2009

The diphenylphosphinyl radical (·PPh2), produced from hydrogen atom abstraction of diphenylphosphine by 2,2-diphenyl-1-picryl-hydrazyl, was trapped by several kinds of spin trap and the relative reactivities of the ·PPh2 radical toward the five kinds of spin trap were determined by competitive reactions using DMPO as a reference.
Change in Fluorescence Spectra Depending on the Arrangement of the Chromophores in Multistep Fluorescence Resonance Energy Transfer
Authors: Kawahara Shun-ichi , Uchimaru Tadafumi
Published: December 2009

Multistep fluorescence resonance energy transfer in a system containing three chromophores is dependent upon the relative arrangement of the chromophore triad.
Liquid–liquid Extraction Equilibrium in the CuSO4–H2SO4–MOC 80TD–Iberfluid system
Authors: Alguacil Francisco José , Alonso Manuel , Cobo Antonio
Published: December 2009

A predictive model, which consists of a set of non-linear mass action and mass balance equations solved by using a tailor-made equation-solving program, is used as a basis to predict experimentally measured distribution coefficients for the CuSO4–H2SO4–MOC 80TD-Iberfluid liquid–liquid extraction system at 20°C and aqueous copper concentrations in the range 0.1-1.0 g l−1. The model is also used to obtain the copper loading isotherm at various initial aqueous pH values.
Reactions of Isomeric Dinitronaphthalic-1,8-Anhydrides with Alkylamines
Authors: Alexiou M.S. , Tyman J.H.P.
Published: December 2009

In the reaction products of 4,5-dinitronaphthalic-1,8-anhydride and of the 3,6-dinitro analogue with 1-butylamine only nitro groups in the former compound undergo reaction. 2,5-Dinitronaphthalic anhydride reacted partially. 4,5-Dibutylaminonaphthalic-N-butyl-1,8-imide was moderately fluorescent by comparison with 4-butylamino-N-butyl-1,8-imide, (FBYR). The ease of nucleophilic replacement of the nitro group in mononitro substituted rings increases with ring size and appears to be related to the stability of a Meisenheimer intermediate.
Micellar Effect: Evidence in Favour of different Mechanistic Paths of Chromium(VI) Oxidation of Formic Acid and Oxalic Acid in Aqueous Acid Media
Authors: Das Asim K. , Roy Aparna , and Dalia Kar , Saha Bidyut
Published: December 2009

The cationic surfactant, cetylpyridinium chloride (CPC) inhibits the CrVI oxidation of formic acid in a monotonic fashion in aqueous H2SO4 media. On the other hand, under comparable conditions, CPC catalyses the CrVI oxidation of oxalic acid and then it inhibits the reaction after attaining a maximum value in the rate vs [CPC]T profile. The observed micellar effect has been explained in the light of the proposed reaction mechanism and it provides an indirect evidence in favour of 3 e-transfer step for CrVI oxidation of oxalic acid.
Synthesis of N-(D-aldopyranosyl)-N′-(2,4,6-trichlorophenyl)-hydrazines and their conversion to 1,2-diaza-1,3-butadiene derivatives
Authors: Awad Laila F.
Published: December 2009

Facile conversion of N-(D-aldopyranosyl)-N′-(2,4,6-trichlorophenyl)-hydrazines to 1,2-diaza-1,3-butadiene derivatives under the conditions is described of acetic anhydride only.
Synthesis of Quinolines: Reductive Coupling Reactions of 2-nitro-1,3-diphenyl-2-propen-1-one induced by low-valent titanium
Authors: Ma Yongmin , Zhang Yongmin
Published: December 2009

The intramolecular reductive cyclisations of 2-nitro-1,3-diphenyl-2-propen-1-ones (1) induced by the Sm/TiCl4 system were studied; 2-arylquinolines (2) are obtained in moderate yields under room temperature conditions.
Regiospecific and Stereoselective Ene Reaction of the A-Ring Methylcyclohexene Moiety of Polycyclic Terpenoid Systems with Dimethyl Acetylenedicarboxylate
Authors: Abad Antonio , Agulló Consuelo , Cuñat Ana C. , Navarro Ismael , de Arellano Carmen Ramírez
Published: December 2009

Polycyclic terpenoid compounds with a methylcyclohexene moiety at the A-ring, such as 1 and 7, give a regio- and stereoselective ene reaction when heated at low temperatures with dimethyl acetylenedicarboxylate. The structure and stereochemistry of the compound formed in the case of 1, e.g. 5, is determined by X-ray analysis.
A Novel One-Pot Synthesis of Cyclopentanol Derivatives from Aldehydes and α-Haloketones by Samarium (III) Iodide and Samarium (II) Iodide Mediated Cascade Reactions
Authors: Fan Xuesen , Zhang Yongmin
Published: December 2009

Aldehydes can react with α-haloketones promoted by Sml3, to give α,β-unsaturated ketones, then, by adding powdered samarium to the reaction mixture, these undergo reductive cyclodimerisation to afford cyclopentanol derivatives under mild conditions
Spectrophotometric determination of Cationic Micellar Binding Constant of Ionised Phenyl Salicylate in the presence of Inert Salts
Authors: Khan M. Niyaz , Ismail Emran
Published: December 2009

A spectrophotometric technique has been used to determine the cetyltrimethylammonium bromide (CTABr) micellar binding constant ( KS) of ionised phenyl salicylate (PS-) in the presence of a constant amount of inert salt (MX = NaBr or C6H5COONa). The values of KS at different [MX] follow an empirical relationship: KS = KS0/(1 + KX/S[MX]) where the magnitude of the empirical parameter KX/S is the measure of the ability of X- to expel S- (= PS-) from the CTABr micellar pseudophase to the aqueous pseudophase. The value of KX/S is nearly 13-fold larger for C6H5COO-than for Br-.
Hypervalent Iodine in Synthesis 80: One Pot Preparation of Se-(β-oxoalkyl) O,O-dialkyl selenophospates by reaction of ketones, [hydroxy (tosyloxy) iodo]benzene, and potassium O,O-dialkyl selenophosphates
Authors: Xie Yuan-Yuan , Chen Zhen-Chu
Published: December 2009

One pot reactions of ketones, [hydroxy(tosyloxy)iodo]benzene and potassium O,O-dialkyl selenophosphates lead to the formation of the corresponding Se-(β-oxoalkyl) O,O-dialkyl selenophosphates under mild conditions and in good yield.
Convenient One-Pot Synthesis of α-Selenonitriles, α-Selenoesters and Asymmetrical Selenides by a Sm/ZnCl2 system in DMF-H2O
Authors: Guo Hongyun , Zheng Yunfa , Zhang Yongmin
Published: December 2009

α-Selenonitriles, α-selenoesters, and asymmetrical selenides can be readily obtained from the one-pot reaction of diselenides and active organic halides by a Sm/ZnCl2 system in DMF-H2O.
Synthesis and X-ray crystal structure of 5β-cholan-24-yl chloride
Authors: Cox Philip J. , Nahar Lutfun , Turner Alan B.
Published: December 2009

5β-cholan-24-yl chloride (5) was prepared from lithocholic acid (1) in four steps, and following spectral investigations its crystal and molecular structure was determined by X-ray crystallography.
Versatile Starting Materials for Novel 1,ω-bis(pyridin-4-ylphenoxy)alkanes, and their Corresponding bis(thieno[2,3-b]pyridin-4-ylphenoxy) derivatives
Authors: Abbas Ashraf A. , Elneairy Mohamed A.A. , Mabkhot Yehia N.
Published: December 2009

A synthesis is described, starting from p-hydroxybenzaldehyde, of some new bis(activated styrene) derivatives, and their conversion into novel bis(pyridin-4-yl) ethers and bis(thieno[2,3- b]pyridine) derivatives.
One-pot Nitration of Phenols under Mild and Heterogeneous Conditions
Authors: Zolfigol Mohammad Ali , Bagherzadeh Mojtaba , Madrakian Elahe , Ghaemi Ezat , Taqian-Nasab Abolfazl
Published: December 2009

Nitrophenols can be obtained via nitrosation–oxidation of phenols with Oxone®, NaNO2 and wet SiO2 at room temperature in moderate to high yields. In situ generation of HNO2 and the radical cation mechanism via the nitrous acid catalysed (NAC) pathway or hydrogen abstraction involving NO2 appear to be applicable to phenol nitration using these reagents.
Transformation of 4-Acetoxy-3-Vinylazetidin-2-Ones to 3-(1-Hydroxyethyl)Azetidin-2-Ones and 3-Ethylideneazetidin-2-Ones: Intermediates for Carbapenem Antibiotics
Authors: Neary Anthony D. , Burke Catherine M. , O'Leary Aisling C. , Meegan Mary J.
Published: December 2009

4-Acetoxy-3-vinylazetidin-2-one and 4-formyl-3-vinylazetidin-2-one are transformed to the carbapenem intermediates 4-acetoxy-3-(1-hydroxyethyl)azetidin-2-one and 4-acetoxy-3-ethylideneazetidin-2-one respectively, and the synthesis of a 6-vinylcarbapenem is reported.
The Selective Synthesis of 1-methyl-1H-histamines
Authors: Collman James P. , Zhong Min , Costanzo Simona
Published: December 2009

The selective synthesis of 1-methyl-1H-4-histamine (1) and 1-methyl-1H-5-histamine (2) via 5-oxo-5,6,7,8-tetrahydroimidazo[1,5-c]pyrimidine (3) from commercially available histamine hydrochloride salt is described.
Zn/ZrCl4 System Induced Reductive Cleavage of the Se–Se Bond in Diaryl Diselenides: A Novel Method for the Synthesis of β-selenoesters and β-selenonitriles
Authors: Zhang Songlin , Tian Fengshou
Published: December 2009

The Se–Se bond in diselenides was reduced by Zn/ZrCl4 to produce selenolate anions, which react with α,β -unsaturated esters or α,β -unsaturated nitriles to afford β-selenoesters and β-selenonitriles, respectively.
Three New Spirocyclic Palladium(0) Complexes Containing Diphosphines Derived from N,N‘-substituted ethylenediamines
Authors: Balakrishna Maravanji S.
Published: December 2009

The reactions of Ph2PN(R)CH2CH2N(R)PPh2 (LL) (1 R=CH2Ph, 2 R=Ph, 3 R=CH3) with [Pd2(dba)3] (dba=dibenzylidene acetone) in CH2Cl2 yield mononuclear complexes of the type [Pd(h 2-LL)2] in good yield.
Kinetics and Mechanism of the Oxidation of Substituted Benzyl Alcohols by oxo(salen)manganese(V) complexes
Authors: Kumbhat Vinita , Sharma Pradeep K. , Banerji Kalyan K.
Published: December 2009

The oxidation of benzyl alcohol by oxo(salen)manganese (V) complexes proceeds via either a hydride-ion or a hydrogen-atom transfer from the alcohol to the manganese (V) complexes.
Urotropine: An Efficient Catalyst Precursor for the Microwave-Assisted Knoevenagel Reaction
Authors: Peng Yanqing , Song Gonghua , Qian Xuhong
Published: December 2009

By using urotropine as a catalyst precursor, a rapid microwave-assisted Knoevenagel reaction of various active methylene compounds with aldehydes gave the corresponding olefinic products with satisfactory yields.
Hydrogen-Bonded (H2O·X)2 [X=Cl–, Br–] Clusters in 1-Phenacyl-4-(Dimethylamino)Pyridinium Halide Monohydrates
Authors: Prabakaran P. , Muthiah P. Thomas , Nallu M. , Sathiskumar V. , Bocelli G. , Righi L.
Published: December 2009

The synthesis, and X-ray crystal and molecular structures, of 1-phenacyl-4-(dimethylamino)pyridinium chloride and bromide monohydrates are described.
A Simple Route to the Preparation of Benzimidazoles and Benzoxazoles
Authors: Rostamizadeh Shahnaz , Derafshian Esmaiel
Published: December 2009

The synthesis of benzimidazoles and benzoxazoles by the condensation reaction of o-phenylenediamines and o-aminophenols with S-methylisothioamide hydroiodides on silica gel under microwave irradiation, and also in solvent under reflux, is reported.
A Novel Ceramide from the Indian Marine Sponge Fasciospongia Cavernosa
Authors: Ramesh P. , Ravikanth V. , Reddy V. L. Niranjan , Goud T. Venkateshwar , Venkateswarlu Y.
Published: December 2009

A new ceramide 1, has been isolated along with a known compound 3,6-diacetoxy-cholest-7-en-3β,5α,6β-triol (2) from a marine sponge Fasciospongia cavernosa collected off the Mandapam coast in the Gulf of Manner, India. The structures of 1 and 2 were determined by spectroscopic analysis.
Hypervalent Iodine in Synthesis 69: An Efficient Synthesis of 2-Arylbenzoxazoles via the Palladium-Catalysed Carbonylation and Condensation of Diaryliodonium Salts and O-Aminophenols
Authors: Zhou Tao , Chen Zhen-Chu
Published: December 2009

An efficient synthetic method is reported in which 2-arylbenzoxazoles have been prepared in good to excellent yields under mild reaction conditions by the palladium-catalysed carbonylation of diaryliodonium salts with o-aminophenols followed by dehydrative cyclisation.
An Efficient and Convenient Method for Preparation of 2,2-Disubstituted and 2-Monosubstituted 1,3-Benzodioxoles from Ketones and Aldehydes with Catechol Catalysed by ZrO2/SO42-
Authors: Jin Tong-Shou , Zhang Su-Ling , Wang Xiao-Feng , Guo Jun-Jie , Li Tong-Shuang
Published: December 2009

The title compounds have been synthesised by reaction of catechol with ketones and aldehydes catalysed by ZrO2/SO42– solid superacid in high yields. Ketones gave better yields than aldehydes.
Synthesis of Acyclic 2-O-Alkyl Analogues of 3-Dideoxythymidine
Authors: Abdel-Rahman Adel A.-H. , Abdel-Aal Mohamed T.
Published: December 2009

Nucleoside coupling of 2 with sodium salt of 1a–f gave 3a–f which were oxidised and hydrolysed to afford 4a–f.
Substituted N-Salicylidene β-Aminoalcohols: Preparation and use as Chiral Ligands in Enantioselective Sulfoxidation and Conjugate Addition
Authors: Skarżewski Jacek , Ostrycharz Elżbieta , Siedlecka Renata , Zielińska-Błajet Mariola , Pisarski Bartłomiej
Published: December 2009

A high yielding synthesis of optically active 3,5-disubstituted salicylidene β-amino alcohols (6) is described. The catalytic use of D or L- N-(3-phenyl-5-nitrosalicylidene)valinol in enantioselective sulfoxidation (H2O2 / VO(acac)2) gives up to 95% e.e. Asymmetric conjugate addition of thiophenol to 2-cyclohexen-1-one catalysed by Ti(OPr- i)4 and 6 leads to maximum 31% e.e. in the product.
Freezing Conformation of Polychloronitrophenyl N-Substituted Morpholines Studied by DNMR and X-Ray Crystal Structure
Authors: Zou Xinzhuo , Kuma Hiro , Ibata Toshikazu , Suga Hiroyuki
Published: December 2009

The acceleration of SNAr reaction of aromatic halides has been studied with various amines under high pressure. Compounds having high steric hindrance as 2-morpholino-substituted polychloro-1-nitrobenzenes were obtained. These showed different behaviours of methylene protons of morphlino ring at room temperature apparently related to the higher steric hindrance. So these compounds were investigated using dynamic 1H NMR and single crystal X-ray crystallography.
Aromatic Nucleophilic Substitution Reactions of Some 3-Nitro-2-P-Nitro-Phenoxy-5-X-Thiophenes with Substituted Anilines in Methanol
Authors: Consiglio Giovanni , Frenna Vincenzo , Guernelli Susanna , Macaluso Gabriella , Spinelli Domenico
Published: December 2009

A series of optimised ‘thiophene’ sigma constant values has been calculated by using the reactions of some 3-nitro-2- p-nitrophenoxy-5-X-thiophenes with some substituted anilines. The susceptibility constants obtained are discussed in the framework of the reactivity–selectivity principle.
[PtCl(C6H4CH2O)(PhCH2O)PN(Ph)P(OCH2Ph)2], the First Example of an Ortho-Metallated Platinum(II) Complex of a P-N-P Ligand
Authors: Balakrishna Maravanji S.
Published: December 2009

The reaction of PhN{P(OCH2Ph)2}2 with Pt(COD)Cl2 at room temperature gives the ortho-metallated complex, 2 via intra C–H activation and the elimination of HCl, as well as the expected cis chelated complex 1.
Synthesis of heterocyclic oxyalkynylamines
Authors: Matijoška A. , Kupetis G. K. , Eicher-Lorka O. , Rastenyté L.
Published: December 2009

The synthesis and characterisation of butynoxy- and butyndioxyalkylated piperidine and morpholine derivatives having one or two phenyl groups are reported.
Stereoselective synthesis of (+)-Δ5-dehydrosugiyl methyl ether
Authors: Li Anpai , Peng Xiaoshui , Bie Pingyan , Wu Tongxing , Pan Xinfu , Yang Teng-Kuei
Published: December 2009

A stereoselective synthetic route to (+)-D 5-dehydrosugiyl methyl ether 1 was developed from (S)-(-)-α-cyclocitral 6 in which DDQ as a better oxidant for enone was used.
Thermal Analysis of Pyridinium Tetrachloronickelate(II); Tetrahedral ⇌ Octahedral Structural Transformation
Authors: Bhattacharya Rahul , Ghosh Ashutosh
Published: December 2009

Pyridinium tetrachloronickelate(II), which is green and tetrahedral in the anhydrous state but yellow and octahedral when aquated, undergoes dehydrohalogenation upon heating in the solid state to yield [NiCl2Py2].
Synthesis and biological activity of novel N-sulfenylated derivatives of diacylhydrazines†
Authors: Wang Qing Min , Huang Run Qiu , Bi Fu Chun , Li Zai Guo
Published: December 2009

A series of new N-sulfenylated derivatives of diacylhydrazines were synthesised and evaluated for moulting hormone mimicking activity, and the results of bioassay showed that the title compounds exhibit excellent larvicidal activities, and toxicity assays indicated that the title compounds can induce a premature, abnormal and lethal larval moult.
Prediction of density of liquid mixtures using Flory's statistical theory†
Authors: Pandey J.D. , Sanguri Vinay
Published: December 2009

Density of various binary and multicomponent liquid mixtures have been calculated with the help of Flory's statistical theory at different temperatures. Computed values of densities have been compared with the experimental values. Excellent agreement has been found.
Pyrrole studies, Part 48.113C NMR characterisation of imines and related compounds derived from pyrrole-2-carboxaldehydes and pyrrole-2,5-dicarboxaldehydes
Authors: Jones R. Alan , Quintanilla-López Gloria , Öztürk Orhan , Taheri Sayed Ali Nagdi , Berber Karatepe Gülan , Jones Richard O.
Published: December 2009

In contrast with the imines formed from monoaminoalkanes and α,ω -diaminoalkanes with pyrrole-3,4-dicarboxaldehydes, which exist in a tautomeric 3H-pyrrole form, pyrrole-2-carboxaldehydes and -2,5-dicarboxaldehydes react with amines to produce 1H-pyrrolyl-methylenimines. Pyrrole-2,5-dicarboxaldehydes with 1,2-diamino-ethane and with 1,3-diaminopropane yield symmetrical macrocyclic systems, contrary to earlier reports.
Application of Aminocarbonylation in the Synthesis of a Lavendamycin Synthon
Authors: Holzapfel Cedric W. , Marais Wilhelmina
Published: December 2009

An efficient route to a key intermediate in the synthesis of lavendamycin from a suitably substituted 2-chloroquino-line derivative via aminocarbonylation with tryptophan methyl ester as nucleophile, is reported.
The γ-cis Effect in the Mercury-199 NMR Spectroscopy of Substituted Vinylmercury Halides
Authors: Vieco Fernando S. H. , Hiramatsu Nelson M. , Tedeschi Eduardo , Rezende Daisy de B. , de Arruda Campos Ivan P.
Published: December 2009

The γ- cis effect is identified for the first time in the 199Hg NMR data presented here, being proposed as a new criterion for the distinction between E and Z isomers of substituted vinylmercury compounds.
Photo-oxygenation of Phytol and the Structure Revision of Phytene-1,2-diol from Artemisia annua to Phytene-1-ol-2-Hydroperoxidek
Authors: Wong Ho-Fai , Brown Geoffrey D.
Published: December 2009

Photo-oxygenation of racemic phytol has yielded two secondary allylic hydroperoxides and an endoperoxide hemi-acetal, which are the expected products from the “ene-type” reaction of singlet oxygen with the tri-substituted double bond in phytol. Spectral properties for one of the diastereoisomers of phytene-1-ol-2-hydroperoxide obtained from synthesis are shown to be identical with those of a natural product previously reported from Artemisia annua, which, it is concluded, was wrongly assigned as phytene-1,2-diol.
Lithium Perchlorate and Lithium Bromide Catalysed Solvent Free One Pot Rapid Synthesis of 3-Carboxycoumarins under Microwave Irradiation
Authors: Bandgar B.P. , Uppalla L.S. , Sadavarte V.S.
Published: December 2009

Reaction of 2-hydroxy or 2-methoxy substituted benzaldehydes or acetophenones with Meldrum's acid in the presence of a catalytic amount of LiClO4 or LiBr without solvent under microwave irradiation afforded 3-carboxycoumarins in excellent yields.
Crystal Structure of (R*,S*)-3-(Hydroxy-Phenyl-Methyl)- 2-Methyl- and 2-(4-Methoxybenzyl)-2,3-Dihydroisoindol-1-Ones
Authors: Rys Veronique , Couture Axel , Deniau Eric , Grandclaudon Pierre , Nowogrocki Guy
Published: December 2009

Quenching of lithiated isoindolin-1-ones with benzaldehyde gives rise almost exclusively to the erythro (R*,S*) adducts.
An Efficient Synthesis of 2-(3-methylbutoxy)-1,3-benzodithiole
Authors: Sarhan Abd El-Wareth , Izumi Taeko
Published: December 2009

2-(3-Methylbutoxy)-1,3-benzodithiole has been synthesised in good yield by a modification of the method previously described by Nakayama.
Structure Elucidation of N-aryl-2-chloro-3-oxobutanamides with respect to intra- and intermolecular hydrogen bonding
Authors: Frohberg Petra , Drutkowski Guntram , Wagner Christoph , Lichtenberger Olaf
Published: December 2009

In general, N-aryl-2-chloro-3-oxobutanamides form in solid state an intermolecular hydrogen bond between the anilide hydrogen and the anilide carbonyl oxygen of a neighbouring molecule, which is disrupted in solution. An intramolecular association could not be detected.
Bridging effect in the Polymerisations of 1,3-Butadiene Catalysed by Me2SiCp2TiCl2/MAO catalyst. Polymerisation Activity and Stereospecificity
Authors: Miyazawa Akira , Suzuki Yasuzo
Published: December 2009

A combination of dimethylsilylene-bridged bis-cyclopentadienyltitanium dichloride and methylaluminoxane showed high catalytic performance toward the polymerisation of 1,3-butadine.
Synthesis and Application of 2,6-Dicarboxypyridinium Chlorochromate as a new Oxidising Reagent for Alcohols, Silyl Ethers, and THP ethers under Mild and Non-Aqueous Conditions
Authors: Tajbakhsh Mahmood , Hosseinzadeh Rahman , Niaki Mohammad Yazdani
Published: December 2009

2,6-Dicarboxypyridinium chlorochromate can be used as a rapid, mild and efficient reagent for oxidation of alcohols, silyl ethers and THP ethers to their carbonyl compounds.
Polystyrene-bound Phenylseleninic Acid: Catalytic Oxidation of Aldehydes to Carboxylic Acids with Hydrogen Peroxide
Authors: Qian Hao , Shao Li-Xiong , Huang Xian
Published: December 2009

Polystyrene-bound phenylseleninic acid was prepared conveniently and aldehydes were catalytically oxidised to carboxylic acids with hydrogen peroxide using this polymer as catalyst.
Synthesis of 4-(6H-dibenzo[b,e]thiepin-11-ylidene)cyclohexa-2,5-dienone and 4-(6H-dibenzo[b,e]oxepin-11-ylidene)cyclohexa-2,5-dienone
Authors: Jorgensen Michael R. , McCleland Cedric W. , Taljaard Benjamin , Taljaard Jana H.
Published: December 2009

The synthesis of two novel quinone methides (4a and 4b) containing tricyclic heterocyclic systems with 7-membered central rings has been achieved in good yields under relatively mild reaction conditions.
Synthetic Route to 1,3-disubstituted Naphthalene Derivatives
Authors: Demirtas Ibrahim , Erenler Ramazan , Cakmak Osman
Published: December 2009

The preparation of methoxy and cyanonaphthalene derivatives is described. The preparation of 1,3-dimethoxynaphthalene, 1-bromo-3-methoxynaphthalene, 1-methoxy-3-bromonaphthalene and 1,3-dicyanonaphthalene involves the reaction of 1,3-dibromonaphthalene with the corresponding nucleophile.
Flavonoid from Viburnum cotinifolium
Authors: Muhaisen Hasan M.H. , Ilyas M. , Mushfiq M. , Parveen Mehtab , Basudan Omer A.
Published: December 2009

From the leaves of Viburnum cotinifolium, a new biflavonoid named as I-5, II-5, I-7, II-7, I-4’, II-4′-hexahydroxy [6-O-8] biflavone along with seven known flavonoids have been isolated. Their structures were elucidated from their chemical and physical data (IR, UV, 1H NMR, 13C NMR and mass spectra).
Mechanism of Stereoselective Synthesis of Push-Pull (Z)-4-Oxothiazolidine Derivatives Containing an Exocyclic Double Bond. A MNDO-PM3 Study
Authors: Marković Rade , Vitnik Željko , Baranac Marija , Juranić Ivan
Published: December 2009

Calculations using the MNDO-PM3 method were performed to elucidate the mechanism of stereoselective base-catalyzed reaction affording exclusively ( Z)-2-alkylidene-4-oxothiazolidine push-pull derivatives from the corresponding α-mercapto esters and activated β-oxonitriles in ethanol as a solvent.
Chemoselective Additions of Thiophenol to Carvone and Perillaldehyde
Authors: Smitt Olof , Högberg Hans-Erik
Published: December 2009

Depending on the reaction conditions addition of thiophenol can be directed to either of the two C=C-double bonds of the monoterpenes carvone and perillaldehyde.
Oxidation of Thiols to the Corresponding Disulfides with Tetramethylammonium Chlorochromate under Non-Aqueous Conditions
Authors: Hajipour Abdol. R. , Ruoho Arnold E.
Published: December 2009

This paper describes the preparation of tetramethylammonium chlorochromate (TMACC) as an efficient and mild reagent for oxidation in refluxing acetonitrile of a variety of aromatic and aliphatic thiols, giving the corresponding disulfides; the experimental procedure is simple, and the products are easily isolated in excellent yields.
Preparation of Conjugated Enynes and Arylacetylenic Compounds from Arylalkynols using Alumina in Dry Media
Authors: Pourjavadi Ali , Marandi Gholam Bagheri
Published: December 2009

Arylalkynols were converted into both conjugated enynes and arylacetylenic compounds using p-TsCl/Al2O3 and KOH/Al2O3 respectively in classical heating or microwave irradiation methods in good yields.
Microwave assisted Convenient and Facile Regeneration of Carbonyl Compounds from Oximes, Semicarbazones and Phenylhydrazones using Silica Supported Ceric Ammonium Nitrate1
Authors: Srinivas K.V.N.S. , Das Biswanath
Published: December 2009

Microwave assisted efficient regeneration of carbonyl compounds from the corresponding oximes, semicarbazones and phenylhydrazones has been developed by using silica supported ceric ammonium nitrate.
Coupling reaction of Aryl Halides Promoted by NiCl2/PPh3/Sm0
Authors: Zheng Xingliang , Zhang Yongmin
Published: December 2009

An efficient synthesis of biaryls from various aryl halides has been developed and investigated. The coupling reagent is a catalytic mixture of anhydrous NiCl2 and PPh3 in the presence of metallic samarium. The reaction occurs rapidly under mild conditions, tolerates a variety of functional groups with high yields.
Geometrical Structures and Magnetic Properties of Trinaphtho[abc,ghi,mno][18]annulene and its congeners
Authors: Kataoka Masahiro
Published: December 2009

Pariser–Parr–Pople-type SCF MO and semiempirical magnetic-susceptibility calculations show that trinaphtho[ abc,ghi,mno]- and two kinds of triazuleno[ abc,ghi,mno][18]annulenes have large diamagnetic susceptibilities and aromatic-islands structures in which three naphthalenes or three azulenes are linked by three olefinic bridges, whereas tripentaleno[ abc,ghi,mno]- and triheptaleno[ abc,ghi,mno][18]annulenes have small diamagnetic susceptibilities and polyolefine structures where bond alternations are distributed all over their molecular planes.
Measurement of 4-Hydroxy-2,2,6,6-Tetramethyl-Piperidine-N-Oxyl by high Performance Liquid Chromatography–Electrospray Ionisation Mass Spectrometry
Authors: Podmore Ian D.
Published: December 2009

Reverse phase high performance liquid chromatography coupled to electrospray ionisation mass spectrometry and tandem mass spectrometry has allowed quantitative measurement of a stable nitroxide, 4-hydroxy-2,2,6,6-tetramethyl-piperidine-N-oxyl (4-hydroxy-tempo), the latter with high sensitivity.
The Role of Metal Salts in a Solid Phase β-Selective Epoxidation of Δ5-steroids with Potassium Permanganate
Authors: Salvador Jorge A.R. , Hanson James R.
Published: December 2009

Epoxidation of Δ5-steroids with a potassium permanganate and a range of metal salts in the solid phase gives the 5β, 6β-epoxides. The results have been rationalised in terms of the oxophilic metal ions favouring epoxide formation in the collapse of a manganate intermediate.
Novel Bisurea Host Compounds
Authors: Tanaka Koichi , Daikawa Naoki , Ohba Shigeru
Published: December 2009

New host molecules, 4,4′-bis(dimethylamino-urea)diphenylmethane (1) and its derivatives (2 and 3), are reported. These hosts are shown to give inclusion complex crystals with a wide variety of organic guest molecules with high selectivity. The crystal structure of 1:2 inclusion complex of 1 with THF has been determined from X-ray crystal structure analysis. The cyclic N–H...O intermolecular hydrogen bonds between host molecules were found to form columns for accommodation of the guest molecules.
Kinetics and Activation Thermodynamics of the Solvolysis of Tert-Pentyl and Tert-Hexyl Halides in Alcohols
Authors: Albuquerque Lídia C. , Moita Luísa C. , Gonçalves Raquel C. , Macedo Eugénia A.
Published: December 2009

The influences of solvent and substrate were interpreted through the values of rate constants and infinite dilution activity coefficients obtained for the solutes 2-chloro- and 2-bromo-2-methylbutane and 3-chloro-3-methylpentane in several monohydric alcohols at 298.15 K.
A Novel Synthesis of N-substituted 2-(benzotriazol-1-yl) Acetamides Promoted by Samarium Diiodide
Authors: Su Weike , Yang Bibo , Li Yongshu
Published: December 2009

1-(Chloromethyl)benzotriazole undergo reaction with isocyanates promoted by samarium diiodide to afford N-substituted 2-(benzotriazol-1-yl)acetamides in good yields under mild and neutral conditions.
Synthesis, Characterisation and Spectral Studies of some Molecular Adducts of Organotin(IV) Chlorides with Free Base Meso-Tetraarylporphyrins
Authors: Asadi Mozaffar , Zabardasti Abedien
Published: December 2009

Some molecular complexes of diethyltin(IV) dichloride and methyltin(IV) trichloride with para-substituted meso-tetraphenylporphyrins of the general formula [(Et2SnCl2)2H2T(4-X)PP] and [(MeSnCl3)2H2T(4-X)PP]; {X= OCH3, CH3, H, and Cl} have been synthesised and characterised by means of 1H NMR, UV-Vis, and elemental microanalysis methods.
Organic Reactions in Ionic Liquids: α-Tosyloxylation of Ketones
Authors: Xie Yuan Yuan , Chen Zhen Chu , Zheng Qin Guo
Published: December 2009

The room temperature ionic liquid, n-butylpyridinium tetrafluoroborate (BPyBF4) is used as a “green” recyclable alternative to classical molecular solvents for the α-tosyloxylation of ketones.
Kinetic Studies on the Oxidation of Some Para and Meta-Substituted Benzaldeydes by Nicotinium Dichromate
Authors: Sekar K.G.
Published: December 2009

For the oxidation of para- and meta-substituted benzaldehydes by nicotinium electron releasing substituents retard and the electron withdrawing substituents enhance the rate of the reaction; from the kinetic data obtained activation parameters have been computed and a plausible mechanism has been proposed.
A Novel Hemisynthesis of the 19-Demethyl Analogue of Calcimycin (or A23187)
Authors: Vila Stéphane , Canet Isabelle , Guyot Jacques , Jeminet Georges
Published: December 2009

The hemisynthesis of 19-demethylcalcimycin 8 was carried out in five steps from the naturally occurring calcium ionophore using retroaldol/aldol reactions on an open chain dithioketal intermediate. The key retroaldol cleavage was achieved by using the coupled reagents Ti(OtBu)4 / benzaldehyde.
Interactions between the Aldehyde and Anhydride Groups in the Diterpenoid Fujenal
Authors: Hanson James R. , Hitchcock Peter B. , Pibiri Ivana , Uyanik Cavit
Published: December 2009

Methanolysis of the diterpenoid aldehyde:anhydride, fujenal, catalysed by tetracyanoethylene afforded C-6:C-7 methoxylactones whilst the addition of methyl magnesium bromide to fujenal afforded a 6,7-lactone but with an cis A/B ring junction; the structures of these products were established by X-ray crystallography.
Water Promoted Iodotrimethyl Silane Reactions: Reductive Cleavage of Isoxazolidines and 2,1-Benzisoxazoles to γ-Amino Alcohols and O-Aminobenzophenones
Authors: Boruah Monalisa , Konwar Dilip
Published: December 2009

Water promoted iodotrimethyl silane [ITMS] reductively cleaved isoxazolidines and 2,1-benzisoxazoles to γ-amino alcohols and o-aminobenzophenones respectively at shorter times and in higher yields at room temperature.
Heck Arylation of Conjugated Alkenes Catalysed by a Silica-Supported Poly-γ-Methylselenopropylsiloxane Palladium(0) Complex, the First Polymeric Organoselenium Palladium Complex
Authors: Cai Ming-Zhong , Zhou Jun , Zhao Hong , Song Cai-Sheng
Published: December 2009

A silica-supported poly-γ-methylselenopropylsiloxane palladium(0) complex was prepared from poly-γ-chloro-propylsiloxane by treatment with sodium methyl-selenolate, followed by reaction with palladium chloride and then reduction with hydrazine hydrate. The first polymeric organoselenium palladium complex is a highly active and stereoselective catalyst for the arylation of conjugated alkenes.
Kinetic and Mechanistic Study of Oxidative Degradation of Paracetamol by Diperiodatonickelate (IV) in Aqueous Alkaline Medium
Authors: Kulkarni R.M. , Bilehal D.C. , Nandibewoor S.T.
Published: December 2009

A mechanism involving the monoperiodatonickelate (IV) (MPN) as the reactive species of the oxidant has been proposed. The reaction constants involved in the different steps of the mechanism are calculated. The activation parameters with respect to the slow step of the mechanism are computed and discussed.
Stereoselective Conversion of Dialkylselenaethenylboranes into Dialkylselenaalkenes by Cross-Coupling of Carbon–Carbon Systems
Authors: Yang De-Yu , Wang Yun-De , Yan Jian-Bo , Huang Xian
Published: December 2009

Dialkylselenaethenylboranes reacted with iodonium salts in the presence of a catalytic amount of Pd(PPh3)4 and NEt3 at room temperature to provide dialkylselenaalkenes with retention of configuration.