bluuebunny/crossref_metadata_2025_split huggingface dataset:
ELECTRODIALYSIS WITH LIQUID MEMBRANE CONTAINING DIBENZO-18-CROWN-6 AS A CARRIER
Authors: Igawa Manabu , Saitou Kiyohiko , Kasai Hiroki , Tanaka Masao , Yamabe Takeo 
Published: July 2006

Abstract
A liquid membrane containing dibenzo-18-crown-6 was applied to electrodialysis and was found to be effective for selective transport of potassium ions. The selective cation transport was caused by the carrier relay mechanism and the current density increased with increasing crown ether concentration and increasing applied voltage.
A NOVEL TRANSFORMATION OF CHLOROPHYLL a AGGREGATES IN POLY(VINYL ACETATE) FILMS By IMMERSING INTO WATER. OBSERVATION OF POSITIVE OR NEGATIVE PHOTO-INDUCED POTENTIAL SHIFTS FOR THE RESULTED FILMS COATED ON PLATINUM ELECTRODE
Authors: Uehara Kaku , Shibata Keisuke , Tanaka Makoto 
Published: July 2006

Abstract
Upon immersing into water, the chlorophyll a(chl a)/poly vinyl acetate) film cast from dioxane or dimethyl sulfoxide (DMSO) showed a transformation from chl a-dioxane aggregate (692 nm) to monomeric(668 nm) or from chl a-DMSO aggregate (695 nm) to (chl a·2H2O)n(746 nm), respectively. The platinum electrodes coated By the two types of transformed films showed the opposite direction of photo-induced potential shift.
CONVENIENT SYNTHESIS OF 1-AZA-3-THIABICYCLO[3.1.0]HEXANES FROM l-CYSTEINE
Authors: Takata Toshikazu , Kuo Mingjung , Tamura Yoshiharu , Kabe Yoshio , Ando Wataru 
Published: July 2006

Abstract
Synthesis of optically active 2-substituted and unsubstituted 1-aza-3-thiabicyclo[3,1.0]hexanes are accomplished By intramolecular cyclization of 4-hydroxymethylthiazolidines which are prepared By the reaction of l-cysteine methyl ester with appropriate aldehydes followed By reduction of ester function.
ESR STUDIES ON A NEW 3dz2 TYPE COPPER(II)-CROWN ETHER COMPLEX WITH AXIALLY COORDINATED WATER MOLECULES
Authors: Li Yong , Tomoda Hideyuki , Tajima Kunihiko , Ishizu Kazuhiko , Azuma Nagao 
Published: July 2006

Abstract
In the presence of the optimum amount of water, the ESR spectra of copper(II) complexes of 5-oxygen donors observed in BF3-etherate solution revealed a typical g-anisotropy ascribed to the 3dz2 type copper(II) complex. Based on the detection of superhyperfine splittings due to 17O isotope, the axial ligation of water molecule was confirmed, and the coordination geometry of the complex was assumed.
SKELETAL REARRANGEMENTS OF TRICYCLO[6.3.0.01,6]UNDECAN-5-OLS TO FUNCTIONALIZED TRICYCLO[6.3.0.01,5]- and [5.3.1.01,5]UNDECANES
Authors: Kakiuchi Kiyomi , Kumanoya Shuichi , Ue Masaki , Tobe Yoshito , Odaira Yoshinobu 
Published: July 2006

Abstract
The functionalized tricyclo[6.3.0.01,5]- and [5.3.1.01,5]-undecanes are newly synthesized from endo- and exo-tricyclo-[6.3.0.01,6]undecan-5-ols by skeletal rearrangements using the solvolyses of their tosylates. Furthermore, a novel biologically active compound is derived readily from the rearrangement products.
STELEOSELECTIVE REDUCTION OF RACEMIC N-HYDROXYAMINO ACIDS BY OPTICALLY ACTIVE THIOLS-IRON(II)
Authors: Nambu Yoko , Endo Takeshi 
Published: July 2006

Abstract
Kinetic resolution of racemic N-hydroxyamino acids by the reduction with optically active thiols and a catalytic amount of ferrous ion gave optically active amino acids presumably through enantiodifferentiating coordination of substrates to thiol-Fe(II) complexes.
AN EFFECTIVE ACTIVATION OF ALLYL METHYL ETHERS BY A CATALYTIC AMOUNT OF TRITYL PERCHLORATE IN THE ALLYLATION OF SILYL ENOL ETHERS
Authors: Mukaiyama Teruaki , Nagaoka Hitoshi , Ohshima Masahiro , Murakami Masahiro 
Published: July 2006

Abstract
In the presence of a catalytic amount of trityl perchlorate, secondary and tertiary allyl methyl ethers smoothly react with silyl enol ethers to afford the corresponding γ,δ-unsaturated carbonyl compounds in good yields. By the combination of this reaction with the trityl perchlorate catalyzed allylation of acetals γ,δ-unsaturated ketones are synthesized from α,β-unsaturated acetals by a one-pot procedure.
A CONVENIENT METHOD OF STEREOCHEMICAL ANALYSIS OF PRENYLTRANSFERASE REACTION AND ITS APPLICATION
Authors: Ito Michio , Koyama Tanetoshi , Ogura Kyozo 
Published: July 2006

Abstract
convenient method based on the utilization of isopentenyl pyrophosphate (IPP) isomerase was developed to facilitate the discrimination of the prochirality of the hydrogen eliminated from IPP during prenyltransferase reaction. E,E-Farnesyl pyrophosphate synthetase of pumpkin was shown to catalyze the addition of allylic moiety to the si face of the double bond of IPP with loss of the 2-pro-R hydrogen.
OBSERVATION OF A SILANIMINE IN AN INERT MATRIX AND IN SOLUTION AT LOW TEMPERATURE
Authors: Zigler Steven S , West Robert , Michl Josef 
Published: July 2006

Abstract
Irradiation of Mes3SiN3 in 3-methylpentane at 77 K or −140 °C yields the silanimine, Mes2Si=NMes. The silanimine is yellow (λmax=296, 444 nm) and decomposes at temperatures above ca. −120 °C.
MATRIX ISOLATION OF A SILICON–NITROGEN DOUBLE BONDED SILAIMINE
Authors: Sekiguchi Akira , Ando Wataru , Honda Koichi 
Published: July 2006

Abstract
A silicon–nitrogen double-bonded silaimine was isolated in the matrix at low temperature by the photolysis of (dimesityl)(trimethylsilyl)silylazide. The silaimine has an intense orange color, and shows electronic absorption bands at 272 and 474 nm assigned to π-π* and n-π* transitions respectively.
A NEW AND EFFECTIVE AMINOMETHYLATION BY THE USE OF N-(p-TOLUENESULFONYLMETHYL)-p-TOLUENESULFONAMIDE AS AN EQUIVALENT OF METHANIMINE. A CONVENIENT PREPARATION OF PYRROLE COMPOUNDS
Authors: Kinoshita Hideki , Inomata Katsuhiko , Hayashi Masatoshi , Kondoh Takeshi , Kotake Hiroshi 
Published: July 2006

Abstract
Readily available N-(p-toluenesulfonylmethyl)-p-toluenesulfonamide was treated with base to generate N-methylene-p-toluenesulfonamide which reacted with a variety of nucleophiles forming the corresponding N-tosyl-aminomethylated compounds in good yields. Furthermore, the N-tosyl-aminomethylated acetals thus obtained were converted into the corresponding N-tosylpyrroles with the aid of acid catalyst in excellent yields.
STABILIZATION AND FACILITATED DEPOSITION OF SURFACE MONOLAYERS OF FLUOROCRBON AMPHIPHILES THROUGH POLYION COMPLEX FORMATION
Authors: Higashi Nobuyuki , Kunitake Toyoki 
Published: July 2006

Abstract
Bilayer-forming ammonium amphiphiles with one, two, or three fluorocarbon chains formed surface monolayers on water, which were stabilized by polyions in the subphase and deposited on polycarbonate films as polyion complexes by the Langmuir–Blodgett technique.
Inverse Klemer–Rodemeyer Fragmentation. Application to the Synthesis of Positional Isomers of Ristosamine and Acosamine
Authors: Morin Christophe 
Published: July 2006

Abstract
Application of the Klemer–Rodemeyer fragmentation to a 4-O-silicon substituted rhamnose benzylidene acetal leads to “inverse opening” of the dioxolane ring, thus opening a new route to 2-amino-2,3,6-trideoxy-l-hexoses.
Catalytic Action of Metal Salts in the Amination of 5,8-Quinolinediones
Authors: Yoshida Katsuhira , Yamamoto Mayumi , Ishiguro Miwa 
Published: July 2006

Abstract
The catalytic effects of some metal ions on the amination of 5,8-quinolinedione have been investigated. The reactions were specifically promoted by nickel(II) ion, and 6-aminated products were exclusively obtained. The metal chelate complex was proposed as an activated intermediate.
Synthesis of N-Arylhydroxylamines by Tellurium-Catalyzed Reduction of Aromatic Nitro Compounds
Authors: Uchida Shuji , Yanada Kazuo , Yamaguchi Hiromi , Meguri Haruo 
Published: July 2006

Abstract
p-Substituted nitrobenzenes were readily reduced with sodium borohydride and a catalytic amount of tellurium to give the corresponding hydroxylamines in good yields.
ELECTROPHILIC REACTION OF ALLYL ACETATES WITH ELECTROGENERATED CARBANIONS IN THE PRESENCE OF Pd(0)-CATALYST
Authors: Minato Makoto , Nonaka Tsutomu , Fuchigami Toshio 
Published: July 2006

Abstract
Counter cation effect on the Pd(0)-catalyzed electrophilic reaction of allyl acetates with carbanions was studied by using the electrogenerated carbanions having various kinds of counter cations.
Photoreaction of 1,6-Disubstituted-1,3,5-hexatriynes with 2,3-Dimethyl-2-butene
Authors: Shim Sang Chul , Lee Tae Suk 
Published: July 2006

Abstract
Irradiation of 1-phenyl-6-methyl- and 1,6-diphenyl-1,3,5-hexatriynes with N2 purged 2,3-dimethyl-2-butene yields 1:2 photoadducts, 1-(1′-phenylethynyl-2′,2′,3′,3′-tetramethylcyclopropyl)-2-(1″,2″,2″,3″,3″”-pentamethylcyclopropyl)acetylene and 1-(1′-phenylethynyl-2′,2′,3′,3′-tetramethylcyclopropyl)-2-(1″-phenyl-2″,2″,3″,3″-tetramethylcyclopropyl)acetylene, respectively. The photoaddition reactions seem to proceed from the triplet excited states.
A NEW TRANSFORMATION OF ALDOSE DERIVED SYNTHONS TO PSEUDO-HEXOPYRANOSE OR PSEUDO-PENTOFURANOSE DERIVATIVES
Authors: Tadano Kin-ichi , Maeda Hiroo , Hoshino Masahide , Iimura Youichi , Suami Tetsuo 
Published: July 2006

Abstract
The d-ribose or d-erythrose derived acyclic synthon, which possesses a 2-malonyl carbon chain at C-1 position, was cyclized stereoselectively to a six- or five-membered carbocycle. Those carbocycles were converted into pseudo-β-l-mannopyranose derivatives or pseudo-β-l-arabinofuranose derivatives efficeintly.
A Regio- and Stereoselective Michael Addition of Amide Dienolates to α,β-Unsaturated Esters
Authors: Yamaguchi Masahiko , Hamada Michiyuki , Kawasaki Shinji , Minami Toru 
Published: July 2006

Abstract
β-Alkyl-α-vinylglutaramides with threo- or erythro-configuration were synthesized stereoselectively by the Michael addition of amide dienolates to α,β-unsaturated esters.
ALKYLATION OF CHLOROBENZENE WITH CH3OH OVER H-MORDENITE TREATED WITH CHLOROFLUOROBENZENE
Authors: Horie Osamu , Okazaki Susumu 
Published: July 2006

Abstract
The vapor phase alkylation of chlorobenzene was promoted by H-mordenite treated with chlorofluoromethane. Ortho alkylation was preferentially promoted in the catalytic reaction after process times of 1 h.
INCLUSION COMPLEXES OF 1,1,2,2-TETRAPHENYLETHANE-1,2-DIOL AND 1,1,2,2-TETRAPHENYLETHANE
Authors: Toda Fumio , Tanaka Koichi , Wang Yu , Lee Gene-Hsiang 
Published: July 2006

Abstract
The title compounds were found to be good host molecule for various organic guests. In the crystal structures of the 2:1 p-xylene inclusion complexes of the title host molecules, each p-xylene molecule is surrounded by four phenyl groups of the two neighboring host molecules. Application of such inclusion phenomena to the separation of isomers was also reported.
Crystal Structure of the Tetramethylammonium Salt of trans-Dinitrobis(dimethylglyoximato)cobalt(III), [N(CH3)4][Co(C4H7N2O2)2(NO2)2]
Authors: Yoshida Noboru , Fujimoto Masatoshi , Furusaki Akio , Matsumoto Takeshi 
Published: July 2006

Abstract
Crystal structure of the tetramethylammonium salt of trans-dinitrobis(dimethylglyoximato)cobalt(III), NMe4[Co(dmgH)2(NO2)2], is reported. The results of X-ray diffraction analysis reveal that the difference in the stretching frequency mode between IR spectrum of NMe4[Co(dmgH)2(NO2)2] and that of Na[Co(dmgH)2(NO2)2]·2H2O results from the difference in the coordination mode of the equatorial ligand dmgH and in the orientation of axial NO2− and Co–N(NO2) distance.
Preparation of New Phthalocyanine Complexes of Yttrium(III) and Some Lanthanoid(III) Ions
Authors: Kasuga Kuninobu , Ando Munenori , Morimoto Hideharu , Isa Mikio 
Published: July 2006

Abstract
Phthalocyanine complexes of yttrium(III) and lanthanoid(III) ions, Pc3Ln2 (Pc = phthalocyanine anion, Ln = lanthanoid(III) cation) were prepared and characterized. A Q band undergoes a blue shift with a decrease in ionic radius of the lanthanoid(III) ions, while an X band undergoes a red shift.
STABILIZATION OF MONOOXOMOLYBDENUM(V) COMPLEXES [MoO(SR)4]1− USING PEPTIDE THIOLATO AND BULKY AROMATIC THIOLATO LIGANDS
Authors: Ueyama Norikazu , Zaima Hiroaki , Nakamura Akira 
Published: July 2006

Abstract
Mononuclear monooxomolybdenum(V) peptide complexes having hydrophobic amino acid residues adjacent to Cys residue, [MoO(Z-cys-Val-OMe)4]1− and [MoO(Z-cys-Pro-Leu-cys-OMe)2]1−, exhibit large A|| values (54.2×10−4 cm−1 and 56.6×10−4 cm−1, respectively) in the EPR spectra. Other monooxomolybdenum(V) complexes having bulky thiolato ligands, [NEt4][MoO(tmbt)4] (tmbt = 2,4,6-trimethylbenzenethiolato) and [NEt4][MoO(tipbt)4] (tipbt = 2,4,6-triisopropylbenzenethiolato), have been prepared. These have a covalent Mo=O bond as evidenced by the EPR (large A|| of 57.6×10−4 cm−1), and high v(Mo–O) (944 cm−1) from Raman spectroscopy on the latter complex). Electrochemical reduction of these complexes results in removal of the oxo ligand.
CATHODIC POLYMERIZATION OF VALINE N-CARBOXY ANHYDRIDES(NCA’S)
Authors: Komori Tetsuo , Nonaka Tsutomu , Fuchigami Toshio 
Published: July 2006

Abstract
Valine N-carboxy anhydrides(NCA’s) were very smoothly polymerized with electrogenerated bases(EGB) to give the polyvalines in high yields.
A Monoclinic Modification of an Ion Radical Salt, (HMTTeF)4(PF6)2, and Its Solid State Properties
Authors: Li Zhu Shi , Matsuzaki Susumu , Kato Reizo , Kobayashi Hayao , Kobayashi Akiko , Sano Mizuka 
Published: July 2006

Abstract
A unit cell contains four formula units. In each formula unit, three hexamethylenetetratellurafulvalene (HMTTeF) molecules are stacked to form a triad over which two electrons are delocalized and the remaining one of neutral nature is positioned between the triads. The crystal has an electrical conductivity of 23 S cm−1 at 293 K with an activation energy of 0.023 eV.
Asymmetric Reduction of Chiral Acetophenone Oxime Ethers to Optically Active Primary Amines
Authors: Itsuno Shinichi , Tanaka Kazuo , Ito Koichi 
Published: July 2006

Abstract
Chiral oxime ethers were synthesized from Na salt of acetophenone oxime and chiral halides, tosylates, or N-tosylaziridines which were derived from β-pinene or α-amino acids. Asymmetric reduction of the chiral oxime ether with LiAlH4 or BH3·THF gave the optically active primary amine.
Enzymatic Resolution of N-Acetyl p-Nitrophenylserinates
Authors: Chênevert Robert , Létourneau Martin 
Published: July 2006

Abstract
Asymmetric hydrolysis of alkyl (methyl and ethyl) (±)-erythro-p-nitrophenylserinates by α-chymotrypsin afforded optically active esters in optical purities above 95%, but alkyl (±)-threo-p-nitrophenylserinates were not hydrolyzed.
FLUORESCENCE QUENCHING STUDY OF EuII-CROWN ETHER COMPLEXES BY 5-SUBSTITUTED-1,3-DIMETHYLURACILS
Authors: Ishida Akito , Toki Susumu , Takamuku Setsuo 
Published: July 2006

Abstract
Fluorescence of EuII-crown ether complexes was quenched by 5-substituted-1,3-dimethyluracils. The quenching rate constant increased with increasing the electron-withdrawing properties of the substituents which supports the electron-transfer mechanism proposed for the EuIII/EuII photoredox system. A cavity size of the crown ether also influenced the quenching process.
Reaction of 1,2-Epoxyalkylsilanes with Azides. Stereoselective Synthesis of 1-Azide-2-hydroxyalkylsilanes as a Synthetic Equivalent of 1-Aminoalkene
Authors: Tomoda Shuji , Matsumoto Yuzo , Takeuchi Yoshito , Nomura Yujiro 
Published: July 2006

Abstract
The reaction of 1,2-epoxyalkylsilanes with azidotrimethylsilane or sodium azide provided 1-azido-2-hydroxyalkylsilanes stereoselectively, one of which was successfully converted into a 2-aza-1,3-diene by a three-step reaction sequence.
Synthesis and Luminescence Properties of Di- and Tri-methylene Linked Tris(2,2′-bipyridine)ruthenium(II) Complex Dimers. Ground-Excited State Interaction
Authors: Furue Masaoki , Kuroda Noritaka , Nozakura Shun-ichi 
Published: July 2006

Abstract
Di- and tri-methylene-linked Ru(bpy)32+ complexes 2 were synthesized. The luminescence properties of 2 were compared with those of its component monomer. In the excited 2 systems, the intramolecular interaction leading to the enhanced quenching or the formation of a new triplet excimer was not observed.
Optical Resolution of β-Blockers by HPLC on Cellulose Triphenylcarbamate Derivatives
Authors: Okamoto Yoshio , Kawashima Mitsunobu , Aburatani Ryo , Hatada Koichi , Nishiyama Toshimi , Masuda Motokazu 
Published: July 2006

Abstract
Optical resolution of five β-adrenergic blocking agents (β-blockers) alprenolol, oxyprenolol, propranolol, pindolol, and atenolol was examined by HPLC on 13 chiral stationary phases composing of cellulose triphenylcarbamate derivatives. All β-blockers were completely resolved on a cellulose tris(3,5-dimethylphenylcarbamate) column.
Structure and Absolute Configuration of Isodictytriol, a New Diterpene from the Brown Alga Dictyota dichotoma
Authors: Kusumi Takenori , Nkongolo Dave Muanza , Ishitsuka Midori , Inouye Yoshinobu , Kakisawa Hiroshi 
Published: July 2006

Abstract
A new diterpene, isodictytriol, was isolated from the brown alga, Dictyota dichotoma, and its structure and absolute configuration were elucidated by means of spectral analyses and chemical transformations.
Generation and C-Ethoxythiocarbonylation of Enolates Using Ultrasound
Authors: Palominos Mario A , Rodriguez Robinson , Vega Juan C 
Published: July 2006

Abstract
O-Ethyl 3-oxothionoesters were obtained in good yields by reaction of O,O-diethyl trithiodicarbonate with enolate from ketones and NaH in tetrahydrofuran. The enolate formation and thioacylation were performed under ultrasonic irradiation.
Catalytic Properties of La2−xSrxCoO4, a K2NiF4-Type Mixed Oxide
Authors: Nitadori Taihei , Misono Makoto 
Published: July 2006

Abstract
Catalytic activities of La2−xSrxCoO4, a K2NiF4-type mixed oxide, for propane oxidation increased with the extent of Sr substitution upto x = 1, and then decreased for x ≥ 1. This variation was in parallel with the reducibility or the oxidizing power of the catalyst surface. Stoichiometry determined by the iodometry showed that the excess oxygen which was present for x = 0 decreased with x upto x = 1, and the oxide became oxygen-deficient for x ≥ 1.5.
The Structure of Heptapotassium Tridecavanadomanganate (IV) Octadecahydrate, K7[MnV13O38]·18H2O
Authors: Nagai Kenji , Ichida Hikaru , Sasaki Yukiyoshi 
Published: July 2006

Abstract
Mr=1923.1, tetragonal, I4/mmm, a=11.366(2), c=19.638(6)Å, V=2537(1) Å3, Z=2,Dx=2.52 g cm−3, MoKα, λ =0.71069 Å, μ =3.12 mm−1, F(000)=1882, R=0.097 for 566 independent reflections. The crystal of K7[MnV13O38]·18H2O was found to be isomorphous to that of K7[NiV13O38]·18H2O. Corresponding interatomic distances between the two anions are essentially equal to each other. V–O bond distances range from 1.59 to 2.38 Å. One of the three K+ ions is tightly surrounded by 6–8 O atoms of the polyanions.
ENZYME-LIKE ENANTIOSELECTIVE CATALYSIS IN THE SPECIFIC COAGGREGATE SYSTEM OF VESICULAR AND MICELLAR SURFACTANTS
Authors: Ueoka Ryuichi , Matsumoto Yoko , Yoshino Takashige , Hirose Takashi , Kikuchi Jun-ichi , Murakami Yukito 
Published: July 2006

Abstract
The enzyme-like enantioselective catalysis (ka,obsdL = 1300 dm3 mol−1 s−1 and ka,obsdD = 0) was attained for the hydrolytic cleavage of p-nitrophenyl N-dodecanoyl-d(l)-phenylalaninate by N-benzyloxycarbonyl-l-phenylalanyl-l-histidyl-l-leucine in the large and stable vesicular system composed of 59 mol% ditetradecyldimethylammonium bromide and 41 mol% hexadecyltrimethylammonium bromide at 30 °C in 0.02 mol dm−3 Tris/0.02 mol dm−3 KCl buffer.
A New Iron (III) Porphyrin System for Olefin Epoxidation Catalysts
Authors: Takagi Shigeru , Takahashi Eitaro , Miyamoto T Ken , Sasaki Yukiyoshi 
Published: July 2006

Abstract
The iron (III) porphyrin-hypochlorite systems have been developed into the efficient catalysts. Successful epoxidation of olefins (styrene, α-methylstyrene, cyclohexene, and cyclooctene) using these catalytic systems have been demonstrated.
Polymorphism in Solid (CH3)3CCl as Studied by the Method of Differential Thermal Analyses and Nuclear Magnetic Resonance
Authors: Ohtani Sachie , Hasebe Tooru 
Published: July 2006

Abstract
A differential thermal analysis was performed on solid (CH3)3CCl and a new solid phase was found at saturated vapor pressure of the sample. This phase exists between 217.7 K and 219.5 K. Temperature dependence of the 1H-NMR free induction decay time, T2*, shows the onset of a new molecular motion in this phase.
Linear Relationship between First Ionization Potential (IP) of Element and ι(iota) Value. Removal of Periodicity
Authors: Inamoto Naoki , Masuda Shozo 
Published: July 2006

Abstract
The plot of square root of IP against ι value exhibited two straight lines depending on the type of the outer shell being s- or p-valence orbital. The stretching frequencies of H-X and HnX species also showed a linear correlation with ι after correction using the reduced mass.
Photoelectrochemical Deposition of Metals on TiO2 Powders in the Presence of Alcohols
Authors: Baba Ryo , Konda Ryuhei , Fujishima Akira , Honda Kenichi 
Published: July 2006

Abstract
Photodeposition of Pt, Ag and Au was performed on an anodically biassed TiO2 electrode in a solution containing “current-doubling” alcohols. Indirect reduction of the metal ions by the radical intermediates produced from the alcohol is, thus, suggested to participate in the photocatalytic preparation of metal-loaded TiO2 powders.
[2+2] Cycloaddition of Alkenyl Sulfide with α,β-Unsaturated Ketone. A Convenient Route to 1-Cyclobutenyl Ketones
Authors: Takeda Takeshi , Fujii Toshio , Morita Koichi , Fujiwara Tooru 
Published: July 2006

Abstract
2-Phenylthiocyclobutyl ketones were produced by the reaction of alkenyl sulfides with α,β-unsaturated ketones in the presence of AlCl3. The oxidation with MCPBA and the treatment with LDA or KH of the cycloadducts afford the corresponding 1-cyclobutenyl ketones in good yields.
Preparation of Perovskite-type Mixed Oxide (La1−XSrXCoO3) Supported on Cordierite. An Efficient Combustion Catalyst
Authors: Mizuno Noritaka , Fujii Hiroaki , Misono Makoto 
Published: July 2006

Abstract
La1−xSrxCoO3, a perovskite-type mixed oxide, was successfully formed on the surface of cordierite by impregnation with an aqueous solution of starting materials and subsequent calcination, when the cordierite was precoated with adequate amount of lanthanum oxide. Effect of Sr substituton for La was similar to the perovskite bulk itself, and a high catalytic activity for oxidation of propane was obtained at x = 0.2.
Preparation and Reactions of Titanium(III) Chloride Solubilized in Inert Organic Solvents
Authors: Suzuki Hitomi , Manabe Hajime , Enokiya Rika , Hanazaki Yasuaki 
Published: July 2006

Abstract
Titanium(IV) chloride reacts with dialkyl telluride in inert solvents such as dichloromethane or benzene to form a stable homogeneous solution of titanium(III) species. Reduction of several organic functionalities has been carried out using the low valent titanium solution thus obtained.
Novel Chiral Stationary Phases for the Resolution of the Enantiomers of Amino Acids by Ligand Exchange Chromatography
Authors: Yuki Yoichi , Saigo Kazuhiko , Tachibana Kouzou , Hasegawa Masaki 
Published: July 2006

Abstract
Novel chemically bonded chiral stationary phases (CSP’s) derived from (1R,2S)-2-carboxymethylamino-1,2-diphenylethanol and from (1S,2S)-2-carboxymethylamino-1,2-diphenylethanol were prepared. The ligand exchange chromatography on these CSP’s was found to be effective for the direct resolution of the enantiomers of amino acids.
On the Acidity of the Hydroxyl Groups in Calix[4]arenes and the Dissociation-dependent Conformational Change
Authors: Shinkai Seiji , Araki Koji , Koreishi Hiroshi , Tsubaki Takayuki , Manabe Osamu 
Published: July 2006

Abstract
By using a water-soluble calix[4]arene derivative and a p-nitro-substituted calix[4]arene the pKa values of the OH groups were determined for the first time. The first dissociation occurred at pH &lt; 1 while the dissociation of the last proton occurred at pH &gt; 11, indicating that these molecules have a super-acidic proton as well as a super-basic oxy-anion within a molecule. We also found that the calixarene conformation changes as a function of medium pH. These novel findings are rationalized in terms of strong intramolecular hydrogen bonding among the OH groups.