bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of Rates of Dissociation of an Olefin Ligand in an Olefin–Platinum Complex by Dynamic NMR Spectroscopy
Authors: Toyota Shinji , Oki Michinori
Published: July 2006

The double-doublet signal due to isopropyl-methyl protons in trans-dichloro(4-methyl-1-pentene)(4-methoxycarbonylpyridine 1-oxide)platinum(II) shows the change in line shapes at high temperatures in its 1H NMR spectra, owing to the racemization process, which involves the dissociation of the olefin. The activation parameters were obtained for CDBr3 solutions as follows: ΔH‡ 17.6±0.5 kcal mol−1, ΔS‡ −2.7±1.3 cal mol−1 K−1. Incidentally, this is the first observation of the racemization of an olefin-metal complex by the dynamic NMR method.
Asymmetric Transformation of Dl-4-Thiazolidinecarboxylic Acid
Authors: Shiraiwa Tadashi , Kataoka Kazuo , Kurokawa Hidemoto
Published: July 2006

A mixture of Dl-4-thiazolidinecarboxylic acid (Dl-THC), (+)- or (−)-tartaric acid ((+)- or (−)-TA), and salicylaldehyde in acetic acid was stirred at 80 °C to give a salt composed of equimolar amounts of l-THC and (−)-TA or that of D-THC and (+)-TA. d- and l-THC with optical purity of 97–99% were obtained from these salts in 68–78% yield.
Regiospecific Formations of Thieno[3,2-a]indolizine and Thieno[2,3-b]indolizine Derivatives
Authors: Kakehi Akikazu , Ito Suketaka , Matsumoto Shin-ichi , Morimoto Yuichiro
Published: July 2006

The alkaline treatment of ethyl l-cyano-2-(ethoxycarbonylmethylthio)indolizine-3-carboxylates and diethyl 2-(ethoxycarbonylmethylthio)indolizine-1,3-dicarboxylates afforded the corresponding diethyl 1-aminothieno[3,2-a]indolizine-2,4-dicarboxylates and diethyl 3-hydroxythieno[2,3-b]indolizine-2,9-dicarboxylates in good yields.
Chemically Reactive Liposomes as a New Type of Sensor for Proteins
Authors: Matsumura Hideo , Aizawa Masayuki , Yokoyama Hiroshi , Kamei Hirotake
Published: July 2006

A new type of sensor for proteins has been developed by utilizing a liposome which contains molecules chemically reactive with protein on the membrane surface of the liposome. The covalently bound aggregation of proteins with liposomes has been observed by a quasi-elastic light scattering measurement at the concentration down to about 10−8 mol dm−3
Crystalline Inclusion Compounds of 2,2′-Dihydroxy-1,1′-binaphthyl with Alkali Metal Hydroxides and Ammonia
Authors: Toda Fumio , Tanaka Koichi , Wong Man Chaun , Mak Thomas C W
Published: July 2006

2,2′-Dihydroxy-1,1′-binaphthyl, C20H14O2 from crystalline inclusion compounds of stoichiometries 1\frac12C20H14O2·3MOH·8H2O (M = Li,Na,K), C20H14O2·CsOH·6H2O, and 2C20H14O2·2NH3·CH3OH. In the crystal structure of the NH3 complex, the three molecular components are interlinked by hydrogen bonds to form a column with a hydrophilic stem and a hydrophobic sheath.
A Columnar Cholesteric Liquid Crystal Based on Phthalocyanine Core
Authors: Cho Iwhan , Lim Youngsoo
Published: July 2006

A new columnar cholesterogen based on the octasubstituted phthalocyanine(PcH2), (+)-2,3,9,10,16,17,23,24-octakis[4-(dodecyloxy)-2-oxa-pentyl ]-phthalocyanine (1), is described. The chiral PcH2  1 exhibited classical cholesteric textures in which the transition of platelet to fan-shaped texture was observed (K\xrightarrow23°CM\xrightarrow158°CI). This is the first instance of columnar cholesterogen observed with disc-like liquid crystal systems.
Conformational Effects in High Resolution Solid State CP/MAS 13C NMR Spectra of Thermotropic Ester Compound, 4′-Cyanophenyl-4-n-pentoxybenzoate
Authors: Uryu Toshiyuki , Kato Takashi
Published: July 2006

The crystalline solid state structure of thermotropic ester compound, 4′-cyanophenyl-4-n-pentoxybenzoate (CPPOB) was examined by high resolution solid state CP/MAS (Cross Polarization/Magic Angle Spinning) 13C NMR. Conformational effects were revealed by line splittings in the solid state spectra.
The Michael Reaction of Various Quinones with Silyl Enol Ethers. A Facile Method for the Preparation of Benzofuran and Indole Derivatives
Authors: Mukaiyama Teruaki , Sagawa Yukihiro , Kobayashi Shu
Published: July 2006

In the presence of a catalytic amount of trityl perchlorate, 1,4-benzoquinone, quinone monoimides, or imidoquinones react with silyl enol ethers to produce the corresponding benzofuran or indole derivatives in high yields via the corresponding Michael adducts.
Unexpected Enzymatic N1-Glycosidation of Benzotriazoles as Evidenced by 15N-NMR Spectroscopy
Authors: Tono-oka Shuichi
Published: July 2006

In contrast to N2-glycosidation for indazoles, benzotriazoles were found to undergo a regiospecific N1 -glycosidation in the NADase-catalyzed transglycosidation reaction. The N1-ribosylated structure of benzotriazole dinucleotides obtained was established on the basis of 15N-NMR spectral data.
Complexes of Polythia[n](1,1′)ferrocenophanes with Pd(BF4)2. A Fe–Pd Dative Bond Formation Controlled by the Coordination of the Pd(II) Atom to the Sulfur Atoms of the Thiamacrocycle
Authors: Sato Masaru , Suzuki Kaoru , Akabori Sadatoshi
Published: July 2006

Tetrathia- and trithia[n]ferrocenophanes formed 1:1 complexes with Pd(BF4)2. The spectral data proved the presence of a Fe–Pd bonding interaction for the Pd(II) complexes of 1,5,9-trithia[9]-and 1,4,7-trithia[7](1,1′)ferrocenophanes.
Pentacoordinate Hydridosiliconates with Bidentate Ligands Derived from Hexafluorocumyl Alcohol. Characterization and Reduction of Carbonyl Compounds
Authors: Kira Mitsuo , Sato Kazuhiko , Sakurai Hideki
Published: July 2006

Pentacoordinate hydridosiliconates were prepared via the reaction of trichlorosilane with dilithiated hexafluorocumyl alcohol and characterized spectroscopically. The facile reduction of carbonyl compounds with the siliconates is indicative of the highly activated Si–H bond in the anionic hydridosiliconates.
A General Synthetic Method for α-Methylene Compounds by the Palladium-Catalyzed Decarboxylation-Deacetoxylation of Allyl α-Acetoxymethylcarboxylates Substituted by an Electron-Withdrawing Group at α-position
Authors: Tsuji Jiro , Nisar Mohammad , Minami Ichiro
Published: July 2006

Allyl α-acetoxymethylcarboxylates substituted by ester, amide, nitro, cyano, and sulfonyl groups at α-position undergo smooth palladium-catalyzed decarboxylation-deacetoxylation under mild neutral conditions to afford corresponding α-methylene compounds in high yields.
Long Optical Path Length Thin-Layer Spectroelectrochemistry. Catalytic Oxidation of Hydroquinones by Oxygen at Platinum
Authors: Gui Yupeng , Kuwana Theodore
Published: July 2006

A clean, open-circuited Pt electrode, in the presence of dissolved oxygen, catalyzes the oxidation of hydroquinones in 1 M H2SO4. The oxidation rate is independent of hydroquinone, but dependent upon O2 concentration. If iodine is preadsorbed onto the pt surface, the catalysis is inhibited, although reversible electron transfer to electrolyze the dissolved hydroquinone is not.
Freezing of Equilibrium of 1,2,4-Triazole by Complex Formation with 1,1-Di(2,4-dimethylphenyl)but-2-yn-1-ol, and X-Ray Crystal Structure of the Complex
Authors: Toda Fumio , Tanaka Koichi , Elguero Jose , Nassimbeni Luigi , Niven Margaret
Published: July 2006

Of the two tautomeric isomers of 1,2,4-triazole, 1,2,4-triazacyclopenta-3,5-diene and 1,2,4-triazacyclopenta-2,5-diene, the former was isolated as a 1:1 complex with the title host compound. X-Ray analysis of the complex reveals that the two molecular components are linked by hydrogen bonds with the triazole molecules lying in channels running parallel to the b axis, cutting a near O and c near 1/4.
Binuclear Copper (II) Complexes of Aminopolycarboxylic Acids with an Alcoholic OH Group in the Alkyl Chain Linkage. Model Complexes for Type 3 Copper with Respect to Bridging Ligands
Authors: Kawata Satoshi , Iwaizumi Masamoto , Kosugi Hiroshi , Yokoi Hiroshi
Published: July 2006

It has been revealed by potentiometry and ESR spectroscopy that the binuclear copper (II) complexes of 2-hydroxy-1,3-diaminopropane-, 2-hydroxy-1,4-diaminobutane-, and 3-hydroxy-1,5-diaminopentane-N,N,N′,N′-tetraacetic acids deprotonate the alcoholic OH groups at pH < 6 to form μ-alkoxo bridges. Especially the last complex has been found to form a μ-alkoxo and μ-hydroxo double bridging complex at a step at pH 5.8.
Preparation of Tungsten(V) Aqua Ion, W2O2S2(aq)2+, and X-Ray Structure of Di-μ-sulfido-bis[(cysteinato)oxotungstate(V)] Ion, [W2O2S2(cys)2]2−
Authors: Shibahara Takashi , Izumori Yukiharu , Kubota Reiko , Kuroya Hisao
Published: July 2006

Di-μ-sulfido tungsten(V) dimers, [W2O2S2(cys)2]2− (1) and W2O2S2(aq)2+ (2) have been prepared and characterized. The structure of the former has been determined by the X-ray crystal structure analysis. The W–W bond distance is 2.843(1) Å. Peak positions of electronic spectra are : 428 nm (ε=259 M−1 cm−1 per dimer; 1 M = 1 mol dm−3), 330sh (3920), and 276 (10760) for 1; 435 (144), 320 (2640), and 263 (7180) for 2.
Conformation of Dithia[3.3](1,3)azulenopyridinophanes
Authors: Fukazawa Yoshimasa , Ohta Emi , Nakabai Tatsuya , Usui Shuji
Published: July 2006

The preferred conformations and the dynamic processes of the title compounds have been determined by variable temperature 1H-NMR analysis. Molecular mechanics calculations suggested the detail course of the conformational interconversion.
Correction of Collision-Induced Polarizabilities to the Depolarized Rayleigh Scattering by Dilute Solutions of Oligomers and Polymers
Authors: Yoshizaki Takenao , Yamakawa Hiromi
Published: July 2006

It is shown that the correction of collision-induced polarizabilities to the depolarized Rayleigh scattering intensity may be made using a usual light-scattering photometer with a mercury lamp as a light source if its spectral distribution is narrow.
Vapour-Phase Carbonylation of Methanol over Tin Catalyst Supported on Active Carbon
Authors: Omata Kohji , Yagita Hiroshi , Shikada Tsutomu , Fujimoto Kaoru , Tominaga Hiro-o
Published: July 2006

A Tin-active carbon showed a catalytic activity for the vapour phase carbonylation of methanol under pressurized conditions in the presence of methyl iodide promoter.
Oxygen Induced Free-Radical Addition of Benzeneselenol to Allenes
Authors: Masawaki Teruyuki , Ogawa Akiya , Kambe Nobuaki , Ryu Ilhyong , Sonoda Noboru
Published: July 2006

The addition of benzeneselenol to mono- and disubstituted allenes proceeded in the presence of oxygen to give vinyl selenides in excellent yields. This reaction is likely to involve a radical chain process initiated by oxygen.
Spontaneous Nitridation of Ultrafine Particles of Ni during NO/CO Reaction
Authors: Egashira Yasuyuki , Komiyama Hiroshi
Published: July 2006

Ultrafine particles of Ni (UFP Ni) are highly active in the catalytic reduction of NO by CO, showing a complete conversion of NO to N2 at 573 K even for a large space velocity of 1.2×108 h−1 , but is subject to severe deactivation. Nitridation of UFP Ni, which occurred spontaneously during the cyclic operation of the reaction with deactivation followed by reactivation with CO reduction, remarkably suppresses the tendency toward deactivation.
A New Route to Benzo[a]quinolizine Derivative by the Intramolecular Radical Cyclization
Authors: Hirai Yoshiro , Hagiwara Atsushi , Terada Takashi , Yamazaki Takao
Published: July 2006

A synthesis of benzo[a]quinolizine derivatives by the radical cyclization of N-α-haloacetylisoquinoline compound is described.
Stereoselective Syntheses of Conjugated 1-Phenylthio-1,3-alkadienes and 1,3,5-Alkatrienes through the Palladium-Catalyzed Cross-Coupling Reaction of (E)- or (Z)-1-Alkenylboronates with (E)- or (Z)-2-Bromo-1-phenylthio-1-alkenes
Authors: Ishiyama Tatsuo , Miyaura Norio , Suzuki Akira
Published: July 2006

1-Phenylthio-1,3-alkadienes and 1,3,5-alkatrienes are obtained in excellent yields stereo- and regioselectively by the cross-coupling between 1-alkenyl or 1,3-alkadienyl-1,3,2-benzodioxaboroles and (E)- or (Z)-2-bromo-1-phenylthio-1-alkenes in the presence of a catalytic amount of Pd(PPh3)4. These sulfides are converted to the corresponding conjugated alkatrienes and tetraenes by the reaction with Grignard reagents in the presence of Ni-catalyst.
Fluorescence Microscopic Study of Change in Pyrene Cluster Size in Mixed Monolayers of Pyrene-Substituted and Normal Fatty Acids with Chain-Length Matching
Authors: Fujihira Masamichi , Nishiyama Katsuhiko , Hamaguchi Yuichi , Tatsu Yoshiro
Published: July 2006

Fluorescence microscopic observation of clusters of pyrene moieties in the mixed monolayer assembly of pyrene(Py)-substituted fatty acid (Py(CH2)nCOOH; n = 9, 15) and normal fatty acid (CH3(CH2)nCOOH; n = 18, 14) deposited from a water surface on a quartz plate was carried out. The cluster size was changed drastically depending upon difference between chain lengths of the constituent fatty acids.
Intramolecular Interaction of Remote Sulfur Lone-pairs through Homoconjugation
Authors: Kobayashi Keiji , Ohno Koichi , Ishida Toshimasa , Masuda Shigeru , Harada Yoshiya
Published: July 2006

The intramolecular interactions between the lone-pair electrons of remote sulfur atoms in tetrahydrobenzodithiophenes were revealed by means of the He (I) photoelectron spectroscopy and ab initio calculations.
A Conjugate Addition of Allylsilanes to α,β-Unsaturated Ketones Catalyzed by Trityl Perchlorate
Authors: Hayashi Masaji , Mukaiyama Teruaki
Published: July 2006

A conjugate addition of allylsilanes to α,β-unsaturated ketones was effectively promoted by a catalytic amount of trityl perchlorate to give the corresponding Michael adducts in good yields.
The Asymmetric Addition of the Sn(II) Enolates of Thioesters to α-Iminoesters. A Convenient Synthesis of Optically Active cis-Substituted β-Lactams.
Authors: Yamada Tohru , Suzuki Hiroshi , Mukaiyama Teruaki
Published: July 2006

The asymmetric addition of the Sn(II) enolates derived from thioesters to α-iminoesters having the chiral auxiliary on the nitrogen atom proceeds smoothly to afford syn-β-aminoacid derivatives, which are in turn converted to optically active cis-substituted β-lactams.
(2-Cyanoallyl)trimethylsilane and (2-Cyanoethyl)trimethylsilane. Unique σπ Captodative Systems
Authors: Sakurai Hideki , Kyushin Soichiro , Nakadaira Yasuhiro
Published: July 2006

Addition reactions of (2-cyanoallyl)trimethylsilane as well as hydrogen abstraction reactions of (2-cyanoethyl)trimethylsilane were examined. These compounds exhibit high reactivities in free-radical reactions, demonstrating existence of the σπ captodative effect.
Comparison of the Catalytic Behaviors of Single Cubane MoFe3S4 and Fe4S4 Clusters toward the Multi-electron Reduction of n-C5H11N3
Authors: Tanaka Koji , Moriya Makoto , Tanaka Toshio
Published: July 2006

The reduction of n-C5H11N3 by Na2S2O4 was investigated in an aqueous Triton X-100 micellar solution containing methylviologen and [MoFe3S4(S-p-n-C6H4C8H17)3(O2C6Cl4)(Me2CO)]2− (1) or [Fe4S4(S-p-n-C6H4C8H17)4]2− (2). 1 catalyzes the reduction of n-C5H11N3 not only with two electrons but also with six and eight electrons to afford n-C5H11NH2, N2, N2H4, and NH3, while 2 catalyzes only two electron reduction of n-C5H11N3.
Chemical Studies on Myctophina Fish Bioluminescence
Authors: Inoue Shoji , Okada Kunisuke , Tanino Hideo , Kakoi Hisae
Published: July 2006

A new type of masked Watasenia preluciferin was isolated from the liver of myctophina fish and its structure was determined as Watasenia preluciferyl β-d-glucopyranosiduronic acid.
The Polarographic Study on the Interaction between Halide Anions and Lithium Cation or Acids in Acetonitrile
Authors: Hojo Masashi , Nagai Hironori , Hagiwara Minoru , Imai Yoshihiko
Published: July 2006

A new polarographic method to study complex formation has been applied to the anodic waves of halide ions in acetonitrile. The formation of complexes, such as (Li+)2Cl−, (HR)2Cl− (HR = p-bromophenol), (Li+)(HR)Cl−, (Li+)2(HA)Cl− (HA = benzoic acid) was clarified.
Photocycloaddition Reaction of 5(E)-Styryl-1,3-dimethyluracil with Some Olefins
Authors: Shim Sang Chul , Shin Eun Ju
Published: July 2006

Photolysis of 5(E)-styryl-1,3-dimethyluracil(5(E)-SDU) with some olefins, such as tetramethylethylene, methyl crotonate, dimethyl ethylidenemalonate, and dimethyl maleate in dichloromethane yields [2+2] cycloadducts along with E\ightleftarrowsZ photoisomerization and photocyclization products of 5-SDU. The [2+2] cycloaddition reaction with olefins occurs on the 5,6-double bond of uracil ring rather than the expected central double bond.
A New Ambient-pressure Superconductor, κ-(BEDT-TTF)2I3
Authors: Kato Reizo , Kobayashi Hayao , Kobayashi Akiko , Moriyama Shinji , Nishio Yutaka , Kajita Koji , Sasaki Wataru
Published: July 2006

Electrochemical oxidation of a solution containing BEDT-TTF, (n-C4H9)4NI3,and small amount of (n-C4H9)4NAuI2 gave a new ambient-pressure superconductor (Tc=3.6 K), which coexisted with the superconducting θ-type salt but was clearly distinguished by the X-ray examination. The crystal data are: (C10H8S8)2I3, monoclinic, P21/c, a=16.387(4), b=8.446(2), c=12.832(8) Å, β=108.56(3)°, V=1687.6 Å3, Z=2.
Transition-Metal Complex Catalyzed Polyfluoroalkylation. A Facile Synthesis of Fluorine-Containing Oxiranes and Enynes
Authors: Fuchikami Takamasa , Shibata Yoshiko , Urata Hisao
Published: July 2006

Palladium-catalyzed reaction of polyfluoroalkyl halides with allylic alcohols in the presence of potassium carbonate gives polyfluoroalkylmethyl-substituted oxiranes directly. Perfluoroalkyl-substituted enynes can be also prepared from perfluoroalkyl iodides and terminal alkynes under similar conditions.
Photo-induced Potential Changes across Poly(vinyl chloride)/2,3-Diphenylindenone Oxide Membrane
Authors: Sasaki Hiroshi , Ueno Akihiko , Osa Tetsuo
Published: July 2006

Membrane potential across Poly(vinyl chloride) entrapping 2,3-Diphenylindenone oxide was reversibly controlled by UV and visible light irradiation. The magnitude of photo-induced potential change depended upon the concentration of electrolyte solution.
Electrochemical Synthesis of Poly(p-phenylene vinylene) Films
Authors: Nishihara Hiroshi , Tateishi Masahiro , Aramaki Kunitsugu , Ohsawa Toshiyuki , Kimura Okitoshi
Published: July 2006

Electroreduction of α,α,α′,α′-tetrabromo-p-xylene at an indium tin oxide (ITO), platinum, copper or nickel electrode in ethereal solution afforded a thick and uniform poly(p-phenylene vinylene) film in the undoped state. Addition of Cr(CO)6 or Mo(CO)6 accelerated the film growth at the ITO electrode.
Reaction Control of Photoinduced Electron Transfer in Porphyrin–Viologen Linked System by the Use of External Magnetic Fields
Authors: Nakamura Hiroshi , Uehata Akihiro , Motonaga Akira , Ogata Takeshi , Matsuo Taku
Published: July 2006

Effects of external magnetic fields on electron transfer reactions in porphyrin–viologen linked systems (ZnPCnV) were investigated by laser photolysis. Rates of reverse electron transfer in the photogenerated intramolecular ion radical pair, as originated from quenching of porphyrin triplet by viologen, were remarkably suppressed (by a factor of ten for n=8) at above 0.1 T. The lifetime of the charge separated state could be correspondingly extended by the use of external magnetic fields, which perturb electron spin relaxation process.
CD Structure and Absolute Configuration of the (−)570CD-mer-(3-Azapentane-1,5-diamine)(N-methyliminodiacetato)cobalt(III) Ion
Authors: Okamoto Ken-ichi , Yasui Takaji , Hidaka Jinsai
Published: July 2006

The crystal structure and the absolute configuration of the title complex cation, (−)570CD-mer-[Co(mida)(dien)]+, was determined by the X-ray diffraction study of its (−)580CD-(ethylenediaminetetraacetato)cobaltate(III) salt dihydrate. The relationship between the absolute configuration and the CD spectra for the mer isomers of the dien complexes with mida or iminodiacetate is also reported.
Highly Conductive Crystals Prepared by Electrocrystallization of Potassium Dicyanophthalocyaninatoiron(III)
Authors: Orihashi Yuji , Ohno Hiroyuki , Tsuchida Eishun , Matsuda Hiro , Nakanishi Hachiro , Kato Masao
Published: July 2006

Inherently conductive (0.4 S.cm−1) crystals of cyanophthalocyaninatoiron(III) were prepared by electrocrystallization of potassium dicyanophthalocyaninatoiron(III) in acetonitrile. This crystal was suggested to have a three-dimensional interplaner overlapping of π-orbitals by X-ray diffraction.
Long-life Organic Solar Cell Fabrication Using Quinacridone Pigment
Authors: Manabe Katsutoshi , Kusabayashi Shigekazu , Yokoyama Masaaki
Published: July 2006

A hetero-junction organic solar cell coupled with electrochemically deposited CdS and 2,9-dimethyl quinacridone pigment was fabricated. Open-circuit voltage of 0.61 V and short-circuit photocurrent of 127 μA/cm2 with large fill-factor of 0.32 were obtained under 71 mW/cm2 white light, giving conversion efficiency of 0.04%. No fatigue was observed over a month continuous irradiation of 15 mW/cm2.
Vicarious Nucleophilic Substitution of Hydrogen versus Bis-Annulation in the Reaction of Chloromethyl Aryl Sulfone Carbanion with Electrophilic Arenes
Authors: M\kakosza Mieczyslaw , Glinka Tomasz , Ostrowski Stanislaw , Rykowski Andrzej
Published: July 2006

The carbanion of chloromethyl aryl sulfone reacts with 1-cyanonaphthalene to form a bis-annulated product whereas with 1-nitronaphthalene vicarious nucleophilic substitution of hydrogen takes place. This result and the bis-annulation of quinoxalines and naphthyridines which was reported earlier are rationalized in terms of the negative charge delocalization in the intermediate σ-adducts.
Synthesis and Properties of Tropones Fused with p-Benzoquinone and 1,4-Naphthoquinone
Authors: Kato Masahiko , Kasai Makiko , Shiraki Kaneto , Furuichi Kimiaki , Miwa Toshio
Published: July 2006

The first synthesis of 8H-cyclohepta[b]naphthalene-5,8,11-trione and 7H-benzocycloheptene-1,4,7-trione are described. The cyclic voltammograms of these compounds showed that the electron affinities of quinones are considerably increased by the annelation of a tropone ring.
X-Ray Structures of Electrochromic Compounds. Colorless 3,3-Dimethyl-2-(p-dimethylaminostyryl)indolino-[1,2-b]oxazoline and Colored 2-(p-Dimethylaminostyryl)-1-hydroxyethyl-3,3-dimethylindolinium Bromide
Authors: Kawami Satoshi , Yoshioka Hiroshi , Nakatsu Kazumi , Okazaki Tsuneki , Hayami Masaaki
Published: July 2006

The X-ray structure analyses of the title compounds have revealed that in the former intramolecular steric overcrowding of atoms around the spiro-carbon atom and a distortion of the oxazoline ring are present, while in the latter the hydroxyethyl group takes an adequate orientation for the reverse change.
Intradiol Oxygenation of 3,5-Di-t-butylcatechol Catalyzed by Iron(HI) Salts
Authors: Funabiki Takuzo , Konishi Toru , Kobayashi Shogo , Mizoguchi Akira , Takano Mikio , Yoshida Satohiro
Published: July 2006

3,5-Di-t-butylcatechol is oxygenated by Fe(III) salts without addition of ligands in THF/water, DMF, or DMF/aqueous borate buffer to give intradiol cleavage products. Intermediate formation of semiquinonatoiron(II) and catecholatoiron(III) complexes is indicated by electronic, MtJssbauer, ESR spectroscopy.
Investigation of Intermediate Radicals in the Grignard Reactions. Rates of Electron Transfer and of Successive R• Transfer to Ketones from Grignard Reagents
Authors: Maruyama Kazuhiro , Katagiri Toshimasa
Published: July 2006

In the Grignard reactions with benzil (diketone) and with benzophenones (monoketone) in THF rates of electron transfer and of successive R• transfer from Grignard reagents were determined by direct observations of intermediate radicals. The electron transfer rates from Grignard reagents to ketones are dependent on both the electrochemical properties of Grignard reagents and ketones.
Oxidative Addition Reaction of 1,3-Dialkyl-5-fluoro-6-iodouracils to Low-valent Transition Metal Complexes
Authors: Urata Hisao , Tanaka Mariko , Fuchikami Takamasa
Published: July 2006

cis-Oxidative adducts are isolated by the reaction of Pd(0) complexes or Pt (CH2=CH2 ) (PPh3)2 with 1,3-dialkyl-5-fluoro-6-iodouracils, and in palladium cases cis-adducts further isomerize to trans-ones in solution completely.
Peroxide Anions as Possible Active Species in Oxidative Coupling of Methane
Authors: Otsuka Kiyoshi , Said A A , Jinno Kiyotaka , Komatsu Takayuki
Published: July 2006

Oxidative coupling of CH4 forming C2H6 and C2H4 proceeded smoothly upon contact with Na2O2, BaO2, and SrO2 at low temperatures below 673 K. This indicates that O22− ions are very reactive for activation of CH4. O2− ions contained in the peroxides did not activate CH4.
Formation of Interribonucleoside Phosphate Bond by the Use of Reagent Formed by the Reaction of 2-Chlorophenyl Phosphorodichloridate with 5-Nitrobenzotriazole and Preparation of Anticodon Triplet of Yeast tRNALys
Authors: Seki Hiroshi , Mitsunobu Oyo
Published: July 2006

The reagent formed by the reaction of 2-chlorophenyl phosphorodichloridate with an equimolar amount of 5-nitrobenzotriazole was treated with protected ribonucleosides having free 3′-OH, followed by protected ribonucleosides having free 5′-OH in pyridine for 8 h (the second step), the corresponding dinucleoside phosphates being obtained in 55–84% yields. When the second step was carried out in the presence of 2,6-lutidine, the yields were increased to 80–90% within 2h. By this procedure, the anticodon triplet of yeast tRNALys was prepared in 71% yield.
Structures of 4,7,10-Trioxa-1,13-dithia[13](1,1′)ruthenocenophane and Its PdCl2 Complex
Authors: Akabori Sadatoshi , Sato Sadao , Habata Yoichi , Kawazoe Kayoko , Tamura Chihiro , Sato Masaru
Published: July 2006

The X-ray analysis of 4,7,10-trioxa-1,13-dithia[13](1,1′)ruthenocenophane and its PdCl2 complex revealed that the Pd atom bonded to the sulfur atoms of the ligand and the torsion angle (69.2°) around the z-axis of the ruthenocenophane nucleus in the metal-free ligand is much larger than the corresponding one (0.4°) in the complex. These results are completely opposite of the case of [10](1,1′)ruthenocenophane and its Pt complex.
New Entry to γ-Butyrolactams by Free Radical Cyclization of N-Allyl-α-chloro-α-(methylthio)acetamides. Formal Total Synthesis of (±)-Pseudoheliotridane
Authors: Ishibashi Hiroyuki , Sato Tatsunori , Irie Maki , Harada Suzumi , Ikeda Masazumi
Published: July 2006

Tributyltin hydride-azobisisobutyronitrile induced radical cyclization of N-allyl-α-chloro-α-(methylthio)acetamides afforded γ-butyrolactams. This method was applied to the formal total synthesis of (±)-pseudoheliotridane.
Crystal Structure of a Novel 1:2 Adduct from [2.2]Paracyclophane and N-Methylmaleimide
Authors: Matsumoto Kiyoshi , Okamoto Tadashi , Sera Akira , Itoh Kuniaki , Hamada Kensaku
Published: July 2006

The first direct X-ray crystal structure determination of a 1:2 adduct obtained by Diels–Alder reaction of [2.2]paracyclophane and N-methylmaleimide is reported, establishing the structure arising from 4,7- and 13,16-additions.
Wasabidienone-E, a New Cyclohexadienone Derivative Containing Hydroxyethylamino Group, from Potato Culture Solution of Phoma wasabiae Yokogi
Authors: Soga Osamu , Iwamoto Hidetoshi , Ota Yasutaka , Odoi Minoru , Saito Kiyoshi , Takuwa Akio , Nakayama Mitsuru
Published: July 2006

Wasabidienone-E, a new cyclohexadienone derivative containing hydroxyethylamino group, has been isolated from the potato culture solution, and its structure was determined to be 5-(2-hydroxyethylamino)-3-methoxy-2,6-dimethyl-(6R*)-[(2R*)-2-methylbutyryloxy]-2,4-cyclohexadien-1-one by spectroscopic analysis and chemical transformation.
Oxidation of Thymines with Hydrogen Peroxide in Hydrochloric Acid
Authors: Itahara Toshio
Published: July 2006

Oxidation of thymine and 1,3-dimethylthymine with hydrogen peroxide in hydrochloric acid (pH 1.0–2.2) at 35–38 °C gave the corresponding trans-5-chloro-6-hydroperoxy-5,6-dihydrothymines. The formation of the hydroperoxythymines was dependent on pH of the aqueous solutions. Reaction of the hydroperoxythymine with amino acids and nucleic acids related compounds in deuterium oxide was investigated by NMR spectroscopy.
Incomplete Cubane-Type Sulfur-Capped Aqua Ion, W3O2S24+ and X-Ray Structure of Ba[W3O2S2(N(CH2CO2)2(CH2CO2H))3]·9H2O
Authors: Shibahara Takashi , Takeuchi Atsushi , Kunimoto Takeshi , Kuroya Hisao
Published: July 2006

A triangular tungsten(IV) aqua ion with sulfur bridges, W3O2S24+ has been prepared and characterized. X-ray structure analysis of a derivative complex, [W3O2S2(Hnta)3]2−(H3nta = nitrilotriacetic acid) has revealed that its core is of structure of W3(μ2-O)2(μ2-S)(μ3-S). The electronic spectrum of the aqua ion has an absorption peak at 506 nm (ε = 381 M−1 cm−1 per trimer; 1 M = 1 mol dm−3).
Quantitative Formation of a [2.2]Paracyclophane Derivative via Topochemical Photoreaction of Crystal Complex of Ethyl and Propyl α-Cyano-4-[2-(4-pyridyl)ethenyl]cinnamates
Authors: Hasegawa Masaki , Maekawa Yasunari , Kato Satoshi , Saigo Kazuhiko
Published: July 2006

The complex with the composition ranging from 6:4 to 2:8 of ethyl α-cyano-4-[2-(4-pyridyl)ethenyl]cinnamate (1) and propyl α-cyano-4-[2-(4-pyridyl)ethenyl]cinnamate (2) photodimerized quantitatively into the three types of tricyclic dimer crystal, indicating a disordered sequence of 1 and 2 in the monomer crystal. The resulted dimers have a highly strained [2.2]paracyclophane unit, which is quite different from the topochemical photoproduct obtained from 1 or 2 alone.
Synthesis and Crystal Structure of [(CH3)4N]6[H3Biw18O60
Authors: Ozawa Yoshiki , Sasaki Yukiyoshi
Published: July 2006

A novel heteropolytungstate salt [(CH3)4N]6[H3BiW18O60] is prepared and its crystal structure is determined : monoclinic, P21/c, a=13.986(7) Å, b=15,134(2), c=23.250(8), β=115.32(3)°, Z=2. The anion has the same framework as that found in 18-tungstoarsenate(III)(AsW18O60). The Bi atom is coordinated by three O atoms and is on the apex of BiO3 trigonal pyramid.
New Organic Superconductor, (DMET)2Au(CN)2
Authors: Kikuchi Koichi , Kikuchi Mikio , Namiki Takahisa , Saito Kazuya , Ikemoto Isao , Murata Keizo , Ishiguro Takehiko , Kobayashi Keiji
Published: July 2006

We discovered a new organic superconductor, (DMET)2Au(CN)2, which is a radical salt of an asymmetrical donor. The room-temperature conductivity of this salt was very high (2500 S·cm−1) at ambient pressure. This salt showed a metal-insulator transition at about 25 K at ambient pressure, but it exhibited superconductivity below 0.80 K at 5 kbar.
Selective Olefin Hydroformylation on Carbon-supported Ru and Ru–Co Carbonyl Cluster-derived Catalysts
Authors: Fukuoka Atsushi , Matsuzaka Hiroyuki , Hidai Masanobu , Ichikawa Masaru
Published: July 2006

High activities and selectivities toward normal-alcohols were achieved in the vapor-phase hydroformylation of ethylene and propylene on the carbon-supported Ru–Co bimetallic carbonyl cluster-derived catalysts under an atmospheric pressure.
X-Ray Photoacoustic Effect of Solid Materials
Authors: Masujima Tsutomu , Kawata Hiroshi , Amemiya Yoshiyuki , Kamiya Nobuo , Katsura Tomotaro , Iwamoto Teruzo , Yoshida Hisanobu , Imai Hideo , Ando Masami
Published: July 2006

Heat generation of solid materials on X-ray absorption was found to be detected by microphonic photoacoustic method using strong X-rays from a synchrotron orbital radiation source. The wave form of the X-ray photoacoustic spectroscopic (XPAS) signal was similar to those of UV, visible light PAS. The intensity of photoacoustic signal for white X-ray showed linear dependence on the beam current. The difference in photoacoustic signal of various samples is discussed.
9-Methyl-9-nitro-10-nitromethylene-9,10-dihydroanthracene. The First Isolation of a Proposed Intermediate for the Side-chain Nitration of Arenes under Heterolytic Conditions
Authors: Suzuki Hitomi , Kimura Emiko , Katayama Toshimi , Ogawa Takuji
Published: July 2006

Reaction of 9-methy 1-10-nitromethylanthracene with nitric acid in dichloromethane at low temperatures followed by treatment with DABCO gave 9,10-bis(nitromethy1(anthracene and the title compound. The latter is converted by further action of nitric acid to 9-methy1-10-trinitromethylanthracene, 10-methyl-9-anthrylnitrile oxide, and other oxidation products.
Structures of Scuterivulactone C1 and C2 by Two-Dimensional NMR Spectroscopy. New Clerodane Type Diterpenoids from Scutellaria rivularis WALL.
Authors: Kikuchi Tohru , Tsubono Koji , Kadota Shigetoshi , Kizu Haruhisa , Imoto Yoshitaka , Tomimori Tsuyoshi
Published: July 2006

Two new clerodane type diterpenoid lactones, scuterivulactone C1 and C2, have been isolated from the whole herbs of Scutellaria rivularis WALL. and their structures have been elucidated by means of 2-D NMR spectroscopy including INADEQUATE and 1H–13C long-range COSY.
Formation of Poly(lactide) with Controlled Molecular Weight. Polymerization of Lactide by Aluminum Porphyrin
Authors: Trofimoff Laurence , Aida Takuzo , Inoue Shohei
Published: July 2006

Poly(lactide) with narrow molecular weight distribution was obtained by the ring-opening polymerization of D-lactide with (5,10,15,20-tetraphenylporphinato)aluminum alkoxide as initiator. The polymerization was demonstrated to proceed via the ring-opening of lactide at the acyl-oxygen bond to give (porphinato)aluminum alkoxide as the growing species.
An Acid Dependence of the Photdsubstitution of Tris(1,10-phenanthroline)ruthenium(II). Intermediate with a Monodentate Phenanthroline Ligand
Authors: Tachiyashiki Satoshi , Nagao Noriharu , Mizumachi Kunihiko
Published: July 2006

The quantum yield of the photosubstitution of tris(1,10-phenanthroline )ruthenium(II) increased steeply with the increase in acid (HCl or CF3SO3H) concentration to reach a plateau at the acid concentration higher than 0.1 mol dm−3, indicating the protonation to a reaction intermediate of the complex, probably to a nitrogen atom in the reaction intermediate with a monodentate phenanthroline ligand.
Thermogravimetric Analyzer(TG)-Gas Chromatography(GC)/Mass Spectrometry(MS) and Pyrolytic Studies of 1,6-Bis(2-oxooxazolidin-3-ylcarbonylamino)hexane
Authors: Shimasaki Choichiro , Murai Atsuko , Sakai Yukiko , Tsukurimichi Eiichi
Published: July 2006

1,6-Bis(2-oxooxazolidin-3-ylcarbonylamino)hexane (1) was prepared from 2-oxazolidinone and hexamethylenediisocyanurate using triethylenediamine as a catalyst in benzene. A TG effluent gas is collected in a cold trap and then directly injected into a GC for separation, the MS for unequivocal identification. The 13 effluent compounds from the thermal degradation of 1 were identified.
The Enantioselective Michael Reaction of Tin(II) Enolates
Authors: Yura Takeshi , Iwasawa Nobuharu , Mukaiyama Teruaki
Published: July 2006

The enantioselective Michael addition reaction of tin(II) enolates to various α, β-unsaturated ketones is successfully achieved by employing chiral diamine ligands.
The Catalytic Asymmetric Michael Reaction of Tin(II) Enethiolates
Authors: Yura Takeshi , Iwasawa Nobuharu , Narasaka Koichi , Mukaiyama Teruaki
Published: July 2006

The catalytic asymmetric Michael reaction of tin(II) enethiolates forming 5-oxodithioesters in high yield with moderate to good enantioselectivity is achieved by employing catalytic amounts of stannous triflate and chiral diamine.
Synthesis of New Type Stable Heterotriene. Conjugated Dienic Thioketone
Authors: Karakasa Takayuki , Moriyama Satoshi , Motoki Shinichi
Published: July 2006

2-Phenyl-3-thiobenzoyl-5,6-dihydrobenzo[h]-2H-thiochromene was synthesized in 4 steps from 2-(phenylthio)methylene-1-tetralone. The thione reacted as a heterodiene with norbornene to give the corresponding [4+2]cycloadduct.
Catalytic Reduction of Diphenylacetylene by Zinc over Palladium-Carbon Using Viologens as Electron Mediators
Authors: Shosenji Hideto , Nakano Yasuhiro , Yamada Kimiho
Published: July 2006

Diphenylacetylene was reduced over palladium–carbon in methanol–water mixture in presence of zinc using N,N′-dialkyl-4,4′-bipyridinium ions (viologens) as mediators giving cis-stilbene as the major product and bibenzyl as the minor one. The reaction involved the direct contact of zinc with the catalyst.
Synthesis and Crystal Structure of a Dinuclear Iron Tetracarbonyl Complex Containing a Ligand , η5, η5-C5Me4CH2CH2CH2C5Me4
Authors: Tobita Hiromi , Habazaki Hiroki , Shimoi Mamoru , Ogino Hiroshi
Published: July 2006

A dinuclear iron carbonyl complex with trimethylene-bridged permethylcyclopentadienyl rings as a ligand, [Cp2(3)Fe2(CO)4] (1) and its oligomeric derivative [Cp2(3)Fe2(CO)4]n (2) were Synthesized, where Cp2 represents the ligand, η5, η5-C5Me4CH2CH2CH2C5Me4. The oligomeric mixture 2 was easily converted to monomer 1, and crystal structure of 1 was determined.
Fulgides as Efficient Photochromic Compounds. Role of the Substituent on Furylalkylidene Moiety of Furylfulgides in the Photoreaction
Authors: Yokoyama Yasushi , Goto Takakazu , Inoue Tetsushi , Yokoyama Masato , Kurita Yukio
Published: July 2006

Quantum yields of photoreactions of furylfulgides having Me, Et, n-Pr, or i-Pr on the furylalkylidene moiety were measured. The E–Z isomerization was greatly suppressed and the cyclization was accelerated when the alkyl group (R) became bulkier. When R was i-Pr, no E–Z isomerization was observed and the quantum yield of the colorizing cyclization was 0.62.
Freezing of Equilibrium of 1,2,3-Triazole and 3 (5)-Methylpyrazole by Complex Formation with 1,1-Bis(2,4-dimethylphenyl)but-2-yn-1-ol, and X-Ray Crystal Structure of the Complexes
Authors: Toda Fumio , Tanaka Koichi , Elguero Jose , Stein Zafra , Goldberg Israel
Published: July 2006

From an equilibrium mixture of two tautomers, 1H- and 2H-1,2,3-triazole, the relatively unstable 1H-isomer was isolated in pure state as a 1:1 complex with 1, 1-bis(2,4-dimethylphenyl)but-2-yn-1-ol. The two equilibrating tautomers of almost the same stability, 3- and 5-methyltriazole, were also isolated in pure state as a 1:1:1 complex of these and the host compound.
Design of a New Host Compound, 2,2-Di(p-hydroxyphenyl)propane, and Crystal Structure of Its 1:1 Complex with Methylhydrazine
Authors: Toda Fumio , Tanaka Koichi , Hyoda Tosiharu , Mak Thomas C W
Published: July 2006

A new host compound, 2,2-di(p-hydroxyphenyl)propane, which exhibits high inclusion ability towards phenols, amines, and hydrazines, has been designed. The crystal structure of its 1:1 complex with methylhydrazine comprises centrosymmetric cyclic dimeric units consolidated by O–H···N hydrogen bonding.
Optical Resolution of (±)-Fenfluramine and (±)-Norfenfluramine by Preferential Crystallization
Authors: Coquerel Gérard , Bouaziz Roger , Brienne Marie-Josèphe
Published: July 2006

Five salts of (±)-fenfluramine (F) and three salts of (±)-norfenfluramine (N) have been identified as being conglomerates. Six of these salts could be resolved by preferential crystallization.
Regioselective P–O(2′) Cleavage of Cytidine 2′,3′-Cyclic Monophosphate Catalyzed by α-Cyclodextrin
Authors: Komiyama Makoto
Published: July 2006

Regioselective cleavage (selectivity 98%) of the P–O(2′) bond of cytidine 2′,3′-cyclic monophosphate is carried out at pH 11.08, 20 °C by use of α-cyclodextrin as catalyst. Without α-cyclodextrin, the selectivity is only 47% due to concurrent cleavage of the P–0(3′) bond. The regioselective catalysis is ascribed to the formation of a complex between α-cyclodextrin and the monophosphate.
Lactucaxanthin Accumulation and Stacking in the Thylakoid Membrane of a Chlorella Mutant Strain
Authors: Hashizume Hiroshi , Takayama Mami , Satoh Takeya , Ohashi Kensaku
Published: July 2006

Lactucaxanthin, instead of violaxanthin which is an essential carotenoid for violaxanthin cycle, and zeaxanthin were identified in the extract from a mutant strain of green algae, Chlorella ellipsoidia, by proton NMR spectroscopy. The positive exiton chirality was observed by the CD measurements, suggesting that the stacking with these xanthophylls was of the right handed helical mode in the chlorophyll-deficient thylakoid membrane.
Cobalt (II) Chloride Catalysed Regioselective Cleavage of Oxiranes with Chlorotrimethylsilane
Authors: Iqbal Javed , Khan Mohd Amin
Published: July 2006

Oxiranes can be cleaved regioselectively with chlorotrimethysilane in presence of cobalt(II) chloride to the corresponding O-silylated vicinal chlorohydrins in excellent yields.
Highly Selective Synthesis of Phenanthryl Acetates by Palladium Catalyzed Cyclocarbonylation of Naphthylallyl Acetates
Authors: Iwasaki Masakazu , Matsuzaka Hiroyuki , Hiroe Yoshitaka , Ishii Youichi , Koyasu Yukio , Hidai Masanobu
Published: July 2006

Palladium catalyzed cyclocarbonylation of 3-naphthylallyl acetates selectively affords phenanthryl acetates in good yields.
Boron Trifluoride-Assisted Ziegler–Zeiser Reaction of Perfluoroalkyllithiums, An Efficient Synthesis of Perfluoroalkylated Heterocycles
Authors: Uno Hidemitsu , Okada Shin-ichiro , Shiraishi Yasukazu , Shimokawa Kazuhiro , Suzuki Hitomi
Published: July 2006

Quinoline, isoquinoline, quinaldine, phthalazine, and quinoxaline are all found to react smoothly with perfluoroalkyllithiums in the presence of BF3·OEt2, giving the corresponding perfluoroalkyl addition and/or substitution products in good yields. Perfluoroalkylation occurs at the carbon atom next to the nitrogen.
p-Bis(diphenylhydrosilyl)benzene. A Useful Reagent for the Deoxygenation of Alcohols via Acetates
Authors: Sano Hiroshi , Takeda Toshimitsu , Migita Toshihiko
Published: July 2006

Acetates which were derived from primary, secondary, and tertiary alcohols were deoxygenated to the corresponding hydrocarbons in high yield by p-bis(diphenylhydrosilyl)benzene under homolytic conditions.
A Solid-State Amperometric Oxygen Sensor Using NAFION Membrane Operative at Room Temperature
Authors: Kuwata Shigeki , Miura Norio , Yamazoe Noboru
Published: July 2006

New type amperometric oxygen sensors using a NAFION membrane were investigated for monitoring oxygen partial pressure at room temperature. The sensor element finally constructed had a structure in which an electrochemical cell was combined with a hydrogen-generation system and a gas-diffusion layer. Its sensing current under the short-circuit condition was found to vary linearly with the oxygen partial pressure. The 90% response time was about 3 min at 25 °C.
The Intramolecular Interaction in the Excited State of 1-Pyrenylmethyl 9-Anthracenecarboxylate
Authors: Iwamura Michiko , Takuma Keiichi , Koga Noboru , Iwamura Hiizu
Published: July 2006

1-Pyrenylmethyl 9-anthracenecarboxylate exhibits an intramolecular exciplex emission. The electron transfer from the pyrene to the anthracenecarboxylate chromophore has been shown by the effects of solvent and temperature on the fluorescence spectra to drive the formation of the exciplex in spite of the unfavorable s-cis conformation of the carboxylate C–O bond.
cis–trans Reversible Photoisomerization of an Amphiphilic Azobenzene Derivative in Its Pure LB Film Prepared as Polyion Complexes with Polyallylamine
Authors: Nishiyama Katsuhiko , Fujihira Masamichi
Published: July 2006

By using polyallylamine (PAA) for the aqueous subphase, the pure LB films of an azobenzene derivative with a long alkyl-chain showed reversible cis–trans photoisomerization due to the relatively large cross section of the molecule determined by the surface density of the ammonium cations of protonated PAA.
Highly Ion-selective and Super Ion-conductive Solid Electrolyte Thin Films of AgCl Supported in a Porous Glass
Authors: Ichikawa Atsushi , Komiyama Hiroshi
Published: July 2006

A solid electrolyte thin film of AgCl was prepared in a porous silica plate by supplying silver nitrate and sodium chloride aqueous solutions to the opposite faces of the porous plate. The film showed an extremely selective conductivity of silver ion, greater than that in AgCl crystal by seven orders of magnitude.
Substitution Reaction of Ketene Dithioacetals with Carbon Electrophiles by the Promotion of Trityl Chloride-Tin(II) Chloride or Trimethylsilyl Chloride-Tin(II) Chloride Catalyst System
Authors: Mukaiyama Teruaki , Sugumi Hiroyuki , Uchiro Hiromi , Kobayashi Shu
Published: July 2006

In the presence of catalytic amounts of trityl chloride or trimethylsilyl chloride and tin(II) chloride, ketene dithioacetals smoothly react with allyl methyl ethers or α,β-unsaturated orthoesters to afford the corresponding allyl or alkoxycarbonylethyl substituted ketene dithioacetals in good yields.
Preparation of Titania-Supported V–Mo–O Oxide as Highly Active Catalysts for the Simultaneous Removal of SO2 and NO from Exhausts
Authors: Teraoka Yasutake , Yamashita Akihiro , Yamazoe Noboru
Published: July 2006

The titania supported V–Mo–O prepared from VOCl3 and Mo(CO)6 was found to be very active for the simultaneous removal of SO2 and NO. It was shown that the V–Mo–O oxide was supported as an amorphous phase and formed a surface compound similar to vanadium oxysulfate at a steady working state.
Rapid Solidification of (2-Hydroxyethyl)trimethylammonium Silicate
Authors: Hasegawa Isao , Sakka Sumio
Published: July 2006

A large amount of solids of (2-hydroxyethyl)trimethylammonium silicate, whose silicate skeleton has the double four-membered ring structure, was abruptly separated out from the mixed solution of (2-hydroxyethyl)trimethylammonium hydroxide aqueous solution and tetraethoxysilane after a few hours of stirring.
A Ring Expansion of Cyclic Ketones to α-Phenylthio Ketones via Lewis Acid Mediated Denitration
Authors: Kim Sunggak , Park Jung Ho
Published: July 2006

The adducts of cyclic ketones with the lithium derivative of (phenylthio)nitromethane are readily rearranged to the ring expanded α-phenylthio ketones via aluminum chloride mediated denitration.
Interception of 1,4-Radical Cations Derived from a Cage Ketone with Molecular Oxygen
Authors: Ikeda Hiroshi , Yamashita Yoshiro , Kabuto Chizuko , Miyashi Tsutomu
Published: July 2006

1,4-Radical cations, produced from a cage ketone containing a cyclobutane ring by a reaction with an aminium salt or photochemical reaction of an electron donor–acceptor complex with TCNE, were intercepted by molecular oxygen to give novel oxygenated products.
Crystal Structural Study on 2:1 Complexes of Equatorial Isomers of 3,5-Dimethylcyclohexanone and 3,5-Dimethylcyclohexanol with 1,1,6,6-Tetraphenylhexa-2,4-diyne-1,6-diol
Authors: Toda Fumio , Tanaka Koichi , Kai Akihiro , Tanaka Naoki , Tsugiyama Yuko , Hamada Kensaku , Fujiwara Takaji
Published: July 2006

Selective inclusion of the diequatorial isomer of 3,5-dimethylcyclohexanone and the triequatorial isomer of 3,5-dimethylcyclohexanol by 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol was observed. The crystal structure of these complexes was studied.
Molecular Structure of Tris(acetylacetonato)technetium(III)
Authors: Hashimoto Kazuyuki , Kabuto Chizuko , Omori Takashi , Yoshihara Kenji
Published: July 2006

The molecular structure of tris(acetylacetonato)technetium(III) was determined by means of the single crystal X-ray diffraction method. The complex has a typical octahedral coordination and the average ∠O–Tc–O is 90.2°. The average Tc–O distance is 2.025 Å.
Sonochemical Activation of Manganese Dioxide
Authors: Kimura Takahide , Fujita Mitsue , Ando Takashi
Published: July 2006

Ultrasonic irradiation accelerated the oxidation of alcohols to carbonyl compounds with 99% crystalline manganese dioxide. The preparation of sonochemically activated manganese dioxide was developed.
A Regioselective Synthesis of 2,5-Di(methylsulfonyl)phenol
Authors: Ono Mitsunori , Nakamura Yoshisada , Sato Shingo , Itoh Isamu
Published: July 2006

A regioselective and a practical synthesis of 2,5-di(methylsufonyl)phenol is described on the basis of the reactivity analysis of 2,4-dichloro-methylsulfonylbenzene by use of the HSAB principle.
Synthesis of Callicarpone, a Fish-killing Diterpene
Authors: Matsumoto Takashi , Imai Sachihiko , Mimura Kazuyoshi , Aiba Keizo
Published: July 2006

Callicarpone, a fish-killing diterpene, has been synthesized from (+)-11-acetoxy-12-benzoyloxy-8,11,13-abietatrien-7-one via an intermediate, 11,11-ethylenedioxy-9βH-abieta-13(15)-en-12-one.