bluuebunny/crossref_metadata_2025 huggingface dataset:
Hydrolysis of p-Nitrophenyl Picolinate by N-Aminimides Having Metal Binding Site and Hydroxyl Group in the Presence of Zinc(II) Ion
Authors: Kuwamura Tsunehiko , Yano Yumihiko , Inokuma Seiichi , Takenouchi Yoshichika , Tokue Hisae
Published: July 2006

It was found that N-aminimides possessing a metal binding site and a hydroxyl group facilitate transesterification of p-nitrophenyl picolinate(PNPP) to the hydroxyl group in the presence of Zn2+ in aqueous solution.
A Novel Oxidative Ring-Opening of Furans in a (Br)+-Mediated Electrolysis
Authors: Torii Sigeru , Tanaka Hideo , Tsutsui Yuichi , Ohshima Toshiyuki , Yamashita Shiro
Published: July 2006

A novel oxidative ring-opening of 2-substituted furans into methyl 4-substituted (E)-4,4-dimethoxy-2-butenoates has been performed by electrolysis in an NH4Br–Et4NClO4–MeOH–(Ptelectrodes) system.
New Fluorescence from Molecular Aggregates of 10-(1-Pyrenyl)decanoic Acid
Authors: Itaya Akira , Kawamura Tsuneo , Masuhara Hiroshi , Taniguchi Yoshio , Mitsuya Munehisa , Uraki Hisashi , Kano Koji , Hashimoto Shizunobu
Published: July 2006

In addition to the normal monomer and excimer fluorescence, vacuum-deposited, cast and their laser-irradiated films of 10–(1-pyrenyl)decanoic acid showed three kinds of fluorescence bands. Similar new fluorescence bands were also observed in its aqueous solution. These emissions were due to meta-stable aggregates of pyrenyl chromophores whose structures were ascribed to molecular interactions operating during the processes of film preparation.
The Synergistic Extraction of Alkaline Earth Metals with 4-Benzoyl-3-methyl-1-phenyl-5-pyrazolone and Bis(diphenylphosphinyl)methane
Authors: Umetani Shigeo , Kihara Sorin , Matsui Masakazu
Published: July 2006

The bidentate neutral ligand, bis(diphenylphosphinyl)methane, was synthesized and applied to the synergistic extraction of alkaline earth metals into benzene with 4-benzoyl-3-methyl-1-phenyl-5-pyrazolone. This bidentate ligand was found to be much more powerful than the monodentate neutral ligand such as trioctylphosphine oxide.
Regioselective AlPO4–Al2O3 Promoted Ring-Opening of 2,3-Epoxy Esters
Authors: Riego Juan , Costa Antonio , Saa José Manuel
Published: July 2006

Synthetic AlPO4–Al2O3 promotes regioselective ring-opening of 2,3-epoxy esters by some oxygen and sulphur nucleophiles. Ritter type ring-opening with acetonitrile allowed the regioselective introduction of the acetamido group.
Preparation of Fine Fe–Ni Alloy Particles Dispersed in Silica
Authors: Harada Mutsurai , Ono Kazutaka , Tsuiki Hideyasu , Ueno Akifumi , Mizushima Takanori , Udagawa Yasuo
Published: July 2006

Fine Fe–Ni alloy particles dispersed in silica were prepared by hydrolysis of a mixed solution of ethyl silicate and iron and nickel nitrates dissolved in ethylene glycol, the size of the alloy particles being controlled in an even level.
A Convenient Synthesis of 5-Aryltropolones via Novel Benzidine Type Rearrangement of 2-(2-Arylhydrazino)tropones
Authors: Nozoe Tetsuo , Takase Kahei , Saito Hiroaki , Yamamoto Hiroshi , Imafuku Kimiaki
Published: July 2006

Treatment of a wide variety of 2-(2-arylhydrazino)tropones with ethanolic acid at 50–80 °C readily gave the benzidine type rearrangement products, i.e. 2-amino-5-(4-aminoaryl)tropones, which in turn were conveniently led to the corresponding 5-aryltropolones that can be utilized for synthesizing B-ring-open analogues of colchicine.
Selective Piezodialysis by Crown Ether Mosaic Membrane
Authors: Hayashita Takashi , Kojima Kaoru , Igawa Manabu , Takagi Makoto
Published: July 2006

Piezodialysis behavior of mosaic membrane containing dibenzo-18-crown-6 structure was investigated. Depending on the ion exchange selectivity and the difference of hydration degree, selective piezodialysis behavior for alkali metal ions was obtained.
Does an Oxygen Function Stabilize the Sulfonyl Carbanion? Metalation of 1,3-Oxathiane 3,3-Dioxides
Authors: Fuji Kaoru , Usami Yoshihide , Sumi Kenzo , Ueda Masaru , Kajiwara Kanji
Published: July 2006

1,3-Oxathiane 3,3-dioxides were lithiated not at C-2 but at C-4 preferentially, which revealed that the oxygen function destabilizes the sulfonyl carbanion in this ring system.
EXAFS Measurements under High Pressure Conditions Using a Combination of a Diamond Anvil Cell and Synchrotron Radiation
Authors: Sueno Shigeho , Nakai Izumi , Imafuku Masayuki , Morikawa Hideki , Kimata Mitsuyoshiv , Ohsumi Kazumasa , Nomura Masaharu , Shimomura Osamu
Published: July 2006

EXAFS spectra for Fe, Co, Ni K-edges were successfully measured under high pressure conditions using a combination of a set of normal 1/8 carat diamond anvils, synchrotron radiation and a scintillation counter. A newly developed motor controlled goniometer stage was used for adjusting the position of a miniature diamond anvil cell. On the measurement of Cr and Mn spectra, specially designed thinner diamond anvil was necessary. EXAFS analysis of bis(dimethylglyoximato)nickel(II) at pressures from 1 atm to 5.6 GPa was made.
Bis(phthalocyaninato)lanthanoid(III)-catalyzed Photoreduction of Methylviologen
Authors: Kasuga Kuninobu , Atarashi Hiroshi
Published: July 2006

The title complex catalyzes a photoreduction of methylviologen in methanol upon irradiation at λ >440 nm. The catalytic reaction is affected by ionic radius of the lanthanoid(III) ion of the complex.
An Example of In Vivo Analysis by L-Band ESR Technique Using a Loop-Gap Resonator
Authors: Ogata Tateaki , Ono Mitsuhiro , Fujisawa Tadashi , Yoshida Ekuo , Kamada Hitoshi
Published: July 2006

An absorption behavior of TEMPOL radical in celery has been investigated as an example of in vivo analysis by L-band ESR technique using a loop-gap resonator. TEMPOL radical absorbed was found to be diluted in a stalk of celery and disappeare finally at leaves according to the first order reaction.
Trichloro-(trans-2,4-pentadienyl)stannane as a Less Electron-rich Diene and Its Application to Tandem Michael/Diels–Alder Reaction. Formal Total Synthesis of 11-Deoxydaunomycinone
Authors: Naruta Yoshinori , Nishigaichi Yutaka , Maruyama Kazuhiro
Published: July 2006

Trichloro-(trans-2,4-pentadienyl)stannane effectively reacted with an acryloylnaphthoquinone to afford tandem Michael/Diels–Alder adduct in excellent yield. The obtained tetracyclic quinone was converted to 11-deoxydaunomycinone precursor.
Effects of Oxygen on Cyclic Voltammetry of Olefins. A Diagnostic Tool for Elucidating the Reactivity of Olefin Radical Cations with Molecular Oxygen
Authors: Tsuchiya Masahiro , Akaba Ryoichi , Aihara Shin , Sakuragi Hirochika , Tokumaru Katsumi
Published: July 2006

The oxidation currents of olefins were measured under cyclic voltammetry conditions in the absence and presence of oxygen. Under oxygen the currents decreased to different extents depending on the structure of olefins. The mechanism of the oxygen effect are discussed in connection with elucidation of the reactivity of olefin radical cations with molecular oxygen.
Sorption and Desorption Behaviors of Hydrogen over Very Small Palladium Particles in Perchloric Acid
Authors: Takasu Yoshio , Enami Eiji , Matsuda Yoshiharu
Published: July 2006

The saturated amount of adsorbed hydrogen over well defined very small palladium particles has firstly been determined by a cyclic voltammetry in an aqueous solution of HClO4. The amount of absorbed hydrogen into them was also measured. The sorption and desorption behaviors over them were similar to those over palladium atoms deposited on a gold plate.
Resolution of 4-Hydroxy-2-cyclopentenone Derivatives by HPLC on Cellulose Triphenylcarbamate Derivatives
Authors: Okamoto Yoshio , Aburatani Ryo , Kawashima Mitsunobu , Hatada Koichi , Okamura Noriaki
Published: July 2006

Trialkylsilyl ethers of 4-hydroxy-2-cyclopentenone, which are the key compounds for the syntheses of prostaglandins, were completely resolved on chiral HPLC columns packed with cellulose triphenylcarbamate derivatives.
Synthesis and Absolute Configuration of (+)-Phrymarolin I, a Lignan
Authors: Ishibashi Fumito , Taniguchi Eiji
Published: July 2006

(+)-Phrymarolin I was synthesized from (S)-(+)-β-vinyl-γ-butyrolactone, and the absolute configuration of the natural product was established as (1S,2S,5R,6S).
Photochemical Conversion of Disilanyliron(II) Complexes to Monosilyliron(II) Complexes
Authors: Tobita Hiromi , Ueno Keiji , Ogino Hiroshi
Published: July 2006

Photolysis of a C6D6 solution of (η5-C5H5)Fe(CO)2SiMe2SiMeR2 (Fp-SiMe2SiMeR2; R=Me, Et) results in the formation of monosilyl-Fp derivatives with the scrambling of alkyl groups. Possible reaction pathways involving silyleneiron intermediates are discussed.
Octamethyltetrasila[2.2]paracyclophane. Cyclophanes Bridged by Polysilanes
Authors: Sakurai Hideki , Hoshi Satoshi , Kamiya Akihiko , Hosomi Akira , Kabuto Chizuko
Published: July 2006

1,1,2,2,9,9,10,10-Octamethyl-1,2,9,10-tetrasila[2.2]paracyclophane, the first [2.2]paracyclophane bridged by heteroatoms, has been prepared. UV, IR, and 1H- 13C- and 29Si-NMR spectral together with X-ray crystallographic data are recorded. The compound displays a strong σπ mixing between Si–Si bonds and aromatic rings as evidenced by a large red shift in UV spectra.
Asymmetric Sulfenylation of Tin(II) Enolates of Ketones and 3-Acyl-2-oxazolidones. Application to the Synthesis of Optically Active Epoxides
Authors: Yura Takeshi , Iwasawa Nobuharu , Clark Richard , Mukaiyama Teruaki
Published: July 2006

In the presence of chiral diamines, the reaction between tin(II) enolates of ketones or 3-acyl-2-oxazolidones and thiosulfonates proceeds smoothly to give the corresponding β-keto sulfides with high enantioselectivity. Further, optically active epoxides are prepared from these β-keto sulfides.
RING OPENING AND ENLARGEMENT OF CYCLOPROPYL TRIMETHYLSILYL KETONES BY ACIDS
Authors: Nakajima Tadashi , Miyaji Hiroyuki , Segi Masahito , Suga Sohei
Published: July 2006

The reaction of a series of cyclopropyl trimethylsilyl ketones with acids proceeds under milder conditions compared to that of their carbon analogs to give either the ring opening products, 3-chloropropyl trimethylsilyl ketones, or the ring enlargement products, 2-trimethylsilyl-4,5-dihydrofuran derivatives.
The Crossed Claisen Ester Condensation Mediated by Titanium(IV) Bistriflate
Authors: Tanabe Yoo , Mukaiyama Teruaki
Published: July 2006

The crossed Claisen ester condensation between methoxymethyl ester and methyl ester promoted by the combined use of titanium(IV) bistriflate and tertiary amine has been established.
Extremely Facile and Stereoselective Preparation of Allylstannanes with Use of Ultrasound
Authors: Naruta Yoshinori , Nishigaichi Yutaka , Maruyama Kazuhiro
Published: July 2006

Various allylstannanes are conveniently prepared in quantitative yields by means of ultrasound-promoted Barbier-type reaction from chlorotributylstannane and allyl halides in a stereoselective manner.
Binding Sites of Carbohydrate Moieties toward Lignin in “Lignin–Carbohydrate Complex” from Pinus densiflora Wood
Authors: Watanabe Takashi , Kaizu Sumiko , Koshijima Tetsuo
Published: July 2006

Partially enzyme-degraded lignin–carbohydrate complex (LCC) was subjected to acetylation, followed by oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ), which is comfirmed to decompose α - and conjugated γ-ether to release the corresponding alcohol. Methylation analysis of the liberated sugar acetates showed that glucomannan preferably binds to lignin at C-6 position of mannose and glucose residues and that arabinoglucuronoxylan at C-2 and C-3 position of xylose.
Crystal Structure of a 1:1:1 Molecular Complex of (R)-(+)-2,2′-Dihydroxy-1,1′-binaphthyl, N,N,N′,N′-Tetra(2-butyl)terephthalamide, and Methanol
Authors: Toda Fumio , Tagami Yasunori , Quan Hao , Hai-fu Fan , Mak Thomas C W
Published: July 2006

X-Ray analysis of the title complex has shown that the three molecular components are linked by hydrogen bonds to form helical chains parallel to the a axis. The (R)-(+)-2,2′-dihydroxy-1,1′-binaphthyl molecule adopts a transoid conformation with a torsion angle of −95(1)° about the C–C bond joining the aromatic rings.
Electrolytic N-Alkylation of Amines with Alcohols
Authors: Ohtani Bunsho , Nakagawa Koji , Nishimoto Sei-ichi , Kagiya Tsutomu
Published: July 2006

Electrolysis of the alcohol solution of amines in a one-chamber cell resulted in N-alkylation of the amines with sufficient current efficiencies. Platinum black particles suspended in the reaction mixture enhanced the efficiency due to their catalytic role for hydrogenation of a Schiff base intermediate.
X-Ray Photoelectron Diffraction (XPED) Studies of Platinum on Titanium Dioxide (110) Surface
Authors: Tamura Koji , Kudo Masahiro , Owari Masanori , Nihei Yoshimasa
Published: July 2006

X-Ray photoelectron diffraction patterns from platinum atoms deposited on TiO2 (110) surface were measured, and the structural analysis was made by means of the single scattering calculation. It is found that the structural model of platinum particles based on the (111) surface of fee crystal explains the experimental results very well.
Partial Synthesis of Leader Sequence of Phage f1 Coat Protein mRNA
Authors: Hirao Ichiro , Ishikawa Masahide , Miura Kin-ichiro
Published: July 2006

Tetra to undecaribonucleotides of the leader sequence in messenger RNA(mRNA) of f1 coat protein were synthesized on a polystyrene solid support through simple phosphotriester approach.
Formation and Deposition of Monolayers of Amphiphilic β-Cyclodextrin Derivatives
Authors: Kawabata Yasujiro , Matsumoto Mutsuyoshi , Tanaka Motoo , Takahashi Hisao , Irinatsu Yuichi , Tamura Shoji , Tagaki Waichiro , Nakahara Hiroo , Fukuda Kiyoshige
Published: July 2006

Stable condensed monolayers of four different amphiphilic derivatives of β-cyclodextrin were formed on a water subphase. The base of the cylindrical cyclodextrin residue was found to be parallel to the water surface. Langmuir–Blodgett films were obtained for three derivatives.
Production of Synthesis Gas with Various Compositions of H2, CO, and CO2 from Methanol and Water on a Ni–K/Al2O3 Catalyst
Authors: Mizuno Koichi , Yoshikawa Kuniaki , Wakejima Naohisa , Takeuchi Yoshimitsu , Watanabe Akira
Published: July 2006

Mixtures of H2, CO, and CO2 were produced over a Ni–K/Al2O3 catalyst from methanol and water. The composition of the mixtures, in particular the H2/CO ratio, was extensively varied by changing reaction conditions such as starting ratio of methanol/water.
Total Syntheses of Citreoviridinol and Neocitreoviridinol
Authors: Nishiyama Shigeru , Toshima Hiroaki , Yamamura Shosuke
Published: July 2006

Both citreoviridinol and neocitreoviridinol, metabolites of Penicillium citreo-viride B., have been synthesized from the known synthetic intermediate of citreoviridin, in regio- and stereoselective manner.
Oxidative Coupling of Methane over Lithium-Promoted Zinc Oxide Catalyst
Authors: Matsuura Ikuya , Utsumi Yasuhide , Nakai Miyuki , Doi Takao
Published: July 2006

Alkali doped ZnO samples were examined as catalysts for the conversion of methane to ethylene and ethane. Among the catalysts tested, 12.5 mol% Li-promoted zinc oxide was the most active and selective for the formation of C2-hydrocarbons. The highest yield of C2-compounds was 24.8% and the fraction of ethylene in C2-compounds was over 80% .
Mechanistic Insight into Immobilization and Release of Active Radical Species on a Novel Plasma-Driven Ultrathin Film
Authors: Kuzuya Masayuki , Nakanishi Masaharu , Nakai Sachihiko
Published: July 2006

Mechanism for immobilizing an active radical species and its slow release on a novel plasma-driven ultrathin film was proposed with the aid of molecular orbital calculations, which involves the existence of non-optimized weakened σ-bonds in such a ultrathin film and the propensity of their facile bond-cleavages.
The Direct Electrochemical Oxidation of H2O2 Adsorbed on TiO2 Fine Particles Suspended in Water
Authors: Fujihira Masamichi , Muraki Hiroji
Published: July 2006

The H2O2 molecules deliberately adsorbed on the surfaces of TiO2 fine particles suspended in an alkaline solution can be oxidized electrochemically on a rotating gold disk electrode.
INTERACTION BETWEEN ALUMINIUM COPPER(I) CHLORIDE AND 1,3-DIPHENYLPROPANE
Authors: Hirai Hidefumi , Kanaka Keiichi , Komiyama Makoto
Published: July 2006

A strong charge-transfer band due to the interaction between aluminium copper(I) chloride and 1,3-diphenylpropane is observed in the 360–500 nm region. The band, which is composed of two portions with absorption maxima, respectively, at 422 and 460 nm, is attributed to chelate-type interactions of the two aromatic rings of 1,3-diphenylpropane with aluminium copper(I) chloride.
Matrix Isolation of Silenes and Their Ultraviolet Absorptions
Authors: Sekiguchi Akira , Ando Wataru
Published: July 2006

Various silenes were isolated in 3-methylpentane matrix at 77 K by photolysis of the corresponding silyl diazo compounds and their ultraviolet spectra were measured.
A New Synthesis of Fused Heterocyclic and Carbocyclic Compounds via the Reaction of the Vinylphosphonate with Imide and Ketone Enolate Anions
Authors: Minami Toru , Watanabe Kazushi , Hirakawa Kazunari
Published: July 2006

The reaction of diethyl (α-ethoxycarbonylvinyl)phosphonate with various imide and ketone enolate anions gave functionalized heterocyclic and carbocyclic, and spirocarbocyclic compounds containing the phosphorus residue in good yields.
Cobalt-mediated Reduction of C=N Bond. Synthesis of Methyl N-p-Toluenesulfonyl-1-phenylglycinate Catalyzed by Bis (dioximato)cobalt–Quinine Complexes
Authors: Kobayashi Kenji , Okamoto Tadashi , Oida Tatsuo , Tanimoto Shigeo
Published: July 2006

Reduction of C=N bond mediated by cobalt complxes was facilitated by the electron withdrawing substituents on the substrate. Catalytic hydrogenation of methyl N-p-toluenesulfonyl-1-imino-1-phenylacetate in the presence of quininiun salt afforded the corresponding N-tosyl amino ester in good yields.
PbBr2/Al-Promoted Reductive Addition of 1,1,1-Trichloro-2,2,2-trifluoroethane (Flon) to Aldehydes
Authors: Tanaka Hideo , Yamashita Shiro , Katayama Yasumi , Torii Sigeru
Published: July 2006

Introduction of CF3CCl2 unit into aldehydes with CF3CCl3 has been performed successfully by the action of catalytic PbBr2 and Al foils in DMF.
UNIQUE REACTION CHARACTERISTICS OF Rh CATALYSTS FOR THE CO HYDROGENATION BY MEANS OF PSRA
Authors: Mori Yoshihiko , Mori Toshiaki , Takahashi Naoki , Miyamoto Akira , Hattori Tadashi , Murakami Yuichi
Published: July 2006

By using PSRA, the rate constant for the formation of surface carbon species, kCO, and that for its hydrogenation, kCHx were determined from dynamics of adsorbed CO and produced CH4 in the CO hydrogenation on supported Rh catalysts. It was found that there was not much difference between these two rate constants, while kCHx was extremely larger than kCO on the other group VIII metal catalysts.
Synthesis of a New Chiral Pyrrolidine Ligand Bearing Two Different Types of Phosphino Groups and Their Effects on the Asymmetric Hydrogenation of Ketopantolactone
Authors: Morimoto Toshiaki , Takahashi Hisashi , Fujii Katsuyasu , Chiba Mitsuo , Achiwa Kazuo
Published: July 2006

The respective functions of the two phosphino groups of the pyrrolidinebisphosphine ligands in the asymmetric hydrogenation of ketopantolactone were elucidated.
Metal-Oxide Interaction in Alumina-Promoted Rh/SiO2 Catalyst. Effect of H2 Treatment on H2 Chemisorption and Cyclohexane Hydrogenolysis
Authors: Hu Zhicheng , Maeda Akira , Kunimori Kimio , Uchijima Toshio
Published: July 2006

An Al2O3-promoted Rh catalyst, containing Al2O3 deposited onto a Rh/SiO2 catalyst, exhibited an SMSI behavior: a significant suppression of both the H2 chemisorption capacity and the cyclohexane hydrogenolysis activity by high-temperature reduction and their recovery by O2 treatment at 673 K followed by low-temperature reduction.
SIMULTANEOUS PARTICIPATION OF SEVERAL EXCITED STATES IN PHOTOCHEMICAL METHOXYLATION AND METHYLATION OF 3-PYRIDINECARBOXAMIDE IN METHANOL
Authors: Sugimori Akira , Itoh Hiroshi
Published: July 2006

The UV-irradiation of 3-pyridinecarboxamide in methanol in the presence of sulfuric acid brings about methoxylation (ionic reaction) at the 2- and 6-position and methylation (radical reaction) at the 4- and 6-position. The effects of quenchers indicate that two methylation products originate from one excited triplet state which is quenched by energy transfer mechanism and that two methoxylation products originate from two different excited singlet states which are quenched by electron transfer mechanism.
An Efficient Synthesis of 9-Oxaisotwist-8-en-2-ones. Synthesis of Deoxysilydianin Methyl Ether
Authors: Shizuri Yoshikazu , Shigemori Hideyuki , Okuno Yoshishige , Yamamura Shosuke
Published: July 2006

Deoxysilydianin methyl ether has been readily synthesized by means of anodic oxidation of the corresponding phenol as a key step, indicating a general method for synthesis of 9-oxaisotwist-8-en-2-ones in high yields.
Photosensitive 1:1 Adduct between Bis(1,2-diphenyl-1,2-ethylenedithiolato)nickel(0) and Quadricyclane
Authors: Kajitani Masatsugu , Kohara Midori , Kitayama Tomoko , Asano Yoshihiko , Sugimori Akira
Published: July 2006

Bis(1,2-diphenyl-1,2-ethylenedithiolato)nickel(0) (1a) reacts with quadricyclane (Q) to give a 1:1 adduct which has the same structure as that of the adduct between 1a and norbornadiene (NBD). Q reacts with 1a much faster than NBD. The adduct is thermally stable but photosensitive to dissociate into 1a and NBD.
A CONVENIENT METHOD FOR GENERATION OF TIN(II) THIOESTER ENOLATE AND ITS REACTION WITH ALDEHYDE
Authors: Mukaiyama Teruaki , Yamasaki Noritsugu , Stevens Rodney W , Murakami Masahiro
Published: July 2006

Tin(II) enolates of thioesters are conveniently generated by the addition of stannous thiolates to ketenes. The tin(II) enolates thus formed react with aldehydes to afford the corresponding β-hydroxythioesters in a syn-selective manner. And this method is applied to an enantioselective formation of β-hydroxythioesters by the use of a chiral diamine as ligand.
TRITYL PERCHLORATE CATALYZED TANDEM MICHAEL–ALDOL REACTION. A FACILE METHOD FOR THE STEREOSELECTIVE SYNTHESES OF γ-ACYL SUBSTITUTED δ-HYDROXY KETONE DERIVATIVES
Authors: Kobayashi Shu , Mukaiyama Teruaki
Published: July 2006

In the presence of a catalytic amount of trityl perchlorate, the intermediate adducts, produced in situ by the conjugate addition of silyl enol ethers with α,β-unsaturated ketones, react with aldehydes to give the corresponding γ-acyl substituted δ-hydroxy ketone derivatives stereoselectively in high yields. The ketones thus obtained are easily converted to tetrahydropyran derivatives.
SELECTIVE ABSORPTION OF ETHYLENE BY TOLUENE SOLUTION OF ALUMINIUM SILVER CHLORIDE
Authors: Hirai Hidefumi , Hara Susumu , Komiyama Makoto
Published: July 2006

Toluene solutions of aluminium silver chloride rapidly absorb ethylene from ethylene–nitrogen (0.94:0.06) mixture at 20 °C under 1 atm. The equilibrium molar ratio of absorbed ethylene to the charged silver chloride is 0.65. In contrast, the solutions show no measurable absorption of carbon monoxide under comparable conditions.
PREPARATION OF AMORPHOUS TiO2 FILMS BY THERMOPHORESIS-AIDED CHEMICAL VAPOR DEPOSITION
Authors: Shimogaki Yukihiro , Komiyama Hiroshi
Published: July 2006

TiO2 films of 50–100 μm in thickness were formed on a cooled substrate from a stream containing titanium–tetraisopropoxide (Ti(OC3H7)4, TTIP) at 623 K and atmospheric pressure. The films were amorphous and microporous with a specific surface area of 30–50 m2/g. The growth rate of these films, around 30 nm/s, was much higher than conventional deposition techniques.
THERMAL RACEMIZATION OF CHIRAL ALKYL COBALT COMPLEXES AND ESTIMATION OF Co–C BOND DISSOCIATION ENERGY
Authors: Ohgo Yoshiaki , Orisaku Keiko , Hasegawa Emiko , Takeuchi Seiji
Published: July 2006

Measurement of the thermal racemization rates of alkyl cobalt complexes having chirality only at the carbon coordinated directly to cobalt enabled estimation of the activation parameters of the Co–C bond homolysis and the bond dissociation energies. The effects of substituents of the alkyl moiety and axial bases on the Co–C bond dissociation energy are discussed.
SUBSTITUTION-TYPE 1,2-REARRANGEMENT BY USING ORGANOALUMINUM REAGENTS. SYNTHESIS OF CHIRAL α-ARYL(OR ALKENYL)KETONE ACETALS
Authors: Honda Yutaka , Morita Eitaro , Tsuchihashi Gen-ichi
Published: July 2006

Title compounds were synthesized via novel stereospecific 1,2-rearrangement of an aryl (or alkenyl) group accompanied by introduction of an alkyl or alkynyl group by using organoaluminum reagents.
SYNTHESIS OF 2-PHENYLPHOSPHOLENO[3,4-d]TROPONE 2-OXIDE. A NEW METHOD FOR SYNTHESIS OF 4,5-ANNELATED TROPONES
Authors: Kato Masahiko , Nomura Shigeki , Kobayashi Hisako , Miwa Toshio
Published: July 2006

2-Phenylphospholeno[3,4-d]tropone 2-oxide has been synthesized starting with 3,4-bis(methylene)-7,7-dibromobicyclo[4.1.0]heptane. This has opened a new short synthetic route to 4,5-annelated tropones.
COBALT CARBONYL CATALYZED POLYCARBONYLATION OF POLYHALOGENATED AROMATICS UNDER PHOTOSTIMULATION
Authors: Kashimura Tsugunori , Kudo Kiyoshi , Mori Sadayuki , Sugita Nobuyuki
Published: July 2006

Cobalt carbonyl catalyzed polycarbonylation of much less reactive polychlorobenzenes could be easily achieved under photostimulation in aqueous sodium hydroxide. All these reactions could be performed without any organic solvent(in some cases, ethanol was used as a co-solvent) and any phase transfer catalyst.
NUCLEOPHILIC SUBSTITUTION OF p-DINITROBENZENE WITH SOME CARBANIONS. FORMATION OF p-SUBSTITUTED NITROBENZENES
Authors: Iwasaki Genji , Saeki Seitaro , Hamana Masatomo
Published: July 2006

Treatment of p-dinitrobenzene with active methylene compounds of rather weak acidity in the presence of t-BuOK in liq NH3 at −70 °C leads to nucleophilic substitution of a nitro group, giving p-substituted nitrobenzenes in generally good yields.
SYNTHESIS AND CYCLOPALLADATTON OF A MACROCYCLTC TRIAMINE, 7-METHYL-3,7,11-TRIAZABICYCLO[11,3,1]HEPTADECA-1(17),13,15-TRIENE
Authors: Hiraki Katsuma , Tsutsumida Johji , Fuchita Yoshio
Published: July 2006

A macrocyclic triamine, 7-methyl-3,7,11-triazabicyclo[11,3,1]heptadeca-1(17),13,15-triene was treated with palladium(II) acetate and subsequently with NaClO4·H2O to give [7-methyl-3,7,11-triazabicyclo [11,3,1]heptadeca-1(17),13,15-trienato-C17,N,N′,N″]palladium(II) perchlorate-water(1/1).
THE REACTION OF TRIBUTYLSTANNYLLITHIUM WITH 2-ETHOXY-3-ALKENENITRILES. A NEW METHOD FOR THE PREPARATION OF γ-ETHOXYALLYLSTANNANES AND DIENOL ETHERS
Authors: Takeda Takeshi , Ando Kazuo , Ohshima Hiroyuki , Inoue Masami , Fujiwara Tooru
Published: July 2006

The reaction of 2-ethoxy-3-alkenenitriles with tributylstannyllithium gave the SN2′ product, γ-ethoxyallylstannanes (3), in good yields. When 3 have a trimethylsiloxyl group at δ-position, the corresponding substituted 2-ethoxy-1,3-butadienes were produced by the elimination of trimethylsiloxystannane.
DIASTEREOSELECTIVE REACTION OF CROTYLSILANES WITH ACETALS. IMPORTANCE OF THE ELECTRONIC EFFECT IN ACYCLIC STEREOSELECTION
Authors: Hosomi Akira , Ando Masatomo , Sakurai Hideki
Published: July 2006

Acyclic stereoselection of aromatic acetals in the reaction with crotylsilanes depends upon the geometry of crotylsilanes. It was also disclosed for the first time that the electronic effect plays an important role on controlling the diastereochemistry.
NOVEL PHOTOREARRANGEMENT OF 3-PHENYL-2-PROPENYLGERMANES
Authors: Kobayashi Masanori , Kobayashi Michio
Published: July 2006

3-Phenyl-2-propenylgermanes, R3GeCH2CH=CHPh (R=Me, Et, Pr, Bu, Ph) were found to rearrange to 1-phenyl-2-propenylgermanes, R3GeCH(Ph)CH=CH2 upon irradiation with low pressure mercury lamp in cyclohexane.
THE CRYSTAL AND ELECTRONIC STRUCTURES OF A NEW MOLECULAR CONDUCTOR, (HMTTeF)2[Pt(dmit)2]
Authors: Kobayashi Akiko , Sasaki Yukiyoshi , Kato Reizo , Kobayashi Hayao
Published: July 2006

The crystal structure of (HMTTeF)2[Pt(dmit)2] was determined. The unit cell contains four HMTTeF molecules. They are stacked to make a tetradic column. Tetradic columns link together, making a two-dimensional network by Te…Te short contacts. The Pt(dmit)2 anions are located in the space between two-dimensional HMTTeF tetrad with their molecular plane almost perpendicular to the HMTTeF molecules.
FORMATION OF 1-ARYL-1-BENZOTHIOPHENIUM IONS IN BROMINATION OF o-ARYLTHIOPHENYL-SUBSTITUTED ETHYLENES
Authors: Kitamura Tsugio , Kawasato Hironobu , Kobayashi Shinjiro , Taniguchi Hiroshi
Published: July 2006

Bromination reaction of o-arylthiophenyl-substituted ethylenes gave 1-aryl-1-benzothiophenium ions by intramolecular cyclization in the bromonium intermediates. The substituent and solvent effects are also discussed.
OXYGEN PERMEATION IN THE MEMBRANE OF POLY(OCTYLMETHACRYLATE-co-4-VINYLPYRIDINE)-SALICYLALDEHYDEETHYLENEDIIMINE COBALT COMPLEX
Authors: Nishide Hiroyuki , Kuwahara Masahiro , Ohyanagi Manshi , Funada Yoshitsugu , Kawakami Hiroyoshi , Tsuchida Eishun
Published: July 2006

Oxygen-binding and -permeation in the membrane prepared from the poly(octylmethacrylate-co-4-vinylpyridine) complexed with salicylaldehydeethylenediimine cobalt was studied by spectroscopic and permeability measurements. The cobalt complex in the membrane effectively acted as a fixed carrier on oxygen permeation.
REGIOSELECTIVE ALKYLATION AND THE RAMBERG–BÄCKLUND TYPE REACTION OF α-(p-TOLYLSULFONYL)THIANE S,S-DIOXIDE. A NEW ROUTE TO THE SYNTHESIS OF 3-ALKYL-3-CYCLOPENTENONES
Authors: Matsuyama Haruo , Miyazawa Yasuyuki , Kobayashi Michio
Published: July 2006

A new general olefin synthesis, via regioselective alkylation of α-(p-tolylsulfonyl)thiane S,S-dioxide, 1,4-dioxa-7-p-tolylsulfonyl-8-thiaspiro[4.5]decane 8,8-dioxide, and subsequent Ramberg–Bäcklund type elimination of p-toluenesulfinate and SO2, is here applied to the synthesis of 3-alkyl-3-cyclopentenones.
UNCAPPED ALKYLTHIO SUBSTITUTED TETRATHIAFULVALENES (TTCn-TTF) AND THEIR CHARGE TRANSFER COMPLEXES
Authors: Wu Peiji , Saito Gunzi , Imaeda Kenichi , Shi Zurong , Mori Takehiko , Enoki Toshiaki , Inokuchi Hiroo
Published: July 2006

A series of tetraalkylthio substituted tetrathiafulvalenes (TTCn-TTF) was prepared. The syntheses, molecular and crystal structures, and physical properties of TTCn-TTF reveal marked differences from those of BEDT-TTF. The conformational change of TTC1-TTF molecule on the formation of charge transfer complexes and the mode of the S…S contacts are described in connection with those of BEDT-TTF compounds.
ON THE REACTION OF N-VINYLIMINOPHOSPHORANES. A NOVEL ROUTE TO 1-AZAAZULENE RING SYSTEM UTILIZING AZA-WITTIG REACTION
Authors: Nitta Makoto , Kobayashi Tomoshige
Published: July 2006

N-(1-Phenyl)vinyliminotriphenylphosphorane, conveniently prepared from α-azidostyrene and triphenylphosphine, readily undergoes an annelation reaction with tropone derivatives to result in the formation of 1-azaazulene ring system.
PROTON-ASSISTED CHARGE SEPARATION BETWEEN PORPHYRIN AND QUINONE
Authors: Maruyama Kazuhiro , Furuta Hiroyuki
Published: July 2006

Photo-induced electron transfer reaction between porphyrin and quinone was investigated by means of CIDNP technique in benzene. In the presence of acid, formation of neutral semiquinone radical instead of quinone anion radical was confirmed by using 2,5- and 2,6-dichlorobenzoquinone as electron acceptors.
PHOTO-INDUCED CROSS-COUPLING REACTION BETWEEN PORPHYRIN AND QUINONE
Authors: Maruyama Kazuhiro , Furuta Hiroyuki , Osuka Atsuhiro
Published: July 2006

A novel type of photo-induced cross-coupling reaction was developed in the photoreaction of “phenolic porphyrin” with quinone in benzene solution. Radical coupling mechanism was suggested by means of CIDNP technique.
COBALT CARBONYL-CATALYZED DOUBLE-CARBONYLATION OF o-HALOGENATED BENZOIC ACIDS UNDER PHOTOSTIMULATION
Authors: Kashimura Tsugunori , Kudo Kiyoshi , Mori Sadayuki , Sugita Nobuyuki
Published: July 2006

Cobalt carbonyl-catalyzed double-carbonylation of o-dihalobenzenes and o-halogenated benzoic acids, affording phthalonic acid, was observed in aqueous sodium hydroxide under photostimulation.
L-BAND ESR SPECTROMETER USING A LOOP-GAP RESONATOR FOR IN VIVO ANALYSIS
Authors: Ono Mitsuhiro , Ogata Tateaki , Hsieh Kou-Chang , Suzuki Michiya , Yoshida Ekuo , Kamada Hitoshi
Published: July 2006

An L-band ESR spectrometer using a loop-gap resonator with an electric shield was constructed in order to measure large quantities of wet biological samples at in vivo state. The principal components of the loop-gap resonator and the comparison of the sensitivity between X-band cavity and the loop-gap resonator were described.
CYCLOPROPYLALANINE, AN ANTIFUNGAL AMINO ACID OF THE MUSHROOM AMANITA VIRGINEOIDES BAS
Authors: Ohta Tomihisa , Nakajima Shigeru , Sato Zenji , Aoki Toshio , Hatanaka Shin-ichi , Nozoe Shigeo
Published: July 2006

Cyclopropylalanine, an antifungal amino acid, has been isolated from the mushroom Amanita virgineoides Bas. Its structure has been elucidated as (2S)-2-amino-3-cyclopropylpropionic acid, on the basis of the spectroscopic analysis and its synthesis from L-allylglycine.
CIDEP STUDY OF THE FORMATION OF ARYL-SUBSTITUTED GERMYL RADICALS IN DIRECT PHOTOEJECTION OF THE GERMYL ANIONS
Authors: Mochida Kunio , Wakasa Masanobu , Murai Hisao , I’haya Yasumasa J , Sakaguchi Yoshio , Hayashi Hisaharu
Published: July 2006

Photolysis of aryl-substituted germyl anions was studied by CIDEP at 77 K. The emmision pattern of the spectra detected after pulsed excitation revealed a contribution of the triplet mechanism.
SYNTHESIS AND AMMONIUM CRYPTATE OF DISSYMMETRIC CYLINDRICAL MACROTRICYCLE CONTAINING CROWN ETHER AND CYCLOPHANE UNITS
Authors: Saigo Kazuhiko , Lin Ru-Jang , Kubo Masataka , Youda Akira , Hasegawa Masaki
Published: July 2006

A new type of dissymmetric macrotricyclic cryptand, which contains dibenzo-18-crown-6 and cyclophane sub-units as substrate selective binding sites, was synthesized. The cryptand formed inclusion complex with 4-phenylbutylammonium picrate. Complex formation was ascertained by 1H NMR spectroscopy in a CDCl3/CD3OD (4/1) solution.
REGULATION OF THE AGGREGATED STRUCTURE OF CYANINE DYES IN LANGMUIR–BLODGETT FILMS USING BILAYER-FORMING AMPHIPHILES
Authors: Era Masanao , Hayashi Seiji , Tsutsui Tetsuo , Saito Shogo , Shimomura Masatsugu , Nakashima Naotoshi , Kunitake Toyoki
Published: July 2006

Aqueous cyanine dyes were adsorbed onto the monolayer of dialkylammonium amphiphiles at the air–water interface. The composite monolayer was successfully transferred on a glass substrate by the conventional Langmuir–Blodgett method, and the adsorbed cyanine dyes were shown to assume J-like aggregation.
FACILE SYNTHESIS OF 2-METHYLENE-4-BUTYROLACTONES
Authors: Nokami Junzo , Tamaoka Takashi , Ogawa Hideki , Wakabayashi Shoji
Published: July 2006

2-Methylene-4-butyrolactones were conveniently synthesized by treatment of an aldehyde with 2-carboethoxyallyl(-ic) bromide and metallic tin (and aluminum) in good yields. Protolichesterinic acid was synthesized by employing the method.
TITANIUM-MEDIATED REDUCTION OF NITROBENZENES AND BENZIL WITH DIALKYL TELLURIDE
Authors: Suzuki Hitomi , Hanazaki Yasuaki
Published: July 2006

In the presence of titanium(IV) chloride, nitrobenzenes are easily reduced with dialkyl telluride to give the corresponding amines in good to moderate yields. Benzil is reduced to benzoin which, on a further treatment, is converted to desoxybenzoin.
SYNTHESES AND PROPERTIES OF BINAPHTHO[1,8-de]-1,3-DITHIIN-2-YLIDENE AND ITS SELENIUM ANALOGUE
Authors: Yui Koji , Aso Yoshio , Otsubo Tetsuo , Ogura Fumio
Published: July 2006

With a view to discovering new electron donors for low-dimensionally metallic materials, the title compounds were prepared via the corresponding 1,8-dichalcogen-bridged naphthalenes. Their donor characters were examined by cyclic voltammetry, as compared with those of the reference compounds.
REACTION MECHANISMS FOR ELECTROCHEMICAL CARBON-SKELETON REARRANGEMENT AS CATALYZED BY HYDROPHOBIC VITAMIN B12 IN NONAQUEOUS MEDIA
Authors: Murakami Yukito , Hisaeda Yoshio , Tashiro Takako , Matsuda Yoshihisa
Published: July 2006

Reaction mechanisms for the controlled-potential electrolysis of 2,2-bis(ethoxycarbonyl)-1-bromopropane at −1.0, −1.5, and −2.0 V vs. SCE as catalyzed by a hydrophobic vitamin B12 were clarified. The carbon-skeleton rearrangement was postulated to proceed via formation of anionic intermediates.
ASYMMETRIC INDUCTION IN THE PALLADIUM-CATALYZED SULFONYLATION OF ALLYLIC SULFINATES AND ACETATES WITH CHIRAL PHOSPHINE LIGANDS
Authors: Hiroi Kunio , Makino Kunitaka
Published: July 2006

Treatment of allylic (±)-p-toluenesulfinates with tetrakis(triphenylphosphine)palladium in the presence of chiral phosphine ligands underwent allylic sulfinate-sulfone rearrangements to give the corresponding optically active allylic sulfones in high optical yields. The palladium-catalyzed reactions of readily obtainable allylic acetates with sodium p-toluenesulfinate in the presence of chiral phosphine ligands provided a new entry to optically active allylic sulfones with high enantiomeric excess.
SEMIEMPIRICAL MOLECULAR ORBITAL (MO) CALCULATIONS OF THE EFFECTIVE EXCHANGE INTEGRALS FOR SANDWICH DIMERS OF FREE RADICAL SPECIES. ANTI- AND FERROMAGNETIC SPIN COUPLINGS OF ORGANIC FREE RADICALS
Authors: Yamaguchi Kizashi , Fueno Takayuki , Nakasuji Kazuhiro , Murata Ichiro
Published: July 2006

The effective exchange integrals (Jab) for magnetically coupled organic systems are divided into two different contributions, (i) orbital-overlap and (ii) spin-density-product terms. MO calculations have shown that the former term overweighs the latter in the case of free radical dimers, leading to the negative Jab values, a trend which is compatible with observations.
HIGHLY STEREOSELECTIVE ALDOL-TYPE REACTION OF CHIRAL TIN(II) ENOLATE. FORMAL TOTAL SYNTHESIS OF (±)-THIENAMYCIN
Authors: Iwasawa Nobuharu , Mukaiyama Teruaki
Published: July 2006

Highly efficient internal chiral induction is achieved in the aldol-type reaction of tin(II) enolate generated from 3-amino-substituted butanoylthiazolidine-2-thione. This reaction is successfully applied to the formal total synthesis of (±)-thienamycin.
LIQUID FUEL PRODUCTION FROM ETHANOL FERMENTATION STILLAGE
Authors: Yokoyama Shin-ya , Suzuki Akira , Murakami Masanori , Ogi Tomoko , Koguchi Katsuya
Published: July 2006

Liquid fuel was directly produced from ethanol fermentation stillage. When stillage was treated with sodium carbonate under pressure of nitrogen at 300 °C, oily products separable from an aqueous phase were obtained. The yield of heavy oil having a heating value of 35 MJ/kg attained about 50% and the energy recovery of heavy oil exceeded 75% of starting material.
SURFACE STATE OF AMORPHOUS NICKEL PHOSPHIDE FILMS PREPARED BY RF SPUTTERING
Authors: Tamaki Jun , Imanaka Toshinobu
Published: July 2006

Amorphous nickel phosphide films were prepared by an RF glow discharge sputtering technique. The amorphous nickel phosphide films with various compositions were easily prepared by changing the sputtering atmosphere and below 25 atom%P phosphorus donated electrons to nickel but above 25 atom%P phosphorus accepted electrons from nickel.
CRYSTALLIZATION OF LARGE CRYSTAL SILICALITE IN THE SYSTEM WITHOUT HYDROXIDE ADDITION
Authors: Hayhurst David T , Lee Jeng-cheng
Published: July 2006

Reactant mixtures with salts as the only source of alkali metal were prepared for hydrothermal synthesis of silicalite. Crystals of size well above 100 μm were identified in some experimental runs. A simple relationship between the crystal size and the amount of added salt was established.
CONDUCTING LANGMUIR–BLODGETT FILMS OF 1:2 CHARGE TRANSFER COMPLEX, N-DOCOSYLPYRIDINIUM-(TCNQ)2
Authors: Nakamura Takayoshi , Matsumoto Mutsuyoshi , Takei Fumio , Tanaka Motoo , Sekiguchi Tatsuo , Manda Eiichiro , Kawabata Yasujiro
Published: July 2006

The bulk conductivity, 10−2 S cm−1, in the lateral direction of the Langmuir–Blodgett films has been achieved using the amphiphilic 1:2 charge transfer complex, N-docosylpyridinium-(TCNQ)2, without any doping or further treatments. These films are stable for at least two months in air at room temperature.
DIDECALINO-14-CROWN-4. HIGHLY LITHIUM ION SELECTIVE EXTRACTANT
Authors: Kobiro Kazuya , Matsuoka Toshihiro , Takada Shigeki , Kakiuchi Kiyomi , Tobe Yoshito , Odaira Yoshinobu
Published: July 2006

Didecalino-14-crown-4 has been synthesized and found to have the conspicuous extractability as well as selectivity for lithium ion.
MoO2(acac)2 CATALYZED HETERO DIELS–ALDER REACTION OF BENZYL PROP-1-EN-1-YL ETHER WITH METHACROLEIN
Authors: Yamamoto Yasuo , Suzuki Hiroharu , Moro-Oka Yoshihiko
Published: July 2006

Molybdenyl acetylacetonate, MoO2(acac)2 (acac = CH3COCHCOCH3−), effectively catalyzes hetero Diels–Alder reaction of benzyl prop-1-en-1-yl ether with methacrolein under mild conditions to yield 3,4-dihydro-2-benzyloxy-3,5-dimethyl-2H-pyran.
ASYMMETRIC HYDROGENATION OF N-(α-KETOACYL)-α-AMINO ESTERS
Authors: Tani Kazuhide , Tanigawa Eiji , Tatsuno Yoshitaka , Otsuka Sei
Published: July 2006

Asymmetric hydrogenation of N-(α-ketoacyl)-α-amino esters with Cydiop–rhodium(I) complex catalysts produced optically active N-(α-hydroxyacyl)-α-amino esters in high optical yields, which may be useful as building blocks of depsipeptides. Almost no influence of the chiral center of substrate was observed.
VAPOR-PHASE NITRATION OF BENZENE OVER POLYORGANOSILOXANES BEARING SULFO GROUPS
Authors: Suzuki Sadakatsu , Tohmori Kunihiko , Ono Yoshio
Published: July 2006

Polyorganosiloxanes with sulfo groups have the high catalytic activity for vapor-phase nitration of benzene. The polysiloxane with sulfophenyl groups showed the highest activity. The reaction rate depended greatly on the partial pressures of both benzene and nitrogen dioxide. The nitrobenzene yield of 80% was obtained at 443 K under the partial pressures of benzene and nitrogen dioxide of 20 and 40 kPa, respectively.
PHOTOLYSIS OF CYCLIC ARYLVINYL HALIDES. FORMATION OF 1,2-BENZO-1,3-CYCLOALKADIENYL CATIONS AND THEIR REARRANGEMENTS
Authors: Kitamura Tsugio , Muta Tomonobu , Tahara Toru , Kobayashi Shinjiro , Taniguchi Hiroshi
Published: July 2006

Photolysis of 1,2-benzo-1,3-cycloalkadien-4-yl bromides and 1,2-benzo-,1,3-cycloalkadien-3-yl chlorides showed a remarkable effect of ring size on the rearrangements of the resulting 1,2-benzo-1,3-cycloalkadienyl cations, i.e., 1,2-aryl or alkyl migration across the double bond and 1,2-hydride or methyl migration to the cationic center.
STEREOSELECTIVE SYNTHESES OF STEROID SIDE CHAINS. EFFICIENT SYNTHESES OF (2RS,3RS)-2-METHYL-3-[(1RS)-1,5-DIMETHYLHEXYL]CYCLOPENTANONE AND (2RS)-2-[(1RS)-3-OXOCYCLOHEXYL]PROPANOIC ACID
Authors: Tanimori Shinji , Mitani Yoshihiko , Honda Ryuji , Matsuo Akihiko , Nakayama Mitsuru
Published: July 2006

The title compounds, key intermediates in the syntheses of (±)-vitamin D3 and (±)-erythro-juvabione, have been prepared in short steps using stereoselective cleavage reactions of the cyclopropane derivatives.
SYNTHESIS OF BROMO-SUBSTITUTED BICYCLIC OXALACTAM AND UNUSUAL ANIONIC DESALTING OLIGOMERIZATION OF ITS SODIUM SALT
Authors: Hashimoto Kazuhiko , Sumitomo Hiroshi , Suzuki Masanori
Published: July 2006

New bromo-substituted bicyclic oxalactam, 4(e)-bromo-8-oxa-6-azabicyclo[3.2.1]octan-7-one (1) was synthesized from sodium 3,4-dihydro-2H-pyran-2-carboxylate. Sodium salt of 1 was found to be oligomerized with the simultaneous desalting in dimethylformamide at 25 °C to give novel oligomers having a bicyclic oxalactam ring in each monomer unit.
REDUCTIVE DEOXYGENATION OF ALCOHOLS VIA ESTERS WITH TRIPHENYLSILANE UNDER NEUTRAL CONDITIONS
Authors: Sano Hiroshi , Ogata Mayako , Migita Toshihiko
Published: July 2006

Treatment of carboxylic esters derived from alcohols with triphenylsilane in the presence of a radical generator at 140 °C gave the corresponding hydrocarbons in good yield.
OXYSOLAVETIVONE. A NEW BIOSYNTHETIC PRECURSOR OF LUBIMIN IN POTATO
Authors: Murai Akio , Yoshizawa Yuko , Katsui Nobukatsu , Sato Shingo , Masamune Tadashi
Published: July 2006

The title compound, isolated newly as a metabolite from solavetivone, was converted into lubimin in potato.
SYNTHESIS OF BIS(DIMETBYLVINYLENEDITHIO)TETRATUIAFULVALENE, BDMVDT-TTF
Authors: Inoue Kazuhiko , Tasaka Yoshihiko , Yamazaki Osamu , Nogami Takashi , Mikawa Hiroshi
Published: July 2006

The title compound was synthesized as an attractive donor molecule for highly conductive organic salts. This molecule has an analogous structure to BEDT-TTF with possibly more planar structure.
FIRST SYNTHESIS OF OXOSELENONIUM SALTS
Authors: Kobayashi Michio , Mihoya Takashi
Published: July 2006

Triaryloxoselenonium salts have been synthesized for the first time by oxidation of selenonium salts with peroxybenzoate anion.
HIGHLY STEREOSELECTIVE ALKYLATION REACTION OF ESTER ENOLATES GENERATED FROM δ-HYDROXY CARBOXYLIC ACID ESTERS
Authors: Narasaka Koichi , Ukaji Yutaka
Published: July 2006

Alkylation reaction of lithium enolates generated from t-butyl esters of δ-hydroxy carboxylic acids by the treatment with lithium diethylamide in THF-HMPA proceeded stereoselectively to afford the corresponding syn-α-alkylated δ-hydroxy esters.
CRYSTAL AND ELECTRONIC STRUCTURES OF LAYERED MOLECULAR SUPERCONDUCTOR, θ-(BEDT-TTF)2(I3)1−x(AuI2)x
Authors: Kobayashi Hayao , Kato Reizo , Kobayashi Akiko , Nishio Yutaka , Kajita Koji , Sasaki Wataru
Published: July 2006

The crystal and electronic structures of molecular superconductor θ-(BEDT-TTF)2(I3)1−x(AuI2)x (x<0.02) were examined. BEDT-TTF molecules form a two-dimensional network. The dihedral angle between the planes of the neighbouring molecules interrelated by the screw axis is about 80°. Examination of the band structure suggests that this complex is the first example of the molecular conductor with a completely round two-dimensional Fermi surface.
ACCERELATION EFFECT OF β-CYCLODEXTRIN ON ELECTROCATALYTIC OXIDATION OF NADH BY FERROCENECARBOXYLIC ACID
Authors: Matsue Tomokazu , Kato Tetsuya , Akiba Uichi , Osa Tetsuo
Published: July 2006

β-Cyclodextrin (β-CD) shows an accelaration effect on the electrocatalytic oxidation of NADH by ferrocenecarboxylic acid (Fca). Quantitative analysis using digital simulation has suggested that the Fca+–β-CD complex existing in only minute amount acts as an effective oxidant for NADH.
THE SURFACE STRUCTURE AND CATALYTIC PROPERTIES OF ONE-ATOMIC LAYER AMORPHOUS NIOBIUM-OXIDE ATTACHED ON SiO2
Authors: Asakura Kiyotaka , Iwasawa Yasuhiro
Published: July 2006

A SiO2-attached one-atomic layer amorphous niobium-oxide catalyst was prepared by the two-stage attaching reaction between silanol groups and Nb(OC2H5)5 followed by chemical treatments with H2O and O2. The one-atomic layer Nb oxide catalyst was found to be active and selective for ethene formation from ethanol.
SILYLMANGANATION OF 1,3-DIENES. A FACILE SYNTHESIS OF FUNCTIONALIZED VINYLSILANES
Authors: Fugami Keigo , Nakatsukasa Shigeki , Oshima Koichiro , Utimoto Kiitiro , Nozaki Hitosi
Published: July 2006

Treatment of 1,3-dienes with (R3Si)3MnMgMe provides silylated allylmanganese compounds which add to carbonyl moiety with high regioselectivity.
METAL-CATALYZED SYNTHESIS OF CARBOXYLIC ESTERS UTILIZING (E)-PHENYL 2-PYRIDYL KETONE O-ACYLOXIMES (PPAO)
Authors: Miyasaka Tadayo , Ishizu Hidehiro , Sawada Akihiro , Fujimoto Akiko , Noguchi Shunsaku
Published: July 2006

(E)-phenyl 2-pyridyl ketone O-acyloximes (PPAO) could be highly activated by metal ions such as Fe3+, Cu2+, and Zn2+, and the most effective catalyst for the synthesis of carboxylic esters was found to be Zn2+. Furthermore, sterically hindered carboxylic esters were easily obtained utilizing PPAOs and alcoholates in high yields.
A MILD AND STEREOSPECIFIC CONVERSION OF VICINAL DIOLS INTO OLEFINS VIA 2-METHOXY-1,3-DIOXOLANE DERIVATIVES
Authors: Ando Masayoshi , Ohhara Hiroshi , Takase Kahei
Published: July 2006

An efficient and practical method for the stereospecific synthesis of olefins from vicinal diols via the corresponding 2-methoxy-1,3-dioxolanes is reported.