bluuebunny/crossref_metadata_2025_split huggingface dataset:
Zirconacyclopropanes and Zirconacyclopropenes. Their Synthesis, Characterization, and Reactions
Authors: Takahashi Tamotsu , Swanson Douglas R , Negishi Ei-ichi 
Published: July 2006

Abstract
Zirconacyclopropenes represented by Cp2Zr(PhCCPh) (PR3) (4), where PR3 is PMe3 or PMePh2, have been prepared by the reaction of Cp2Zr(PR3)2 with PhC≡CPh, isolated as yellowish crystals, and spectroscopically characterized. Zirconacyclopropenes readily react with proton donors, carbonyl compounds, e.g., acetone, and alkynes to induce dimerization of alkynes and are likely intermediates in the ZrCp2-induced bicyclization of enynes.
Novel 3,4-Diarylpyrrolidine-Based Chiral Ligands for the Asymmetric Reaction of Arylmagnesium Bromides with Aldehydes
Authors: Tomioka Kiyoshi , Nakajima Makoto , Koga Kenji 
Published: July 2006

Abstract
Utilizing novel chiral diamine ligands, asymmetric addition of arylmagnesium bromides to aldehydes provided the corresponding carbinols in 40–75% ee.
An Efficient Synthesis of 15-Oxygenated T-Type Spirovetivanes. Its Application to the Synthesis of (±)-[8,8-2H2]Isolubimin
Authors: Murai Akio , Miyazaki Hiroshi , Watanabe Katsuyuki , Masamune Tadashi 
Published: July 2006

Abstract
(4RS,7RS)-11-Hydroxy-15-norsolavetivane, a versatile intermediate for the synthesis of all 15-oxygenated T-type spirovetivanes, has been synthesized with high stereoselectivity. The synthesis has also been applied to preparation of (±)-[8,8-2H2]isolubimin.
Isomerization of Quadricyclanes to Norbornadienes Induced by Silver(I) Catalyst
Authors: Maruyama Kazuhiro , Tamiaki Hitoshi 
Published: July 2006

Abstract
In the silver(I)-catalyzed isomerization of quadricyclanes (1) to norbornadienes(2) in benzene, silver(I) might attack 1 from the exo-side, resulting in the formation of the cationic intermediate to give 2.
Asymmetric [2,3]-Wittig Rearrangement Involving a Chiral Ester Enolate Terminus. A Chiral Synthesis of erythro-α-Hydroxy-β-alkyl Carboxylic Acid Derivatives
Authors: Takahashi Osamu , Mikami Koichi , Nakai Takeshi 
Published: July 2006

Abstract
The title rearrangement of the (E-2-alkenyloxy)acetic esters derived from (−)-8-phenylmenthol has been shown to afford the corresponding 3-alkyl-2-hydroxy-4-pentenoic ester with an extremely high level of diastereoface selection (95–97% de) along with a high erythro selectivity (90–93%).
Reversal of Pressure Effect on Thermal Z–E Isomerization of 4-(Dimethylamino)-4′-nitroazobenzene
Authors: Asano Tsutomu , Okada Toshio 
Published: July 2006

Abstract
It has been discovered that the kinetic effect of pressure on Z–E isomerization of 4-(dimethylamino)-4′-nitroazobenzene reverses at about 500 MPa in glycerol triacetate at 25 °C. At lower pressures, the rate increases with increasing pressure, but at higher pressures, it decreases rapidly with increasing pressure. The most probable reason for this reversed pressure effect is retardation of the intramolecular rotational movements by viscous interactions between the reactant and the solvent molecules.
β-Cyclodextrin–Epichlorohydrin Copolymers as Efficient Catalysts in Phase-Transfer-Catalyzed Nucleophilic Substitution Reactions
Authors: Tanaka Nobuo , Yamaguchi Atsumi , Araki Yoshio , Araki Mikio 
Published: July 2006

Abstract
Copolymers of β-cyclodextrin (β-CD) with epichlorohydrin showed much higher phase-transfer catalytic activity than β-CD in liquid–liquid two-phase nucleophilic displacement reactions. The enhanced efficiency of the polymer catalysts was attributed to the cooperative effect of more than one β-CD group in polymers in bringing a substrate from an organic phase to an aqueous phase.
Rate Controlling Role of the Aprotic Solvents in the Aromatic Nucleophilic Substitution Reaction and the Possible Intervention of a Substrate-Nucleophile Complex as an Intermediate of the Reaction
Authors: Hayami Jun-ichi , Otani Shinichi , Yamaguchi Fumio , Nishikawa Yasuharu 
Published: July 2006

Abstract
SNAr reactions of 1,2,3,5-tetranitrobenzene or 2,4,6-trinitrofluorobenzene with aromatic amines were studied in aprotic solvents by means of stopped-flow kinetic measurements. Base catalysis and negative activation enthalpy were observed in nonpolar solvents, which were ascribed to an intermediate encounter complex.
New Ferroelectric Liquid Crystal Materials. (+)-4-[(2-Methylbutyloxycarbonyl)phenyl]4-(5-Alkyl-1,3-dioxan-2-yl)benzoate
Authors: Haramoto Yuichiro , Kamogawa Hiroyoshi 
Published: July 2006

Abstract
(+)-4-(2-Methylbutyloxycarbonyl)phenyl 4-(5-alkyl-1,3-dioxan-2-yl)benzoate (9) and (+)-4-[(2-methylbutyloxy)phenyl]4-(5-alkyl-1,3-dioxan-2-yl)benzoate and corresponding dithianes and oxathianes were synthesized. Only compounds 9 exhibited the ferroelectric liquid crystal behavior (R=n-c11H23: −4 SmC 93 °C).
Fremy’s Salt Promoted Oxidative Degradation of p-Hydroxybenzylamines and p-Hydroxybenzamides. A Novel Approach to p-Quinones
Authors: Saa José M , Llobera Antonia , Deya Pedro M 
Published: July 2006

Abstract
p-Hydroxybenzylamines and primary p-hydroxybenzamides undergo oxidative degradation by the action of Fremy’s salt, thus providing p-benzoquinones in good yields.
The Mechanism of the Photocatalytic Dehydrogenation of Methanol
Authors: Ohno Masayuki , Uzawa Hisaji , Miyazaki Teruhisa , Tarama Kimio 
Published: July 2006

Abstract
We have studied on the mechanism of the photocatalytic dehydrogenation of methanol over Pt/TiO2. D2 was only evolved from CH3OD, and D2, HD, and H2 were detected in the evolved gas in the case of the mixed sample of CH3OD and CH3OH. These results show that the evolved hydrogen came from hydroxyl hydrogen atom of methanol. And the rate determining step was discussed in connection with comparison among the evolution rates of H2, HD, and D2, respectively.
Syntheses of All Four Possible Diastereomers of Etoposide and Its Aminoglycosidic Analogues via Optical Resolution of (±) -Podophyllotoxin by Glycosidation with d- and l-Sugars
Authors: Saito Hitoshi , Nishimura Yoshio , Kondo Shinichi , Umezawa Hamao 
Published: July 2006

Abstract
Syntheses of all four possible diastereomers of etoposide and its aminoglycosidic analogues have been achieved via optical resolution of (±)-podophyllotoxin by glycosidation with d- and l-sugars.
Regioselectivity in the 1,3-Dipolar Cycloaddition Reaction of Pyridinium Dicyanomethylides with Unsymmetric Alkynes
Authors: Matsumoto Kiyoshi , Uchida Takane , Konishi Hideyuki , Watanabe Youko , Aoyama Kinuyo , Asahi Momoyo 
Published: July 2006

Abstract
Representative pyridinium dicyanomethylides underwent regioselectively 1,3-dipolar cycloaddition onto methyl 3-trimethylsilyl-2-propynate and methyl 3-phenyl-2-propynate yielding the corresponding indolizines whereby 1-methoxycarbonylindolizines forms either exclusively or predominantly, in agreement with HOMO(ylide)–LUMO(dipolarophile) interaction as revealed by CNDO/2 calculation.
Photochemistry of Arenedicarboxylic Thioanhydride. Insertion of Alkene into C(=O)–S Bond of 1,2- and 2,3-Naphthalenedicarboxylic Thioanhydride
Authors: Kubo Yasuo , Okusako Kensen , Araki Takeo 
Published: July 2006

Abstract
Irradiation of 1,2-naphthalenedicarboxylic thioanhydride (5a) or its 2,3-isomer with alkenes in acetonitrile gave naphthothiepindiones by insertion of alkenes into C(=O)–S bond of the thioanhydride. Reactions of 5a with cis- and trans-2-butene were stereospecific, demonstrating that the insertion was caused from the singlet excited state of 5a.
Ethylene Formation from 1-Aminocyclopropanecarboxylic Acid by the Reaction of Molecular Oxygen and Dihydropyridine Mediated by Flavin Mononucleotide and Mn(II) Ion
Authors: Okamoto Tadashi , Shimada Mikio , Oka Shinzaburo 
Published: July 2006

Abstract
Oxidation of 1-aminocyclopropanecarboxylic acid by O2 in the presence of 1-benzyl-3-carbamoyl-1,4-dihydropyridine, Mn(II) ion, and flavin mononucleotide reproduced the biological ethylene forming reaction in plant tissues with respect to products, stereochemistry, and behavior to inhibitors.
NQR Study of the Phase Transition in 2SbCl3·o-Xylene
Authors: Ishihara Hideta , Momozaki Takanori , Yamada Koji , Okuda Tsutomu 
Published: July 2006

Abstract
Temperature dependence of 121Sb NQR frequencies for 2SbCl3·o-xylene showed that a phase transition takes place at about 139 K, whereas the DTA experiment showed no thermal anomaly around the transition temperature.
Synthesis, Isolation, and Characterization of New Mixed-Ligand Ruthenium(III) Complexes with Two Kinds of β-Diketones
Authors: Hoshino Yoshimasa , Yukawa Yasuhiko , Endo Akira , Shimizu Kunio , Satô Gen P 
Published: July 2006

Abstract
A complete series of ruthenium(III) complexes with two kinds of ligands, acetylacetone and 1,1,1-trifluoro-4-phenyl-2,4-butanedione, was synthesized and isolated chromatographically. The isomers were characterized by means of NMR spectroscopy and X-ray single-crystal analysis. An inductive effect of ligand substituents on the methyne NMR signals is briefly discussed.
Ready Thermal DDQ Dehydrogenation of Some Methylcyclopropanes Activated by a Spiro-Fused Fluorene Group
Authors: Murakami Masashi , Tsuji Takashi , Oda Masafumi , Nishida Shinya 
Published: July 2006

Abstract
Some methylcyclopropanes activated by a spiro-fused fluorene group were readily dehydrogenated by DDQ, but not by chloranil, to give a butadiene derivative, which reacted further with DDQ to afford 7-(o,o′-biphenylene)-3,4-dichloro-1,6-dicyano-9-alkylbicyclo[4.4.0]deca-3,8-diene-2,4-dione. In contrast, methylcyclopropanes substituted merely by two phenyl groups were reluctant to undergo the dehydrogenation.
Chemoselective Acylation of Primary Amines in the Presence of Secondary Amines with Acyl Cyanides. Highly Efficient Methods for the Synthesis of Spermidine and Spermine Alkaloid
Authors: Murahashi Shun-Ichi , Naota Takeshi , Nakajima Nobuyuki 
Published: July 2006

Abstract
Acyl cyanides are highly useful reagents for the chemoselective acylation of primary amines in the presence of secondary amines. The reaction provides the versatile method for the short-step synthesis of various naturally occurring polyamines.
Acid-Induced Rearrangements of 2,8-Diazabicyclo[3.2.1]octa-3,6-dienes Leading to 1,4-Dihydropyridine and Pyrrole Derivatives
Authors: Kumagai Tsutomu , Katayose Mitsuo , Mukai Toshio 
Published: July 2006

Abstract
2,8-Dimethoxycarbonyl, 8-methoxycarbonyl, and 2,8-dimethyl derivatives of bicyclo[3.2.1]octa-3,6-diene gave 4-imino-1,4-dihydropyridines and pyrroles under acidic conditions. In addition, the C6–C7 dihydro-analogue produced 2-vinylpyrrole by the methyl carbamate elimination.
Intramolecular Association of Viologen Dimer and Trimer Radical Cations. An Electrochemical and Spectroscopic Study
Authors: Imabayashi Shin-ichiro , Kitamura Noboru , Tokuda Koichi , Tazuke Shigeo 
Published: July 2006

Abstract
Viologen dimer and trimer model compounds were prepared and their reduced forms(i.e., radical cation) were investigated electrochemically as well as spectroscopically. Intramolecular association between two viologen radical cations takes place efficiently, which brings about changes in the electrode reduction processes of these compounds.
Adsorption and Decomposition of Ammonia on New Fe(1×1) Commensurate Overlayers on Ru(001) Surface with or without Co-adsorbed Oxygen
Authors: Egawa Chikashi , Iwasawa Yasuhiro 
Published: July 2006

Abstract
Adsorption and decomposition of ammonia on Fe(1×1) overlayers on Ru(001) surface with or without co-adsorbed oxygen were studied by means of AES, LEED and TDS. Adsorption of ammonia at 520 K on epitaxial Fe overlayers on Ru(001) surface gave a newly-ordered (√7×√7)R19° structure in the wide range of Fe coverages from 0.14 to above 1 ML. The desorption of N2 from the ordered adsorbate-layers showed a sharp peak at 850–950 K, which is consistent with the decomposition of surface nitride, Fe4N, observed for Fe single crystal planes. In contrast, c(4×2) ordered overlayer was observed upon the adsorption of oxygen on an annealed Fe/Ru(001) surface. The decomposition rate of ammonia at a steady state was enhanced by 3.5 times by co-adsorbed oxygen because nitrogen is effectively activated by surrounding oxygen atoms in c(4×2) mixed overlayers.
Pore Structure and Surface Area of CsxH3−xPM12O40 (x = 0–3, M = W, Mo)
Authors: Mizuno Noritaka , Misono Makoto 
Published: July 2006

Abstract
The pore-size and particle-size distributions as well as the surface areas of Cs3PW12O40 and Cs3PMo12O40 have been determined by N2 adsorption and electron micrograph. It was first demonstrated by the quantitative comparison of these data that their micro-and/ or mesopores which gave these compounds very high surface areas were due to the space between the very fine primary particles and that there were no intrinsic micropores in their crystal structure.
Heat-indueed Crystal Transformation of Synthetic Bilayer
Authors: Okuyama Kenji , Ikeda Mieko , Yokoyama Shingo , Ochiai Yanami , Hamada Yusuke , Shimomura Masatsugu 
Published: July 2006

Abstract
The side-by-side arrangement of azobenzene chromophores (H-aggregate) in the self-supporting cast films of C8AzoC10N+Br− changes to the head-to-tail arrangement by heating above 115 °C (J′-aggregate) and by cooling below 60 °C after annealing above 115 °C (J-aggregate). The J-aggregate changes further to the original H-aggregate by absorbing water molecules in the atmosphere.
A New Anodic C–N Bond Forming Reaction Useful to Formation of Aziridine, Azetidine, and Pyrrolidine Rings
Authors: Shono Tatsuya , Matsumura Yoshihiro , Katoh Susumu , Ohshita Jyoji 
Published: July 2006

Abstract
Aziridine, azetidine, and pyrrolidine rings were formed in high yields by anodic oxidation of the corresponding dimethyl α-(ω-tosylaminoalkyl)malonates in methanol containing KI as a mediator.
Amplitude in EXAFS and Ligand Exchange Reaction of Hydrated 3d Transition Metal Complexes
Authors: Miyanaga Takafumi , Watanabe Iwao , Ikeda Shigero 
Published: July 2006

Abstract
EXAFS (Extended X-ray Absorption Fine Structure) spectra are analyzed for a series of hydrated 3d metal complexes in crystal and in aqueous solution. It is found that the peak intensity of the metal-oxygen bond in the Fourier transform of EXAFS being considered to depend on the Debye-Waller factor correlates with the ligand exchange rate constant.
New Dinucleating Ligand, N,N′-Ethylenebis(3-carboxysalicylamine), and Its Dinuclear Copper(II) and Nickel(II) Complexes
Authors: Okawa Hisashi , Kogawa Kazuhiko , Handa Makoto , Matsumoto Naohide , Kida Sigeo 
Published: July 2006

Abstract
A new dinucleating ligand N,N′-ethylenebis(3-carboxysalicylamine) (H4L) has been prepared and its copper(II) and nickel(II) complexes [Cu2(L)]2H2O and [Ni2 (L) (H2O)], were obtained. A significant antiferromagnetic spin–exchange interaction operated in the copper complex through the phenolic bridge (J=−270 cm−1), whereas no spin–exchange interaction was observed for the nickel complex.
Intercalation of Co(II) meso-Tetrakis(1-methyl-4-pyridyl)porphyrin into Montmorillonite
Authors: Kameyama Hiroshi , Suzuki Hitoshi , Amano Akira 
Published: July 2006

Abstract
The title compound was intercalated into montmorillonite as Co–porphyrin complex by ion exchange in acid solution. Interlamellar distance of montmorillonite expanded from its regular value of 0.27 nm to 0.37 nm upon intercalation. Fluorescence emission and electron absorption revealed the retention of Co in the porphyrin intercalated.
α-Alkylation of Lithiated α,β-Unsaturated Aldehyde N,N-Dimethylhydrazones. Synthesis of α-Alkylated β,γ-Unsaturated Aldehydes
Authors: Yamashita Masakazu , Matsumiya Kaoru , Nakano Ken-ichi , Suemitsu Rikisaku 
Published: July 2006

Abstract
Lithiated α,β-unsaturated aldehyde N,N-dimethylhydrazones reacted with alkyl halides accompanying a double bond rearrangement to give α-alkylated β,γ-unsaturated aldehyde N,N-dimethylhydrazones in satisfactory yields. Using this reaction, the sesquiterpene, 2,5,9-trimethyl-2-vinyl-4,8-decadienal was synthesized.
Langmuir–Blodgett Films of Polyvinylamine Modified by Perfluoroacylation. Preparation of Super Thin Films
Authors: Sekiya Akira , Tamura Masanori , Ishida Hiroyasu , Watanabe Masako 
Published: July 2006

Abstract
Long chain perfluoroalkyl groups were introduced to polyvinylamine by perfluoroacylation. Langmuir–Blodgett films of the fluorinated polymer were successfully prepared. The thickness of monolayer of the films were super thin and it was about 8 Å. Characterization of the films were attempted.
Stabilization of a Labile cis-Azobenzene Derivative with Amphiphilic Cyclodextrins
Authors: Niino Hiroyuki , Yabe Akira , Ouchi Akihiko , Tanaka Motoo , Kawabata Yasujiro , Tamura Shoji , Miyasaka Tomohiro , Tagaki Waichiro , Nakahara Hiroo , Fukuda Kiyoshige 
Published: July 2006

Abstract
The cis-isomer of p-Methyl Red (cis-p-MR) was appreciably stabilized by inclusion in equimolar amphiphilic heptakis(6-alkylamino-6-deoxy)cyclodextrins (CnN-CDs) in either chloroform solution or the Langmuir–Blodgett (LB) films, as compared with that in the isolated state. Amino moieties in the cyclodextrin derivatives were found to be essential for a tight inclusion of p-MR and also for the stabilization of cis-isomer.
A Novel Glucose Sensor with a Glucose Oxidase Monolayer Immobilized by the Langmuir–Blodgett Technique
Authors: Tsuzuki Hirohiko , Watanabe Tadashi , Okawa Yusuke , Yoshida Shoichiro , Yano Shigenobu , Koumoto Kunihito , Komiyama Makoto , Nihei Yoshimasa 
Published: July 2006

Abstract
A monomolecular layer of glucose oxidase (GOD) was immobilized on an SnO2 electrode via glutaraldehyde-bridged covalent bonding of GOD to the amino moieties of an octadecylamine Langmuir–Blodgett film. The performance of the electrode as an amperometric glucose sensor was investigated.
The Conformation of N-Ethyl Group in Tetracyano(N-ethylethylenediamine) Complexes of Iron(II), Iron(III), and Cobalt(III)
Authors: Goto Masafumi , Kuroda Yoshitaka 
Published: July 2006

Abstract
The 400 MHz 1H NMR spectrum of tetracyano(N-ethylethylenediamine)cobaltate(III) has shown a pair of methylene resonaces of the ethyl group at 2.87 and 3.23 ppm, while the corresponding ferrate(II) complex has shown them at 2.65 and 3.09 ppm. The coupling constant.3JHCNH’ for the upfield and downfield resonaces of the Co(III) complex are 9.8 and ca. 2.0 Hz, respectively. The paramagnetic tetracyano(N-ethylethylenediamine)ferrate(III) showed two methylene signals of the ethyl group at −14.02 and −21.79 ppm at room temperature. Based on these results it was concluded that the methyl group of the N-ethyl group is predominantly in anti position relative to the central metal ion.
New Chiral Shift Reagents, Optically Active 2,2′-Dihydroxy-1,1′-binaphthyl and 1,6-Di(o-chlorophenyl)-1,6-diphenylhexa-2,4-diyne-1,6-diol
Authors: Toda Fumio , Mori Koji , Okada Jyoji , Node Manabu , Itoh Akichika , Oomine Kyoko , Fuji Kaoru 
Published: July 2006

Abstract
The title compounds were found to be useful as a chiral shift reagent in 1H NMR spectroscopy to determine enantiomeric purity of amines, alcohols, sulfoxides, selenoxides, phosphine oxides, phosphinates, and arsenoxides. It is also reported that the induced chemical shift difference increases when the title compound is used together with the typical chiral shift reagent, Eu(hfc)3.
Aldol Reaction of Aromatic Acetals with Cyclic and Acyclic Alkyl Enol Ethers by Electrogenerated Acid (EG Acid) as a Catalyst
Authors: Inokuchi Tsutomu , Takagishi Sadahito , Ogawa Keiji , Kurokawa Yuji , Torii Sigeru 
Published: July 2006

Abstract
Aldol reaction of aromatic acetals with alkyl enol ethers proceeds efficiently with electrogenerated acid (EG acid) independently prepared in an MeCN–NaClO4/Bu4NClO4–(Pt) system.
Transannular Photocycloaddition in 2,5-(trans-4-Octeno)hydroquinones. Striking Difference in Reactivity due to Relative Orientation of the Two Reacting Functions
Authors: Miyake Masaru , Tsuji Takashi , Nishida Shinya 
Published: July 2006

Abstract
2,5-(trans-4-0cteno)hydroquinones with pseudo-gauche (B) configuration undergo transannular photocycloaddition with ease ultimately to give diketones whereas those with pseudo-eclipse (A) configuration are much less reactive. The difference in the reactivity may be interpreted in terms of frontier MO control.
Palladium-Catalyzed Allylidenation of Aldehyde. A Simple and Convenient Method for the Preparation of Conjugated Diene and Polyene Compounds
Authors: Okukado Nobuhisa , Uchikawa Osamu , Nakamura Yukari 
Published: July 2006

Abstract
Allylic phenylcarbamates prepared from allylic alcohols and phenyl isocyanate in situ reacted with aldehydes to give conjugated dienes in good yields in the presence of tributylphosphine and a catalytic amount of Pd(PPh3)4. This method proved to be suitable for the preparation of polyene compounds such as carotenoids.
Photoarylmethylation of 1,4-Dicyanonaphthalene by Use of Group 14 Organometallic Compounds
Authors: Mizuno Kazuhiko , Terasaka Kiyotaro , Yasueda Masahiro , Otsuji Yoshio 
Published: July 2006

Abstract
The photoreaction of 1,4-dicyanonaphthalene (DCN) with arylmethylsilanes, germane, and stannane in polar solvents gave the arylmethylated products of DCN in high yields. The fluorescence of DCN was efficiently quenched both in polar and nonpolar solvents by these group 14 organometallic compounds. In cyclohexane, the emission from the exciplex between DCN and arylmethylsilanes was observed. The mechanistic features of the photoreaction are described.
Syntheses of [1.1]Ferrocenylruthenocenophanes and 57Fe-Moessbauer Spectroscopic Studies of Their Reaction Products with Benzoquinone and BF3–Et2O
Authors: Watanabe Masanobu , Sano Hirotoshi 
Published: July 2006

Abstract
[1.1]Ferrocenylruthenocenophane was prepared by the reduction of [1.1]ferrocenylruthenocenophane-1,12-dione. [1.1]Ferrocenylruthenocenophane and [1.1]ferrocenylruthenocenophane-1,12-dione react with BF3–Et2O containing benzoquinone and give black monocationic salts analyzed as [1.1]ferrocenylruthenocenophanium+BF4− and [1 .1]ferrocenylruthenocenophane-1,12-dionium+BF4−, respectively. 57Fe-Moessbauer spectroscopic studies of the salts suggest the presence of an intramolecular electron transfer between the Ru and Fe atoms.
One-Electron Reduction of Eu3+ Ions Induced by the Irradiation of γ-Ray or UV-Light. The Fluorescence Properties of Eu2+ Ions in an Ethanol Matrix
Authors: Ishida Akito , Takamuku Setsuo 
Published: July 2006

Abstract
Irradiation of γ-ray or UV-light induced an efficient one electron reduction of Eu3+ ions in a low temperature matrix of ethanol. Eu2+ ions produced by these processes showed a strong fluorescence which is affected by the circumstances at low temperatures.
Thermal Analysis of YBa2(Cu1−xFex)3O7−y Oxide Superconductor
Authors: Fujiwara Terufumi , Nakata Hiroyuki , Kumamaru Takahiro , Maeno Yoshiteru , Aoki Yuji , Fujita Toshizo 
Published: July 2006

Abstract
Thermogravimetry and powder X-ray diffraction measurements have been made for the title superconductors to show a marked discontinuity in the slope of oxygen content vs. c cell dimension plots at 810 °C (T2), other than at about 400 °C (T1). The oxygen content at T2 increases with increasing Fe doping content.
Asymmetric Intramolecular Ene Reaction Catalyzed by a Chiral Titanium Alkoxide
Authors: Narasaka Koichi , Hayashi Yujiro , Shimada Satoru 
Published: July 2006

Abstract
Asymmetric intramolecular ene reaction proceeds by employing a chiral titanium alkoxide as a Lewis acid, and cyclohexane derivatives are prepared in high enantioselectivity from 1,3-oxazolidin-2-one derivatives of 2,8-dienoic acids.
Synthesis of (R)-(−)-O-Methyljoubertiamine
Authors: Asaoka Morio , Fujii Naoaki , Takei Hisashi 
Published: July 2006

Abstract
The title compound was synthesized by utilizing [3,3]sigmatropic rearrangement of 3-substituted 2-cyclohexenol derivative for the construction of optically active quaternary carbon center.