bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE BAEYER-VILLIGER OXIDATION OF 7-ALKYLIDENEBICYCLO[2.2.1]HEPTENONE
Authors: Sakai Kunikazu , Yamashita Mitsuo , Shibata Yoshiko 
Published: July 2006

Abstract
The first example of the Baeyer-Villiger oxidation of 7-alkylidene-2-oxo-5-bicyclo[ 2.2.1]heptene is described to give 6-alkylidene-2-oxa-3-oxo-7-bicyclo[3.3.0]octene exclusively, which is the versatile precursor for the short-cut synthesis of Δ12-prostaglandin A2 analogs.
IN SITU GENERATION AND CHEMICAL REACTIVITIES OF HRu(CO)4− RELEVANT TO THE REDUCTION OF CARBON MONOXIDE
Authors: Tanaka Masato , Sakakura Toshiyasu , Hayashi Teruyuki , Kobayashi Toshi-aki 
Published: July 2006

Abstract
HRu(CO)4− could be in situ generated from Ru3(CO)12 in the presence of basic salts in amide solvents when exposed to syn gas. In the reduction of carbon monoxide, HRu(CO)4− generating catalyst systems selectively gave methanol. HRu(CO)4− exerted higher reactivities in the reduction of acetaldehyde and in the bimolecular reductive elimination with CH3COCo(CO)3PPh3, as compared to HRu3(CO)11−.
PREPARATION OF MONOLAYER FILMS OF AROMATIC POLYAMIC ACID ALKYLAMINE SALTS AT AIR–WATER INTERFACE
Authors: Suzuki Masa-aki , Kakimoto Masa-aki , Konishi Toru , Imai Yoshio , Iwamoto Mitsumasa , Hino Taro 
Published: July 2006

Abstract
Thin films of polyamic acid alkylamine salts which possess long alkyl side chain were successfully prepared at air–water interface. It was concluded that the polymer salts had a monolayer structure in which aromatic rings of the polyamic acids lied flat on the water surface.
A NOVEL ROUTE TO α,β-UNSATURATED ESTERS VIA A REFORMATSKY-TYPE REACTION USING SODIUM TELLURIDE
Authors: Suzuki Hitomi , Inouye Masahiko 
Published: July 2006

Abstract
Sodium telluride, prepared by heating tellurium and sodium hydride in a 1:2 molar ratio in dry N,N-dimethylformamide, readily debrominates a bromoacetic ester at low temperatures to generate an enolate anion, which undergoes a Reformatsky-type reaction with various non-enolizable aldehydes to give the corresponding α,β-unsaturated esters in good to moderate yields. Ketones remain almost unaffected under the same conditions.
ULLMANN-TYPE COUPLING REACTION OF ARYL TRIFLUOROMETHANESULFONATES CATALYZED BY IN SITU-GENERATED LOW VALENT NICKEL COMPLEXES
Authors: Yamashita Junzo , Inoue Yoshio , Kondo Takashi , Hashimoto Harukichi 
Published: July 2006

Abstract
The low valent nickel complexes generated in situ from nickel(II) chloride, triphenylphosphine, sodium iodide, and zinc powder in dimethylformamide catalyze the Ullmann-type homo-coupling of aryl trifluoromethanesulfonates to biaryls under ultrasounds irradiation.
VISIBLE LIGHT- AND GAMMA RAY-INDUCED ALKYLATION IN PYRIDINE RING. EFFECTIVE ALKYLATION WITH VISIBLE LIGHT IN THE PRESENCE OF IRON(III) SULFATE
Authors: Sugimori Akira , Yamada Tetsuo 
Published: July 2006

Abstract
Quinoline and 4-methylquinoline are alkylated with alkanecarboxylic acid upon visible light- or gamma-irradiation. In the photo-alkylation, iron(III) sulfate not only accelerates the reaction, but also improves the selectivity for alkylation. Titanium oxide shows smaller effects than iron(III) sulfate.
GAS SENSITIVITY OF CuO/ZnO HETERO-CONTACT
Authors: Nakamura Yoshinobu , Ando Akiro , Tsurutani Tsuyoshi , Okada Osamu , Miyayama Masaru , Koumoto Kunihito , Yanagida Hiroaki 
Published: July 2006

Abstract
Gas sensitivity of CuO/ZnO hetero-contact was investigated at 160–340 °C. The gas sensitivity changed not only with the kind of gases and measuring temperature but with the voltage applied to the hetero-contact. Very high sensitivity and selectivity for CO gas was observed at 260 °C under the applied voltage of 0.1–0.9 V.
SYNTHESIS OF (GLYCOLATO-O,O′)DIAMMINEPLATINUM(II) AND ITS RELATED COMPLEXES
Authors: Totani Tetsushi , Aono Katsutoshi , Komura Michihiro , Adachi Yasuko 
Published: July 2006

Abstract
Glycolatoplatinum(II) complexes, [Pt(OCOCH2O)L2], having a novel five-membered ring structure were obtained by adding an equimolar quantity of glycolic acid to cis-[Pt(OH)2L2] (L: NH3, amines) in water followed by heating. These complexes have also been obtained by reaction of cis-[Pt(NO3)2L2] with sodium glycolate in neutral aqueous solution. These complexes have been characterized by SIMS, IR, and NMR spectroscopy.
INFLUENCE OF ALLOYING ON THE HYDRATION OF ACRYLONITRILE TO ACRYLAMIDE BY COPPER–NICKEL ALLOY CATALYSTS
Authors: Sugiyama Kazuo , Miura Hiroshi , Watanabe Yoshichika , Ukai Yasunori , Matsuda Tsuneo 
Published: July 2006

Abstract
The liquid phase hydration of acrylonitrile to acrylamide was studied over the Cu–Ni alloy catalysts with various compositions. The maximum synergestic effect was observed over the alloy with the surface component ratio of Cu to Ni of 4.
PHOTORESPONSIVE POLYMERS CONTAINING ZIRCONIUM WHICH RESPONDS TO VISIBLE LIGHT
Authors: Yonemura Michiko , Sekine Tadao , Ueda Hisashi 
Published: July 2006

Abstract
Photoresponsive polymers which change their magnetic properties when illuminated by visible light was found. n-Butyl zirconate was polymerized in tetrahydrofuran and other solvents. The polymer, when illuminated, changes its conformation and a new spin-nuclear interaction in ESR spectrum is observed.
ESR STUDY OF CATION RADICALS OF SILYL-SUBSTITUTED ETHERS AND SULFIDES
Authors: Kira Mitsuo , Nakazawa Hiroko , Sakurai Hideki 
Published: July 2006

Abstract
ESR spectra of cation radicals of trialkylsilyl-substituted ethers and sulfides have provided an experimental measure of the mixing between a silicon–carbon σ bonding orbital and a nonbonding orbitals on oxygen and sulfur atoms in the singly occupied molecular orbital.
ENHANCED QUENCHING OF PYRENE FLUORESCENCE IN METHYLVIOLOGEN-INDUCED PREMICELLAR AGGREGATES AND INCLUSION EFFECT OF β-CYCLODEXTRIN ON THE QUENCHING
Authors: Kusumoto Yoshihumi , Shizuka Michiko , Satake Iwao 
Published: July 2006

Abstract
The formation of methylviologen-induced premicelles was evidenced by an enhanced fluorescence quenching and the appearance of a new absorption band of pyrene in the premicellar region of sodium dodecyl sulfate. Addition of β-cyclodextrin to the above system led to less pronounced quenching.
HIGH-PRESSURE CATALYTIC HYDRATION OF OLEFINS OVER VARIOUS PROTON-EXCHANGED ZEOLITES
Authors: Eguchi Koichi , Tokiai Takeo , Kimura Yoshio , Arai Hiromichi 
Published: July 2006

Abstract
Catalytic hydration of ethylene, propylene, and 1-butene to alcohol was investigated at high pressures using proton-exchanged zeolites. All the zeolites more or less exhibited the hydration activities. Pentasil- and ferrierite-type zeolites were the most active among the zeolite catalysts. The activities of zeolite catalysts are correlated with the amount of adsorbed water, indicating that hydrophobic acid sites are effective for olefin hydration.
ELECTROCHEMICAL GROWTH OF Pt ULTRAMICROPARTICLES IN NAFION FILMS ON GLASSY CARBON ELECTRODES
Authors: Itaya Kingo , Matsushima Yoshiyuki , Uchida Isamu 
Published: July 2006

Abstract
The electrodeposition of platinum (Pt) into Nafion films on glassy carbon electrode is described. The Pt particles are dispersed three-dimensionally throughout the Nafion layer. The specific surface area of the particles is surprisingly large, suggesting that the Pt particles are highly dispersed into the Nafion film. The average crystal size of the platinum clusters is on a range of 100 to 200 Å.
pH DEPENDENT OXIDATION-REDUCTION OF 1-BENZENESULFENYL-2-PROPANONE AND ITS OXIDES BY A MICROORGANISM
Authors: Ohta Hiromichi , Kato Yasuo , Tsuchihashi Gen-ichi 
Published: July 2006

Abstract
Incubation of 1-benzenesulfenyl-2-propanone with Corynebacterium equi IFO 3730 in a weakly acidic medium afforded (S)-1-benzenesulfenyl-2-propanol. On the contrary, when the cultivation was carried out at pH 8 with the same bacterium, only the (S)-alcohol was transformed into the starting ketone, the (R)-alcohol being recovered intact. The similar enantioselectivities were also observed in the reaction of 1-benzenesulfinyl-2-propanone.
SPIN-POLARIZED TRANSIENT RADICALS FROM p-BENZOQUINONE AND DI-t-BUTYL-p-QUINONES BY PHOTO-EXCITATION OF BENZOPHENONE IN A MAGNETIC FIELD
Authors: Kaise Masahiro , Nishihara Chizuko , Nozoye Hisakazu , Someno Kazuo 
Published: July 2006

Abstract
In the photochemical electron transfer reactions of t-alkylamine and p-benzoquinone in liquid, emissively spin-polarized transient anion radicals from p-benzoquinone(PBQ) and 2,5- or 2,6-di-t-butyl-p-quinone(25Q or 26Q) are exclusively produced by photo-excitation of benzophenone(BP) in a magnetic field. Transient radicals of quinones with different unpaired spin distribution are obtained at the onset of photolysis.
PREPARATION AND PROPERTIES OF NEW THIOLATO- AND MERCAPTO-TRANSITION METAL COMPLEXES, MR(SR′)(PR″3)2 (M = Ni, Pd; R = H, Ar; R′ = H, Ar). EVOLUTION OF R–R′ FROM THE COMPLEXES THROUGH CLEAVAGE OF THE S–R′ BOND
Authors: Osakada Kohtaro , Hayashi Hiroki , Maeda Meguru , Yamamoto Takakazu , Yamamoto Akio 
Published: July 2006

Abstract
New nickel(II) and palladium(II) complexes having both hydrido and arylthiolato ligands, MH(SAr)(PCy3)2, and complexes with aryl and mercapto ligands, Ni(Ar)(SH)(PEt3)2 (M = Ni, Pd; Ar = C6H5-,p-CH3-C6H4-, p-CH3OC6H4-), were prepared. Thermolysis of these complexes caused cleavage of the S–C or S–H bond to evolve Ar–H.
SYNTHESIS AND RESOLUTION OF A NEW TYPE OF CHIRAL BISPHOSPHINE LIGAND, trans-BIS-1,2-(DIPHENYLPHOSPHINO)CYCLOBUTANE, AND ASYMMETRIC HYDROGENATION USING ITS RHODIUM COMPLEX
Authors: Minami Toru , Okada Yoshiharu , Nomura Ryoichi , Hirota Shuji , Nagahara Yoshitomo , Fukuyama Keiichi 
Published: July 2006

Abstract
Oxidative coupling of the 1,4-dicarbanions derived from bis-1,4-(diphenylphosphinyl)butane gave (±)-trans-bis-1,2-(diphenylphosphinyl)cyclobutane. Asymmetric hydrogenation of dehydroamino acids using rhodium complex of the optically active bisphosphine obtained by reduction of the resolved bisphosphine oxide afforded hydrogenated products in high optical yields.
LEWIS ACID CATALYZED REARRANGEMENT OF VINYLCYCLOPROPANECARBONYL CHLORIDE TO CYCLOPENTENECARBONYL CHLORIDE
Authors: Sakito Yoji , Suzukamo Gohfu 
Published: July 2006

Abstract
Vinylcyclopropane-cyclopentene rearrangement of 2-(2-arylvinyl)cyclopropanecarbonyl chlorides was observed upon treatment with a Lewis acid under mild reaction conditions to afford 2-arylcyclopent-3-enecarboxylates after esterification.
AQUEOUS CHEMISTRY OF TIN(III). A FLASH PHOTOLYSIS STUDY
Authors: Shinohara Nobuyoshi , Mori Katsuhiko , Inoue Makoto 
Published: July 2006

Abstract
Unstable Sn(III) was produced by ultraviolet irradiation of Sn(II) or Sn(IV) chloride complex in deaerated aqueous hydrochloric acid solution. The optical spectrum of the transient species, Sn(III), observed by using the technique of flash photolysis, has a absorption maximum at 280 nm in 1 mol dm−3 HCl and the lifetime is very short. The rate constant of Sn(III) oxidation with oxygen is 1.7×108 mol−1 dm3 s−1.
THE STRUCTURE OF A NEW NATURAL APOTIRUCALLANE-TYPE TRITERPENE AND THE STEREOCHEMISTRY OF THE RELATED TERPENES. X-RAY AND 13C NMR SPECTRAL ANALYSES
Authors: Nakanishi Tsutomu , Inada Akira , Nishi Masatoshi , Miki Takuichi , Hino Ryozi , Fujiwara Takaji 
Published: July 2006

Abstract
The structure of a new apotirucallane-type triterpene, 21-O-acetyl toosendantriol, isolated from the fruit of Melia toosendan was determined by X-ray analysis. Based on comparison of the 13C chemical shifts, the steric structures of the side chains of two epimeric 21-acetates derived from a tirucallane-type terpene, melianone were also clarified.
RADICAL REARRANGEMENT OF A THIOESTER MEDIATED BY COBALAMIN
Authors: Tada Masaru , Inoue Kunimi , Okabe Masami 
Published: July 2006

Abstract
Zinc-reduction of 2-(ethylthio)carbonyl-2-phenylpropyl bromide in the presence of cobalamin gave the products formed by the migration of the thioester group. The formation of olefinic products excludes an anion mechanism and the rearrangement is concluded to be a radical rearrangement under the assistance of cobalamin.
ION-EXCHANGE PROPERTIES OF SILICA-TITANIA MIXED-OXIDE GEL FOR AMMONIA IN AQUEOUS SOLUTIONS
Authors: Kaneko Shoji , Ohtaki Hiromichi , Tsukamoto Kazuyoshi 
Published: July 2006

Abstract
Proton-form silica-titania gel of mole ratio 1:1 exhibited high ion-exchange abilities for ammonia in aqueous solutions. Its apparent capacity increased with increasing pH of solution tested, which attained above 4 mmol g−1 at pH 9. Separation of ammonia and sodium in aqueous solution loaded in advance on the silica-titania gel was complete when used hydrochloric acid as an eluent.
α-ACYLAMINORADICAL ANNELATION IN THE DIASTEREOSELECTIVE SYNTHESIS OF 1- AND 5-SUBSTITUTED TETRAHYDROPYRROLO[1,2-c]OXAZOLE AND 1-SUBSTITUTED PYRROLIZIDINE DERIVATIVES
Authors: Kano Shinzo , Yuasa Yoko , Asami Kenji , Shibuya Shiroshi 
Published: July 2006

Abstract
Diastereoselective synthesis of 1,8-trans-1-substituted and 5,8-trans-5-substituted tetrahydropyrrolo[1,2-c]oxazoles was achieved by an application of α-acylaminoradical cyclization at a silylated triple bond. The method was applied to an enantioselective synthesis of the 1,8-trans-oriented 1-oxygenated pyrrolizidine.
THE MESOMORPHIC PROPERTIES OF 1,2,4-TRISUBSTITUTED BENZENES
Authors: Takenaka Shunsuke , Masuda Yoshihide , Kusabayashi Shigekazu 
Published: July 2006

Abstract
The mesomorphic properties for two series, 1,2,4-tri(4-alkoxyphenoxycarbonyl)benzenes and 1,2,4-tri(4-alkoxybenzoyloxy)benzenes have been examined. For the former series, the nematic and smectic A phases commence from the heptyloxy and nonyloxy homologs, respectively, and the latter series is non-mesogenic.
SYNTHESIS OF (±)-COSTUNOLIDE, AN ANTITUMOR GERMACRANOLIDE, FROM E,E-FARNESOL BY USE OF A LOW-VALENT CHROMIUM REAGENT
Authors: Shibuya Hirotaka , Ohashi Kazuyoshi , Kawashima Keiko , Hori Kazuyuki , Murakami Nobutoshi , Kitagawa Isao 
Published: July 2006

Abstract
E,E-Farnesol was transformed into ω-bromo-farnesal, which cyclized to afford a racemic germacrane-type compound (5) with a low-valent chromium reagent 5 was then converted to (±)-dihydrocostunolide and (±)-costunolide.
PREPARATION OF CARBON ELECTRODES MODIFIED WITH POLY(MERCAPTOHYDROQUINONE)S AND THEIR FUNCTIONS AS pH SENSOR
Authors: Arai Gorou , Koike Takashi , Yasumori Iwao 
Published: July 2006

Abstract
Carbon fiber electrodes (CFE) were modified with either a poly(mercaptohydroquinone) film or a poly(methylmercaptohydroquinone) film by means of electrochemical oxidation. The modified CFE thus prepared showed an excellent Nernstian response to H+ ion over the pH range from 2 to 9.
A NOVEL DECARBOXYLATION OF α-AMINO ACIDS. A FACILE METHOD OF DECARBOXYLATION BY THE USE OF 2-CYCLOHEXEN-1-ONE AS A CATALYST
Authors: Hashimoto Mitsunori , Eda Yutaka , Osanai Yasutomo , Iwai Toshiaki , Aoki Seiichi 
Published: July 2006

Abstract
In the presence of a catalytic amount of 2-cyclohexen-1-one, decarboxylation of α-amino acids proceeds smoothly and affords the corresponding amino compounds in good yields. Optically active amino compounds, (3R)-(−)-3-hydroxypyrrolidine and (2R)-(−)-2-hydroxypropylamine are obtained in 93% and 80% yields, respectively.
PREPARATION OF 18- AND 22-MEMBERED TETRAAZA MACROCYCLES AND THEIR COPPER(II) COMPLEXES
Authors: Fujiwara Manabu , Wakita Hisanobu , Masuda Isao , Matsushita Takayuki , Shono Toshiyuki 
Published: July 2006

Abstract
18- and 22-membered tetraaza macrocycles were prepared from acetylacetone and 1,4-diaminobutane or 1,6-diaminohexane, respectively. Their copper(II) complexes were characterized by electronic spectroscopy and the copper(II) complex of the 18-membered macrocycle was found to be pseudo-tetrahedral.
INTRAMOLECULAR CHARGE TRANSFER TRANSITION FOR SYMMETRY ALLOWED CHARGE TRANSFER INTERACTION IN THE MOLECULES OF Cs SYMMETRY AND A POTENTIAL MODEL TO INTRODUCE NEW INTERSTACK INTERACTION
Authors: Nakasuji Kazuhiro , Yamochi Hideki , Murata Ichiro , Yasuoka Noritake , Kusunoki Masami 
Published: July 2006

Abstract
Three intramolecular charge transfer (CT) compounds, which exhibit clear CT transition for symmetry allowed CT interaction, have been synthesized and examined. In addition, a possible way to introduce new type of interstack interactions in the solid state was proposed from the crystal structure of 7,10-ethenocyclohepta-[de]naphthalene-8,9-dicarbonitrile.
ASYMMETRIC ALLYLATION OF PROCHIRAL ALDEHYDES WITH A NEW ENANTIOSELECTIVE ALLYLATING AGENT PREPARED FROM STANNOUS TRIFLATE, A CHIRAL DIAMINE, AND ALLYLDIALKYLALUMINUM
Authors: Mukaiyama Teruaki , Minowa Nobuto , Oriyama Takeshi , Narasaka Koichi 
Published: July 2006

Abstract
A new enantioselective allylating agent, prepared by treatment of a mixture of stannous trifluoromethanesulfonate and a chiral diamine with allyldialkylaluminum, reacts with prochiral aldehydes to give secondary homoallyl alcohols in good optical yield.
ELECTROLYTE EFFECTS ON THE ELECTROCHEMICAL ACTIVITY OF MICELLE-SOLUBILIZED SUBSTANCE
Authors: Hoshino Katsuyoshi , Suga Kosaku , Saji Tetsuo 
Published: July 2006

Abstract
The cyclic voltammetry of a cationic surfactant with ferrocenyl moiety (Fc) in an anionic micellar solution leads to the conclusion that Fc incorporated in the micelle is electrochemically inactive in the absence of electrolytes and active in the presence of electrolytes.
Selective Liquid-Membrane Transport of Nitro-phenols by a Simple and Costless Carrier. An Application of the Results of Centrifugal Partition Chromatography
Authors: Araki Takeo , Kubo Yasuo , Takata Masao , Gohbara Shinji , Yamamoto Toshiyuki 
Published: July 2006

Abstract
By applying the separation data of countercurrent type chromatography (centrifugal partition chromatography(CPC)) to liquid-membrane transport system(LMT), an effective simple carrier for selective LMT was found. This observation will be an important suggestion for finding out a costless carrier of selective LMT for weakly ionic or non-ionic substrates.
Preparation and Photochemistry of Biphenyls Bridged by Si–X–Si Chains
Authors: Sakurai Hideki , Sakamoto Kenkichi , Kira Mitsuo 
Published: July 2006

Abstract
Photolysis of several biphenyls bridged by Si–X–Si chains are described where the X’s are O, S, NH, and Fe(CO)4. Dimethylsilathione was successfully generated by this method and the first evidence of reductive elimination from bis(silyl)iron to give disilane was demonstrated.
Regioselective Nucleophilic Opening of erythro-and threo-2,3-Epoxy Alcohols
Authors: Kirshenbaum Kenneth S , Sharpless K Barry 
Published: July 2006

Abstract
The epoxide opening reactions of erythro and threo epoxy alcohols with a variety of nucleophiles, both in the presence and absence of Ti(OiPr)4, were examined. In general, opening of threo epoxy alcohols proceeded faster and with higher selectivity than the same reaction with the corresponding erythro isomers.
Novel Synthesis of (R)-(+)-γ-Butyrolactone-γ-3-propionates by Fermenting Baker’s Yeast and Enantiomeric Purity Determination Using NMR Technique
Authors: Moriuchi Fumio , Muroi Hisae , Aibe Hiroshi 
Published: July 2006

Abstract
Optically pure (R)-(+)-γ-butyrolactone-γ-3-propionates 1 were prepared by reducing the precourser, 3-ketoheptane-1,5-dicarboxylic acid mononoesters, with fermenting baker’s yeast. The optical purity (more than 98%) was determined by means of HPLC analysis and NMR determination.
Role of Iron and Ascorbic Acid in the Oxidation of Methyl Linoleate Micelles
Authors: Yamamoto Keiji , Takahashi Mareyuki , Niki Etsuo 
Published: July 2006

Abstract
Oxidations of methyl linoleate micelles in aqueous dispersions induced by iron and ascorbic acid have been studied aiming specifically at elucidating the mechanism of initiation reactions. It was suggested that the initial radicals were generated by the decomposition of hydroperoxide by iron and that ascorbic acid functioned as a reducing agent for ferric ion to give more reactive ferrous ion.
An Efficient Synthesis of Perfluoroalkyl Ketones Using Perfluoroalkyllithiums
Authors: Uno Hidemitsu , Shiraishi Yasukazu , Simokawa Kazuhiro , Suzuki Hitomi 
Published: July 2006

Abstract
Perfluoroalkylation of esters with perf luoroalkyllithiums occurs smoothly in ether at −78 °C, giving the corresponding perfluoroalkyl ketones in good yields.
α,β-Unsaturated Orthoesters as Michael Acceptors. The Trityl Salt-Catalyzed Michael Reaction of α,β-Unsaturated Orthoesters with Silyl Enol Ethers
Authors: Kobayashi Shu , Mukaiyama Teruaki 
Published: July 2006

Abstract
In the presence of a catalytic amount of trityl salts, α,β-unsaturated orthoesters react with various silyl enol ethers to afford the corresponding Michael adducts in good yields.
Dielectric Absorption in Polycrystalline 2-Fluoronaphthalene in Relation to the Dynamic Nature of Disorder in the Crystal
Authors: Aihara Ariyuki 
Published: July 2006

Abstract
A conspicuous dielectric absorption in the low-frequency region (from 0.1 to 104 Hz) has been observed in the crystal of 2-fluoronaphthalene at temperatures between 8.5 and 55.1°C, which could be fitted to a Debye type with a slight distribution of relaxation time. The result seems to confirm that the disorder observed by the X-ray crystal structure analysis of Chanh and Haget–Bouillaud is dynamic in nature. Further, a phase change at about 40°C is suggested from the sudden decrease in the magnitude of dielectric permittivity.
Suppression of Luminescence Background in Raman Spectra by Pulsed Laser Excitation
Authors: Tahara Tahei , Hamaguchi Hiro-o , Tasumi Mitsuo 
Published: July 2006

Abstract
It has been found that excitation with nanosecond laser pulses suppresses the luminescence background in the Raman spectra of some organic compounds by factors of ten to hundred compared with ordinary cw-laser excitation. This finding may lead to a novel effective means for luminescence quenching in Raman spectroscopy.
Reaction of Diphenylcyclopropenone with Nitroketeneaminals. Synthesis of 6-Amino-2-pyridones and Their m-Chloroperbenzoic Acid Oxidation to 2,3-Diphenylmaleimides
Authors: Takahashi Masahiko , Nozaki Chiyoshi , Shibazaki Yoshio 
Published: July 2006

Abstract
Reaction of diphenylcyclopropenone with nitroketeneaminals gave 6-amino-2-pyridones, which were oxidized by m-chloroperbenzoic acid to 2,3-diphenylmaleimides.
A RPLC C30 Column for the Separation of Oligonucleotides
Authors: Makino Keisuke , Ozaki Hiroaki , Imaishi Hiromasa , Takeuchi Tamio , Fukui Toshikazu 
Published: July 2006

Abstract
In reversed-phase high-performance liquid chromatography of large oligonucleotides, synthesized chemically and subsequently deblocked, a silica-based column prepared with triacontyldimethylchlorosilane, has been found to be superior to those with octadecylsilyl ligand.
The Preparation of Optically Pure 3-Hydeoxybutanoic Acid and Its Homologues as the Dibenzylammonium Salt
Authors: Kikukawa Tadashi , Iizuka Yoshitomi , Sugimura Takashi , Harada Tadao , Tai Akira 
Published: July 2006

Abstract
Optically pure (R)- and (S)-3-hydroxybutanoic acid and its homologues are prepared by the method consisting of the enantioface differentiating hydrogenation of methyl 3-oxoalkanoate to methyl 3-hydroxyalkanoate(80–90% e.e.) over asymmetrically modified nickel catalyst and the preferential crystallization of optically pure 3-hydroxyalkanoic acids from the hydrogenation products as the dibenzylammonium salts.
Tubastrine, a New Guanidinostyrene from the Coral Tubastrea aurea
Authors: Sakai Ryuichi , Higa Tatsuo 
Published: July 2006

Abstract
Tubastrine has been isolated as an antiviral constituent of the coral Tubastrea aurea, and its structure was shown to β-(aminoiminomethyl)amino-3,4-dihydroxystyrene.
Reduction of Imines and Enamines with Hydrogen Telluride. An Application to Reductive Alkylation of Amines with Carbonyl Compounds
Authors: Kambe Nobuaki , Inagaki Tohru , Miyoshi Noritaka , Ogawa Akiya , Sonoda Noboru 
Published: July 2006

Abstract
Hydrogen telluride was found to reduce imines and enamines to the corresponding amines under mild conditions. As an application of this reduction,a new method for reductive alkylation of primary and secondary amines with ketones or aldehydes has been developed.