bluuebunny/crossref_metadata_2025_split huggingface dataset:
(+)-β-FRULLANOLIDE AND (+)-BROTHENOLIDE, TWO NEW SESQUITERPENE LACTONES FROM THE LIVERWORT FRULLANIA BROTHERI STEPH.
Authors: Takeda Reiji , Ohta Yoshimoto , Hirose Yoshio 
Published: July 2006

Abstract
Two new sesquiterpene lactones, named (+)-β-frullanolide and (+)-brothenolide, were isolated from liverwort Frullania brothevi Steph.
The absolute structures of these lactones have been established.
ELIMINATION REACTION IN d-GLUCURONOLACTONE AND d-MANNURONOLACTONE
Authors: Tajima Kiyohiko , Itoh Hiroshi , Morooka Hitoshi 
Published: July 2006

Abstract
Triacetate of d-glucuronolactone (1) or d-mannuronolactone (2) is converted to 3-acetoxy-6-diacetoxymethylpyrane-2-one (3) and 2,5, 6 6-tetraacetoxy-2,4-hexadienoic acid (4) respectively by treatment with acetic anhydride-potassium acetate-18-crown-6 or acetic anhydridetriethylamine.
RELATIONSHIP BETWEEN THE CYCLODEXTRIN CATALYSES IN THE CLEAVAGES OF PHENYL ACETATES AND THE TIME-AVERAGED CONFORMATIONS OF THE INCLUSION COMPLEXES
Authors: Komiyama Makoto , Hirai Hidefumi 
Published: July 2006

Abstract
The time-averaged position of p-nitrophenyl acetate, phenyl acetate, or m-nitrophenyl acetate in the cavity of α-cyclodextrin is determined in the 1:1 mixture of dimethyl sulfoxide and water by 1H-NMR spectroscopy. The magnitude of the acceleration of the cleavage of these substrates by α-cyclodextrin increases with the decrease of the distance between the carbonyl carbon atom of the substrate and the 0-2 atom of α-cyclodextrin.
CONSERVATION OF CHLOROPHYLL A AGGREGATES FORMED UNDER A SOLID CONDITION IN THEIR AQUEOUS SOLUTIONS. A NOTABLE ROLE OF SYNTHETIC AND NATURAL MACROMOLECULES
Authors: Inamura Isamu , Toki Kenzi , Araki Takeo , Ochiai Hideo 
Published: July 2006

Abstract
Aggregation states of chlorophyll a (Chla) solid samples were found to be conserved in a homogeneous aqueous solution when dissolved in an aqueous solution of a water-soluble synthetic or natural macromolecule, e.g., PVA, PVP, PEG or BSA. The conservation of aggregation states was effective both for the monomeric (670nm) and microcrystalline (740nm) species. Furthermore, the states of Chla aggregate were stable for at least 1.5 years in the aqueous solution, as showing no significant spectral changes.
PHOTO-NUCLEOPHILIC SUBSTITUTION REACTION OF HALOGENOANTHRAQUINONE IN CONCENTRATED SULFURIC ACID PHOTO-HYDROXYDEHALOGENATION
Authors: Seguchi Kazuyoshi , Ikeyama Hiromi 
Published: July 2006

Abstract
The photo-reaction of halogen-substituted anthraquinones in sulfuric acid was studied with near UV or visible light. α-Chloro-substituted anthraquinones were photo-hydroxylated mainly to form α-hydroxyanthraquinones in fairly good yields. However, β-halogenoanthraquinones gave no dehalogenated products under the same conditions.
POLYNUCLEAR CARBONYL COMPLEXES OF RUTHENIUM AND OSMIUM WITH METHYLTHIOLATE AND BROMIDE BRIDGING LIGANDS
Authors: Ohyoshi Akira , Götzfried Franz , Beck Wolfgang 
Published: July 2006

Abstract
The reactions of Ru3(CO)12 and Os3(CO)12 with (CH3S)2 give polymeric [Ru(SCH3)2(CO)2]n, (n = 242) and [Os (SCH3)2(CO)2]n, (n = 34). The polymers react with bromine to form binuclear derivatives, [MBr(SCH3)2(CO)2]2, (M = Ru, Os). The i.r. and x-ray photoelectron data, and the possible structures are reported.
OXIDATIVE DEGRADATION OF HYDROXY AMINO ACIDS BY CONTACT GLOW DISCHARGE ELECTROLYSIS
Authors: Harada Kaoru , Terasawa Jun-ichi , Gunji Hiromi 
Published: July 2006

Abstract
Oxidative degradation of several hydroxy amino acids was carried out in order to confirm the reaction pathway of the oxidative degradation of β- and γ-amino acids by contact glow discharge electrolysis. The results indicate that the reaction products from hydroxy amino acids support the hypothesis that the oxidative degradation of β- and γ-amino acids pass through hydroxy amino acids.
SYNTHESIS OF N-FORMYLINDOLINE DERIVATIVES BY LEWIS ACID CATALYZED CYCLIZATIONS OF o-(2-HYDROXYALKYL)PHENYL ISOCYANIDES
Authors: Ito Yoshihiko , Kobayashi Kazuhiro , Saegusa Takeo 
Published: July 2006

Abstract
o-(2-Hydroxyalkyl)phenyl isocyanides (2), which are prepared by the reaction of o-lithiomethylphenyl isocyanides (1) with ketone and aldehyde are cyclized by Lewis acid catalyst to N-formylindoline derivatives (3).
SYNTHESIS AND ABSOLUTE CONFIGURATION OF (−)-D3-TRITWISTANE, (−)-(1S,3S,6S,7S,10S,12S)PENTACYCLO[8.4.0.02,7.03,12.06,11]TETRADECANE
Authors: Nakazaki Masao , Naemura Koichiro , Chikamatsu Hiroaki , Iwasaki Masami , Hashimoto Masaki 
Published: July 2006

Abstract
Diazomethane ring expansion of 12-acetoxy-C2-bismethanotwistan-8-one (11) followed by the Wolff–Kishner reduction and the Jones oxidation gave C2-methanoditwistan-4-one (14) whose incubation with Rhodotorula rubra afforded the (−)-enantiomer 16, which was converted into (−)-(1S,3S,6S,7S,10S,12S)-D3,-tritwistane (7).
CONTROL OF REGIOSELECTIVITY IN α-CHLORINATION OF AN UNSYMMETRICAL DIALKYL SULFOXIDE WITH N-CHLOROSUCCINIMIDE
Authors: Ogura Katsuyuki , Imaizumi Jun-ichi , Iida Hirotada , Tsuchihashi Gen-ichi 
Published: July 2006

Abstract
In chlorination of an alkyl methyl sulfoxide (the alkyl = ethyl, isobutyl, or isopropyl) with N-chlorosuccinimide, the corresponding 1-chloroalkyl methyl sulfoxide was predominantly formed, while addition of pyridine into the reaction system reversed the regioselectivity to give an alkyl chloromethyl sulfoxide as a major product.
MONITORED AMINOLYSIS OF 3-ACYLTHIAZOLIDINE-2-THI0NE: A NEW SYNTHESIS OF MACROCYCLIC AMIDES
Authors: Nagao Yoshimitsu , Seno Kaoru , Miyasaka Tadayo , Fujita Eiichi 
Published: July 2006

Abstract
A new efficient procedure for synthesis of macrocyclic amides has been exploited by aminolysis of thiazolidine-2-thione amide (1) of dicarboxylic acid with diamines (4), or spermidine (7). A variety of macrocyclic diamides (5 and 8) and/or tetramides (6, 9, 12, and 13) have been synthesized in high yields. One can monitor the reaction, since the original yellow color of the starting material (1) disappears at the end of the reaction.
ION TRANSPORT THROUGH LIQUID MEMBRANE DRIVEN BY REDOX POTENTIAL. MULTI-COMPONENT ION CARRIER AS A MEDIATOR
Authors: Ohki Akira , Takagi Makoto , Ueno Keihei 
Published: July 2006

Abstract
A new-type of ion transport system driven by redox potential was presented. Nickel bisdithiolene complex, which undergoes the redox reaction of (1-Ni0)\ightleftharpoons (1-Ni−), transported anions through a diphenyl ether liquid membrane by use of a lipophilic cation as a co-carrier.
ASYMMETRIC TOTAL SYNTHESIS OF INDOLMYCIN
Authors: Takeda Takeshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
An asymmetric total synthesis of indolmycin was achieved via a key intermediate, α-indolmycenic acid ester. The ester was obtained by oxygenation of methyl (S)-3-(3-indolyl)butanoate which was prepared by asymmetric synthesis utilizing (2R,3S)-3,4-dimethyl-2-phenylperhydro-l,4-oxazepine-5,7-dione. (2S,3R)-N-[2-Hydroxy-3-(3-indolyl)-butanoyl]-N′-methylthiourea prepared from α-indolmycenic acid ester was treated with 2-chlorobenzoxazolium salt to give indolmycin in 93% optical purity.
COPPER (I)-CATALYZED REACTION OF ISOPRENE BROMOHYDRIN WITH ORGANOLITHIUM REAGENT
Authors: Araki Shuki , Butsugan Yasuo 
Published: July 2006

Abstract
The reaction of isoprene bromohydrin (1-bromo-2-methyl-3-buten-2-ol) (1) with ethyl-, propyl- and butyllithium in the presence of copper (I) iodide leads to the exclusive formation of the vinyl group migrated 2-alkyl-4-penten-2-ols (3d–3f), in contrast to the reaction with methyl-, phenyl- and benzyllithium, which yields the corresponding 2-methyl-4-substituted-2-buten-l-ols (2a–2c).
KINETICS OF THE SPECIFIC BINDING OF IRON(III)-NITRILOTRIACETATE TO HUMAN APO-TRANSFERRIN AND OF THE LIGAND EXCHANGE OF THE RESULTING COMPLEX USING THE STOPPED-FLOW TECHNIQUE
Authors: Honda Kenji , Nishikata Ichiro , Sasakawa Shigeru 
Published: July 2006

Abstract
The biphasicity was observed in the initial step of the reaction between Fe(III)-NTA and transferrin and it could be assigned not to the succesive mechanism involving two elementary steps of the reaction but to the difference in reactivity between two specific binding sites of transferrin.
INTRAMOLECULAR INTERACTIONS BETWEEN CARBONYL MOIETIES AND CHLORO OR METHOXYL GROUP IN TRIPTYCENE SYSTEMS
Authors: Oki Michinori , Izumi Giichi , Yamamoto Gaku , Nakamura Nobuo 
Published: July 2006

Abstract
9-Substituted 1,4-dimethoxytriptycenes, where the substituents contain a carbonyl group, favor ±sc conformations relative to the ap. 9-Substituted 1,2,3,4-tetrachlorotriptycenes exist as mixtures of ±sc and ap conformations of which ratios vary according to steric and electronic effects. Some anomalies involving aldehydes and ketones are discussed with the use of 1H NMR and IR spectra.
MÖSSBAUER SPECTROSCOPIC STUDIES ON THE GLASS STATE IN DIETHYLFERROCENE
Authors: Sato Kumiko , Katada Motomi , Sano Hirotoshi 
Published: July 2006

Abstract
The discontinuous temperature dependence of Mössbauer recoil-free fraction observed in diethylferrocene, reflects the transition from the glass state to the super-cooled liquid state followed by crystallization on heating the sample which was prepared by cooling quickly the liquid sample with liquid nitrogen. On cooling the crystallized diethylferrocene, the temperature dependence was similar to that found monoethylferrocene.
THE MICHAEL-TYPE REACTION OF LITHIUM 1-ALKYNYLTRIALKYLBORATES WITH METHYL VINYL KETONE IN THE PRESENCE OF TITANIUM TETRACHLORIDE. A NEW SYNTHESIS OF δ-DIKETONES FROM ORGANOBORANES
Authors: Hara Shoji , Kishimura Kotaro , Suzuki Akira 
Published: July 2006

Abstract
1-Alkynyltrialkylborates readily available from trialkylboranes and lithium acetylides react with methyl vinyl ketone in the presence of titanium tetrachloride followed by hydrogen peroxide oxidation under neutral conditions to give corresponding δ-diketones.
A NEW PREPARATIVE METHOD FOR 1,3-DICARBONYL COMPOUNDS BY THE REGIOSELECTIVE OXIDATION OF α,β-UNSATURATED CARBONYL COMPOUNDS, CATALYZED BY PdCl2 USING HYDROPEROXIDES AS THE REOXIDANT OF Pd0
Authors: Tsuji Jiro , Nagashima Hideo , Hori Kimihiko 
Published: July 2006

Abstract
α,β-Unsaturated esters and ketones are oxidized regioselectively to give β-keto esters and 1,3-diketones in good yields in aqueous acetic acid using Na2PdCl4 as the catalyst and t-butyl hydroperoxide or hydrogen peroxide as the reoxidant of Pd0.
SPECTROSCOPIC STUDIES ON β-CAROTENE DOPED WITH IODINE AND SULFUR TRIOXIDE—DOPED POLYACETYLENE MODELS
Authors: Harada Issei , Furukawa Yukio , Tasumi Mitsuo , Shirakawa Hideki , Ikeda Sakuji 
Published: July 2006

Abstract
The Raman and absorption (ultraviolet through infrared) spectra of β-carotene doped with iodine and sulfur trioxide were studied. The doping gave significant effects on the Raman and absorption spectra which were interpreted as arising from the transfer of an electron from a local site in β-carotene to a dopant and the resultant shortening of the length of double-bond conjugation. Definite information on the form of iodine in the β-carotene—iodine complex was obtained.
DETERMINATION OF INTRINSIC QUANTUM EFFICIENCIES OF PHOTOELECTROCHEMICAL REACTIONS ON SEMICONDUCTOR ELECTRODES BY TEMPERATURE MEASUREMENT
Authors: Maeda Yasuhisa , Fujishima Akira , Honda Kenichi 
Published: July 2006

Abstract
Quantum efficiencies of photoelectrochemical reactions on various semiconductor electrodes were easily determined by a new method—the measurement of temperature changes of the surface of semiconductor electrodes. The characteristics of this method were discussed, and the quantum efficiencies were compared with those by the usual chemical actinometric method.
TEMPERATURE AND MATRIX EFFECTS ON MULTIPLICITY-SPECIFICITY AND C–H INSERTION SELECTIVITY IN REACTION OF PHENYLCARBENE
Authors: Tomioka Hideo , Suzuki Shinji , Izawa Yasuji 
Published: July 2006

Abstract
Photochemical studies of phenyldiazomethane in 2-chloropropane as a function of temperature reveal that C–Cl insertion of singlet phenylcarbene is dominant at lower temperature as long as the solvent is liquid, but primary C–H insertion becomes near-exclusive in a rigid matrix, suggesting that two kinds of matrix effect are operating.
FORMATION OF ETHYNYL METALLOCENYL KETONE FROM 1,1,1-TRICHLORO-3-ALKOXY-3-METALLOCENYLPROPANE
Authors: Akiyama Takeo , Hattori Toshiaki , Ito Kazuo , Uryu Takashi , Kajitani Masatsugu , Sugimori Akira 
Published: July 2006

Abstract
1,1,1-Trichloro-3-ethoxy-3-ferrocenylpropane(1a) gives ethynyl ferrocenyl ketone(2a) via an unusual elimination of hydrogen chloride, when 1a is treated with alkali and then acid. The ruthenium analog(1b) also affords ethynyl ruthenocenyl ketone(2b). No migration of the side chain is involved in this process.
FORMATION OF AN Sb-ENRICHED SURFACE LAYER ON Fe2O3–Sb2O4 CATALYST STUDIED BY X-RAY PHOTOELECTRON SPECTROSCOPY
Authors: Aso Isao , Amamoto Taro , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
The surface analyses of Fe2O3–Sb2O4 catalysts by XPS showed that the surface of FeSbO4 grains was enriched in Sb content at the bulk compositions Sb/Fe &gt; 1. The surface layer, which was considered to be responsible for the selective propene oxidation, had an estimated composition Sb/Fe ≅ 2, suggesting a surface compound like FeSb2O6.
A GENERAL SYNTHETIC METHOD FOR ORSELLINIC ACID MOIETY OF MACROLIDES BY THE PALLADIUM-CATALYZED CARBONYLATION OF ARYL IODIDE AND ITS APPLICATION TO ZEARALENONE SYNTHESIS
Authors: Takahashi Takashi , Nagashima Toshiharu , Tsuji Jiro 
Published: July 2006

Abstract
Palladium-catalyzed carbonylation of 1-iodo-2-phenylthiomethyl-4,6-dimethoxybenzene (9) with 10-iodo-6,2′-[1,3] dioxolane-2-decanol (10) afforded the corresponding ω-iodoalkyl ester of 2-phenylthiomethyl-4,6-dimethoxybenzoate (3) in 70% yield, which is the precursor of Zearalenone (1). 1-Iodo-2-phenylthiomethyl-4,6-dimethoxybenzene (9) was prepared from 3,5-dihydroxybenzoic acid (5a). This method of carbonylation offers a general and convenient synthetic method for an orsellinic acid moiety of orsellinic acid type macrolides.
SYNTHESIS OF PROSTAGLANDIN D3
Authors: Konishi Yoshitaka , Wakatsuka Hirohisa , Hayashi Masaki 
Published: July 2006

Abstract
Prostaglandin D3 has been synthesized from (−)-2-oxa-3-oxo-6-syn-formyl-7-anti-(2-tetrahydropyranyloxy)-cis-bicyclo[3,3,0]octane, a general synthetic intermediate for natural prostaglandins.
SYNTHESIS AND EPOXIDATION OF TRANS-5,6-DIACETOXY-1-BENZOYLOXYMETHYL-1,3-CYCLOHEXADIENE
Authors: Ogawa Seiichiro , Toyokuni Tatsushi , Ara Masayasu , Suetsugu Masaru , Suami Tetsuo 
Published: July 2006

Abstract
Epoxidation of a newly prepared trans-5,6-diacetoxy-1-benzoyloxymethyl-1,3-cyclohexadiene by m-chloroperbenzoic acid in dichloroethane gave several isomeric compounds of the biologically important highly oxygenated cyclohexane derivatives.
THIOL-ESTER-THIONO-ESTER REARRANGEMENTS INDUCED BY ALKYLATING REAGENTS, PERACIDS, OR N-HALOSUCCINIMIDE IN THE 3-ACYLTHIO-4-ARYL-3-ISOTHIAZOLINE-5-THIONE SYSTEM
Authors: Nishiwaki Tarozaemon , Kawamura Etsuko , Abe Noritaka , Iori Mitsuo 
Published: July 2006

Abstract
Alkylations of 3-acylthio-4-aryl-3-isothiazoline-5-thiones with diazomethane, triethyloxonium tetrafluoroborate, or alkyl iodide afford 5-alkylthio-4-aryl-3-thioacyloxyisothiazoles, whereas the reactions of these isothiazolines with peracids or N-halosuccinimide produce bis(4-aryl-3-thioacyloxyisothiazol-5-yl) disulfides.
INTERSYSTEM CROSSING OF NITROANTHRACENE DERIVATIVES STUDIED BY PICOSECOND SPECTROSCOPY
Authors: Hamanoue Kumao , Hirayama Satoshi , Nakayama Toshihiro , Teranishi Hiroshi 
Published: July 2006

Abstract
By a picosecond spectroscopy method, build-up times of T′←T1 absorption have been measured for 9-nitroanthracene derivatives. Rather long build-up times (72 to 86 psec) lead us to the conclusion that the observed build-up times represent the rates of internal conversion (Tn\ightsquigarrowT1) and that the indirect ISC is the most important.
SIMILARITY IN THE STRUCTURE OF THE BINDING SITES BETWEEN A PAIR OF REACTING MOLECULES: ITS EFFECT ON MOLECULAR RECOGNITION
Authors: Endo Tadashi , Takeda Yukiko , Kamada Hiroko , Kayama Shigeo , Tasai Hidetoshi 
Published: July 2006

Abstract
Based on the selectivity [the ratio of an unsymmetrical disulfide (4) to symmetrical one (3)] in the oxidation of a pair of thiols (1 and 2) with O2 , it is suggested that maximal recognition between 1 and 2 occurs when 1 and 2 are similar in the structure of the binding sites to each other.
A MILD AND FACILE SYNTHESIS OF ALKYL- AND ARYLPHOSPHONYL DICHLORIDES UNDER NEUTRAL CONDITIONS. REACTION OF BIS(TRIMETHYLSILYL) PHOSPHONATES WITH PCl5
Authors: Morita Tsuyoshi , Okamoto Yoshiki , Sakurai Hiroshi 
Published: July 2006

Abstract
Bis(trimethylsilyl) phosphonates, which are prepared from the dialkyl esters with chlorotrimethylsilane/sodium iodide, are transformed in high yields into the corresponding phosphonyl dichlorides on the treatment with phosphorus pentachloride under mild and neutral conditions.
ORGANORUTHENIUM(II) COMPLEXES PRODUCED BY INSERTION REACTIONS OF SUBSTITUTED OLEFINS INTO A HYDRIDO-RUTHENIUM BOND
Authors: Hiraki Katsuma , Sasada Yoko , Kitamura Tsuneyuki 
Published: July 2006

Abstract
Dimethyl fumarate, 2-vinylpyridine, and acrylonitrile insert into a H–Ru bond of [RuClH(CO)(PPh3)3] (1) to yield new substituted alkylruthenium(II) complexes. Methyl sorbate also reacted with 1 to give a new substituted η3-allylruthenium(II) complex.
A CONVENIENT STEREOSPECIFIC ALKYLATION OF PHENYLACETYLENE BY ELECTROCHEMICAL REACTION OF ORGANOBORANES
Authors: Takahashi Yuzuru , Tokuda Masao , Itoh Mitsuomi , Suzuki Akira 
Published: July 2006

Abstract
The electrochemical reaction of phenylacetylene with trialkylboranes in a tetrahydrofuran solution containing tetraalkylammonium halide gives the corresponding alkynes via a retention of configuration with respect to the boron-carbon bonds. The reaction mechanism is also discussed.
A NEW SYNTHETIC METHOD FOR PREPARATION OF 1,3,4,5-TETRAHYDRO-2H-1-BENZAZEPIN-2-ONE DERIVATIVES
Authors: Ito Yoshihiko , Kobayashi Kazuhiro , Maeno Masayuki , Saegusa Takeo 
Published: July 2006

Abstract
A 1,4-addition reaction of o-lithiomethylphenyl isocyanide to α,β -unsaturated carboxylic acid esters gives, after acid hydrolysis, γ -(o-aminophenyl)butyric acid esters, which are heated at 180°C to afford 1,3,4,5-tetrahydro-2H-1-benzazepin-2-one derivatives.
REACTION OF ENOLATES OF ACYLTRIMETHYLSILANES WITH ALDEHYDES. CANNIZZARO TYPE OXIDATION-REDUCTION REACTION WITH A TRIMETHYLSILYLCARBONYL GROUP
Authors: Kuwajima Isao , Matsumoto Kazuhisa , Sugahara Shuichi 
Published: July 2006

Abstract
The reaction of an acyltrimethylsilane enolate with 2 eq of an aldehyde gives a 1:2 adduct, while that with the enolate of an α-chloroacyltrimethylsilane affords an α, β-unsaturated aldehyde as a 1:1 adduct accompanied by the carboxylic acid derived from the starting aldehyde. An oxidation-reduction reaction mechanism on the trimethylsilylcarbonyl group has been proposed.
CESIUM FLUORIDE-PROMOTED REACTION OF ALDEHYDES WITH S-(2-BENZIMIDAZOLYL)ALKANETHIOATES A NEW METHOD FOR THE PREPARATION OF ENOL ESTERS
Authors: Mukaiyama Teruaki , Murakami Masahiro , Yamaguchi Masahiko 
Published: July 2006

Abstract
Aldehydes are converted to the corresponding enol esters in good yields by treatment with S-(2-benzimidazolyl)alkanethioates in the presence of cesium fluoride.
SPIN TRAPPING REACTION OF DIMERIC NITROSOARENES. POSSIBLE FORMATION OF NITROXIDE RADICAL OF TRIAZACYCLOPROPANE STRUCTURE
Authors: Suehiro Tadashi , Masuda Seiichi , Motoyama Nobuyuki 
Published: July 2006

Abstract
o-Disubstituted nitrosoarenes such as 2,6-dimethyl-, 2,4,6-trimethyl-, and 2,3,5,6-tetramethyl-nitrosobenzenes trap free radicals not only in their monomeric but also in dimeric forms. Diphenylmethyleneamino radicals thus add to nitrosoarene dimer in preference to monomer to yield nitroxides containing possibly triazacyclopropane structure.
VIBRATIONAL RELAXATION IN THE LOWEST SINGLET EXCITED STATE OF PYRAZINE
Authors: Igarashi Hisao , Kaya Koji 
Published: July 2006

Abstract
Collision-induced intramolecular vibrational energy transfer from selected vibronic levels of pyrazine was investigated in the lowest singlet excited state(B3u, nπ*). In 0–0, 10a01, and 6a01 excitations it was found that ν16b(234 cm−1 in S1, b3u) is the efficient energy accepting mode.
A PHOTOCHEMICAL SYNTHESIS OF 4-HYDROXYINDOLE
Authors: Kaneko Chikara , Okuda Wakako , Karasawa Yoshio , Somei Masanori 
Published: July 2006

Abstract
1-Alkoxycarbonyl-4-hydroxyindoles were prepared in ca. 25% yields from 5-(alkoxycarbonylamino)isoquinoline 2-oxides by irradiation in an aprotic solvent, followed by an acid treatment under solvolytic conditions. 1-Benzyloxycarbonyl-4-hydroxyindole was then converted to the title compound by catalytic hydrogenation.
DIRECT TRANSFORMATION OF ARYLAMINES TO ALKENYLARENES UNDER PALLADIUM(0) CATALYSIS
Authors: Kikukawa Kiyoshi , Maemura Kdji , Nagira Kazuhiko , Wada Fumio , Matsuda Tsutomu 
Published: July 2006

Abstract
Olefins could be arylated in good yields by the combination of arylamines (substituted anilines: 4-Me, 4-Cl, 4-Br, 2-NO2, 4-NO2, and 3-aminopyridine) and t-butyl nitrite under palladium(0) catalysis.
SYNTHESIS OF A NEW TRIPHENYLMETHANE COMPLEXON
Authors: Yamada Mutsuo , Takiguchi Isao , Fujimoto Masatoshi 
Published: July 2006

Abstract
A new type triphenylmethane complexon containing an iminodiacetic acid and a pyridinium group incorporated in an o-Cresol Red skeleton was synthesized. The new complexon was found to be useful as a metallochromic indicator for the complexometric titrations of multivalent metal ions, Ga3+, In3+, Tl3+, Fe3+, and Zr4+ ions.
COPPER-CATALYZED REACTION OF GRIGNARD REAGENTS WITH β-PROPIOLACTONES: A CONVENIENT METHOD FOR THE SYNTHESIS OF β-SUBSTITUTED PROPIONIC ACIDS
Authors: Sato Toshio , Kawara Tatsuo , Kawashima Masatoshi , Fujisawa Tamotsu 
Published: July 2006

Abstract
Grignard reagents react with β-propiolactones in the presence of a copper(I) catalyst to give β-substituted propionic acids in high yields.
ELECTRICAL PROPERTIES OF POLYACETYLENE DOPED WITH BF3, H2SO4, AND ClSO3H
Authors: Watanabe Atsushi , Tanaka Masashi , Tanaka Jiro 
Published: July 2006

Abstract
The conductivity of BF3, H2SO4, and ClSO3H doped polyacetylene films is measured as a function of dopant concentration and temperature. The conductivity at 295 K of the heavily doped film is σ295K= 220 Ω−1cm−1 for BF3, 130 Ω−1cm−1 for H2SO4, and 245 Ω−1cm−1 for ClSO3H, respectively. The conductivity of ClSO3H doped film is metallic between 295 and 250 K.
THE TRANSITION METAL-CATALYZED N-HETEROCYCLIZATION. THE RHODIUM-CATALYZED SYNTHESIS OF INDOLES
Authors: Watanabe Yoshihisa , Yamamoto Michihiro , Shim Sang Chul , Miyanaga Sogo , Mitsudo Take-aki 
Published: July 2006

Abstract
Substituted indoles can be prepared in high yields by the reaction between phenylhydrazine and carbonyl compounds at 180°C in the presence of a catalytic amount of a rhodium complex under non-acidic condition.
SULFINES IN THE OXIDATIONS OF 1,2-DITHIOLE-3-THIONES
Authors: Tamagaki Seizo , Hotta Kazuhiko , Kozuka Seizi 
Published: July 2006

Abstract
The oxidation of 1,2-dithiole-3-thiones with MCPBA or NaIO4 gives the sulfines in good yield, while the reactions with O21, O3, NaOCl, and BPO produce 1,2-dithiole-3-ones which are formed via the sulfines as transient intermediates.
INTERACTION OF BIOLOGICALLY RELEVANT Cu(II)-PEPTIDE AND CYSTEINE. TRANSIENT COMPLEXES WITH Cu(II)N3S AND Cu(II)N2S2 CHROMOPHORES
Authors: Hanaki Akira 
Published: July 2006

Abstract
Cu(II)-glycylglycine chelates with cysteine forming red-purple transient. A transient which is formed immediately upon mixing the reactants is a ternary Cu(II) complex. Another transient is a binary Cu(II) complex of cysteine produced successively from the ternary complex. Spectrophotometric properties of those transients are discussed.