bluuebunny/crossref_metadata_2025 huggingface dataset:
A RAPID ANOMERIZATION OF ALKYL PER-O-BENZYL-β-d-GLUCOPYRANOSIDES BY TITANIUM TETRACHLORIDE
Authors: Morishima Naohiko , Koto Shinkiti , Zen Shonosuke
Published: July 2006

Alkyl per-O-benzyl-β-d-glucopyranosides are rapidly anomerized into the corresponding α-anomer by TiCl4 in CH2Cl2 at 25°C. Replacement of the benzyl group at 0-6 by acetyl one dramatically slows the reaction but those of other benzyl groups at 0-2, 0-3, and 0-4 do not. A plausible scheme for the reaction in which benzyloxymethylene group and ring oxygen play an important role is presented.
DEOXYGENATIVE THIOACETALIZATION OF CARBONYL COMPOUNDS WITH ORGANIC DISULFIDE AND TRIBUTYLPHOSPHINE
Authors: Tazaki Masato , Takagi Makoto
Published: July 2006

A new deoxygenative thioether formation from carbonyl compounds as well as epoxides is presented (eq. 1–3). The reaction proceeds with the combined use of alkyl or aryl disulfide and tributylphosphine under neutral and mild conditions. The reaction with aldehydes proceeds with special ease to give thioacetals in high yields, and can be a valuable synthetic reaction.
SYNTHESIS OF [2.2]METACYCLO(1,3)AZULENOPHANE AND ITS CONVERSION TO AZULENO [1,2,3-cd]PHENALENE
Authors: Nesumi Yasuhiro , Nakazawa Tomoo , Murata Ichiro
Published: July 2006

[2.2]Metacyclo(1,3)azulenophane (4) has been synthesized in two steps from azulyl-1,3-bis(trimethylammonium) diiodide (1). The cyclophane 4 could be converted to the novel nonalternant hydrocarbon, azuleno[1,2,3-cd]phenalene (6), through the transannular coupling followed by dehydrogenation sequence. Some properties of 4 are also reported.
A NEW METHOD FOR THE SYNTHESIS OF β-GLUCOSIDES USING 2-CHLORO-3,5-DINITROPYRIDINE
Authors: Shoda Shin-ichiro , Mukaiyama Teruaki
Published: July 2006

The reaction of 3,5-dinitro-2-pyridyl α-glucopyranoside, readily derived from 1α-hydroxysugar and 2-chloro-3,5-dinitropyridine, with alcohols proceeded smoothly in the presence of a Lewis acid to afford the corresponding β-glucosides in good yields.
SYNTHESIS AND PROPERTIES OF MIXED-LIGAND RUTHENIUM(II) COMPLEXES CONTAINING 2-(2-PYRIDYL)-BENZIMIDAZOLE AND RELATED LIGANDS
Authors: Haga Masa-aki , Tanaka Toshio
Published: July 2006

Mixed-ligand ruthenium(II) complexes of the [Ru(bpy)2L]n+(ClO4)n type, where bpy= 2,2′-bipyridine; L= 2-(2-pyridyl)-benzimidazole (PBImH) when n= 2, and L= 2-(2-pyridyl)-benzimidazolate (PBIm) and 2-(o-hydroxyphenyl)-benzimidazole (OBImH) when n= 1, were prepared. Anodic peak potentials and ruthenium-to-bipyridine charge transfer bands of these complexes are rationalized in terms of the donor ability of L.
HEXAFLUOROACETYLACETONATOBIS(ETHYLENEDIAMINE)COBALT(III) PERCHLORATE, REVERSIBLE CHANGES OF ITS ABSORPTION AND ROTATION WITH ACID AND BASE
Authors: Kuroda Kashiro
Published: July 2006

Hexafluoroacetylacetonatobis(ethylenediamine)cobalt(III) perchlorate, [Co(hfac)(en)2] (ClO4)2 has been prepared and resolved. It has been found that reversible changes in absorption and rotation occur with the variation of the pH of the solution. It has been considered from the facts that the deprotonation of the methylidyne group in hfac may be accompanied with a variation in the electronic state and the steric distribution of the electron density in the chelate ring.
CONVENIENT PROCEDURES FOR CONVERSION OF CARBONYL COMPOUNDS TO gem-DIFLUOROOLEFINS AND THEIR SELECTIVE REDUCTIONS TO MONOFLUOROOLEFINS
Authors: Hayashi Sei-ichi , Nakai Takeshi , Ishikawa Nobuo , Burton Donald J , Naae Douglas G , Kesling H S
Published: July 2006

The in situ reaction of dibromodifluoromethane, triphenylphosphine, and aldehydes in the presence of zinc dust affords good yields of gem-difiuoroolefins. Reduction of the difluoroolefins gives selectively the corresponding monofluoro-olefins in excellent yields. The scope and limitation of these procedures are described and compared with those of previous methods.
EFFECT OF ELECTRONIC STRUCTURE AND TOLERANCE FACTOR ON CO OXIDATION ACTIVITY OF PEROVSKITE OXIDES
Authors: Shimizu Takashi
Published: July 2006

CO oxidation was studied over perovskite-type compounds which were prepared by a conventional ceramic method. Catalytic activity strongly correlates both with the electronic state and the binding energy of transition metal in accordance with a tolerance factor of the perovskite structure.
PROMOTED DIMERIZATION OF α-METHYLSTYRENE BY 3,5-DIMETHOXY-SUBSTITUENTS
Authors: Schmitt Bertram , Birr Christian
Published: July 2006

3,5-Dimethoxy-α-methylstyrene, which originates from acidic cleavage of the 3,5-dimethoxy-α,α-dimethyl-benzyl-oxycarbonyl residue, an amino protecting group in peptide synthesis, easily dimerizes in solution to 1,3,3-trimethyl-1-(3,5-dimethoxy)-phenyl-5,7-dimethoxyindan in the presence of trifluoroacetic aciEd.
RESONANCE RAMAN SPECTRA OF ALL-TRANS AND 15,15′-CIS-β,β-CAROTENES
Authors: Saito Shigeki , Harada Issei , Tasumi Mitsuo , Eugster C H
Published: July 2006

The Raman spectra of all-trans and 15,15′-cis-β,β-carotenes were observed using various laser lines for excitation. Differences, not dramatic but significant, were found between the spectra of the two isomers. With ultraviolet excitations both isomers gave a few bands in the C=C stretching region, whereas a single band was observed with visible excitations.
β-CYCLODEXTRIN PHOSPHATE. A REMARKABLE CATALYST FOR THE IODINE OXIDATION OF BENZYL METHYL SULFIDE TO THE SULFOXIDE IN WATER
Authors: Eiki Toshio , Tagaki Waichiro
Published: July 2006

β-Cyclodextrin phosphate has been found to be a remarkable catalyst for the iodine oxidation of benzyl methyl sulfide to the sulfoxide in water.
A FACILE METHOD FOR REGIOSELECTIVE 1,2-CARBONYL TRANSPOSITION OF Δ2-CYCLOHEXENONE SYSTEMS LEADING TO THE POSITIONALLY ISOMERIC Δ2-CYCLOHEXENONES
Authors: Mimura Tetsuya , Nakai Takeshi
Published: July 2006

A new, facile procedure is described which allows the regioselective 1,2-carbonyl transposition of Δ2-cyclohexenone systems leading to the positionally isomeric Δ2 -cyclohexenones. The scope and limitation of the method is presented.
SYNTHESIS OF 2H-CHROMENO[2,3-d]PYRIMIDINE-2,4(3H)-DIONES (5-DEAZA-10-OXAFLAVINS) AS AN AUTORECYCLING OXIDIZING AGENT
Authors: Yoneda Fumio , Hirayama Ryoichi , Yamashita Machiko
Published: July 2006

Treatment of 3-methyl-6-phenoxyuracils with the Vilsmeier reagent gave the corresponding 5-formyl-3-methyl-6-phenoxyuracils. Dehydrative cyclization of the above 5-formyluracils with polyphosphoric acid gave 3-methyl-2H-chromeno[2,3-d]pyrimidine-2,4(3H)-diones (3-methyl-5-deaza-10-oxaflavins). These 5-deaza-10-oxaflavins showed strong oxidizing power in oxidizing benzyl alcohol even under neutral conditions to give benzaldehyde, while they were hydrogenated to 1,5-dihydro-5-deaza-10-oxaflavins.
A NEW CATALYTIC DETERMINATION OF COPPER(II) BY MEANS OF THE OXIDATIVE COUPLING REACTION OF p-HYDRAZINOBENZENE-SULFONIC ACID WITH m-PHENYLENEDIAMINE
Authors: Nakano Shigenori , Enoki Hitomi , Kawashima Takuji
Published: July 2006

A new sensitive catalytic method for the determination of copper(II) is proposed. In the presence of hydrogen peroxide, copper(II) catalyzes the oxidation of p-hydrazinobenzenesulfonic acid to p-sulfobenzenediazonium ion, which is coupled with m-phenylenediamine to form a yellow azo dye (λmax=454 nm). By means of this catalytic reaction, nanogram amounts of copper(II) can be determined easily.
CATION ORDERING IN 8-LAYER Ba2(CrTa)O6
Authors: Torii Yasuyoshi , Kawamura Sukezo , Kurokawa Riichi
Published: July 2006

The structure of the title compound has been determined from powder X-ray diffraction data and found to be much the same as in 8-layer Ba4(LiNb3)O12. Only the Cr3+ ions occupy the face-shared octahedra, while the Ta5+ ions occupy the corner-shared octahedra.
COMPLEX FORMING BEHAVIOR OF BIS(BENZOCROWN ETHER)S LINKED BY POLY(OXYETHYLENE) CHAIN AND 4′-ALKOXYBENZOCROWN ETHERS
Authors: Wada Fumio , Wada Yoshiko , Goto Tokio , Kikukawa Kiyoshi , Matsuda Tsutomu
Published: July 2006

New bis(benzocrown ether)s linked by various length of poly(oxyethylene) chain, –OCH2(CH2OCH2)mCH2O–; m = 1 – 4, shows much increased extractability and selectivity to larger cations than the hole size of the crown ether ring in the extraction of alkali metal picrates. The spectra of the bis(benzo-18-crown-6) complexes in THF suggested the existence of more complex ionic species than those of bis(benzo-15-crown-5) series.
A NEW ROUTE TO PERFLUOROBICYCLIC ETHERS. AN UNUSUAL FLUORINATION PRODUCT FROM CYCLOHEXEN-2-YL-SUBSTITUTED CARBOXYLIC ACID ESTERS
Authors: Abe Takashi , Hayashi Eiji , Baba Hajime , Nagase Shunji
Published: July 2006

The electrochemical fluorination of methyl cyclohexen-2-ylbutyrate (1) afforded perfluoro(8-methoxy-9-ethyl-7-oxabicyclo[4.3.0]nonane) (1b) together with perfluoro(9-ethyl-7-oxabicyclo[4.3.0]nonane) (1a) as the cyclization product in a fair yield. The compound 1b having an acetal structure was confirmed by its spectral data and also by examining the chlorination products which were obtained by the reaction of 1b with anhydrous aluminum chloride.
STRUCTURE AND SYNTHESIS OF AVENIC ACID B, A NEW AMINO ACID POSSESSING AN IRON CHELATING ACTIVITY
Authors: Fushiya Shinji , Sato Yoshikazu , Nozoe Shigeo
Published: July 2006

A new amino acid derivative possessing an iron chelating activity was isolated from an ethanol extract from the roots of Avena sativa. The structure of this compound, avenic acid B, has been determined as 2(S),3’(S)-N-(3-hydroxy-3-carboxypropyl)-homoserine (1) on the basis of nmr analysis and by chemical synthesis.
AMIJIOL, ISOAMIJIOL, AND 14-DEOXYAMIJIOL, THREE NEW DITERPENOIDS FROM THE BROWN SEAWEED DICTYOTA LINEARIS
Authors: Ochi Masamitsu , Watanabe Masanori , Miura Iwao , Taniguchi Makoto , Tokoroyama Takashi
Published: July 2006

Three new diterpenoids have been isolated from the brown seaweed Dictyota linearis, and their structures determined by 1H and 13C NMR spectroscopy.
3,5-DIAMINO-1,2-DITHIOLIUM TCNQ RADICAL ANION SALTS. PREPARATION AND ELECTRICAL PROPERTIES
Authors: Yumoto Yoshiji , Tanaka Toshio
Published: July 2006

Some simple and complex salts of 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion with 3,5-diamino-l,2-dithiolium cations, (Remark: Graphics omitted.)(R=H, Et, and CH2C6H5), were prepared. The complex salts as polycrystalline samples exhibit the resistivity of 3.0–9.8 ω cm with very low activation energies (0.023–0.075 eV), Electronic spectra and magnetic properties of these salts are discussed.
UNUSUAL REDUCTIVE CONDENSATIONS IN THE REACTION OF DIIODODIMETHYLSILANE WITH KETONES
Authors: Ando Wataru , Ikeno Masayuki
Published: July 2006

Diiododimethylsilane reacts with various ketones in the presence of zinc to give the corresponding reductive condensation products in good yields.
SYNTHESIS OF (±)-α-AMBRINOL
Authors: Takazawa Osamu , Tamura Hiroshi , Kogami Kunio , Hayashi Kazuo
Published: July 2006

Synthesis of α-ambrinol was successfully accomplished by cyclization of dihydro-γ-ionone ethylene acetal which was prepared by the titanium(IV)-promoted reaction of 3,3-dimethyl-1-trimethylsiloxycyclohexene with methyl vinyl ketone ethylene acetal followed by exo-methylenation with triphenylphosphonium methylide.
RELATION BETWEEN ELECTRICAL CONDUCTIVITY AND THERMAL DESORPTION SPECTRA FOR COBALT PHTHALOCYANINE-OXIDATIVE GAS SYSTEM
Authors: Sadaoka Yoshihiko , Sakai Yoshiro , Yamazoe Noboru , Seiyama Tetsuro
Published: July 2006

In the thermal desorption spectra of β-CoPc–NO2 system two peaks appeared. The first and second peaks were assigned to the desorption of the NO2 on the pseudoaromatic rings and on the Co ions, respectively. The electrical conductance was enhanced mainly by the interaction of the pseudoaromatic ring with NO2.
SPECIFIC WEAK INTERACTIONS RELATED TO GEOMETRICAL SHAPE OF ASSOCIATING THIOLS: THE FACTOR RESPONSIBLE FOR SELECTIVE MOLECULAR RECOGNITION IN THEIR OXIDATION
Authors: Endo Tadashi , Takeda Yukiko , Orii Toyohiko , Murata Tomoji , Sakai Miyuki , Nakagawa Naoya , Nikki Kunio
Published: July 2006

In oxidation of a pair of associating thiols (1d and 2) with O2, specific weak interactions related to their geometrical shape such as CH···N and CH···SH interactions are suggested to be responsible for selective molecular recognition.
DIMERIZATION OF α-METHYLSTYRENE BY BINARY SOLID ACIDS
Authors: Kawakami Yuhsuke , Toyoshima Nobuyuki , Yamashita Yuya
Published: July 2006

Binary solid acids catalyze the dimerization of α-methylstyrene. The linear isomers are principal products among the reaction products.
TOTAL SYNTHESIS OF (±)-AVENACIOLIDE AND ITS ANALOGUES
Authors: Takei Hisashi , Fukuda Yoshimasa , Taguchi Takeo , Kawara Tatsuo , Mizutani Hidemi , Mukuta Takashi
Published: July 2006

A new method for the stereoselective synthesis of (±)-avenaciolide and its analogues via methoxycarbonyl- or anisyloxycarbonyldi-γ-lactones, which could be easily prepared by the reaction of γ-substituted α-bromobutenolides with sodium salt of methyl or anisyl malonamate in good yields, was described.
OXIDATIVE CYCLODIMERIZATION OF N,N-DIMETHYLANILINES A NOVEL CARBON–CARBON BOND FORMATION BY PALLADIUM(II) ACETATE
Authors: Sakakibara Tsutomu , Matsuyama Haruhiko
Published: July 2006

The reaction of N,N-dimethylanilines p-substituted by electron-donating groups with palladium(II) acetate in a mixed solvent of benzene and acetic acid gave cyclodimerized products, i.e. 5,6,11,12-tetrahydrodibenzo[b,f][1,5]diazocine derivatives in good yields, via novel C–C bond formation, along with small amount of acetoxylated or demethylated products. Radical cation species was suggested as a cyclodimerization intermediate.
ISOLATION AND X-RAY MOLECULAR STRUCTURE ANALYSIS OF (C6H5O)2P(OC6H4)Mn·(CO)2{P(OC6H5)3}2 FROM R3Sn–Mn(CO)3{P(OC6H5)3}2 (R = CH3 and C2H5) BY PHOTOCHEMICALLY INDUCED ORTHOMETALATION REACTION
Authors: Onaka Satoru , Kondo Yoshinori , Furuichi Nobuhiro , Toriumi Koshio
Published: July 2006

Photochemical reactions of the title compounds afforded an air-stable colorless crystalline compound in low yield. The product was characterized as an orthometalated manganese triphenylphosphite derivative by elemental analyses and an X-ray diffraction technique. Its crystal structure is described.
DEOXYGENATION REACTION OF NITROBENZENE WITH CARBON CATALYZED BY POTASSIUM CARBONATE
Authors: Konishi Hisatoshi , Kasamatsu Yuji , Nanjo Satoru , Okano Tamon , Kiji Jitsuo
Published: July 2006

Nitrobenzene was deoxygenated by carbon to give azobenzene. Impregnation of K2CO3 on the carbon markedly lowered the temperature required for the reaction. The catalytic activity of K2CO3 was correlated to the oxidation behavior of the carbon observed by TGA and DTA in air.
FACILE SUBSTITUTION REACTION BETWEEN NONACTIVATED ARYL IODIDES AND ARENETHIOLATES IN THE PRESENCE OF COPPER(I) IODIDE
Authors: Suzuki Hitomi , Abe Hisako , Osuka Atsuhiro
Published: July 2006

In hexamethylphosphoric triamide containing copper (I) iodide, nonactivated aryl iodides undergo a facile nucleophilic attack by arenethiolate ions to give the corresponding aryl sulfides in good yields.
A TEMPERATURE-JUMP STUDY OF INCLUSION REACTIONS OF m- AND p-NITROPHENYLAZOSALICYLIC ACID WITH α-CYCLODEXTRIN IN AQUEOUS SOLUTIONS
Authors: Yoshida Noboru , Fujimoto Masatoshi
Published: July 2006

Inclusion reactions of the title compounds with α-cyclodextrin were studied in aqueous solution by means of a temperature-jump method. The rate constants for inclusion reactions were found to be in the order of magnitude 106–107 mol−1 dm3 s−1.
SYNTHESIS AND REACTION OF 6,7-DIHYDROAZIRINO[1,2-a]THIENO[2,3-d] PYRIDIN-8-ONE
Authors: Satake Kyosuke , Kimura Masaru , Morosawa Shiro
Published: July 2006

6,7-Dihydroazirino[1 ,2-a]thieno[2,3-d]pyridin-8-one 7 was synthesized and its base-catalyzed ring-opening leading to 4,5-dihydro-8H-thieno[3,2-c]azepin-8-one 8 was studied.
ENHANCEMENT OF PHOTOCURRENT AT A MEROCYANINE-COATED ELECTRODE DUE TO CHROMOPHORE AGGREGATION
Authors: Iriyama Keiji , Mizutani Fumio , Yoshiura Masahiko
Published: July 2006

Remarkable absorption spectral change and enhancement of photocurrent due to chromophore aggregation have been achieved by treating a cast film of a new surface-active and photo-active merocyanine dye on an optically transparent SnO2 electrode with an alkaline aqueous solution.
CESIUM FLUORIDE PROMOTES SYNTHESIS OF RIBOOLIGONUCLEOTIDES VIA PHOSPHOTRIESTER APPROACH
Authors: Takaku Hiroshi , Nomoto Tadaaki , Murata Mitsuho , Hata Tsujiaki
Published: July 2006

In the presence of cesium fluoride, the reactions of a fully protected 5′-O-dimethoxytrityl-2′-O-tetrahydropyranyl-N-acylnucleoside 3′-(4-chlorophenyl, 5-chloro-8-quinolyl) phosphates with 5′-hydroxyl nucleosides proceeded rapidly under mild conditions to afford the corresponding ribodinucleoside monophosphates in good yields.
STEREOCHEMISTRY OF SULFOXIDES BY ENZYMATIC OXYGENATION OF SULFIDES WITH RABBIT LIVER MICROSOMAL CYTOCHROME P-450
Authors: Takata Toshikazu , Yamazaki Mayumi , Fujimori Ken , Kim Yong Hae , Oae Shigeru , Iyanagi Takashi
Published: July 2006

Asymmetric induction and diastereomeric ratio in the enzymatic oxygenation of various sulfides to the corresponding sulfoxides with hepatic mirosomal cytochrome P-450 obtained from phenobarbital pretreated rabbit were investigated in comparison with those of nonenzymatic oxidation with m-chloroperbenzoic acid and sodium metaperiodate. While substantial asymmetric inductions were observed in the sulfoxides formed by the enzymattc oxygenations, diastereomeric ratios of the sutfoxides formed were also quite different from those obtained by oxidation with m-chloroperbenzoic acid and sodium metaperiodate.
SELECTIVE PERMEATION OF CARBON DIOXIDE THROUGH CELLULOSE NITRATE/POLYETHYLENE GLYCOL BLEND MEMBRANES
Authors: Kawakami Mitsuyasu , Iwanaga Hideaki , Kagawa Shuichi
Published: July 2006

Permeabilities for N2, O2, and CO2 through cellulose nitrate/polyethylene glycol blend membranes were determined as a function of film composition. Not only the permeability but the permselectivity for CO2 increased with an increase in the fraction of polyethylene glycol. It was suggested that the intermolecular force induced by polar groups in the film and the role of polyethylene glycol as a plasticizer may be responsible for such a behavior for CO2.
STRUCTURE OF RISHITINONE, A STRESS METABOLITE FROM DISEASED POTATO TUBERS
Authors: Katsui Nobukatsu , Yagihashi Fujio , Murai Akio , Masamune Tadashi
Published: July 2006

Structure and configuration of rishitinone, a stress metabolite isolated from diseased potato tubers, was determined to be formula 1 on the basis of the chemical and spectral evidence.
(+)-β-FRULLANOLIDE AND (+)-BROTHENOLIDE, TWO NEW SESQUITERPENE LACTONES FROM THE LIVERWORT FRULLANIA BROTHERI STEPH.
Authors: Takeda Reiji , Ohta Yoshimoto , Hirose Yoshio
Published: July 2006

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 > 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

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

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

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

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

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

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

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

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

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

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

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

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

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.
POTASSIUM FLUORIDE ON ALUMINA AS BASE FOR CROWN ETHER SYNTHESIS
Authors: Yamawaki Junko , Ando Takashi
Published: July 2006

Alumina coated with potassium fluoride was found to be an effective and practical reagent for the synthesis of some simple crown ethers.
VIBRATIONAL RELAXATION IN THE LOWEST SINGLET EXCITED STATE OF PYRAZINE
Authors: Igarashi Hisao , Kaya Koji
Published: July 2006

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

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

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

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

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

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

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

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

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.
ASYMMETRIC SYNTHESIS OF β-SUBSTITUTED γ-BUTYROLACTONES
Authors: Mukaiyama Teruaki , Fujimoto Katsumi , Hirose Takuji , Takeda Takeshi
Published: July 2006

Highly optically pure β-substituted γ-butyrolactones (V) were obtained in good yields by the reaction of (E)-(2R,3S)-6-alkylidene-3,4-dimethyl-2-phenylperhydro-1,4-oxazepine-5,7-dione (I) with phenylthiomethyllithium, followed by i) treatment with trimethyloxonium tetrafluoroborate and ii) acid hydrolysis.
REACTIONS OF LIGATING DINITROGEN WITH ALCOHOLS OR METAL HYDRIDES
Authors: Hidai asanobu , Takahashi Tamotsu , Yokotake Ichiro , Uchida Yasuzo
Published: July 2006

Treatment of cis-[W(N2)2(PMe2Ph)4] with 2-propanol/KOH yields hydrazine, whereas use of n-alcohols instead of 2-propanol gives ammonia as a main nitrogen hydride. Metal hydrides such as [(η5-C5H5)2ZrHCl], [H2Fe(CO)4] and [NaAlH2(OCH2CH2OCH3)2] also react with the above dinitrogen complex to give ammonia in moderate yield.
SYNTHESIS OF OXAZOLO- AND IMIDAZOLO-PHANES
Authors: Beccalli Egle M , Majori Luisella , Marchesini Alessandro , Torricelli Clara
Published: July 2006

Irradiation of (3, 5)[9]isoxazolophanes (I) afforded the corresponding azabicyclo [1O.1.O]tridec-13(1)-en-11-ones (II) from which the [9]oxazolo- (III) and the [9]imidazolo-phanes (V) were obtained.
REACTION OF SULFENAMIDES WITH DI-ALKYL AND TRIALKYL PHOSPHITES.AN EFFICIENT SYNTHESIS OF PHOSPHORAMIDATES BY UNUSUAL SUBSTITUTION AT S–N BOND IN (2-BENZOTHIAZOLYL)SULFENAMIDES
Authors: Torii Sigeru , Sayo Noboru , Tanaka Hideo
Published: July 2006

Regioselective attack of the trivalent phosphorus atom of dialkyl and trialkyl phosphites on either nitrogen or sulfur atom of sulfenamides has been found. The reaction of phenylsulfenamides with dialkyl phosphites yielded phosphorothiolates, whereas the treatment of (2-benzothiazolyl)sulfenamides with dialkyl and trialkyl phosphites gave phosphoramidates in excellent yields.
FERMI RESONANCE BETWEEN METHYL TORSIONAL AND SKELETAL BENDING EXCITED STATES OF ETHYL FLUORIDE BY MICROWAVE SPECTRA
Authors: Shiki Yoshiko , Yamaoka Fujiko , Hayashi Michiro
Published: July 2006

Microwave spectra of ethyl fluoride and its deuterated species were measured in the ground, methyl torsional and skeletal bending excited states. Fermi resonance between the second excited methyl torsional state and the first excited skeletal bending state was analyzed in relation to the methyl internal rotation.
α-DIALKYLAMINOALKYLNITRILES: PRACTICAL REAGENTS FOR NUCLEOPHILIC ACYLATION
Authors: Reutrakul Vichai , Ratananukul Piniti , Nimgirawath Surachai
Published: July 2006

An efficient synthesis of α-hydroxyketones from the reaction of carbonyl compounds and lithio α-dialkylaminoalkylnitriles is described.
A NOVEL RING CLOSURE REACTION BETWEEN 1,4-DIHYDROXYANTHRAQUINONE AND ETHYLENEDIAMINE PROMOTED BY COPPER IONS
Authors: Matsuoka Masaru , Makino Yoshinobu , Takei Toshio , Kitao Teijiro
Published: July 2006

The reaction of 1,4-dihydroxyanthraquinone with ethylenediamine in the presence of Cu(I)Cl or Cu(II)Cl2 gave 6-hydroxy-1,2,3,4-tetrahydronaphtho- (2, 3-f) -quinoxaline- 7,12-dione in quantitative yield at ambient temperature. The reaction was promoted greatly by copper ions. The possible mechanism and the role of copper ions were discussed.
A NEW METHOD FOR DETERMINATION OF COMPLEX STABILITY CONSTANT BY ISOTACHOPHORESIS
Authors: Kiso Yoshiyuki , Hirokawa Takeshi
Published: July 2006

A method for the isotachophoretic determination of stability constant was examined by a computor analysis of the observed isotachopherograms. The obtained values for acetate complexes with Ba, Ca, Zn, Cd, Cu and Ca-tartrate complex were compared with those obtained by the other methods and discussed. The present method is applicable even for mixed samples.
OXIDATION OF ALDEHYDES BY THIAZOLIUM IONS AND FLAVIN IN A CATIONIC MICELLE
Authors: Yano Yumihiko , Hoshino Yutaka , Tagaki Waichiro
Published: July 2006

The reactions of aldehydes with thiazolium ions and flavin were investigated in the presence of CTABr micelle. The reactions were found to be facilitated by a cationic micelle.
SYNTHESIS OF ANTHRACYCLINONES VIA o-QUINODIMETHANES
Authors: Fariña Francisco , Primo Jaime , Torres Tomás
Published: July 2006

The preparation of several key intermediates in the synthesis of anthracyclinones is described. The key step in the construction of the C ring of the tetracyclic system involves a Diels-Alder reaction with an appropriate o-quino-dimethane.
CORRELATION PHOTOACOUSTICS
Authors: Kato Kenji , Ishino Shoichi , Sugitani Yoshinori
Published: July 2006

Cross correlation between the pseudo-random excitation signal and the resultant photoacoustic signal were recorded as a function of delay time τ. The correlation spectra showed peaks of transient phenomenon of heat generation for carbon black sample. This technique was found possible to observe the photoacoustic spectra at optionaly delayed time for spinach leaf sample.
DECOMPOSITION OF PCB′s IN A HYDROGEN GLOW DISCHARGE PLASMA
Authors: Hiraoka Kenzo , Nakamura Teruo , Matsunaga Kazumasa
Published: July 2006

A study was made on the decomposition of PCB’s in a radio-frequency glow discharge plasma of hydrogen. PCB’s were completely decomposed in a plasma of hydrogen at 1 Torr. Major gaseous products were ethane, isgbutane, and several higher hydrocarbons were recognized as minor products. Almost all of chlorine in PCB’s was converted to hydrogen chloride.
UNUSUAL DISPROPORTIONATION ENCOUNTERED IN THE ALUMINA-CATALYZED DEHYDRATION OF 4-(α-HYDROXYETHYL) PHENOLS
Authors: Kamogawa Hiroyoshi , Watanabe Motoshi , Oka Sachiyo , Nanasawa Masato
Published: July 2006

Alumina-catalyzed dehydrations of 4-(α-hydroxyethyl)phenols provided unusual disproportionation products: 4-ethylphenols and 4-acetylphenols and their tautomers.