bluuebunny/crossref_metadata_2025_split huggingface dataset:
CATALYTIC ACTIVITIES OF ALKALINE EARTH METAL OXIDES FOR ISOMERIZATIONS OF 2-PINENE AND 2(10)-PINENE
Authors: Ohnishi Ryuichiro , Tanabe Kozo 
Published: July 2006

Abstract
The isomerization of 2-pinene or 2(10)-pinene over evacuated MgO, CaO, SrO and BaO catalysts was carried out at room temperature or 150°C. All catalysts were found to exhibit extremely high selectivities for the formation of 2(10)-pinene or 2-pinene. The highest activity was observed over SrO, where the isomerization took place at room temperature and attained its equilibrium in only 15 min.
THE ELECTRODE REACTION OF HEXAAMMINECHROMIUM(III) IN THE PRESENCE OF ETHYLENEDIAMINETETRAACETATE AND NITRATE IONS
Authors: Tanaka Nobuyuki , Kano Taisaku , Yamada Akifumi 
Published: July 2006

Abstract
It has been confirmed experimentally that Cr(NH3)63+ gives a catalytic wave on its polarogram in the presence of EDTA and NO3− ions according to the EC(C′E′)n type mechanism; Cr(NH3)62+ which is produced on the electrode surface by the electrochemical reaction reacts with EDTA rapidly to form Cr(II)-EDTA (denoted as EC), which in turn gives a catalytic wave in the presence of NO3− ions (denoted as (C′E′)n). In addition, it was suggested that the reduction intermediates of nitrate ion oxidize Cr(H2O)p(NH3)6−p2+ at an appreciable rate, which nitrate ion itself does not.
THE CHARGE-TRANSFER INTERACTION AND SUCCESSIVE THERMAL (2+2)CYCLOADDITION OF α,β-UNSATURATED ETHERS WITH TETRACYANOETHYLENE
Authors: Arimoto Tateo , Osugi Jiro 
Published: July 2006

Abstract
An equilibrium study on the formation of 1:1 α,β-unsaturated ether-tetracyanoethylene complexes, and a kinetic study on the successive (2+2) cycloaddition reaction were made in CHCl3 and CCl4 in the temperature range 10–40°C by the spectrophotometric method. The behavior of the charge–transfer complexes in the initial process of this reaction was considered.
REACTION OF o-BENZOQUINONE MONO-IMINE WITH o-AMINOPHENOL
Authors: Hishida Tadanori , Nogami Takashi , Shirota Yasuhiko , Mikawa Hiroshi 
Published: July 2006

Abstract
o-Benzoquinone mono-imine was obtained for the first time in ether solution by oxidizing o-aminophenol with lead dioxide. The reaction of o-benzoquinone mono-imine with o-aminophenol was studied spectrophotometrically, and 2-aminophenoxazone was found to be formed as the reaction product. It is suggested that 2-aminophenoxazone is produced by cyclization reaction of the intermediate 2-amino-o-indophenol.
A NEW HEXACYCLIC TETRANORTRITERPENOID
Authors: Pachapurkar R V , Kornule P M , Narayana C R 
Published: July 2006

Abstract
Vilasinin, a new hexacyclic tetranortriterpenoid has been isolated from the green leaves of the neem tree and its structure determined. It appears to be a biogenetic precursor of salanin and nimbin.
A NEW SYNTHETIC METHOD FOR γ-SUBSTITUTED Δα,β-BUTENOLIDES
Authors: Iwai Kiyoshi , Kawai Mikio , Kosugi Hiroshi , Uda Hisashi 
Published: July 2006

Abstract
Reaction of the dilithio derivative of phenylthioacetic acid with terminal epoxides gave γ-substituted α-phenylthio-γ-butyrolactones, which were oxidized to sulfoxides and then pyrolyzed to give γ-substituted Δα,β-butenolides in moderate overall yields.
DRAG COEFFICIENTS OF BURNING POLYMER SPHERES DURING FREE FALLING AT ELEVATED PRESSURES
Authors: Saito Takeo , Iwama Akira 
Published: July 2006

Abstract
Photographical studies were made of the burning phenomena of carboxyl terminated polybutadiene (CTPB) and polyurethane (PU) spheres during free falling in pressurized oxidizing atmospheres (5–30kg/cm2). Both of polymeric fuel spheres yielded several times as large drag coefficients as non-burning standard solid spheres.
AN OXYGEN ADDUCT OF POLY-4-VINYLPYRIDINE-BOUND TRICHLOROTITAN1UM(III)
Authors: Chimura Yasuo 
Published: July 2006

Abstract
E.s.r. spectroscopic studies indicate the formation of a novel oxygen adduct of poly-4-vinylpyridine-bound TiCl3, whose electronic structure should be formally described as Ti(IV)–O2−.
MAGNETIC SUSCEPTIBILITY OF TRIS(2,2′-DIPYRIDYL)MANGANESE COMPLEXES HAVING AN ANOMALOUS VALENCY OF MANGANESE
Authors: Hara Ken-ichi , Inoue Motomichi , Horiba Tatsuo , Kubo Masaji 
Published: July 2006

Abstract
The magnetic susceptibility of tris(2,2′-dipyridyl)manganese complexes, [Mn(dipy)3] · 2THF and Li[Mn(dipy)3] · 4THF (THF: tetrahydrofuran), has been determined over a temperature range of 1.5–300 K. The susceptibility of Li[Mn(dipy)3] · 4THF can be explained with a radical ion model, in which three 2,2′-dipyridyl radical ions are coordinated to a manganese(II) ion, suggesting the formula [Mn2+(dipy−)3]− rather than [Mn−(dipy0)3]−. A similar model is applicable to [Mn(dipy)3] · 2THF as well.
3-ACYL-1,2-NAPHTHOQUINOLS FROM THE PHOTO-INDUCED REACTION OF 1,2-NAPHTHOQUINONE DERIVATIVES WITH ALIPHATIC ALDEHYDES
Authors: Maruyama Kazuhiro , Takuwa Akio 
Published: July 2006

Abstract
3-Acyl-1,2-naphthoquinols and 1,2-naphthoquinol monoacylesters were produced in the photochemical reactions of 1,2-naphthoquinones with a variety of aliphatic aldehydes. From the photochemical reactions of 3-halogeno-1,2-naphthoquinones with aliphatic aldehydes were obtained also 3-acyl-1,2-naphthoquinols; that is, the same products with those from the photochemical reactions of 1,2-naphthoquinone with aliphatic aldehydes, accompanying with 3-halogeno-1,2-naphthoquinol. monoacylesters.
ADDITION OF HYDROGEN CYANIDE TO 2,3-DIPHENYL-5,6-DIHYDROPYRAZINE: A LITERATURE CORRECTION
Authors: Walia Jasjit Singh 
Published: July 2006

Abstract
The structure of the product of reaction of 2,3-diphenyl-5,6-dihydropyrazine (1) with potassium cyanide and glacial acetic acid is established to be 2,3-dicyano-2,3-diphenyl-hexahydropyrazine (3) rather than the reported N,N′-dicyano-2,3-diphenylhexahydropyrazine (2).
POLYMERIZATION OF 2,3-DIHYDROFURAN DERIVATIVES. VI. ISOTACTIC POLYMER OF 2-METHYLENETETRAHYDROFURAN
Authors: Kamo Bunzo , Sakai Toshiyasu , Sudo Minoru , Inaba Masaharu , Furusawa Shijo 
Published: July 2006

Abstract
The microfine structure of poly(2-methylenetetrahydrofuran) obtained by various cationic catalysts was studied by NMR spectroscopy. Only a quartet was observed for the backbone methylene protons of the ethyl methyl ketone-insoluble polymer, which was found to be crystalline by X-ray analysis. The polymer is suggested to be primarily isotactic in nature.
ORIGIN AND DIRECTION OF NONEQUIVALENT ORBITAL EXTENSION AND STEREOCHEMICAL BEHAVIORS OF PLANE-ASYMMETRIC OLEFINS. EXO-ELECTROPHILIC ADDITION TO NORBORNENE
Authors: Inagaki Satoshi , Fukui Kenichi 
Published: July 2006

Abstract
Origin and direction of nonequivalent extending of orbitals with symmetric density distribution under influence of weakly conjugative entity was considered in a general manner. An application of the obtained results was found to shed new light on exo-stereoselectivity in electrophilic addition to norbornene.
NUCLEAR MAGNETIC RESONANCE STUDY OF EXCHANGING SYSTEMS. VI. ROTATIONAL BARRIER OF FORMANILIDE BY 13C NMR COMPLETE LINE SHAPE ANALYSIS
Authors: Nakanishi Hiroshi , Yamamoto Osamu 
Published: July 2006

Abstract
The complete line shape analysis of temperature-dependent 13C NMR spectra of formanilide in the system where the populations of the isomers change with temperature was performed by a modified Bloch equation method, and the activation parameters of the restricted rotation around amide bond were determined accurately.
SEPARATION OF THE HOMOLOGOUS SERIES OF ALKYLBENZYLDIMETHYLAMMONIUM HALIDES AND ALKYLPYRIDINIUM HALIDES BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
Authors: Muto Giichi , Nakae Atsuo 
Published: July 2006

Abstract
Separations of the homologous series of alkylbenzyldimethylammonium chlorides and alkylpyridinium halides having the alkyl groups of C-10, C-12, C-14, C-16 and C-18 were carried out by high performance liquid chromatography. All components were well resolved and the logarithm of the capacity factor was directly proportional to the alkyl chain length.
PROTON RELAXATION AND THE SYMMETRY OF SPIN FUNCTIONS IN THE AB2 SYSTEM
Authors: Fujiwara Shizuo , Umezawa Yoshio , Arata Yoji , Furuyama Hideichi 
Published: July 2006

Abstract
Proton relaxation for nine aromatic AB2 systems were studied by saturation method. It has been concluded that singlet–triplet transition exists in all the systems examined. Possible mechanisms for this phenomenon were discussed briefly.
FORMATION OF IMINOPHOSPHORANES FROM ANTHRANILS AND TRIPHENYLPHOSPHINE
Authors: Nomura Yujiro , Kikuchi Yasushi , Takeuchi Yoshito 
Published: July 2006

Abstract
It was found chat benz[c]isoxazoles gave (2-acylphenyl)iminotriphenylphosphoranes upon heating with triphenylphosphine in toluene. These iminophosphoranes were considerably stable although they have two reactive groups for the Wittig-type reaction in orthoposition in a molecule. This fact as well as their spectral data suggested the existence of the resonance-stabilized chelate ring.
MÖSSBAUER SPECTROSCOPIC STUDIES OF THE EC-AFTER EFFECT IN 57Co-LABELLED [Co(NH3)6][Fe(CN)6], [Co(NH3)6][Cr(C2O4)3]3H2O, AND [Co(NH3)6][Fe(C2O4)3]3H2O
Authors: Sano Hirotoshi , Ohnuma Toshiaki 
Published: July 2006

Abstract
It has been demonstrated that oxalate ligands of trisoxalatochromate(III) and trisoxalatoferrate(III) complex anions located outside the first coordination sphere of the decayed atom are still involved in the local radiolytic processes initiated by the EC-decay. The yields of 57Fe species found in ferrous charge state were interpreted by using radiolytical data on potassium trisoxalatochromate(III) and trisoxalatoferrate(III).
LIGHT-INDUCED TRITIATION OF AROMATIC COMPOUNDS WITH PROPANETHIOL[S3H]
Authors: Takiguchi Hideki , Yoshida Kunio G , Ouchi Hidenaga , Yoshida Masayuki , Morikawa Naotake , Simamura Osamu 
Published: July 2006

Abstract
The aromatic tritiation induced by irradiation of mixtures of aromatic compounds and propanethiol[S3H] was studied with respect to the tritium distribution in the nucleus and the relative rate of tritiation. A mechanism involving a reaction of an excited aromatic molecule with the thiol is proposed.
TROPENYLATION, DETROPENYLATION AND SCHIFF BASE FORMATION IN THE REACTION OF 3,4,5-TRIMETHOXYANILINE WITH TROPENYLIUM ION
Authors: Tsunetsugu Josuke , Sato Masaru , Ebine Seiji 
Published: July 2006

Abstract
Tropenylation of 3,4,5-trimethoxyaniline (II) with tropenylium ion (I), generated by action of acid on 7-ethoxy-1,3,5-cycloheptatriene, gave C-tropenyl derivative (III) and its Schiff base (VI). Further reaction of (III) with (I) gave not only tropenylation products (IV) and (XI) but also detropenylation product (II). Detropenylation has proved to take place in the presence of acid.
REACTION OF VINYLOXYTIN. A NEW METHOD FOR THE PREPARATION OF β-HYDROXYALKANOATE
Authors: Shimada Eiichiro , Inomata Katsuhiko , Mukaiyama Teruaki 
Published: July 2006

Abstract
It was suggested that vinyloxytin was produced by passing gaseous ketene into a methylene chloride solution of tin alkoxide at low temperature. The vinyloxytin thus formed further reacted with various carbonyl compounds at low temperature in the presence of strong Lewis acid such as TiCl4, or AlCl3 to give the corresponding β-hydroxyalkanoates.
9-METHTLENETRICYCLO[4.3.1.0]DECA-2,4,7-TRIEEE DERIVATIVES
Authors: Murata Ichiro , Nakasuji Kazuhiro , Morita Takamitsu 
Published: July 2006

Abstract
9-Methylenetricyclo[4.3.1.0]deca-2,4,7-triene (3a) and its derivatives possessing electron releasing group such as bis(dimethylamino)- and bis(methylthio)-groups at the exo-methylene carbon atom (3b and 3c) were synthesized from bicyclo[4.3.1]decatetraenyl anion (2). It has been shown that the closed norcaradiene tautomers (3a, 3b and 3c) are preferable to the opened nonafulvene tautomers (4a, 4b, and 4c).
EFFECT OF THE INTRAMOLECULAR HYDROGEN BONDING ON THE ROTATIONAL BARRIERS OF THE C–N BOND IN N,N-DIMETHYLBENZAMIDES
Authors: Hirota Minoru , Todokoro Kazuo 
Published: July 2006

Abstract
The free energies of activation for the restricted rotation around the amide C–N bond has been determined for a series of o-substituted benzamides, and the extraordinarily low barrier in o-hydroxybenzamide is attributed to the effect of the intramolecular hydrogen bond.
CATALYTIC HYDROGEN TRANSFER REACTION ON THE POLYNAPHTHOQUINONE—SYNTHESIS OF ANILINE AND DECOMPOSITION OF HYDROGEN SULFIDE
Authors: Iwasawa Yasuhiro , Ogasawara Sadao 
Published: July 2006

Abstract
Catalytic hydrogen transfers on the polynaphthoquinone are reported. Both the dehydrogenated and the hydrogenated products were simultaneously gained. Nitrobenzene was catalytically reduced to aniline by the hydrogen transfer from substrates in the temperature range 285°–330°C. Hydrogen sulfide chosen as a simple sulfur-containing compound was rapidly decomposed on the polynaphthoquinone in the range 30°–100°C.
ESR STUDIES OF THE SPIN-EXCHANGE INTERACTION AND THE DIMERIC STRUCTURE OF N,N’-BIS(3-NITROSALICYLIDENE)-iso-BUTYLENEDIAMINOCOPPER(II) IN FROZEN NITROETHANE SOLUTIONS
Authors: Chikira Makoto , Isobe Taro 
Published: July 2006

Abstract
The temperature variation of the intensity of ΔM = 2 transitions over the range 4.2 to 1.7 K indicates that the triplet state lies 2.2±0.2 cm−1 above the ground singlet state. The computer simulations of the ESR spectra indicates that the dimeric structure has markedly changed from those of the other quadridentate Schiff base complexes of copper(II) in frozen solutions.
CYCLOADDITION REACTIONS OF CYCLOBUTENE WITH 7,9-DIALKYL-8H-CYCLOPENTA[a]ACENAPHTHYLEN-8-ONES. PHOTOAROMATIZATION AND VALENCE TAUTOMERISM
Authors: Matsumoto Kiyoshi , Uchida Takane , Maruyama Kazuhiro 
Published: July 2006

Abstract
Reactions of 7,9-dimethyl-, 7,9-diethyl-, and 7,9-di-n-propyl-8H-cyclopenta[a]acenaphthylen-8-oneswith dimethyl 1-cyclobutene-l,2-dicarboxylate afforded the corresponding decarbonylated 1:1 adducts, while a similar addition of 7,9-diisopropyl-8H-cyclopenta[a]acenaphthylen-8-one onto the cyclobutene gave a 1:1 adduct. The photoaromatization and valence tautomerization of these adducts were examined.
A NOVEL SULFENYLATION REAGENT. SYNTHESIS AND REACTIONS OF N-(ARYLTHIO)ISATINS
Authors: Furukawa Mitsuru , Suda Tchiaki , Hayashi Seigoro 
Published: July 2006

Abstract
N-(Arylthio)isatins (1) were prepared by treatment of arenesulfenyl chloride with isatin. The compounds 1 reacted with organometallic compounds, thiols, and sodium cyanide to give sulfides (2), disulfides (3), and thiocyanates (4).
ELECTROCHEMICAL PREPARATION OF URICASE-COLLAGEN MEMBRANE
Authors: Suzuki Shuichi , Sonobe Nobuyuki , Karube Isao , Aizawa Masuo 
Published: July 2006

Abstract
The electrochemical entrappment of uricase in the collagen fibril network has been developed. The activities of the uricase-collagen membrane prepared at pH 3.8 and at pH 10.4 were 43% and 20% respectively as was compared with that of the native enzyme.
The temperature dependence and the pH dependence of the activity of the membrane were similar to that of the native uricase, which indicated that the properties of uricase in the membrane remained unchanged in the electrochemical entrappment.
BACKBONE REARRANGEMENT IN DOLABRADIENE
Authors: Kitadani Masayuki , Kabuto Chizuko , Sakai Kunikazu , Yoshikoshi Akira , Kitahara Yoshio 
Published: July 2006

Abstract
Upon heating in formic acid dolabradiene (1) gives a mixture of hydrocarbons. Five backbone rearrangement products isolated from the mixture are assigned to Δ5(10)-8β-rimuene (2), Δ5(10)-rimuene (3), Δ1(10)-rimuene (4), Δ8(9)-pimaradiene (5), and Δ1(10),5-rimutriene (6a), respectively. Their formation mechanisms are also discussed.
SYNTHESIS OF PYRIMIDINE-FUSED 1,4-BENZODIAZEPINES
Authors: Kobayashi Shigeru 
Published: July 2006

Abstract
Synthesis of new pyrimidine-fused 1,4-benzodiazepines (3 and 4) was achieved by heating the corresponding 1,4-benzodiazepines (1) with formamide in the presence of phosphoryl chloride.
ON RADICALS IN GAMMA-IRRADIATED POTASSIUM TRIMETAPHOSPHATE
Authors: Kobayashi Yoshimitsu , Matsuura Niro , Indelli Antonio 
Published: July 2006

Abstract
The single crystal of K3P3O9 was irradiated by gamma-rays at room temperature. The pink colored crystal (absorption maximum at around 500 nm and esr spectrum with g=2.01 and a coupling constant of 36G.) was dissolved in aqueous iodide solutions and the liberated iodine was quantitatively measured. From the product analysis, the initial G values were determined as G(P4+) = G(P6+) = 0.27±0.05 at 20°C.
CATALYTIC HYDROGENATION OF EPOXIDE WITH TRISTRIPHENYLPHOSPHINERHODIUM CHLORIDE
Authors: Mochida Isao , Shirahama Shin-ichi , Fujitsu Hiroshi , Takeshita Kenjiro 
Published: July 2006

Abstract
RhCl(PPh3)3 was found to hydrogenate catalytically butadienemonooxide, which has a double bond adjacent to the epoxide group, whereas it could not alkyl nor aryl epoxide at all. The catalyst also hydrogenated phenylcyclopropane which may have significant π-character in its three-membered ring. The substrate may have to have π-coordination ability to be hydrogenated with RhCl(PPh3)3.
THE CLAISEN REARRANGEMENT PROMOTED BY TITANIUM TETRACHLORIDE
Authors: Narasaka Koichi , Bald Edward , Mukaiyama Teruaki 
Published: July 2006

Abstract
In coexistence with TiCl4 and N-trimethylsilylacetanilide, allyl aryl ethers involving 2-butenyl phenyl ether and 3-methyl-2-butenyl phenyl ether were rearranged under mild conditions to afford allyl phenols in good yields.
ION EXCHANGE BASED ON COMPLEXATION USING A CHELATING AGENT-LOADED RESIN
Authors: Akaiwa Hideo , Kawamoto Hiroshi , Nakata Noriko , Ozeki Yoshishige 
Published: July 2006

Abstract
A chelating agent-loaded resin consisting of an anion exchanger and 8-quinolinol-5-sulfonic acid was prepared and the adsorption behavior of some metal ions was investigated in comparison with that toward a resin containing 8-quinolinol. Results showed that the chelate forming group in the former was effective for preconcentration and separation of divalent transition metals.
ISOTOPE EXCHANGE BY TRIBOCHEMICAL REACTION
Authors: Shirakawa Toshiaki , Shimizu Keisuke , Toi Keio , Ito Tomoyasu 
Published: July 2006

Abstract
Isotope exchange reaction H2 + D2 = 2HD occurs at room temperature tribochemically by vibration of SiC. This reaction, which is distinct from thermal reaction, has an induction period at initial stage and the rate of the reaction increases with increasing vibrating time.
STUDY ON TRIPLET-TRIPLET ENERGY TRANSFER BETWEEN LIKE MOLECULES USING ISOTOPIC MIXTURE
Authors: Inoue Akinori , Ebara Nozomu 
Published: July 2006

Abstract
A novel method is presented to elucidate triplet–triplet energy transfer between like molecules, in which phosphorescence decay is observed for rigid solutions containing both hydrogenated and deuterated organic molecules. It is shown that a critical transfer distance is obtained from the concentration dependence of the phosphorescence decay curves.
NEW SYNTHESIS OF 4-METHYL-2-METHYLAMINO-5-(N-METHYLTHIOCARBAMOYL)THIAZOLE BY THERMAL ISOMERIZATION
Authors: Yamamoto Yuichi , Yoda Reiko , Tamura Chihiro 
Published: July 2006

Abstract
A reaction of 4-methyl-2-methylaminothiazole (I) with methyl isothiocyanate gave 1,3-dimethyl-1-(4-methylthiazol-2-yl)thiourea (IIa), whose structure was established by an X-ray analysis. A thermal isomerization of (IIa) gave 4-methyl-2-methylamino-5-(N-methylthiocarbamoyl)thiazole (IIIa) in a good yield.
1H AND 13C NMR SPECTRA OF TETRAALKYLBORON ATE COMPLEXES. HYDRIDE CHARACTER OF α-HYDROGENS TO BORON
Authors: Yamamoto Yoshinori , Toi Hiroo , Sonoda Akio , Murahashi Schun-Ichi 
Published: July 2006

Abstract
1H and/or 13C NMR spectra of tetraalkylboron ate complexes (1–3) reveal that the α-hydrogens and/or α-carbons to boron are shielded in comparison with those of the corresponding trialkylboranes (4–6). These results indicate the hydride character of α-hydrogens in 1–3.
AN EXPERIMENTAL EVIDENCE FOR CIS ELIMINATION MECHANISM IN THE FORMATION OF A BREDT COMPOUND
Authors: Fujikura Yoshiaki , Inamoto Yoshiaki , Takaishi Naotake , Ikeda Hiroshi , Aigami Koji 
Published: July 2006

Abstract
Dehydrobromination of 3-bromotricyclo[5.3.1.03,8]undecane-2-exo-d (3d) gave almost exclusively the undeuterated Bredt olefin, demonstrating unequivocally a cis elimination mechanism.
STEREOCHEMISTRY OF THE HYDROGENATION OF METHOXYCYCLOHEXANONES OVER PLATINUM METALS. A POLAR GROUP EFFECT IN THE CATALYTIC HYDROGENATION OF A C–O DOUBLE BOND
Authors: Nishimura Shigeo , Katagiri Mamoru , Kunikata Yuzo 
Published: July 2006

Abstract
2- and 4-Methoxycyclohexanones give the alcohols of higher cis/trans ratios than the corresponding methylcyclohexanones in the catalytic hydrogenation over platinum metals. This trend is most clearly seen over iridium and platinum among the six platinum metals. Hydrogenation with platinum gives the alcohols of higher cis/trans ratios in t-butyl alcohol than in other solvents.
REACTION BETWEEN NITROAROMATIC COMPOUNDS AND NITRITE ION IN APROTIC POLAR SOLVENTS
Authors: Kobayashi Michio , Sakai Tamio , Minato Hiroshi 
Published: July 2006

Abstract
In hexamethylphophoramide, 18O-labelled nitrite ion readily exchanged with the nitro group of p-dinitrobenzene at 30°C, whereas the formation of p-nitrophenol by the O-attack of nitrite ion is much slower. p-Nitrochlorobenzene is quickly converted to p-dinitrobenzene by the N-attack of nitrite ion, and p-nitrophenol is the final product. The nitro group of p-nitrobenzonitrile is slowly exchanged with nitrite ion.
DIRECTION OF RING-OPENING OF A THIIRANIUM ION
Authors: Oki Michinori , Nakanishi Waro , Fukunaga Michio , Smith G David , Duax William L , Osawa Yoshio 
Published: July 2006

Abstract
2,2-Dimethyl-1-phenylthiiranium hexachloroantimonate was prepared in sulfur dioxide. The direction of ring-opening of the thiiranium ion was found to differ according to the reaction conditions. The structures of the products were determined by independent synthesis and by X-ray crystallography.
SYNTHESIS OF ENDURACIDIDINE, A COMPONENT AMINO ACID OF ANTIBIOTIC ENDURACIDIN
Authors: Tsuji Shinichi , Kusumoto Shoichi , Shiba Tetsuo 
Published: July 2006

Abstract
Enduracididine (1), a component amino acid of the antibiotic enduracidin, was synthesized starting from l-histidine. Bamberger cleavage of methyl l-histidinate followed by catalytic hydrogenation afforded a mixture of (2S,4R)- and (2S,4S)-2,4,5-triaminopentanoic acid derivatives. Deprotection and guanidination of them yielded 1 of the natural configuration and its diastereoisomer, i.e., the enantiomer of natural alloenduracididine respectively.
MEASUREMENT OF Mo+5 SPECTRA DURING METHANOL OXIDATION
Authors: Niwa Miki , Mizutani Makoto , Murakami Yuichi 
Published: July 2006

Abstract
Oxidation of methanol into formaldehyde on SnO2–MoO3 catalyst proceeds according to the redox mechanism of Mo+5\ightleftharpoonsMo+4.
HIGH STEREOSELECTIVITY IN COBALT(III)-7,7′-Me-sal2en COMPLEX CONTAINING l-PROLINE
Authors: Fujii Yuki , Isago Takashi , Sano Mitsuo 
Published: July 2006

Abstract
A new mixed cobalt(III) complex containing 7,7′-Me-sal2en and l-proline, cis-β-[Co(7,7′-Me-sal2en)(l-pro)], has been prepared from [Co(7,7′-Me-sal2en)] and l-proline in methanol (80%) by air oxidation. The reaction has proceeded stereoselectively to form (−)435-isomer, followed by slow isomerization to form finally (+)435-isomer (100%).
2-(3-METHYLBUTOXY)-1,3-BENZODITHIOLE: A CONVENIENT REAGENT FOR INTRODUCTION OF A CYCLIC DITHIOACETAL FUNCTION INTO 2- OR 3-POSITION OF INDOLES AND PYRROLES
Authors: Nakayama Jyuzo , Imura Mimiko , Hoshino Masamatsu 
Published: July 2006

Abstract
A new reagent, 2-(3-methylbutoxy)-1,3-benzodithiole, could be used to introduce a cyclic dithioacetal function into 2- or 3-position of indoles and pyrroles in almost quantitative yields under mild conditions.
HYDRODIMERIZATION OF ACRYLIC ESTERS BY HALOGENOTRIS(TRIPHENYLPHOSPHINE) COBALT COMPLEXES
Authors: Kanai Hiroyoshi , Okada Mitsuo 
Published: July 2006

Abstract
Acrylic esters were selectively hydrodimerized to adipic esters by halogenotris(triphenylphosphine) cobalt complexes in alcohol. The yield of a hydrodimer based on cobalt exceeded 100% in the presence of zinc. The addition of halides of alkali metals increased the yield.