bluuebunny/crossref_metadata_2025 huggingface dataset:
ENHANCEMENT BY WATER OF THE ACTIVITY OF σ-ARYL PALLADIUMII) CATALYST FOR CODIMERIZATION OF ETHYLENE WITH STYRENE
Authors: Nozima Haruki , Kawata Noboru , Nakamura Yoshiyuki , Maruya Ken-ichi , Mizoroki Tsutomu , Ozaki Atsuma
Published: July 2006

A catalytic amount of water has been found to increase significantly the activity of the catalyst system composed of bis(triphenylphosphine) σ-aryl(halo)palladium(II) and trifluoro boron etherate for the codimerization of ethylene with styrene to give 3-phenyl-1-butene.
A NOVEL NICKEL CATALYST SUPPORTED ON POLYSTYRENE WITH NICKEL–CARBON σ-BOND
Authors: Kawata Noboru , Mizoroki Tsutomu , Ozaki Atsumu , Ohkawara Makoto
Published: July 2006

Nickel complexes bound to polystyrene with nickel-carbon σ-bond were prepared by oxidative addition of halogenated polystyrene to tetrakis(triphenylphosphine)nickel(0). The nickel complex, suspended in toluene solution, exhibits nearly the same activity for ethylene dimerization as that of bis(triphenylphosphine)σ-phenyl(bromo)nickel(II).
SYNTHESES OF 8-CYCLOHEPTATRIENYLHEPTAFULVENYLIUM ION AND ITS 8-METHYL DERIVATIVE
Authors: Kayama Yasutaka , Oda Masaji , Kitahara Yoshio
Published: July 2006

8-Cycloheptatrienylheptafulvenylium ion 2 and its 8-methyl derivative 3 are synthesized. The PKR+ value of 2 is 7.49±0.05, the largest value so far known for hydrocarbon cations. The PKR+ value of 3 is 5.89±0.05.
ISOLATION AND PROPERTIES OF 6,6-DIMETHYLFULVENE 1,4-EPIDIOXIDE
Authors: Harada Nobuyuki , Uda Hisashi , Ueno Hiroshi , Utsumi Shun-ichi
Published: July 2006

The 1,4-epidioxide 1 of 6,6-dimethylfulvene has been isolated and characterized when the sensitized photooxidation of dimethylfulvene was conducted in a concentrated methanolic solution at low temperature, and the thermal isomerizations of 1 to all of the photooxidation products of dimethylfulvene reported previously have been demonstrated.
ACTIVATION OF ACYL GROUPS BY OXADIAZOLINE DERIVATIVES
Authors: Fukuda Hiroyuki , Endo Takeshi , Okawara Makoto
Published: July 2006

New acylation reagents, 4-acetyl-2-phenyl-1,3,4-oxa(thia)diazolin-5-ones(thiones) (IIa-IId), were prepared. The kinetic studies of aminolyses of them show that the acetyl derivatives are 102–107 times as reactive as p-nitrophenyl acetate in the reaction with cyclohexylamine.
CONSPICUOUS EFFECTS DUE TO COMPLEX FORMATION AND CONTACT TERM UPON LANTHANIDE-INDUCED SHIFTS IN 19F NMR OF SOME FLUOROAROMATIC COMPOUNDS
Authors: Ajisaka Katsumi , Kainosho Masatsune , Shigemoto Hiroko , Tori Kazuo , Wolkowski Z W , Yoshimura Yohko
Published: July 2006

Effects of lanthanide shift reagents, Ln(fod)3 and Ln(dpm)3, upon 19F and 1H NMR spectra of 4-fluoroaniline and 2-fluoropyridine have been studied to show that the effects originating from complex formation as well as those due to the contact term upon the induced shifts are sometimes too large to be neglected.
A CONVENIENT METHOD FOR THE SYNTHESES OF BENZYL N-ALKYLCYANOCARBAMATES AND N-MONOALKYLISOTHIOUREAS
Authors: Taguchi Takeo , Sato Yoshinari , Mukaiyama Teruaki
Published: July 2006

A convenient method for the syntheses of benzyl N-alkylcyanocarbamates [III] and N-monoalkylisothioureas [V] have been established. Benzyl N-alkylcyanocarbamates [III] were obtained in high yields by the reactions of the potassium salt of benzyl cyanocarbamate with various alkyl halides. Further, it was found that N-alkyl-S-ethylisothioureas or N-alkyl-S-phenylisothioureas [V] were obtained in good yields by the treatment of the benzyl N-alkylcyanocarbamates [III] thus obtained with ethanethiol or benzenethiol.
THERMAL DECOMPOSITION REACTION OF HALOGENOPENTAAMMINERUTHENIUM(III) COMPLEXES
Authors: Ohyoshi Akira , Hiraki Shunichi , Kawasaki Hideo
Published: July 2006

The thermal decomposition reaction of halogenopentaammineruthenium(III) complexes was studied by the techniques of thermogravimetry, differential thermal analysis and evolved gas analysis. The complexes were dissociated by two different mechanisms:(a) those in which the Ru(III) was reduced by halide ion; and (b) those in which the Ru(III) was reduced by ammonia molecule. Which mechanism is preferably selected for a thermal decomposition reaction, it seems to be determined by the composition of ligands in the complexes.
α-BROMOADAMANTANONE
Authors: Tabushi Iwao , Yoshida Zen-ichi , Aoyama Yasuhiro
Published: July 2006

α-Bromoadamantanone has been prepared by the Cristol modified Hunsdiecker reaction of α-carboxyadamantanone obtained from adamantane via six steps.
CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTRA OF CYCLODEXTRINS AND ITS PERACETATES
Authors: Takeo Ken’ichi , Hirose Kenji , Kuge Takashi
Published: July 2006

Carbon-13 chemical shifts for α-, β-, and γ-cyclodextrins and its peracetates, and also amylose, in several solvents, are reported with full assignment. It was found that the steric effects imposed by cyclic nature of the dextrins on the conformation of the glucopyranose residues in the dextrins are clearly reflected in their spectra.
A NOVEL DEOXYGENATION OF THIOLSULFONATES AND SULFOXIDES WITH REDUCED IRON
Authors: Fujisawa Tamotsu , Sugimoto Kikuo , Ohta Hiromichi
Published: July 2006

Reduced iron is a very effective reagent for deoxygenation of various thiolsulfonates and sulfoxides to give the corresponding disulfides and sulfides, respectively.
α-ELIMINATION OF N,N-DICHLOROMETHANESULFONAMIDE IN THE PRESENCE OF COPPER
Authors: Shingaki Tadao , Torimoto Noboru , Inagaki Masao , Nagai Toshikazu
Published: July 2006

It was found that N,N-dichloromethanesulfonamide (I) reacted with cyclic ethers and hydrocarbons in the presence of copper to give the N-substituted methanesulfonamides (II) and methanesulfonamide. The non-stereospecific formation of II in the reaction of I with trans- and cis-1,4-dimethylcyclohexanes, contrary to the stereospecific formation of II in the reaction of methanesulfonyl azide with the hydrocarbons, gives a support to a radical mechanism.
MASS SPECTRAL ANALYSIS OF THERMALLY DESORBED GASES FROM DIAMOND SURFACES
Authors: Matsumoto Seiichiro , Sato Yoichiro , Setaka Nobuo , Goto Masaru
Published: July 2006

Mass spectral analysis was made of gases thermally desorbed from oxidized and hydrogenated surfaces of diamond up to 960°C. The chemisorbed oxygen desorbs as CO and CO2, while hydrogen as H2. The desorption in the form of CO occurs at least in two steps.
ALKYL SUBSTITUENT EFFECTS ON C-13 NMR PARAMETERS FOR TRICHLORO-PLATINUM(II)-OLEFIN COMPLEXES AND β-METHOXYALKYLMERCURIC CHLORIDES
Authors: Ibusuki Takashi , Saito Yasukazu
Published: July 2006

C-13 nmr parameters for a series of Pt(II)-olefin complexes and β-methoxyalkylmercuric chlorides are reported and discussed in terms of alkyl substituent effects on the direct metal–carbon couplings and others in order to clarify the property of Pt–C bonding by comparing with Hg–C bonding.
THE NUCLEAR MAGNETIC RESONANCE STUDY OF EXCHANGING SYSTEMS. III. COPE REARRANGEMENT OF CYCLOOCTATETRAENE DIMER BY 13C NMR TOTAL LINE SHAPE ANALYSIS
Authors: Nakanishi Hiroshi , Yamamoto Osamu
Published: July 2006

13C NMR spectra of cyclooctatetraene dimer (III) were measured at various temperatures. The complete line shape analysis of temperature dependent spectra was made using the modified Bloch equation method. The activation parameters of the degenerate Cope rearrangement were obtained and were compared with the results obtained by the conventional coalescence temperature method.
MECHANISM OF CHARGE-TRANSFER POLYMERIZATION: PHOTOSENSITIZED CHARGE-TRANSFER COPOLYMERIZATIONS OF N-VINYLINDOLE WITH ELECTRON-ACCEPTING MONOMERS
Authors: Oshiro Yasuo , Shirota Yasuhiko , Mikawa Hiroshi
Published: July 2006

It was found for the first time that N-vinylindole was copolymerized with such electron-accepting monomers as fumaronitrile or diethyl fumarate to yield 1:1 alternating copolymers by photopoirradiation. The initiation process of the photolymerization was suggested to involve the charge-transfer or probably electron transfer from N-vinylindole to the electron-accepting monomer in the electronically excited state.
STRUCTURE AND REACTIVITY OF ORGANIC IONS IN GAS-PHASE RADIOLYSIS. IV. THE C7H7+ ION FROM CYCLOHEPTATRIENE
Authors: Takamuku Setsuo , Nakamura Katsuyoshi , Nagaoka Kenji , Sakurai Hiroshi
Published: July 2006

The structure of the C7H7+ ion formed by γ radiolysis of cycloheptatriene vapor has been investigated by an ion-trapping with toluene-d8 or dimethylamine. The C7H7+ ion was shown to be mainly a rearranged benzyl type while a tropylium ion was also trapped with dimethylamine in a low yield.
ACID CATALYZED ISOMERIZATION OF HUMULENE (PART 1)
Authors: Naya Yoko , Hirose Yoshio
Published: July 2006

The reaction of humulenes with aq. acetic acid afforded humulol and its acetate in an excellent yield together with various rearranged compounds.
SYNTHESIS OF LANTHANOID ALUMINATES (β-Al2O3 TYPE) USING ARC PLASMA FLAME
Authors: Yajima Seishi , Okamura Kiyohito , Shishido Toetsu
Published: July 2006

New compounds with approximate formulas, La2O2·7Al2O3, Pr2O3·7Al2O3, Nd2·8Al2O3 and Sm2O3·7Al2O3, have been obtained through melting by arc plasma flame and separated into their own single phases by a proper chemical treatment. All of the compounds have the β-Al2O3 type structure. Excepting only La2O3·7Al2O3, these compounds have the β-Al2O3, type structure at temperatures higher than 1500°C.
THE RELATION BETWEEN ORD-CURVES OF β-AMINO ACIDS AND THEIR CONFIGURATIONS
Authors: Seto Yasuhiko , Yamada Takashi , Niwa Koichi , Miwa Shugo , Tanaka Fumio , Kuwata Shigeru , Watanabe Hiroshi
Published: July 2006

It was found that ORD-curves of N-dithiocarbamates of β-amino acids are not always suitable for the assigning of the configuration of β-amino acid. For this purpose it will be better to examine the effect of pH on the curve of β-amino acid itself measured in aqueous medium at a range of 250–350 nm; the value of the molecular rotation of l-β-amino acid at various pH is in the following order: neutral>acidic>alkaline.
EINE NEUE METHODE ZUR SYNTHESE VON TRIAZIN-DERIVATEN AUS AMINOSÄUREN: AKTIVIERUNG DER CARBOXYLGRUPPE MIT DICYCLOHEXYLCARBODIIMID UNTER ZUSATZ VON 3-HYDROXY-5-METHYLISOXAZOL
Authors: Maekawa Kazuyuki , Kuwano Eiichi
Published: July 2006

Das Carboxyl-Ende von Aminosäuren wurde mit 3-Hydroxy-5-methylisoxazol verknüpft, dann liess sich mit Biguanid unter milden Bedingungen versetzen, um den Triazin-Ring zu schliessen.
CHEMISTRY OF NITROSOIMINSS. IV. REACTIONS OF 3-SUBSTITUTED 2-NITROSOIMINO-2,3-DIHYDROBENZOTHIAZOLES WITH GRIGNARD REAGENTS
Authors: Akiba Kin-ya , Kawamura Takayuki , Hisaoka Motoyuki , Inamoto Naoki
Published: July 2006

Reactions of 3-substituted 2-nitrosoimino-2,3-dihydrobenzothiazoles (I) with Grignard reagents gave three kinds of major products depending on the structure of Grignard reagents: the corresponding 2,2-diaryl compounds with arylmagnesium bromides by extrusion of nitrosoimino group, 2-monosubstituted compounds with bulky Grignard reagents, and 2-benzylidenehydrazono derivative with benzylmagnesium chloride, respectively.
KINETIC STUDY OF A COMPLEX FORMATION FROM 1,3,5-TRINITROBENZENE AND SODIUM SULFITE
Authors: Sasaki Muneo
Published: July 2006

A kinetic study on the formation of a σ-complex from 1,3,5-trinitrobenzene (TNB) and sodium sulfite in aqueous solution was carried out in the temperature range, 10.0–30.0°C by the stopped-flow method. The kinetic and thermodynamic parameters were considered in comparison with those of the σ-complex from TNB and hydroxide ion.
REACTIVITIES OF SUBSTITUTED PHENYL RADICALS
Authors: Takayama Kiyoshige , Kosugi Masanori , Migita Toshihiko
Published: July 2006

Relative reactivities of substituted phenyl radicals in chlorine abstraction from carbon tetrachloride were estimated by carrying out competitive reactions of the radicals with carbon tetrachloride and iodine. Negative substituents on the radicals were found to retard the reactivities of chlorine abstraction.
NITRATION OF DEHYDROABIETIC ACID DERIVATIVES
Authors: Ohtsuka Yasuo , Akita Hiroyuki , Tahara Akira
Published: July 2006

Nitration of various dehydroabietic acid derivatives was examined and it was found that nitration was affected by the structure. An interesting substitution occurred at 11,13 (deisopropylation) and 14 positions.
THE CRYSTAL STRUCTURE OF p-HYDROXYBENZALDEHYDE
Authors: Iwasaki Fujiko , Sato Masahiro , Aihara Ariyuki
Published: July 2006

The crystal structure of p-hydroxybenzaldehyde was determined by a three-dimensional X-ray analysis. The molecules are linked by the O–H···O=C intermolecular hydrogen bond between hydroxyl and aldehydic groups parallel to the a axis, forming a zig-zag chain elongated along the b axis. The distance of the hydrogen bond, O···O, is 2.67 Å.
RECOMBINATION REACTION BETWEEN INDIUM AND CHLORINE IN AIR-ACETYLENE FLAME OBSERVED BY MOLECULAR FLAME ABSORPTION SPECTROSCOPY
Authors: Haraguchi Hiroki , Shiraishi Minoru , Fuwa Keiichiro
Published: July 2006

When a solution of indium dissolved in HClO4 was aspirated into an air-acetylene flame, molecular absorption spectrum of InCl in the flame was observed by molecular flame absorption spectroscopy. This indicates that the recombination reaction between indium and chlorine occurs in the flame, following the thermal decomposition of HClO4.
MEBADONIN, A NEW ENT-KAURANE DITERPENOID FROM ISODON KAMEBA OKUYAMA
Authors: Hirotsu Ken , Kamikawa Tadao , Kubota Takashi , Shimada Akira , Isobe Takahiko
Published: July 2006

Mebadonin was isolated from Isodon Kameba Okuyama and the crystal and molecular structure were determined by means of X-ray analysis.
ASYMMETRIC HYDROGENATION OF OLEFINIC COMPOUNDS CATALYZED BY BIS(DIMETHYLGLYOXIMATO)COBALT(II)-OPTICALLY ACTIVE AMINE COMPLEX
Authors: Takeuchi Seiji , Ohgo Yoshiaki , Yoshimura Juji
Published: July 2006

Bis(dimethylglyoximato)cobalt(II)-quinine complex catalyzed asymmetric hydrogenation of oleflnic compounds to afford optically active carboxylic acid and amino acid esters. α-Phenylacrylophenone gave higher optical yield (ca. 50%) than α,β-unsaturated esters (7–20%).
THE X-RAY DETERMINATION OF THE CONFORMATIONS OF 2,7-DIMETHYL- AND 2,7-DIPHENYL-4,5-BENZOTROPONE
Authors: Ibata Koichi , Shimanouchi Hirotaka , Sasada Yoshio
Published: July 2006

The crystal structures of the title compounds were determined by X-ray analysis. In spite of overcrowding of the carbonyl oxygen atom and the substituents, the seven-membered rings are nearly planar. There is observed bond alternation in the seven-membered ring, especially the significant elongation of the single bonds neighboring to the carbonyl.
DETERMINATION OF FREE PHENOL IN PHENOL RESOLE RESIN BY GEL PERMEATION CHROMATOGRAPHY
Authors: Tsuge Morio , Miyabayashi Tatsuya , Tanaka Shigeyuki
Published: July 2006

The free phenol in phenol resole resin was determined by gel permeation chromatography with the high molecular polystyrene as the internal standard. The observed values were in close agreement with that obtained by gas chromatography. The reproducibility was about 4 per cent as the coefficient of variance.
PHOTOCHEMICAL REACTION OF 9,10-PHENANTHRAQUINONE WITH GLYOXALS
Authors: Maruyama Kazuhiro , Takahashi Gensho
Published: July 2006

A novel type of photochemical reaction between 9,10-phenanthraquinone and glyoxal was discovered and extended to several glyoxals, i,e., methyl-, ethyl-, n-propyl-, i-propyl-, t-butyl-, cyclohexyl-, and phenyl-glyoxals. In these reactions, monoesters of 9,10-dihydroxyphenanthrene could be obtained accompanying with the vigorous evolution of carbon monoxide. The dynamic aspect of these photochemical reactions was investigated using CIDNP technique, and the reverse hydrogen abstraction reaction between two radical species which were resulted from glyoxal and photoexcited 9,10-phenanthraquinone was found to occur.
ACIDIC AND BASIC PROPERTIES OF P2O5–CaO MIXED OXIDES
Authors: Tada Akio , Yoshida Masatoshi
Published: July 2006

P2O5–CaO was prepared and its acidic and basic properties were studied. It was found that P2O5–CaO (0.1 ≤P2O5/CaO ≤ 0.6) had both acidic and basic properties. The maximum strength Ho of acid site and that of base site for P2O5–CaO (mole ratio : 0.2) were 1.5 and 17.2 respectively.
THE CYCLOADDITION REACTION OF ISOBENZOFURAN WITH SOME TROPONES
Authors: Takeshita Hitoshi , Wada Yasuo , Mori Akira , Hatsui Toshihide
Published: July 2006

Isobenzofuran, generated by two different methods, was taken to the reaction with tropone, 2-methoxytropone,and 2-chlorotropone. The [6+4]-adducts were obtained from these three tropones examined, but the [2+4]-adducts were obtained from the former two. The structures of the adducts have been deduced on the basis of the spectroscopic methods of analyses.
POTENTIAL-SWEEP STUDY FOR HYDROGEN ELECTRODE REACTION ON MERCURY
Authors: Katayama Akiko , Kita Hideaki
Published: July 2006

The potential-sweep method was applied to mercury cathode in HCl, HBr, and HI aqueous solutions. Resulting current-potential curves for the hydrogen evolution reaction revealed a plateau, i.e., an almost constant current in the potential region from −0.65 to −1.0 V vs. N.H.E. which is the characteristic behaviour expected from the theoretical non-steady state analysis for the electrochemical mechanism. Effects of the sweep rate and anion are briefly discussed.
THE NATURE OF ACID SITES ON SILICA-ALUMINA AND ALUMINA CATALYSTS
Authors: Tomida Minoru , Tanaka Masako , Iwasawa Yasuhiro , Ogasawara Sadao
Published: July 2006

Acid sites of SiO2–Al2O3 and Al2O3 were investigated by the thermal desorption of n-butylamine. SiO2–Al2O3 gave n-butylamine and n-butene as desorbed components, while dibutylamine and n-butene were formed on Al2O3. The differences in desorption behavior could be explained by the different assembly of the sites on these catalysts.
REDUCTION WITH TRICHLOROSILANE. VI. DESULFURATION OF PHOSPHINE SULFIDES AND PHOSPHOROTHIONATE WITH TRICHLOROSILANE
Authors: Nakao Ren , Fukumoto Tsugio , Tsurugi Jitsuo
Published: July 2006

It was found that trisubstituted phosphine sulfides and triphenyl phosphorothionate were reduced to the phosphines and triphenyl phosphite with trichlorosilane under γ irradiation.
SELECTIVE HYDROGENATION OF α,β-UNSATURATED CARBONYL AND NITRILE COMPOUNDS BY MEANS OF CARBON MONOXIDE AND WATER IN THE PRESENCE OF RHODIUM CARBONYL COMPLEX
Authors: Kitamura Takanori , Sakamoto Noritoshi , Joh Takashi
Published: July 2006

α,β-Unsaturated carbonyl and nitrile compounds are hydrogenated selectively by means of carbon monoxide and water in the presence of a catalytic amount of rhodium carbonyl complex.
DIELS–ALDER REACTION OF SUBSTITUTED MALEIC ANHYDRIDES WITH 1-VINYLCYCLOHEXENE AN APPROACH TO THE SYNTHESES OF CLERODANE DITERPENES
Authors: Matsuo Keizo , Tokoroyama Takashi , Kubota Takashi
Published: July 2006

In an attempt to construct stereospecifically the clerodane skeleton, the Diels–Alder reactions of 1-vinylcyclohexene with aconitic, citraconic and chloromethylmaleic anhydrides have been undertaken and the configurations of the adducts are deduced. The product from the reaction with the last compound is found to be a potential intermediate for the syntheses of clerodane diterpenes.
HELIX-COIL TRANSITION OF POLY-α,l-GLUTAMIC ACID IN AQUEOUS SOLUTION STUDIED BY THE DISSOCIATION FIELD EFFECT RELAXATION METHOD
Authors: Yasunaga Tatsuya , Sano Takayuki , Takahashi Kojiro , Takenaka Hidetoshi , Ito Satoshi
Published: July 2006

The measurements of dissociation field effect relaxation in aqueous poly-α,l-glutamic acid were carried out. From the feature of pH dependency of relaxation time, the observed relaxation was attributed to the helix-coil transition. The helical growth rate constant was calculated to be (2.9±2)×107 sec−1 from Schwarz’s equation.
IONIZATION POTENTIALS OF ANTHRACENE
Authors: Aihara Jun-ichi , Inokuchi Hiroo
Published: July 2006

From the observation of the breaks of the photoionization efficiency curve (PIE) of molecular anthracene in the vacuum ultraviolet wavelength region, the higher ionization potentials could be estimated.

In comparison with the photoelectron spectroscopical data, we could better assign the breaks of PIE to the σ-orbitals of the molecule.
A NEW SYNTHESIS OF BULLATENONE
Authors: Takeda Akira , Tsuboi Sadao , Sakai Takashi
Published: July 2006

Bullatenone (IIIa) and its homologs substituted at p- and m- positions in the benzene ring have been prepared by the decarboxylative hydrolysis of ethyl 2,3-dihydro-2,2-dimethyl-3-oxo-5-arylfuran-4-carboxylates (I), which were obtained by the reaction of α-bromoisobutyryl bromide and ethyl sodioaroylacetate.
9,10,13-TRIHYDROXYOCTADECANOIC ACID, A NEW FATTY ACID IN THE ROOTS OF KIDNEY BEAN (PHASEOLUS VULGARIS L., “BENI-KINTOKI”)
Authors: Takasugi Mitsuo , Kobayashi Kiroku , Anetai Masaki , Ueno Shoji , Katsui Nobukatsu , Masamune Tadashi
Published: July 2006

A new fatty acid was isolated from the roots of kidney bean and identified as 9,10,13-trihydroxyoctadecanoic acid. The hatching stimulating activity to the soybean cyst nematode is also discussed.
VINYL POLYMERIZATION. 303. MEASUREMENT OF THE INITIATION RATE OF THE POLYMERIZATION OF METHYL METHACRYLATE BY THE SYSTEM OF SOLUBLE STARCH, WATER, AND CARBON TETRACHLORIDE
Authors: Imoto Minoru , Ree Keiu , Ouchi Tatsuro
Published: July 2006

The polymerization of methyl methacrylate initiated with soluble starch, water, and carbon tetrachloride was carried out without shaking. The rate of initiation was measured, using hydroquinone as an inhibitor, and was found to be proportional to the concentration of starch in the water phase.
OXIDATION OF 2,5-BIS(p-CHLOROPHENYL)-3,6-DIPHENYL-1,2,4,5-TETRAAZAPENTALENE AND SOME PROPERTIES OF THE PRODUCTS
Authors: Matsumoto Akira , Lee Joung Hee , Yoshida Masayuki , Simamura Osamu
Published: July 2006

The title compound (I) was oxidized to give 3-benzoyl-1-p-chlorophenyl-4-p-chlorophenylazo-5-phenylpyrazole (II) and 3-benzoyl-1-p-chlorophenyl-4-p-chlorophenylazoxy-5-phenylpyrazole (III), both of which underwent trans to cis isomerization on irradiation with ultraviolet light.
THE TRIPLET DIMER Of M-DINITROBE’NZENE ANION RADICALS ADSORBED ON MAGNESIUM OXIDE
Authors: Iizuka Tokio
Published: July 2006

The formation of the triplet state m-dinitrobenzene anion radical dimer adsorbed on magnesium oxide was observed at room temperature by means of visible and electron spin resonance spectroscopies. The amount of formed dimers could be controlled by pre-heat-treatment time of the oxide and remarkably decreased on adsorption after the calcination in air.
SELECTIVE FORMYLATION OF 9-SUBSTITUTED 2-METHOXYANTHRACENES
Authors: Iwata Masaaki , Emoto Sakae
Published: July 2006

Formylation of 9-substituted 2-methoxyanthracenes with N-methylformanilide and phosphorus oxychloride gave its 1-formyl derivatives, while with N-methylformanilide and n-butyllithium it afforded the corresponding 3-formyl derivatives.
A CONVENIENT SYNTHESIS OF DINUCLEOTIDES BY OXIDATION-REDUCTION CONDENSATION USING NUCLEOSIDE 5′ -PHOSPHORODIANILIDATES
Authors: Hashimoto Mitsunori , Mukaiyama Teruaki
Published: July 2006

5′-Phosphorodianilidates of various N-protected nucleoside were prepared from the N-protected 5′-deoxyribomononucleotides (e.q., d-pABz-OAc) and aniline with coupling reagents, triphenylphosphine and 2,2′-dipyridyl disulfide, in yields ranging from 60 to 65%. The phosphorodianilidates were condensed with suitably protected mononucleotides by the above mentioned oxidation-reduction condensation to afford the dinucleotide phosphorodianilidate, such as (Remark: Graphics omitted.)d-pABzpCAn, (Remark: Graphics omitted.)d-pTpT, (Remark: Graphics omitted.)d-pABzpT in yields ranging from 50 to 75%. The phosphorodianilidates were successfully converted to the corresponding parent 5′-phosphate by treatment with isoamylnitrite.
REACTION OF ALKYLPHENYLACETYLENES WITH THALLIUM(III) ACETATE
Authors: Uemura Sakae , Sohma Kazuhiro , Tara Hideyuki , Okano Masaya
Published: July 2006

The reaction of alkylphenylacetylenes with thallium(III) acetate in acetic acid under mild conditions (at 60–70°C for 1 hr) afforded a mixture of two isomeric acetoxythallated compounds in good yields. The hydrodethallation of these products to give the corresponding vinyl acetates was accomplished with boiling acetic acid.
CYCLIC DIMER OF 1,2-DIBENZOYLACETYLENE
Authors: Tsutsui Minoru , Hrung Yang-chin , Francis James N , Harasawa Kenji
Published: July 2006

1,2-dibenzoylacetylene has been found to be cyclodimerized and rearranged thermally. Similar products have been obtained from the bis-para- chloro and bis-para-bromo benzoyl acetylenes. The proposed structure which we believe proceeds via a cyclobutadiene intermediate is shown in the figure.
THEORETICAL CALCULATIONS OF MEAN POLARIZABILITY DERIVATIVES WITH RESPECT TO INTERNAL SYMMETRY COORDINATE
Authors: Shinoda Hiroyuki , Miyazaki Tomoo
Published: July 2006

The CNDO/2 calculation has been applied to the mean polarizability derivatives, (Remark: Graphics omitted.) and (Remark: Graphics omitted.), where α is the mean polarizability and Sj an appropriate symmetry coordinate. The calculated (α′)’s were proportional to the observed values. The α″⁄α′ ratio increased with the energy-increase of the incident light.
CALCULATION OF THE RELATIVE LEWIS ACIDITIES OF THE GROUP IV TETRAHALIDES
Authors: Ito Osamu , Hatano Masahiro
Published: July 2006

The order of the formation energies of the adducts between one Lewis base and the group IV tetrahalides calculated by the extended Hückel method agreed with the observed relative Lewis acidities. The Lewis acidities of the group IV tetrahalides are governed by both the steric factor and the electronic factor.
NOVEL SYNTHESIS OF NITRILES FROM AMIDES BY REACTION WITH PHOSPHOROUS TRIS(DIETHYLAMIDE)
Authors: Sodeyama Touru , Kodomari Mitsuo , Itabashi Kunio
Published: July 2006

Benzamide was allowed to react with phosphorous tris(diethylamide) P(NEt2)3 under reflux in THF, and benzonitrile was obtained in good yield. Under the same condition, acetamide, nicotinamide, and thiobenzamide also reacted with P(NEt2)3 to give the corresponding nitriles respectively. Similar reaction with triethyl phosphite did not occur.
PRESSURE EFFECT ON OPTICAL SPECTRA AND ELECTRICAL RESISTIVITY OF SOME Pt-COMPLEXES
Authors: Hara Yoji , Shirotani Ichimin , Minomura Shigeru
Published: July 2006

K2Pt(CN)4·3H2O , MgPt(CN)4·7H2O and BaPt(CN)4·4H2 exhibit an anomalously large red shift both of the absorption and luminescence spectra with hydrostatic pressure and a continuous decrease of the electrical resistivity by a factor of approximately 10−4 up to 180 kbar.
LAYERED COMPOUNDS. XII. [2.2]PARACYCLO- AND [2.2] (1,4)NAPHTHALENO-ANTHRACENOPHANES
Authors: Iwama Akio , Toyoda Toshihiro , Otsubo Tetsuo , Misumi Soichi
Published: July 2006

[2.2]Paracyclo-(9,10)- and -(1,4)-anthracenophanes (I and II) and [2.2](1,4)naphthaleno(9,10)anthracenophane (III) have been synthesized and it is noted on the basis of their electronic spectra that in either paracyclo- or naphthaleno-anthracenophane, there is more appreciable transannular interaction in 9,10-bridged system than in 1,4-bridged one.
SYNTHESIS OF AMINO-DEOXY CELLULOSE
Authors: Cho Hwan , Teshirogi Takuma , Sakamoto Munenori , Tonami Hiroaki
Published: July 2006

Amino-deoxy cellulose of up to 3 % nitrogen content was synthesized by a new method in which cellulose pyridinium sulfate was treated with ammonia in ethanol under mild conditions.
LASER EXCITED RAMAN SPECTRA OF β-HYDROQUINONE CONTAINING THE GUEST MOLECULE OF ACETONITRILE
Authors: Fukushjma Kunio
Published: July 2006

Laser excited Raman spectra of β-hydroquinone clathrate of acetonitrile and α-hydroquinone in their crystalline state were observed. The Raman band at 96 cm−1 for the β-hydroquinone was assigned to the rotational vibration of the guest molecule, and remarkable difference was found between the Raman spectra of the β-hydroquinone and α-hydroquinone.
FORMATION OF CUBIC MOLYBDENUM CARBIDE BY THE CARBONIZATION OF MoO3 WITH PLASMA ARC
Authors: Matsumoto Osamu , Saito Michio , Ohtsuki Satoru
Published: July 2006

The formation of cubic molybdenum carbide (α-MoC1−x) by the carbonization of MoO3 with plasma arc was studied. α-MoC1−x including small amounts of hexagonal η-MoC1−x was formed. By the carbonization of the mixture of MoO3 and TiO2 the cubic solid solution of Mo–Ti–C system was formed. These products were superconductors.
SELECTIVE OXIDATION OF p-ALKYLPHENOLS WITH TETRAPEROXYMOLYBDATE, [Mo(O2)4]=:A PREPARATIVE METHOD OF A DIENONE HYDROPEROXIDE
Authors: Hayashi Yuji , Shioi Shunsuke , Togami Masatoshi , Sakan Takeo
Published: July 2006

p-Alkylphenols (I), on oxidation with tetraperoxymolybdate, give a dienone hydroperoxide (II) of p-quinol type in high yield. The practice and some limitations are described.
A FACILE ROUTE TO MACROCYCLIC KETONES. DIRECT DIVINYLATION OF 2-CHLOROCYCLODODECAN-1-ONE
Authors: Nishino Masaki , Kondo Hisao , Miyake Akihisa
Published: July 2006

The reaction of 2-chlorocyclododecan-1-one with vinylmagnesium chloride (molar ratio at 1:2) gave directly 1,2-divinylcyclododecan-1-ol, which was easily converted to 5-cyclohexadecen-1-one. This one-step divinylation was found to proceed not through a direct displacement of the Grignard reagent with the chlorine atom, but through a pinacol-like rearrangement of a vinyl group.
STUDY OF ADSORPTION OF POTASSIUM ATOMS ON A MICA SURFACE BY MEANS OF MOLECULAR BEAMS
Authors: Tomoda Shinji , Kusunoki Isao , Kodera Kumasaburo
Published: July 2006

The process of the deposition of potassium atoms on a mica surface is observed by means of molecular beams. The sticking coefficient changes with the deposition time. The observed change is discussed by a simple rate theory on assumptions similar to those of the “BET” model.
AN ESR STUDY ON PYRAMIDAL INVERSION AT THE TERVALENT CARBON ATOM OF 2-METHYL-1,3-DIOXOLAN-2-YL RADICAL
Authors: Kobayashi Shigero O , Simamura Osamu
Published: July 2006

The effect of temperature on the esr spectrum of 2-methyl-1,3-dioxolan-2-yl radical was investigated. At low temperature, the four γ-hydrogens of this radical were observed to be two non-equivalent groups of two equivalent hydrogens. The radical centre undergoes a pyramidal inversion with an enthalpy of activation of 5.6 kcal/mole and an entropy of activation of 1.0 e.u.
ALLYLATION OF AROMATIC NUCLEUS WITH ALLYL DIPHENYL PHOSPHATE IN THE PRESENCE OF BORON TRIFLUORIDE ETHERATE
Authors: Butsugan Yasuo , Kawase Koji , Saheki Kyoji , Muto Masao , Bito Tadaaki
Published: July 2006

Allyl diphenyl phosphate[ADP] reacted with a large excess of aromatic compounds possessing electrondonating group in the presence of boron trifluoride etherate under mild experimental conditions to give selectively the corresponding monoallylated compounds in the yield of 40–60%.
EXTRA COUPLING OF AN ETHYL RADICAL ADSORBED ON THE ZEOLITES
Authors: Kudo Shigetoshi , Hasegawa Akinori , Komatsu Tsuyoshi , Shiotani Masaru , Sohma Junkichi
Published: July 2006

New ESR spectra were obtained from the irradiated ethane adsorbed on zeolites. The simulation method and an analysis indicate that the new spectra are those from ethyl radical having additional coupling with an extra proton.
ACID CATALYZED ISOMERIZATION OF HUMULENE (PART 2) STEREOCHEMISTRY AND THE REACTION PATHWAYS
Authors: Naya Yoko , Hirose Yoshio
Published: July 2006

Cyclization products of humulene were studied with special emphasis on their stereochemistry and the reaction mechanisms were established with the aid of deuterium labeling.
PEPTIDE SYNTHESIS BY OXIDATION-REDUCTION CONDENSATION BY USE OF TRIARYL PHOSPHITE AS REDUCING REAGENT
Authors: Ueki Masaaki , Shishikura Takashi , Hayashida Akira , Mukaiyama Teruaki
Published: July 2006

Use of triaryl phosphite as reducing reagent in peptide synthesis by oxidation-reduction condensation was studied. Aryl esters having electron-withdrawing substituents gave optically pure peptides in good yields by reacting in N,N-dimethylformamide solution.
CHEMICAL PROOF OF ENANTIOMERIC (−)-LONGIBORNEOL
Authors: Matsuo Akihiko , Nakayama Mitsuru , Hayashi Shuichi
Published: July 2006

During the course of investigation on constituents of liver-worts, four sesquiterpenoids showing opposite rotation, (−)-longiborneol, (−)-α-longipinene, (−)-longifolene and (+)-α-himachalene, were isolated from a Japanese liverwort. By preparation of derivatives and application of physical methods the absolute configuration of (−)-longiborneol, the main component, was elucidated as an optical antipode (I) of (+)-longiborneol isolated from higher plants.
NUCLEAR QUADRUPOLE RESONANCE OF CHLORINE IN SOME HEXACHLOROPLATINATE(IV) HEXAHYDRATES
Authors: Sasane Akinobu , Tanaka Tomoyoshi , Toba Akira , Kume Yoshio , Nakamura Daiyu , Kubo Masaji
Published: July 2006

The nuclear quadrupole resonance of chlorine in MptCl6–6H2O (M(II) = Mn, Fe, Co, Ni, Cu, Zn, Cd, Ba) was observed between 77 and 450 K. Copper(II) hexachloroplatinate(IV) hexahydrate shows a phase transition at 137 K. This complex and barium hexachloroplatinate(IV) hexahydrate yield resonance lines showing a positive temperature coefficient capable of being interpreted in terms of hydrogen bond formation.
ALKYLATION OF TOLUENE WITH PROPYLENE OVER THE ELECTRON DONOR–ACCEPTOR COMPLEXES OF AROMATIC HYDROCARBONS WITH SODIUM
Authors: Tsuchiya Susumu , Saito Yoshiaki , Murakami Tsugio , Iwata Hideaki , Annaka Tsutomu
Published: July 2006

The alkylation of toluene with propylene takes place over the electron donor–acceptor complexes of anthracene, chrysene, benzoquinone, and p-chloranil with sodium, and two types of the alkylation, the side-chain- and the nuclear-alkylation, have been suggested by the reaction products, butylbenzenes and cymenes.
ABSOLUTE CONFIGURATIONS OF TWO SUGARS OF ANTIBIOTIC B-58941
Authors: Suzuki Takashi , Sugita Norio , Asai Mitsuko
Published: July 2006

Absolute configurations of neutral sugar of antibiotic B-58941 and two methyl glycosides of its dihydro-sugar are assumed as 2,3,6-trideoxy-l-hexopyranos-4-ulose and methyl 2,3,6-trideoxy-(α or β)-l-erythro-hexopyranoside, respectively. Methyl glycoside of a basic sugar of B-58941-B is identified as methyl d-mycaminoside.
A NEW CONDENSATE OBTAINED FROM THE AGLYCONE MOIETY OF ANTIBIOTIC B-58941
Authors: Suzuki Takashi , Mizuta Eiji , Sugita Norio
Published: July 2006

A new condensate (macrocyclic lactone) is obtained by refluxing depoxy B-58941-B, prepared by depoxidation of antibiotic B-58941, with sulfonic acid-type resin in methanol. The structure of the condensate is assumed as 3,5-dihydroxy-4,8,12,14-tetramethyl-9-oxo-6,8-(1-methoxyethano)-10,12-heptadecadien-15-olide.
STRUCTURES OF NEW SESQUITERPENES RELATED TO PSEUDOTSUGONAL AND TODOMATUIC ACID ISOLATED FROM DOUGLAS-FIR WOOD
Authors: Sakai Tsutomu , Hirose Yoshio
Published: July 2006

Three new sesquiterpenes related to pseudotsugona and todomatuic acid, named dihydropseudotsugonol, dihydropseudotsugonol, and ar-todomatuic acid, have been isolated from the volatile wood oil of Douglas fir. The structures and stereochemistry of these compounds have been established.
SYNTHESIS OF NEW HYDROTALCITE-LIKE COMPOUNDS AND THEIR PHYSICO-CHEMICAL PROPERTIES
Authors: Miyata Shigeo , Kumura Teruhiko
Published: July 2006

The new hydrotalcite-like compounds which consist of divalent metal, trivalent metal and inorganic or organic anion were synthesized and it was found that they have many characteristic properties such as the formation of solid solutions, anion exchange and molecular sieving. Some of them were capable of separating the mixture of air and hydrogen into N2, O2 and H2.
CARBON-13 NUCLEAR MAGNETIC RESONANCE OF METAL COMPLEXES. I.
Authors: Hirota Michio , Koike Yasuo , Ishizuka Hidehiro , Yamasaki Akira , Fujiwara Shizuo
Published: July 2006

Carbon-13 chemical shifts were measured for 15 cyanometallate complexes in aqueous solution with Fourier-Transform NMR spectroscopy. The chemical shift values are distributed between −50.33 ppm (from external benzene standard) for Fe(CN)64− and +2.66 ppm for Pt(CN)42−. The coupling constant 1JC-Co was found to be 126 ± 4 Hz for Co(CN)63−.
A NEW SYNTHETIC ROUTE TO 1,3-DITHIOLIUM SALTS INVOLVING NEIGHBORING GROUP PARTICIPATION OF DITHIOCARBAMATE GROUP
Authors: Hiratani Kazuhisa , Shiono Hiroyuki , Okawara Makoto
Published: July 2006

A new and useful synthetic route to 1,3-dithiolium salts involving neighboring group participation of dithiocarbamate group as a key step is described. 4-Bromo-2-dialkylamino-1,3-dithiolan-2-ylium bromide was obtained in high yield by the addition of equimolar bromine to S-vinyl-N,N-dialkyldithiocarbamate, and then, pyrolysis of the salt under reduced pressure gave 1,3-dithiolium salt in excellent yield. 4-Substituted-1,3-dithiolium salts were also obtained in the same way.
REACTION OF SULFINIC ESTERS WITH METHYLSULFINYLCARBANION
Authors: Kunieda Norio , Nokami Junzo , Kinoshita Masayoshi
Published: July 2006

Sulfinic esters react with methylsulfinylcarbanion to give the corresponding α-methylsulfinylmethyl sulfoxides(I) in good yields. The per cent ratio of meso form to dl form of the product obtained is about 60 : 40. When (−)-menthyl (−)-(S)-p-toluenesulfinate is treated with methylsulfinylcarbanion, dextrorotatory α-methylsulfinylmethyl p-tolyl sulfoxide(IIa) is obtained. Recrystallization of (IIa) yields the diastereomerically pure (+)-(S)-α-methylsulfinyl-(R)-methyl p-tolyl sulfoxide(IIb). Based on these observations, the stereochemistry of the reaction is discussed.
PHOTOELECTRON SPECTRUM OF VINYLCYCLOPROPANE
Authors: Harada Yoshiya , Seki Kazuhiko , Suzuki Akira , Inokuchi Hiroo
Published: July 2006

The photoelectron spectrum of vinylcyclopropane has been measured by using the 21.22 eV helium resonance lines. Eleven ionization potentials have been observed. The values of the first two ionization potentials have been explained by the conjugative interaction between the σ-orbitals of the cyclopropane ring and the bonding π-orbital of the vinyl group.
THERMALLY STIMULATED CURRENT IN SMECTIC LIQUID CRYSTALS
Authors: Tachibana Taro , Takamatsu Toshiaki , Fukada Eiichi
Published: July 2006

Thermally stimulated current curves were determined for two samples of smectic liquid crystals; diethyl azoxybenzene-4, 4′-dicarboxylate and ethyl p-(p-ethoxybenzylidene) aminocinnamate. The curves showed peaks or kinks at phase transition points. The form of the curves was interpreted in terms of the release of impurity ions accompanying the phase transition.
PREPARATION AND LATTICE DISTORTION OF PEROVSKITE-TYPE COMPOUNDS A2+R4+O3 (A = Ba,Sr R = Ce,Pr,Tb)
Authors: Yoshimura Masahiro , Nakamura Tetsuro , Sata Toshiyuki
Published: July 2006

Preparation and lattice distortion of perovskite-type compounds A2+R4+O3 were studied. All of them belong to the same lattice symmetry of orthorhombic Pbnm,that is,they have monoclinic perovskite cells. The magnitude of the monoclinic distortion increases mainly along the diagonal axis of the b-plane of the perovskite cell with the decrease of “tolerance factor”.
SYNTHESIS OF (±)-TETRAHYDROLIGULARENOLIDE
Authors: Tatee Tochiro , Takahashi Takeyoshi
Published: July 2006

The synthesis of (±)-tetrahydroligularenolide [(±)-II] is described to confirm the structure of ligularenolide (I).
C9H10 HYDROCARBONS. THE PHOTOCHEMISTRY OF BARBARALANE
Authors: Tsuruta Haruki , Kimagai Tsutomu , Mukai Toshio
Published: July 2006

Irradiation of Toarbaralane (1c) afforded four products (3, 4, 5 and 6). The formation of 3, 4 and 5 suggests that 1c initially rearranges to bicyclo[4.2.1]nona-2,4,7-triene (7), which then converts into these products. This suggestion was supported by control experiments. The possible mechanistic pathways for these photochemical rearrangements were outlined.
FORMATION OF MONOTERPENOID SKELETON FROM C9 DIEPOXIDE USING 1,3-DITHIANE
Authors: Torii Sigeru , Matuyama Yuziro , Isihara Masakazu , Uneyama Kenji
Published: July 2006

The reaction of 2,2-dilithio-l,3-dithiane with C9 diepoxide (3) prepared from 6-methyl-5-hepten-2-one (1) afforded precursors of monocyclic and acyclic monoterpenoid compounds (4), (5), (6a), and (6b).
REACTION OF NUCLEIC ACID BASES WITH EPOXIDES AND LACTONE
Authors: Kondo Koichi , Sato Toshiaki , Takemoto Kiichi
Published: July 2006

Reaction of adenine with propylene oxide and styrene oxide was found to give 9-(2-hydroxypropyl)- and 9-(2-hydroxyphenethyl)adenine, respectively. N-carboxyethylated uracil, thymine and cytosine were prepared by allowing to react the corresponding pyrimidines with propiolactone.
ESTIMATING MECHANISM AND KINETIC RATE CONSTANTS USING ITERATIVE SEARCH TECHNIQUE I. ANATION REACTION OF AQUOPENTAAMMINERUTHENIUM(III) COMPLEXES IN AQUEOUS SOLUTION
Authors: Ohkubo Katsutoshi , Sakamoto Hiroyuki , Ohyoshi Akira
Published: July 2006

The elementary reaction mechanism and the kinetic rate constants for the anation reaction of aquopentaammineruthenium(III) complexes are estimated by a new iterative search technique. The anation mechanism is well illustrated by the SN1 and SN2 combined reaction map. The five-coordinated species participates directly in the reaction as a momentarily living intermediate, and the seven-coordinated species seems to be allowed only in the transition state.
NH4Cl–CuCl AS A CATALYST FOR THE SYNTHESIS OF KETAZINE DIRECTLY FROM BENZOPHENONE, AMMONIA AND OXYGEN
Authors: Hayashi Hiromu , Kawasaki Kengo , Murata Tsutomu
Published: July 2006

A new catalyst, NH4Cl–CuCl, for the synthesis of benzophenone azine is proposed. The recovery of expensive CuCl should be simplified than in the case of ZnCl2–CuCl. An improved catalyst, NH4Cl–CuCl·Ph2C=NH, is also descrived.
EXCIMER PHOSPHORESCENCE OF NAPHTHALENE IN FLUID SOLUTION
Authors: Takemura Takeshi , Baba Hiroaki , Shindo Yoshio
Published: July 2006

The phosphorescence spectrum of naphthalene has been measured in fluid isooctane solution in the temperature range of 80 to −100°C. The spectrum is essentially different from that obtained in rigid solution at 77K, and is ascribable to phosphorescence from the triplet excimer of naphthalene. An analysis of the experimental results suggests that the radiative rate constant for the triplet decay is enhanced as a result of the formation of the triplet excimer.
SKELETAL REARRANGEMENT IN DEHYDROGENATION OF THUJOPSENE AND ITS CONGENERS
Authors: Itô Shô , Yatagai Mitsuyoshi , Endo Katsuya , Ueda Yasutsugu
Published: July 2006

Dehydrogenation of thujopsene and widdrol revealed extensive skeletal rearrangement. The reaction pathway was established by the isolation and dehydrogenation of the stable intermediates.
TRIPLET STATE ESR OF 1,10-PHENANTHROLINE AND 2,9-DIMETHYL-1,10-PHENANTHROLINE METAL CHELATES
Authors: Fujita Hideo , Kako Saburo , Ohya-Nishiguchi Hiroaki , Deguchi Yasuo
Published: July 2006

Triplet state ESR spectra of 1,10-phenanthroline and 2,9-dimethyl-1,10-phenanthroline metal chelates are reported with their zero-field splitting parameters.
PHOTOCHEMICAL REACTION OF 2-CYANOQUINOLINE 1-OXIDES IN AN ACIDIC ALCOHOL. SYNTHESIS OF 6-ALKOXY-2-CYANOQUINOLINES
Authors: Kaneko Chikara , Hasegawa Hiroshi , Tanaka Seiji , Sunayashiki Kosaku , Yamada Sachiko
Published: July 2006

The photolysis of 2-cyanoquinoline 1-oxide and its 4-methyl derivative in a variety of alcohols in the presence of conc. HCl gives the corresponding 6-alkoxy-and 6-chloroquinoline 2-carbonitriles, whose relative ratio depends on the concentration of the acid and the kind of alcohols. Similarly, the photolysis of these N-oxides in an alcohol in the presence of cone. H2SO4 gives 6-alkoxyquinoline 2-carbonitriles as the main substitution product.

A mechanism is postulated for this novel photo-alkoxylation reaction.
ASYMMETRIC HYDROGENATION OF SILYL ENOL ETHERS. AN ALTERNATIVE ROUTE TO OPTICALLY ACTIVE ALCOHOLS
Authors: Tanaka Masato , Watanabe Yoshihisa , Mitsudo Take-aki , Yasunori Yukio , Takegami Yoshinobu
Published: July 2006

Asymmetric synthesis of alcohols has been achieved via hydrogenation of silyl enol ethers catalyzed by rhodium complexes with a variety of optically active phosphine ligands.
MICROWAVE SPECTRUM OF CHLOROMETHYLGERMANE
Authors: Nakagawa Jun , Hayashi Michiro
Published: July 2006

Microwave spectra of five isotopic species of chloromethylgermane were studied in the 8000–34000 MHz region. The barrier height of the internal rotation was determined to be 1733±30 cal/mole from the observed A-E splittings of the torsional excited state. The quadrupole coupling constants were obtained from the hyperfine structures.
CHEMICAL EFFECT ON X-RAY K-ABSORPTION EDGES OF MANGANESE, CHROMIUM, AND VANADIUM
Authors: Asada Eiichi
Published: July 2006

The narrow absorption peak appearing on the lower energy side of the K-absorption edges of manganese, chromium, and vanadium in the form of oxides has been specially investigated. The appearance of this peak depends on the oxidation number of metal atoms, rather than on their coordination number.
THE PHOTO-INDUCED ALCOHOLYSIS OF BENZOTRICHLORIDE
Authors: Ishigami Tatsuzo , Kinoshita Yasunori , Sugimori Akira
Published: July 2006

Benzotrichloride undergoes a photochemical solvolysis reaction in alcohol forming alkyl benzoate. The reaction is greatly accelerated in the presence of oxygen. It is suspected the involvement of the normally forbidden S0→T1 transition in the course of the reaction.
ESR SPECTRA OF ASCORBIC ACID RADICALS IN APROTIC SOLVENTS
Authors: Kirino Yutaka
Published: July 2006

ESR spectral parameters of the radicals from l-ascorbic acid and its analogs in aprotic solvents are reported and compared with those for the same radicals in aqueous solutions. Marked differences in g factor as well as shifts (up to 16%) in proton and 13C hyperfine coupling constants have been observed. Conformational changes in the side chain result in the C6 protons becoming magnetically nonequivalent in the radical from l-ascorbic acid while equivalent in the radical from d-araboascorbic acid.
MOLECULAR STRUCTURE OF TRIMETHYLENE SULFIDE STUDIED BY GAS ELECTRON DIFFRACTION
Authors: Karakida Ken-ichi , Kuchitsu Kozo , Bohn Robert K
Published: July 2006

The skeletal structure of trimethylene sulfide (thietane) has been studied by gas electron diffraction. The bond distances (rg) and angles (rα) with their limits of error are: r(C-S) = 1.847±0.002 Å, r(C-C) = 1.550±0.003 Å, r(C-H) = 1.101±0.006 Å, ∠CSC = 77.0±0.5° and the effective average value of the dihedral angle, ∠C2SC4-C2C3C4 = 26±4°.
PREPARATION AND ISOMERIZATION OF THE ISOMERS OF ETHYLENEDIAMINE-N,N′-DIACETATO(TRIMETHYLENEDIAMINE)COBALT(III) ION
Authors: Kuroda Kashiro
Published: July 2006

Two isomers of ethylenediamine-N,N′-diacetato(trimethylenediamine)cobalt(III) perchlorate, α- and β-[Co(EDDA)(tn)] ClO4, have been synthesized, and the isomerization from the β-isomer to the α-isomer has been examined kinetically in carbonate buffer solutions. The reaction character has been compared with that of the corresponding ethylenediamine complex.
PHOTOLYSIS OF Δ2-TETRAZOLINES: FORMATION OF DIAZIRIDINES
Authors: Akiyama Tetsuo , Kitamura Tohru , Isida Tyuzo , Kawanisi Mituyosi
Published: July 2006

UV-irradiation of Δ2-tetrazolines (1) resulted in the elimination of nitrogen molecule to afford 1,2,3-trisubstituted diaziridines (2). This procedure constitutes a novel method of formation of diaziridines, especially 1-aryldiaziridines, in yields of preparative value.
THE REACTION OF TRIMETHYLSILYL SULFIDES WITH CARBOXYLIC ESTERS. A CONVENIENT METHOD FOR THE PREPARATION OF THIOLESTERS
Authors: Mukaiyama Teruaki , Takeda Takeshi , Atsumi Kunio
Published: July 2006

In the presence of AlCl3, trimethylsilyl sulfides react with carboxylic esters to give the corresponding thiolesters in high yields.
γ-INDUCED ADDITION REACTION OF METHANOL TO METHYL OLEATE
Authors: Sugii Atsushi , Shimada Seiji , Nagai Kumiko , Kitahara Kazuta
Published: July 2006

Methyl 9- and 10-methoxystearates were obtained by the γ-induced addition reaction of methanol to methyl oleate in the absence or presence of methanol. Yield of the adducts increased with the increase of methanol added in the reaction systems.
CORRELATION OF CATALYTIC ACTIVITY OF METAL IONS IN AUTOXIDATION OF 1,2-DIHYDROXYNAPHTHALENE-4-SULFONATE AND STABILITY CONSTANT OF METAL COMPLEXES
Authors: Ito Sotaro , Miura Norio
Published: July 2006

The catalytic activities of 9 metal ions in the autoxidation of potassium salt of 1,2-dihydroxynaphthalene-4-sulfonate in aqueous solution were measured. All the metal ions including the first transition metals were found to accelerate the autoxidation. The catalytic activities of the metal ions were correlated with the stability constants of the substrate-metal ion complexes.