bluuebunny/crossref_metadata_2025_split huggingface dataset:
GENERATION AND DIELS–ALDER REACTION OF 1-SILOXY-3-ARYLISOBENZOFURANS FROM 3-ARYLPHTHALIDES
Authors: Iwao Masatomo , Inoue Hisao , Kuraishi Tsukasa 
Published: July 2006

Abstract
1-t-Butyldimethylsiloxy-3-arylisobenzofurans, a new type of isobenzofurans, were generated from 3-arylphthalides by sequential treatment with LDA and TBDMSCl. The isobenzofurans, thus formed, were intercepted in situ by dimethyl fumarate to give stable Diels–Alder adducts in good yields. These adducts were converted into 4-aryl-1-naphthols by acid treatment. This new route for the preparation of naphthols was applied to the synthesis of natural arylnaphthalide lignan, diphyllin.
ELEMENTAL ANALYSIS OF ZEOLITES BY INDUCTIVELY COUPLED PLASMA EMISSION SPECTROSCOPY VIA DIRECT INJECTION
Authors: Mackey J R , Murphy W J 
Published: July 2006

Abstract
A method is described for determining the elemental analyses of zeolites in which the elements are determined as ratios of the aluminum content. This method is accurate, significantly faster and allows more rapid repeat analyses (enabling statistical significance of data to be defined) than any other technique currently available. The zeolite in a suspension of xylene is injected directly into the ICPES argon plasma and the metal ratios are measured simultaneously. This technique allows a sample turnaround time of ≈15 min with a repeat analysis every 2 min.
DSC STUDY OF POLYMORPHIC TRANSITIONS OF Dl-2-AMINOBUTYRIC ACID AND Dl-NORLEUCINE
Authors: Matsumoto Masayuki , Kunihisa Kazuko S 
Published: July 2006

Abstract
The polymorphic transitions in Dl-2-Aminobutyric acid and Dl-norleucine were studied by differential scanning calorimetry(DSC). The experimental results show that the α-form of Dl-norleucine is converted into a new γ-form at 390 K which is not the β-form or the superlattice deduced by Mathieson(Acta Crystallogr., 6, 399 (1953)) from crystal structures of α-and β-Dl-methionine, and that the value of transition heat is about 5 kJ mol−1, and is of the same order compared with that of the B-A transition in Dl-2-Aminobutyric acid.
EFFECT OF PREPARATION VARIABLES ON MORPHOLOGICAL AND CATALYTIC PROPERTIES OF PRECIPITATED NICKEL-SILICA CATALYSTS
Authors: Nitta Yuriko , Utsumi Teruo , Imanaka Toshinobu , Teranishi Shiichiro 
Published: July 2006

Abstract
Composition of the precursors and its effect on the crystallinity of Ni–SiO2 catalysts were studied using thermal gravimetry and X-ray diffraction measurement. The severer preparation conditions led to the lower proportion of NiCO3 in the precursor. The mean crystallite size of Ni in H2-reduced catalysts, and hence the activity and enantioselecivity of modified catalysts, were found to depend on the proportion of NiCO3.
DIANIONS OF N-MONOSUBSTITUTED-3-(PHENYLSULFONYL)PROPANAMIDES. CONVENIENT REAGENTS FOR THE SYNTHESIS OF 5-ALKYL-2(5H)-FURANONES
Authors: Tanaka Kazuhiko , Wakita Hisanori , Yoda Hidemi , Kaji Aritsune 
Published: July 2006

Abstract
Treatment of N-phenyl-3-(phenylsulfonyl)propanamide with 2 equiv. of butyllithium at −78 °C afforded the dianion. Aldehydes and ketones upon treatment with the dianion provided stable γ-hydroxy amides, which were converted in good yields to 5-alkyl-2(5H)-furanones. Optically active (R)- and (S)-5-octyl-2(5H)-furanones, and (R)- and (S)-5-tridecyl-2 (5H)-furanones were prepared from aldehydes and the dianions, derived from chiral N-monosubstituted-3-(phenylsulfonyl)propanamides.
A MILD REDUCTION OF ARENESULFONIC ACID AND ITS DERIVATIVES WITH DIPHOSPHORUS TETRAIODIDE
Authors: Suzuki Hitomi , Tani Hiroyuki , Osuka Atsuhiro 
Published: July 2006

Abstract
When treated with diphosphorus tetraiodide in boiling acetonitrile or under neat conditions, arenesulfonic acids, their salts, chlorides, esters, and amides are reduced to aryl disulfides in good to moderate yields.
HIGHLY ENANTIOSELECTIVE ALDOL REACTION OF METHYL KETONES VIA CHIRAL STANNOUS AZAENOLATES
Authors: Narasaka Koichi , Miwa Tetsuo , Hayashi Hiroki , Ohta Masako 
Published: July 2006

Abstract
Chiral 1,3-oxazolidines are readily prepared from methyl ketones and chiral norephedrine. Formation of stannous azaenolates from the oxazolidines and reaction with aldehydes followed by removal of the chiral auxiliary lead to the aldol products in high level of enantiomeric purity.
CONFORMATIONAL CHANGES IN SOLID FILMS AMONG α-HELICES WITH DIFFERENT HELIX SENSES AND π-HELIX FOR COPOLYMERS OF POLY (ASPARTATE ESTERS) WITH BENZYL AND (m-PHENYLAZO)BENZYL SIDE CHAINS
Authors: Ueno Akihiko , Morikawa Yasushi , Anzai Jun-ichi , Osa Tetsuo 
Published: July 2006

Abstract
Copolymers of β-(m-phenylazo)benzyl L-aspartate and β-benzyl L-aspartate exist as left-handed α-helix (αL), right-handed α-helix (αR) or π-helix (πL) in solid films at 25 °C. Conformational transitions from αL to πL and from αR to πL were found to occur by heating.
EMARKABLE ABILITY OF TETRAHYDROFLUORANTHENE IN THE LIQUEFACTION OF A SUB-BITUMINOUS COAL AT UNUSUALLY HIGH TEMPERATURE UNDER A MODERATE PRESSURE
Authors: Mochida Isao , Otani Kazumasa , Korai Yozo 
Published: July 2006

Abstract
An Australian sub-bituminous coal was effectively liquefied under high temperature short contact time conditions at about 30 kg/cm2 using 1,2,3,3a-tetrahydrofluoranthene (4HFL) as the solvent. The yields of the oil and asphaltene, the target products, were as high as 54 and 16%, respectively, for a reaction at 560 °C with zero contact time. 4HFL was principally converted into fluoranthene together with some undefined four ring aromatic compounds. The efficacy of the present liquefaction procedures is introduced.
CRYSTALLOGRAPHIC PROPERTIES OF LnCoO3(Ln = La–Eu) PEROVSKITE IN A HYDROGEN ATMOSPHERE
Authors: Arakawa Tsuyoshi , Ohara Nobuhiko , Shiokawa Jiro 
Published: July 2006

Abstract
The crystallographic properties of LnCoO3 under a hydrogen atmosphere were determined by X-ray diffraction and the thermograv-imetric analysis which were carried out to pursue in situ the reaction of reduction of LnCoO3. It was shown that the reduction process proceeded through the formation of a series of oxygen-deficient structures in keeping the perovskite structure.
AMINATED POLYSTYRENE-BOUND Rh CLUSTER CATALYSTS FOR THE WATER GAS SHIFT REACTION
Authors: Kaneda Kiyotomi , Kobayashi Masaya , Imanaka Toshinobu , Teranishi Shiichiro 
Published: July 2006

Abstract
Various aminated polystyrenes are synthesized by treatment of chloromethylated polystyrene with amines. The aminated polymers are examined as an insoluble support for Rh6(CO)16 in the water gas shift reaction (WGSR). Diethylenetriamino polymer is the most effective support for the WGSR. This heterogenization does not lower the WGSR activity in homogeneous systems.
PORTULIDE, A CLERODANE DITERPENOID FROM PORTULACA GRANDIFLORA HOOK
Authors: Ohsaki Ayumi , Matsumoto Keishi , Shibata Kozo , Tokoroyama Takashi , Miura Iwao 
Published: July 2006

Abstract
A clerodane diterpene, portulide has been isolated firstly from Portulaca grandiflora Hook and the structure also been elucidated on the basis of spectral evidences and chemical correlation.
STUDY ON THE SIZE DISTRIBUTION OF IRON PARTICLES DISPERSED IN SiO2 SUPPORT
Authors: Tanabe Syuji , Ida Takasi , Suginaga Masao , Ueno Akifumi , Kotera Yoshihide , Tohji Kazuyuki , Udagawa Yasuo 
Published: July 2006

Abstract
A new method to control the size of iron particles in Fe/SiO2 catalyst was studied. The catalyst was prepared by drying and then calcining a gel obtained by hydrolysis of the mixed solution of ethyl silicate and iron(III) nitrate dissolved in ethylene glycol. Iron particles were deposited in a controlled size level by reducing the calcined catalyst in a hydrogen stream. EXAFS and IR spectroscopies were employed to see the reason why the size of iron particles was controlled in the catalyst thus prepared.
A NOVEL ROUTE TO 5-FLUOROURACILS FROM CHLOROTRIFLUOROETHENE
Authors: Fuchikami Takamasa , Yamanouchi Akiko , Suzuki Yasuyuki 
Published: July 2006

Abstract
Diethyl fluoromalonate was prepared in one-pot from chlorotrifluoroethene via trifluoroacrylic acid lithium salt in 79% yield. Diethyl fluoromalonate was easily converted to 5-fluoro-6-chlorouracils, reductions of which gave 5-fluorouracils in good yields.
REACTIONS OF CHLOROMETHYL PHENYL SULFONE CARBANION WITH NITROBENZOPHENONES. THE VICARIOUS SUBSTITUTION OF HYDROGEN Versus THE DARZENS CONDENSATION
Authors: Makosza Mieczyslaw , Golinski Jerzy , Baran Janusz , Dziewonska-Baran Danuta 
Published: July 2006

Abstract
Carbanion of chloromethyl phenyl sulfone replaces hydrogen atoms o′- and p- to the nitro group in o-nitrobenzophenone, whereas with p-nitrobenzophenone it enters the Darzens condensation followed by rearrangement and decarbonylation. Reaction course with m-nitrobenzophenone depends on the conditions (base concetration). When an excess of a base is present the vicarious substitution of hydrogen takes place whereas low concentration of a base favours the Darzens condensation.
NUCLEOPHILIC FORMYLATION OF NITROARENES VIA VICARIOUS SUBSTITUTION OF HYDROGEN WITH TRISPHENYLTHIOMETHANE
Authors: Makosza Mieczyslaw , Winiarski Jerzy 
Published: July 2006

Abstract
Carbanion of phenyl trithioorthoformate reacts with nitroarenes according to the vicarious substitution scheme replacing hydrogen in the para position to the nitro group. The reaction offers a new method of nucleophilic formylation of nitroarenes.
HYDROXYLATION REACTION OF AROMATIC RINGS IN AQUEOUS SOLUTION INDUCED BY HYDROGEN–OXYGEN FLAME
Authors: Takasaki Michiaki , Nomoto Shinya , Harada Kaoru 
Published: July 2006

Abstract
It was found that direct hydroxylation of aromatic rings proceeded in aqueous solution of phenyl-containing amino acids by using hydrogen–oxygen flame and that the active species of the reaction could be considered as hydroxyl radicals generated in the burning flame.
CRYSTAL STRUCTURES OF HEPTAKIS(2,6-DI-O-METHYL)-β-CYCLODEXTRIN COMPLEXES WITH p-IODOPHENOL AND p-NITROPHENOL
Authors: Harata Kazuaki 
Published: July 2006

Abstract
Crystal structures of heptakis (2,6-di-O-methyl)-β-cyclodextrin (dimethyl-β-CDx) complexes with p-iodophenol and p-nitrophenol were determined by the X-ray method. The dimethy1-β-CDx molecule is in the round shape, which is maintained by the intramolecular hydrogen bonds formed between adjacent 2,6-di-O-methylglucose residues. The guest molecules in both complexes are not included within the host cavity, but located in intermolecular spaces between dimethyl-β-CDx molecules. The host cavity includes three water molecules and a methoxyl group of adjacent dimethyl-β-CDx.
CRYSTAL STRUCTURE OF (BMDT-TTF)3ClO4(1,2-DICHLOROETHANE). MOLECULAR DESIGN FOR THE MULTI-DIMENSIONAL MOLECULAR CONDUCTOR
Authors: Kato Reizo , Kobayashi Hayao , Kobayashi Akiko , Sasaki Yukiyoshi 
Published: July 2006

Abstract
In the crystal of (BMDT-TTF)3ClO4(1,2-dichloroethane), inclined BMDT-TTF (bis(methylenedithio)TTF) molecules with dihedral angles of 57–58° construct the two-dimensional S···S network parallel to the ac plane. The steric and electronic features of BMDT-TTF suggest that BMDT-TTF will take a wide variety of the molecular arrangement which lead to the multi-dimensional molecular conductors.
BINDING BEHAVIOR OF ANTITUMOR R,R-1,2-CYCLOHEXANEDIAMINE PLATINUM(II) WITH OLIGONUCLEOTIDES AND DNA
Authors: Inagaki Kenji , Kasuya Kyoko , Kidani Yoshinori 
Published: July 2006

Abstract
Platinum modified oligonucleotides (5′-d(CpCpGpG)-3′ and 5′-d(GpGpCpC)-3′) and DNA were digested by endo- and exo-nuclease and the products digested were identified by means of HPLC. R,R-1,2-Cyclohexanedlamlne platinum(II) complex selectively binds to guanine residues to form intrastrand crosslink between two adjacent guanine bases through N(7)–N(7) sites.
DIRECT PHOTOLYSIS AT 185 nm OF 1-ALKENES IN SOLUTION. MOLECULAR ELIMINATION OF TERMINAL HYDROGENS
Authors: Inoue Yoshihisa , Mukai Toshio , Hakushi Tadao 
Published: July 2006

Abstract
Direct irradiations at 185 nm of 1-octene and 2-methyl-1-pentene in pentane gave alkylidene carbenes through the molecular elimination of terminal hydrogens, as well as double-bond migration products via 1,3-shift of allylic hydrogen and radical-derived products.
TRITYL PERCHLORATE AS AN EFFICIENT CATALYST IN THE ALDOL-TYPE REACTION
Authors: Mukaiyama Teruaki , Kobayashi Shu , Murakami Masahiro 
Published: July 2006

Abstract
In the presence of a catalytic amount of trityl perchlorate, silyl enol ethers and ketene silyl acetals react with acetals and methyl orthoformate to give the corresponding aldol-type addition products in good yields.
STEREOCONTROLLED TOTAL SYNTHESIS OF (+)-ASTEROMURIN A, A PICROTOXANE SESQUITERPENE ISOLATED FROM THE SCALE INSECT ASTEROCOCCUS MURATAE KUWANA
Authors: Wakamatsu Kazumasa , Niiyama Kenji , Niwa Haruki , Yamada Kiyoyuki 
Published: July 2006

Abstract
The first total synthesis of (+)-asteromurin A, a picrotoxane sesquiterpene isolated from the scale insect Asterococcus muratae KUWANA is described.
PROPENE OLIGOMERIZATION OVER TiO2–ZrO2 CATALYSTS
Authors: Espinoza Rafael L , Scurrell Michael S , Walsem Hendrik J Van 
Published: July 2006

Abstract
Titania–zirconia mixed oxides may be prepared in high specific area form, and with or without nickel are active as catalysts for the oligomerization of propene. The presence of nickel favors the formation of oligomers containing more than ten carbon atoms per molecule.
NEW SYNTHETIC METHOD OF (Z)-4-ALKENOIC ACIDS USING RING-OPENING REACTION OF (Z)-4-HEXENOLIDE WITH ORGANOCOPPER REAGENT
Authors: Fujisawa Tamotsu , Umezu Kazuto , Kawashima Masatoshi 
Published: July 2006

Abstract
(Z)-4-Hexenolide reacted regioselectively with diorganocuprates to give (Z)-4-alkenoic acids in high yields. Synthetic utility was demonstrated by the convenient synthesis of cis-jasmone.
KINETIC STUDIES ON THE HIGH-PRESSURE DIELS–ALDER REACTION OF TROPONE WITH MALEIC ANHYDRIDE
Authors: Takeshita Hitoshi , Sugiyama Shigeru , Hatsui Toshihide 
Published: July 2006

Abstract
The rates and activation parameters of the (4+2)π cycloaddition of tropone with maleic anhydride were measured in the range of 105–135 °C at pressures up to 2000 bar in cumene and in DMF. The values of activation volume and the volume change of reaction revealed a deviation to a great extent from those of (6+4)π process of tropone with cyclopentadiene, but to a small extent from the other (4+2)π process.
POLYMER-SUPPORTED QUATERNARY AMMONIUM CYANIDES AND THEIR USE AS CATALYSTS IN THE BENZOIN CONDENSATION
Authors: Castells Josep , Duñach Elisabet 
Published: July 2006

Abstract
Polymer-supported quaternary ammonium cyanides, active as catalysts in the benzoin condensation, were prepared by using a Merrifield resin as starting material. Participation of the ammonium counter-ion in the transition state of the benzoin condensation is shown by the optical activity of benzoin when a chiral ammonium cyanide is used as the catalyst.
STRUCTURE OF GÜIMAREDIOL, A NEW REARRANGED SESQUITERPENOID FROM THE RED ALGA LAUBENCIA SP.
Authors: Gonzalez Antonio G , Martin Julio D , Martin Victor S , Perez Ricardo , Drexler Steven A , Clardy Jon 
Published: July 2006

Abstract
The structure of güimarediol, a new brominated tricyclic sesquiterpene with a new rearranged isoprenoid skeleton isolated from the red seaweed Laurencia sp., was determined by spectroscopic methods and X-ray crystallography.
MERCURY(II)-ADSORPTIVITY OF LIQUID POLYBUTADIENE-INORGANIC SUPPORT SYSTEM
Authors: Ikeda Isao , Shibata Yukio , Kishimoto Yoshihisa , Okahara Mitsuo 
Published: July 2006

Abstract
The liquid polybutadiene-silica gel system revealed the good adsorptivity toword mercury(II) in water, and the concentration of mercury(II) was reduced from 380 ppm to 0.3 ppm by shaking with this adsorption system in a batch process.
DETERMINATION OF CHEMICALLY BOUND OXYGEN BY 15O-O TRACER METHOD. APPLICATION TO HEMOGLOBIN- AND SYNTHETIC HEME-BOUND OXYGEN
Authors: Yuasa Makoto , Ogata Yoshitaka , Nishide Hiroyuki , Tsuchida Eishun , Iwamoto Masako , Nozaki Tadashi 
Published: July 2006

Abstract
Oxygen-15 radiotracer method was applied to the determination of chemically bound oxygen. Volume of oxygen bound with red blood cell suspension or with synthetic heme was evaluated within an error of ca. ±5%.
SYNTHESIS OF OPTICALLY ACTIVE PSEUDO-α-d-GLUCOSE AND PSEUDO-β-l-ALTROSE
Authors: Suami Tetsuo , Tadano Kin-ichi , Kameda Yukiaki , Iimura Youichi 
Published: July 2006

Abstract
Optically active two pseudo-sugars, pseudo-α-d-glucose and pseudo-β-l-altrose have been synthesized by cyclization of 2,3,4-tri-O-benzyl-5-deoxy-5-iodo-l-arabinose with dimethyl malonate in the presence of sodium hydride as a key reaction.
A FACILE ENTRY TO 3-(1-HYDROXYETHYL)-2-AZETIDINONES FROM METHYL (R)-3-HYDROXYBUTANOATE BASED ON THE ESTER ENOLATE-ALDIMINE CONDENSATION
Authors: Chiba Toshiyuki , Nagatsuma Masako , Nakai Takeshi 
Published: July 2006

Abstract
The reaction of the dianion of methyl (R)-3-hydroxybutanoate with the N-silylimine generated from trimethylsilylpropynal afforded (3R,4S)-3-[(R)-1-hydroxyethyl]-4-trimethylsilylethynyl-2-azetidinone as the major product, of which the stereochemistry was assigned through its stereospecific conversion to the (+)-4-acetoxy derivative.
REACTION OF PROPARGYL BROMIDE AND TRIMETHYLSILYLPROPARGYL IODIDE WITH METALLIC TIN, ALUMINUM, AND ALDEHYDES OR KETONES. SELECTIVE SYNTHESIS OF β-ACETYLENE, β-TRIMETHYLSILYLACETYLENE, AND α-TRIMETHYLSILYLALLENE ALCOHOLS
Authors: Nokami Junzo , Tamaoka Takashi , Koguchi Tadao , Okawara Rokuro 
Published: July 2006

Abstract
β-Acetylenic and α-allenic alcohols were synthesized selectively by the reaction of aldehydes and ketones with organotin compounds prepared by treatment of propargyl bromide or trimethylsilylpropargyl iodide with metallic tin and aluminum in a suitable solvent.
DOUBLY-CHELATED CYCLOPALLADATED COMPLEXES OF 1,3-BIS(2-PYRIDYL)PROPANE
Authors: Hiraki Katsuma , Fuchtta Yoshio , Matsumoto Yasuhiro 
Published: July 2006

Abstract
1,3-Bis(2-pyridyl)propane reacted with palladium(II) acetate in acetic acid at 100 °C, resulting in the formation of a brown oil. The oil was treated with lithium chloride to give a doubly-chelated cyclopalladated complex, [Pd{(C5H4N)CH2CHCH2(C5H4N)}Cl].
ELECTRODE REACTIONS OF THIOCYANATOPENTACYANOCOBALTATE(III) COMPLEX
Authors: Maki Nobufumi , Kato Takashi 
Published: July 2006

Abstract
It has been difficult to judge decisively whether the [CoII(CN)5]3−/[CoI(CN)5]4− system is nernstian or not, since the [CoI(CN)5]4− ion extracts a proton from water to dimerize itself into an electroinactive dimeric species, [{CoI(CN)5}2H]7−. The present study affirmed that a completely reversible electrode reaction of the Co(II)/Co(I) couple proceeds in 100% dimethyl sulfoxide. The standard electrode potential of the [CoII(CN)5]3−/[CoI(CN)5]4− couple was −1.272 V vs. NHE at (25±0.1) °C (ΔG°=+122.7 kJ mol−1).
TRIALKYLBORANE-INDUCED CHLORINATIONS OF ALKANE WITH CHLORINE, t-BUTYL HYPOCHLORITE AND N-CHLOROSUCCINIMIDE
Authors: Hoshi Masayuki , Masuda Yuzuru , Arase Akira 
Published: July 2006

Abstract
Trialkylboranes initiated the chlorinations of alkanes with radical chlorinating agents such as chlorine, t-butyl hypochlorite and N-chlorosuccinimide. The reactions proceeded at 20 °C even in the dark giving monochloroalkanes.
PHOTOCYCLOBUTENOLIZATION OF 2,4,6-TRIISOPROPYLBENZOPHENONE AND ITS DERIVATIVES STUDIED BY PICO- AND NANOSECOND SPECTROSCOPY
Authors: Nakayama Toshihiro , Hidaka Toshiharu , Kuramoto Tetsunobu , Hamanoue Kumao , Teranishi Hiroshi , Ito Yoshikatsu , Matsuura Teruo 
Published: July 2006

Abstract
By pico- and nanosecond spectroscopy methods, the transient absorption spectra and lifetimes of the triplet states of 2,4,6-triisopropylbenzophenones, the 1,4-biradicals and the dienols were measured. The decays of the T′←T1 absorptions were accompanied by the rate matching increase in the absorptions -of the biradicals.
A NOVEL SYNTHESIS OF DIALKYL KETONES AND α-SULFENYLATED CARBONYL COMPOUNDS FROM α,β-EPOXY SULFOXIDES
Authors: Satoh Tsuyoshi , Kaneko Youhei , Kumagawa Takumi , Izawa Takao , Sakata Kiichi , Yamakawa Koji 
Published: July 2006

Abstract
Treatment of α,β-epoxy sulfoxides with excess sodium phenylselenide and various kinds of alkylthiolates gave dialkyl ketones and α-sulfenylated carbonyl compounds, respectively, in good yields under mild conditions.
CATALYTIC ASSAY OF l-LACTATE OR PYRUVATE WITH AN ENZYME ELECTRODE BASED ON IMMOBILIZED LACTATE OXIDASE AND LACTATE DEHYDROGENASE
Authors: Mizutani Fumio , Shimura Yukio , Tsuda Keishiro 
Published: July 2006

Abstract
An enzyme electrode using immobilized lactate oxidase and lactate dehydrogenase is prepared for the catalytic assay of l-lactate or pyruvate: the rate of the circulating enzymatic reactions between l-lactate and pyruvate is monitored by an oxygen electrode. Either of the substrates is determined in the concentration range 0.08–8 μM.
ACID-CATALYZED CYCLIZATION OF OCTADIENYNE DERIVATIVES. FACILE FORMATION OF CYCLOPENTADIENE, ISOBENZOTHIOPHENE, AND 18-MEMBERED CYCLIC ETHER
Authors: Iyoda Masahiko , Tanaka Shigeyoshi , Aso Yoshio , Nakagawa Masazumi 
Published: July 2006

Abstract
Treatment of substituted octa-2,6-dien-4-yne-1,8-dial derivatives with CF3COOH gave cyclopentadiene, thiophene, or isobenzothiophene derivatives. Formation of an 18-membered cyclic ether was observed in the case of octa-2,7-dien-4-yne-1,6-diol derivative.
NICKEL CATALYZED LOW TEMPERATURE GASIFICATION OF GRAPHITE BY CARBON DIOXIDE
Authors: Yamada Tetsuo , Suzuki Tsutomu , Homma Tsuneyuki 
Published: July 2006

Abstract
Gasification of various graphites mechanically mixed with nickel catalysts by carbon dioxide was carried out in a thermobalance at temperatures up to 1000 °C. It was observed that some graphites gave large weight loss in the low temperature region of 500–750 °C. The weight loss in this region were increased with increase of the catalyst loading until graphite was completely gasified.
A STEADY STATE APPROXIMATION OF POPULATION DENSITY DISTRIBUTIONS OF ARGON ATOMS IN AN INDUCTIVELY COUPLED PLASMA AS AN EXCITATION SOURCE FOR ATOMIC SPECTROMETRY
Authors: Hasegawa Tetsuya , Fuwa Keiichiro , Haraguchi Hiroki 
Published: July 2006

Abstract
The population density distributions of argon atoms in an inductively coupled plasma (ICP) are calculated based on the collisional-radiative model under a steady state approximation. The results obtained help to interpret the physical states of the argon plasma and to elucidate the characteristics of the ICP as an excitation source for spectrochemical analysis.
PHYSICOCHEMICAL PROPERTIES OF 3,6-DI-t-BUTYL-1,4-DIHYDROPYRROLO[3,2-b]PYRROLE AND ITS N-METHOXYCARBONYL DERIVATIVES
Authors: Satake Kyosuke , Kumagai Tsutomu , Mukai Toshio 
Published: July 2006

Abstract
3,6-Di-t-butyl-1,4-dihydropyrrolo[3,2-b]pyrroles and its N-methoxycarbonyl derivatives were synthesized and their IR, NMR, and UV spectra as well as the oxidation potentials were measured. On the basis of these data, aromaticity and basicity of this novel 10π-aromatic system 1,4-dihydropyrrolo [3,2-b]pyrrole were discussed.
A NEW POLYMORPH OF METAL-FREE PHTHALOCYANINE
Authors: Takano Shigemasa , Enokida Toshio , Kakuta Atsushi , Mori Yasuki 
Published: July 2006

Abstract
The spectroscopic characterization of a novel polymorph of metal-free phthalocyanine(τ-form), showing the particular X-ray diffraction peaks, was investigated by comparing the other polymorphs. In this paper, the precise ir spectrum obtained by FTIR and visible absorption spectrum of the τ-form are reported.
A CONVENIENT SYNTHESIS OF N-BROMOAMIDES BY USE OF SODIUM BROMITE
Authors: Kajigaeshi Shoji , Nakagawa Takashi , Fujisaki Shizuo 
Published: July 2006

Abstract
Reaction of aliphatic and aromatic amides in acetic acid with aqueous sodium bromite (NaBrO2) under mild conditions gave N-bromoamides in fairly good yields.