bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Infrared Spectroscopic Study of Acrylonitrile Adsorbed on Silica-Supported Copper Catalyst
Authors: Sugiyama Kazuo , Miura Hiroshi , Sekiwa Hideyuki , Matsuda Tsuneo 
Published: July 2006

Abstract
Adsorption state of acrylonitrile on Cu catalyst was studied by means of infrared spectroscopy. The C≡N stretching vibration of acrylonitrile adsorbed on Cu was appreciably shifted to lower frequency regions in comparison with that in liquid-state. The π-component coordination of cyano group in acrylonitrile with Cu surface site was suggested.
Reaction of Alcohol with NO2 on a Cleaned Glass Surface
Authors: Maeda Yasuaki , Fujio Yoshifumi , Munemori Makoto 
Published: July 2006

Abstract
Formation of alkyl nitrite from alcohol and NO2 was very fast on a Pyrex glass surface cleaned with chromic acid mixture. The reaction was practically zero order with respect to alcohol and second order with respect to NO2. The rate constant was (1.7±0.08)×10−18 cm−3 molecule−1 s−1 for methyl nitrite formation and the apparent activation energy was −53.5 kJ mol−1.
FLOW POLAROGRAPHY OF SODIUM(I) IN AIR-SATURATED SOLUTIONS
Authors: Hara Minoru , Nomura Noboru 
Published: July 2006

Abstract
Modified normal pulse polarography was applied to the determination of sodium(I) in flowing solutions. The interferences from dissolved oxygen and hydrogen ions were avoided by measuring the oxidation current of amalgamated sodium which is formed in pulse duration. This method is useful for the determination of metal ions in fluid streams.
EXTRACTION OF COBALT(II), NICKEL(II), AND COPPER (II) FROM STRONGLY ALKALINE MEDIA BY 4-n-DODECYL-6-(2-THIAZOLYLAZO)RESORCINOL
Authors: Matsunaga Hideyuki , Suzuki Toshishige M 
Published: July 2006

Abstract
A new extracting reagent, 4-n-dodecyl-6-(2-thiazolylazo)resorcinol, has been synthesized. The extraction characteristics of this reagent have been examined for several heavy metal ions. Cobalt(II), nickel(II), and copper(II) can be extracted into 4-methyl-2-pentanon from strongly alkaline solutions without additional organic reagents such as quarternary ammonium salts.
PHOTOCYCLOADDITION REACTION OF 1,4,5,8-TETRAAZAPHENANTHRENE WITH SOME OLEFINS
Authors: Shim Sang Chul , Park Seung Ki 
Published: July 2006

Abstract
Irradiation of 1,4,5,8-tetraazaphenanthrene with some olefins such as trans-1,2-dichloroethylene, vinyl bromide, acrylonitrile, and 2-chloroacrylonitrile gave [2+2] cycloadducts. The stereochemistry of cycloadducts, quantum yield measurements, sensitization, and quenching studies indicate the reaction to proceed through a triplet excited state.
A NOVEL SYNTHESIS OF 2-BENZOTHIAZOLAMINE AND ITS DERIVATIVES BY A NICKEL(0)-CATALYZED REACTION OF 1,2-AMINOIODOARENES WITH THIOUREAS
Authors: Takagi Kentaro 
Published: July 2006

Abstract
In the presence of a nickel(0) complex, 1,2-aminoiodoarenes underwent the reaction with thioureas to provide a facile, site-specific, and general synthetic procedure of 2-benzothiazolamine and its derivatives under non-oxidative conditions.
ELECTROCHEMICALLY SWITCHED CATION BINDING IN PENTAOXA [13] FERROCENOPHANE
Authors: Saji Tetsuo 
Published: July 2006

Abstract
The effects of cations on the half-wave potential for oxidation of pentaoxa [13] ferrocenophane (1) in dichloromethane were studied. The shift of the half-wave potential by the addition of alkaline cations shows the abrupt decrease of the binding constant of 1 with cations upon electrochemical oxidation.
A NOVEL RHODIUM-TRI-N-ALKYLPHOSPHINE CATALYST SYSTEM FOR THE HYDROGENATION OF CARBON MONOXIDE, FORMALDEHYDE, AND GLYCOLALDEHYDE
Authors: Watanabe Eiichi , Hara Yoshinori , Wada Keisuke , Onoda Takeru 
Published: July 2006

Abstract
Syngas treatment of a mixture from rhodium compound, a large equimolar tri-n-alkylphosphine, or tri(α-nonsubstituted alkyl)phosphine, and a solvent gives rise to an orange yellow solution, which is a highly active catalyst for hydrogenation of carbon monoxide to ethylene glycol and methanol. Similarly, under syngas condition, formaldehyde and glycolaldehyde are effectively hydrogenated to methanol and ethylene glycol, respectively, by the same orange yellow catalyst solution.
SELECTIVE FORMATION OF METHANOL OVER WATER-TREATED RANEY RUTHENIUM
Authors: Yano Toshiyuki , Ogata Yoichi , Aika Ken-ichi , Onishi Takaharu 
Published: July 2006

Abstract
Methanol was obtained as a main product from CO and H2 over water-treated Raney-Ru, although hydrocarbons were exclusively obtained over Ru powder. The C-base selectivity to methanol was 73% at 353 K under a total pressure of 600 Torr (1 Torr = 133.3 Pa). The selectivity was increased with an increase of the Al content. XPS studies showed that the surface Al was oxidized by water treatment above 473 K, which was necessary for methanol formation.
PICOSECOND PULSE RADIOLYSIS STUDIES OF THE SHORT LIVED CATION PRODUCED IN BUTYLCHLORIDE AND BUTYLBROMIDE
Authors: Sumiyoshi Takashi , Yamada Tatsuya , Ohtaka Akira , Tsugaru Kazunori , Katayama Meiseki 
Published: July 2006

Abstract
Transient species produced in neat butylchloride and butylbromide were observed by means of picosecond pulse radiolysis. The visible band which was produced during electron pulse and then decayed with a half lifetime of 2 ns was assigned to a vibrationally excited cation.
TETRATELLURADICYCLOPENTA[b,g]NAPHTHALENE (TTeDCN)
Authors: Okada Naoko , Saito Gunzi , Mori Takehiko 
Published: July 2006

Abstract
The first synthesis of tetratelluradicyclopenta[b,g]naphthalene (TTeDCN), which is a six-membered ring isomer of hexamethylenetetratellurafulvalene (HMTTeF), is reported. TTeDCN is obtained as yellow microcrystals and gives green single crystals in which TTeDCN forms a complex with HMTTeF in 1:1 molecular ratio.
DETERMINATION OF COBALT IN NATURAL WATERS BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY AFTER MICRO SOLVENT EXTRACTION WITH CAPRIQUAT
Authors: Shimizu Tokuo , Koyanagi Hidenobu , Shijo Yoshio , Sakai Kaoru 
Published: July 2006

Abstract
Cobalt is extracted as the thiocyanato complex with trioctylmethylammonium chloride(Capriquat) in o-dichlorobenzene, and determined by graphite furnace atomic absorption spectrometry using pyrolytic graphite coated tube. At the sampling point, the proposed method was applied. The organic phase separated was stored in a refrigerator, and determined in the laboratory within a day.
MOLECULAR DESIGN OF SYNTHETIC LIPIDS FORMING INVERTED HEXAGONAL PHASE
Authors: Murakami Yukito , Kikuchi Jun-ichi , Takaki Toshihiko , Uchimura Katsuya 
Published: July 2006

Abstract
The inverted hexagonal phase was formed with mixed lipid systems composed of two species of synthetic lipids, the one having two quinoyl moieties and the other holding a single hydroxyl moiety as their head groups, as confirmed by negative staining electron microscopy and selected area electron diffraction measurements.
COLLOIDAL PLATINUM PROTECTED BY POLYMERIZED MICELLE. PREPARATION AND APPLICATION TO CATALYSIS FOR PHOTOCHEMICAL HYDROGEN GENERATION FROM WATER
Authors: Toshima Naoki , Takahashi Tadahito , Hirai Hidefumi 
Published: July 2006

Abstract
Colloidal platinum protected by polymerized micelle was prepared by photoreduction of chloroplatinic acid in the presence of unsaturated surfactants and the subsequent UV-polymerization of the surfactants. This colloidal platinum acts as an active catalyst for photochemical hydrogen generation from water in the system of EDTA/Ru(bpy)32+/MV2+.
N-(ω-TOSYLOXYALKYL)PHTHALIMIDES AS REACTIVE GENERAL SYNTHONS FOR INTRODUCING ALKYLAMINO GROUPS AND THEIR APPLICATION FOR THE “SELF-PROLIFERATIVE” SYNTHESIS OF OPEN-CHAIN POLYAMINES
Authors: Iwata Masaaki , Kuzuhara Hiroyoshi 
Published: July 2006

Abstract
New synthetic routes to N-(ω-tosyloxyalkyl)phthalimides (2) were developed and the synthetic utility of 2 as alkylating reagents was exemplified in the open-chain polyamine synthesis involving the “self-proliferative” process.
CONTROL OF Ni DISTRIBUTION IN Al2O3 SUPPORT USING ALKOXIDE TECHNIQUE
Authors: Fujiyama Takeshi , Tsuiki Hideyasu , Ueno Akifumi 
Published: July 2006

Abstract
The distribution of nickel atoms in alumina spheres was well controlled by varying impregnation period when the alumina spheres are immersed in a solution composed of nickel-ethlene glycolate and ethyl silicate.
EFFECTS OF CYCLODEXTRIN ON ENHANCEMENT FOR CHEMILUMINESCENCE OF THE LUMINOL RELATED COMPOUND
Authors: Karatani Hajime 
Published: July 2006

Abstract
The chemiluminescence of 6-[N-(4-aminobutyl)-N-methyl]amino-2,3-dihydro-1,4-phthalazine dione(aminobutylmethylisoluminol:ABMI) in an alkaline aqueous solution was found to be enhanced by adding β-cyclodextrin(β-CD) to the reaction system. In this case, β-CD exhibited both effects of an increase in the fluorescence quantum yield of the emitter (Φfl) and an increase in the fraction of molecules of the intermediate which cross over to the excited state of the product(Φes).
SUBSTANCE P ANALOGUES CONTAINING p-FLUORO-l-PHENYLALANINE
Authors: Tanaka Hisanori , Osakada Fumio , Ohashi Shin-ichi , Shiraki Masaru , Munekata Eisuke 
Published: July 2006

Abstract
Three substance P analogues containing p-fluoro-l-phenylalanine were synthesized by Merrifield’s solid phase method. The spectroscopic behaviors in CD- and 19F NMR-spectra as well as pharmacological properties of the fluorine containing substance P analogues are described.
ELECTROREDUCTIVE N-ALKYLATION OF AMIDES, CARBAMATES, AND N-HETEROCYCLES
Authors: Shono Tatsuya , Kashimura Shigenori , Nogusa Hideo 
Published: July 2006

Abstract
The N-alkylation of amides, lactams, carbamates, and N-heterocycles was easily attained in good yields by the electroreduction of the substrates in the presence of alkyl halides.
CRYSTAL STRUCRTURE OF α-(BEDT-TTF)3(ReO4)2
Authors: Kanbara Hirohisa , Tajima Hiroyuki , Aratani Sukekazu , Yakushi Kyuya , Kuroda Haruo , Saito Gunzi , Kawamoto Atsushi , Tanaka Jiro 
Published: July 2006

Abstract
The two-dimensional strucrture of α-(BEDT-TTF)3(ReO4)2 on the (010) plane is very similar to that of (BEDT-TTF)3(ClO4)2, although the three dimensional structure is quite different from each other. The slight geometrical difference between the crystallographically independent molecules suggests the different formal charge of these molecules.
SURFACE POTENTIAL STUDIES ON CATION BINDING CHARACTERISTICS OF THE MONOLAYER OF CROWN ETHER HAVING A LONG HYDROCARBON CHAIN
Authors: Matsumura Hideo , Furusawa Kunio , Inokuma Seiichi , Kuwamura Tunehiko 
Published: July 2006

Abstract
The surface potential measurement of monolayer showed that there exists a possibility for determining binding constants of several metal cations with 18-crown-6 when they exist in interfacial circumstances by introducing a long hydrocarbon chain to the crown ether.
ORGANIC SYNTHESIS USING HALOBORATION REACTION. A DIRECT AND SELECTIVE SYNTHESIS OF (Z,Z)-1-BROMO-1,3-DIENES BY USING HALOBORATION-HYDROBORATION OF TWO ALKYNES
Authors: Hyuga Satoshi , Takinami Satoru , Hara Shoji , Suzuki Akira 
Published: July 2006

Abstract
Bis(2-bromo-1-alkenyl)bromoboranes, readily obtainable by the bromoboration of 1-alkynes with tribromoborane, have been found to be converted in situ into the corresponding borohydrides by the reduction with diisobutylaluminum hydride. Such borohydrides are effective as hydroborating agents for internal alkynes to provide bis(bromoalkenyl)(alkenyl)boranes, which react with iodine in the presence of potassium acetate to give (Z, Z)-1-bromo-1,3-dienes, specifically.
SYNTHESIS AND PROPERTIES OF MEMBRANOUS SURFACTANTS BEARING AN ANION-CAPPED CROWN RING AS A HEAD GROUP
Authors: Shinkai Seiji , Nakamura Shinichiro , Manabe Osamu , Yamada Tetsuhiro , Nakashima Naotoshi , Kunitake Toyoki 
Published: July 2006

Abstract
Membrane-forming dialkyl amphiphiles (2a and 2b) bearing an anion-capped crown ether ring as a head group were synthesized. The CMC of 2b, as well as that of a single-chain analogue, was enhanced only on the addition of K+ (salt-in effect). Electron microscopy established that 2b forms lamellar and rod-like aggregates at pH 6.0. This is the first substantial example for the membrane formation from crown-containing dialkyl amphiphiles.
THE PHOSPHA-COPE REARRANGEMENT OF 3-ARYL-3λ-PHOSPHA-1,5-HEXADIENE DERIVATIVES
Authors: Kawashima Takayuki , Miki Yasuaki , Tomita Tetsuji , Inamoto Naoki 
Published: July 2006

Abstract
The title compounds were refluxed in hexanol to give quantitatively the O-hexyl aryl-4-pentenylphosphinate derivatives via transient monomeric metaphosphinates, which seem to be formed by the phospha-Cope rearrangement. Kinetic studies show that the reaction rate increases with an increase in the magnitude of the positive charge on the phosphorus atom.
A CONVENIENT SYNTHESIS OF DIAZO COMPOUNDS BY CATALYTIC DEHYDROGENATION OF HYDRAZONES WITH COBALT SCHIFF BASE COMPLEX-OXYGEN SYSTEM
Authors: Nishinaga Akira , Yamazaki Shigekazu , Matsuura Teruo 
Published: July 2006

Abstract
Cobalt Schiff base complex catalyzed oxidation of hydrazones is found to be a convenient method for the synthesis of diazo compounds.
NEW CHIRAL STATIONARY PHASES FOR THE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC RESOLUTION OF ENANTIOMERS
Authors: Saigo Kazuhiko , Chen Yun , Kubota Naomi , Tachibana Kouzou , Yonezawa Noriyuki , Hasegawa Masaki 
Published: July 2006

Abstract
Optically active polyamides were synthesized from (−)-1,2-diphenylethylenediamine and diacid chlorides by low temperature solution polycondensation. The polyamides were found to be effective as chiral stationary phases for direct HPLC resolution of enantiomers such as trans-1,2-cyclobutanedicarboxanilide, Troger base, 2,2′-dihydroxy-1,1′-binaphthyl, mandelamide, benzyl mandelate, and benzoin.
STEREOCONTROLLED SYNTHESIS OF SEGMENTS FOR THE SYNTHESIS OF TYLONOLIDE BY USING A RELATIVE 1,2-ASYMMETRIC INDUCTION
Authors: Kitano Yasunori , Kusakabe Masato , Kobayashi Yuichi , Sato Fumie 
Published: July 2006

Abstract
Two precursors corresponding to the C(1)–C(9) and C(13)–C(17) portions of tylonolide were synthesized in which all the chiral centers were induced correctly from the only one stereocenter existing in 2-methy-3-trimethylsilylbut-3-enal and 2-benzyloxymethyl-3-trimethylsilylbut-3-enal, respectively.
REACTIVE LATTICE OXYGEN IN MULTICOMPONENT BISMUTH MOLYBDATE CATALYST FOR OLEFIN OXIDATION
Authors: Matsuura Ikuya , Hashiba Hideto , Kanesaka Isao 
Published: July 2006

Abstract
Position of the reactive lattice oxygen in the multicomponent bismuth molybdate catalyst was determined based on the isotope shift in Mo–O stretching vibration by measuring infrared and Raman spectra of the 18O-substituted catalyst with propylene oxidation using 18O2 tracer. It was proven that the oxidation reaction of olefin proceeds in accordance with the “water tank model” proposed by Moro-oka.
TWO INTERMEDIATES OBSERVED IN THE GRIGNARD REACTION WITH BENZOPHENONE
Authors: Maruyama Kazuhiro , Hayami Jun-ichi , Katagiri Toshimasa 
Published: July 2006

Abstract
Intermediates in the reaction of Grignard reagent with benzophenone in THF were investigated by both ESR and stopped-flow techniques. The short-lived (blue colored) and other long-lived (pink colored radical) intermediates were observed. The pink colored radical intermediate could be in a state of dimeric aggregate of benzophenone anion radicals ion-paired with Grignard cation [“RMgBr”]\overset+• in solution.
A TOTAL SYNTHESIS OF (±)-WIDDROL. SYNTHETIC APPLICATION OF THE FORMAL BRIDGEHEAD SUBSTITUTION OF 1-METHOXYBICYCLO[3.2.2]NON-6-EN-2-ONES WITH ALKYL GROUPS
Authors: Uyehara Tadao , Yamada Jun-ichi , Furuta Toshiaki , Kato Tadahiro 
Published: July 2006

Abstract
The [6–7] fused-ring sesquiterpene (±)-widdrol has been prepared stereospecifically utilizing the characteristic reactions of the bridged polycyclic compounds derived from 1-methoxy-5-methylbicyclo[3.2.2]non-6-en-2-one.
REGIOSELECTIVE REDUCTION OF POLYKETONES ON SILICA GEL SURFACE WITH BORANE–TRIMETHYLAMINE COMPLEX
Authors: Gohzu Shun-ichi , Tada Masahiro 
Published: July 2006

Abstract
Steroidal diones and trione, bicyclic diones (7 and 8) and a tricyclic dione were adsorbed on silica gel and reduced with BH3.NMe3. The carbonyl groups at C-3 of the steroids, at C-4 of 7 and at C-3 of 8 were reduced regioselectively. The FT-IR spectra of 5α- and 5β-androstane-3,17-dione adsorbed on silica gel were measured.
HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC CHARACTERIZATION OF THE ROLE OF INORGANIC PYROPHOSPHATASE IN REGULATING THE REACTION OF URIDINE 5′-TRIPHOSPHATE WITH GLUCOSE 1-MONOPHOSPHATE
Authors: Hirano Hisanobu , Baba Yoshinobu , Yoza Norimasa , Ohashi Shigeru 
Published: July 2006

Abstract
Inorganic pyrophosphatase ( EC 3.6.1.1 ) catalyzing the hyrolysis of inorganic pyrophosphate drived the reaction of uridine 5′-triphosphate with glucose 1-monophosphate in the direction of uridine 5′-diphosphoglucose formation. The kinetic data in vitro supported the concept that inorganic pyrophosphate might be involved as one of products and its concentration level might regulate the above reaction in metabolic process.
THE MOLECULAR STRUCTURE OF DITHIA[3.3]AZULENOMETACYCLOPHANE AND ITS PYRIDINE ANALOGUES
Authors: Fukazawa Yoshimasa , Usui Shuji , Shiokawa Toshihiro , Tsuchiya Jun 
Published: July 2006

Abstract
The preferred conformation of three dithia[3.3]azulenophanes have been determined to be the syn by X-ray crystallographic analysis and it is further ascertained by the molecular mechanics method using the MMPI program.
PORPHYRIN ANION RADICALS DETECTED BY CIDNP TECHNIQUE. FIRST OBSERVATION OF CIDNP SIGNALS DUE TO PORPHYRIN IN THE PHOTOREACTION BETWEEN PORPHYRIN AND PHENOLS
Authors: Maruyama Kazuhiro , Furuta Hiroyuki 
Published: July 2006

Abstract
Photo-CIDNP signals due to porphyrin were observed for the first time in the photoreaction of porphyrin and phenols in benzene. The intensities of CIDNP signals increased in proportion to the oxidation potential of phenol compounds. Relative magnitude of hyperfine coupling constants of porphyrin anion radicals is discussed.
A NOVEL AND USEFUL SYNTHETIC WAY TO CHIRAL α-SULFINYL CYCLIC KETONES BY THE ACID-CATALYZED REACTION OF ENOL SILYL ETHERS OF CYCLIC KETONES WITH CHIRAL SULFINATES
Authors: Hiroi Kunio , Matsuyama Nobuhiko 
Published: July 2006

Abstract
The acid-catalyzed reactions of enol silyl ethers of cyclic ketones with chiral sulfinic esters provided a new and general entry to optically active α-sulfinyl ketones. Reaction of the enol silyl ether of cyclohexanone with methyl (S)-p-toluenesulfinate in the presence of boron trifluoride etherate (2.0 equiv.) produced (Rs)-2-p-toluenesulfinylcyclohexanone with inversion of configuration in 98.3% stereospecificity at the sulfur atom. This method was applicable smoothly to enol silyl ethers of other cyclic ketones with high stereospecificity.
“SODIUM PERCARBONATE” (SPC) AS A HYDROGEN PEROXIDE SOURCE FOR ORGANIC SYNTHESIS
Authors: Ando Takashi , Cork David G , Kimura Takahide 
Published: July 2006

Abstract
“Sodium percarbonate” (SPC) is an inexpensive, stable, safe and commercially available material which may be used as a hydrogen peroxide source for organic synthesis. Epoxidation, amine and sulfide oxidation reactions were simply performed with the solid reagent in moderate to excellent yield.
A NEW DRY-TYPE ADSORBENT OF CHELATE RESIN-IRON(II) COMPLEXES. PREPARATION AND ADSORPTION OF NITROGEN OXIDE
Authors: Toshima Naoki , Asanuma Hiroyuki , Hirai Hidefumi 
Published: July 2006

Abstract
A new dry-type adsorbent was prepared by washing the chelate resin beads holding iron(II) with a hydrophilic organic solvent, followed by vacuum drying. It adsorbed more than 99% of nitrogen oxide from 6 dm3 of nitrogen gas containing 980 ppm nitrogen oxide in 25 min. The nitrogen oxide adsorbed on the adsorbent was able to be desorbed by raising temperature up to 100 °C under vacuum.
PREPARATION OF SiO2 POWDER CONTAINING FINE γ-Fe2O3 PARTICLES
Authors: Akiyama Tadashi , Tanigawa Eiji , Ida Takashi , Tsuiki Hideyasu , Ueno Akifumi 
Published: July 2006

Abstract
Fine γ-Fe2O3 particles dispersed in SiO2 powder was prepared by simultaneous hydrolysis of mixed alkoxides solution composed of ethyl silicate and Fe-ethylene glycolate and the magnetic properties of this powder were discussed with an aid of TEM measurement.
CARBON-SKELETON REARRANGEMENT OF ALKYL LIGANDS COORDINATED TO HYDROPHOBIC VITAMIN B12 DERIVATIVES IN MOLECULAR AGGREGATES
Authors: Murakami Yukito , Hisaeda Yoshio , Ohno Teruhisa , Matsuda Yoshihisa 
Published: July 2006

Abstract
The carbon-skeleton rearrangement of alkyl ligands coordinated to hydrophobic vitamin B12 derivatives took place in molecular a aggregates formed with CTAB, Triton X-100, or N,N-didodecyl-Nα-[6-(trimethylammonio)hexanoyl]-l-alaninamide bromide more favorably than the reaction in methanol or benzene under anaerobic conditions in the dark.
A NOVEL AND BIOMIMETIC SYNTHESIS OF (±)-CHELAMINE, (±)-CHELIDONINE, SANGUINARINE, AND DIHYDROSANGUINARINE FROM COPTISINE VIA A COMMON INTERMEDIATE
Authors: Hanaoka Miyoji , Yoshida Shuji , Annen Masami , Mukai Chisato 
Published: July 2006

Abstract
(±)-Chelamine and (±)-chelidonine, B/C cis hexahydrobenzo[c]phenanthridxne alkaloids were stereoselectively synthesized from coptisine via the key intermediate, which was also converted to fully aromatized benzo[c]phenanthridine alkaloids, sanguinarine and dihydrosanguinarine.
A NOVEL METHOD FOR CYCLOPENTANNELATION USING REGIOSELECTIVE ACYLATION OF ALLYLIC SULFIDES VIA α-SILYL INTERMEDIATES
Authors: Hiroi Kunio , Sato Hiroyasu , Kotsuji Kumiko 
Published: July 2006

Abstract
An aluminum chloride-catalyzed reaction of 1-(phenylthiotrimethylsilylmethyl)cyclohexene, readily obtainable from cyclohexanone, with acid chlorides in dichloromethane underwent a regioselective acylation at the γ-Position of the allylic system to give γ-acyl enol thioethers in good yields. Heating of these enol thioethers with an equimolar amount of p-toluenesulfonic acid produced 2-cyclopentenone derivatives. This novel method for cyclopentannelation provides a new entry to 2-cyclopentenone ring systems.
EXTERNAL MAGNETIC FIELD EFFECTS ON THE EMISSION INTENSITIES OF THE OH(A-X) AND CH(A-X) BANDS IN LOW PRESSURE C2H2/O2 AND C3H8/O2 FLAMES
Authors: Fukuda Yoshio , Abe Haruo , Hayashi Hisaharu , Imamura Takashi , Nagakura Saburo 
Published: July 2006

Abstract
Magnetic field effects on emission intensities of the CH(A-X) and OH(A-X) emission were studied with low pressure C2H2/O2 and C3H8/O2 flames produced by a microwave discharge of O2. When a magnetic field of 1.8 T was applied, the intensity of the CH(A-X) emission was reduced to 95% of that at zero field.
OXIDATION POTENTIALS OF NICKEL THIOLATES, AND Ni(III) SITES OF HYDROGENASES IN H2 UPTAKE BACTERIA
Authors: Yamamura Takeshi 
Published: July 2006

Abstract
Oxidation potentials of 15 nickel thiolates were surveyed in aprotic media with differential pulse polarography and cyclic voltammetry in terms of the nickel(III) site of hydrogenases of hydrogen uptake bacteria. The potential distribution of the thiolates in relation to the RS−/Ni ratio suggests that the number of the cysteinyl residues coordinating to the Ni(III) in the enzymes is 4 if there are no other kind of anionic residues around the metal.
DECOMPOSITION OF VITAMIN A BY NO2
Authors: Ohta Tomohiro , Suzuki Takahito , Kanoh Takako 
Published: July 2006

Abstract
Reactions of gaseous NO2 with Vitamin A’s (retinol and retinal) dissolved in CCl4 were carried out in test tubes. The concentrations of Vitamin A’s were monitored by HPLC using UV-VIS absorption spectrometry for each compound. These Vitamin A’s were found to be easily decomposed by bubbling NO2 through the solution at concentrations of the order of ppm in air at the flow rate of 30 ml/min.
CUBANE-TYPE CLUSTER [Mo4S4(NH3)12]Cl4·7H2O
Authors: Shibahara Takashi , Kawano Eiji , Okano Masami , Nishi Masahiro , Kuroya Hisao 
Published: July 2006

Abstract
Ammonia-coordinated cubane-type cluster complex [Mo4S4(NH3)12]Cl4·7H2O has been prepared from [Mo4S4(H2O)12]5+ and ammonia and the remarkably long MO–NH3 distance of 2.34 Å (av.) disclosed by X-ray structure analysis.