bluuebunny/crossref_metadata_2025 huggingface dataset:
SYNTHESIS AND SPECTROSCOPIC PROPERTIES OF POLY(l-1-PYRENYLALANINE)
Authors: Egusa Syun , Sisido Masahiko , Imanishi Yukio
Published: July 2006

A novel aromatic poly(amino acid), poly(l-1-pyrenylalanine), was synthesized as a block copolymer with poly(γ-benzyl Dl-glutamate). The circular dichroism of the block copolymer in trimethyl phosphate indicated a helical arrangement of the pyrenyl groups along the polypeptide chain. The excimer emission was weaker than that from the corresponding racemic copolymer. Two different species of excimers were found by the circularly polarized fluorescence spectrum.
INTERMEDIACY OF CYCLOHEXADIENYL RADICALS WITH AN AROYLOXY GROUP ON THE METHYL-SUBSTITUTED IPSO CARBON ATOM IN PHOTOLYSES OF BIS(2-THIOPHENECARBONYL) AND DIBENZOYL PEROXIDES IN 1,3,5-TRIMETHYLBENZENE
Authors: Takahara Shigeru , Kitamura Akihide , Sakuragi Hirochika , Tokumaru Katsumi
Published: July 2006

Investigation of the products arising from photolyses of bis(2-thiophenecarbonyl) and dibenzoyl peroxides in 1,3,5-trimethylbenzene provided clear evidence for participation of cyclohexadienyl radicals with the aroyloxy group on the methyl-substituted ipso carbon atom in formation of 2′,3′,4,5′,6-pentamethyldiphenylmethane through recombination with 3,5-dimethylphenylmethyl radicals.
STRUCTURE OF Zn(II) COMPLEX WITH CYCLO(l-METHIONYL-l-HISTIDYL)
Authors: Kojima Yoshitane , Ishio Noriaki , Yamashita Tetsushi , Hirotsu Ken
Published: July 2006

X-Ray structure analysis of a Zn(II) complex with cyclo(l-methionyl-l-histidyl) as a metalloprotein model shows tetrahedral coordination of Zn by each 1-N atom of four imidazole groups of histidine residues.
SYNTHESIS OF AMPHIPHILIC PORPHINATO IRON COMPLEXES HAVING PHOSPHORYLCHOLINE GROUPS
Authors: Matsushita Yoh-ichi , Hasegawa Etsuo , Eshima Kiyoshi , Tsuchida Eishun
Published: July 2006

New porphyrin derivatives having alkyl phosphorylcholine groups as amphiphilic moieties and their iron complexes were prepared. Based on the hydrophobic–hydrophilic balance, some of the synthesized complexes were efficiently embedded in the bilayer of phospholipid liposomes.
REFLECTION SPECTRA AND ELECTRICAL CONDUCTIVITY OF (DBTTF)8–(SnCl6)3
Authors: Tanaka Masashi , Ando Yukimi , Tanaka Jiro
Published: July 2006

Optical reflection and dc conductivity measurements of (DBTTF)8–(SnCl6)3 single crystals were carried out. The temperature dependence of the conductivity behaves as (A/T3) exp(−Eg/2kT) in the temperature range above 85 K. The obtained activation energy Δ = 1010 K is fairly comparable with the result estimated by the optical study.
CATION-EXCHANGE PROPERTIES OF COPRECIPITATED SILICA-TITANIA GEL
Authors: Kaneko Shoji , Tsukamoto Kazuyoshi
Published: July 2006

Silica-titania gel was found to be a polybasic acid and to exhibit ion-exchange abilities for alkali metal ions. In the chloride solutions, the ion-exchange reaction was relevant to ammonium and sodium ions on the gels, and in the hydroxide solutions, it also relevant to proton in addition to these two ions.
MICROENVIRONMENT OF PHOSPHINE GROUP ON A PHOSPHINATED SILICA SURFACE AS PROBED BY SOLID-STATE HIGH-RESOLUTION 31P NMR SPECTROSCOPY
Authors: Shinoda Sumio , Nakamura Kenichi , Saito Yasukazu
Published: July 2006

Two types of microenvironments were discriminated for the Ph2P(CH2)8Si≡ group fixed on a silica gel by use of solid-state high-resolution 31P NMR spectroscopy. While one is also detectable with conventional (solution) NMR in a suspended state, another shows more solid-like mobility.
FORMATION AND REACTION OF CARBONYL YLIDES. 1,3-DIPOLAR CYCLOADDITION OF 1-METHOXY-2-BENZOPYRYLIUM-4-OLATE TO CARBONYL COMPOUNDS
Authors: Ibata Toshikazu , Toyoda Jiro
Published: July 2006

Copper(II) acetylacetonate-catalyzed decomposition of o-methoxy-carbonyl-α-diazoacetophenone in benzene in the presence of carbonyl compounds gave 1,3-dipolar cycloadducts of l-methoxy-2-benzopyrylium-4-olate with carbonyl compounds in high yields.
DIRECT SYNTHESIS OF 1,4-BUTANEDIOL FROM ALLYL ALCOHOL USING CARBON MONOXIDE AND WATER IN THE PRESENCE OF Rh6(CO)16-PROPANEDIAMINE SYSTEM
Authors: Kaneda Kiyotomi , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

Rh6(CO)16-propanediamine system catalyzes a direct route to 1,4-butanediol from allyl alcohol under the water gas shift reaction condition. Using an aminopyridine in place of the diamine gives γ-butyrolactone in a good yield.
A NEW GENERATION OF α-OXA-ACYLIMINIUM IONS AND AN APPLICATION TO A SYNTHESIS OF OXAZOLO[4,3,a]ISOQUINOLINE AND RELATED COMPOUNDS
Authors: Kano Shinzo , Yuasa Yoko , Yokomatsu Tsutomu , Shibuya Shiroshi
Published: July 2006

The carbomates, obtained by the reaction of the azide with ethyl glycolate and ethyl lactate, were reduced with i-Bu2AlH and the reduction products were treated with formic acid to give the corresponding oxazolo[4,3,-a]isoquinolines. By this method, the thieno[3,2-c]pyridine analogues were also pepared.
STEREOSELECTIVITY OF DIENE-TRANSMISSIVE DIELS-ALDER REACTION; CYCLOADDITION REACTION OF CROSS-CONJUGATED TRIENE SYSTEM TO OLEFINIC DIENOPHILES
Authors: Tsuge Otohiko , Wada Eiji , Kanemasa Shuji
Published: July 2006

The stereoselectivity of diene-transmissive Diels–Alder reaction of a cross-conjugated triene, 3-benzylidene-2,4-bis(trimethylsilyloxy)-1,4-pentadiene, with a variety of olefinic dienophiles was investigated. Cyclic dienophiles gave the stereoselective bis-adducts via the endo mono-cycloadducts, whereas the exo mono-adducts were obtained as major products in the reaction with acyclic dienophiles. The steric regulation of diene-transmissive Diels–Alder reaction was discussed.
ON THE SIMILARITY OF THE HIGH-RESOLUTION SOLID-STATE 29Si AND 27Al SPECTRA OF SILICALITE AND DEALUMINATED ZEOLITE ZSM-5
Authors: Thomas John M , Klinowski Jacek , Anderson Michael W
Published: July 2006

On dealuminating a sample of zeolite ZSM-5 (Si/Al ratio of 33.3 initially, 119 finally) at 540 °C using silicon tetrachloride vapour, the 29Si magic-angle-spinning NMR spectrum develops fine structure akin to that seen in the spectrum of silicalite, while-the 27Al spectrum confirms that Al has been removed from tetrahedral sites. This lends further support to the view that the framework structures of ZSM-5 and silicalite are closely similar.
SYNTHESIS OF QUADRIVALENT METAL ANTIMONATES AS ION EXCHANGERS AND THEIR SELECTIVITIES FOR ALKALI METAL IONS
Authors: Abe Mitsuo , Tsuji Masamichi
Published: July 2006

Various antimonates of quadrivalent metals were synthesized by hydrolysis of a mixed solution with antimony(V) chloride solution and a solution of quadrivalent metal salt. The equilibrium distribution coefficients for alkali metal ions on the samples prepared were determined for their selectivities.
MULTICENTER ORGANIC REDOX SYSTEM. NOVEL REDUCTION OF BISNICOTINAMIDES AS ENHANCED BY INTRAMOLECULAR FACE-TO-FACE GEOMETRY
Authors: Murakami Yukito , Kikuchi Jun-ichi , Nishida Koji
Published: July 2006

The cyclic “face-to-face” bisnicotinamide, cBisNA+(C4,o-Xyl), and its noncyclic counterpart, BisNA+(Et,o-Xyl), were readily reduced with the hydroxide ion to afford intramolecular 6,6′-coupling products. The effect of rigid intramolecular geometry on the reactivity was discussed in reference to the similar geometrical effect given by bisdihydronicotinamides on the reduction of a carbonyl substrate.
A FACILE CLEAVAGE OF BENZYLIDENE ACETALS WITH DIISOBUTYLALUMINUM HYDRIDE
Authors: Takano Seiichi , Akiyama Masashi , Sato Seiji , Ogasawara Kunio
Published: July 2006

Benzylidene acetals of 1,2- and 1,3-glycols are easily cleft by diisobutylaluminum hydride in a toluene solution at 0 °C–room temperature to give the corresponding monobenzyl ethers of the glycols. In general the reaction proceeds excellently in regioselective manner depending on the stereochemical environment.
FACILE GENERATION OF ALKYL RADICALS BY THE PALLADIUM ON CARBON CATALYZED THERMOLYSIS OF ALKYLMERCURIALS
Authors: Iwamura Michiko , Futibe Shohaku , Matukura Tetuo , Sano Masahide
Published: July 2006

Dibenzylmercury was completely decomposed within 20 min in refluxing xylene in the presence of a catalytic amount of 5% palladium on carbon, giving mercury and dibenzyl. The generation of benzyl radicals was confirmed by the formation of 1,3-adduct to α-phenyl-N-benzylnitrone and 9,10-adduct to anthracene. Other alkylmercurials showed a similar but less satisfactory result.
(TETRABENZPORPHINATO)IRON
Authors: Kobayashi Nagao , Koshiyama Masami , Osa Tetsuo
Published: July 2006

The iron complex of tetrabenzporphine was prepared and characterized. Cyclic voltammetry, and UV absorption, EPR, and MCD spectroscopy have revealed that its monochloride and bisimidazole complexes are trivalent iron high- and low-spin complexes, respectively.
MARKED EFFECTS OF RING SIZE ON THE CORRELATED ROTATION OF THE CYCLOALKYL GROUPS OF 1,1-DICYCLOALKYLMETHYLENECYCLOALKANES
Authors: Takeuchi Ken’ichi , Toyama Tetsuo , Kubota Yasuhiro , Okamoto Kunio
Published: July 2006

Correlated rotation of the cycloalkyl groups has been observed by 13C NMR for the title compounds containing six-, seven-, or eight-membered rings. The ΔH≠ value increases with the increase in the ring size, attaining 79.5 ± 2.1 kJ mol−1 when all the three rings are eight-membered. Molecular mechanics calculations indicated that the magnitude of internal angles is a major contributing factor.
SELECTIVE REMOVAL OF TERMINAL DIMETHOXYTRITYL GROUPS
Authors: Takaku Hiroshi , Morita Kazuhiro , Sumiuchi Takashi
Published: July 2006

N 6’N6,3′,5′-O-Protected deoxyadenosine derivatives were found to be key intermediate for synthesis of oligodeoxyribonucleotides. Treatment of protected deoxyadenosine derivatives with 3% trichloroacetic acid in nitromethane-methanol (95:5) gave the corresponding de-dimethoxytritylated deoxyadenosine derivatives without causing any damage to the glycosidic bond.
BIS(1-TRIFLUOROMETHYL-2,2,2-TRIFLUOROETHOXY)TRIPHENYLPHOSPHORANE. A NEW ROUTE TO TRIFLUOROMETHYLATED HETEROCYCLES
Authors: Kubota Toshio , Yamamoto Kazuhiro , Tanaka Tatsuo
Published: July 2006

Bis(1-trifluoromethyl-2,2,2-trifluoroethoxy)triphenylphosphorane(1) readily reacted with anilines to form N-hexafluoroisopropylated products(2). By the dehydrofluorination of 2, 2-arylamino-1,1,3,3,3-pentafluoropropenes(3) were obtained. Furthermore, when anilines with o-functional group were used as nucleophile, benzo-1,4-dihetero-six membered rings that have CF3 group at N-α-position were obtained.
PREPARATION OF DIPHENYLPHOSPHINE OXIDES BY DEOXYGENATION OF AN α-HYDROXYL GROUP WITH DIPHOSPHORUS TETRAIODIDE
Authors: Yamashita Mitsuji , Tsunekawa Kenji , Sugiura Motoyuki , Oshikawa Tatsuo , Inokawa Saburo
Published: July 2006

Deoxygenation of (1-hydroxyethyl)diphenylphosphine oxide derivatives was first achieved by a reaction with diphosphorus tetraiodide to give ethyldiphenylphosphine oxide derivatives. The reaction was also successful to prepare cyclohexyldiphenylphosphine oxide.
PHOTOINDUCED CHARGE SEPARATION, ELECTRON STORAGE AND ELECTRON TRANSPORT TO PLATINUM COLLOID BY THE USE OF VIOLOGEN POLYMER
Authors: Ohsako Tatsuya , Sakamoto Tetsuo , Matsuo Taku
Published: July 2006

Viologen polymers were successfully used to collect photoliberated electron from polypyridineruthenium(II) complexes by the use of a zwitterionic viologen as an electron mediator. The collected electrons were successively trapped by platinum colloid supported on the viologen polymers. The viologen polymer thus proved to be an efficient electron transporting system from photoredox reaction center to multi-electron redox catalyst for chemical solar energy conversion.
SYNTHESIS OF 11-DEOXYANTHRACYCLINONE PRECURSOR. A NEW STRATEGY TOWARD TETRACYCLIC SYSTEM VIA TANDEM 1,4/[4+2] ADDITION
Authors: Naruta Yoshinori , Kashiwagi Masanori , Nishigaichi Yutaka , Uno Hidemitsu , Maruyama Kazuhiro
Published: July 2006

Direct and regioselective reaction of 2,4-pentadienyltrimethylstannane with 3-acryloyl-5-methoxy-1,4-naphthoqinone afforded a tetracyclic compound, a key precursor for synthesizing 11-deoxyanthracycline antibiotics, by single step.
POLYMER-ANCHORED VANADIUM(V) AND MOLYBDENUM(VI) CATALYSTS FOR THE REGIOSELECTIVE EPOXIDATION OF (E)-GERANIOL WITH t-BUTYL HYDROPEROXIDE
Authors: Yokoyama Toshiro , Nishizawa Masato , Kimura Tetsuo , Suzuki Toshishige M
Published: July 2006

The reaction of (E)-geraniol with t-BuOOH in the presence of polymer-anchored VV or MoVI complexes gave 2,3-epoxygeraniol in high yields. The conversion and the selectivity by the MR-type polymer catalysts containing VV were comparable to those given by homogeneous catalyst based on VO(acac)2. The present catalysts can be used repeatedly without causing significant decrease in catalytic activity.
10-OXO-, 10-HYDROXY-, AND 10-METHOXYCEMBRENES FROM THE SOFT CORAL SARCOPHYTA ELEGANS
Authors: Uchio Yasuto , Nitta Masayoshi , Nozaki Hiroshi , Nakayama Mitsuru , Iwagawa Tetsuo , Hase Tsunao
Published: July 2006

The structures and absolute configurations of three cembranoids, 10-oxo-, 10-hydroxy-, and 10-methoxycembrenes, isolated from the soft coral Sarcophyta elegans, are reported.
SYNTHESIS AND CRYSTAL DATA OF NEW Ln3S4 (Ln=La,Ce,Sm) AND LnS2 (Ln=Nd) TYPE SULFIDES CONTAINING A SMALL AMOUNT OF ANTIMONY1)
Authors: Gao Jin-zhang , Nakai Izumi , Miyawaki Ritsuro , Nagashima Kozo
Published: July 2006

Single crystals of four new lanthanoid sulfides were prepared by the evacuated silica-tube method: Ln3−xSbxS4 with 0.02≤x≤0.1, where Ln=La, Ce, and Sm; Ln1−xSbxS2 with x≅0.02, where Ln=Nd. They are all reddish black crystals with plate-like habits. The crystals belong to the orthorhombic system with space group P21221.
ACETYLENE COORDINATION TO THE POLYMER-BOUND METHYLCYCLOPENTADIENYL MANGANESE COMPLEX
Authors: Kurimura Yoshimi , Ohta Fumihiko , Ohtsuka Nobuyuki , Tsuchida Eishun
Published: July 2006

Stable polymer-bound η2-acetylene complex has been prepared by direct reaction of (η5-methylvinylcyclopentadienyl)tricarbonylmanganese (MeVCpMn(CO)3)-co-styrene membrane with acetylene on UV irradiation under mild conditions. Reaction of MeVCpMn(CO)3-co-N-vinylpyrrolidone under acetylene has also been investigated.
VAPOR PHASE HYDROCARBONYLATION OF METHANOL WITH COBALT–PALLADIUM ON ACTIVE CARBON CATALYSTS
Authors: Fujimoto Kaoru , Setoyama To-oru , Tominaga Hiro-o
Published: July 2006

Acetaldehyde was formed from methanol by vapor phase reaction with synthesis gas over supported cobalt–palladium catalysts in the presence of methyl iodide, at temperatures between 180 and 240°C and at pressures between 10 and 65 atm. Active carbon carrier was found essential for bringing about the catalytic activity of cobalt. Addition of soft alkali metal salts and palladium accelerated the rate of acetaldehyde formation.
A NEW APPROACH TO (±)-LEUKOTRIENE A4 METHYL ESTER
Authors: Tsuboi Sadao , Masuda Toshihide , Takeda Akira
Published: July 2006

A stereoselective synthesis of (2E,4Z,7Z)-2,4,7-tridecatrienol, a key intermediate in the synthesis of leukotriene A4 methyl ester, is established via alumina-promoted rearrangement of ethyl (7Z)-3,4,7-tridecatrienoate to ethyl (2E,4Z,7Z)-2,4,7-tridecatrienoate as a key step.
BIS(p-METHOXYPHENYL)SELENOXIDE AS A COOXIDANT FOR SELENIUM DIOXIDE OXIDATION OF BENZYL ALCOHOLS
Authors: Ogura Fumio , Otsubo Tetsuo , Ariyoshi Kimio , Yamaguchi Hachiro
Published: July 2006

The title selenoxide provides a new oxidizing system in combination with catalytic selenium dioxide for oxidation of benzyl alcohols to benzaldehydes. An effective redox cycle between selenium and the dioxide is suggested.
THE EFFECT OF DBU(1,8-DIAZABICYCLO[5.4.0]NDECENE-7) ON THE WATER GAS SHIFT REACTION CATALYZED BY M3(CO)12(M = Ru, Os)
Authors: Wada Fumio , Shimuta Masanori , Goto Toshihiro , Ikeda Toshihiko , Kikukawa Kiyoshi , Matsuda Tsutomu
Published: July 2006

DBU was found to be an effective cocatalyst for the water gas shift reaction(WGSR) catalyzed by M3(CO)12(M= Ru, Os), especially by Os3(CO)12 under basic conditions. The dianion cluster, H2M4(CO)122− was isolated in the DBU-M3(CO)12 catalyst system as bis(triphenylphosphine)iminium salts and was considered to be one of the active species in the reaction.
DIFFERENCE IN THE CATALYTIC ACTIVITIES FOR THE CONVERSION OF METHANOL BETWEEN TRIVALENT AND TETRAVALENT Ti ION EXCHANGED FORMS OF LAYERED SILICATE
Authors: Morikawa Yutaka , Wang Fey-long , Moro-Oka Yoshihiko , Ikawa Tsuneo
Published: July 2006

The catalytic activities of Ti ion exchanged forms of layered silicate minerals are completely different by the ionic valencies. Methanol was dehydrated to dimethyl ether and hydrocarbons over Ti(IV) forms of the minerals, whereas dehydrogenated to methyl formate and methylal over Ti(III) forms of the minerals. It is of particular interest that acetone is formed from methanol over Ti(III) form of fluoro tetrasilicic mica (Ti (III)-TSM).
MOLECULAR STRUCTURE OF A BINUCLEAR COBALT DIOXYGEN COMPLEX, [Co2(2,6-BIS[BIS(2-PYRIDYLMETHYL)AMINOMETHYL]-4-METHYLPHENOLATO)(BENZOATO)DIOXYGEN] (BF4)2·2H2O
Authors: Suzuki Masatatsu , Ueda Ikuhiko , Kanatomi Hajime , Murase Ichiro
Published: July 2006

The molecular structure of the title compound has been determined by the X-ray diffractometry. Two cobalt ions are linked by dioxygen, benzoate and phenolate bridges. Reversible O2 binding was observed in the solid state. The O2 bond distance is 1.43 (3) Å which is in the range of those of the μ-peroxo cobalt complexes.
PREPARATION AND CRYSTAL STRUCTURE OF (+)560CD-cis·cis·cis-((2d,9l)-DIAMINO-3,3,8,8-TETRAMETHYL-4,7-DITHIA-1,10-DECANDIOATO)COBALT(III) ION
Authors: Okamoto Ken-ichi , Kanesaka Mikako , Nomoto Masayo , Hidaka Jinsai
Published: July 2006

The crystal structure and absolute configuration of the title complex ion, [Co(Dl-ebp)]+, were determined by an X-ray diffraction study of its (+)546-(ethylenediaminetetraacetato)cobaltate(III) salt pentahydrate. The Dl-ebp acts as sexidentate ligand. The (+)560CD-cis·cis·cis isomer takes s configuration and the chiral sulfur donor atoms take selectively R(S) ,R(S) configuration.
DETERMINATION OF 15 RARE EARTH ELEMENTS BY LIQUID CHROMATOGRAPHY WITH INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION SPECTROMETRIC DETECTION
Authors: Yoshida Kazuo , Fuwa Keiichiro , Haraguchi Hiroki
Published: July 2006

An inductively coupled plasma atomic emission spectrometer (ICP-AES) interfaced with high performance liquid chromatography (HPLC) has been applied to the determination of 15 rare earth elements (14 lanthanide elements and Y). The separation of rare earth elements was performed by HPLC with a cation exchange column using ammonium lactate buffer. The ICP-AES was used as a high-sensitive and an element-selective detector for rare earth elements.
A SYNTHETIC APPROACH TO ANNULENOANNULENOANNULENE, AN ANTHRACENE-LIKE SYSTEM
Authors: Iyoda Masahiko , Ogura Fumio , Akiyama Shuzo , Nakagawa Masazumi
Published: July 2006

An improved synthesis of tetra-t-butylhexakisdehydro[18]annuleno[26]annulenedione, a key compound for the synthesis of the tricyclic annulenoannulenoannulene, was carried out. Two dideuterio derivatives of the [18]annuleno[26]annulenedione has been synthesized. An attempted synthesis of tetra-t-butyloctakisdehydro[18]annuleno[18]annuleno[18]annulene is described.
THE SYNTHESIS OF DIBENZO DERIVATIVES OF PENTATRIDECA-, PENTAPENTADECA-, PENTAHEPTADECA-, AND PENTANONADECAFULVALENES
Authors: Morita Noboru , Asao Toyonobu , Ojima Juro , Hamai Satoru
Published: July 2006

The title fulvalenes were synthesized by the reaction of the corresponding large membered annulenones with diphenyleneketene and the 1H-NMR spectra were discussed in connection with their tropicity.
MORPHOLOGICAL CHANGE INDUCED BY INTERMEMBRANE INTERACTION OF SYNTHETIC PEPTIDE LIPIDS BEARING CATIONIC AND NONIONIC HEAD GROUPS
Authors: Murakami Yukito , Nakano Akio , Kikuchi Jun-ichi , Takaki Toshihiko , Uchimura Katsuya
Published: July 2006

The intermembrane lipid transfer between two different aggregates individually composed of N,N-ditetradecyl-Nα-(6-quinoylaminohexanoyl)-l-alaninamide and N,N-dihexadecyl-Nα-[(6-trimethylammonio)hexanoyl]-l-alaninamide bromide induced the morphological change of individual aggregates and ultimately resulted in the formation of small vesicles as confirmed by electron microscopy and differential scanning calorimetry.
ELIMINATION OF SAMPLE CHARGING IN UV PHOTOEMISSION FROM SINGLE CRYSTALS OF SEVERAL POLYCYCLIC HYDROCARBONS
Authors: Schmid Bernhard M , Sato Naoki , Inokuchi Hiroo
Published: July 2006

UV photoemission spectra of single crystals of polycyclic hydrocarbons were measured using two methods, 1) covering a sample with a thin layer of gold and 2) inducing photoconduction in the sample with low-energy light, to eliminate sample charging. Their ionization thresholds obtained are all smaller than the values for corresponding polycrystalline thin films.
SYNTHESIS OF 1-METHOXY-2-OXOALKYL PHENYL SULFIDES AND THEIR SYNTHETIC APPLICATION TO 3-SUBSTITUTED FURANS
Authors: Mandai Tadakatsu , Takeshita Masahiro , Mori Kazuhito , Kawada Mikio , Otera Junzo
Published: July 2006

1-Methoxy-2-oxoalkyl phenyl sulfides were newly synthesized from methoxy(phenylthio)methane and various N,N-dimethylalkanamides. Synthetic application of the compounds thus obtained to several 3-substituted furans also is reported.
REDISPERSION OF COBALT METAL PARTICLES IN Co/TiO2 CATALYST AND ITS EFFECTS ON PROPENE HYDROGENATION
Authors: Takasaki Seiji , Takahashi Kaoru , Suzuki Hideo , Sato Yuzuru , Ueno Akifumi , Kotera Yoshihide
Published: July 2006

The rate of propene hydrogenation on Co/TiO2 catalyst, prepared by an alkoxide technique,was significantly enhanced when the catalyst was reduced by hydrogen at 700°C. However, over the catalyst prepared by an usual impregnation method, the enhancement of the rate was not observed at any reduction temperatures. The effects of reduction temperatures on the rate of propene hydrogenation were elucidated by redispersion of metallic cobalt particles.
PREPARATION OF (Z,E,E)-HUMULENE. AN IMPORTANT INTERMEDIATE FOR BIOGENESIS OF POLYCYCLIC SESQUITERPENES
Authors: Shirahama Haruhisa , Arora Gurdial S , Matsumoto Takeshi
Published: July 2006

(Z,E,E)-Humulene was prepared from (E,E)-6,7-epoxyhumula-2,9-dien-12-ol which was obtained from (E,E,E)-humulene 6,7-epoxide by oxidation with SeO2-t-BuOOH.
LAURENCIAL, A NOVEL SESQUITERPENE α,β-UNSATURATED ALDEHYDE FROM THE RED ALGA LAURENCIA NIPPONICA YAMADA
Authors: Kurata Kazuya , Suzuki Teruaki , Suzuki Minoru , Kurosawa Etsuro , Furusaki Akio , Matsumoto Takeshi
Published: July 2006

Laurencial, a novel sesquiterpene which possesses spiro[4.5]decane skeleton with α,β-unsaturated aldehyde moiety, has been isolated from the title alga and its structure was determined by X-ray crystallographic analysis.
LITHIUM 1,8-DIAZABICYCLO[5.4.0]UNDEC-7-EN-6-IDE AS A NOVEL CARBON DIOXIDE CARRIER
Authors: Matsumura Noboru , Ohba Takayuki , Yoneda Shigeo
Published: July 2006

Lithium 1,8-diazabicyclo[5.4.0]undec-7-en-6-ide (1) has underwent the insertion of carbon dioxide and the resulting lithium 6-carboxylato complex (2) transfered the carboxylato moiety to active methylene compounds (3) such as p-nitroacetophenone, acetophenone, p-methoxyacetophenone, and s-benzylthioacetate under mild conditions.
NOVEL REDUCTION OF CHLORINE ADDUCTS OF ARYL AND ALKYL SELENIDES WITH DIMETHYL SULFOXIDE
Authors: Nakanishi Waro , Sakaue Akira , Ikeda Yoshitsugu , Iwamura Hiizu
Published: July 2006

The adducts of chlorine with diaryl selenides such as selenanthrene, diphenyl selenide, and selenoxanthone have been found to be reduced to the corresponding selenides in dimethyl sulfoxide forming chloromethyl methyl sulfoxide and hydrogen chloride. Similarly, dimethyl selenide dichloride was reduced to dimethyl selenide in the presence of a base.
MAGNETIC FIELD EFFECT ON THE PHOTOINDUCED ELECTRON TRANSFER REACTION BETWEEN DUROQUINONE AND AROMATIC AMINES IN SDS MICELLAR SOLUTION
Authors: Tanimoto Yoshifumi , Shimizu Katsuko , Udagawa Hiroko , Itoh Michiya
Published: July 2006

The magnetic field effect(<80 mT) on the photoinduced electron transfer reaction between duroquinone and aromatic amines in SDS micellar solutions was studied by a nanosecond laser flash photolysis technique. The relative yield of diphenylamine cation free radical increases about 5 % at 79 mT, while that of triphenylamine cation free radical is almost magnetic field independent.
ACTIVE CARBON-SUPPORTED COPPER(I) CHLORIDE AS CARBON MONOXIDE SOLID ADSORBENT
Authors: Hirai Hidefumi , Wada Keiichiro , Komiyama Makoto
Published: July 2006

An active carbon-supported copper(I) chloride is prepared as a solid adsorbent for carbon monoxide. It adsorbs carbon monoxide at 20°C under 1 atm and releases almost all of the adsorbed carbon monoxide by elevating the temperature to 120°C under 1 atm, or by reducing the pressure to 0.4 mmHg at 20°C.
A HIGH RESOLUTION 13C NMR STUDY OF SILK FIBROIN IN SOLID STATE BY THE CROSS POLARIZATION-MAGIC ANGLE SPINNING METHOD: CONFORMATIONAL CHARACTERIZATION UTILIZING CONFORMATION-DEPENDENT 13C CHEMICAL SHIFTS
Authors: Saitô Hazime , Iwanaga Yoshihiro , Tabeta Ryoko , Narita Mitsuaki , Asakura Tetsuo
Published: July 2006

Solid state high resolution 13C NMR spectra of the silk fibroins from Bombyx mori (B. mori) and Philosamia cynthia ricini (P. c. ricini) together with those of appropriate model peptides were recorded by cross polarization-magic angle spinning method. We found by examining 13C chemical shifts that anti-parallel β-sheet and α-helix forms were straightforwardly ascribed to the fibroins from B. mori and P. c. ricini, respectively.
CU2+-INDUCED BILAYER FORMATION OF SINGLE-CHAIN TELOMER SURFACTANTS IN DILUTE AQUEOUS SOLUTION
Authors: Yamada Kimiho , Shosenji Hideto , Ihara Hirotaka , Hotta Osamu
Published: July 2006

A large enhancement (35 to 480 fold) of the aggregate weight was observed in the presence of Cu2+ for single-chain telomer surfactants containing the hydroxamic acid group in water. Electron microscopy indicated a drastic morphological change from micelles to multi-lamellar vesicles was induced by Cu2+.
SELECTIVE FORMATION OF 1-BUTENE IN ELIMINATION OF AMMONIA FROM 2-BUTANAMINE CATALYZED BY ZIRCONIUM OXIDE
Authors: Satoh Akira , Hattori Hideshi , Tanabe Kozo
Published: July 2006

Zirconium oxide catalyzed elimination of ammonia from 2-butanamine to yield 1-butene as the major product. The selective formation of 1-butene was also observed for ZnO, La2O3, ThO2, and MgO, though considerable formation of C2 and C5 hydrocarbons occurred.
SELECTIVE [π6s + π2s] CYCLOADDITION OF A COORDINATED CYCLIC TRIENE WITH ALKYNES. FORMATION OF BICYCLO[4.2.2]DECATRIENE SKELETON ON A Ru(0) TEMPLATE
Authors: Itoh Kenji , Mukai Katsunori , Nagashima Hideo , Nishiyama Hisao
Published: July 2006

The 1,3,5-cyclooctatriene ligand of Ru(1-6-η-cyclooctatriene)(1-2:5-6-η-cyclooctadiene) reacted with ethyne to yield Ru(η4, η2-bicyclo[4.2.2]deca-2,4,7-triene)(1-2:5-6-η-cyclooctadiene) by way of formal [η6s + η2s] cycloaddition with high selectivity. Propyne or 1-butyne gave analogous bicylodecatriene complexes.
CRYSTAL STRUCTURE OF BIS(r-1,c-3,c-5-CYCLOHEXANETRIAMINE)COBALT(III) IODIDE
Authors: Ishii Minoru , Umehara Michiko , Nomura Teruo , Nakahara Masayoshi
Published: July 2006

The molecular structure of the title compound was determined by X-ray diffraction. Six six-membered chelate rings formed by the r-1,c-3,c-5-cyclohexanetriamine were found to take chair-conformations. The complex ion had an approximate D3 symmetry. The presence of the six-membered chelate rings did not introduce much distortion on the octahedral geometry of the complex ion.
ELECTRIC FIELD-INDUCED TRANSIENT PROCESS OF POLY(p-STYRENESULFONATE) IN AQUEOUS SOLUTIONS AS STUDIED BY REVERSING-PULSE ELECTRIC BIREFRINGENCE TECHNIQUE: EFFECT OF COUNTERIONS AND OTHER ADDITIVES
Authors: Yamaoka Kiwamu , Ueda Kazuyoshi
Published: July 2006

By measuring the reverse and decay signals of poly(p-styrenesulfonate) in aqueous solutions which contain either Na+, Ca2+, or Mg2+ as the counterion, usefulness of the title technique was demonstrated. The effect of these ions and other additives like 9-aminoacridinium and glycerol on the transient relaxation times was quite appreciable.
PHOTOOXIDATION OF d-FRUCTOSE WITH IRON(III) CHLORIDE UNDER AEROBIC CONDITION
Authors: Araki Koji , Sakuma Masato , Shiraishi Shinsaku
Published: July 2006

d-Fructose is oxidatively degraded to d-erythrose with iron(III) chloride by photo-irradiation through Pyrex under aerobic as well as anaerobic condition. The reaction is suggested to proceed via formation of iron(III)-d-fructose complex and subsequent photo-redox process.
2,5-DI-t-BUTYL-7-CYANONORCARADIENE IN EQUILIBRIUM WITH THE CYCLOHEPTATRIENE FORM: THE FIRST OBSERVATION OF exo AND endo ORIENTATION OF THE 7-CYANO SUBSTITUENT IN THE NORCARADIENE FORM
Authors: Takeuchi Ken’ichi , Kitagawa Toshikazu , Senzaki Yoshihide , Fujimoto Hiroshi , Okamoto Kunio
Published: July 2006

The 1H NMR study showed that the endo-cyano isomer of the title compound is slightly more stable than the exo-cyano isomer with a population ratio of 22:17 at −120°C. In the cycloheptatriene form, the axial-cyano conformer is much less stable than the equatorial counterpart with a ratio of 1.7:59. The results can account for the marked stabilization in syn-11-cyanotricyclo[4.4.1.0]undeca-2,4-diene by the syn-cyano group.
DETERMINATION OF EXPOSED SURFACE AREA OF V2O5 ON V2O5/Al2O3 CATALYSTS BY TPD OF NH3
Authors: Suzuki Kinya , Hattori Tadashi , Miyamoto Akira , Murakami Yuichi
Published: July 2006

Exposed surface area of V2O5 on V2O5/Al2O3 catalysts was determined by temperature programmed desorption of NH3. The exposed surface was mostly composed of (010) face of V2O5 at low V2O5 content, but the exposed surface areas of other faces were comparable to that of (010) face at high V2O5 content.
REDOX-SWITCHED CROWN ETHERS. CROWN-CRYPTAND INTERCONVERSION COUPLED WITH REDOX OF THIOL GROUPS
Authors: Shinkai Seiji , Inuzuka Kenichi , Manabe Osamu
Published: July 2006

A crown ether capped with a redox-functionalized thiol-disulfide couple was synthesized. The oxidized form with an ionophoric cap binds K+, Rb+, and Cs+ more efficiently than the reduced form with two lariat-type groups. This is the first example of the redox-switched interconversion between crown and cryptand.
HIGH OXIDIZING ACTIVITY OF 8-AZA-3,10-DIMETHYL ISOALLOXAZINE (8-AZAFLAVIN)
Authors: Yano Yumihiko , Yatsu Isao , Oya Eiichi , Ohshima Masashi
Published: July 2006

8-Azaflavin was synthesized for the first time, and it was found that 8-azaflavin is much more reactive (>104) than 3,10-dimethylisoalloxazine for oxidation of thiols in aqueous solution. Catalytic efficiency for disulfides synthesis was also examined under aerobic conditions.
SONIC CHEMILUMINESCENCE OF LUMINOL FOR THE DETERMINATION OF ULTRATRACES OF COBALT(II)
Authors: Yamada Masaaki , Suzuki Shigetaka
Published: July 2006

Ultrasonically induced chemiluminescence of luminol in an aqueous alkaline solution is described for the determination of cobalt(II). This novel method is capable of detecting cobalt(II) more sensitively than any other method with a detection limit of 0.07 pg and more selectively than any other chemiluminescence method.
A RADICAL DEOXYGENATION OF PRIMARY ALCOHOLS BY USE OF TRI-n-BUTYLTIN HYDRIDE-SODIUM IODIDE, AND ITS APPLICATION TO A RADICAL CYCLIZATION
Authors: Ueno Yoshio , Tanaka Chie , Okawara Makoto
Published: July 2006

Primary alcohols are deoxygenated to hydrocarbons via tosylates with tri-n-butyltin hydride-sodium iodide under mild radical conditions; the method is useful for the preparation of cyclic compounds from acyclic ones possessing primary hydroxyl and olefinic groups by reductive cyclization.
EFFECT OF DOPING OF ClO4− ON THE PHOTOELECTROCHEMICAL PROPERTIES OF POLYACETYLENE
Authors: Nosaka Yoshio , Norimatsu Kohji , Miyama Hajime
Published: July 2006

The effect of electrochemical doping on the photoelectrochemical properties was studied for p-type semiconducting trans-polyacetylene. The magnitude of photocurrent, the response spectrum, the electrode capacitance and resistance were measured and discussed in terms of the effect of the doping.
CIDNP STUDY OF PHOTO-INDUCED RADICAL REACTION. EFFECT OF APPLIED MAGNETIC FIELD
Authors: Maruyama Kazuhiro , Hayami Jun-ichi , Otsuki Tetsuo
Published: July 2006

The strength of the applied magnetic field was found to be an important factor in detecting the CIDNP signals in the photo-induced radical reaction. The effect of the magnetic field can be understood on the basis of the radical pair theory.
AN EFFICIENT SYNTHESIS OF α-KETO AMIDES VIA REACTION OF α-(N-METHYLANILINO)-ACETONITRILE WITH ESTERS FOLLOWED BY HYDROLYSIS USING COPPER (II) ACETATE
Authors: Takahashi Kazumasa , Shibasaki Kenichiro , Ogura Katsuyuki , Iida Hirotada
Published: July 2006

An efficient sequence proposed for the conversion of esters to α-keto amides involves the reaction of α-(N-methylanilino)-acetonitrile with esters to afford β-hydroxy-α-cyanoenamines of which hydrolysis using copper (II) acetate gives the corresponding α-keto amides in good yields.
PHOTOLYSES OF BIS(2-THIOPHENECARBONYL) AND BIS(3-THIOPHENECARBONYL) PEROXIDES IN BENZENE. PRODUCTION OF BIPHENYL FROM THE SOLVENT BENZENE CONTROLLED BY THE PHOTOLYSIS RATE
Authors: Urano Toshiyuki , Kitamura Akihide , Sakuragi Hirochika , Tokumaru Katsumi
Published: July 2006

Direct and sensitized photolyses of bis(2-thiophenecarbonyl) (2-TPO) and bis(3-thiophenecarbonyl) peroxide (3-TPO) in benzene afforded biphenyl derived solely from the solvent among the products. The yield of biphenyl depended upon the rate with which the radical intermediates were generated from the peroxides in sufficiently high concentrations to dimerize.
A NOVEL METHOD FOR THE ONE-STEP SYNTHESIS OF N-ALKYL IMIDES BY THE USE OF 1,1′-DIMETHYLSTANNOCENE
Authors: Mukaiyama Teruaki , Ichikawa Junji , Toba Makoto , Asami Masatoshi
Published: July 2006

Various N-alkyl imides are easily prepared in good yields under nearly neutral conditions from equimolar amounts of cyclic acid anhydrides and primary amines by the use of 1,1′-dimethylstannocene.
FACILE PREPARATION OF PLATINUM SOLS BY SODIUM BOROHYDRIDE REDUCTION AND ITS EVALUATION IN THE PHOTOSENSITIZED REDUCTION OF WATER TO HYDROGEN
Authors: Okuno Yohmei , Chiba Yukihiro , Yonemitsu Osamu
Published: July 2006

Colloidal platinum prepared from K2PtCl4 by NaBH4, reduction in basic solution showed marked efficiency and satisfactory reproducibility in the hydrogen evolution reactions with a Ru(bpy)3Cl2/MV/EDTA model system. Examinations of electron microscopy indicated obvious relations between the activity and size of particles. Cyclodextrins as a support tend to stabilize the colloids, probably by retarding its aggregation.
CATALYTIC REDUCTION OF HYDRAZINE TO AMMONIA BY THE REDUCED SPECIES OF [Mo2Fe6S8L9]3− AND [Fe4S4L4]2− (L=SPh, SCH2CH2OH)
Authors: Hozumi Yoshiyuki , Imasaka Yoshinobu , Tanaka Koji , Tanaka Toshio
Published: July 2006

Hydrazine can be reduced to NH3 catalytically in the presence of [Mo2Fe6S8L9]3− or [Fe4S4L4]2− (L=SPh, SCH2CH2OH) in H2O or MeOH/THF by the controlled potential electrolysis. The maximum current efficiency in the electrochemical reduction of N2H4 attains 97% and the turnover number of NH3 produced per 1 h is 23 in MeOH/THF.
THE WATER GAS SHIFT REACTION CATALYZED BY RUTHENIUM CARBONYL COMPLEXES
Authors: Tanaka Koji , Morimoto Masaru , Tanaka Toshio
Published: July 2006

A new preparative method of [Ru(bpy)2 (CO)Cl]+ (bpy=2,2′-bipyridine) and the water gas shift reaction (WGSR) catalyzed by this complex are described. A cyclic mechanism for the WGSR is proposed to proceed via [Ru(bpy)2(CO)2]2+, [Ru(bpy)2(CO) (COOH)]+, and [Ru(bpy)2(CO)H]+ as intermediates successively; the former two were isolated.
3,7-DIHALO-2H,6H-BENZO[1,2-b:4,5-b′]DITHIOPHENE-2,6-DIONE. NEW WURSTER-TYPE ACCEPTORS ISOELECTRONIC WITH 2,6-ANTHRAQUINONE
Authors: Nakatsuka Masakatsu , Nakasuji Kazuhiro , Murata Ichiro , Watanabe Iwao , Saito Gunzi , Enoki Toshiaki , Inokuchi Hiroo
Published: July 2006

We describe the syntheses and properties of the new Wurster-type acceptors, 3,7-dihalo-2H,6H-benzo[1,2-b:4,5-b′]dithiophene-2,6-diones (2a) and (2b), which have C2h molecular symmetry with two sulfur atoms, together with the electrical resistivities of their CT complexes.
CONFORMATIONAL INVERSION OF 2,2′-BIPYRIDYL N,N′-DIOXIDE (bpdo) CHELATE RINGS IN THE [Cr(acetylacetonato)(bpdo)2]2+ ION
Authors: Kanno Hideaki , Shimotori Tadashi , Utsuno Shunji , Fujita Junnosuke
Published: July 2006

The [Cr(acetylacetonato)(bpdo)2](ClO4)2·H2O complex (bpdo= 2,2′-bipyridyl N,N′-dioxide) crystallizes in the lel2 (Δ(λλ), Λ(δδ)) isomer. This isomer isomerizes to the lel·ob (Δ(λδ), Λ(δλ)) isomer in aqueous solution with the rate constant of 3.31×10−3 s−1 at 295.2 K, the rate constant for racemization (Δ\ightleftarrowsΛ) being 1.08×10−4 s−1 at 295.2 K.
STRUCTURE OF MUKAADIAL, A MOLLUSCICIDE FROM THE WARBURGIA PLANTS
Authors: Kubo Isao , Matsumoto Takeshi , Kakooko Adrian B , Mubiru Nasani K
Published: July 2006

The structure of a new sesquiterpene dialdehyde, mukaadial, isolated from Warburgia stuhlmannii and W. ugandensis and possessing molluscicidal property, has been established by means of spectroscopic and chemical data.
CHEMICAL SYNTHESIS OF DEOXYSEPIAPTERIN
Authors: Baur Ralph , Sugimoto Takashi , Pfleiderer Wolfgang
Published: July 2006

A chemical synthesis of the yellow eye pigment deoxysepiapterin of Drosophila melanogaster has been achieved from 7-alkylthio pteridines by homolytic nucleophilic acylation at C-6 and subsequent hydrolyses to 6-propionylpterin derivatives followed by desulfurizations with copper–aluminum alloy.
STRUCTURE AND THERMAL RACEMIZATION OF 1,1,1-TRIS(5-AMINO-2-AZA-PENTYL)ETHANECOBALT(III) COMPLEX
Authors: Tomioka Kanji , Kashihara Takaki , Sakaguchi Ushio , Yoneda Hayami
Published: July 2006

The chiral form of the title complex ion, [Co(stn)]3+, has been found to racemize thermally both in the solid state and in solution, and the racemization rates have been measured. The structure of [Co(stn)]Cl3·3.5H2O has been determined and used to discuss the origin of this facile racemization.
COMPLEX FORMATION OF MODIFIED CYCLODEXTRINS WITH ORGANIC SALTS IN ORGANIC SOLVENTS
Authors: Komiyama Makoto , Yamamoto Hiroshi , Hirai Hidefumi
Published: July 2006

Heptakis(2,3,6-tri-O-acetyl)-β-cyclodextrin and heptakis(2,3,6-tri-O-phenylcarbamoyl)-β-cyclodextrin form complexes in chloroform and benzene with various ammonium, alkali metal, and alkaline earth metal salts of 2,4,6-trinitrophenol, 4-nitrophenol, methyl orange, and patent blue. The magnitude of complex formation largely depends on the metal cation of the salt.
A NEW METHOD FOR THE STEREOSELECTIVE SYNTHESIS OF NUCLEOSIDES FROM ACYCLIC EPOXY ALDEHYDES
Authors: Miwa Tetsuo , Narasaka Koichi , Mukaiyama Teruaki
Published: July 2006

A new method for the stereoselective synthesis of nucleosides starting from acyclic epoxy aldehydes is developed. 2′-Deoxy-α-Dl-ribonucleosides and α-l-lyxonucleosides are prepared by the reactions of the corresponding epoxy aldehydes with stannous salts of nucleoside bases utilizing stannous bromide as an activating reagent.
POLYMERIZATION OF ACETYLENE IN LIQUID CRYSTAL SOLVENT
Authors: Araya Kotaro , Mukoh Akio , Narahara Toshikazu , Shirakawa Hideki
Published: July 2006

Highly oriented polyacetylene was synthesized using nematic liquid crystals as polymerization solvent
HPLC SEPARATION OF KETO AND ENOL TAUTOMERS OF SEVERAL KETONES AT LOW TEMPERATURES
Authors: Moriyasu Masataka , Kato Atsushi , Hashimoto Yohei
Published: July 2006

High-performance liquid chromatography of some ketones at −20–−60 °C achieved the separation of keto and enol tautomers. The ratios of keto and enol forms in different conditions were determined for β-diketones. Cyclohexanone also gave a small peak which was possibly attributed to enol tautomer along with a large peak of keto tautomer.
ASSOCIATION OF THE TRIS(1,10-PHENANTHROLINE)IRON(II) CATION WITH A CATIONIC ALKYLTRIMETHYLAMMONIUM MICELLE
Authors: Tachiyashiki Satoshi , Yamatera Hideo
Published: July 2006

The rate of dissociation of [Fe(phen)3]2+ increased in cationic micellar solutions of alkyltrimethylammonium bromide, CnH2n+1N(CH3)3Br (n=8–16). The complex ion is very probably incorporated into the micelle together with the counter ion.
PYRIDAZINO[2,3-b]BENZO-1,2,4-TRIAZINE. A NEW HETEROCYCLE AND A NEW STABLE FREE RADICAL
Authors: Albini Angelo , Bettinetti Gian Franco , Minoli Giovanna , Soldi Teresa Fulle
Published: July 2006

The preparation of the new stable free radical 2,a derivative of the previously unreported pyridazino[1,2-b]benzo-1,2,4-triazine, and some of its chemical properties are described.
VANADIUM–CATECHOLATO COMPLEXES AS REACTION INTERMEDIATES IN THE VANADIUM CATALYZED OXYGENATION OF CATECHOLS
Authors: Tatsuno Yoshitaka , Tatsuda Masanobu , Otsuka Sei , Tani Kazuhide
Published: July 2006

New vanadium–catecholato complexes containing a Schiff base ligand, [V(salen)(DBcatH)2]·1/2 CH2Cl2, [V(salen)(DBpyrH2)2]·1/2 H2O, [V(salen)(cat)]·1/10 CH2Cl2, [V(salen)(Bcat)]·H2O, [V(saldpt)(DBcatH)]·CH2Cl2 were prepared and characterized by elemental analyses and spectroscopic methods. Their relationship to the vanadium(III or IV)-catalyzed oxygenation of catechol was discussed.
A NOVEL METHOXYMETHYLATION OF ARYL BROMIDE BY METHOXYMETHYLTRIBUTYLTIN IN THE PRESENCE OF PALLADIUM COMPLEX
Authors: Kosugi Masanori , Sumiya Takashi , Ogata Toshimi , Sano Hiroshi , Migita Toshihiko
Published: July 2006

The reaction of aryl bromides with methoxymethyltributyltin in the presence of a catalytic amount of dichlorobis(triphenylphosphine)palladium was found to give arylmethyl methyl ether. The reaction is a novel aromatic methoxymethylation.
PREPARATION OF POROUS, AMORPHOUS, AND ULTRAFINE TiO2 PARTICLES BY CHEMICAL VAPOR DEPOSITION
Authors: Komiyama Hiroshi , Kanai Takashi , Inoue Hakuai
Published: July 2006

Ultrafine TiO2 particles were prepared by chemical vapor deposition of titanium tetraisopropoxide. The particle formation reaction, being catalyzed by the TiO2 deposit on the reactor wall, took place even at as low a temperature as 250°C, according to the stoichiometric relation of Ti(C3H7O) →TiO2 + 4C3H6 + 2H2O. The TiO2 particles were amorphous and porous, the specific surface area of which reached 300 m2/g.
RESPONSE OF A SOLID-STATE POTENTIOMETRIC SENSOR USING LaF3 TO A SMALL AMOUNT OF H2 OR CO IN AIR AT LOWER TEMPERATURES
Authors: Kuwata Shigeki , Miura Norio , Yamazoe Noboru , Seiyama Tetsuro
Published: July 2006

A solid electrolyte cell using LaF3 was found to be able to detect a small amount of H2 or CO in air at lower temperatures. The 90% response of the electromotive force (EMF) of the sensor to 1.3% H2 in air was as fast as 3 min at 20 °C. The sensing mechanism is attributed to a mixed electrode potential on the sensing electrode.
MÖSSBAUER SPECTROSCOPIC STUDIES OF MERCURY(II) CHLORIDE ADDUCTS OF BIFERROCENE AND BIFERROCENYLENE
Authors: Watanabe Masanobu , Suto Kyoko , Motoyama Izumi , Sano Hirotoshi
Published: July 2006

Biferrocene and biferrocenylene react with HgCl2 in diethyl ether to give their HgCl2 adducts. In the 57Fe-Mössbauer spectrum, the former shows a large quadrupole splitting value, suggesting the presence of a direct interaction between the Fe and Hg atoms and the latter shows a smaller quadrupole splitting value, indicating the presence of the averaged-valence state of Fe(II) and Fe(III).
SOLVENT EFFECTS ON THE COPOLYMERIZATION OF 5-HEXENE-2,4-DIONE AND STYRENE
Authors: Masuda Seizo , Tanaka Masami , Ota Tadatoshi
Published: July 2006

Solvent effects on the copolymerization of 5-hexene-2,4-dione and styrene have been studied. The contributions of polarity and polarizability effects and of monomer-solvent interactions were estimated according to the “Solvatochromic Comparison Method” developed by Taft et al.
STEREOSELECTIVE SYNTHESIS OF DIMETHYL TETRACYCLO[5.2.1.02.6.03.8]DECANE-7,8-DICARBOXYLATE
Authors: Camps Pelayo , Castañe Joan , Santos María Teresa
Published: July 2006

A short synthesis of the titled compound, a possible intermediate to prepare dodecahedrane, whose key-steps are the stereoselective trimethylene-annelation in the C2 and C3 positions of dimethyl 7,7-diethoxynorbornane-2,3-dicarboxylate and the high-yield intramolecular C–H insertion of a carbene generated from a 10-oxotricyclo[5.2.1.02.6]decane derivative, is described.
SYNTHESIS OF 2,6-DIACETYL-4-C(β-d-GLUCOPYRANOSYL)-4-HYDROXYCYCLOHEXANE-1,3,5-TRIONE AND ITS ACID HYDROLYSIS
Authors: Obara Heitaro , Matsui Yuzo , Namai Sozo , Machida Yoshihisa
Published: July 2006

2,6-Diacetyl-4-C-(β-d-glucopyranosyl)-4-hydroxycyclohexane-1,3,5-trione was obtained by the deacetylation of 2,6-diacetyl-4-C-(2,3,4,6-tetra-O-acetyl-β-d-glucopyranosyl)-4-hydroxycyclohexane-1,3,5-trione which prepared by the C-glucosylation of 2,6-diacetyl-1,3,4,5-benzenetetrol with 2,3,4,6-tetra-O-acetyl-α-d-glucopyranosyl bromide. The acid hydrolysis of this new C-glucoside was investigated.
OPTICALLY ACTIVE NAPROXEN BY KINETIC RESOLUTION
Authors: Franck Amelie , Rüchardt Christoph
Published: July 2006

Optically active naproxen is prepared from it’s racemic precursor by kinetic resolution via the anhydride and it’s reaction with optically active 1-(4-pyridyl)ethanol in high chemical and optical yield.
MAJOR AQUEOUS CHLORINATION PRODUCTS OF OXIDIZED FULVIC ACID
Authors: Arai Hidehiko , Arai Michimasa , Sakumoto Akihisa
Published: July 2006

Dichloro- and trichloroacetic acids as well as chloroform were identified as the major chloroorganics formed by chlorination of an aqueous solution of fulvic acid extracted from leaf mold (a model raw drinking water) oxidized with ozone or by a simultaneous use of ozone and ionizing radiation.
Zr-CATALYZED OXIDATION OF ALCOHOLS TO ALDEHYDES IN THE PRESENCE OF tBuOOH. HIGH REACTIVITY FOR PRIMARY AND ALLYLIC HYDROXYL FUNCTIONS
Authors: Kaneda Kiyotomi , Kawanishi Yasuyuki , Teranishi Shiichiro
Published: July 2006

ZrO(OAc)2 catalyzes selective oxidation of primary alcohols to aldehydes without formation of carboxylic acids and also chemoselective oxidation of allylic alcohols to α,β-unsaturated aldehydes in the presence of tBuOOH.
SYNTHESIS OF FUSICOCCA-2,8,10-TRIENE, A BIOGENETIC MISSING LINK, STARTING FROM STEREOSPECIFIC CONDENSATION OF TWO IRIDOID SYNTHONS
Authors: Takeshita Hitoshi , Kato Nobuo , Nakanishi Kohji , Tagoshi Hirotaka , Hatsui Toshihide
Published: July 2006

From two units of iridoid C10-synthons which could be prepared from one of the photoadducts of isoprene and methyl 2,4-dioxopentanoate, the hydrocarbon which can be designated as fusicocca-2,8,10-triene, a missing link in the biogenesis, was stereospecifally synthesized.
PREPARATION OF 1-ALKENYL PHENYL SULFIDES BY THE NICKEL(II)-COMPLEXES CATALYZED COUPLING REACTION OF 3-METHOXY-1-PHENYLTHIO-1-PROPENE WITH GRIGNARD REAGENTS
Authors: Sugimura Hideyuki , Takei Hisashi
Published: July 2006

The reaction of 3-methoxy-1-phenylthio-1-propene with aryl and primary alkyl Grignard reagents in the presence of nickel(II)–phosphine complexes in benzene or toluene proceeded chemo- and regioselectively to give 1-alkenyl phenyl sulfides in high yields.
ELECTROCHEMICAL BEHAVIORS OF ELECTRODEPOSITED POLY(N,N-DIMETHYLANILINE). A NEW ORGANIC SEMICONDUCTING ION-EXCHANGE POLYMER
Authors: Kitani Akira , Yano Jun , Sasaki Kazuo
Published: July 2006

Poly(N,N-dimethylaniline) film, deposited electrochemically on a Pt surface, is a semiconductor having an anion exchange ability. Electrochemical behaviors of poly(N,N-dimethylaniline) electrodes are remarkably different from those of polyaniline electrodes.
Li|LiI|IODINE GALVANIC CELLS USING IODINE-POLY(2,5-THIENYLENE) ADDUCTS AS ACTIVE MATERIALS OF POSITIVE ELECTRODES
Authors: Yamamoto Takakazu , Zama Masanobu , Yamamoto Akio
Published: July 2006

Iodine adducts of poly(2,5-thienylene) serve as good active materials of positive electrodes of Li|LiI| iodine galvanic cells. Discharge curves of the galvanic cells at 500 kΩ load show stable voltage (2.8–2.3 V) until about 85% of iodine added is consumed in the cell reaction.
NOVEL SYNTHESIS OF 3-(N-SUBSTITUTED AMINO)-1-ISOINDOLENONES FROM 2-CYANOBENZALDEHYDE WITH AMINES
Authors: Sato Ryu , Senzaki Toshihide , Goto Takehiko , Saito Minoru
Published: July 2006

Various 3-(N-substituted amino)-1-isoindolenones were readily synthesized quantitatively by reactions of 2-cyanobenzaldehyde with amines at low temperature such as 20 °C.