bluuebunny/crossref_metadata_2025 huggingface dataset:
UNSATURATED HYDROXY FATTY ACIDS, THE SELF DEFENSIVE SUBSTANCES IN RICE PLANT AGAINST RICE BLAST DISEASE
Authors: Kato Tadahiro , Yamaguchi Yoshihiro , Hirano Takumi , Yokoyama Toshiro , Uyehara Tadao , Namai Tsuneo , Yamanaka Susumu , Harada Nobuyuki
Published: July 2006

In addition to the previously described epoxy fatty acids, five hydroxy fatty acids were characterized as self defensive substances produced in the rice plant against rice blast disease.
PHOTOPRODUCTS FROM 5-ARYLPYRAZINE-2,3-DICARBONITRILE, STRUCTURE REVISION FOR THE MAIN PRODUCT
Authors: Tada Masaru , Tsuzuki Koichi
Published: July 2006

Photoproduct from 5-(3,4-dimethoxyphenyl)pyrazine-2,3-dicarbonitrile was determined to be a mixture of 2-decyano and 3-decyano derivative. The similar results were obtained with 5-[(benzo-15-crown-5)-4′-yl]pyrazine-2,3-dicarbonitrile.
CATALYTIC EFFECTS OF Mg2+ ION ON ELECTRON TRANSFER REACTIONS OF PHOTO-EXCITED FLAVIN ANALOGUES (3-METHYL-10-PHENYL-5-DEAZAISOALLOXAZINES AND 3-METHYL-10-PHENYLISOALLOXAZINE) WITH METHYL AND METHOXY SUBSTITUTED BENZENES
Authors: Fukuzumi Shunichi , Kuroda Sadaki , Tanaka Toshio
Published: July 2006

The Mg2+ ion acts as an efficient catalyst for the electron transfer reactions of photo-excited flavin analogues (3-methyl-10-phenyl-5-deazaisoalloxazines and 3-methyl-10-phenylisoalloxazine) with methyl and methoxy substituted benzenes in acetonitrile. The catalytic effect of Mg2+ ion is caused by the complex formation between flavin analogues and Mg2+ ion.
PREPARATION OF AMORPHOUS NICKEL FILM CATALYSTS BY GLOW DISCHARGE
Authors: Imanaka Toshinobu , Tamaki Jun , Teranishi Shiichiro
Published: July 2006

The thin film of nickel alloys was prepared using a RF glow discharge sputtering system that was discharged between the inside and the outside electrodes of a reaction cell. It was determined by X-ray diffraction pattern that the nickel films prepared by the discharge under B2H6 atmosphere became an amorphous state.
BICYCLO[3.2.1]OCTA-2,6-DIEN-8-YLIDENE (HOMO-7-NORBORNADIENYLIDENE), A “FOILED” CARBENE
Authors: Brinker Udo H , König Lothar
Published: July 2006

Blcyclo[3.2.1]octa-2,6-dien-8-ylidene nearly exclusively rerranges by 1,2-vinyl migrations. The interaction with the double bond of the six-memberd ring dominates.
A NEW SKELETON SESQUITERPENOID FROM ALPINIA JAPONICA (THUNB.) MIQ.
Authors: Itokawa Hideji , Morita Hiroshi , Watanabe Kinzo , Iitaka Yoichi
Published: July 2006

A new skeleton sesquiterpenoid (alpiniol) was isolated from Alpinia japonica (THUNB.) MIQ. and the structure was determined by X-ray analysis.
ABSOLUTE CONFIGURATION AND CONFORMATIONAL MOBILITY OF DILOPHOL AND 3-ACETOXYACETYLDILOPHOL
Authors: Enoki Nobuyasu , Shirahama Haruhisa , Furusaki Akio , Suehiro Katsunao , Osawa Eiji , Ishida Ryoichi , Matsumoto Takeshi
Published: July 2006

Dilophol and 3-acetoxyacetyldilophol were isolated from Dictyota dichotoma and their absolute configurations and conformational behavior were clarified by X-ray analysis, NMR spectroscopy and molecular mechanics calculations.
SPIN STATE EQUILIBRIUM OF IRON(III) COMPLEX WITH PLANAR UNSYMMETRICAL QUADRIDENTATE SCHIFF BASE IN SOLUTION
Authors: Matsumoto Naohide , Kimoto Kazuhiro , Nishida Kazuhisa , Ohyoshi Akira , Maeda Yonezo
Published: July 2006

New iron(III) complex containing planar unsymmetrical quadridentate Schiff base, [FeIm2L]Bφ4, showed a striking thermochromism in solution, changing from dark red to green with decrease of the temperature, where Im, L, and Bφ4 denote imidazole, N-hydroxyacetophenone-N′-acetylacetone-ethylenediimine, tetraphenylborate, respectively. The electronic and ESR spectra established that the thermochromism is caused by the spin equilibrium between high spin(S=5/2) and low spin(S=1/2) of iron(III).
CRYSTAL STRUCTURE OF TRIMERIC BIS(ACETYLACETONATO)MANGANESE(II)
Authors: Shibata Shuzo , Onuma Shigeki , Inoue Hironao
Published: July 2006

The crystal structure of Mn(acac)2 has been determined by using three-dimensional X-ray counter data. The unit cell contains a formula unit of Mn3(acac)6, a centrosymmetric trimer, with the Mn–Mn distance of 3.108(2) Å. Each manganese atom is coordinated by six oxygen atoms of the ligands: the terminal manganese atom is in a distorted trigonal prism and the central atom in a trigonal antiprism.
PALLADIUM AND NICKEL-CATALYZED PERFLUOROALKYLATION OF ALDEHYDES USING ZINC AND PERFLUOROALKYL HALIDES
Authors: O’Reilly Neil J , Maruta Masamichi , Ishikawa Nobuo
Published: July 2006

A room temperature method for the conversion of perfluoroalkyl iodides to α-perfluoroalkyl carbinols under Pd or Ni catalysis is reported. The use of trifluoromethyl bromide provides an economical procedure for trifluoromethyl substituted carbinols.
ON THE ABSORPTION MAXIMA OF PROTONATED AROMATIC RETINAL SCHIFF BASE. AN INTERACTION WITH NON-CONJUGATED POSITIVE CHARGE
Authors: Sheves Mordechai , Rosenbach Varda
Published: July 2006

The absorption maxima of iminium salts of aromatic retinals are less affected by non-conjugated charge in the vicinity of the ring than iminium salts of retinals.
HIGH EFFICACY OF ULTRASONIC-PROMOTED REDUCTIVE ALKYLATION OF COAL
Authors: Miyake Mikio , Uematsu Ryoichi , Nomura Masakatsu
Published: July 2006

Yubari coal is efficiently anionized by sodium metal in hexamethylphosphoric triamide (HMPA) under ultrasonic irradiation at ambient temperature. An ethylated coal prepared from the anionized coal and ethyl iodide shows 90 wt% of solubility in benzene. The improved method solves problems of the conventional Sternberg method of reductive alkylation of coal.
ISOLATION AND STRUCTURES OF TWO NEW C-3/C-3″-BIFLAVANONES, NEOCHAMAEJASMIN A AND NEOCHAMAEJASMIN B
Authors: Niwa Masatake , Tatematsu Hiroshi , Liu Guo-Quan , Hirata Yoshimasa
Published: July 2006

Two new C-3/C-3″-biflavanones, neochamaejasmin A and B have been isolated from Stellera chamaejasme L. (Thymelaeaceae) and their structures have been elucidated on the basis of spectral data and some chemical evidence. Neochamaejasmin B is the first naturally occurring C-3/C-3″-biflavanone having the cis–trans geometry at the C-2/C-3 and C-2″/C-3″ positions.
FORMATION OF DIBENZ[b,f]OXEPINS FROM β-(o-ARYLOXYPHENYL)VINYL BROMIDES
Authors: Kitamura Tsugio , Kobayashi Shinjiro , Taniguchi Hiroshi
Published: July 2006

Photolysis of β-(o-aryloxyphenyl)vinyl bromides in methylene chloride as well as solvolysis in 60% EtOH gave dibenz[b,f]oxepins exclusively by a new type of intramolecular cyclization of vinyl cations.
TRANSIENT RAMAN SPECTRA OF ALL-TRANS- AND 9-CIS-RETINAL IN THE EXCITED TRIPLET STATE
Authors: Hamaguchi Hiro-o , Okamoto Hiromi , Tasumi Mitsuo
Published: July 2006

Transient Raman spectra of all-trans- and 9-cis-retina1 in the excited triplet state have been obtained using a Q-switched Nd:YAG laser. It has been found that the triplet Raman spectra of these two isomers are identical within the limit of experimental uncertainty suggesting the same triplet state in all-trans- and 9-cis-retinal.
SHINJULACTONE F, A NEW BITTER PRINCIPLE WITH A 5βH-PICRASANE SKELETON FROM AILANTHUS ALTISSIMA SWINGLE
Authors: Ishibashi Masami , Yoshimura Shin , Tsuyuki Takahiko , Takahashi Takeyoshi , Itai Akiko , Iitaka Yoichi , Matsushita Kazuhiro
Published: July 2006

A new quassinoid, shinjulactone F, was isolated from Ailanthus altissima SWINGLE and the structure was determined to be 1α,11-epoxy-1β,20-dihydroxy-5βH-picrasa-3,9(11)-diene-2,12,16-trione by X-ray analysis.
MARKED TEMPERATURE EFFECT ON THE ENANTIOSELECTIVE HYDROLYSIS IN ARTIFICIAL MEMBRANES
Authors: Ueoka Ryuichi , Matsumoto Yoko , Nagamatsu Toshiro , Hirohata Shoichi
Published: July 2006

The enantioselectivity was markedly elevated at temperatures somewhat higher than the phase transitions for the hydrolysis of hydrophobic amino acid esters (p-nitrophenyl N-dodecanoyl-d(l)-phenylalaninate) by a hydrophobic dipeptide (tetradecanoyl-l-histidyl-l-leucine) in the artificial membrane (dialkyldimethylammonium bromides) systems.
THE COOPERATIVE CARRIERS COMPOSED OF ALKANOIC ACID AND CROWN ETHER EXHIBITING EXCELLENTLY SELECTIVE Na+ OR K+ TRANSPORT
Authors: Inokuma Seiichi , Yabusa Kazuya , Kuwamura Tsunehiko
Published: July 2006

In the presence of higher alkanoic acids, 15-membered crown ethers actively transported Na+ over Li+ and K+ with high selectivity and 18-membered ones exclusively transported K+ in the chloroform membrane system. The transport ability and ion-selectivity are well corresponding to lipophilicity of the cooperative carrier and the cavity size of the crown ether used, respectively.
PREPARATION OF CHIRAL SULFONES BY ASYMMETRIC ADDITION OF ARENESULFONYL CARBANIONS TO ACETONE
Authors: Akiyama Takahiko , Shimizu Makoto , Mukaiyama Teruaki
Published: July 2006

In the presence of a chiral diamine, the magnesium salt of tolyl sulfone reacts with acetone at the α-carbon to afford the corresponding β-hydroxy adduct in good optical purity.
A NOVEL ACID-RESISTANT ACETAL-TYPE PROTECTIVE GROUP FOR ALCOHOLS
Authors: Mukaiyama Teruaki , Ohshima Masahiro , Nagaoka Hitoshi , Murakami Masahiro
Published: July 2006

Alcohols are protected on treatment with 2-benzyloxy-3-fluoro-1-propene in the presence of a catalytic amount of PdCl2(COD), and the resulting acetals are easily deprotected to regenerate the parent alcohols by catalytic hydrogenation. The acetals, the protected alcohols, are rather resistant to acidic hydrolysis in comparison with common acetals because of the presence of fluoromethyl group.
VIBRATIONAL CIRCULAR DICHROISM OF THE OH STRETCHING VIBRATIONS IN METHYL 3-HYDROXYBUTYRATE AND METHYL LACTATE
Authors: Nakao Yoshihiko , Sugeta Hiromu , Kyogoku Yoshimasa
Published: July 2006

The vibrational circular dichroism associated with the OH stretching vibrations of methyl 3-hydroxybutyrate and methyl lactate has been measured in the CCl4 solutions. The bisignate feature of VCD observed in methyl 3-hydroxybutyrate has been interpreted as the coexistence of rotational isomers in intramolecularly hydrogen bonded species.
CATALYTIC ACTIVITY PATTERNS AND REDOX PROPERTIES OF H3PMo12O40 AND ITS ALKALI SALTS
Authors: Mizuno Noritaka , Misono Makoto
Published: July 2006

Redox processes (reductions by H2 and CO, and reoxidation by O2) over MxH3−xPMo12O40 (x=0-3, M=Na, Cs) were classified into two groups. This classification was important in catalytic oxidations of H2 and CO, which proceeded by redox mechanism.
SYNERGY BETWEEN Cu AND ZnO FOR METHANOL CONVERSIONS OVER Cu-ZnO CATALYSTS
Authors: Okamoto Yasuaki , Fukino Kiyotaka , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

It was found that Cu–ZnO catalysts showed maximum specific activities at the composition of 70 wt% CuO for the CH3OH conversions both in the absence and presence of H2O. Taking into considerations the kinetic isotope effects and the electronic state and particle size of the Cu metal, it is proposed that the synergistic promotion is bifunctional in nature.
OXYGEN ENRICHMENT BY FLUOROCARBON BILAYER FILMS
Authors: Kunitake Toyoki , Higashi Nobuyuki , Kajiyama Tisato
Published: July 2006

Casting of aqueous fluorocarbon bilayers with and without poly(vinyl alcohol) produced self-supporting films in which the bilayers are aligned parallel to the film plane. Permeation of O2 through these films was faster by factors of 2.4 to 2.7 than that of N2.
A MICROSAMPLING TECHNIQUE UTILIZING AN ELECTROTHERMAL TUNGSTEN-BOAT VAPORIZATION DEVICE FOR ATMOSPHERIC PRESSURE HELIUM MICROWAVE-INDUCED PLASMA EMISSION SPECTROMETRY
Authors: Chiba Koichi , Kurosawa Masao , Tanabe Kiyoshi , Haraguchi Hiroki
Published: July 2006

A discrete microsampling technique using an electrothermal tungsten-boat vaporization device has been applied to atmospheric pressure helium microwave-induced plasma emission spectroemtry. The detection limits of 10−10–10−9 g were obtained for Cd, Cu, Fe, Pb, Zn, and P, and the reproducibilities were in the range of 2.4–11.4%.
CRYSTAL STRUCTURE AND ELECTRICAL CONDUCTIVITY OF (BPDT-TTF)3(PF6)2
Authors: Kato Reizo , Mori Takehiko , Kobayashi Akiko , Sasaki Yukiyoshi , Kobayashi Hayao
Published: July 2006

The crystal of (BPDT-TTF)3(PF6)2 (BPDT-TTF=bis(propylenedithio)-tetrathiafulvalene) contains the one-dimensional columns of BPDT-TTF molecules along the a axis. These columns are interrelated to each other by close S···S contacts. The non-planarity of the molecule results in a relatively small number of intra- and inter-stack close S···S contacts. The conductivity is thermally activated, and the anisotropy of the conductivity is σa:σb:σc=1:10−1:10−3.
ISOTOPIC EQUILIBRATION REACTION OF DINITROGEN OVER RANEY RUTHENIUM WITH AND WITHOUT POTASSIUM
Authors: Ogata Yoichi , Aika Ken-ichi , Onishi Takaharu
Published: July 2006

Turn over frequency (TOF) of isotopic equilibration reaction of N2 over Raney-Ru was as high as those over supported Ru catalysts with K, showing the striking effectiveness of the residual Al metal as a chemical promoter. Raney-Ru when promoted with K had the highest TOF for this reaction among the data so far reported.
TETRAHYDROTHIOPYRAN-4-ONE. A USEFUL 5 C SYNTHON FOR THE SYNTHESIS OF 3-CYCLOPENTENONES
Authors: Matsuyama Haruo , Miyazawa Yasuyuki , Takei Yuji , Kobayashi Michio
Published: July 2006

2-Alkyl-3-cyclopentenones were prepared in moderate yields starting from tetrahydrothiopyran-4-one by the one-pot Ramberg–Bäcklund reaction of 6-alkyl-1,4-dioxa-8-thiaspiro[4.5]decane 8,8-dioxides, followed by acid catalyzed de-dioxolanation.
DETERMINATION OF TRACE AMOUNTS OF DIBUTYLTIN(IV) DICHLORIDE BY DIFFERENTIAL PULSE ANODIC STRIPPING VOLTAMMETRY
Authors: Kitamura Hideki , Yamada Yasumasa , Nakamoto Masao
Published: July 2006

Differential pulse anodic stripping voltammetry with a hanging mercury drop electrode was employed successfully for the determination of dibutyltin(IV) dichloride in the range of 3–50 μg dm−3 at the deposition time of 60 s in 50% (v/v) ethanol-water medium (pH 7.3).
KINETICS OF CRYSTAL GROWTH AND DISSOLUTION PROCESSES OF VARIOUS COBALT(III) COMPLEXES IN AQUEOUS SOLUTIONS
Authors: Yoshikawa Yuzo , Dhar Pankaj S , Yamatera Hideo
Published: July 2006

A spectrophotometrie method has been developed for studying the kinetics of crystallization and dissolution processes of metal coordination compounds. The crystal growth and dissolution of the cobalt(III) complexes are controlled by a reaction at the crystal surface. The order of the reaction is between 1 and 2 indicating the crystal growth and dissolution processes proceeded by a surface controlled mechanism.
INTERMOLECULAR DEHYDRATION BETWEEN CARBOXYLIC ACIDS AND ALCOHOLS BY THE USE OF DIETHYL AZODICARBOXYLATE AND 3-METHYLBENZOTHIAZOLE-2-SELONE
Authors: Mitsunobu Oyo , Takemasa Akira , Endo Ryosuke
Published: July 2006

The reaction of carboxylic acids with alcohols in the presence of diethyl azodicarboxylate and 3-methylbenzothiazole-2-selone gave the corresponding esters with retention of configuration at the alcoholic carbon atom.
THE MECHANISM OF THE FORMATION OF OXONITINE BY PERMANGANATE OXIDATION OF ACONITINE
Authors: Amiya Takashi , Kanaiwa Yoshio , Bando Hideo , Suginome Harusada
Published: July 2006

An isotopic labeling study has shown that the N-formyl group of oxonitine, a product of permanganate oxidation of aconitine in a 95:5 acetone-water, originates from the methylene group of the N-ethyl of aconitine.
WATER-RESISTANT CARBON MONOXIDE ABSORBENTS COMPOSED OF ALUMINIUM COPPER(I) CHLORIDE AND TWO-AROMATIC RING-COMPOUNDS
Authors: Hirai Hidefumi , Hara Susumu , Komiyama Makoto
Published: July 2006

Solutions composed of aluminium copper(I) chloride and 1,3-diphenylpropane, 1,2-diphenylethane, diphenyl ether or styrene oligomer rapidly absorbed carbon monoxide at 60–70 °C under 1 atm (CO:N2=0.94:0.06). The absorbing power of the solutions remained unchanged even after the contacts with a nitrogen gas containing 10 mol% water to the charged copper(I) chloride.
AN EFFECT OF TRIFLUOROMETHYL GROUP ON PHOTOSENSITIZING BEHAVIOR OF BENZOPHENONE DERIVATIVES
Authors: Takuma Keisuke , Kimura Tokiya , Sonoda Takaaki , Kobayashi Hiroshi
Published: July 2006

2,2′-Bis(trifluoromethyl)benzophenone acted as an efficient and stable photosensitizer in energy transfer and hydrogen transfer reactions.
OXYGEN-SORPTIVE PROPERTIES AND DEFECT STRUCTURE OF PEROVSKITE-TYPE OXIDES
Authors: Teraoka Yasutake , Yoshimatsu Masahiro , Yamazoe Noboru , Seiyama Tetsuro
Published: July 2006

The nature of two types of oxygen desorption, α and β, from perovskite-type oxides was studied by TPD and TG experiments. The results show that α oxygen is accomodated in the oxygen vacancies formed by the partial substitution of A site cations, while the desorption of β oxygen corresponds to the reduction of B site cations to lower valencies.
NOVEL REACTIONS OF AMINOOXOSULFONIUM YLIDE WITH EPOXIDES
Authors: Okuma Kentaro , Nishimura Kenshin , Ohta Hiroshi
Published: July 2006

Reactions of (dimethylamino)phenyloxosulfonium methylide with epoxides were carried out. When aromatic epoxides were used as substrates, cyclopropyl sulfones and oxetanes were obtained. When aliphatic epoxides were used, the products were only the cyclopropyl sulfones. While the aminooxosulfonium ylide acts as a methylene transfer reagent to give the corresponding oxetanes, an intramolecular SN2 type reaction of the betaines led to cyclopropyl sulfones.
CYANATION OF ACETALS WITH t-BUTYL ISOCYANIDE–TiCl4 SYSTEM
Authors: Ito Yoshihiko , Imai Hiroshi , Segoe Kazuo , Saegusa Takeo
Published: July 2006

Cyanation of acetals was achieved by t-butyl isocyanide in the presence of TiCl4, producing cyanohydrin ethers in good yields. β-(Trimethylsilyl)ethyl isocyanide in the combination with TiCl4 effected the cyanation as well.
AN ASYMMETRIC SYNTHESIS OF GLYCEROL DERIVATIVES BY THE ENANTIOSELECTIVE ACYLATION OF PROCHIRAL GLYCEROL
Authors: Ichikawa Junji , Asami Masatoshi , Mukaiyama Teruaki
Published: July 2006

Optically active glycerol derivatives are obtained in up to 84% e.e. by the selective acylation of the tin(II) alkoxides generated from 2-O-arylsulfonylglycerols and 1,1′-dimethylstannocene or (methylcyclopentadienyl)tin(II) chloride by the use of a chiral diamine derived from (S)-proline as a ligand.
PRELIMINARY RESULTS IN CYCLOADDITION OF DIPHENYLNITRILIMINE TO PHOSPHINDOLE OXIDES
Authors: Sedqui Ahmed , Vebrel Joël , Laude Bernard
Published: July 2006

Diphenylnitrilimine cycloaddition reactions to two phosphindoles oxides are regiospecific and stereospecific. The approach of the dipole occurs from the less hindered diastereotopic side of the dipolarophile.
ADDITION OF α-HALOSULFINYL CARBANIONS TO IMINES. CONVENIENT PREPARATIONS OF SUBSTITUTED AZIRIDINES AND PYRROLES
Authors: Mahidol Chulabhorn , Reutrakul Vichai , Prapansiri Vichukorn , Panyachotipun Chitchanun
Published: July 2006

α-Lithio-α-chloro- and -α-fluoromethyl phenyl sulfoxides react with N-(benzylidene)anilines to give the corresponding aziridines in good yields. Pyrolyses of these compounds in the presence of dimethyl acetylenedicarboxylate result in substituted pyrroles in high yields.
OBSERVATION OF RESTRICTED ROTATION ABOUT C–O BONDS BY NMR SPECTROSCOPY IN 9-(2-ALKYLPHENOXY)TRIPTYCENES, A GEAR ROTATION SYSTEM
Authors: Yamamoto Gaku , Oki Michinori
Published: July 2006

Dynamic NMR study on 9-(2-alkylphenoxy)-1,4-dimethyltriptycenes revealed that, when the o-alkyl group is methyl or isopropyl, two conformers, ap and ±sc, are separately observed at room temperature and that the interconversion between them occurs by gear rotation with an energy barrier of ca. 18 kcal mol−1
DYNAMIC NMR STUDY OF RATES OF IONIC DISSOCIATION OF 2-CHLOROACETOXY-4,4,5,5-TETRAMETHYL-1,3-DIOXOLANE
Authors: Oki Michinori , Ito Satoshi
Published: July 2006

Ionic dissociation of a carboxylate ester has been detected by the dynamic NMR technique for the first time. The title compound in toluene-d8 exhibits ΔH≠ and ΔS≠ of 4.1±0.9 kcal/mol and −40±3 e. u., respectively.
NOVEL SMECTIC C MESOGENS. 3-(2-HYDROXY-4-ALKOXYBENZYLIDENEAMINO)DIBENZOFURANS
Authors: Shimizu Yo , Kusabayashi Shigekazu
Published: July 2006

3-(2-Hydroxy-4-alkoxybenzylideneamino)dibenzofurans(1) were found to be smectic C(SC) mesogens, which do not contain an “alkyl-core-alkyl” type structure. This implies that the molecular symmetry as seen in the alkyl-core-alkyl structure is a favorable factor but not always required for the appearance of SC phase and that an appropriate magnitude of the lateral dipole moment is required for the core moiety in the case of an unsymmetrical molecule.
OCTANEOPENTYLCYCLOTETRASILANE. SYNTHESIS AND UNUSUAL PROPERTIES
Authors: Matsumoto Hideyuki , Minemura Masahiko , Takatsuna Kazutoshi , Nagai Yoichiro , Goto Midori
Published: July 2006

The entitled compound was synthesized and its molecular structure was determined by X-ray crystallography. Its unusual properties include the lowest energy CT band with TCNE yet observed for cyclotetrasilanes and the easiness of the decomposition of the Si4 framework on electron-impact fragmentation and thermolysis.
PHOTOREDOX BEHAVIOR OF TRI-μ-OXO-BIS[(5,10,15,20-TETRATOLYLPORPHINATO)NIOBIUM(V)]
Authors: Matsuda Yoshihisa , Sakamoto Shuji , Takaki Toshihiko , Murakami Yukito
Published: July 2006

The tri-μ-oxo dimer of (5,10,15,20-tetratolylporphinato)niobium(V), [NbV(ttp)]2O3, was reduced upon irradiation with the visible light in benzene containing an alcohol under anaerobic conditions, while the irradiation of the complex in benzene afforded oxygenated radical complexes under aerobic conditions.
DIFERROCENYLBENZENES AS CATALYSTS FOR PHOTOCHEMICAL HYDROGEN EVOLUTION
Authors: Akiyama Takeo , Kondo Akira , Kawaharada Yukihiko , Kajitani Masatsugu , Endo Akira , Shimizu Kunio , Sugimori Akira
Published: July 2006

The solar light irradiation of the system containing p-diferrocenylbenzene (1a), methylviologen (2), triethanolamine, and colloidal platinum-catalyst produces hydrogen. The efficiency of the hydrogen evolution from the 1a-2 system is comparable to that from the [Ru(bpy)3]2+-2 system. m-Di-ferrocenylbenzene (1b) is less effective than 1a. The higher photocatalytic activity of 1a than 1b is ascribed to the higher electron donating ability of 1a which is due to the resonant interaction between the two ferrocenyl groups.
1 : 2 HOST-GUEST BINDING BY DOUBLE γ-CYCLODEXTRIN
Authors: Fujita Kahee , Ejima Seiji , Imoto Taiji
Published: July 2006

A double γ-cyclodextrin host bridged with a disulfide bond included two molecules of methyl orange with an association constant (1.06×1011 M−2) which is the largest value ever reported for 1 : 2 (host : guest) bindings of γ-cyclodextrin, demonstrating the collaboration of the two cyclodextrin parts on guest binding.
REACTION OF A FUNCTIONALIZED NITRONE WITH THIOCARBOXYLIC ACIDS. A NEW SYNTHESIS OF 5-ACYLAMINOTHIAZOLES
Authors: Suda Kohji , Fuke Hidetoshi , Hino Fumio , Yijima Chino
Published: July 2006

Reaction of N-(1-cyanoalkyl)-α-phenylnitrones with thiocarboxylic acids offers a simple new route to 2-phenyl-4-alkyl-5-acylaminothiazoles.
A STEREOSELECTIVE SYNTHESIS OF 1 α-HYDROXY-VITAMIN D3
Authors: Nemoto Hideo , Kimura Toshihiko , Kurobe Hiroshi , Fukumoto Keiichiro , Kametani Tetsuji
Published: July 2006

A stereoselective synthesis of 1 α -hydroxy-vitamin D3 was achieved through the solvolysis of the 3,5-cyclovitamin D3 which was prepared from (−)-(3S,5R)-2-methylene-3-methoxymethyloxybicyclo[3.1.0]hexanecarboxaldehyde and the des-AB-8-bromomethylene-cholestane.
ACTIVITY SEQUENCE OF Mo(II) STRUCTURES CHEMICALLY ATTACHED ON SiO2 IN THE CATALYTIC HYDROGENATION OF ETHENE AND 1,3-BUTADIENE
Authors: Iwasawa Yasuhiro , Ito Nobuhiro , Chiba Tadahiro , Ishii Hitoshi , Kuroda Haruo
Published: July 2006

The catalytic activities of well-characterized SiO2-attached Mo(II)-monomer, Mo(II)-dimer and Mo(II)-cluster catalysts in the hydrogenation of ethene at 200 K and 1,3-butadiene at 273 K were studied to find a structural property of active sites controlling the catalysis in combination with EXAFS(Extended X-ray Absorption Fine Structure) studies. The hydrogenation activity markedly depended upon the separation(bond distance) and assembly of Mo atoms, the activity decreasing in the following order;

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A NOVEL SYNTHETIC METHOD OF OPTICALLY PURE α-SUBSTITUTED ALDEHYDE ACETALS BY THE USE OF REDUCTIVE 1,2-REARRANGEMENT
Authors: Honda Yutaka , Sakai Mitsuru , Tsuchihashi Gen-ichi
Published: July 2006

A new reductive 1,2-rearrangement of aryl (or alkenyl) groups of α-sulfonyloxy acetals to give the title compounds was developed by using the combination of i-BU2AlH and Et3Al, and this method was applied to the synthesis of optically pure (R)-(−)-α-curcumene.
A NEW APPROACH TO THE SYNTHESIS OF A LYTHRACEAE ALKALOID, LASUBINE II
Authors: Narasaka Koichi , Yamazaki Shigeru , Ukaji Yutaka
Published: July 2006

A lythraceae alkaloid, (±)-lasubine II, is synthesized via an acyclic syn-1,3-amino alcohol which is derived stereoselectively from a β-hydroxy ketone.
HYDROGENATION OF ETHYLENE ON SMALL PALLADIUM PARTICLES
Authors: Takasu Yoshio , Sakuma Tadashi , Matsuda Yoshiharu
Published: July 2006

Activation energy for hydrogenation of ethylene on small palladium particles, which were prepared by vacuum evaporation of palladium onto a graphite plate, has been revealed to decrease with decreasing palladium particle size.
AN EXPERIMENTAL PROBE INTO THE LUMO OF TRIPTYCENE
Authors: Inagaki Satoshi , Imai Takeo , Kawata Hirofumi
Published: July 2006

From the regioselectivity of deprotonation of 1,3-dimethyl-triptycene the LUMO of triptycene was concluded on some presently acceptable assumptions to be such e’ orbitals as expected from the significant contribution of the through-bond interaction.
ANION RADICAL-INDUCED DESILYLATION OF ORGANOSILANE. REACTIONS OF BENZYLSILANES WITH ALDEHYDES AND RELATED COMPOUNDS IN THE PRESENCE OF BUTYLLITHIUM OR LITHIUM METAL
Authors: Kanemasa Shuji , Tanaka Junji , Nagahama Hideki , Tsuge Otohiko
Published: July 2006

By the action of butyllithium or lithium metal in such polar aprotic solvent as DMF or HMPA in the presence of aldehydes or related compounds, some benzylsilanes suffer from anion radical-induced desilylation forming benzyl carbanions which add to the aldehydes and related compounds.
ACCELERATED DEACYLATION OF ACYLATED INTERMEDIATE BY HYDROXYL FUNCTIONALIZED SURFACTANT MICELLES
Authors: Ihara Yasuji , Okamoto Mari , Nango Mamoru , Koga Joichi
Published: July 2006

The rate constants of both acylation and deacylation processes in the hydrolysis of p-nitrophenyl esters by dipeptide catalysts have been determined in the presence of hydroxyl functionalized surfactant micelles. The functional surfactants enhance the deacylation rate constants and the large rate differences are observed between the dipeptide catalysts which have the reverse sequence of amino acid residues.
EXCELLENT, pH-SENSITIVE CATION-SELECTIVITIES OF BIS (MONOAZACROWN ETHER) DERIVATIVES IN MEMBRANE CATION TRANSPORT
Authors: Kimura Keiichi , Sakamoto Hidefumi , Koseki Yasuaki , Shono Toshiyuki
Published: July 2006

In cation transport through a membrane incorporating a lipophilic bis(monoaza-12-crown-4) derivative, extremely high sodium-selectivity is realized, which can be easily varied by pH values in the aqueous phase.
SIMPLE SYNTHESIS OF 3β,24-DIHYDROXYCHOL-5-EN-7-ONE BY OXIDATIVE CLEAVAGE OF THE SIDE CHAIN OF CHOLESTEROL
Authors: Takano Seiichi , Sato Seiji , Ogasawara Kunio
Published: July 2006

A Potential steroidal synthon, 3β,24-hydroxychol-5-en-7-one, has been prepared in facile manner from cholesterol by oxidative cleavage of the side chain with a mixture of 30% aqueous hydrogen peroxide, trifluoroacetic anhydride, and sulfuric acid.
GENERATION OF 7-METHOXYCARBONYL[5]PARACYCLOPHANE
Authors: Tobe Yoshito , Kaneda Teruhisa , Kakiuchi Kiyomi , Odaira Yoshinobu
Published: July 2006

7-Methoxycarbonyl[5]paracyclophane generated by photochemical valence isomerization of 8-methoxycarbonyl[5.2.2]propella-8,10-diene has been successfully characterized by UV and 1H NMR spectra.
SYNTHESIS OF AROMATIC THIOLS FROM ARYL IODIDES AND THIOUREA BY MEANS OF NICKEL CATALYST
Authors: Takagi Kentaro
Published: July 2006

Nickel(0) complex, generated in situ from bis(triethylphosphine)nickel(II) chloride and sodium cyanoborohydride, catalyzed the nucleophilic displacement of aryl iodides with thiourea. S-Aryl-isothiuronium salts or aromatic thiols were obtained in good yields after simple work-up procedures.
MICHAEL-TYPE ADDITIONS TO α,β-ENOYLIRON(CYCLOPENTADIENYL)DICARBONYL COMPLEXES AND ITS APPLICATION TO β-LACTAM SYNTHESIS
Authors: Ojima Iwao , Kwon Hyok Boong
Published: July 2006

Michael-type additions of amines and thiols to α,β-enoyliron(cyclopentadienyl)dicarbonyl complexes were carried out to give the corresponding new β-aminoalkanoyl- and β-thioalkanoyliron complexes in good to excellent yields. A β-aminoalkanoyliron complex was treated with bromine in the presence of triethylamine to give the expected β-lactam in an excellent yield.
NOVEL RHODIUM CLUSTER-CATALYZED REDUCTION OF NITROPROPANE TO PROPIONITRILE UNDER CO AND H2O
Authors: Kaneda Kiyotomi , Mori Teruaki , Kobayashi Masaya , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

Propionitrile is selectively formed by reduction of nitropropane using CO and H2O (8 atm of CO, 40 °C). Rhodium carbonyls combined with bases show high catalytic activity. Amines with high pKa values as additives give high yields of propionitrile.
FORMATION AND ‘OPSIN SHIFTS’ OF ARTIFICIAL RETINOCHROMES
Authors: Tsujimoto Kazuo , Ohashi Mamoru , Hara Reiko , Ozaki Koichi
Published: July 2006

Retinochromes in which the retinal is an artificial analog were synthesized, and their ‘Opsin Shifts’ were calculated. The values were compared with those of the natural retinochrome.
SYNTHESIS OF 2-(p-HYDROXYCINNAMOYL)-4-HYDROXY-4,6-DIMETHYLCYCLOHEXANE-1,3,5-TRIONE, AN ANALOG OF SAFFLOMIN A
Authors: Obara Heitaro , Machida Yoshihisa , Namai Sozo , Onodera Jun-ichi
Published: July 2006

The synthesis of 2-(p-hydroxycinnamoyl)-4-hydroxy-4,6-dimethylcyclohexane-1,3,5-trione, an analog of safflomin A, was investigated.
ALDOL CONDENSATIONS CATALYZED BY ORGANOALUMINUM REAGENTS
Authors: Naruse Yuji , Ukai Junzo , Ikeda Nobuo , Yamamoto Hisashi
Published: July 2006

A new synthetic procedure for the practical synthesis of β-trimethylsiloxyketones from silyl enol ethers and aldehydes has been described which heavily depends on organoaluminum reagent as an effective catalyst.
FISCHER–TROPSCH SYNTHESIS OF LIGHT OLEFINS CATALYZED BY Fe3(CO)12-MOH-HYZEOLITE AND Fe3(CO)12-MZSM5 (M=K OR Cs )
Authors: Mitsudo Take-aki , Boku Hideki , Murachi Satoshi , Ishihara Atsushi , Watanabe Yoshihisa
Published: July 2006

Fischer–Tropsch syntheses by two catalyst systems (A)Fe3(CO)12-MOH-HYZeolite and (B) Fe3(CO)12-MZSM5 (M=K or Cs) were performed using a pressurized fixed-bed flow reactor at 260-320 °C (CO/H2=1–1.5, 14 atm). On the catalyst (A), especially when M was Cs, the activity was very high (conversion of carbon monoxide was up to 75%) and stable. On both catalysts the main product was propylene.
EXCITED STATE MULTIPLICITY INVOLVED IN PHOTOCYCLOADDITION OF POLYMETHYLENE DICINNAMATES AS STUDIED BY QUENCHING EXPERIMENTS
Authors: Kuzuya Masayuki , Yokota Naohisa , Tanaka Mitsushi , Okuda Takachiyo
Published: July 2006

The excited state multiplicity involved in photocycloaddition of polymethylene dicinnamates was studied by quenching experiments using ferrocene, and the ratio of such multiplicities deduced from the Stern–Volmer plots based on a generalized Stern–Volmer expression was shown to vary depending upon the substituent and the methylene chain.
HIGHLY ENANTIOSELECTIVE REDUCTION OF δ-KETO ACIDS WITH FERMENTING BAKER’S YEAST. A FACILE SYNTHESIS OF OPTICALLY PURE (R)-(+)-5-HEXADECANOLIDE
Authors: Utaka Masanori , Watabu Hisashi , Takeda Akira
Published: July 2006

Optically pure (R)-(+)-hexadecanolide, (+)-5-tridecanolide, and (+)-5-nonanolide were prepared from the corresponding δ-keto acids by reduction with fermenting baker’s yeast.
KINETICS OF THE CLEAVAGE OF THE CHROMIUM–CARBON BOND IN N-2-HYDROXYETHYLETHYLENEDIAMINE-N,N′,N′-TRIACETATO (HYDROXYMETHYL)CHROMIUM(III) AND NITRILOTRIACETATO(HYDROXYMETHYL)AQUACHROMIUM (III)
Authors: Shimura Makoto , Ogino Hiroshi , Tanaka Nobuyuki
Published: July 2006

The hydrolysis of the Cr–C bond in N-2-hydroxyethylethylene-diamineN,N′,N′-triacetato(hydroxymethy1)chromium(III) (1) obeyed the rate law, -d[1]/dt = (k0 + k1[H+]) [1] at I = 1.0 (LiClO4) and 25.0 °C, while the reaction of nitrilotriacetato(hydroxymethyl)aquachromium(III) (2) obeyed -d[2]/dt = {(k0 + k0L[L]) + (k1 + k1L[L])[H+]}[2], where L denotes Hn nta(3−n)−.
OBSERVATIONS ON THE B3Σu− AND B″3Πu STATES OF SULFUR DIMER BY N2 LASER EXCITATION
Authors: Ban Taketora , Kasatani Kazuo , Kawasaki Masahiro , Sato Hiroyasu
Published: July 2006

Time-resolved fluorescence spectra from the B3Σu− and B″3Πu states of sulfur dimer have been studied by pumping the ground state 3Σg− dimer with a nitrogen laser at 337.1 nm. A lifetime of the B state was measured by an effusive molecular beam technique while that of the B″ state, by the bulb experiment. Quenching rates of these states were also obtained.
MAGNETIC FIELD EFFECT ON THE INTRAMOLECULAR HYDROGEN ABSTRACTION REACTION OF n-TETRADECYL ANTHRAQUINONE-2-CARBOXYLATE
Authors: Tanimoto Yoshifumi , Takashima Masanobu , Uehara Megumu , Itoh Michiya , Hiramatsu Mitsuo , Nakagaki Ryoichi , Watanabe Takeshi , Nagakura Saburo
Published: July 2006

The magnetic field effect on the intramolecular hydrogen abstraction of n-tetradecyl anthraquinone-2-carboxylate was studied in aerated 1,1,2-trichlorotrifluoroethane, using steady-state photolysis, two-step laser excitation fluorescence, and laser flash photolysis.
ELECTROCHROMISM OF GLASSES AND SPUTTERED AMORPHOUS FILMS IN THE SYSTEM Li2O–WO3–Nb2O5
Authors: Machida Nobuya , Sakono Ikuo , Tatsumisago Masahiro , Minami Tsutomu
Published: July 2006

Electrochromic absorption spectra were measured for rapidly quenched glasses and RF-sputtered amorphous films in the system Li2O–WO3Nb2O5. The absorption maximum was shifted to shorter wavelengths and the color varied from blue to brown with increasing Nb2O5 contents. The absorption maxima were broader in the sputtered films than in the rapidly quenched glasses, but no essential difference in absorption spectra was observed between the glasses and the sputtered films.
DRASTIC CHANGES OF CIRCULAR DICHROISM OF SYNTHETIC PHOSPHATE BILAYERS DUE TO INTERACTION WITH METAL IONS
Authors: Nakashima Naotoshi , Ando Reiko , Fukushima Hiroshi , Kunitake Toyoki
Published: July 2006

A chiral bilayer membrane containing the phosphate head group shows, in the crystalline phase, remarkably enhanced circular dichroism, which is suppressed specifically and sensitively by the interaction of the phosphate group with added ions.
SPONGIONELLIN AND DEHYDROSPONGIONELLIN, NEW FURANOSESTERTERPENES WHICH INHIBIT CELL DIVISION OF FERTILIZED STARFISH EGGS, FROM THE MARINE SPONGE SPONGIONELLA SP.
Authors: Kato Yuko , Fusetani Nobuhiro , Matsunaga Shigeki , Hashimoto Kanehisa
Published: July 2006

Two new furanosesterterpenes, spongionellin and dehydrospongionellin, have been isolated from the marine sponge Spongionella sp. Both compounds inhibit cell division of starfish eggs.
SYNTHESIS OF NATURAL AND UNNATURAL FRONTALIN
Authors: Hosokawa Takahiro , Makabe Yoshiki , Shinohara Toru , Murahashi Shun-Ichi
Published: July 2006

(S)-(−)- and (R)-(+)-Frontalin were synthesized, respectively, in high enantiomer excess from β-methallyl alcohol (2) by three-step procedure; (i) asymmetric epoxidation of 2, (ii) the epoxide opening with homoallylmagnesium bromide, and (iii) Pd(II)-catalyzed intramolecular acetalization.
SYNTHESIS OF (±)-NOR-STEREPOLIDE
Authors: Arai Yoshitsugu , Takeda Kunio , Masuda Katsutada , Koizumi Toru
Published: July 2006

A construction of the pentacyclic framework of sterepolide is described. Stereochemistry of the structure 2 is well established by unequivocal reaction sequences. The Diels-Alder adducts are transformed into a key intermediate 15 by a few steps. Conversion of 15 to 2 is effected by a Nazarov cyclization and subsequent selective reduction of the lactone carbonyl group.
TRITYL SALTS AS EFFICIENT CATALYSTS IN THE ALDOL REACTION
Authors: Kobayashi Shu , Murakami Masahiro , Mukaiyama Teruaki
Published: July 2006

In the presence of a catalytic amount of trityl salts, such as TrOTf, TrSbCl6, TrPF6, TrSnCl5, etc., silyl enol ethers react with aldehydes to give the corresponding aldols in good yields. The preferential formations of erythro or threo aldols become possible by the suitable choice of the counter anions of these trityl salts and the substituents on silicon of the enolates.
ENANTIOMER RESOLUTION OF AMINO ACIDS BY A POLYMER-SUPPORTED LIQUID MEMBRANE CONTAINING A CHIRAL CROWN ETHER
Authors: Yamaguchi Tomohiko , Nishimura Koichiro , Shinbo Toshio , Sugiura Masaaki
Published: July 2006

Differential transport of amino acids was examined through a polymer-supported liquid membrane containing a chiral crown ether, 2,3:4,5-bis[1,2-(3-phenylnaphtho)]-1,6,9,12,15,18-hexaoxacycloeicosa-2,4-diene. Enantiomer resolution ratio of 22.7 was obtained for Dl-phenylglycine. Differential uphill-transport was also achieved.
A SAd–SAd TRANSITION OF A HOMOLOGOUS SERIES OF 4-(4-ALKOXY-3-BROMOBENZOYLOXY)BENZOATES
Authors: Takenaka Shunsuke , Masuda Yoshihide , Kusabayashi Shigekazu , Nishihata Yasuo , Terauchi Hikaru
Published: July 2006

The thermal properties of some homologs of 4-cyanophenyl 4-(4-alkoxy-3-bromobenzoyloxy)benzoates have been examined, where the octyloxy homolog shows the reentrant phenomenon of a SAd–Nre–SAd–N–I type, and the nonyloxy and decyloxy homologs show the mesomorphism of a SAd–SAd–N–I type, and experience a SAd–SAd transition.
A SYNTHESIS OF Dl-PENTA-N,O-ACETYLVALIOLAMINE
Authors: Ogawa Seiichiro , Shibata Yasushi
Published: July 2006

Valiolamine, (2S)-(1,2,4,5/3)-5-amino-1-C-hydroxymethyl-1,2,3,4-cyclohexanetetrol, an α-glucosidase inhibitor isolated from Streptomyces hygroseopicus subsp. limoneus, has been synthesized as the racemic penta-N,O-acetyl derivative starting from Dl-1,2,3-tri-O-acetyl- (1,3/2,4)-4-bromo-6-methylene-1,2,3-cyclohexanetriol.
A HIGHLY STEREOSELECTIVE ROUTE TO 2-ALKENYLTRIMETHYLSILANES
Authors: Shimizu Nobujiro , Shibata Furmihiro , Tsuno Yuho
Published: July 2006

1,2-Epoxy-1,3-bis(trimethylsilyl)propane reacts with various Grignard reagents (RMgX) to give 1-R-2,3-bis(trimethylsilyl)-1-propanols which upon olefination with NaH or with BF3Et2O give the corresponding (Z) or (E)-2-alkenyltrimethylsilanes in moderate to good yields, respectively.
HETEROPOLY ANION-ASSISTED Rh CATALYSIS REVEALED IN THE HOMOGENEOUS SELECTIVE HYDROGENATION
Authors: Urabe Kazuo , Tanaka Yoshiyuki , Izumi Yusuke
Published: July 2006

When coupled with lithium salt of heteropoly acid, the Wilkinson complex RhCl(PPh3)3 catalyst became very active and selective for the semihydrogenation of alkyne to alkene and, more interestingly, exhibited sharp substrate-selectivity in hydrogenation of substituted alkenes.
CO HYDROGENATION OVER AN AMORPHOUS GOLD-ZIRCONIUM ALLOY
Authors: Shibata Masatoshi , Kawata Noboru , Masumoto Tsuyoshi , Kimura Hisamichi
Published: July 2006

An amorphous Au25Zr75 alloy showed a high catalytic activity for hydrogenation of carbon monoxide. Thus, the rate of methanation was 2.3 μmol s−1 g−1 under 6.0 MPa at 523 K, being much higher than that over Au/ZrO2 or ZrO2. It was found that the alloy was oxidized into metallic gold and ZrO2 under the reaction conditions.
ENANTIOFACE-DIFFERENTIATING HYDROGENATION OF 2-ALKANONES OVER MODIFIED RANEY NICKEL
Authors: Osawa Tsutomu
Published: July 2006

2-Octanone was hydrogenated over tartaric acid-NaBr-modified Raney nickel in the presence of pivalic acid at various temperatures. The hydrogenation at 50–60 °C gave the best result with regard to the optical yield. Almost 80% of the optical yields were attained in the hydrogenations of various 2-alkanones.
HIGHLY CONDUCTIVE SINGLE CRYSTALS OF METALLOPHTHALOCYANINE
Authors: Orihashi Yuji , Kobayashi Norihisa , Tsuchida Eishun , Matsuda Hiro , Nakanishi Hachiro , Kato Masao
Published: July 2006

Potassium dicyanocobalt(III)phthalocyanine was electrolyzed to form large single crystals (>4 mm) of cyanocobalt(III)phthalocyanine with interplaner distance of 3.45 Å which showed conductivity of 5.7×101 S/cm without doping.
SYNTHESIS OF NOVEL CROWN ETHER INCORPORATING THE (−)-(5S,6R,13S,14R)-5,6,13,14-TETRAHYDRO-5,13-METHANOCYCLOOCTA[1,2-a:5,6-a′]DINAPHTHALENE-6,14-DIOL SUBUNIT AS THE C2-SYMMETRIC CHIRAL CENTER
Authors: Naemura Koichiro , Fukunaga Rinko
Published: July 2006

(−)-5,6,13,14-Tetrahydro-5,13-methanocycloocta[1,2-a:5,6-a′]dinaphthalene-6,14-diol was synthesized and its absolute configuration was established. Optically active crown ether was prepared by using this glycol as a source of chirality and its chiral recognition property was examined.
DIASTEREOSELECTIVE SYNTHESIS OF 2,3-EPOXYALKYLPHOSPHONATES AND PHOSPHINATES BY EPOXIDATION
Authors: Nagase Toshio , Kawashima Takayuki , Inamoto Naoki
Published: July 2006

The title compounds were prepared highly diastereoselectively by treatment of 2-alkenylphosphonates and phosphinates with m-chloroperbenzoic acid or MoO5-HMPA complex in good yields.
ISOMER SELECTION OF 1,6-DIAMINOHEXANECADMIUM(II) TETRACYANONICKELATE(II) FOR m- AND p-TOLUIDINE. FORMATION OF 1,6-DIAMINOHEXANECADMIUM(II) TETRACYANONICKELATE(II)-m-TOLUIDINE(1/1) INCLUSION COMPOUND AND BIS(p-TOLUIDINE)-1,6-DIAMINOHEXANECADMIUM(II) TETRACYANONICKELATE(II) COMPLEX
Authors: Hasegawa Tai , Nishikiori Shin-ichi , Iwamoto Toschitake
Published: July 2006

Under substantially the same preparation conditions applied to the m- and the p-isomers of toluidine with the aqueous solution containing cadmium(II) chloride, potassium tetracyanonickelate(II), 1,6-diaminohexane, and some additives, the m-isomer gives an inclusion compound 1,6-diaminohexanecadmium(II) tetracyanonickelate(II)-m-toluidine(1/1) as well as the o-isomer does, whereas the p-isomer forms a metal complex bis (p-toluidine) -1,6-diaminohexanecadmium(II) tetracyanonickelate(II).
SUBSTITUTION OF THE AXIAL LIGAND IN BIS(3,4-DIMETHYLPYRIDINE)BIS (2,2′-DIFURYLGLYOXIMATO)IRON(II) BY CYANIDE IN CHLOROFORM
Authors: Sasaki Yoshihiro
Published: July 2006

The reaction of bis(3,4-dimethylpyridine)bis(2,2′-difurylglyoximato)iron(II), [Fe(Hfr)2(3,4-me2py)2], with \lap\bigcirc K CN is studied spectrophotometrically in chloroform, where \lap\bigcirc K CN represents KCN with 18-crown-6. The nitrogen base molecules in the complex are substituted stepwisely by cyanide. The mechanisms of the two reaction steps are discussed on the basis of the measurements of the pseudo-first-order rate constants.
[2,3]WITTIG REARRANGEMENT-BASED APPROACHES TO STEREOCONTROL OVER THREE CONTIGUOUS CHIRAL CENTERS. NEW ENTRIES TO THE (±)-PRELOG-DJERASSI LACTONE
Authors: Nakai Ei-ichi , Kitahara Ei-ichiro , Sayo Noboru , Ueno Yoshio , Nakai Takeshi
Published: July 2006

Three [2,3]Wittig-based approaches for stereocontrol over three contiguous chiral centers are described within the synthesis of the title lactone. In these methods, the erythro-selective [2,3]Wittig variants are combined with one of the stereoselective processes: the Michael addition, the radical cyclization, and the hydroboration.
CARBOXYLATION OF ALCOHOLS WITH CARBON MONOXIDE SUPERSATURATED IN STRONG ACID. FACILE SYNTHESIS OF 2,2-BIS(4-HALOPHENYL)ACETIC,-PROPIONIC, AND RELATED ACIDS
Authors: Takahashi Yukio , Yoneda Norihiko , Nagai Hiroshi
Published: July 2006

Using 97% H2SO4 supersaturated with carbon monoxide, bis(4-halophenyl)methanols, 1,1-bis (4-halophenyl) ethanols and related alcohols were transformed to the carboxylic acids in 60–95% yields.
PHOTO-INDUCED CHARGE SEPARATION IN CARBAZOLE-CONTAINING BILAYER MEMBRANE IN THE PRESENCE OF VARIOUS ELECTRON ACCEPTORS
Authors: Takeyama Naoki , Sakaguchi Hiroshi , Hashiguchi Yuichi , Shimomura Masatsugu , Nakamura Hiroshi , Kunitake Toyoki , Matsuo Taku
Published: July 2006

Double-chain ammonium amphiphile with carbazole moiety affords spontaneous assemblage, bilayer vesicles, in aqueous solution. Laser-excitation of aligned carbazole units in the bilayer liberates electron, which lead to long-living charge-separated states (ca. 50 μs-5 ms) in the presence of appropriate electron acceptors.
ALUMINIUM-27, PHOSPHORUS-31, AND SILICON-29 MAS NMR STUDIES OF THE SILICOALUMINOPHOSPHATE MOLECULAR SIEVE SAPO-5
Authors: Appleyard Ian P , Harris Robin K , Fitch Frank R
Published: July 2006

Multinuclear MAS NMR has been used to study, for the first time, a member of a new family of molecular sieves, the silicoaluminophosphates, SAPO-5. The silicon-29 NMR spectra are consistent with tetrahedral (framework) silicon and provide information concerning the method of substitution of the silicon atoms into the aluminophosphate lattice.
ENANTIOSELECTIVE SYNTHESIS OF α-HYDROXYTHIOACETALS BY THE BAKER’S YEAST REDUCTION OF α-KETOTHIOACETALS
Authors: Fujisawa Tamotsu , Kojima Eiji , Itoh Toshiyuki , Sato Toshio
Published: July 2006

Asymmetric reduction of a-ketothioacetals was achieved by fermenting baker’s yeast to afford optically pure α-hydroxythioacetals which play as equivalents of valuable α-hydroxy aldehydes. The utility of the present method was demonstrated in the stereo-selective syntheses of (4S,5S)- and (4S,5R)-4,5-dihydroxydecanoic acid γ-lactones from (S)-(−)-1-(1,3-dithian-2-yl)-1,4-butanediol.
HIGHLY CONDUCTIVE COMPLEXES OF BIS-1,2,5-THIADIAZOLO-TETRACYANOQUINODIMETHAN (BTDA-TCNQ) WITH AMINES
Authors: Yamashita Yoshiro , Suzuki Takanori , Saito Gunzi , Mukai Toshio
Published: July 2006

Charge–transfer complexes of bis-1,2,5-thiadiazolo-tetracyano–quinodimethan (BTDA-TCNQ) with various donors were prepared. The 1:1 complex of dimethyldihydrophenazine with BTDA-TCNQ was found to be highly conductive. Factors governing the conductivities were investigated.
LITHIUM ION TITRATION OF LAYERED TITANIC ACID, H2Ti3O7
Authors: Izawa Hajime , Yasuda Fumio , Kikkawa Shinichi , Koizumi Mitsue
Published: July 2006

A lithium ion titration curve of H2Ti3O7 was measured with pH value of solution in equilibrium with the exchanger. There might be two different exchangeable sites in the interlayer region of H2Ti3O7. A new metastable phase, Li2Ti6O13, was obtained by a dehydration of the Li+-exchanged product in the temperature range of 300–500 °C.
BIOMIMETIC RADICAL REARRANGEMENT OF A THIOESTER GROUP MEDIATED BY A COBALT COMPLEX, COBALOXIME
Authors: Tada Masaru , Inoue Kunimi , Sugawara Keiji , Hiratsuka Mitsunori , Okabe Masami
Published: July 2006

The possible involvement of cobalt in the radical rearrangement of a thioester group was tested by using cobaloxime as a mimic of cobalamin. The coexistence of cobaloxime(II) species stimulates the rearrangement of the thioester group. A coordinative interaction between sulfur and cobalt is proposed for the assistance of this rearrangement.
SELF-DIFFUSION OF METHYLAMMONIUM CATIONS IN THE HIGHEST TEMPERATURE SOLID PHASE OF (CH3NH3)2SO4 AS REVEALED BY 1H NMR TECHNIQUES
Authors: Ishida Hiroyuki , Matsuhashi Noritoshi , Ikeda Ryuichi , Nakamura Daiyu
Published: July 2006

The 1H NMR parameters of solid methylammonium sulfate were determined at various temperatures. A first-order phase transition was located at 428 K for this salt. Above this temperature, the cations were found to perform self-diffusion as well as overall rotation about their center of gravity.
CATALYTIC ELECTROREDUCTION OF MOLECULAR OXYGEN USING [5,10,15,20-TETRAKIS-(1-METHYLPYRIDINIUM-4-YL)PORPHINATO]MANGANESE
Authors: Kobayashi Nagao , Saiki Hiroshi , Osa Tetsuo
Published: July 2006

The water-soluble manganese porphyrin in the title was found to catalyze electroreduction of oxygen. The reaction could be explained by an electrochemical (EC) catalytic regeneration mechanism, and at the porphyrin concentrations of more than ca. 5×10−5 mol dm−3 two-electron reduction was attained. Electronic absorption and magnetic circular dichroism (MCD) spectroscopies have suggested that the active species of the porphyrin is in a high-spin divalent state.
INCLUSION PROPERTIES OF N,N,N′,N′-TETRAISOPROPYLOXAMIDE AND CRYSTAL STRUCTURE OF ITS 1:1 COMPLEX WITH 1-METHYLNAPHTHALENE
Authors: Toda Fumio , Tanaka Koichi , Tagami Yasunori , Mak Thomas C W
Published: July 2006

N,N,N′,N′-Tetraisopropyloxamide forms crystalline inclusion complexes with a variety of aromatic compounds, and X-ray analysis of its 1:1 complex with 1-methylnaphthalene showed that the aromatic guest molecules are stacked in columns parallel to the b axis.