bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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;
(Remark: Graphics omitted.).
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.