bluuebunny/crossref_metadata_2025_split huggingface dataset:
HIGH ACTIVITY OF MoO3–SnO2 FOR HYDROCRACKING OF DIPHENYL ETHER AND DIPHENYLMETHANE
Authors: Stenberg Virgil I , Srinivas V R , Tanabe Kozo , Jin Tuo , Hattori Hideshi 
Published: July 2006

Abstract
Of four newly synthesized catalysts designed for coal liquefaction, MoO3–SnO2 was superior for use with diphenyl ether and diphenylmethane with either H2 or CO + H2O. This agrees with the results of using these catalysts with a sub-bituminous coal. Carbon monoxide and H2O is superior to H2 for ether cleavage, whereas H2 is better for hydrocarbon cleavage.
PHOTOCHEMICAL REACTION OF 2-AROYL- 3-ARYLNORBORNADIENES
Authors: Toda Takashi , Hasegawa Eietsu , Mukai Toshio , Tsuruta Haruki , Hagiwara Toshimitsu , Yoshida Toshio 
Published: July 2006

Abstract
Irradiation of 2-aroyl-3-arylnorbornadiene derivatives (1) afforded the corresponding quadricyclane derivatives (2) in good chemical yields and with excellent efficiencies (Φ=0.3–0.6). The quadricyclanes were converted to the original norbornadienes by treatment with trifluoroacetic acid, silver perchlorate, and silica gel, or by heating.
A NEW METHOD FOR THE SYNTHESIS OF α-l-THREOFURANOSIDES FROM ACYCLIC PRECURSOR
Authors: Mukaiyama Teruaki , Sugaya Toru , Marui Shogo , Nakatsuka Takashi 
Published: July 2006

Abstract
Stereoselective alkoxylation of acyclic precursor, (2S,3S)-2,3-O-isopropylidene-4-chloro-4-phenylthiobutyric acid methyl ester (3) in the presence of SnCl2–AgClO4, followed by Pd(OAc)2 promoted cyclization gave α-l-threofuranosides in good yields.
FACILE SYNTHESIS OF β-KETOESTERS BY A COUPLING REACTION OF THE REFORMATSKY REAGENT WITH ACYL CHLORIDES CATALYZED BY A PALLADIUM COMPLEX
Authors: Sato Toshio , Itoh Toshiyuki , Fujisawa Tamotsu 
Published: July 2006

Abstract
β-Ketoesters were obtained in good yields by the reaction of the Reformatsky reagent with acyl chlorides catalyzed by a palladium complex under mild conditions.
THE SYNTHESES OF HEXACARBONYL (TROPONE) DIIRON AND SEVERAL TRICARBONYLIRON COMPLEXES OF HEPTAFULVALENE
Authors: Morita Noboru , Asao Toyonobu 
Published: July 2006

Abstract
A new hexacarbonyl(tropone)diiron complex was isolated and characterized. Several carbonyliron complexes of heptafulvalene were also synthesized.
PHOTOREDUCTION OF ALKYL HALIDES BY AN NADH MODEL. EVIDENCE FOR ONE-ELECTRON TRANSFER MECHANISM
Authors: Fukuzumi Shunichi , Hironaka Katsuhiko , Tanaka Toshio 
Published: July 2006

Abstract
A model of NADH, 1-benzyl-1,4-dihydronicotinamide (BzlNH), reduces benzyl bromide and methyl iodide in the presence of pyridine in MeCN under irradiation of the visible light (λ &gt; 360 nm), yielding toluene and methane as main products, respectively. Evidence is presented for occurrence of one-electron transfer from the excited state of BzlNH to benzyl bromide or methyl iodide in the primary process of the photoreduction.
ELECTRON TRANSFER REACTIONS OF AN NADH MODEL WITH IRON(III) COMPLEXES. A TWO-STEP ELECTRON TRANSFER MECHANISM
Authors: Fukuzumi Shunichi , Kondo Yuji , Tanaka Toshio 
Published: July 2006

Abstract
A model of NADH, 1-benzyl-1,4-dihydronicotinamide (BzlNH), readily reduces [Fe(N–N)3]3+ (N–N = 2,2′-bipyridine and 1,10-phenanthroline) to [Fe(N–N)3]2+. The stoichiometry of the electron transfer reaction in the absence of a suitable base is such that BzlNH appears to be one-electron donor. In the presence of pyridine or p-cyanopyridine, however, BzlNH acts as an apparent two-electron donor, when the reduction of [Fe(N–N)3]3+ with BzlNH proceeds by a two-step process.
THE ENANTIOSELECTIVE BIOTRANSFORMATION OF α-TERPINEOL AND ITS ACETATE WITH THE CULTURED CELLS OF NICOTIANA TABACUM
Authors: Suga Takayuki , Hirata Toshifumi , Lee Ym Sook 
Published: July 2006

Abstract
In the biotransformation of the enantiomers of p-menth-1-en-8-ol (α-terpineol) and 8-acetoxy-p-menth-1-ene (α-terpinyl acetate) with the cultured suspension cells of Nicotiana tabacum, it was clarified that the cultured cells effected the hydroxylation at the 6-position of (4R)-(+)-enantiomer in preference to the (4S)-(−)-enantiomer, whereas the cells did the hydrolysis of the acetoxyl group and the hydroxylation of the ethylenic linkage of (4S)-(−)-α-terpinyl acetate in preference to the (4R)-(+)-enantiomer.
TAST POLAROGRAPHY OF OXOBIS(2,4-PENTANEDIONATO)VANADIUM(IV) IN AQUEOUS SOLUTIONS BY USING RAPIDLY DISLODGED MERCURY ELECTRODE
Authors: Tanaka Nobuyuki , Kato Yoshikiyo , Suzuki Shigeru , Yamada Akifumi 
Published: July 2006

Abstract
The tast polarography of [VO(acac)2] in aqueous solutions has been studied. Two well-defined separate waves of equal heights were obtained at a drop time of 0.5 s and a complex concentration of 0.23 mmol dm−3. The ill-defined polarograms of [VO(acac)2] in aqueous solutions were interpreted by the adsorption of some vanadium species produced by electrolysis at the surface of electrode.
NOVEL CARBON–CARBON BOND CLEAVAGE REACTIONS OF α-AZOHYDROPEROXIDES
Authors: Utaka Masanori , Fujita Yuji , Takeda Akira 
Published: July 2006

Abstract
1-Phenylazo-l-hydroperoxycyclohexanes, easily prepared by the autoxidation of cyclohexanone phenyl hydrazones, have been found to undergo C(1)–C(2) bond cleavages when treated with acids, bases, or reducing reagents under mild conditions. Thus 6-oxoalkanoic acids and their derivatives have been obtained in good yields from 2-hydroxycyclohexanone derivatives. The 2-hydroxyl group seems to play an important role for the cleavage.
DESULFURIZATION OF 2-THIOURIDINES BY DIPOTASSIUM DIAZENEDICARBOXYLATE
Authors: Ogihara Takuo , Mitsunobu Oyo 
Published: July 2006

Abstract
The reaction of 5-methoxycarbonylmethyl-2-thiouridine (la) with dipotassium diazenedicarboxylate and with N2H4–H2O2 afforded l-(β-d-ribofuranosyl)-5-methoxycarbonylmethyl-4-(lH)-pyrimidinone (3a) in good yields, suggesting that the reaction involves diimide. On treatment with H2O2, la also gave 3a.
STRUCTURAL AND ABSOLUTE CONFIGURATIONAL STUDIES OF STRIATENE, STRIATOL AND (β-MONOCYCLONEROLIDOL, THREE SESQUITERPENOIDS FROM THE LIVERWORT PTYCHANTHUS STRIATUS (LEHM. ET LINDEMB.) NEES
Authors: Takeda Reiji , Mori Reiko , Hirose Yoshio 
Published: July 2006

Abstract
Three new sesquiterpenoids, striatene, striatol and β-monocyclonerolidol, were isolated from the liverwort Ptychanthus striatus(Lehm. et Lindemb.) Nees. Their structures have been established by spectroscopic analysis and chemical transformation.
These compounds are interesting in terms of the evolution of the liverwort from algae.
DISTRIBUTION OF MANGANESE IN MANGANESE FERRITE PARTICLES PREPARED BY AIR OXIDATION OF HYDROXIDE SUSPENSIONS
Authors: Utsunomiya Taizo , Hoshino Yoshio 
Published: July 2006

Abstract
The distribution of manganese in manganese ferrite particles prepared by the air oxidation of coprecipitated hydroxide suspensions has been investigated from the dissolution curves by using the core-model. The mole fraction of manganese increases gradually from the center to the surface of the particles and also increases abruptly near the particle surface.
THE REACTION OF BENZYLAMINES WITH TRIALKYLALUMINUMS UNDER IRRADIATION
Authors: Omura Kanji , Furukawa Junji 
Published: July 2006

Abstract
Irradiation of benzylamines (PhCH2NR′R″) complexed with trialkylaluminums (R3Al) in benzene gives alkylbenzenes (PhCH3 and PhCH2R) and amines (HNR′R″). 1,2-Diphenylethane is also obtained as a side-product.
A NEW AND EFFECTIVE ASYMMETRIC SYNTHESIS OF 3-PHENYLALKANALS
Authors: Mukaiyama Teruaki , Hayashi Hiroki , Miwa Tetsuo , Narasaka Koichi 
Published: July 2006

Abstract
Highly optically active 3-phenylalkanals were obtained by the reaction of alkyl halides and a chiral homoenolate equivalent derived from the cinnamyl ether 3 and potassium diisopropylamide, followed by acidic hydrolysis.
THE COMPETITION BETWEEN INTER- AND INTRAMOLECULAR ELECTRON-TRANSFER PROCESS INVOLVING POLYPYRIDINERUTHENIUM(II) COMPLEXES WITH LINKED VIO-LOGEN UNITS IN SURFACTANT-TYPE VIOLOGEN ASSEMBLIES
Authors: Sakura Katsuhiko , Sakamoto Tetsuo , Matsuo Taku 
Published: July 2006

Abstract
Polypyridineruthenium(II) complex with linked viologen units was synthesized as the model of man-made photoreaction center. Luminescence quenching of the ruthenium complex by a surfactant-type viologen in micellar or bilayer membrane systems was resolved into inter- and intramolecular processes and it became apparent that the photoinduced charge separation in intramolecular process was more efficient than that in intermolecular process.
CATALYTIC ACTIVITY OF HEAT-TREATED Co(II)-TETRAPHENYLPORPHYRIN FOR CATHODIC REDUCTION OF OXYGEN
Authors: Okabayashi Katsuaki , Ikeda Osamu , Tamura Hideo 
Published: July 2006

Abstract
Heat treatment effect of Co(II)-tetraphenylporphyrin (Co-TPP) on the catalytic activity for cathodic reduction of oxygen was studied. The improved catalytic activity of Co-TPP heat-treated at temperatures between 500 and 700°C was found to be due to a remarkable increase in the conductivity and the variation of the electronic states of the central metal ion, resulting from an extension of π-electron system by polymerization.
UNUSUAL REGIOSELECTIVE HYDROSILYLATION OF ETHYNYLMETHYLDICHLOROSILANE WITH DIMETHYLCHLOROSILANE CATALYZED BY TETRAKIS(TRIPHENYLPHOSPHINE)PLATINUM(0)
Authors: Matsumoto Hideyuki , Hoshino Yoshikazu , Nagai Yoichiro 
Published: July 2006

Abstract
The hydrosilylation of ethynylmethyldichlorosilane with dimethylchlorosilane catalyzed by tetrakis(triphenylphosphine)platinum(0) was found to show quite an unusual regioselectivity to afford the geminal product, 1-(methyldichlorosilyl)-1-(dimethylchlorosilyl)ethene, almost exclusively.
PHOTOCATALYTIC ISOMERIZATION OF BUTENES OVER TiO2 AND ZnO
Authors: Kodama Sukeya , Yabuta Masaaki , Kubokawa Yutaka 
Published: July 2006

Abstract
Photocatalytic isomerization of butenes over ZnO and TiO2 has been investigated. With ZnO, 1-butene is more reactive than 2-butene, photoenhancement in the isomerization being attributable to photoformed O− hole centers. With TiO2, 2-butene is more reactive than 1-butene, which would result from a stronger interaction of the C=C bond of 2-butene with UV irradiated TiO2.
PHOTOCHEMICAL REACTIONS OF PYRIMIDIN-2(1H)-ONES: INTER- AND INTRAMOLECULAR HYDROGEN ABSTRACTION BY THE NITROGEN OF IMINO GROUP
Authors: Nishio Takehiko , Katahira Katsuhiro , Omote Yoshimori 
Published: July 2006

Abstract
Irradiation of 1-methyl-4,6-diphenylpyrimidin-2(1H)-one (1a) in acyclic or cyclic ethers afforded the C–C bonded 1:1-adducts (2a–c) of 1a and ether via intermolecular hydrogen abstraction of the excited imino nitrogen of 1a, while irradiation of 1-phenyl-4-(3-ethoxypropyl)-6-methylpyrimidin-2 (1H)-one (1g) gave 1-phenyl-4,6-dimethylpyrimidin-2(1H)-one (1d) via intramolecular hydrogen abstraction of the excited imino nitrogen of 1g, in addition to 2-oxo-l,3-diazabicyclo[2.2.0]hex-5-ene derivative (3g).
POLYSTYRENE-SUPPORTED ALUMINIUM COPPER CHLORIDE AS WATER-RESISTANT SOLID CARBON MONOXIDE ADSORBENT
Authors: Hirai Hidefumi , Hara Susumu , Komiyama Makoto 
Published: July 2006

Abstract
A solid adsorbent of carbon monoxide, polystyrene-supported aluminium copper(I) chloride, is prepared by use of carbon disulfide as solvent. The adsorbing activity of the resulting adsorbent shows no measurable decrease after the repeated contact with nitrogen gas containing a considerable amount of water.
AN EFFICIENT SYNTHESIS OF JOLKINOLIDE E INVOLVING THE BUTENOLIDE RING FORMATION BY INTRAMOLECULAR WITTIG REACTION
Authors: Katsumura Shigeo , Isoe Sachihiko 
Published: July 2006

Abstract
A synthesis of jolkinolide E from the bicyclic enone 3 using intramolecular Wittig reaction is described. In this synthesis a facile esterification method by means of a mixed anhydride of trichloroacetic acid catalyzed by DMAP, which culminates in the effective synthesis of the α,β,γ-trisubstituted butenolide ring, is also described.
ACTIVE METAL/OXIDE SYSTEMS FOR WATER DECOMPOSITION
Authors: Igarashi Akira , Asano Hiromichi , Kikuchi Yoshihiro , Ogino Yoshisada 
Published: July 2006

Abstract
Several Metal/WO3 systems (Metal = Re, Ir, Rh, Ru, Os, Pd, Pt) exhibit high hydrogen evolution activities when contacted with water vapor at 480°C. The use of WO3 along with a metal species is necessary to bring about the high activity. X-Ray diffraction data of Rh/W3O systems strongly suggest that W3O species formed by activation (reduction by H2) is responsible for the unique property of WO3.
A WATER-SOLUBLE SOLAR ENERGY STORAGE SYSTEM
Authors: Maruyama Kazuhiro , Tamiaki Hitoshi 
Published: July 2006

Abstract
In an alkaline aqueous solution, photochemical valence isomerization of norbornadiene derivative 1 to quadricyclane derivative 2 occurred quantitatively, and reverse isomerization of 2 to 1 under release of heat was achieved by catalytic action of cobalt hematoporphyrin 3 and analogues. This system may be of a great practical use for a solar energy storage.
C–CN BOND CLEAVAGE UNDER MILD CONDITIONS PROMOTED BY ELECTRON-RICH COBALT COMPLEXES
Authors: Ozawa Fumiyuki , Iri Kiyoshi , Yamamoto Akio 
Published: July 2006

Abstract
Electron-rich cobaltate dinitrogen complex, [Co(PPh3)3N2]Li(Et2O)3 1, reacts with alkyl and aryl nitrile compounds causing the cleavage of C–CN bond under mild conditions to release hydrocarbons. Catalytic activity of the cobalt complex to isomerize allyl cyanide to crotononitrile is also noted.
NUCLEOPHILIC SUBSTITUTION ON SULFUR WITH RETENTION OF CONFIGURATION IN THE FORMATION OF o-METHOXYPHENYL PHENYL-N-POLYHALOACETYLSULFILIMINES
Authors: Oae Shigeru , Kikuchi Katsuaki , Moriyama Masaru , Furukawa Naomichi 
Published: July 2006

Abstract
Optically active o-methoxyphenyl phenyl-N-polyhaloacetylsulfilimines obtained in good yields upon simple treatment of a mixture of o-methoxyphenyl phenyl sulfide and t-butyl hypochlorite in the presence of l-menthol and polyhaloacetamide anion, are found to be rich in R-configuration. This means that the nucleophilic substitution of the incipiently formed (Rs)-l-menthyloxysulfonium salt with the polyhaloacetamide anion proceeds with retention of configuration.
CYANOSELENENYLATION OF KETENE ACETALS. SYNTHESIS OF CARBONYL-PROTECTED α-OXO CARBONITRILES
Authors: Tomoda Shuji , Takeuchi Yoshito , Nomura Yujiro 
Published: July 2006

Abstract
The reaction of ketene acetals with phenyl selenocyanate afforded a new type of compounds, α,α-dioxy-β-phenylseleno carbonitriles(carbonyl-protected α-oxo carbonitriles), in good yields. Oxidation of these vicinal cyanoselenenylation products gave β,γ-unsaturated α,α-dioxy carbonitriles in excellent yields.
PROTON CONDUCTION IN THERMALLY TREATED ANTIMONIC ACID SAMPLES
Authors: Ozawa Yoshihiro , Miura Norio , Yamazoe Noboru , Seiyama Tetsuro 
Published: July 2006

Abstract
Antimonic acid samples thermally treated up to 893 K exhibited high proton conductivities of order of 10−1 S·m−1 at room temperature when the relative humidity was high. The humidity dependence of the conductivities changed with the heat treatment temperature, in coincidence with the changes in fine structure of the antimonic acid samples.
STRUCTURES AND CONFORMATIONS OF NEW NINE-MEMBERED RING DITERPENOIDS FROM THE MARINE ALGA DICTYOTA DICHOTOMA
Authors: Enoki Nobuyasu , Ishida Ryoichi , Matsumoto Takeshi 
Published: July 2006

Abstract
New nine-membered ring diterpenes acetyldictyolal (2), hydroxyacetyldictyolal (4) isodictyohemiacetal (5) and dictyodiacetal (7) have been isolated. Their structures and approximate conformations have been determined by spectral and chemical means.
ALKALINE PHOSPHATASE DISSOLVED IN NATURAL WATER
Authors: Haraguchi Hiroki , Kobayashi Kensei , Matsui Masahiro , Fuwa Keiichiro 
Published: July 2006

Abstract
Alkaline phosphatase activity dissolved in sea and lake water was determined, and alkaline phosphatase was identified as dissolved chemical species of trace metals (zinc) in natural water using high performance liquid chromatography (HPLC).
PREPARATION AND SOME PROPERTIES OF POLYTHIA[n]FERROCENOPHANES
Authors: Sato Masaru , Watanabe Hisayuki , Ebine Seiji , Akabori Sadatoshi 
Published: July 2006

Abstract
Polythiaferrocenophanes, 5, and 8–12, were prepared from 1,1′-ferrocenedithiol. Of these compounds, 1,4,7-trithia[7]ferrocenophane 8 showed an abnormal bathochromic shift in the electronic spectrum, and a downfield shift of the bridge-head carbons and an upfield shift of the other cyclopentadienyl carbons in the 13C-NMR spectrum. Compounds 9–12 also showed complexing affinity to silver ion according to the size of polythia-macrocycles.
HORSE LIVER ALCOHOL DEHYDROGENASE (HLADH) MEDIATED CHEMICOENZYMATIC ASYMMETRIC SYNTHESIS OF (+)-TWISTANE FROM cis-DECALIN-2,7-DIONE
Authors: Nakazaki Masao , Chikamatsu Hiroaki , Taniguchi Masatoshi 
Published: July 2006

Abstract
HLADH mediated reduction differentiated between the enantiotopic carbonyl groups in cis-decalin-2,7-dione (1) provide (−)-(7S,9S,10R)-7-hydroxy-cis-decalin-2-one (3) which was converted, via (+)-4, and (+)-6, into (+)-twistane (8) of high optical purity.
SELECTIVE SYNTHESES OF DENDROLASIN AND SESQUIROSEFURAN BY THE COUPLING OF 3-FURYLMETHYLMAGNESIUM BROMIDE WITH GERANYL DIETHYL PHOSPHATE
Authors: Araki Shuki , Butsugan Yasuo 
Published: July 2006

Abstract
Coupling reaction of 3-furylmethylmagnesium bromide with geranyl diethyl phosphate in the presence and the absence of copper(I) iodide affords dendrolasin and sesquirosefuran, respectively, in ca. 80 % selectivity.
TITANIUM-MEDIATED AND NEIGHBORING-GROUP ASSISTED δ-METHYLATION OF HOMOALLYL ALCOHOLS: A NEW REGIO- AND STEREOSELECTIVE CC-LINKING REACTION
Authors: Fujita Katsuramaru , Moret Etienne , Schlosser Manfred 
Published: July 2006

Abstract
Upon treatment with dimethyltitanium dichloride or trimethylaluminum in the presence of titanium tetrachloride, a hydrogen atom at the olefinic 4-position is replaced by a methyl group. Terminal homoallyl alcohols afford (E)-isomers. If the double bond is an internal one, the carbon chain (at the other side of the hydroxy group) leaves its original position to the entering methyl group and switches to the other one at the same carbon atom.
NOVEL RHODIUM DIOXYGEN COMPLEXES. REACTION OF THE DIOXYGEN LIGAND WITH THE COORDINATED OLEFIN
Authors: Sugimoto Ryuichi , Suzuki Hiroharu , Moro-Oka Yoshihiko , Ikawa Tsuneo 
Published: July 2006

Abstract
Novel dinuclear rhodium dioxygen complexes having olefinic ligand are prepared by the reaction of cationic rhodium diene complexes, [(1,5-cyclooctadiene)2Rh]+Y− or [(norbornadiene)2Rh]+Y− (Y− = BF4−, ClO4−), with potassium superoxide in dichloromethane.Transfer of the dioxygen ligand to the coordinated olefin is confirmed by pyrolysis of the complex under an atmosphere of 18O2.
TOTAL SYNTHESIS OF (±)-MAYSINE AND (±)-N-METHYLMAYSENINE
Authors: Isobe Minoru , Kitamura Masato , Goto Toshio 
Published: July 2006

Abstract
Maysine (1) and N-methylmaysenine (2), as congeners of the ansa-macrocyclic antitumor agent, maytansine, were synthesized from a common intermediate 3.
A SIMPLE CRITERION OF AN AUTOCATALYTIC PROCESS AT A STATIC MERCURY DROP ELECTRODE (SMDE)
Authors: Himeno Sadayuki , Saito Atsuyoshi 
Published: July 2006

Abstract
With the use of the SMDE, a simple criterion for distinguishing an autocatalytic process from a catalytic one is proposed; the limiting current for an autocatalytic wave increases with drop time, and the i-t curve shows a current increase with time on every drop. On the other hand, the limiting currents for diffusion, kinetic and catalytic waves decrease with drop time.
THE STRUCTURES OF FUKURINOLAL AND FUKURINAL, TWO NEW DITERPENOIDS FROM THE BROWN SEAWEED DILOPHUS OKAMURAI DAWSON
Authors: Ochi Masamitsu , Masui Norio , Kotsuki Hiyoshizo , Miura Iwao , Tokoroyama Takashi 
Published: July 2006

Abstract
The structures of fukurinolal and fukurinal, two new diterpenoids isolated from the brown seaweed Dilophus okamurai Dawson, have been established as 1 and 2, the latter possessing a novel bicyclic ring system, on the basis of spectral and chemical evidence.
SYNTHESIS OF THIENO[3,2-b]PYRIDINES
Authors: Yokoyama Masataka , Tohnishi Masanori , Kurihara Akemi , Imamoto Tsuneo 
Published: July 2006

Abstract
Several thieno[3,2-b]pyridines could be easily synthesized by methallation using LDA directly from 3-(disubstituted amino)-2-cyano-3-methylthioacrylonitriles.
SYNTHESIS OF 2,6-DIMETHYL-6-(8-METHYL-4-METHYLENE-7-NONENYL)-2-CYCLOHEXEN-1-YLMETHANOLS. A COMMENT ON THE STRUCTURE OF MAGYDAR-2,10(20),13-TRIEN-17-OL, THE DITERPENE OF MAGYDARIS PANACIFOLIA
Authors: Nagano Hajime , Ishikawa Yukari , Matsuo Yukiko , Shiota Michio 
Published: July 2006

Abstract
α-Santonin was stereoselectively converted to a pair of diastereomers of 2,6-dimethyl-6-(8-methyl-4-methylene-7-nonenyl)-2-cyclohexen-1-ylmethanols (Ia and Ib). Both spectral data of Ia and Ib were found to be different from those reported for magydar-2,10(20),13-trien-17-ol isolated from Magydaris panacifolia (Vahl) Lange, This indicates that the structure of the natural diterpene must be revised.
4-CHLOROPHENYL 5-CHLORO-8-QUINOLYL HYDROGEN PHOSPHATE: A USEFUL PHOSPHORYLATING AGENT FOR GUANOSINE 3′-PHOSPHOTRIESTER
Authors: Takaku Hiroshi , Kamaike Kazuo , Kasuga Kenichi 
Published: July 2006

Abstract
5′-O-Dimethoxytrityl-2′-O-tetrahydropyranyl-N2-benzoylguanosine smoothly reacts with 4-chlorophenyl 5-chloro-8-quinolyl hydrogen phosphate in the presence of 8-quinolinesulfonyltetrazolide (QS-te) to give 5′-O-dimethoxytrityl-2′-O-tetrahydropyranyl-N2-benzoylguanosine 3′-(4-chlorophenyl, 5-chloro-8-quinolyl) phosphate in high yield without a side product such as O6-phosphorylated guanosine.
PALLADIUM-PROMOTED TRANSFORMATION OF α,β-EPOXYSILANES TO α,β-UNSATURATED CARBONYL COMPOUNDS
Authors: Hirao Toshikazu , Yamada Naoto , Ohshiro Yoshiki , Agawa Toshio 
Published: July 2006

Abstract
Treatment of α,β-epoxysilanes with palladium(II) salt in DMF affords α,β-unsaturated carbonyl compounds, in which the carbonyl group appears on the carbon originally bearing the silyl group.
REACTIONS OF DIAMINO DISULFIDES, DIAMINO SULFIDES, AND DIAMINO SULFOXIDES WITH p-TOLUENESULFINIC ACID
Authors: Furukawa Mitsuru , Sato Kimitoshi , Okawara Tadashi 
Published: July 2006

Abstract
The reactions of diamino disulfides (2) and diamino sulfides (3) with p-toluenesulfinic acid (1) were found to give new types of compounds, amino p-toluenesulfonyl disulfides (5) and amino p-toluenesulfonyl sulfides (10), respectively. On the other hand, the reaction between dimorpholino sulfoxide (4) and 1 gave p-toluenesulfinylmorpholide (13).
THE CRYSTALLITE SIZE OF α-IRON IN THE PRESENCE OF K2O IN THE DOUBLY PROMOTED AMMONIA SYNTHESIS IRON CATALYSTS
Authors: Sasa Yoshihiko , Uda Masayuki , Toyoshima Isamu 
Published: July 2006

Abstract
Besides the effect of electronic factor of K2O in the doubly promoted ammonia synthesis iron catalysts, K2O shows an another function to control a crystallite size of α-iron which is formed by reduction of the catalysts with hydrogen.
HYDRIDING BEHAVIORS OF Zr(FexMn1−x)2 ALLOYS
Authors: Suzuki Akira , Nishimiya Nobuyuki , Ono Shuichiro 
Published: July 2006

Abstract
The hydriding behaviors and crystallographic characteristics of Zr(FexMn1−x)2 alloys, wherein x is 0 to 1, vary depending on the x value. On substituting Mn of ZrMn2 with Fe, the dissociation pressure of its hydride increases monotonously at temperatures around 400K.
SYNTHESIS OF (±)-SEMBURIN
Authors: Ohfune Yasufumi , Takaki Kazutoshi , Kameoka Hiromu , Sakai Tsutomu 
Published: July 2006

Abstract
Semburin, a new 2,8-dioxabicyclo[3,3,1]nonane skeleton, has been synthesized in the stereoselective manner from α-pyrone.
RUTHENIUM HYDRIDE-CATALYZED DOUBLE BOND MIGRATION OF 2,5-DIMETHOXY-2,5-DIHYDROFURANS. A NEW PROCESS FOR THE PREPARATION OF γ-KETOESTERS
Authors: Hirai Kenji , Suzuki Hiroharu , Kashiwagi Hiroshi , Moro-Oka Yoshihiko , Ikawa Tsuneo 
Published: July 2006

Abstract
γ-Ketoesters are obtained in excellent yields by means of double bond migration of 2,5-dimethoxy-2,5-dihydrofurans mediated by a ruthenium hydride complex, HRuCl(PPh3)3(C6H5CH3) or HRuCl(CO)(PPh3)3′ and subsequent hydrolysis in acidic media.