bluuebunny/crossref_metadata_2025 huggingface dataset:
DEHYDROIRIDODIAL, THE PUNGENT PRINCIPLE OF ACTINIDIA POLYGAMA MIQ.
Authors: Yoshihara Kazuo , Sakai Tsutomu , Sakan Takeo
Published: July 2006

A new monoterpene dial, dehydroiridodial, was isolated from the volatile oils of the fresh fruits and the fruit galls of Actinidia polygama Miq. as the pungent principle. The stereostructure of this dial was confirmed by conversion of (−)-(4S,8S)-p-menth-1-en-9-ol to this compound.
DEMETHYLATION OF 2,3-XYLIDINE TO m-TOLUIDINE
Authors: Matsumoto Tadashi , Tachibana Yakudo , Taniguchi Hiroaki
Published: July 2006

Hydrocracking of 2,3-xylidine to m-toluidine over various metal oxide-supported nickel catalysts was examined. m-Toluidine was obtained in 65.3% of selectivity at 52.6% of 2,3-xylidine conversion by using basic nickel-magnesia catalyst. Nickel catalysts supported on strongly acidic metal oxides caused considerable extents of side reactions.
ISOMERIZATION OF 1-BUTENE OVER SODIUM OXIDE AND POTASSIUM OXIDE
Authors: Noumi Hisayuki , Misumi Takatoshi , Tsuchiya Susumu
Published: July 2006

The isomerization of 1-butene took place over sodium oxide and potassium oxide; cis-2-butene and trans-2-butene are formed. The ratio, cis/trans, was dependent upon the reaction temperature, and became less than unity in the reaction over the potassium oxide higher than 380 K.
PHENYLBIS(ACETYLACETONATO)CHROMIUM(III). PREPARATION AND REACTIONS WITH ALDEHYDES AND KETONES
Authors: Maruyama Kazunori , Ito Takashi , Yamamoto Akio
Published: July 2006

Treatment of Cr(acac)3 with AlPh3·Et2O gave PhCr(acac)2, 1, which was characterized by IR spectrum, elemental analysis and some chemical reactions. Complex 1 reacted with aldehydes and ketones to afford phenylated alcohols and/or ketones, indicating the presence of the alkoxychromium intermediate as a result of an insertion of the carbonyl group into the Ph–Cr bond. The results were compared with the analogous reactions using the known complex, PhCrCl2(THF)3.
ACTIVE SPECIES FOR THE FORMATION OF ETHYLCHLORIDE FROM ETHANOL ON POLY(4-VINYLPYRIDINE)-CHLORANIL EDA COMPLEX STUDIED BY MEANS OF X-RAY PHOTOELECTRON SPECTROSCOPY
Authors: Akiba Etsuo , Naito Shuichi , Soma Mitsuyuki , Onishi Takaharu , Tamaru Kenzi
Published: July 2006

The effect of pretreatment on the reactivity of electron donor acceptor (EDA) complexes between poly(4-vinylpyridine) and chloranil was studied by means of X-ray photoelectron spectroscopy (XPS). The active species for the formation of ethylchloride from ethanol was revealed to be the negatively charged chlorine of chloranil in the EDA complex.
SELECTIVE ALLYLATIONS OF α,β-UNSATURATED ACETALS WITH ALLYLSILANES IN THE PRESENCE OF LEWIS ACID
Authors: Hosomi Akira , Endo Masahiko , Sakurai Hideki
Published: July 2006

The reaction of allylsilanes with α,β-unsaturated acetals in the presence of titanium tetrachloride afforded diallylated compounds, while monoallylated compounds were obtained selectively by the reaction promoted by aluminum trichloride or boron trifluoride–ether complex.
COLLOIDAL RHODIUM IN POLY(VINYLPYRROLIDONE) AS HYDROGENATION CATALYST FOR INTERNAL OLEFINS
Authors: Hirai Hidefumi , Nakao Yukimichi , Toshima Naoki
Published: July 2006

Refluxing of a methanol solution of rhodium(III) chloride and poly(vinylpyrrolidone) with sodium hydroxide gives a stable colloidal dispersion of rhodium particles of 8.8 Å in diameter. The colloidal dispersion exhibits a high catalytic activity for hydrogenation of internal olefins at 30°C under an atmospheric hydrogen pressure.
FLOCCULATION OF PHOSPHATIDYLCHOLINE VESICLE WITH TRIMETHYLAMMONIUM GLYCOL CHITOSAN IODIDE
Authors: Fujii Susumu , Kokufuta Etsuo , Furusawa Kunio
Published: July 2006

Phosphatidylcholine (PC) vesicle was quantitatively flocculated with trimethylammonium glycol chitosan iodide (MGCH) over the pH region of 3 – 12. The results obtained by IR analysis of the aggregate and by turbidity titration in the presence of metal cations, suggested that the flocculation would be based on the salt-linkage formation between phosphate group of PC and trimethylammonium group in MGCH.
ESR g-ANISOTROPY INVERSION OBSERVED FOR Cu(II)-CROWN ETHER COMPLEX IN SOLUTION
Authors: Ishizu Kazuhiko , Haruta Tokuhiro , Nakai Kazuhiro , Miyoshi Kiyonori , Sugiura Yukio
Published: July 2006

CuCl2 solubilized by Benzo-15-crown-5 in dry CHCl3 showed the anomalous g-anisotropy inversion (g|| <g⊥) in the ESR spectrum.

The spin Hamiltonian parameters determined were g||=1.995, g⊥=2.294 and |A|||=129.8×10−4 cm−1. Based on the ESR parameters, the bonding parameters of Cu(II) were calculated with application of the Swalen’s method. A weak bonding in the xy-plane of the paramagnetic site was assumed between the metal and the ligands, and a perturbation on the Cu(II) positive hole appears mainly due to the crystal field working along the z-axis, and the unpaired electron was suggested to occupy the dz2 orbital at the ground state.
THE REACTION OF 8,8-DISUBSTITUTED HEPTAFULVENES WITH AMINES IN THE PRESENCE OF COPPER(II) ACETATE
Authors: Kikuchi Katsuo , Maki Yuji , Nomata Eiko , Tada Kyoko
Published: July 2006

The reaction of 8,8-dicyanoheptafulvene (1a) with ammonia and several kinds of amines in the presence of copper(II) acetate afforded 1,2-dihydro-2-iminocyclohepta[b]pyrrole derivatives (2) and/or 3-aminoisoquinoline derivatives (3). The reaction of 8-cyano-8-methoxycarbonylheptafulvene (1b) and amines has also been described.
STRUCTUAL ELUCIDATION OF THE INCLUSION COMPLEXES OF TOLBUTAMIDE WITH α- AND β-CYCLODEXTRINS IN AQUEOUS SOLUTION
Authors: Uekama Kaneto , Hirayama Fumitoshi , Matsuo Naoki , Koinuma Hideomi
Published: July 2006

Inclusion complexation of tolbutamide (TBA) with α- and β-cyclodextrins (α-CyD, β-CyD) were studied by solubility measurement, carbon 13 nuclear magnetic resonance (13C NMR), and circular dichroism (CD) spectroscopies. The results of 13C spin-lattice relaxation times, 13C chemical shift changes, and induced CD spectra suggested that the orientation of TBA in α-CyD cavity is fundamentally different from that in β-CyD cavity in aqueous solution.
AN ENANTIOMER DIFFERENTIATING REACTION OF p-TOLYLSULFINYLCARBANION WITH (−)-MENTHYL CARBOXYLATES
Authors: Kunieda Norio , Motoki Hiroaki , Kinoshita Masayoshi
Published: July 2006

Treatment of (−)-menthyl carboxylates(2) with 2 equiv of p-tolylsulfinylcarbanion(1) afforded the corresponding optically active β-keto sulfoxides(3) together with optically active methyl p-tolyl sulfoxide. The enantiomeric purity and the predominant configuration of the products were discussed.
STUDIES ON THE SYNTHESES OF SESQUITERPENE LACTONES V. TOTAL SYNTHESIS OF ARBORESCIN
Authors: Ando Masayoshi , Akahane Atsushi , Takase Kahei
Published: July 2006

Arborescin has been synthesized in 11 steps from 3α,4α-epoxy-1,1-ethylenedioxy-5αH,6β,11βH-eudesman-6,13-olide. The key step involves solvolytic rearrangement of 3α-benzoyloxy-1β-mesyloxy-5αH,4β,6β,11βH-eudesman-6,13-olide. The stereochemistry of epoxide ring of arborescin has been determined to be β-orientation from this synthesis.
LIFETIME OF RHODAMINE B RADICAL CATION IN ACETONITRILE–WATER MIXED SOLVENTS
Authors: Watanabe Tadashi , Fujishima Akira , Honda Kenichi
Published: July 2006

The rotating ring-disk electrode (RRDE) technique was used to measure the lifetime (τ) of rhodamine B radical cation (RhB\underset.+) in acetonitrile–water mixed solvents. The result can best be represented by τ=0.75[H2O]−1 (s), indicating that the principal pathway in the decay of RhB\underset.+ is through a bimolecular reaction with H2O.
ON THE ACTIVE SPECIES IN THE REDUCED OR PARTIALLY REOXIDIZED RHENIUM OXIDE-ALUMINA CATALYST FOR THE METATHESIS OF PROPENE
Authors: Nakamura Ryuichi , Ichikawa Kazuto , Echigoya Etsuro
Published: July 2006

Novel methods for the activation of Re2O7–Al2O3 metathesis catalyst, the reduction of the catalyst with propene and the adsorption of oxygen on the reduced catalyst, provide highly active catalysts for the metathesis of propene at low temperatures near 50°C. The properties of the active sites were estimated by their kinetic behavier, EPR studies, etc.
FURTHER EXAMPLES OF TETRACYANOQUINODIMETHANOCYCLOPHANE
Authors: Yoshida Misaku , Tochiaki Yukio , Tatemitsu Hitoshi , Sakata Yoshiteru , Misumi Soichi
Published: July 2006

Three tetracyanoquinodimethanocyclophanes 2–4 were synthesized from the corresponding dimethyl cyclophanes. They show stronger charge transfer bands than TCNQ-paracyclophane 1 in the electronic spectra and no distinct difference in those of two isomeric TCNQ-naphthalenophanes 3 and 4.
REACTIONS OF ORGANOALUMINUMS WITH COPPER(II) HALIDES. A CONVENIENT ROUTE TO ALKYL HALIDES PROM OLEFINS VIA HYDROALUMINATION
Authors: Sato Fumie , Mori Yoshikuni , Sato Masao
Published: July 2006

The reaction of lithium tetraalkylaluminums with copper(ll) chloride or bromide gives the corresponding alkyl halides in good yield. The facile reaction offers a convenient method for the preparation of 1-haloalkanes or 1-haloalkenes from 1-alkenes or nonconjugated diolefins, respectively.
PHOTO-ASYMMETRIC SYNTHESIS OF HEXAHELICENE IN CHOLESTERIC LIQUID CRYSTALS
Authors: Nakazaki Masao , Yamamoto Koji , Fujiwara Kazufumi
Published: July 2006

Irradiation of 2-styrylbenzo[c]phenanthrene (1) in cholesteric liquid crystals yielded optically active hexahelicene (2) with optical yields around 1%.
ASYMMETRIC OXIDATION REACTION OF THERMALLY DECOMPOSED PRODUCTS OF meso-1,1′-DIPHENYL-1,1′-AZODIETHANE
Authors: Yoshino Kenji , Ohkatsu Yasukazu , Tsuruta Teiji
Published: July 2006

meso-1,1′-Diphenyl-1,1′-azodiethane was thermally decomposed in the presence of the cobalt complex having an asymmetric ligand in benzene at 102°C in vacuo. The resulting reaction mixture reacted readily with oxygen to form products such as acetophenone and l-phenylethanol, the latter being optically active.
COPE REARRANGEMENTS OF CYCLIC 1,5-DIENES POSSESSING A NORBORNENONE MOIETY
Authors: Yamashita Yoshiro , Mukai Toshio
Published: July 2006

Cope rearrangements of tricyclo-dienones 2 and 4 containing a norbornenone moiety have been investigated to synthesize isomeric α, β-unsaturated ketones 3 and 5. The facility of the Cope rearrangement depends on the structure of 2 and 4. It was found that dienones 2b, 2e, and 4b underwent the rearrangement, but not the similar compounds, 2c, 2d, and 4c.
SYNTHESIS AND PROPERTIES OF A SPIN LABELED SODIUM DODECYL SULFATE
Authors: Yamaguchi Takeo , Yamauchi Akira , Kimizuka Hideo
Published: July 2006

A nitroxide spin labeled surfactant, N-oxyl-4′,4′-dimethyloxazolidine derivative of sodium 10-oxododecyl sulfate, was synthesized from decanedioic acid. The ESR spectrum of the compound showed a typical pattern for nitroxide radical and the critical micelle concentration was 21.6 mmol/kg at 25.0 ± 0.1 °C.
REACTIONS USING MICELLAR SYSTEM: PHOTOCYCLOADDITIONS OF ACENAPHTHYLENE WITH ACRYLONITRILE AND METHYL ACRYLATE
Authors: Nakamura Yushin , Imakura Yasuhiro , Morita Yutaka
Published: July 2006

Photochemical crossed-cycloaddition reaction of acenaphthylene with acrylonitrile in micelle of nonionic surfactant was more effective than in benzene to give better yield of the addition products, especially by adding 1,3,5-heptatriene as quencher. Similarly, acenaphthylene with methyl acrylate in micellar system gave also good yield of the addition products.
KINETIC STUDY OF PENETRATION OF AN ANIONIC DYE INTO SURFACTANT MICELLES
Authors: Miyashita Yuuji , Hayano Shigeo
Published: July 2006

The rate of penetration of an anionic dye into micelles, of hexadecyl trimethyl ammonium bromide(HTAB), was measured by the stopped-flow method using the specific absorption band. The rate constants, k’s, were determined to be 0.34–0.37 sec−1 at 30°C. The kinetic effect of the halide ions on the penetration was discussed.
A ONE-STEP AND CONVENIENT SYNTHESIS OF α-CHLORO-γ-BUTYROLACTONES, PRECURSORS OF Δα,β-BUTENOLIDES AND α-METHYLENE γ-BUTYROLACTONES
Authors: Matsumoto Hideyuki , Ohkawa Kazuhiro , Ikemori Shigeru , Nakano Taichi , Nagai Yoichiro
Published: July 2006

α-Chloro-γ-butyrolactones were prepared in high yields from a a variety of olefins which were allowed to react with trimethylsilyl α-chlorocarboxylates in the presence of dichlorotris(triphenylsphosphine) ruthenium(II).
ISOMERIZATION OF α-PlNENE OXIDE OVER SOLID ACIDS AND BASES
Authors: Arata Kazushi , Tanabe Kozo
Published: July 2006

α-Pinene oxide was isomerized preferentially to aldehydes with five-membered ring over SiO2–Al2O3, SiO2–TiO2, solid H3PO4 and FeSO4, their selectivities being more than 84%, while TiO2 and ZrO2 gave predominantly allyl alcohol (transpinocarveol) in 80–91% selectivity.
FORMATION OF DIAZOOLEFINS IN THE REACTION OF 4-DIAZOINDENO[2,3-c]1,2,5-THIADIAZOLES WITH ACETYLENECARBOXYLATES WITHOUT LIGHT
Authors: Mataka Shuntaro , Takahashi Kazufumi , Tashiro Masashi
Published: July 2006

The reaction of 4-diazoindeno[2,3-c]1,2,5-thiadiazoles (1) with acetylenecarboxylates (2) afforded diazoalkenes (3) in high yields without light.
THERMOLYSIS OF ACETYLENECOBALT COMPLEXES: A NOVEL ROUTE TO BISCARBYNE COMPLEXES, (μ3η1-CR1) (μ3η1-CR2) [(η5-C5H5)Co]3
Authors: Yamazaki Hiroshi , Wakatsuki Yasuo , Aoki Katsuyuki
Published: July 2006

Thermolysis of (η2-disubstituted acetylene)(η5-cyclopentadienyl)(triphenylphosphine) cobalt appeared to be a novel route to biscarbyne complexes (μ3η1-CR1)(μ3η1-CR2)[(η5-C5H5)Co]3, one of which (R1=Me,R2=CO2Me) was crystallographically analyzed. As an exception, thermolysis of dimethyl acetylenedicarboxylate-cobalt complex gave a novel olefin complex, (η5-C5H5)[CoP(Ph2)C6H4C(CO2Me)=CH(CO2Me)].
CATALYTIC HYDROBORATION OF OLEFINS BY USE OF TITANIUM COMPLEX AS CATALYST
Authors: Isagawa Kakuzo , Sano Hiroshi , Hattori Minoru , Otsuji Yoshio
Published: July 2006

The reagent system generated from Cp2TiCl2 and LiBH4 promotes the catalytic hydroboration of olefins with LiBH4 to give lithium alkylborohydrides which can be converted into alcohols by treating with sodium methoxide and H2O2.
REARRANGEMENT DES PHENYL-3 DIVINYL-1,2 AZIRIDINES
Authors: Attia Mohamed , Gelas-Mialhe Yvonne , Vessiere Roger
Published: July 2006

L’addition des phényl-3 vinyl-2 aziridines 1 et 2 au propiolate d’éthyle conduit très vraisemblablement aux phényl-3 divinyl-1,2 aziridines. Ces composés ne sont cependant pas isolés en raison de leur réarrangement en dérivés du dihydro-1,4 naphtalène.
PHOTOCHEMICAL REACTION OF 1,2-NAPHTHOQUINONE WITH ARYLACETALDEHYDES. PRODUCTS AND THEIR INTRAMOLECULAR ISOMERIZATION
Authors: Maruyama Kazuhiro , Takuwa Akio , Soga Osamu
Published: July 2006

Photochemical reaction of 1,2-naphthoquinone with phenylacetaldehyde in benzene afforded 5, 6, and 7. The products, 5, and 6, are combination products of 1,2-naphthosemiquinone radical with phenylacetyl radical, and the product 7 with benzyl radical. However, the reaction with diphenylacetaldehyde gave only 11 without accomanying any other expected acylation product. 4-Alkyl-1,2-naphthalenediols, 7 and 11, were very sensitive to air and oxidized to quinones, 9 and 14. The quinones isomerized intramolecularly to quinone methides, 10 and 15, on silica gel during separating procedures.
ESR AND OPTICAL STUDY OF SPIN-LABELED ACRIDINE DYE-DNA COMPLEXES: LOCAL ENVIRONMENT OF THE DYE-DNA BINDING SITE
Authors: Yamaoka Kiwamu , Noji Sumihare
Published: July 2006

Interactions of five spin-labeled acridine dyes with DNA were studied by the ESR and optical methods. The binding of the dye chromophore to DNA was evident from the change of absorption and the appearance of extrinsic circular dichroism. The radical moiety was found to rotate anisotropically regardless of the labeled positions.
FLUORESCENCE NATURE OF PROTONATED 1,N6-ETHENOADENOSINE AND RELATED QUATERNIZED DERIVATIVES AT 293 AND 77°K
Authors: Kuramochi Takao , Inoue Yasuo , Imakubo Keiichi
Published: July 2006

Fluorescence properties of 1,N6-ethenoadenosine(εAdo) at neutral and acidic pH’s and its quaternized derivatives, 1-methyl- and 9-methyl-3-β-d-ribofuranosylimidazo[2,1-i]purinium cations(abbreviated as m1εAdo+ and m9εAdo+, respectively) have been examined at 293 and 77°K. We have found that m1εAdo+ and m9εAdo+ are both highly fluorescent at 293 and 77°K.
STEREOSPECIFIC SYNTHESIS OF CIS-DIHALOVINYLCYCLOPROPANECARBOXYLIC ACID
Authors: Kondo Kiyosi , Takashima Toshiyuki , Tunemoto Daiei
Published: July 2006

Intramolecular cycloaddition of the carbenoid derived from diazoacetate 4 gave the bicyclic lactone 1. Conversion of the lactone 1 to stereochemically pure cis-dihalovinylcyclopropanecarboxylic acids 7 was achieved by reduction with zinc and acetic acid.
PERCHLORATE, TETRAFLUOROBORATE, AND HEXAFLUOROPHOSPHATE AS BRIDGING AND UNIDENTATE LIGANDS IN SOME PALLADIUM(II) COMPLEXES
Authors: Isobe Kiyoshi , Nanjo Kazuharu , Nakamura Yukio , Kawaguchi Shinichi
Published: July 2006

Dinuclear complexes [PdX(R)(PPh3)]2 (R = 2-(6-chloropyridyl)) containing ClO4−, BF4−, and PF6− as bridging ligands (X) have been prepared and characterized. Reactions with pyridine convert these anions into the unidentate ligands, giving rise to the [PdX(R)(py)(PPh3)] complexes which are more stable than the corresponding salts [Pd(R)(py)2(PPh3)]X.
TAUTOMERISM IN SCHIFF BASES DERIVED FROM SUBSTITUTED 2- AMINO PYRIDINES AND 2-HYDROXY 1-NAPHTHALDEHYDE-1H NMR EVIDENCE FOR TAUTOMERISM AND CONJUGATION
Authors: Ranganathan Hemalatha , Ramaswamy D , Ramasami T , Santappa M
Published: July 2006

Data showing the direct influence of substituents in the pyridine ring on the electron density at the azomethine function in 2- aminopyridine derivatives and their contrasting behaviour as compared to the aniline analogoues are presented. Results point out tautomeric equilibration and extended conjugation in title compounds.
PHOTOREACTIONS OF KETONES IN STRONG ACID MEDIA. A NOVEL TYPE REARRANGEMENT IN CYCLIC β-DICARBONYL SYSTEM
Authors: Sato Tadashi , Nagumo Katsuyuki , Saito Kimitoshi , Ohyama Toshiyuki , Nakane Ryohei
Published: July 2006

Cyclic β-dicarbonyl compounds 1a, 1b, 10a and 10b undergo isomerization involving reconstruction of the ring system by the UV-irradiation in strong acid media. It is suggested that the isomerization is aided by the formation of stabilized cation after the ring opening.
SYNTHESIS AND SUPERSTRUCTURE OF La2⁄3(Mg1⁄2W1⁄2)O3
Authors: Torii Yasuyoshi
Published: July 2006

A new perovskite La2⁄3(Mg1⁄2W1⁄2)O3 having an orthorhombic multiple-cell was synthesized. The lattice constants were a=7.8157(5) Å, b=7.8344(6) Å and c=2×7.9067(6) Å. The superstructure was found to be due to a NaCl-type ordering of B ions as well as an ordering of A-site vacancies.
Pd(II)–Cu(II)-CATALYZED SYNTHESIS OF MONO- AND DIALKENYL-SUBSTITUTED FIVE-MEMBERED AROMATIC HETEROCYCLES
Authors: Maruyama Osamu , Yoshidomi Michiaki , Fujiwara Yuzo , Taniguchi Hiroshi
Published: July 2006

The Pd-catalyzed one-step alkenylation method of five-membered aromatic heterocycles such as furan or thiophene with olefins has been found. The reaction proceeds regioselectively occurring at the 2-position of the heterocycles and the products have trans-stereochemistry when the substituents on the olefin is bulky.
NEW STEREOSPECIFIC SYNTHESIS OF VINYL SULFIDES VIA CIS–TRANS OLEFIN INVERSION
Authors: Masaki Yukio , Sakuma Kazuhiko , Kaji Kenji
Published: July 2006

A new stereospecific synthesis of vinyl sulfides (4) was achieved via complete cis–trans olefin inversion in which benzenesulfenyl chloride addition to olefins (1) and trans elimination of hydrogen chloride are involved.
DUAL MECHANISMS OF THE ARYL GROUP ROTATION IN 9-(3,5-DIMETHYLBENZYL)TRIPTYCENE DERIVATIVES
Authors: Yamamoto Gaku , Oki Michinori
Published: July 2006

9-(3,5-Dimethylbenzyl)triptycene derivatives exchange their two m-methyl groups by two mechanisms: rotation about the CH2–Ar bond and synchronous rotation about the CH2–Ar and the CH2–C9 bonds. The relative contribution of the processes is dependent on the peri-substituents.
AN ONE-POT SYNTHESIS OF 3-ALKYLINDOLES FROM o-TOLYL ISOCYANIDES
Authors: Ito Yoshihiko , Kobayashi Kazuhiro , Seko Norihiko , Saegusa Takeo
Published: July 2006

Indolyllithium arising from ring-closure of o-lithiomethylphenyl isocyanide, which is generated in situ by the reaction of o-tolyl isocyanide with lithium diisopropylamide in diglyme at −78°C, is treated with anhydrous MgI2 prior to alkylations with alkyl halides to give 3-alkylindoles selectively in moderate to excellent yields. The reaction provides a convenient method for synthesis of 3-alkylindoles starting with o-tolyl isocyanide.
EVIDENCE FOR THE PHOTOLYTIC REACTION PATHWAY OF 3-PHENYL-2(3H)-OXEPINONES. SYNTHESIS, REACTION, AND ISOLATION OF 7-PHENYL-2(7H)-OXEPINONES
Authors: Hoshi Nobuto , Hagiwara Hisahiro , Uda Hisashi
Published: July 2006

7-Phenyl-2(7H)-oxepinones are shown to be the initial photoproducts of 3-phenyl-2(3H)-oxepinones by the synthesis and reaction, and finally by the success of the actual isolation of the 3-methyl derivative from photolysis.
ACETOXYSELENATION: REACTION OF OLEFINS WITH DIPHENYL DISELENIDE AND CUPRIC ACETATE
Authors: Miyoshi Noritaka , Ohno Yutaka , Kondo Kiyoshi , Murai Shinji , Sonoda Noboru
Published: July 2006

In the presence of cupric acetate, diphenyl diselenide was found to react with olefins in acetic acid to afford 2-acetoxyalkyl phenyl selenide (1). The similar reaction proceeded by use of a catalytic amount of cupric acetate in the presence of oxygen. Formation of benzeneselenenyl acetate(PhSeOAc) as an intermediate is suggested.
MAGNESIUM OXIDE AS AN EFFECTIVE CATALYST FOR MIGRATION OF EXO-CYCLIC DOUBLE BOND
Authors: Hattori Hideshi , Tanabe Kozo , Hayano Kiyoharu , Shirahama Haruhisa , Matsumoto Takeshi
Published: July 2006

Exo-double bonds of 2-methylene-4,4,6-trimethylbicyclo[4,2,0]octane (1), Δ7(13)-protoilludene (3), Δ2(3),7(13)-illudadiene (5), and Δ2(10)-pinene (7) were effectively migrated to the endo positions over MgO catalyst.
RAMAN SCATTERING STUDY ON COORDINATION SITE OF IMIDAZOLE GROUP IN ITS METAL COMPLEX
Authors: Itabashi Masao , Itoh Koichi
Published: July 2006

Raman spectra of cobalt(II)-(4-methylimidazole) and nickel(II)-(l-histidine) complexes were analyzed and it was found that the C=C stretching, breathing, and C-H in-plane bending vibrations of the imidazole group clearly reflect the coordination site, the N(1) atom or the N(3) atom, of this group to the central metal ion.
ELECTRICAL CONDUCTIVITY OF LITHIUM BORATE GLASSES
Authors: Takahashi Takehiko , Yamamoto Osamu
Published: July 2006

The electrical conductivity of the lithium borate glass systems, LiCl–Li2O–Al2O3-B2O3, has been measured as a function of composition and temperature. The lithium ion conductivity increases with increasing and Li2O and LiCl contents. The highest conductivity of 7×10−3(Ω·cm)−1 was obtained at 300°C.
SYNTHESIS OF DIHYDRO-1,3-OXAZINES FROM THIOAMIDES
Authors: Harada Toshiro , Tamaru Yoshinao , Yoshida Zen-ichi
Published: July 2006

A new method converting thioamides to the synthetically useful precursor, 2-substituted dihydro-1,3-oxazine, is described, in which the corresponding S-methyl thiouronium salts are refluxed with 4-amino-4-methyl-2-pentanol in tBuOH or CH2Cl2 to give the products in high yields.
SYNTHESES OF (±)-CONFERTIFOLIN AND (±)-ISODRIMENIN
Authors: Akita Hiroyuki , Naito Takanobu , Oishi Takeshi
Published: July 2006

A large scale synthesis of (±)-confertifolin and (±)-isodrimenin was achieved starting from β-ionone via the tricyclic furan derivative. Oxidation of this common intermediate with Pb(OAc)4 followed by pyrolysis afforded the former as a main product. The latter was prepared as a main product by NaBH4 reduction of (±)-winterin derived from the same intermediate.
ENANTIOTOPICALLY SELECTIVE OXIDATION OF 1,3-DIOLS WITH A MICROORGANISM
Authors: Ohta Hiromichi , Tetsukawa Hatsuki
Published: July 2006

Microbial oxidation of 2-methylpropane-1,3-diol (1a) proceeded with distinction of pro-(R) and pro-(S) hydroxymethyl groups resulting in the formation of β-hydroxyisobutyric acid (2a) of high optical purity. 2-Ethyl and 2-isopropyl derivatives (1b, c) were also oxidized to give the corresponding hydroxy acids (2b, c), but the optical yields were low.
LINE SHAPE BEHAVIOR OF THE RESONANCE CARS IN Zn-TETRAPHENYLPORPHIN
Authors: Adachi Yukio , Igarashi Ryosaku , Maeda Shiro
Published: July 2006

CARS of fluorescent Zn-tetraphenylporphin has been measured by ω1 radiations in resonance with the first allowed transition near 600nm. An appreciably resonant line was observed at 1360cm−1 and the line shape changed remarkably by moving ω1 within the absorbing region. The line shape behavior has been reasonably interpreted by picking out a doubly resonant term in the susceptibility expression, in which ω1 and ω3 are resonant with the 0–0 and 0–1 transitions respectively.
ISOLATION OF 5-OXA-, 5-THIA-, AND 5-TOSYLAZA-2,8-DI-t-BUTYL-4,6,10,11-TETRAPHENYLTRICYCLO[7.2.0.03,7]UNDECA-1,3,6,8,10-PENTAENES, THEIR HClO4 SALTS, AND 4-SELENA-2,8-DI-t-BUTYL-5,6,10,11-TETRAPHMYLTRICYCLO[7.2.0.03,7]UNDECA-1,3(7),5,8,10-PENTAENE: NEW ANTIAROMATIC SYSTEMS
Authors: Toda Fumio , Tanaka Koichi
Published: July 2006

The title new antiaromatic compounds were prepared by unusual insertion reactions of O, S, N, and Se to 2,7-di-t-butyl-4,5,9,10-tetraphenyltricyclo[6.2.0.03,6]deca-1,3(6),4,7,9-pentaene.
FOUR NEW GERMACRANOLIDES FROM EUPATORIUM LINDLEYANUM DC.
Authors: Ito Kazuo , Sakakibara Yoshihisa , Haruna Mitsumasa , Lee Kuo-Hsiung
Published: July 2006

Four new sesquiterpene lactones, eupalinin-A, -B, -C, and -D, the first of which showed significant inhibitory activity against KB cell culture, were isolated from Eupatorium lindleyanum DC. and their structures were determined by a combination of chemical and physical techniques.
THE REACTION OF π-ALLYLNICKEL HALIDES WITH 2-PYRIDYL CARBOXYLATES A NEW SYNTHESIS OF β,γ-UNSATURATED KETONES
Authors: Onaka Makoto , Goto Toshio , Mukaiyama Teruaki
Published: July 2006

Various π-allylnickel halides were found to react with 2-pyridyl carboxylates to give β,γ-unsaturated ketones chemospecifically in good yields.
THERMAL REARRANGEMENT OF THE BRIDGING ETHYLENEDIAMINE LIGAND TO A CHELATING ONE ACCOMPANIED WITH THE LIBERATION OF THE GUEST MOLECULES FROM AN en-Td TYPE Cd(en)Cd(CN)4·2C6H6 CLATHRATE
Authors: Nishikiori Shin-ichi , Iwamoto Toschitake , Yoshino Yukichi
Published: July 2006

The en ligand bridging a pair of Cd atoms in the host structure of an en-Td type Cd(en)Cd(CN)4·2C6H6 clathrate was concluded to turn to a chelating ligand in the residual host metal complex Cd(en)Cd(CN)4 left after releasing the guest molecules in vacuo at 100°C from the structural analysis of the Cd(en)Cd(CN)4 crystal independently grown up from an aqueous solution.
PHOTO-OXIDATIVE DEGRADATION OF N-SUBSTITUTED ALDIMINES
Authors: Mehrotra K N , Pandey G P
Published: July 2006

Photo-oxidation of several N-substituted aldimines (1) gave carboxylic acids, N-diarylmethyl benzamides (2), ketones and benzamides; compound 2 was a precursor for ketone and amide. A tentative mechanistic route for the formation of products has been suggested.
DIELS–ALDER REACTION OF 3-METHOXYCARBONYLMETHYLENE-2-OXOINDOLINE DERIVATIVES WITH UNSYMMETRICAL BUTADIENES
Authors: Okada Kunisuke , Sakuma Hiroteru , Kondo Morihide , Inoue Shoji
Published: July 2006

Diels–Alder reaction of 3-methoxycarbonylmethylene-2-oxoindoline derivatives (1a and 1b) with unsymmetrical butadienes (1,3-pentadiene and 1-acetoxy-1,3-butadiene) gave two stereoisomeric adducts (11) as the respective reaction products in high yields.
MOLECULAR STRUCTURE AND CONFORMATION OF 1,2-DIMETHYLHYDRAZINE STUDIED BY GAS ELECTRON DIFFRACTION
Authors: Kohata Kunio , Fukuyama Tsutomu , Kuchitsu Kozo
Published: July 2006

An electron diffraction study has shown that the inner–outer conformer of 1,2-dimethylhydrazine, the C–N–N–C dihedral angle being estimated to be about 90°, is a major conformer in the gas phase. Another conformer is found to have a smaller dihedral angle (inner–inner form). The thermal-average bond distances and angles of the inner–outer conformer have been determined.
SYNTHESES OF SYN- AND ANTI-[3.3](1,4)NAPHTHALENOPHANE AND INTRAMOLECULAR CYCLOADDITION PRODUCTS OF SYN- AND ANTI-[3.3](1,4)NAPHTHALENOPHANE DERIVATIVES
Authors: Kawabata Takeo , Shinmyozu Teruo , Inazu Takahiko , Yoshino Tamotsu
Published: July 2006

Two isomeric [3.3](1,4)naphthalenophanes, syn and anti (8 and 9), were synthesized. The absorption maxima 237 and 330 nm for 8, as well as 231, 241, and 325 nm for 9 may be ascribed to the transannular π-electronic interaction between two naphthalene moieties. On irradiation, syn- and anti-[3.3](1,4)naphthalenophane derivatives were transformed to the photoisomers (10 and 11) which were reconverted to the original compounds (2 and 3) when heated in the solid phase at 175°C.
A TRIAL MONTE CARLO TRAJECTORY CALCULATION OF THE RATE CONSTANTS FOR THE REACTIONS H2+I AND H2+I2
Authors: Minami Ryuichi , Fueno Takayuki
Published: July 2006

A thermal rate constant k(T) is computed by the conditional Monte Carlo trajectory method. Characteristic of this method is that it reduces the trajectory data directly to k(T) without explicit calculation of the cross sections. Reaction systems H2+I → HI+H and H2+I2→ 2HI are studied as examples.
REACTION OF 2-PHENYL-5-TRIMETHYLSILOXYOXAZOLE WITH CARBONYL COMPOUNDS OR ACETALS: SYNTHESIS OF α,β-DEHYDRO-α-AMINO ACID DERIVATIVES
Authors: Takagaki Hidetsugu , Tanabe Shingo , Asaoka Morio , Takei Hisashi
Published: July 2006

Various N-benzoyl-α,β-dehydro-α-amino acids were synthesized in high yields by the reaction of 2-phenyl-5-trimethylsiloxyoxazole with aldehydes or acetals in the presence of tin(IV) chloride.
PHASE TRANSITION OF (NH4)2PdCl4 STUDIED BY NUCLEAR MAGNETIC RESONANCE
Authors: Asai Takeshi , Kiriyama Hideko
Published: July 2006

The phase transition of (NH4)2PdCl4 was confirmed at 132 K by the proton T1. A thermal hysteresis in T1 was observed, indicating that the transition is of a first-order. The transition is probably accompanied by the order–disorder change of an ammonium ion, but this is not effective for the transition temperature.
AN EFFICIENT GLUCOSYLATION OF ALCOHOL USING 1-THIOGLUCOSIDE DERIVATIVE
Authors: Mukaiyama Teruaki , Nakatsuka Takashi , Shoda Shin-ichiro
Published: July 2006

Glucosides and disaccharides were prepared in good yields from 2-benzothiazolyl 2,3,4,6-tetra-O-benzyl-1-thio-d-glucopyranoside and alcohols including sterically hindered secondary alcohols in the presence of cupric triflate. α-Glucosides were obtained predominantly by this method.
PROTON NMR STUDY ON THE LONG RANGE ORDERED ORGANIC FREE RADICAL, TRIPHENYL VERDAZYL
Authors: Yamauchi Jun , Deguchi Yasuo , Azuma Nagao
Published: July 2006

Proton NMR measurement in the magnetically long range ordered state of the polycrystalline organic free radical, triphenyl verdazyl, has been observed. The results give a microscopic evidence of long range order with the Néel temperature, 1.76 K.
REACTION OF CARBON DIOXIDE WITH ETHYLENE OXIDE IN THE PRESENCE OF ORGANOTIN COMPOUNDS
Authors: Matsuda Haruo , Ninagawa Akira , Nomura Ryoki , Tsuchida Tetsuo
Published: July 2006

The reaction of carbon dioxide (CO2) with ethylene oxide (EO) in the presence of organotin compounds, such as organotin halides (RnSnX4−n; R=Alkyl, Aryl, X=Br, Cl, n=2,1) or organostannoic acids ((RSnOOH)n; R=Alkyl, Aryl) yielded ethylene carbonate (EC) as a product in fairly good yields at 120°C.
INTRAMOLECULAR FLUORESCENCE QUENCHING AND PHOTOLYSIS OF 1-NAPHTHYLACETIC ACID DERIVATIVES
Authors: Tamaki Takashi
Published: July 2006

Intramolecular fluorescence quenching of 1-naphthylacetic acid derivatives has been interpreted in terms of electron transfer from the excited state of the naphthyl ring to the acyl group. Remarkable fluorescence quenching of the acyl chloride is attributable to successive deactivation of the excitation energy through the photocleavage of the C–Cl bond.
BIOSYNTHESIS OF ASPULVINONES. AROMATIC HYDROXYLATION META TO A PREEXISTING HYDROXYL GROUP
Authors: Kobayashi Masaki , Ojima Nobutoshi , Ogura Kyozo , Seto Shuichi
Published: July 2006

Shikimic acid, phenylalanine, and tyrosine are all incorporated into aspulvinones in Aspergillus terreus. The hydroxylation at C-4 involves the NIH shift, whereas C-2 is hydroxylated with loss of tritium from that position.
CONVERSION OF 3-ALKYLINDOLE TO 3-ALKYL-2-AMINO-3H-INDOL-3-OL VIA ALKYL 2-FORMAMIDOPHENYL KETONE
Authors: Sakiyama Fumio , Nakazawa Takashi
Published: July 2006

A new method for conversion of 3-alkylindoles to 3-alkyl-2-amino-3H-indol-3-ols is described. In this reaction, the indole nucleus was first oxidized with ozone to alkyl 2-formamidophenyl ketone, which was subsequently subjected to the reaction with cyanide ion in weakly alkaline medium to cyclize to the 3H-indole ring. The overall yield of the reaction was approximately 75 %. By this method an ionizable amidine function was introduced at the side chain of tryptophan.
NEW BIS(CROWN ETHER)S DERIVED FROM STEREOISOMERS OF DICARBOXYLIC ACID
Authors: Kimura Keiichi , Tamura Hiroshi , Tsuchida Tetsuo , Shono Toshiyuki
Published: July 2006

Stereoisomers of bis(crown ether)s were synthesized from meso- or dl-α,α′-dimethylglutaric acid and maleic or fumaric acid. Preliminary solvent extraction data suggested that the maleate derivative(cis form) differs considerably in the cation-complexing ability from the fumarate derivative(trans form), while two isomers of α,α′-dimethylglutarate derivatives are almost the same.
SOME CONSIDERATIONS ON THE RAMAN BANDS OF O-ALKYL XANTHOGENATES IN THE 700–600 CM−1 REGION
Authors: Sato Soei , Higuchi Seiichiro , Tanaka Shigeyuki
Published: July 2006

The Raman spectra of 11 kinds of O-alkyl xanthogenates in solutions and solid states were measured. The band patterns in the 700–600 cm−1 were examined in terms of the difference of phases, the behaviours on the change of solvents, and the intensities. From the results, origin of the characteristic band patterns was discussed.
KINETIC STUDY ON ANIONIC σ-COMPLEX FORMATION BETWEEN 2,4,6-TRINITROANISOLE AND METHOXIDE ION BY HIGH PRESSURE STOPPED-FLOW METHOD
Authors: Takisawa Noboru , Sasaki Muneo , Amita Fujitsugu , Osugi Jiro
Published: July 2006

The high pressure stopped-flow apparatus has been developed which enables to follow reaction rates three seconds after mixing up to 1500 bar. The activation volume at 25°C for the Meisenheimer complex formation between 2,4,6-trinitroanisole and methoxide ion in methanol was determined to be −7.2±0.8 cm3mol−1.
exo-STEREOSELECTIVITY IN ELECTROPHILIC REACTION TO 9-METHOXYCARBONYLBICYCLO[4.3.1]DECATETRAENTL ANION
Authors: Takahashi Kazuko , Kagawa Takashi , Takase Kahei
Published: July 2006

9-Methoxycarbonylbicyclo[4.3.1]decatetraenyl anion (6) has been prepared and its reaction with electrophiles has been studied. Contrary to the Radlick and Rosen’s explanation on bicyclo[4.3.1] decatetraenyl anion (2), 6 show a high exo (cis to the methylene bridge)-selection on quenching with acids and on the reaction with alkyl halides.
REACTIONS OF CARBON DIOXIDE WITH PALLADIUM COMPLEXES. SYNTHESIS AND CHARACTERIZATION OF CARBAMATO COMPLEXES OF PALLADIUM(II)
Authors: Ozawa Fumiyuki , Ito Takashi , Yamamoto Akio
Published: July 2006

A variety of new carbamatopalladium complexes, [PdMe(O2CNRR′)L2] (L = tertiary phosphine; R,R′ = H, alkyl, and phenyl), were prepared by direct reactions of dimethylpalladium complexes, [PdMe2L2], with carbon dioxide in the presence of amines. These complexes were characterized by means of elemental analysis, IR and 1H-NMR spectroscopy and chemical reactions. A new μ-carbonatopalladium complex, [Pd2Me2(μ-CO3)(PPh3)3], was prepared by heating the toluene solution of [PdMe(O2CNH2)(PPh3)2].
METHYL 3-LITHIO-2-METHYL-3-PHENYLTHIO-2-PROPENOATE AS A ZWITTERIONIC THREE-CARBON ADDEND; REACTIONS WITH CARBONYL COMPOUNDS
Authors: Isobe Kôhei , Fuse Masaaki , Kosugi Hiroshi , Hagiwara Hisahiro , Uda Hisashi
Published: July 2006

With α,β-enoates and aldehydes, methyl 3-lithio-2-methyl-3-phenylthio-2-propenoate undergoes addition and cyclization yielding functionalized cyclopentenones and butenolides, respectively. Reaction with acyl chlorides gives γ-keto-α,β-enoates.
A COMMENT ON THE MULLIKEN POPULATION ANALYSIS OF CHARGE DISTRIBUTION: THE CASE OF [Co(CN)6]3−
Authors: Sano Mitsuru , Hatano Yasuyo , Yamatera Hideo
Published: July 2006

Ab initio mo calculations on different basis sets gave [Co(CN)6]3− states with nearly identical energies but with different charge distributions; they were proved to represent the same state. This shows that charge distributions estimated on the Mulliken analysis must not be taken too literally.
CATALYSIS OF RHODIUM CLUSTERS. P–C BOND CLEAVAGE REACTION OF TRIPHENYLPHOSPHINE
Authors: Kaneda Kiyotomi , Sano Kotaro , Teranishi Shiichiro
Published: July 2006

Rh4(CO)12, Rh6(CO)16, and Rh12(CO)302− cluster complexes catalyze the P–C bond cleavage reaction of triphenylphosphine to give benzaldehyde and benzyl alcohol. Formaldehyde is necessary for attaining high yield of benzaldehyde.
ISOLATION OF 2-(3,7,11-TRIMETHYL-2,6,10-DODECATRIENYL)HYDROQUINONE FROM THE BROWN SEAWEED DICTIOPTERIS UNDULATA
Authors: Ochi Masamitsu , Kotsuki Hiyoshizo , Inoue Satoko , Taniguchi Makoto , Tokoroyama Takashi
Published: July 2006

2-(3,7,11-Trimethyl-2,6,10-dodecatrienyl)hydroquinone, a new substance of biogenetic interest, has been isolated from the brown seaweed D. undulata. Antimicrobial activity has been tested.
CONVERSION OF METHANOL INTO OLEFIN-RICH GASEOUS HYDROCARBONS OVER SUPPORTED ALUMINUM DIHYDROGENPHOSPHATE CATALYST
Authors: Kikkawa Shoichi , Shimizu Yasumi , Higuchi Susumu
Published: July 2006

Supported aluminum dihydrogenphosphate serves as an excellent catalyst for the decomposition of methanol to give olefin-rich gaseous hydrocarbons with depression of the formation of methane, carbon monoxide, and carbon dioxide.
DETERMINATION OF MERCURY BY DIRECT HEATING OF MERCURY-ADSORBED ION-EXCHANGE RESIN IN ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY
Authors: Nakano Kunio , Takada Takeo , Fujita Kazushi
Published: July 2006

A new method has been devised for the determination of mercury in electrothermal atomic absorption spectrometry. The mercury-adsorbed ion-exchange resin was heated in a carbon furnace, and the absorption peak of mercury appeared in the “drying” period without interference from the peak of the resin. This method made it possible to determine 0.04ppm of mercury.
SYNTHESIS OF ALKYL PHENYL SELENIDES BY THE REACTION OF PHENYL TRIMETHYLSILYL SELENIDE WITH ACETATES AND LACTONES
Authors: Miyoshi Noritaka , Ishii Hideo , Murai Shinji , Sonoda Noboru
Published: July 2006

The reaction of phenyl trimethylsilyl selenide with acetates and lactones using zinc iodide gave alkyl phenyl selenides and ω-phenylselenenylcarboxylic acids respectively.
ELECTRICAL CONDUCTIVITY OF SOLID STATE PROTEINS: SIMPLE PROTEINS AND CYTOCHROME c3 AS ANHYDROUS FILM
Authors: Nakahara Yusuke , Kimura Keisaku , Inokuchi Hiroo , Yagi Tatsuhiko
Published: July 2006

The difference in electrical resistivity between hemoproteins and simple proteins was reported. The resistivities of mono-hemoproteins were in the range of 109–1011 Ωcm at 303 K, whereas that of ferrocytochrome c3 was extremely low, and possessed an anomalous temperature dependence. The resistivity of cytochrome c3 was as low as 57 Ωcm at 268 K. The inclination of the temperature dependence corresponded to the value of 3.7×105 J·mol−1. Above this temperature, the resistivity increased.
CORRELATION BETWEEN FORMULA WEIGHTS AND ABSOLUTE MOBILITIES OBTAINED BY ISOTACHOPHORESIS FOR ALKYLAMMONIUM AND CARBOXYLATE IONS
Authors: Kiso Yoshiyuki , Hirokawa Takeshi
Published: July 2006

Absolute mobilities of n-alkylammonium, mono- and dicarboxylate ions were obtained by means of isotachophoresis. The mobilities were inversely proportional to the square roots of formula weights in the regions of ca. 60 to 130, ca. 70 to 160 and ca. 140 to 200 for the above ions, respectively.
PHOTOCHEMICAL REACTIONS OF N-ALKYL- AND N-ALLYL-o-SULFOBENZIMIDES
Authors: Kamigata Nobumasa , Saegusa Tomitsugu , Fujie Shin-ichi , Kobayashi Michio
Published: July 2006

Photolysis of N-alkyl-o-sulfobenzimides 1 in isopropyl alcohol or in benzene was investigated. N-Alkylbenzamides 2 were the major product in isopropyl alcohol, while N-alkyl-o-phenylbenzamides 9 were formed in good yield in benzene. A reaction mechanism involving the homolysis of the N–S bond in 1 followed by the elimination of sulfur dioxide is proposed.
CHEMOSPECIFIC CARBONYL ALLYLATION BY ALLYLTIN REAGENTS. SYNTHESIS OF γ,δ-UNSATURATED ALCOHOLS
Authors: Naruta Yoshinori , Ushida Satoshi , Maruyama Kazuhiro
Published: July 2006

Allyltrialkyltin reagent reacted with carbonyl compounds in the presence of BF3OEt2 to give homoallyl alcohols. The yields were excellent and high chemospecificity was attained. By the reaction of 4-tert-butylcyclohexanone and 2-methylcyclohexanone trans alcohols were stereoselectively obtained in 92 and 94% isomeric purity, respectively.
EFFECTS OF THE ADDITION OF METAL OXIDES ON THE REDUCTION OF NITRIC OXIDE WITH HYDROGEN ON Pt/Al2O3 CATALYST
Authors: Kosaki Yukio , Miyamoto Akira , Murakami Yuichi
Published: July 2006

The selectivity to NH3 in the NO–H2 reaction on Pt/Al2O3 has been markedly decreased by the addition of metal oxides. This effect has been found to be brought by the hydrogen spillover from Pt to metal oxides, and by a successive reaction of NH3(the NO–NH3 reaction) as an intermediate of the NO–H2 reaction.
AN ELECTRON SPIN RESONANCE STUDY ON THE ASSOCIATION OF NITROXIDE SPIN PROBES WITH AGGREGATES OF PEPTIDE-SURFACTANTS
Authors: Murakami Yukito , Nakano Akio , Iwamoto Kiyoshi , Yoshimatsu Akira
Published: July 2006

The association of nitroxide spin probes with aggregates of peptide-surfactants was investigated in aqueous media. The spin-labeled fatty acid was completely incorporated into the peptide-surfactants with anisotropic immobilization, while the less hydrophobic nitroxide radical was distributed between the hydrophobic and electrostatic regions of the aggregates. The peptide-surfactants may form tighter aggregates than the ordinary micelles.
TOPOTAXY BETWEEN TiO2 AND BaTiO3
Authors: Suyama Yoko , Oda Yutaka , Kato Akio
Published: July 2006

The topotactic reactions between TiO2 and barium salts were found and the crystallographic orientation relationships between TiO2 and BaTiO3 were elucidated as follows.

[001]TiO2(R)//[101]BaTiO3and[100]TiO2(R)//[1\bar1\bar1]BaTiO3.

[100]TiO2(A)//[100]BaTiO3and[010]TiO2(A)//[010]BaTiO3.
SYNTHESIS OF METHYL β-d-VIRENOSIDE
Authors: Yoshimura Juji , Hong Namgi , Sato Ken-ichi
Published: July 2006

Methyl 6-deoxy-3-C-methyl-β-d-gulopyranoside (1: methyl β-d-virenoside) has been synthesized from galactose. The introduction of methyl branching at C-3 position was achieved by the Grignard reaction.
FACILE REDUCTION OF SULFINIC ACID TO DISULFIDE WITH THIOL AND CHLOROTRIMETHYLSILANE
Authors: Oae Shigeru , Togo Hideo , Numata Tatsuo , Fujimori Ken
Published: July 2006

Sulfinic acids were found to be readily reduced to the corresponding disulfide quantitatively at room temperature upon treatment with a mixture of thiols and chlorotrimethylsilane.
ENHANCED CIRCULAR DICHROISM AND FLUIDITY OF DISK-LIKE AGGREGATES OF A CHIRAL, SINGLE-CHAIN AMPHIPHILE
Authors: Kunitake Toyoki , Nakashima Naotoshi , Morimitsu Kozo
Published: July 2006

Chiral, single-chain ammonium amphiphiles which possess the alanine unit formed disk-shaped bilayer aggregates in water. Circular dichroism of the chiral aggregate was much enhanced at temperatures below the phase transition.
SYNTHESIS OF 1-O-β-d-GLUCOPYRANOSYL-1l-(1,3,4/2,6)-4-AMINO-6-HYDROXYMETHYL-1,2,3-CYCLOHEXANETRIOL. ON THE STRUCTURE OF THE ANTIBIOTIC, VALIDAMYCIN A
Authors: Ogawa Seiichiro , Chida Noritaka , Suami Tetsuo
Published: July 2006

1-O-β-d-Glucopyranosyl-1l-(1,3,4/2,6)-4-amino-6-hydroxymethyl-1,2,3-cyclohexanetriol (12) was synthesized and found to be identical with β-d-glucopyranosyl-validamine derived from validamycin A. The position at which validamine moiety was substituted with d-glucopyranose was revised to C-l on the basis of the present synthesis.
NOVEL E–Z EQUILIBRIUM OF N-ALKYL-α-ALKOXYCARBONYLNITRONE IN SOLUTION
Authors: Inouye Yoshinobu , Hara Junko , Kakisawa Hiroshi
Published: July 2006

Four N-alkyl-α-alkoxycarbonylnitrones were prepared and their NMR spectra in C6D6, CDCl3, or CD3SOCD3 were measured. From the analyses of the spectra, it was found that the nitrones exhibited a facile equilibrium in all solvents used and E/Z ratio in equilibrium depended largely on the polarity of the solvent.
TRIPLET BENZENE-SENSITIZED CYCLOREVERSION OF ARYLCYCLOBUTANE
Authors: Kitamura Takashi , Toki Susumu , Takamuku Setsuo , Sakurai Hiroshi
Published: July 2006

γ-Radiolysis of triphenylcyanocyclobutane (1) in benzene forms stilbene, cinnamonitrile and a stereo isomer of 1. The effect of additives and the kinetic treatment show that the cycloreversion of 1 proceeds by benzene triplet sensitization. Spectroscopic measurement in pulse radiolysis suggests the existence of 1,4-biradical as an intermediate.
ALBANINS F AND G, NATURAL DIELS–ALDER ADDUCTS FROM MULBERRY
Authors: Takasugi Mitsuo , Ishikawa Shin-ichi , Nagao Shigemitsu , Masamune Tadashi , Shirata Akira , Takahashi Kokichi
Published: July 2006

The structure elucidation of albanins F and G, two of the pre-existing antifungal principles of shoot epidermis of mulberry, is described.
STRUCTURES OF EFFUSANINS, ANTIBACTERIAL DITERPENOIDS FROM RABDOSIA EFFUSA
Authors: Fujita Tetsuro , Takeda Yoshio , Shingu Tetsuro , Ueno Akira
Published: July 2006

Five new diterpenoids, effusanin A, B, C, D and E with antibacterial activity were isolated from the stem and leaves of Rabdosia effusa and their structures were deduced from chemical and spectral findings.
KINETIC STUDIES OF THE INTERACTION BETWEEN SILVER ION AND DEOXYRIBONUCLEIC ACID
Authors: Yakabe Yoshikuni , Sano Takayuki , Ushio Hidetoshi , Yasunaga Tatsuya
Published: July 2006

The interactions between silver ion and DNA were studied kinetically by the stopped flow method. The experimental results show that the reaction between silver ion and GC base pair of DNA proceeds by two steps and that between silver ion and AT base pair of DNA with one step.
SYNTHESIS OF dl-SEPTICINE
Authors: Iwashita Takashi , Suzuki Masahiro , Kusumi Takenori , Kakisawa Hiroshi
Published: July 2006

Cycloaddition reaction of 1-pyrroline 1-oxide with 2,3-bis(3,4-dimethoxyphenyl)butadiene proceeded regioselectively to give two stereoisomeric isoxazolidine derivatives, one of which was converted into septicine by three-step reactions.
NMR SPECTROSCOPIC BEHAVIOR OF THE COMPLEXES OF SOME POLYETHYLENE GLYCOL DERIVATIVES WITH ALKALI IONS
Authors: Hiratani Kazuhisa , Aiba Seiichi , Nakagawa Tsutomu
Published: July 2006

Four triethylene glycol derivatives, which have different end substituents, quinolyl and ortho-substituted phenyl groups, were synthesized in good yields.

The proton NMR spectrum of these compounds and their complexes with alkali and ammonium ions was measured to show that these compounds exhibit complexation specificity for sodium ion. On complexation, these acyclic polyethers are considered to wrap adequately themselves around sodium ion like a pseudocyclic species.
A USEFUL METHOD FOR SELECTIVE ACYLATION OF ALCOHOLS USING 2,2′-BIPYRIDYL-6-YL CARBOXYLATE AND CESIUM FLUORIDE
Authors: Mukaiyama Teruaki , Pai Fong-Chang , Onaka Makoto , Narasaka Koichi
Published: July 2006

Primary and secondary alcohols are acylated under mild conditions by the use of 2,2′-bipyridyl-6-yl carboxylates and cesium fluoride. Furthermore, the reaction is successfully applied to selective acylation of a primary carbinol group of diols containing primary and secondary carbinol groups or exclusive O-acylation of aromatic amino alcohols.
ESR STUDIES OP THE ALKALI METAL COMPLEXES OF GALVINOXYL-LABELED-BENZO-15-CROWN-5
Authors: Mukai Kazuo , Iida Nobuhito , Kumamoto Yoshiko , Kohama Hiroyuki , Ishizu Kazuhiko
Published: July 2006

A galvinoxyl derivative of benzo-15-crown-5 (1) has been synthesized, and the complex formation between the spin labeled crown ether (1) and the alkali metal thiocyanate has been studied by ESR measurement. A typical triplet ESR spectrum was observed for the potassium complex in ethanol rigid matrix at 77 K, clearly indicating the (1:2) complex formation between the KNCS salt and the 1. On the other hand, the sodium complex showed a symmetrical single line, suggesting the (1:1) complex formation between the NaNCS salt and the 1.