bluuebunny/crossref_metadata_2025_split huggingface dataset:
SYNTHESIS AND REACTIONS OF VINYLPHOSPHONATES BEARING ELECTRONEGATIVE SUBSTITUENTS
Authors: Minami Toru , Suganuma Hiroyuki , Agawa Toshio 
Published: July 2006

Abstract
Ethyl α-(diethylphosphono)acrylate (1a) and α-(diethylphosphono)acrylonitrile (1b) prepared by thermolysis of ethyl 2-diethylphosphono-2-phenylsulfinylpropionate (2a) and 2-diethylphosphono-2-phenylsulfinylpropionitrile (2b) react with various nucleophiles to generate corresponding phosphonate anions, which subsequently react with carbonyl compounds to give annelated or acyclic olefinic compounds in good yields.
SYNTHESES OF 5-ARYL- AND 5,15-DIARYL-2,3,7,8,12,13,17,18-OCTAETHYLPORPHINES
Authors: Ogoshi Hisanobu , Sugimoto Hiroshi , Nishiguchi Takahiro , Watanabe Tsutomu , Matsuda Yoshiro , Yoshida Zen-ichi 
Published: July 2006

Abstract
5-Aryl- and 5,15-diaryl-2,3,7,8,12,13,17,18-octaethylporphines were prepared with high selectivity by the condensation of bis-(3,4-diethylpyrryl)methane with aromatic aldehydes by varying acidic media.
DIRECT CHEMILUMINESCENCE FROM AIR OXIDATION OF 9,10-DIISOBUTYRYLANTHRACENE AND RELATED COMPOUNDS IN ALKALINE APROTIC SOLVENTS
Authors: Kamiya Isao , Sugimoto Takashi 
Published: July 2006

Abstract
It was previously reported that excited triplet products were predominantly generated from air oxidation of various simple ketones in alkaline aprotic solvents. In the present study, we have found that excited singlet product, 9-isobutyrylanthracene-10-carboxylic acid which emits fluorescence, was generated from air oxidation of 9,10-diisobutyrylanthracene under the same experimental conditions. This finding lends strong support to the hypothesis that dioxetanes may be the critical intermediates to give excited singlet products (good emitters).
A STUDY OF REVERSIBLE BINDING OF MOLECULAR OXYGEN TO COBALT(II) OCTAETHYLPORPHYRIN BY 57Co MÖSSBAUER EMISSION SPECTROSCOPY
Authors: Sakai Hiroshi , Maeda Yutaka , Ogoshi Hisanobu , Sugimoto Hiroshi , Yoshida Zen-ichi 
Published: July 2006

Abstract
57Co Mössbauer emission spectra of Co(II) octaethylporphyrin, Co(II) OEP, and its pyridine and oxygen adduct, Co(II) OEP·Py·O2, have been measured in the dimethylformamide frozen solution at 20°K. The former consists of two chemical species of Fe(II) OEP. The latter exhibits Fe(II) OEP·Py·O2 and Fe(II) OEP·Py2. The oxygenated complex is changed to the bis-pyridine adduct by evacuation at about −30°C.
REACTION OF TRICHLORO- and DICHLORO-ACETIC ACID WITH 1-ALKENES CATALYZED BY DICHLOROTRIS (TRIPHENYLPHOSPHINE) RUTHENIUM (II). A CONVENIENT ROUTE TO 2-CHLORINATED 4-ALKYL-γ-BUTYROLACTONES
Authors: Matsumoto Hideyuki , Nakano Taichi , Ohkawa Kazuhiro , Nagai Yoichiro 
Published: July 2006

Abstract
In the presence of dichlorotris(triphenylphosphine)ruthenium(II), trichloro- and dichloro-acetic acid were found to react with 1-alkenes under mild conditions to afford 4-alkyl-2,2-dichloro- and 4-alkyl-2-chloro-γ-butyrolactones, respectively, in good yields.
OXIDATION OF ALCOHOLS WITH 2-FLUORO-1-METHYLPYRIDINIUM TOSYLATE AND DIMETHYL SULFOXIDE OR HEXAMETHYLENETETRAMINE
Authors: Hojo Ko , Mukaiyama Teruaki 
Published: July 2006

Abstract
Primary and secondary alcohols activated by 2-fluoro-1,3-dimethylpyridinium tosylate reacted with dimethyl sulfoxide to give corresponding aldehydes and ketones in good yields. Oxidation of aromatic alcohols was also effected by the reaction of the activated alcohols with hexamethylenetetramine, followed by acid hydrolysis.
DEHYDROIRIDODIAL, THE PUNGENT PRINCIPLE OF ACTINIDIA POLYGAMA MIQ.
Authors: Yoshihara Kazuo , Sakai Tsutomu , Sakan Takeo 
Published: July 2006

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
CuCl2 solubilized by Benzo-15-crown-5 in dry CHCl3 showed the anomalous g-anisotropy inversion (g|| &lt;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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.