bluuebunny/crossref_metadata_2025_split huggingface dataset:
SELECTIVE N-METHYLATION OF PEPTIDE BOND. PREPARATION AND PROPERTIES OF [MeOrn2,2′, d-MePhe4,4′]GRAMICIDIN S
Authors: Kawai Masao , Ohya Masashi , Butsugan Yasuo , Saito Kazuki , Higashijima Tsutomu 
Published: July 2006

Abstract
Diphthaloyl derivative of gramicidin S was subjected to selective N-methylation using CH3I–Ag2O in DMF. Methylation occurred exclusively at ornithine and d-phenylalanine residues affording tetra-N-methylated product in high yield. Removal of the phthaloyl groups furnished the title compound, which showed essentially the same antimicrobial activity as gramicidin S itself.
SUPPORT EFFECT ON THE HYDROCRACKING ACTIVITY OF MOLYBDENUM CATALYSTS
Authors: Shimada Hiromichi , Kurita Minoru , Sato Toshio , Yoshimura Yuji , Hirata Takahiro , Konakahara Takeo , Sato Kenji , Nishijima Akio 
Published: July 2006

Abstract
Hydrocracking reactions of diphenylmethane under high H2 pressure were carried out to elucidate the requisite properties of the support for molybdenum catalysts. The effectiveness order of the supports was TiO2 &gt; SiO2 &gt; ZrO2 &gt; γ-Al2O3 &gt; MgO.
DUAL PHOTOREACTIONS OF PHTHALAZINE FROM THE LOWEST EXCITED SINGLET AND TRIPLET STATES
Authors: Sano Ryo , Inoue Hiroyasu 
Published: July 2006

Abstract
Phthalazine undergoes the photoreduction and the photo-reductive dimerization simultaneously to give 1,2-dihydrophthalazine and its dimer (1H,1′H,2H,2′H-1,1′-biphthalazine), respectively, upon ultraviolet light irradiation in 2-propanol. It has been suggested that the photoreduction proceeds through the lowest excited singlet state and the photodimerization through the lowest triplet state.
SYNTHESIS OF OPTICALLY PURE (R)- AND (S)-5-n-HEXADECANOLIDE. A PROPOSED PHEROMONE COMPONENT FROM ORIENTAL HORNET
Authors: Kikukawa Tadashi , Tai Akira 
Published: July 2006

Abstract
Optically pure (R)- and (S)-5-n-hexadecanolide have been easily prepared by the reaction between optically active 1-bromo-3-tetrahydropyranyloxytetradecane (5) and lithium α-lithioacetate and the following lactonization. 5 was derived from optically pure 3-hydroxytetradecanoic acid obtained by the method reported before.
FLUORIDE INDUCED ALKYLATION OF α-SILOXYAMINES. A NEW METHOD FOR TRANSALKYLATION OF TERTIARY AMINES VIA THEIR N-OXIDES
Authors: Tokitoh Norihiro , Okazaki Renji 
Published: July 2006

Abstract
α-Siloxyamines obtained from tertiary amines via their N-oxi-des react with alkyl halides to give the corresponding α-siloxyammonium salts, which can be converted into new tertiary amines by fluoride induced desilylation reaction.
REGIOSELECTIVE PREPARATION OF KINETIC TRIMETHYLSILYL ENOL ETHERS FROM β-KETO SILANES
Authors: Yamamoto Yohsuke , Ohdoi Keisuke , Nakatani Masayuki , Akiba Kin-ya 
Published: July 2006

Abstract
Kinetic trimethylsilyl enol ethers were prepared regioselectively by the two-step method, i.e., trimethylsilyl triflate catalyzed rearrangement of β-keto silanes which were prepared from trimethylsilylmethylcopper and acid chlorides.
REACTIONS OF BENZENE VAPOR-CALCIUM ATOM WITH ORGANIC HALIDES AND CARBONYL COMPOUNDS
Authors: Mochida Kunio , Takeuchi Hidenori , Hiraga Yoo , Ogawa Hiroyasu 
Published: July 2006

Abstract
Reactions of benzene vapor-calcium atom with organic halides and carbonyl compounds were examined. Benzene vapor-calcium atom reacted with organic halides (RX) to give phenyl-substituted products (PhR) and reduced products (RH). The reactions of benzene vapor-calcium atom with ketones (RR′CO) or benzaldehyde gave two kinds of alcohol PhRR′COH and RR′CHOH, or Ph2CHOH and PhCH2OH, respectively
A NEW SYNTHETIC ROUTE OF β-HYDROXYALKYLPHOSPHONATES FROM β,γ-EPOXYALKYLPHOSPHONATES
Authors: Nagase Toshio , Kawashima Takayuki , Inamoto Naoki 
Published: July 2006

Abstract
β-Hydroxyalkylphosphonates were synthesized from β,γ -epoxyalkylphosphonates and RMgX/ cat. CuI reagents, which is a new synthetic route for the various types of α- and/or γ-substituted β-hydroxyalkylphosphonates.
EFFECTS OF SOLVENT MOLECULES ON THE d-d TRANSITION SPECTRUM OF POTASSIUM ETHYLENEDIAMINETETRAACETATOCOBALTATE(III)
Authors: Taura Toshiaki 
Published: July 2006

Abstract
The absorption spectra of the title compound were measured in a variety of solvents. It was found that the peak position (λmax) of the first d-d absorption band is strikingly influenced by solvent molecules. The magnitude of this influence could be estimated by using the acceptor numbers of the solvents.
SYNTHESIS OF ZINC OXIDE POWDER BY HYDROLYSIS OF BIS(ACETYLACETONATO)ZINC(II) IN AQUEOUS SOLUTION
Authors: Kamata Kiichiro , Hosono Hirotsugu , Maeda Yuji , Miyokawa Kikuo 
Published: July 2006

Abstract
Pure and fine powder of zinc oxide was prepared by hydrolysis of bis(acetylacetonato)zinc(II) in methanol–water mixture. A significant difference in the particle shape was observed by TEM between ZnO powders prepared at 25 and 80 °C.
REACTIONS AND CATALYTIC PROPERTIES OF RARE EARTH METALS WITH UNSATURATED COMPOUNDS: SAMARIUM AND YTTERBIUM CATALYSTS FORMED IN LOW-TEMPERATURE MATRICES
Authors: Imamura Hayao , Ohmura Akira , Tsuchiya Susumu 
Published: July 2006

Abstract
Active samarium and ytterbium catalysts were prepared by dispersing rare earth atoms in frozen organic matrices at −196 °C. They exhibited specific properties for the hydrogenation of ethylene, and buta-1,3-diene in which trans-but-2-ene was selectively formed by 1,4-addition. Enhanced isomerization activity of methylacetylene to allene was also observed.
THE OXIDATION OF 2-CYCLOHEXEN-1-ONES TO 2-CYCLOHEXENE-1,4-DIONES
Authors: Freer Vernon J , Yates Peter 
Published: July 2006

Abstract
Treatment of 5,5-dimethyl-2-cyclohexen-1-one and isophorone with phosphomolybdic acid, potassium dichromate, cupric sulfate, and air gives 5,5-dimethyl- and 3,5,5-trimethyl-2-cyclohexene-1,4-dione, respectively. In the latter reaction treatment of the crude product with aqueous base leads to the formation of 2,3,6,7-tetrahydro-2,2,6,6,-tetramethylanthracene-1,4,5,8-tetrone.
HIGH REGIOSELECTIVITIES IN 1,3-CYCLOADDITION OF INTERMEDIARY CARBANIONS PROMOTED BY TETRABUTYLAMMONIUM FLUORIDE AND AZOMETHINE YLIDE CATALYZED BY TRIFLUOROACETIC ACID
Authors: Achiwa Kazuo , Imai Nobuyuki , Motoyama Tadashi , Sekiya Minoru 
Published: July 2006

Abstract
Tetrabutylammonium fluoride catalytically induced a regioselective 1,3-cycloaddition of the carbanions leading to 2,2,4-substituted pyrrolidines. And in the presence of trifluoroacetic acid, the corresponding 2,2,3-substituted products were regioselectively obtained via the intermediary azomethine ylide.
PHOTOCHEMICAL REDUCTION AND AIR OXIDATION OF cis-DIAMMINEPLATINUM α-PYRROLIDONE TAN IN AQUEOUS SOLUTION
Authors: Matsumoto Kazuko 
Published: July 2006

Abstract
cis-Diammineplatinum α-pyrrolidone tan cation, [Pt4(NH3)8(C4H6NO)4]6+, is proved to be reduced to dark blue [Pt4(NH3)8(C4H6NO)4]5+ and yellow [Pt4(NH3)8(C4H6NO)4]4+ by water and be oxidized by air to a yellow species of Pt(III). The reduction reaction is accelerated by visible light irradiation. Both the reduction and oxidation reactions are completely reversible and the addition of Ce4+ or Fe2+ quantitatively restores the original species, respectively.
CRYSTALLIZATION OF POLY(ETHYLENE GLYCOL) DI-9-ANTHROATE ADSORBED ON POLY(METHACRYLIC ACID) MEMBRANE IN WATER
Authors: Osada Yoshihito , Koike Masayoshi 
Published: July 2006

Abstract
A poly(ethylene glycol) di-9-anthroate made adsorption on the poly(methacrylic acid) membrane through polymer membrane complexation in water and crystallized spontaneously to give a single-crystal with unique morphological texture on the surface of the membrane.
SYNTHESIS OF RIBOSTAMYCIN. AN APPLICATION OF A CHEMICAL CONVERSION METHOD FROM CARBOHYDRATE TO AMINOCYCLITOL
Authors: Yoshikawa Masayuki , Ikeda Yoshiharu , Takenaka Kohei , Torihara Masahiro , Kitagawa Isao 
Published: July 2006

Abstract
An aminoglycoside antibiotic ribostamycin was synthesized from d-glucosamine and ribose via an amino-trisaccharide intermediate, which was prepared through successive selective glycosidations on the 1,6-anhydro-d-glucosamine moiety.
ACTIVATED METALLIC NICKEL IN THE PREPARATION OF SYMMETRICAL 1,3-DIARYLPROPAN-2-ONES FROM BENZYLIC HALIDES AND ALKYL OXALYL CHLORIDES
Authors: Inaba Shin-ichi , Rieke Reuben D 
Published: July 2006

Abstract
Oxidative addition of benzylic halides to nickel in the metallic state followed by insertion of carbon monoxide generated from alkyl oxalyl chlorides proceeded smoothly to give symmetrical 1,3-diarylpropan-2-ones in moderate yields.
ASYMMETRIC REDUCTION OF ALKYL ARYL KETONES WITH LITHIUM BOROHYDRIDE USING N-BENZOYLCYSTEINE AS CHIRAL LIGAND
Authors: Soai Kenso , Yamanoi Takashi , Oyamada Hidekazu 
Published: July 2006

Abstract
N-Benzoylcysteine, a chiral ligand possessing sulfur donor atom, was found to be highly effective in enantioselective reduction of alkyl aryl ketones with lithium borohydride (up to 92–93%e.e.).
1,4-CHIRALITY TRANSFER VIA THE [2,3]-WITTIG REARRANGEMENT OF CHIRAL ALLYLIC PROPARGYL ETHER SYSTEM. A NEW, PRACTICAL ENTRY TO CHIRAL PROPARGYLIC ALCOHOLS
Authors: Sayo Noboru , Shirai Fumiyuki , Nakai Takeshi 
Published: July 2006

Abstract
The [2,3]-Wittig rearrangement of enantiomerically-enriched α-methylallyl propargyl ethers provides a high degree (ca. 90%) of 1,4-chirality transfer, together with 95–98% of (E)-selectivity. The observed sense of 1,4-chirality transfer is discussed on mechanistic grounds.
CHEMO- AND REGIOSELECTIVE REDUCTION OF α,β-EPOXY KETONES TO β-HYDROXY KETONES BY SODIUM HYDROGENTELLURIDE
Authors: Osuka Atsuhiro , Taka-Oka Koji , Suzuki Hitomi 
Published: July 2006

Abstract
α,β-Epoxy ketones were chemo- and regioselectively reduced to β-hydroxy ketones by sodium hydrogenteiiuride in good yields.
N-(TRIMETHYLSILYLMETHYL) PYRIDINIUM TRIFLUOROMETHANESULFONATES AS FACILE PRECURSORS FOR NONSTABIL1ZED PYRID1NIUM METHYLIDES
Authors: Tsuge Otohiko , Kanemasa Shujf , Kuraoka Satoru , Takenaka Shigeorf 
Published: July 2006

Abstract
As facile precursors for nonstabilized pyridinium methylides N-(trimethylsilylmethyl)pyridinium triflates were synthesized. Cesium fluoride induced desilylation of the precursors liberated the nonstabilized pyridinium methylides which were trapped as the cycloadducts to dimethyl acetylenedicarboxylate.
ON THE STERIC COURSE OF THE ADDITION OF CROTYL METALS ONTO (2S,3S) 2,3-ISOPROPYLIDENEDIOXY BUTYRALDEHYDE AND (3S,4S) 3,4-ISOPROPYLIDENEDIOXYPENTANONE. SYNTHESIS OF 2,6-DIDEOXY-2C METHYL BRANCHED SUGARS OF THE l-SERIES
Authors: Fronza Giovanni , Fuganti Claudio , Grasselli Piero , Pedrocchi-Fantoni Giuseppe , Zirotti Carlo 
Published: July 2006

Abstract
The mode of addition and the synthetic applications of the products ined in the reaction of BrMgCH2CH=CHCH3 and BrCH2CH=CHCH3/CrCl2 with α,β-dialkoxy carbonyl compounds are reported.
ORGANIC SYNTHESIS USING HALOBORATION REACTION. IV. IODOBORAXION REACTION OF TERMINAL ALLENES
Authors: Hara Shoji , Takinami Satoru , Hyuga Satoshi , Suzuki Akira 
Published: July 2006

Abstract
Terminal allenes react smoothly with B-iodo-9-borabicyclo[3.3.1]nonane (B-iodo-9-BBN), and the subsequent protonolysis with acetic acid gives the corresponding 2-iodoalkenes.
AN ELECTROCHEMICAL SYNTHESIS OF 2-HYDROXY-2-(p-ISOBUTYLPHENYL)PROPIONIC ACID
Authors: Ikeda Yoshikazu , Manda Eiichiro 
Published: July 2006

Abstract
The title compound, which is a good precursor of 2-(p-isobutylphenyl)propionic acid, was synthesized in 85% yield by the electrochemical reduction of p-isobutylacetophenone in DMF containing 0.5 M BU4NI on Hg pool cathode by passing 2.0 F/mol electricity with a constant current density of 48.2 mA/cm2 in the presence of CO2.
IDENTIFICATION OF VARIOUS INTERMEDIATES IN THE REACTION OF CUPRIC IONS WITH CYANIDE IONS BY ESR SPECTROSCOPY. APPLICATION OF A NEW RAPID-FREEZING APPARATUS
Authors: Yokoi Hiroshi , Hanaki Akira 
Published: July 2006

Abstract
Various intermediates of mononuclear copper(II) cyanide complexes in the reaction of cupric ions with cyanide ions have been first identified by ESR spectroscopy after the use of a newly-constructed rapid-freezing apparatus. The formation of these intermediates has been found to depend primarily on the ratio [CN−]/[Cu2+] and pH values. Possible structures of these intermediate complexes have been estimated by experiments with isotopes and by the application of the “rule of average environment” to their ESR parameters determined.
n-TYPE SEMICONDUCTING BEHAVIOR OF 5,10,15,20-TETRA(3-PYRIDYL)PORPHYRIN
Authors: Yamashita Kazuo , Matsumura Yuhei , Harima Yutaka , Miura Shozo , Suzuki Hitomi 
Published: July 2006

Abstract
The photovoltaic effects observed for the indium-tin oxide (ITO)/5,10,15,20-tetra(3-pyridyl)porphyrin (TPyP)/Al cell are consistent with the existence of a Schottky junction at the interface between ITO and TPyP, which acts as an n-type semiconductor. The effects of O2 and H2 on the short-circuit photocurrents and the presence of a blocking contact at the TPyP/p-type porphyrin junction are explained in terms of the n-type semiconducting behavior of TPyP.
TRIMETHYLSILYL TRIFLUOROMETHANESULFONATE (TRIMETHYLSILYL TRIFLATE) AS AN EXCELLENT GLYCOSIDATION REAGENT FOR ANTHRACYCLINE SYNTHESIS. SIMPLE AND EFFICIENT SYNTHESIS OF OPTICALLY PURE 4-DEMETHOXYDAUNORUBICIN
Authors: Kimura Yoshikazu , Suzuki Michiyo , Matsumoto Teruyo , Abe Rumiko , Terashima Shiro 
Published: July 2006

Abstract
The title reagent was found to effect the glycosidation of (+)-4-demethoxyanthracyclinones with N-trifluoroacetyl-1,4-di-O-p-nitrobenzoyl-l-daunosamine, giving the ot-glycosides in 99% yields. Sequential deprotections of the glycoside readily afforded optically pure (+)-4-demethoxydaunorubicin.
CROSSOVER OF THE LOW TEMPERATURE HEAT CAPACITIES OF BIPHENYL AND p-TERPHENYL
Authors: Saito Kazuya , Atake Tooru , Chihara Hideaki 
Published: July 2006

Abstract
Heat capacities of biphenyl, p-terphenyl, and their deuterated analogues were measured between 3 and 300 K. As the temperature decreases, the heat capacity of biphenyl decreases less steeply than that of p-terphenyl, and they cross each other at 12 K. A simple model calculation of lattice vibration shows that the crossover is due to the greater twisting flexibility of phenyl rings in biphenyl.
MARKED DEPENDENCE OF THE SELECTIVITY IN OXIDATION OF A PAIR OF ASSOCIATING THIOLS ON THE STRUCTURE OF COEXISTING THEIR DECEPTOR
Authors: Endo Tadashi , Kaneko Yuji , Mitsuhashi Masatoshi , Endo Masayuki , Takeda Yukiko , Ito Masato M , Nikki Kunio , Nakagawa Naoya , Matsushita Kazuhiro 
Published: July 2006

Abstract
The selectivity in oxidation of a pair of associating thiols with oxygen, on addition of a deceptor structurally related to the thiol, changed remarkably with the structure of the substituent of the deceptor.
SYNTHESIS OF Fe–Mg MULTILAYERED FILMS WITH ARTIFICIAL SUPERSTRUCTURES
Authors: Shinjo Teruya , Kawaguchi Kenji , Yamamoto Ryoichi , Hosoito Nobuyoshi , Takada Toshio 
Published: July 2006

Abstract
By a vacuum deposition method, multilayered films with artificial superstructure have been prepared from mutually insoluble elements, Fe and Mg. X-Ray diffraction confirmed the establishment of very short artificial periods, e.g. Fe(0.8 nm)–Mg(2.4 nm). The multilayer deposition is a very promising technique to fabricate new materials.
CRYSTAL STRUCTURE OF γ-CYCLODEXTRIN AT ROOM TEMPERATURE
Authors: Harata Kazuaki 
Published: July 2006

Abstract
The crystal structure of γ-cyclodextrin 13.3 hydrate was determined by the X-ray method on the basis of the data measured at room temperature. The γ-cyclodextrin molecule is in a round shape, and is slightly distorted from the regular octagonal structure. The γ-cyclodextrin cavity includes 5.3 water molecules which occupy the 13 sites.
THE TOTAL SYNTHESIS OF (±)-MEGAPHONE, A CYTOTOXIC NEOLIGNAN
Authors: Matsumoto Takashi , Imai Sachihiko , Usui Shuji , Suetsugu Akira , Kawatsu Shunzi , Yamaguchi Tadashi 
Published: July 2006

Abstract
The racemic megaphone, a cytotoxic neolignan, has been synthesized from 3,4,5-trimethoxybenzaldehyde via an intermediate, 2-methoxycarbonyl-3-methyl-4-(3,4,5-trimethoxyphenyl)-γ-butyrolactone.
REDUCTION OF AROMATIC NITRO COMPOUNDS TO AMINES BY BENZENETELLUROL
Authors: Ohira Noriyuki , Aso Yoshio , Otsubo Tetsuo , Ogura Fumio 
Published: July 2006

Abstract
Benzenetellurol was conveniently generated by methanolysis of phenyl trimethylsilyl telluride or reduction of diphenyl ditelluride with phosphinic acid or sodium borohydride, and smoothly reduced aromatic nitro compounds to the corresponding amines.
ENE-TYPE CHLORINATION OF OLEFINS WITH DICHLORINE MONOXIDE
Authors: Torii Sigeru , Tanaka Hideo , Tada Nobuhito , Nagao Sigemitsu , Sasaoka Michio 
Published: July 2006

Abstract
New ene-type chlorination of olefins with dichlorine monoxide (Cl2O) and its application to the synthesis of chloroazetidinones, key intermediates of penicillin-cephalosporin conversion, are described.
INSERTION OF OXYGEN ATOM INTO FUSED CYCLOBUTANE RINGS VIA AN ALKOXYL RADICAL REARRANGEMENT
Authors: Suginome Hiroshi , Liu Chi Fu , Furusaki Akio 
Published: July 2006

Abstract
A new heteroatom insertion into cyclobutane rings via β-scission of alkoxyl radicals generated from photocycloadducts between 4-hydroxycoumarin and cycloalkenes is described.
INFRARED-INDUCED CONFORMATIONAL ISOMERIZATION OF 2-CHLOROETHYLAMINE IN AN ARGON MATRIX
Authors: Nakata Munetaka , Tasumi Mitsuo 
Published: July 2006

Abstract
The infrared spectrum of 2-chloroethylamine has been studied in an argon matrix. It has been found that the gauche to trans isomerization around the C–C bond occurs in the matrix by infrared irradiation and the spectrum of the resultant trans form changes by elevating the matrix temperature from 20 to 28 K.
ASYMMETRIC HYDROGENATION OF GERANIOL AND NEROL CATALYZED BY BINAP–RHODIUM(I) COMPLEXES
Authors: Inoue Shin-ichi , Osada Masato , Koyano Kinko , Takaya Hidemasa , Noyori Ryoji 
Published: July 2006

Abstract
A novel direct synthesis of optically active citronellol has been investigated by asymmetric hydrogenation of geraniol and nerol catalyzed by various BINAP–Rh(I) complexes.
A FACILE SYNTHESIS OF α,β-DIHYDROXYKETONES VIA TIN(IV) ENEDIOLATES BY UTILIZING THE REDUCING POWER OF BIS (2-PYRIDINETHIOLATO)TIN(II)
Authors: Ichikawa Junji , Mukaiyama Teruaki 
Published: July 2006

Abstract
Bis(2-pyridinethiolato)tin(II), a stable stannylene, effects oxidative addition to α-dicarbonyl compounds to generate tin(IV) enediolates, which in turn react with aldehydes to give α,β-dihydroxyketones in good yields with moderate diastereoselectivities.
STEREOSELECTIVE PREPARATION OF ΔLLLΔLLL- AND ΛLLLΛLLL- BIS{TRIS(l-CYSTEINATO-N,S)COBALTATE(III)-μ-S,μ-S′,μ-S″}COBALTATE(III)
Authors: Konno Takumi , Aizawa Sen-ichi , Okamoto Ken-ichi , Hidaka Jinsai 
Published: July 2006

Abstract
The title complexes, ΔLLLΔLLL- and ΛLLLΛLLL-[CoIII{CoIII(l-cys-N,S)3}2]3− (L-cys = L-cysteinate), were stereoselectively prepared by the reaction of fac(S)-[Co(l-cys-N,S)3]3− with [CoCl(NH3)5]2+ and Co2+, respectively. The ΔLLLΔLLL and ΛLLLΛLLL isomers were characterized from their absorption, CD, and 13C NMR spectra.
ISOLATION AND SOME PROPERTIES OF A NOVEL VIOLET COPPER PROTEIN FROM A DENITRIFYING BACTERIUM, ALCALIGENES SP.
Authors: Matsubara Teruo , Sano Mitsuru 
Published: July 2006

Abstract
A novel violet copper protein which is a candidate for N2O-reductase, was purified from a denitrifying bacterium, Alcaligenes sp. NCIB 11015. Molecular weight is 120000. Copper content is 0.261%. The absorption, CD, EPR, and EXAFS studies have been carried out for this protein.
HIGHLY STEREOSELECTIVE SYNTHESIS OF α-RIBONUCLEOTIDES VIA A CYCLIC PHOSPHATE
Authors: Mukaiyama Teruaki , Hayashi Yujiro , Hashimoto Yukihiko 
Published: July 2006

Abstract
Several α-ribonucleotides are conveniently synthesized from the cyclic phosphate derivatives of ribose and nucleoside bases in highly stereoselective manner.
CYCLOADDITION OF DIAZOMETHANE TO BUTADIENYLPHOSPHONATES. A NEW APPROACH TO FUNCTIONALIZED PENTADIENYLPHOSPHONATES AND PYRAZOLES
Authors: Minami Toru , Tokumasu Shigehumi , Mimasu Rikako , Hirao Ichiro 
Published: July 2006

Abstract
The cycloaddition reaction of diazomethane with diethyl 1,3-butadienylphosphonates containing electronegative substituents on the α-carbon atom gave diethyl (4-alkenyl-Δ1-pyrazolin-3-yl)phosphonates in high yields. Thermolysis and the base-catalyzed reaction of the pyrazolinylphosphonates produced functionalized 2,4-pentadienylphosphonates and pyrazoles, respectively, in good yields.
THE CHLORO-BRIDGED ONE-DIMENSIONAL NICKEL(II)–NICKEL(IV) MIXED-VALENCE COMPLEX OBTAINED FROM DISPROPORTIONATION REACTION OF THE NICKEL (III) COMPLEX IN (CH3OCH3) (HBF4)
Authors: Yamashita Masahiro , Murase Ichiro , Ikemoto Isao , Ito Tasuku 
Published: July 2006

Abstract
The chloro-bridged one-dimensional NiII–[NiIV mixed-valence complex with 3, 7-diazanonane-1,9-diamine (L),[NiIIL][NiIVCl2] (BF4)4, was prepared by the disproportionation reaction of the NiIII complex, [NiIIICl2L]Cl, using (CH3OCH3)(HBF4) as a solvent and reactant. The authenticity was evidenced by the X-ray photoelectron spectra, electronic spectrum, and electrical conductivity.
LOCAL ORDER IN THE DISTRIBUTION OF Si AND Al IN TECTOALUMINOSILICATES
Authors: Sato Mitsuo 
Published: July 2006

Abstract
Local order of Si,Al distribution in tectosilicates is examined under the restriction of both Loewenstein and Dempsey rules. The distribution of various cluster types permissible for a given Si/Al ratio is predicted by the application of the simplex method of linear programming. There is a good agreement between the predicted and observed values.
HIGHLY LITHIUM-SELECTIVE CROWN ETHER DYES FOR EXTRACTION PHOTOMETRY
Authors: Kimura Keiichi , Tanaka Mutsuo , Kitazawa Sadaya , Shono Toshiyuki 
Published: July 2006

Abstract
Lipophilic 14-crown-4 derivatives bearing a chromogen such as nitrophenol and azophenol residues prove to be excellent extraction-photometric reagents for lithium ion. The lithium selectivities are extremely high, the extraction equilibrium constants for lithium being increased about two orders of magnitude over those for sodium.
TROPONES INCORPORATED INTO 7-OXANORBORNADIENE SKELETON. SYNTHESIS AND ACID-CATALYZED REARRANGEMENT TO 1-HYDROXY-7H-BENZOCYCLOHEPTENES
Authors: Nakazawa Tomoo , Nishikawa Fumiko , Ashizawa Mariko , Jinguji Mamoru , Yamochi Hideki , Murata Ichiro 
Published: July 2006

Abstract
Tropones incorporated into 7-oxanorbornadiene skeleton, 1,4-dihydro-1,4-epoxy-7H-benzocyclohepten-7-ones have been synthesized by the cycloaddition reaction of 4,5-dehydrotropone with furans and their intramolecular π–π interactions and acid-catalyzed rearrangement to 1-hydroxy-7H-benzocyclohepten-7-ones have been studied.
ADSORPTION OF METHYLPHOSPHONIC ACID ON ALUMINA SURFACE STUDIED BY INELASTIC ELECTRON TUNNELING SPECTROSCOPY
Authors: Higo Morihide , Owaki Yasuhiro , Kamata Satuo 
Published: July 2006

Abstract
The vibrational spectrum of methylphosphonic acid adsorbed onto alumina surface was obtained by inelastic electron tunneling spectroscopy. An analysis of the spectrum showed that the methylphosphonic acid is adsorbed as the dibasic phosphonate ion onto the alumina surface.
SIMULTANEOUS DETERMINATION OF GROUP 5A ELEMENTS IN AQUEOUS SOLUTION BY PHOSPHORUS-31 NUCLEAR MAGNETIC RESONANCE SPECTROMETRY
Authors: Fukumoto Takao , Iyoda Jun , Murata Katsuo , Ikeda Shigero 
Published: July 2006

Abstract
Group 5A elements, such as V(V), Nb(V), and Ta(V), react with a molybdophosphate to form ternary heteropoly molybdates quantitatively in the acidic solution. 31P NMR spectra of the compound for each ion exhibit its specific chemical shift and relative peak area in proportion to the concentration of the corresponding complexes. This reaction endues the simultaneous determination of group 5A elements without any separation procedure.