bluuebunny/crossref_metadata_2025 huggingface dataset:
THE PREPARATION OF CIS,CIS-DICYANOCARBONATODIAMMINECOBALTE(III) AND CIS,CIS-OXALATODIAQUODIAMMINECOBALT(III) COMPLEXES
Authors: Enomoto Yoshihiro , Ito Teiichi , Shibata Muraji
Published: July 2006

Two new complexes having cis, cis-geometry with respect to unidentate ligands, Na[Co(CN)2CO3(NH3)2]·2H2O and [Co(C2O4)(H2O)2(NH3)2]NO3, have been prepared and their resolutions have also been achieved.
CRYSTAL SYSTEMS AND LATTICE CONSTANTS OF PEROVSKITE-TYPE COMPOUNDS BaThO3 AND Ba2(BaU)O6
Authors: Nakamura Tetsuro
Published: July 2006

BaThO3 had an orthorhombic lattice (a=6.345Å, b=6.376Å, c=8.992Å) with four pseudomonoclinic perovskite units(a′=c′=4.498Å, b′=4.496Å, β=90°17′). Ba2(BaU)O6 was a tetragonal, ordered perovskite(a=b=6.286Å, c=8.972Å). Ahrens′ radius of octahedral Ba2+ in Ba2(BaU)O6 was evaluated to be 1.16Å via a lattice parameter variation versus radius of M4+ ion in perovskites BaMO3.
STUDIES OF THE PREPARATION AND PHYSICAL PROPERTIES OF MULTIVALENT METAL CONDENSED PHOSPHATES. X. PREPARATION AND THERMAL TRANSFORMATION OF TITANIUM(III) TETRAMETAPHOSPHATE
Authors: Tsuhako Mitsutomo , Motooka Itaru , Kobayashi Masamitsu
Published: July 2006

Titanium tetrametaphosphate Ti4(P4O12)3 is readily formed in a nitrogen stream or vacuum. It is found from the X-ray diffraction pattern that Ti4(P4O12)3 is isomorphous with the A type of aluminum tetrametaphosphate Al4(P4O12)3. Ti4(P4O12)3 shows a large exothermic peak at 250∼400°C and a small endothermic peak at 650∼660°C, and this compound is gradually converted at 250∼400°C to give titanium pyrophosphate TiP2O7 and P2O5.
HEXURONIC ACID AND AMINOSUGAR NUCLEOSIDES VIA STANNIC CHLORIDE- CATALYZED GLYCOSIDATIONS OF SILYLPYRIMIDINES WITH PERACYL-SUGARS
Authors: Lichtenthaler Frieder W , Heerd Arnold , Strobel Kurt
Published: July 2006

On the basis of ten SnCl4-catalyzed N-glycosidations of silylated uracil (1) and N-acetylcytosine (2) with per-O-acyl-glycoses from uronic acids, aminosugars and simple hexoses, the scope of the procedure is evaluated, a major concern being the formation of N-3 nucleosides from 1.
ON THE MAGNETIC SUSCEPTIBILITIES OF SOME IMINOXYL RADICALS
Authors: Yamamoto Kenji , Enoki Toshiaki , Fujito Teruaki , Nakajima Akira , Ohya-Nishiguchi Hiroaki , Deguchi Yasuo
Published: July 2006

Magnetic susceptibilities of organic stable radicals, derivatives of 2,2,6,6-tetramethyl-4-hydroxypiperidine-1-oxyl (TANOL), have been measured. The magnetic susceptibility of Ethyl-TANOL showing a broad maximum at a temperature of 0.17 K agrees well with the antiferromagnetic Heisenberg linear chain model, while that of Methyl-TANOL exhibits a characteristic feature of the three dimensional antiferromagnet.
PHOTOCHEMICAL OXIDATIVE ESTERIFICATION OF BENZALDEHYDE IN ALCOHOLIC SOLUTIONS UNDER OXYGEN ATMOSPHERE
Authors: Sakuragi Hirochika , Tokumaru Katsumi
Published: July 2006

Irradiation of benzaldehyde in methanol, ethanol, and 2-propanol under oxygen atmosphere gave methyl, ethyl, and isopropyl benzoate, respectively, and their yields were increased when a catalytic amount of hydrochloric acid was present.
SELENIUM ANALOGUES OF β-DIKETONES. I. SYNTHESIS OF 1,1,1-TRIFLUORO-4-(2-THIENYL)-4-SELENO-3-BUTEN-2-ONE (SeTTA) AND ITS ANALYTICAL APPLICATION
Authors: Honjo Takaharu
Published: July 2006

The synthesis of a new chelating reagent, l,l,l-trifluoro-4-(2-thienyl)-4-seleno-3-buten-2-one (SeTTA) by the reaction of hydrogen selenide in a stream of nitrogen gas with TTA in absolute ethanol in the presence of hydrogen chloride is described. The analytical application of SeTTA is also discussed.
AN UNUSUAL DIRECTIVE EFFECT IN THE HYDROBORATION OF 2-BROMONORBORNENE WITH 9-BORABICYCLO[3.3.1]NONANE
Authors: Yamamoto Yoshinori , Toi Hiroo , Moritani Ichiro
Published: July 2006

Hydroboration of 2-bromonorbornene with 9-borabicyclo[3.3.1]nonane (9-BBN) places the boron atom predominantly on the beta-position to the bromine substituent. On the other hand, in the hydroboration of 2-chloronorbornene the boron goes alpha to the chlorine substituent. The directive effect of the bromine is discussed.
A SELECTIVITY STUDY ON THE ION-SELECTIVE ELECTRODE WITH A LIQUID MEMBRANE
Authors: Yoshida Nobuo , Ishibashi Nobuhiko
Published: July 2006

The selectivity coefficient of a liquid ion-exchange membrane, in which an ion-exchange site and counter ions are at almost complete dissociation, was studied by a kind of the bi-ionic membrane potential methods. A limiting selectivity coefficient was introduced as an intrinsic quantity of a pair of counter ions for a given membrane and shown to be consistent with the Sandblom–Eisenman–Walker theory on the relation between the selectivity coefficient and ionic parameters.
PROTON MAGNETIC RESONANCE OF METAL AMMINE COMPLEXES. II. THEORETICAL CONSIDERATION OF THE CHEMICAL SHIFTS IN PENTAMMINE COBALT(III) COMPLEXES AND THE RELATION TO COBALT-59 NMR
Authors: Nakashima Yoshiaki , Sakaguchi Ushio , Yoneda Hayami
Published: July 2006

The theoretical relation has been established between proton and cobalt-59 chemical shifts in [Co(NH3)5X] by assuming that proton shifts come mainly from the paramagnetic anisotropy in Co(III) ion. The relation, coupled with Co-59 shift data, can explain very well proton shifts in these complexes.
ESR STUDIES OF THE SHORT-LIVED ORGANIC RADICALS FORMED IN γ-IRRADIATED AQUEOUS SOLUTIONS. SPIN TRAPPING WITH 2-METHYL-2-NITROSOPROPANE
Authors: Taniguchi Hitoshi , Hatano Hiroyuki
Published: July 2006

A spin trapping technique was applied successfully to the detection and identification of short-lived radicals formed in γ-irradiated aqueous solutions of organic compounds. From an aqueous methanol solution, CH2OH radical is trapped by 2-methyl-2-nitrosopropane. From glycylglycine and glycyl-α-alanine solutions, it is confirmed that hydrogen atoms are abstracted from glycine residues.
EFFECTS OF ALKALI-CATION EXCHANGE ON THE STEREOCHEMISTRY OF β-ELIMINATION OF ALKYL HALIDES OVER SILICA GEL
Authors: Misono Makoto , Aoki Yukio , Yoneda Yukio
Published: July 2006

Dehydrobromination of 2-bromobutane and 2,3-dibromobutane proceeded mainly by anti mode over K- and Cs-exchanged silica gel, but syn mode over silica and Li-silica. Upon re-exchange of K and Cs with proton the steric course returned to syn mode. Role of acid-base properties of solid surface and substrate in controlling the steric course was suggested.
HYDROGEN-BONDED COMPLEX BETWEEN NUCLEOTIDE BASE AND AMINO ACID, CRYSTAL STRUCTURE OF 5-BROMOCYTOSINE: N-TOSYL-l-GLUTAMIC ACID
Authors: Ohki Minoru , Takenaka Akio , Shimanouchi Hirotaka , Sasada Yoshio
Published: July 2006

A new interaction mode between cytosine and the carboxyl side group of amino acid has been found in the crystal of 5-bromocytosine: N-tosyl-l-glutamic acid complex by X-ray analysis.
THE REACTION OF BIS(NITROMETHYL)PREHNITENE WITH AQUEOUS AMMONIA
Authors: Chiba Koji , Endo Eiji , Sakamoto Tokio
Published: July 2006

When bis (nitromethyl) prehnitene (1) was treated with 28% aqueous ammonia at 100°C in a sealed tube, N-hydroxytetramethylphthalimide (6″), 2-cyano-3, 4 ,5, 6-tetramethylbenzoic acid (9″) , tetramethylphthalimide (10″) and 2-hydroxy-3-hydroxyimino-4,5,6,7-tetramethylphthalimidine (5″) were formed as ammonium salts.

It seems that (5″) is initially formed, and then rapidly hydrolyzed to produce 6″, which is finally converted to 10″ via 9″.
CATALYTIC HYDROGENATION OF METHYLCYCLOHEX-2-ENYLAMINES
Authors: Sugi Yoshihiro , Mitsui Sekio
Published: July 2006

A series of methylcyclohex-2-enylamines was hydrogenated using Ni, Pd, and Pt catalysts. The product determining steps were discussed on the basis of the variations of the isomer distribution in the products.
DIELECTRIC BEHAVIOR OF 2-METHYL-2-PROPANOL IN BENZENE AND PYRIDINE SOLUTIONS
Authors: Sato Hiroshi , Koshii Taro , Takahashi Hiroaki , Higasi Keniti
Published: July 2006

The principal relaxation time of 2-methyl-2-propanol decreases with an addition of solvent (benzene and pyridine). The difference in the hydrogen-bonding capacity of the solvent is not so important in this alcohol as 1-butanol and other isomeric butanols.
MAGNETIC CIRCULAR DICHROISM OF SUBSTITUTED BENZENES
Authors: Teramae Norio , Yazawa Kiyozumi , Matsui Tomoko , Tanaka Shigeyuki
Published: July 2006

The magnetic circular dichroism (MCD) spectra of a series of substituted benzenes were measured. The B values of the 1Lb band of these compounds are discussed in terms of the dipole strengths and wave numbers of the 1Lb and 1La bands, and it is concluded that these B values depend mainly on the contribution of the mixing of the above two states.
THE THERMAL CYCLIZATION OF ALKENYLPHENOLS AND ALKENYLANILINES
Authors: Moreau Claude , Rouessac Francis , Beslin Pierre , Conia Jean-Marie
Published: July 2006

In the present paper we report the thermal cyclization of various alkenylphenols in order to investigate the scope and limitations of this reaction. Different experimental conditions were used to elucidate the mechanism.
CRYSTAL STRUCTURE OF REACTIVE SPUTTERED SILVER FILMS AND THERMAL DESORPTION OF OXYGEN FROM THESE FILMS
Authors: Tanaka Sadao , Abe Tetsuya , Yamashina Toshiro
Published: July 2006

The crystal structure and resistivity of silver films sputtered in an oxygen atmosphere and the thermal desorption of oxygen from these films were studied. The sputtered silver films prepared under the oxygen of 1.5×10−4 and 3×10−4 Torr contained very fine fcc silver crystals and Ag2O crystals. The thermal desorption showed that all the reactive sputtered silver films contained a considerable amount of an amorphous phase.
CHARACTERIZATION OF ALTERNARIOLIDE, A HOST-SPECIFIC TOXIN PRODUCED BY ALTERNARIA MALI ROBERTS
Authors: Okuno Toshikatsu , Ishita Yuichi , Sawai Ko , Matsumoto Takeshi
Published: July 2006

Alternariolide, a host-specific toxin responsible for Alternaria blotch of apple, has been characterized as a depsipeptide of the planar formula 1 on the basis of spectroscopic evidence.
A NEW TRANSFORMATION OF AN ESTER INTO ITS HOMOLOG AND AN α-HYDROXYALDEHYDE USING METHYL METHYLTHIOMETHYL SULFOXIDE
Authors: Ogura Katsuyuki , Furukawa Shigeko , Tsughihashi Gen-ichi
Published: July 2006

The carbanion (2) generated from methyl methylthiomethyl sulfoxide (1) reacts with an ester to afford an acylated product (3). This compound can be transformed into derivatives of the corresponding α-hydroxyaldehyde and also into the ester which has one more methylene group than the original ester (Scheme 2).
REACTION OF MIXED CARBOXYLIC ANHYDRIDES WITH GRIGNARD REAGENTS. A USEFUL METHOD FOR THE PREPARATION OF KETONES
Authors: Araki Masashi , Mukaiyama Teruaki
Published: July 2006

It was found that common ketones were prepared in good yields by the reaction of grignard reagents with mixed carboxylic anhydrides composed of o-substituted benzoic acids or pivalic acid and common carboxylic acids at −20 or −78°C. Further, it was established that a 1,4-diketone such as 2,5-dioxoundecane, a precursor of dihydrojasmone was synthesized in 71∼82% yields from levulinic acid by one step procedure without protecting its carbonyl group.
BASE CATALYZED OXYGENATION OF HINDERED PHENOLS. SYNTHESIS OF 4-HYDROXY-5,6-EPOXY-2-CYCLOHEXENONES (EPOXY-p-QUINOLS)
Authors: Nishinaga Akira , Itahara Toshio , Matsuura Teruo
Published: July 2006

Oxygenation of 2,6-di-t-butyl-4-alkylphenols catalyzed by Bu tOK in aprotic solvents has been found newly to form 4-hydroxy-5,6-epoxy-2-cyclohexenones (2) in excellent yield. A mechanism by which 2 is formed envisaging intramolecular participation of the π-system in the degradation of 4-oxo-2,5-cyclohexadienyl peroxide ion (11) primarily formed as transient intermediate is discussed. 2,4-Di-t-butylphenols also gave epoxy-p-quinols in the same system.
RESTRICTED ROTATION INVOLVING THE TETRAHEDRAL CARBON. VIII. ISOLATION OF THREE STABLE ROTAMERS ABOUT AN sp3–sp3 CARBON BOND
Authors: Yamamoto Gaku , Oki Michinori
Published: July 2006

Each of the three possible rotational isomers formed by the rotation about a C–C single bond between the bridgehead tert-alkyl group and the skeleton of dimethyl 2,3-dichloro-9-(1,1-dimethyl-2-phenylethyl)-9,10-dihydro-9,10-ethenoanthracene-11,12-dicarboxylate is isolated. These compounds are found to be very stable at room temperature. Structural assignment is made by the NMR evidence.
BI- AND TRINUCLEAR URANYL COMPLEXES WITH METAL SCHIFF BASE COMPLEXES
Authors: Condorelli Giuseppe , Fragala Ignazio , Giuffrida Salvatore
Published: July 2006

N, N′-1,3-propylene-bis(salicylideneiminato)Cu(II) reacts with some uranyl salts to form bi- and trinuclear complexes. Infrared data show that the “complex ligand” is coordinated to the uranyl ion in the equatorial plane through the phenolic oxygens. Diffuse reflectance spectra suggest a copper(II) environment more distorted from planarity in polynuclear species than the “complex ligand”.
STUDIES ON NUCLEOSIDES AND NUCLEOTIDES. III. SYNTHESIS AND REACTIONS OF 2′,3′-O-(TRIPHENYL)PHOSPHORANYL-O2,5′-CYCLOURIDINE
Authors: Kimura Junji , Fujisawa Yoshiyuki , Sawada Takamichi , Mitsunobu Oyo
Published: July 2006

The reaction of uridine, triphenylphosphine (I) and diethyl azodicarboxylate (II) in THF gave 2′,3′-O-(triphenyl)phosphoranyl-O2,5′-cyclouridine (III). The alkaline or acid hydrolysis of III gave uridine and triphenylphosphine oxide (1:1). The treatment of III in THF-water afforded O2,5′-cyclouridine. The reaction of III with methanol under reflux gave O2-methyluridine.
THE HIGHLY STEREOSELECTIVE SYNTHESIS OF ETHYL GERANATE
Authors: Kobayashi Susumu , Mukaiyama Teruaki
Published: July 2006

The new method for the stereospecific synthesis of trisubstituted olefin was successfully applied to a highly stereoselective synthesis of 1,5-diene unit, demonstrating the preparation of ethyl geranate [3] starting from 3-methyl-2-butenyl bromide [1].
RELATIVE SPIN-LATTICE RELAXATION TIMES OF H-8 AND H-1′ IN PURINE RIBONUCLEOSIDES AND RIBONUCLEOTIDES AS A MEASURE OF SYN OR ANTI CONFORMATION
Authors: Imoto Toshiaki , Akasaka Kazuyuki , Hatano Hiroyuki
Published: July 2006

Proton relaxation measurements with the pulse Fourier transform method have revealed that the spin-lattice relaxation times(T1) of H-8 and H-1′ in purine ribonucleosides and ribonucleotides depend strongly on the syn-anti conformation. The ratio of T1’s for the two protons is shown to be a convenient measure of the syn-anti conformational equilibrium.
THERMAL DECOMPOSITION PROCESS OF Bi2(SO4)3
Authors: Matsuzaki Ryoko , Sofue Atsuko , Masumizu Hagio , Saeki Yuzo
Published: July 2006

Bi2(SO4)3 begins to decompose at 465°C, and the decomposition process of Bi2(SO4)3 can be represented as follows: Bi2(SO4)3\xrightarrow465°CBi2O3·2Bi2(SO4)3\xrightarrow550°C2Bi2O3·Bi2(SO4)3\xrightarrow580°C7Bi2O3·2Bi2(SO4)3\xrightarrow830°C12Bi2O3·Bi2(SO4)3\xrightarrow880°C28Bi2O3·Bi2(SO4)3\xrightarrow920°CBi2O3.
THERMAL ISOMERIZATION OF AN ADDUCT OF TROPONE AND 8-OXOHEPTAFULVENE. A FIRST EXAMPLE OF ANTARAFACIAL [1,7] SIGMATROPIC REARRANGEMENT IN A RIGID SYSTEM
Authors: Morita Noboru , Asao Toyonobu , Kitahara Yoshio
Published: July 2006

Thermal isomerization of (2+8)cycloadducts of tropones and 8-oxoheptafulvene afforded 3-(cyclohexa-2,4-dienyl)-1-oxaazulan-2-ones by antarafacial [1,7] sigmatropic rearrangement which is a first example in a rigid system. An activation energy (21.4 kcal. mol−1) and an entropy of activation (−25.8 e.u.) were obtained for the reaction.
SYNTHESIS OF 13-NORTRICHOTHEC-9(10)-ENE. A MODEL REACTION TOWARD THE TOTAL SYNTHESIS OF TRICHODERMIN
Authors: Masuoka Noriyoshi , Kamikawa Tadao , Kubota Takashi
Published: July 2006

The synthesis of the title compound 20 modelled on the proposed biogenetic scheme is described. The key intermediate 11 has been synthesised by photocycloaddition followed by acid cleavage.
ESR STUDY OF HOT IONS, Ir(II) AND Ir(IV) IN γ-IRRADIATED Ir(III) COMPLEXES
Authors: Fujiwara Shizuo , Watanabe Tokuko , Inoue Takeko
Published: July 2006

ESR study of Ir hot ions produced in γ-irradiated Ir(III) complexes has been carried out. It has been found that Ir(II) hot ions take d7 configuration of low spin state. The unpaired electron is localized in d3z2−r2 orbital in the elongated octahedral structure. Ir(IV) hot ions are found to be formed in irradiated Ir(III) hexachloro complexes.
THE ACTION MODEL OF TYROSINASE. DIRECT OXIDATION OF 2-ANTHRANOL TO 1,2-ANTHRAQUINONE SPECIFICALLY CATALYZED BY CUPRIC ION
Authors: Iwata Masaaki , Emoto Sakae
Published: July 2006

L’oxydation directe par oxygène moleéculaire des anthranols-2 aux anthraquinones-1,2 est étudiée. La réaction est spécifiquement catalysée par l’ion cuivrique. L’addition d’une molécule d’imidazole par atome de cuivre augmente énormemént la Vitesse initiale de la réaction.
PHOTOCHEMICAL METHYLATION OF INORGANIC MERCURY IN THE PRESENCE OF SOLID SULFUR
Authors: Akagi Hirokatsu , Takabatake Eigo , Fujita Yuzaburo
Published: July 2006

The photosensitized methylation of inorganic mercury in the presence of solid sulfur was investigated in an aqueous acetic acid solution of mercuric acetate. It was found that the photooxidation of sulfur into sulfate ions coupled with the reduction of mercuric ions and the resulting sulfate ions reacted with mercuric acetate to produce basic mercuric sulfate, a yellow precipitate, which acted as an effective photosensitizer for the methylation.
STUDIES OF ENAMINES. VI. THE ADDITIONS OF PYRROLE AND PYRAZOLE TO ENAMINES
Authors: Tsuge Otohiko , Tashiro Masashi , Kiryu Yoko (née Nishihara)
Published: July 2006

Enamines derived from cyclohexanone, propionaldehyde, and n-butyraidehyde and secondary amines react with pyrrole and pyrazole, affording new Michael type adducts respectively.
AN EARLY STAGE CARBONIZATION PROCESS OF POLYVINYL CHLORIDE
Authors: Kamo Mutsukazu , Kanda Hisao , Sato Yoichiro , Setaka Nobuo
Published: July 2006

The cluster-like hydrocarbons characteristic of the pitch prepared from polyvinyl chloride at 400°C were not observed in the pitch prepared at 415°C. A reaction process in the early stage carbonization of the compound is proposed.
PHOTOCHEMICAL LIGAND SUBSTITUTION IN HEXAKIS(PHENYL ISOCYANIDE)CHROMIUM(O)-OLEFIN SYSTEMS
Authors: Iuchi Kazuhito , Asada Shintaro , Sugimori Akira
Published: July 2006

Dimethyl fumarate and fumaronitrile undergo photochemical ligand substitution toward hexakis(phenyl isocyanide)chromium(O). The coodinated dimethyl fumarate is eliminated in the dark without accompanying trans–cis isomerization. Dimethyl maleate, the cis-isomer, does not undergo this type of photoreaction.
STEREOSELECTIVE SYNTHESIS OF 3-C- AND 5-C-METHYL-α-d-GLUCOFURANOSE DERIVATIVES AND THEIR DIASTEREOMERS
Authors: Funabashi Masuo , Sato Haruo , Yoshimura Juji
Published: July 2006

The title compounds were stereoselectively prepared from 3-C-methylene-α-d-ribo- and 5-C-methylene-α-d-xylo-hexofuranose derivatives by successive epoxidation and reduction, and from corresponding 3- and 5-uloses by the Grignard reaction, respectively.
RESTRICTED ROTATION IN 5-NITROSOTROPOLONE AND THE ANION RADICAL
Authors: Ikegami Yusaku , Asao Toyonobu
Published: July 2006

The ESR study of the 5-nitrosotropolonate anion radical generated electrolytically in N,N-dimethylformamide elucidated the restricted rotation around the C–N bond. The free energy of activation ΔG≠ for the rotation of 5-nitrosotropolone was estimated by the NMR study to be 16.5 kcal·mol−1 in dimethylsulfoxide.
TEMPERATURE-INDEPENDENT DELAYED FLUORESCENCE IN BIPHENYL HOST: A RE-EXAMINATION OF ACTIVATION ENERGY
Authors: Kusumoto Yoshihumi , Gondo Yasuhiko , Kanda Yoshiya
Published: July 2006

The delayed fluorescence observed in the mixed crystals of benzo(f)quinoline in biphenyl host has been found to be independent of temperature in the low-temperature region from 90°K down to liquid helium temperature, and subtraction of this temperature-independent contribution gave straight-line fits of the log IDF/IP2-vs-l/T plots over the whole temperature range studied. In addition, some remarks have been made on the concentration effect.
THREE NEW DITERPENOIDS, JOLKINOLIDES C, D, AND E, ISOLATED FROM EUPHORBIA JOLKINI BOISS. (EUPHORBIACEAE)
Authors: Uemura Daisuke , Hirata Yoshimasa
Published: July 2006

Further investigation of constituents in title plants gave three new diterpenoids, named jolkinolides C, D, and E. In this report structural elucidation of those compounds was described.
THERMAL ELECTRON TRANSFER REACTION OF SOME BIGUANIDE–COBALT(III) COMPLEXES IN SOLID PHASE
Authors: Tsuchiya Ryokichi , Uehara Akira , Otsuka Kenji , Kyuno Eishin
Published: July 2006

The thermal reduction from Co(III) to Co(II) in the biguanide mixed complexes, trans-[Co(CH3NH2)2(bgH)2]Br3·H2O and trans-[Co(py)2-(bgH)2]ClBr22.5H2O, was investigated in solid phase. These Co(III) octahedral complexes were found to undergo an electron transfer and converted to Co(II) square–planar complexes upon heating retaining the metal–biguanide bonds.
A MÖSSBAUER SPECTROSCOPIC STUDY OF INTERCALATION COMPOUNDS OF GRAPHITE WITH FERRIC CHLORIDE AND ALUMINUM CHLORIDE
Authors: Tominaga Takeshi , Sakai Takuhiko , Kimura Tomohiko
Published: July 2006

The Mössbauer spectra of graphite-FeCl3 and graphite-FeCl3–AlCl3 compounds with varying FeCl3/AlCl3 ratio were measured at 80°K and 298°K. In the spectra of the latter compounds with FeCl3/AlCl3 ratio of approximately one and less were observed two quadrupole doublets indicating the presence of high-spin Fe(II).
5-(3-HYDROXYPROPYL)-2-(3′,-4′-METHYLENEDIOXYPHENYL)BENZOFURAN: A NEW BENZOFURAN FROM STYRAX OBASSIA SIEB. ET ZUCC.
Authors: Takanashi Masahide , Takizawa Yasuomi , Mitsuhashi Tatsuo
Published: July 2006

A new benzofuran derivative was isolated from the seed-oil of Styrax obassia Sieb. et Zucc., and the structure was determined as 5-(3-hydroxypropyl)-2-(3′, 4′-methylenedioxyphenyl)benzofuran.
AN ELECTRON SPIN RESONANCE STUDY OF A BRIDGEHEAD SILYL RADICAL
Authors: Sakurai Hideki , Ogi Katsumi , Hosomi Akira , Kira Mitsuo
Published: July 2006

Electron spin resonance spectrum of the bicyclo[2. 2. 2]-1-silaoctyl radical revealed β-, γ, and δ-hydrogen coupling constants to be 1.53, 0.37, and 0. 37 G, respectively. The small β-hydrogen coupling constant is ascribed to the pyramidal structure of the bridgehead silyl radical site.
POTENTIAL VARIATION AT THE SEMICONDUCTOR-ELECTROLYTE INTERFACE THROUGH A CHANGE IN pH OF THE SOLUTION
Authors: Watanabe Tadashi , Fujishima Akira , Honda Ken-ichi
Published: July 2006

Flatband potentials of n-type TiO2 and CdS single crystal electrodes have been measured as a function of the pH of the electrolyte solution. The potential drop across the electrical double layer at the TiO2 electrode surface was found to depend regularly on the solution pH, while that of CdS remained constant in the pH range from 2 to 13.
PHASE EQUILIBRIA IN THE V2O4–V2O5 SYSTEM AT TEMPERATURES FROM 500° TO 651°C
Authors: Endo Hozumi , Wakihara Masataka , Taniguchi Masao
Published: July 2006

The standard free energies (Δ G°) for V2O4 oxidation according to the following consecutive reaction

V2O4→V6O13→V3O7→V2O5

have been determined precisely on the basis of equilibrium oxygen pressure at 651°C. The standard free energy change for the reaction

2V3O7+1⁄2O2=3V2O5

can be expressed by Δ GR°=−12,271+2.57 T (500 – 651°C) ± 1340 cal.
THE PHOTOCONDUCTIVITY OF 1,5-DIACETYLANTHRACENE
Authors: Sugimoto Akira , Aoki Tadaaki , Inoue Hiroo , Imoto Eiji
Published: July 2006

1,5-Diacetylanthracene shows the anomalous photocurrent in the threshold region of the absorption spectrum when the evaporated film of 1,5-diacetylanthracene is irradiated with monochromatic light at various wavelengths under a nitrogen atmosphere.
THE CHEMICAL MODEL FOR THE CLASS II ALDOLASE. CUPRIC-ION CATALYZED ALDOL CONDENSATION OF AROMATIC ALDEHYDES WITH ACETONE
Authors: Iwata Masaaki , Emoto Sakae
Published: July 2006

The aldol condensation of several aromatic aldehydes with acetone was specifically catalyzed by cupric ion and the additional effect of zinc ion on the cupric-ion catalyzed condensation was substantiated.
ENERGY AND MASS DEPENDENCE OF THE PRODUCT YIELDS IN THE REACTION OF METHANOL WITH ACCELERATED INERT GAS IONS
Authors: Arai Eiichi , Takahasi Makoto
Published: July 2006

Ion impact reaction of methanol was studied with accelerated inert gas ions with initial energy from 2–6 kV. It is shown that the yields are linear vs. lnEi, and the ratio of the average logarithmic energy loss to the reaction probability (α⁄pj) was determined. The dependence of α on mass of the projectile ion is discussed.
COLOR REACTION OF HEAVIER RARE EARTHS WITH CHLOROPHOSPHONAZO III
Authors: Taketatsu Tomitsugu , Kono Noriko
Published: July 2006

In absorption spectra of heavier rare earth (Gd to Lu) chelates of Chlorophosphonazo III, the absorption bands extend from 700 to 800 nm with a maximum at approximately 745 nm. The intensity of these bands increases with an increase in the mole ratio of the metal to the reagent and in the atomic number. Also it depends upon the pH value and the elapsing time. The corresponding chelates of lighter rare earths (La to Eu) do not exhibit a similar maximum under the same conditions.
CATALYTIC POLAROGRAPHIC REDUCTION OF NITRATE ION IN THE PRESENCE OF IRON(II) AND IODATE AT DROPPING MERCURY ELECTRODE
Authors: Saito Atsuyoshi , Himeno Sadayuki
Published: July 2006

Polarographic reduction of nitrate took place in the ascending branch of an Fe(II) reduction wave in an unbuffered solution (pH 4–6) of a supporting electrolyte that contained iodate. In the potential region of reducing nitrate, the current varied periodically of which the period depended on the experimental condition.
A COMBINATION OF SODIUM BOROHYDRIDE WITH ANILIDES AS A NEW REAGENT FOR ESTER REDUCTION
Authors: Kikugawa Yasuo
Published: July 2006

Sodium anilidoborohydrides were synthesized from sodium borohydride and anilides in α -picoline, and these compounds were found to be useful reagents for facile reduction of esters.
A STEREOSELECTIVE SYNTHESIS OF (Z,E)-9,11-TETRADECADIENYL-1-ACETATE, A MAJOR COMPONENT OF THE SEX PHEROMONE OF SPODOPTERA LITURA
Authors: Goto Giichi , Shima Takashi , Masuya Hirotomo , Masuoka Yutaka , Hiraga Kentaro
Published: July 2006

Wittig reaction of 9-acetoxynonyl-triphenylphosphonium bromide (7) with (E)-2-pentenal (8) gave stereoselectively (85–90%) (Z,E)-9,11-tetradecadienyl-1-acetate (1) together with a small amount of the (E,E)-isomer (6) which was removed from the mixture by the formation of the Diels-Alder adduct (13) with tetracyanoethylene. In contrast, Wittig reaction of (E)-2-pentenyl-triphenylphosphonium bromide (3) with 9-acetoxynonyl aldehyde (5) afforded a mixture of 1 and 6.
A NEW ROUTE TO 3,7-DIMETHYL-2,6-OCTADIEN-1-OL AND 3,7-DIMETHYL-2-OCTENE-1,7-DIOL FROM ISOPRENE
Authors: Takabe Kunihiko , Katagiri Takao , Tanaka Juntaro
Published: July 2006

A convenient synthetic method for 3,7-dimethyl-2,6-octadien-1-ol (1) (geraniol and nerol) and 3,7-dimethyl-2-octene-1,7-diol (2), involving the anionic telomerization of isoprene and the rearrangement of amine oxide was established. The overall yields of (1) and (2) (E/Z ratio=2) from isoprene were 61 and 44%, respectively.
THE PREPARATION OF TRIPHENYLLEAD AROMATIC DITHIOCARBOXYLATES, AND THEIR REACTIONS WITH METAL ALKOXIDES. NEW SYNTHESIS OF THION ESTERS
Authors: Katada Tomonori , Kato Shinzi , Mizuta Masateru
Published: July 2006

Some crystalline triphenyllead aromatic dithiocarboxylates [ArCS2PbPh3] have been prepared in good yields. Treatment of these esters with metal alkoxides gave thion esters in fair to good yields.
SYNTHESIS OF ARYLTHIODIMETHYLSULFONIUM SALTS AND THEIR REACTIONS WITH NUCLEOPHILES
Authors: Minato Hiroshi , Miura Takashi , Kobayashi Michio
Published: July 2006

Arylthiodimethylsulfonium perchlorates (1) are prepared from arenesulfenyl chloride, methyl sulfide and silver perchlorate. The reactions of 1 with benzyl methyl sulfide, sodium methoxide, anisole, and 2,6-di-t-butylphenol are investigated, and all these nucleophiles attack 1 at its sulfide sulfur atom. The reactivity of 1 is compared with those of anilinosulfonium ion and phenoxysulfonium ion.
PROTON MAGNETIC RESONANCE SPECTRA OF METAL AMMINE COMPLEXES. V. THE TRANS-EFFECT IN COBALT(III) AMMINES AS EVIDENCED BY THE RATE OF ISOTOPIC DEUTERIUM EXCHANGE
Authors: Yoneda Hayami , Sakaguchi Ushio , Maeda Koichi
Published: July 2006

The rate of hydrogen exchange has been measured on cobalt(III) ammines and found to reflect the trans-effect. We confirmed that large inductive effects of CN− and, in some cases, NO2− offset the effect of the magnetic anisotropy of cobalt, which accounts for ammine proton chemical shifts in most complexes.
NITROGEN-15 CHEMICAL SHIFTS IN METAL-AMMINE COMPLEXES. I. PENTAAMMINECOBALT(III) COMPLEXES
Authors: Nakashima Yoshiaki , Muto Masayuki , Takagi Ichiro , Kawano Keiichi
Published: July 2006

Nitrogen-15 chemical shifts have been measured directly for [CoX(NH3)5]n+(X=NH3,H2O,Br− and NO2−). The chemical shifts induced by paramagnetic anisotropy of Co(III) ion are of minor importance to the 15N chemical shifts, in contrast with the previous result that they are of dominant importance to the 1H chemical shifts in the same substances. According to the change of X, the 15N chemical shifts of NH3 trans and cis to X show different values.
A CONVENIENT SYNTHESIS OF 1,3-BENZODITHIOLYLIUM FLUOROBORATE
Authors: Nakayama Jyuzo , Fujiwara Kazuo , Hoshino Masamatsu
Published: July 2006

1,3-Benzodithiolylium fluoroborate (I) was synthesized in excellent yields by the action of hydrofluoroboric acid on 2-alkoxy- and 2-alkylthio-1,3-benzodithioles and by the action of trityl fluoroborate on 1,3-benzodithiole (VI). The fluoroborate I reacted with cycloheptatriene to give tropylium fluoroborate and VI.
SUBSTRATE SPECIFICITY OF GERANYLGERANYL PYROPHOSPHATE SYNTHETASE
Authors: Shinka Toshihiro , Ogura Kyozo , Seto Shuichi
Published: July 2006

The trans isomers of 3-methyl-2-octenyl, 3-methyl-2-nonenyl, 3-methyl-2-decenyl, 3-methyl-2-undecenyl, and 3-methyl-2-dodecenyl pyrophosphates were found to act as artificial substrates for geranylgeranyl pyrophosphate synthetase of Micrococcus lysodeikticus.
CRYSTAL STRUCTURE OF K7[NiIVV13O38]·18H2O
Authors: Kobayashi Akiko , Sasaki Yukiyoshi
Published: July 2006

K7[NiIVV13O38]·18H2O is orthorhombic: space group I4⁄mmm, Z=2, a=11.37(1), c=19.56(1) Å. On Fourier projection maps, a discrete polyanion with an apparent point symmetry of D4h was found. But it was realized that this electron density image was yielded by the random orientation of the polyanion NiV13O384− which consists of one NiIVO6 and 13VO6 octahedra sharing edges.
A NOVEL METHOD FOR THE PREPARATION OF VARIOUS 2-PYRIDYL SULFIDES FROM ALCOHOLS
Authors: Mukaiyama Teruaki , Ikeda Shigeru , Kobayashi Susumu
Published: July 2006

1-Methyl-2-alkoxypyridinium salts, easily formed in situ from l-methyl-2-fluoropyridinium salt and alcohols, react with pyrid-2-thione in the presence of triethylamine to give the corresponding 2-pyridyl sulfides in good yields.
THE CRYSTAL STRUCTURE OF AMMONIUM DODECAMOLYBDOTETRAARSENATE(V) TETRAHYDRATE,(NH4)4 H4As4Mo12O50·4H2O
Authors: Nishikawa Toshihiro , Sasaki Yukiyoshi
Published: July 2006

(NH4)4H4As4Mo12O50·4H2O is tetragonal: space group P42/nnm, Z = 2, a = 11.923 (3), c = 17.564 (2) Å. The crystal contains a discrete polyanion, H4As4Mo12O504− of a Td point symmetry, consisting of four trigonal Mo3O13 groups. They are bound each other at six oxygen atoms, four AsO4 tetrahedra are attached from outside of the Mo12O46 cage. There is an empty cavity of the radius of 1.43 Å at the center of the polyanion.
RING CLEAVAGE REACTION OP CERTAIN 5,6-DIHALO-2-NORBORNENE OXIDES
Authors: Yanagida Yuji , Sakon Yutaka , Nomura Masakatsu , Kikkawa Shoichi
Published: July 2006

Ring cleavage reaction of trans- and endo-cis-5,6-dichlo (or dibromo)-2-norbornene oxides by hydrogen halides have been investigated. Normal trans addition products of hydrogen halides to the epoxide ring were obtained in the case of trans-5,6-dihalonorbornene oxides, while the cleavage reaction of endo-5,6-dihalonorbornene oxides gave the halohydrins which experienced transannuler shift of endo halogen substituent toward the resulting carbonium ion.
PRODUCTS AND MODES OF PHOTOCYCLOADDITION OF 9,10-PHENANTHRAQUINONE WITH CYCLIC OLEFINS
Authors: Maruyama Kazuhiro , Iwai Tatsuaki , Naruta Yoshinori
Published: July 2006

Photocycioaddition of 9,10-phenanthraquinone(PQ) and cyclic olefins; cyclohexene(1a), cycloheptene(1b), cis-cyclooctene(1c), and bicyclo[2.2.1]hept-2-ene(2) was investigated. It was found that the product distributions and the modes of photocycloaddition were profoundly dependent on the structure of cyclic olefins.
REDUCTIVE DEHALOGENATION OF α-HALO KETONES WITH BENZENETHIOL CATALYZED BY IRON-POLYPHTHALOCYANINE
Authors: Inoue Hiroo , Hata Hiroyuki , Imoto Eiji
Published: July 2006

It is found that α-halo ketones are reduced with benzenethiol in the presence of iron-polyphthalocyanine to the parent ketones, although they are not reduced in the absence of iron-polyphthalocyanine. The iron-polyphthalocyanine appears to serve as an electron-transfer catalyst for the reductive dehalogenation.
SYNTHESIS OF 5-(3-HYDROXYPROPYL)-2-(3′,4′-METHYLENEDIOXYPHENYL) BENZOFURAN AND RELATED STYRAX EXTRACTIVES
Authors: Schreiber Fred G , Stevenson Robert
Published: July 2006

Short procedures for the synthesis of the lignans (egonol, homo-egonol and the title compound) which are constituents of various Styrax species are reported.
CHELATE PHOSPHORUS YLIDE COMPLEXES OF PALLADIUM AND PLATINUM
Authors: Oosawa Yoshinao , Saito Taro , Sasaki Yukiyoshi
Published: July 2006

Several bidentate phosphorus ylide ligands of the type Ph2P–(CH2)n–P+(Ph2)–C−H–C(O)–R (n = 1, R = Ph; n = 2, R = CH3, OCH3) and their complexes of palladium(II) and platinum(II) chlorides have been synthesized and characterized.
STEREOCHEMICAL STUDIES OF THE ELECTROLYTIC REACTIONS OF ORGANIC COMPOUNDS I. ELECTROLYTIC REDUCTIONS OF AROMATIC DIKETONES
Authors: Nonaka Tsutomu , Udagawa Akio , Odo Keijiro
Published: July 2006

The electrolytic reductions of some aromatic diketones were carried out by means of controlled potential electrolysis in various catholytes. Reduction products were intramolecular pinacols (cis and trans cyclic vicinal diols), intermolecular pinacol, and/or hydrol. The formation ratios of the products were strongly dependent on the molecular structure of diketone, the pH of catholyte, and/or the kind of organic co-solvent.
FACILE FLUORINATION OF PHENANTHRENE BY XENON DIFLUORIDE: VERSATILE SUBSTITUTION AND ADDITION, WITHOUT HYDROGEN FLUORIDE INITIATION
Authors: Agranat Israel , Rabinovitz Mordecai , Selig Henry , Lin Chun-Hsu
Published: July 2006

Phenanthrene reacts with xenon difluoride without HF initiation and in an open system to give fluorine substitution and addition products; 9-fluorophenanthrene is isolated in 33% yield.
PROTON AND CHLORINE SPIN-LATTICE RELAXATION IN α-NH4HgCl3
Authors: Sagisawa Kenshô , Kiriyama Hideko , Kiriyama Ryôiti
Published: July 2006

The spin-lattice relaxation times of 1H and 35Cl as well as the 35Cl NQR frequencies in α-NH4HgCl3 are reported. The proton T1 data are explained in terms of C3 reorientation and S4 flip of NH4+ ions. The latter mode is also largely responsible for the 35Cl quadrupole relaxation rate. A marked change in the proton T1 at 55 K indicates a phase transition, ascribable to the ordering of the NH4+ ions.
SPECTRAL SENSITIZATION OF PHOTO-ELECTROCHEMICAL REACTIONS OF CADMIUM SULFIDE SINGLE CRYSTAL ELECTRODE
Authors: Fujishima Akira , Watanabe Tadashi , Tatsuoki Osamu , Honda Kenichi
Published: July 2006

The spectral sensitization of photo-electrochemical reactions of cadmium sulfide single crystal electrode with rhodamine B and quinocyanine has been investigated. The photosensitive region of the electrode could be extended to longer wavelength by addition of each dye into the electrolyte solution.
EM, ED AND EMX STUDIES ON MOLYBDENUM OXIDE USED AS A CATALYST
Authors: Sotani Noriyuki , Hasegawa Masatomo
Published: July 2006

The needles appeared at the end of the crystal of molybdenum oxide used as a catalyst for hydrodesulfurization for 10 min at 350°C. They gradually grew and apparently stopped to grow after the 40 min reaction. The needles were produced in the presence of thiophene. They gave the ED pattern due to MoO2. Also the catalyst was sulfurized uniformly all over the surface.
OPTICAL ACTIVATION METHOD FOR RACEMIC α-SUBSTITUTED CARBONYL COMPOUNDS
Authors: Matsushita Hajime , Noguchi Masao , Yoshikawa Sadao
Published: July 2006

The optical activation of racemic α-substituted carbonyl compounds by the hydrolysis of enamines with optically active α-pipecoline was reported. Solvent effect on the optical activation was also examined.
TEMPERATURE DEPENDENCE OF THE 35Cl NQR FREQUENCIES OF SOME TRICHLOROACETATES
Authors: Hashimoto Masao
Published: July 2006

The 35Cl NQR frequencies of magnesium trichloroacetate hexahydrate, sodium trichloroacetate trihydrate, and anhydrous sodium trichloroacetate were measured in the temperature region of 77–230 K. It was found that each of the two hydrated salts contains two thermally different non-equivalent trichloromethyl groups. The non-equivalence may be due to some intermolecular interaction.
REACTIONS OF ALKYLMAGNESIUM HALIDES AND ALKYLLITHIUMS WITH SELENIUM DIOXIDE. A NEW ROUTE TO DIALKYL SELENIDE
Authors: Arase Akira , Masuda Yuzuru
Published: July 2006

Alkylmagnesium halides and alkyllithiums reacted with selenium dioxide, suspended in tetrahydrofuran, to afford dialkyl selenides in 30–62 % yields.
A CONVENIENT METHOD FOR THE PREPARATION OF δ-HYDROXY-β-KETOESTERS AND 6-ALKYL-5,6-DIHYDRO-4-HYDROXY-2-PYRONES. APPLICATION TO THE SYNTHESES OF KAWAIN AND DIHYDROKAWAIN
Authors: Izawa Toshio , Mukaiyama Teruaki
Published: July 2006

δ-Hydroxy-β-ketoesters[3] and 6-alkyl-5, 6-dihydro–4-hydroxy-2-pyrones[4] were obtained in good yields by TiCl4-promoted addition of diketene[1] to various aldehydes[2], followed by the treatment with alcohol. The hydroxyketoesters[3] were easily lactonized to the corresponding lactones[4] in excellent yields by the hydrolysis with aqueous alkali, followed by acidification. The present method was successfully applied to the syntheses of dihydrokawain[7c] and kawain[7d].
THE FORMATION OF SILYLRHODIUM COMPLEXES BY OXIDATIVE ADDITION OF HYDROSILANES TO HYDRIDOTETRAKIS(TRIPHENYLPHOSPHINE) RHODIUM(I). A HOMOGENEOUS CATALYST FOR HYDROSILATION
Authors: Kono Hiromichi , Wakao Naofumi , Ojima Iwao , Nagai Yoichiro
Published: July 2006

Hydrosilanes react with RhH(PPh3)4 to give RhH2(SiR3)(PPh3)4−n (n=2 or 3) where R3= PhMe2, Ph(MeO)2, (MeO)3, (EtO)3, and Et2H. These complexes were characterized by ir, nmr and elemental analyses. RhH(PPh3)4 was found to be an effective catalyst for hydrosilation of l-alkene, styrene, allyl chloride, isoprene, 2,5-dihydrofuran, acrylonitrile and vinyl acetate.
REACTIONS OF A STABLE FREE NITROGEN-CENTERED RADICAL, 3,4-DIHYDRO-2,4,6-TRIPHENYL-1,2,4,5-TETRAZIN-1(2H)-YL, WITH GRIGNARD REAGENTS
Authors: Miura Yozo , Morimoto Yuzo , Kinoshita Masayoshi
Published: July 2006

Reactions of 3,4-dihydro-2,4,6-triphenyl-1,2,4,5-tetrazin-1(2H)-yl with Grignard reagents have been investigated, and these reactions have been found to proceed through a bimolecular homolytic substitution process.
PHOTOREACTIONS OF SILYL ENOL ETHERS OF α-TETRALONE AND α-INDANONE WITH ELECTRON DEFICIENT OLEFINS; THE PHOTO-MICHAEL REACTION
Authors: Mizuno Kazuhiko , Okamoto Hisanori , Pac Chyongjin , Sakurai Hiroshi , Murai Shinji , Sonoda Noboru
Published: July 2006

Michler’s ketone-sensitized photoreactions of silyl enol ethers of α-tetralone and α-indanone with electron deficient olefins gave photocycloadducts, hydrolyses of which lead to the Michael adducts of the corresponding ketones in good yields, under very mild conditions.
BIOSYNTHESIS OF ISOPRENOID FROM AMINO ACID IN HIGHER PLANT. INCORPORATION OF l-LEUCINE AND l-VALINE INTO GERANIOL AND CITRONELLOL
Authors: Suga Takayuki , Hirata Toshifumi , Tange Keiji
Published: July 2006

l-[U–14C]Leucine and l-[U–14C]valine were incorporated into geraniol (II) and citronellol (III) in Pelargonium roseum Bourbon. The labeling pattern demonstrated that in the higher plant some of the 3,3-dimethylallyl pyrophosphates originate from leucine and valine, not via the mevalonoid pathway, but by some alternate route.
CATALYTIC VAPOR PHASE HYDROFORELATION OF OLEFINS OVER POLYMER-IMMOBILIZED RHODIUM COMPLEXES
Authors: Arai Hiromichi , Kaneko Takashi , Kunugi Taiseki
Published: July 2006

The rhodium complex (–RhCl(CO)2) coordinatively bonded to the phosphine group on polystyrene coated over silica gel is an efficient catalyst for hydroformylation of olefins at 100°C at 1 atm in vapor phase. The rate expression of propionaldehyde formation was R = k[H2][C2H4][CO]−0.5.
OXYGENATION OF 3-SUBSTITUTED INDOLES CATALYZED BY Co(II)-SCHIFF′S BASE COMPLEXES. A MODEL CATALYTIC OXYGENATION FOR TRYPTOPHAN 2,3-DIOXYGENASE
Authors: Nishinaga Akira
Published: July 2006

Bis(salicylidene)ethylenediaminatocobalt(II) catalyzes the oxygenation of 3-substituted indoles related to tryptophan in methanol giving rise to oxidative cleavage of the heterocyclic ring of the indoles selectively to give the corresponding o-formylaminoacetophenone derivatives. This provides a nonenzymic model for the reaction of tryptophan 2,3-dioxygenase. Oxidizability of the substrates is correlated with their donor ability.
MICROWAVE SPECTROSCOPIC STUDY ON THE MECHANISM OF BASE-CATALYZED PROPYLENE H-D EXCHANGE REACTION OVER POTASSIUM tert-BUTOXIDE AND DMSO-d6 SYSTEM
Authors: Uchida Kiyoshi , Naito Shuichi , Onishi Takaharu , Tamaru Kenzi
Published: July 2006

The mechanism of hydrogen exchange reaction between propylene and deuterated dimethyl sulfoxide (DMSO-d6) in the presence of potassium t-butoxide (t-BuOK) was studied by means of microwave spectroscopy, which leads to a conclusion that the reaction proceeds via the π-allyl intermediate.
THERMAL REARRANGEMENT OF 1-ACYL-2-ALKYL-6-HYDROXYFULVENES TO 1-ACYL-3-ALKYL-6-HYDROXYFULVENES
Authors: Kasai Masaji , Funamizu Makoto , Fujita Kenichi , Kitahara Yoshio
Published: July 2006

1-Acyl-2-alkyl-6-hydroxyfulvenes have been found to rearrange to 1-acyl-3-alkyl-6-hydroxyfulvenes on heating. Kinetics and other mechanistic studies including 13C-labeling experiment indicate that the acyl group migrates intramolecularly. The acyl migration may proceed by two consecutive [1,5] acyl shifts via a 5,5-diacylcyclopentadiene toward the less crowded 3-alkyl isomer.
CYCLIZATION OF POLYENES XIII. INTRAMOLECULAR ACYLATION OF GERANIC AND FARNESIC ACID CHLORIDES
Authors: Kobayashi Toyohiko , Kumazawa Satoru , Kato Tadahiro , Kitahara Yoshio
Published: July 2006

Intramolecular acylation reaction took place easily when geranic and farnesic acid chlorides (IV and VII) were treated with AlCl3 or SnCl4, affording the cyclohexenone derivatives in fairly good yields. These as well as our previous results promise the usefulness of the acylation reaction of polyenes for the construction of some kinds of terpenoid skeleton.
REACTIONS OF SULFINATES AND SULFOXYLATES WITH METHYL HALOSULFONATES AND TRIFLUOROMETHANESULFONATE. EVIDENCE FOR THE FORMATION OF DIALKOXYSULFONIUM IONS
Authors: Minato Hiroshi , Yamaguchi Kei , Kobayashi Michio
Published: July 2006

Dialkoxysulfonium ions were prepared by methylation of sulfinates and sulfoxylates.
STRUCTURE AND SYNTHESIS OF ACTIVE COMPONENT FROM A MARINE ALGA, SARGASSUM TORTILE, WHICH INDUCES THE SETTLING OF SWIMMING LARVAE OF CORYNE UCHIDAI
Authors: Kato Tadahiro , Kumanireng Antonius S , Ichinose Isao , Kitahara Yoshio , Kakinuma Yoshiko , Kato Yoshiaki
Published: July 2006

Based on the observation that the juice of yoremoku induces the settling of swimming larvae of Coryne Uchidai, we searched the active component in the alga by means of bioassay using the swimming larvae and elucidated the structure of the active principle to be 1 and 2. The structure was unequivocally confirmed by synthesis and (±)-epoxide (2) exhibited the clear activity toward the settling of swimming larvae.
SYNTHESIS AND REACTION OF NEW TYPE I–N YLIDE, N-TOSYLIMINOIODINANE
Authors: Yamada Yorinobu , Yamamoto Tamotsu , Okawara Makoto
Published: July 2006

(Diacetoxyiodo)arene reacts with p-toluenesulfonamide in the presence of base to give the new type I–N ylide, N-tosyliminoaryliodinane. In the decomposition of this ylide, the nitrene intermediate is proposed to be formed and react with nucleophiles to afford the imine compounds.
NMR STUDY ON THE COMPETITIVE INCLUSION OF SUBSTRATE AND DETERGENT INTO CYCLOHEPTAAMYLOSE CAVITY
Authors: Sunamoto Junzo , Okamoto Hiroshi , Taira Kazunari , Murakami Yukito
Published: July 2006

The hydrolyses of 4-nitrophenyl and 2,4-dinitrophenyl sulfates have been accelerated in the presence of a functional detergent such as N,N-dimethylhexadecylamine or N,N-dimethyl-N-hexadecyl-N-(4-imidazolium)methylammonium dichloride even at concentrations below cmc, as well as in the presence of cycloheptaamylose (β-CD). Nevertheless, the presence of both β-CD and functional detergent resulted in the diminished rate of hydrolysis of the esters relative to the individual catalysis. Through NMR study on the inclusion behavior of the detergent into the β-CD cavity, the inhibiting effect of β-CD in the hydrolysis of aryl sulfates catalyzed by the functional detergents was ascribed to the competitive inclusion of the substrate and detergent molecules into β-CD.
MIXED VALENCE, SEMICONDUCTING FERROCENE-CONTAINING POLYMERS
Authors: PittmanJr Charles U , Sasaki Yukihiko , Mukherjee Tapan K
Published: July 2006

Both conjugated and nonconjugated ferrocene polymers were partially oxidized by DDQ, TCNQ, and I2 to give mixed valence semiconducting polymers.
CHARGE TRANSFER COMPLEX OF POLY-γ-(β-N-CARBAZOLYLETHYL)-d-GLUTAMATE
Authors: Nomori Hiroyuki , Enomoto Takamichi , Hatano Masahiro
Published: July 2006

Two charge transfer absorption bands at 485 nm and 620 nm were observed in the system of poly-γ-(β-N-carbazolylethyl)-d-glutamate-tetranitrofluorenone dissolved in ethylene dichloride. Thermodynamic analysis and circular dichroism measurements revealed that ordering of the side chain carbazolyl chromophore occurred resulting in reordering of the α-helix main chain which had been disturbed by steric hindrance between the side chains.
A NEW TYPE OF PHOTOSENSITIZED REACTION INDUCED BY VISIBLE LIGHT ON THE SOLID SURFACE: THE PHOTOCHEMICAL REACTION OF HETEROCYCLIC N-OXIDE BY GREEN LIGHT IRRADIATION
Authors: Hata Norisuke
Published: July 2006

When the alumina powder dyed with eosin suspended in a benzene solution of isoquinoline- or acridine-N-oxide was illuminated with green light (∼540 nm), there occured reactions originated from the T1 state of isoquinoline N-oxide or from both the S1 and T1 states of acridine N-oxide. The results appear to be accounted for by assuming as a primary act the transfer of an electron from the excited singlet eosin to the alumina conduction band and/or the T–T transfer between the triplet eosin and the N-oxide on the alumina surface.
A NEW ROUTE TO DIALKYL SELENIDE FROM OLEFIN VIA HYDROBORATION
Authors: Arase Akira , Masuda Yuzuru
Published: July 2006

The reaction of trialkylboranes, prepared from olefin via hydroboration, with selenium dioxide was studied. In the aqueous selenium dioxide solution, trialkylboranes give the mixtures of dialkyl selenide and dialkyl diselenide, whereas in the suspension of selenium dioxide in tetrahydrofuran, trialkylboranes give dialkyl selenides selectively under the condition where the reaction time and the amount of selenium dioxide are controlled.
A NOVEL SYNTHESIS OF l-CARVONE FROM l-α-PINENE
Authors: Shono Tatsuya , Nishiguchi Ikuzo , Yokoyama Tsunenori , Nitta Masahiro
Published: July 2006

A novel synthetic method of l-carvone involving the anodic oxidation of the enol acetate of isopinocamphone in the mixed solvent of methylene chloride-acetic acid as a key step was established. The overall yield of l-carvone from l-α-pinene was 34% and the overall optical yield was quantitative.
ORGANIC SYNTHESIS BY MEANS OF METAL COMPLEXES. XV. FACILE OXIDATIVE CONVERSION OF ACID HYDRAZIDES TO ACIDS, ESTERS AND AMIDES WITH OXYGEN ACTIVATED BY COPPER SALTS
Authors: Tsuji Jiro , Hayakawa Shunichi , Takayanagi Hiroshi
Published: July 2006

Acid hydrazides can be converted into acids, esters and amides by oxidation with molecular oxygen activated by copper salts in high yields.