bluuebunny/crossref_metadata_2025 huggingface dataset:
Catalytic Properties of La2−xSrxCoO4, a K2NiF4-Type Mixed Oxide
Authors: Nitadori Taihei , Misono Makoto
Published: July 2006

Catalytic activities of La2−xSrxCoO4, a K2NiF4-type mixed oxide, for propane oxidation increased with the extent of Sr substitution upto x = 1, and then decreased for x ≥ 1. This variation was in parallel with the reducibility or the oxidizing power of the catalyst surface. Stoichiometry determined by the iodometry showed that the excess oxygen which was present for x = 0 decreased with x upto x = 1, and the oxide became oxygen-deficient for x ≥ 1.5.
The Structure of Heptapotassium Tridecavanadomanganate (IV) Octadecahydrate, K7[MnV13O38]·18H2O
Authors: Nagai Kenji , Ichida Hikaru , Sasaki Yukiyoshi
Published: July 2006

Mr=1923.1, tetragonal, I4/mmm, a=11.366(2), c=19.638(6)Å, V=2537(1) Å3, Z=2,Dx=2.52 g cm−3, MoKα, λ =0.71069 Å, μ =3.12 mm−1, F(000)=1882, R=0.097 for 566 independent reflections. The crystal of K7[MnV13O38]·18H2O was found to be isomorphous to that of K7[NiV13O38]·18H2O. Corresponding interatomic distances between the two anions are essentially equal to each other. V–O bond distances range from 1.59 to 2.38 Å. One of the three K+ ions is tightly surrounded by 6–8 O atoms of the polyanions.
ENZYME-LIKE ENANTIOSELECTIVE CATALYSIS IN THE SPECIFIC COAGGREGATE SYSTEM OF VESICULAR AND MICELLAR SURFACTANTS
Authors: Ueoka Ryuichi , Matsumoto Yoko , Yoshino Takashige , Hirose Takashi , Kikuchi Jun-ichi , Murakami Yukito
Published: July 2006

The enzyme-like enantioselective catalysis (ka,obsdL = 1300 dm3 mol−1 s−1 and ka,obsdD = 0) was attained for the hydrolytic cleavage of p-nitrophenyl N-dodecanoyl-d(l)-phenylalaninate by N-benzyloxycarbonyl-l-phenylalanyl-l-histidyl-l-leucine in the large and stable vesicular system composed of 59 mol% ditetradecyldimethylammonium bromide and 41 mol% hexadecyltrimethylammonium bromide at 30 °C in 0.02 mol dm−3 Tris/0.02 mol dm−3 KCl buffer.
A New Iron (III) Porphyrin System for Olefin Epoxidation Catalysts
Authors: Takagi Shigeru , Takahashi Eitaro , Miyamoto T Ken , Sasaki Yukiyoshi
Published: July 2006

The iron (III) porphyrin-hypochlorite systems have been developed into the efficient catalysts. Successful epoxidation of olefins (styrene, α-methylstyrene, cyclohexene, and cyclooctene) using these catalytic systems have been demonstrated.
Polymorphism in Solid (CH3)3CCl as Studied by the Method of Differential Thermal Analyses and Nuclear Magnetic Resonance
Authors: Ohtani Sachie , Hasebe Tooru
Published: July 2006

A differential thermal analysis was performed on solid (CH3)3CCl and a new solid phase was found at saturated vapor pressure of the sample. This phase exists between 217.7 K and 219.5 K. Temperature dependence of the 1H-NMR free induction decay time, T2*, shows the onset of a new molecular motion in this phase.
Linear Relationship between First Ionization Potential (IP) of Element and ι(iota) Value. Removal of Periodicity
Authors: Inamoto Naoki , Masuda Shozo
Published: July 2006

The plot of square root of IP against ι value exhibited two straight lines depending on the type of the outer shell being s- or p-valence orbital. The stretching frequencies of H-X and HnX species also showed a linear correlation with ι after correction using the reduced mass.
Photoelectrochemical Deposition of Metals on TiO2 Powders in the Presence of Alcohols
Authors: Baba Ryo , Konda Ryuhei , Fujishima Akira , Honda Kenichi
Published: July 2006

Photodeposition of Pt, Ag and Au was performed on an anodically biassed TiO2 electrode in a solution containing “current-doubling” alcohols. Indirect reduction of the metal ions by the radical intermediates produced from the alcohol is, thus, suggested to participate in the photocatalytic preparation of metal-loaded TiO2 powders.
[2+2] Cycloaddition of Alkenyl Sulfide with α,β-Unsaturated Ketone. A Convenient Route to 1-Cyclobutenyl Ketones
Authors: Takeda Takeshi , Fujii Toshio , Morita Koichi , Fujiwara Tooru
Published: July 2006

2-Phenylthiocyclobutyl ketones were produced by the reaction of alkenyl sulfides with α,β-unsaturated ketones in the presence of AlCl3. The oxidation with MCPBA and the treatment with LDA or KH of the cycloadducts afford the corresponding 1-cyclobutenyl ketones in good yields.
Preparation of Perovskite-type Mixed Oxide (La1−XSrXCoO3) Supported on Cordierite. An Efficient Combustion Catalyst
Authors: Mizuno Noritaka , Fujii Hiroaki , Misono Makoto
Published: July 2006

La1−xSrxCoO3, a perovskite-type mixed oxide, was successfully formed on the surface of cordierite by impregnation with an aqueous solution of starting materials and subsequent calcination, when the cordierite was precoated with adequate amount of lanthanum oxide. Effect of Sr substituton for La was similar to the perovskite bulk itself, and a high catalytic activity for oxidation of propane was obtained at x = 0.2.
Preparation and Reactions of Titanium(III) Chloride Solubilized in Inert Organic Solvents
Authors: Suzuki Hitomi , Manabe Hajime , Enokiya Rika , Hanazaki Yasuaki
Published: July 2006

Titanium(IV) chloride reacts with dialkyl telluride in inert solvents such as dichloromethane or benzene to form a stable homogeneous solution of titanium(III) species. Reduction of several organic functionalities has been carried out using the low valent titanium solution thus obtained.
Novel Chiral Stationary Phases for the Resolution of the Enantiomers of Amino Acids by Ligand Exchange Chromatography
Authors: Yuki Yoichi , Saigo Kazuhiko , Tachibana Kouzou , Hasegawa Masaki
Published: July 2006

Novel chemically bonded chiral stationary phases (CSP’s) derived from (1R,2S)-2-carboxymethylamino-1,2-diphenylethanol and from (1S,2S)-2-carboxymethylamino-1,2-diphenylethanol were prepared. The ligand exchange chromatography on these CSP’s was found to be effective for the direct resolution of the enantiomers of amino acids.
On the Acidity of the Hydroxyl Groups in Calix[4]arenes and the Dissociation-dependent Conformational Change
Authors: Shinkai Seiji , Araki Koji , Koreishi Hiroshi , Tsubaki Takayuki , Manabe Osamu
Published: July 2006

By using a water-soluble calix[4]arene derivative and a p-nitro-substituted calix[4]arene the pKa values of the OH groups were determined for the first time. The first dissociation occurred at pH < 1 while the dissociation of the last proton occurred at pH > 11, indicating that these molecules have a super-acidic proton as well as a super-basic oxy-anion within a molecule. We also found that the calixarene conformation changes as a function of medium pH. These novel findings are rationalized in terms of strong intramolecular hydrogen bonding among the OH groups.
Oxidation of trans-Decahydronaphthalene in Acetic Anhydride
Authors: Yazu Kazumasa , Wakabayashi Takeshige , Nakayama Tetsuo
Published: July 2006

The oxidation of trans-decahydronaphthalene (1) was carried out in acetic anhydride with oxygen in the presence of Co(OAc)2, Ce(OAc)3, and NH4Br. Decahydronaphthyl acetates were obtained as main oxidation products in a selectivity of 81 mol% at 120 °C. In addition, relative reactivities of hydrogen atoms of 1 were determined at temperatures from 90 to 120 °C.
Selective Epoxidation of Chiral 2-Methyl-3,4-unsaturated Aldehyde Acetals
Authors: Honda Yutaka , Ori Aiichiro , Tsuchihashi Gen-ichi
Published: July 2006

Title compounds were treated with EtAlCl2 or TiC3OPri and t-butyl hydroperoxide (TBHP) at −78 °C, followed by K2CO3 to give anti-epoxide, which reacted with LiAlH4 at γ-position.
The Reaction of Crystalline Aluminum Hydroxide in Ethylene Glycol
Authors: Inoue Masashi , Kondo Yasuhiko , Inui Tomoyuki
Published: July 2006

Thermal treatment of crystalline aluminum hydroxide in ethylene glycol yields a compound having a boehmite structure with ethylene glycol incorporated between the boehmite layers. The grain size of the starting material was the predominant factor governing the formation of the product. The product had a unique honeycomb-like texture.
EFFECT OF A-STRAIN. DIASTEREOSELECTIVE SYNTHESIS OF 3,2′-METHYLENE BRIDGED CIS-4a-ARYLDECAHYDROISOQUINOLINE RING SYSTEM VIA N-ACYLIMINIUM ION-POLYENE RING CLOSURE
Authors: Kano Shinzo , Yokomatsu Tsutomu , Nemoto Hajime , Shibuya Shiroshi
Published: July 2006

Diastereoselective synthesis of 3,2′-methylene bridged 6-oxygenated 4a,6-cis-4a, 8a-cis-4a-aryldecahydroisoquinoline ring system was achieved by an application of N-acyliminium ion-polyene cyclization at the initial stage.
Electron Transfer vs. Excited-State Reactions in the Photochemical Reaction of the 2-Vinylnaphthalene-Fumaronitrile System
Authors: Yamaguchi Kentaro , Oh Shin-Chol , Shirota Yasuhiko
Published: July 2006

Photochemical reaction of the 2-vinylnaphthalene (VN)-fumaronitrile (FN) system by direct irradiation, which proceeds probably via ion radicals generated by electron transfer in the excited singlet state of VN to yield a VN-FN copolymer and VN cyclodimers, contrasts with the benzophenone-sensitized reaction, which proceeds via the triplet states of VN and FN with no dominant contribution of electron transfer leading to the formation of VN-FN cycloadducts as main products.
Syntheses of Picroroccelin Diastereomers and Their Regioisomers
Authors: Shin Chung-gi , Nakano Toshitaka , Sato Yoshiaki , Kato Haruo
Published: July 2006

Picroroccelin, 3,6-dibenzyl-3-hydroxy-6-methoxy-1-methyl-2,5-piperazinedione, and its regioisomer were synthesized as the diastereomeric mixtures from glycine anhydride via 3,6-dibenzylidene-1-methyl-2,5-piperazinedione by eight steps.
Capacitance Relaxation Method for Detecting Surface States and Bulk Traps at Semiconductor-liquid Junctions
Authors: Kobayashi Kenkichiro , Takata Masasuke , Okamoto Shoichi , Sukigara Mitsunori
Published: July 2006

To detect surface (or bulk trapping) states with small state density at a semiconductor-liquid junction, we have developed a capacitance relaxation method. This method is applied to studies of the electronic structure at the TiO2/H2O interface.
Light-induced Changes in the Infrared Spectra of Reaction Centers from Rhodopseudomonas sphaeroides in H2O and D2O Solutions
Authors: Hayashi Hidenori , Go Masahiro , Tasumi Mitsuo
Published: July 2006

Light-induced changes were observed in the infrared spectra of the reaction centers from Rhodopseudomonas sphaeroides in aqueous solutions. These changes were suppressed in the presence of ferricyanide, demonstrating that the light-induced changes were due to the primary photochemical reactions in photosynthesis.
A Simple Route to 2,4-Bisiminothietanes
Authors: Bestmann Hans Jürgen , Siegel Bernd , Schmid Günter
Published: July 2006

N-Substituted keteniminylidenetriphenylphosphoranes react with isothiocyanates in a [2+2] cycloaddition to form the four-membered ring phosphonium ylides. These yield the previously unknown arylidene-2,4-bisiminothietanes with aromatic aldehydes.
Stereoselective Synthesis of (2E,4E)- and (2Z,4E)-2,4-Alkadienoates by the Ester Enolate Claisen Rearrangement of (E)-1-Alkyl-3-trimethylsilyl-2-propenyl Glycolates Followed by the Peterson Reaction
Authors: Sato Toshio , Tsunekawa Hiroshi , Kohama Hiromasa , Fujisawa Tamotsu
Published: July 2006

The ester enolate Claisen rearrangement of (E)-1-alkyl-3-trimethylsilyl-2-propenyl glycolates gave (E)-erythro-2-hydroxy-3-trimethylsilyl-4-alkenoates with high diastereoselectivity, which were stereoselectively converted into (2E,4E)- and (2Z,4E)-2,4-alkadienoates by the Peterson reaction.
A PRACTICAL SYNTHESIS OF MYRCENOL BY PALLADIUM COMPLEX-CATALYZED ELIMINATION REACTION
Authors: Kumobayashi Hidenori , Mitsuhashi Shigeru , Akutagawa Susumu , Ohtsuka Sei
Published: July 2006

A Palladium complex-catalyzed elimination reaction of allyl amines was studied to establish a practical process for production of myrcenol. The catalytic elimination occurred smoothly with the cationic Pd(II) complexes. Among a variety phosphorous ligands, the tetramethylene and the pentamethylene diphosphine ligands proved to be the best ligand with respects to the catalytic activity and selectivity.
Crystal Structure and Electrical Properties of an Organic Conductor δ-(BEDT-TTF)2AuBr2
Authors: Mori Takehiko , Sakai Fumiko , Saito Gunzi , Inokuchi Hiroo
Published: July 2006

The crystal structure of a novel organic conductor δ-(BEDT-TTF) 2AuBr2 (BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene) is determined by X-ray analysis. This salt is essentially isostructural with δ-(BEDT-TTF)2AuI2 and one-dimensional along the adjacent stacks. Along this direction a two-fold superlattice is present at room temperature. The resistivity and the thermoelectric power exhibit anomalies above 320 K.
SYNTHESIS OF OPTICALLY ACTIVE SELENOXIDE
Authors: Shimizu Toshio , Kobayashi Michio
Published: July 2006

Fractional recrystallization of diastereomeric 2,4,6-triisopropylpheny1 4′-(l-menthyloxycarbonyl)phenyl selenoxide gave optically pure (−)-selenoxide. Transesterification of this diastereomerically pure (−)-selenoxide with methanol gave enantiomeric (−)-2,4,6-triisopropylphenyl 4-′-(methoxycarbonyl)phenyl selenoxide in 88.1% optical purity.
The Oxidative Michael Reaction. A Highly Diastereoselective Synthesis of 5-Oxocarboxylic Acid Derivatives
Authors: Hashimoto Yukihiko , Mukaiyama Teruaki
Published: July 2006

Methyldiphenylsilyl enol ethers react with an allylic cation stabilized by two sulfur atoms in a highly anti-selective manner to afford 5-oxocarboxylic acid derivatives.
Cyclodimerizations of Alkyl Styryl Ketones and Their Silyl Enol Ethers by Use of Iron Carbonyls
Authors: Ueda Tatsuo , Otsuji Yoshio
Published: July 2006

The reaction of alkyl styryl ketones with Fe3(CO)12 gives 3-acyl-4,5-diphenylcyclohexanones in a manner of [2+4] cyclodimerization. (η4-Enone)Fe(CO)3 complexes serve as catalyst for this reaction. Silyl enol ethers of the same ketones afford 4-acyl-3,5-diphenylcyclohexanones in the different type of [2+4] cyclodimerization upon treatment with Fe3(CO)12.
The Reaction of Diazonium Ion Generated from α-Azohydroperoxide with Phenols. The Isolation and Reaction of Diazoether Intermediate
Authors: Tezuka Takahiro , Ando Setsuo , Wada Toshinori
Published: July 2006

The reaction of benzenediazonium ion generated from α-azohydroperoxide with 1-naphthol gave a diazoether which rearranged to 2- and 4-phenylazo-1-naphthols.
Lithiated Dimethylketene Diisopropyl Dithioacetal as a Synthon of Homoenolate Dianion of Isobutyric Ester. An Application to the Synthesis of α-Methylenelactones
Authors: Fujisawa Tamotsu , Umezu Kazuto , Suzuki Masahiro , Sato Toshio
Published: July 2006

Lithium anion of dimethylketene diisopropyl dithioacetal reacted with various kinds of electrophiles to afford γ-substituted products with high regioselectivity. The utility of the lithiated ketene dithioacetal, a novel homoenolate dianion equivalent of isobutyric ester, was demonstrated in the synthesis of α-methylenelactones.
Dependence of Film Thickness on Electrochemical Kinetics of Polypyrrole and on Lithium/Polypyrrole Battery
Authors: Osaka Tetsuya , Naoi Katsuhiko , Ogano Satoshi , Nakamura Sadako
Published: July 2006

The charging-discharging behavior of lithium/LiClO4/polypyrrole battery was found to show a different dependence on film thickness of polypyrrole cathode prepared at various film formation potentials. In order to rationalize these battery properties, cyclic voltammetry was employed for the polypyrrole films prepared at different potentials as a function of film thickness.
An Infrared Study of NO Adsorbed on SiO2-Supported Fe, Co, and Ni Bimetallic Alloy Catalysts for CO Hydrogenation
Authors: Ishihara Tatsumi , Eguchi Koichi , Arai Hiromichi
Published: July 2006

The electronic state of bimetallic system of Fe, Co, and Ni was investigated by infrared spectra of the bent- and linear-types adsorbed nitrogen monoxide. The conversion of CO was related with the absorbance of bent-type NO. The alloying of metals increased the absorbance of bent-type in accord with high CO conversion and high selectivity to higher hydrocarbons.
Preparation of Electrical-Conducting CdS-Polymer Composites Using Organosols of CdS. Dependence of Electrical Conductivity on Kind of Polymer
Authors: Yamamoto Takakazu , Kubota Etsuo , Taniguchi Atsushi
Published: July 2006

Cadmium sulfide-polymer (poly(acrylonitrile), poly(vinylidene fluoride), etc.) composites containing cadmium sulfide in 16–73 wt-% are prepared by using organosols of cadmium sulfide. The composites are n-type semiconductors and show electrical conductivity ranging 10−9–10−2.5 S cm−1.
Photoallylation of Quinones with Allylstannane
Authors: Maruyama Kazuhiro , Imahori Hiroshi , Osuka Atsuhiro , Takuwa Akio , Tagawa Hiroyuki
Published: July 2006

Photochemical reactions of halogeno-quinones with allylstannane in a benzene or an acetonitrile solution afforded allylated quinones and allyl quinols as major products. Nuclear spin polarization effects observed during irradiation support a contribution of electron transfer process.
Generation of Lithium Enolates Accelerated by Lithium Trifluoromethanesulfonate. Application to the Selective 1,4-Chiral Induction in the Aldol Reaction of t-Butyl δ-Hydroxy Carboxylates
Authors: Narasaka Koichi , Ukaji Yutaka , Watanabe Kazutoshi
Published: July 2006

The presence of lithium trifluoromethanesulfonate accelerates the enolate formation from t-butyl δ-hydroxy carboxylates with lithium diethylamide. The reaction of the resulting enolates with ketones or benzaldehyde affords the corresponding α,δ-syn aldol adducts stereoselectively.
DIMINUTION OF AROMATICITY IN HOMOTROPYLIUM IONS BY DONOR SUBSTITUENTS AND THE SITE-DEPENDENCE THEREOF
Authors: Scott Lawrence T , Oda Mitsunori , Hashemi Mohammed M
Published: July 2006

The aromaticity of homotropylium ions is shown to diminish in the order: parent > 4-OH > 2-OH > 1-OH > 3-OH. Diatropicity and thermodynamic stability both appear to follow this same order.
Stereoselective Synthesis of (E)-5-Hydroxy-4-methyl-2-alkenoates by Palladium-Catalyzed Stereospecific Hydrogenolysis of (E)-4,5-Epoxy-4-methyl-2-alkenoates with Ammonium Formate
Authors: Shimizu Isao , Oshima Masato , Nisar Mohammad , Tsuji Jiro
Published: July 2006

Palladium-catalyzed hydrogenolysis of (E)-4,5-epoxy-4-methyl-2-alkenoates with HCO2H-Et3N gave (E)-5-hydroxy-4-methyl-2-alkenoates in good yields with inversion of stereochemistry.
New Marine Furanosesquiterpenoids, Tubipofuran and 15-Acetoxytubipofuran from the Stolonifer Tubipora musica Linnaeus
Authors: Iguchi Kazuo , Mori Kenichiro , Suzuki Makoto , Takahashi Hiroshi , Yamada Yasuji
Published: July 2006

New bioactive furanosesquiterpenoids, tubipofuran and 15-acetoxy-tubipofuran, were isolated from the Japanese stolonifer Tubipora musica Linnaeus. Their structures were determined on the basis of spectral data and chemical reactions.
Evidence for a Single-Electron-Transfer Activation in the Cleavage of Cobalt–Carbon Bonds of Alkylcobalt(III) Complexes with Iodine
Authors: Fukuzumi Shunichi , Ishikawa Kunio , Tanaka Toshio
Published: July 2006

Evidence for a single-electron-transfer (SET) activation in the cleavage of cobalt–carbon bonds of alkylcobalt(III) complexes with iodine is shown by the identification of products that could arise only via an SET pathway as well as by the kinetic comparison between the cleavage reaction of alkylcobalt(III) complexes with iodine and the electron-transfer reaction of ferrocene derivatives with iodine in acetonitrile.
Selective Synthesis of 1,3-Dienic Terpenes in a β-Form through Regioselective 1,4-Elimination of Allylic Ethers
Authors: Otera Junzo , Niibo Yoshihisa , Okuda Kazuhiro
Published: July 2006

γ-Methyl-substituted allylic ethers proved to be converted into β-substituted dienes exclusively on treatment with t-BuOK in refluxing THF or cyclohexane.
Synthesis of Zeolite ZSM-5 from Acid Clay and Cristobalite Rock
Authors: Narita Eiichi , Akito Ken-ichi
Published: July 2006

Zeolite ZSM-5 was easily synthesized by using acid-treated rocks such as acid clay and cristobalite rock in place of some synthetic chemicals. Although the crystal growth of existing α-quartz was also observed with the crystallization of ZSM-5, it can be inhibited by decreasing the alkalinity of a reaction mixture.
Laser Induced CIDNP Study of Photochemical Electron Transfer Reaction between Covalently Linked Porphyrin–Tryptophan Compounds and 1,4-Benzoquinone
Authors: Osuka Atsuhiro , Maruyama Kazuhiro
Published: July 2006

Argon ion laser excitation of covalently linked porphyrin–tryptophan compound in the presence of 1,4-benzoquinone in benzene-d6 resulted in strong 1H-NMR polarizations of tryptophan moiety. These CIDNP effects are reasonably explained by the mechanism involving the secondary electron transfer from tryptophan moiety to porphyrin cation radical as the key step.
Photochemical Conversion from Flexible Host to Rigid Host of a Doubly Capped γ-Cyclodextrin
Authors: Moriwaki Fumio , Ueno Akihiko , Osa Tetsuo , Hamada Fumio , Murai Koichi
Published: July 2006

γ-Cyclodextrin bearing two anthracene moieties (1) exhibited an exciton coupling band of R-helicity as well as excimer emission. Photoirradiation caused dimerization of the appended moieties, converting 1 from flexible host to rigid host.
STEREOSELECTIVE ALDOL REACTION FOR THE PREPARATION OF β-ETHYLTHIOMETHYL ALDOLS VIA TIN(II) ENOLATE BY THE USE OF A CATALYTIC AMOUNT OF THE TIN(II) SPECIES
Authors: Yura Takeshi , Iwasawa Nobuharu , Mukaiyama Teruaki
Published: July 2006

An aldol type reaction of divalent tin enolates with aldehydes is successfully achieved by the use of only a catalytic amount of the tin(II) species to afford the cross aldol products in good yields with high stereoselectivity.
Crystal Structure and Reflectance Spectrum of β″-(BEDT-TTF)2IAuBr
Authors: Ugawa Akito , Yakushi Kyuya , Kuroda Haruo , Kawamoto Atsushi , Tanaka Jiro
Published: July 2006

(BEDT-TTF)2IAuBr was synthesized and the crystal structure of this material was determined to be of the β″- type, being isomorphous to β″-(BEDT-TTF)2AuBr2. The polarized reflectance spectrum indicates that the electronic structure of this salt is of considerable two-dimensional character.
The Phospha-Cope Rearrangement of 4λ-Phospha-1-hexen-5-yne Derivatives
Authors: Kawashima Takayuki , Miki Yasuaki , Inamoto Naoki
Published: July 2006

The title compounds (1) were refluxed in hexanol to give the corresponding 1,4-pentadienylphosphinates, which seem to be formed via transient “phospha-allene derivatives”, together with Michael adducts of alcohol to the triple bond of 1.
Preparation and Properties of Inclusion Compounds of η3-Allylpalladium Complexes with Cyclodextrins
Authors: Harada Akira , Takeuchi Mizutomo , Takahashi Shigetoshi
Published: July 2006

One-to-one inclusion compounds were obtained in high yields by the treatment of β- and γ-cyclodextrins(CD) with di-μ-chloro-bis(η3-allyl)dipalladium complex and its analogues. The formation of inclusion compounds is selective.
Asymmetric Synthesis of the Both Enantiomers of α-Hydroxy Acids by the Diastereoselective Reduction of Chiral α-Keto Amides with (Complex) Metal Hydrides in the Presence of Metallic Salt
Authors: Soai Kenso , Isoda Takeshi , Hasegawa Hitoshi , Ishizaki Miyuki
Published: July 2006

Effects of the metallic salts and the reducing reagents in the diastereoselective reduction of chiral α-keto amides derived from (S)-proline methyl ester were examined. Lithium borohydride afforded (S)-α-hydroxy acids, whereas diisobutylaluminum hydride afforded (R)-isomers. In the presence of lithium bromide, reduction with LiBH4 afforded (S)-mandelic acid in over 80% e.e.
PHOTOREACTION OF 5,7-DIMETHOXYCOUMARIN WITH ADENOSINE
Authors: Shim Sang Chul , Shim Hyun Kwan , Cho Tae Heung
Published: July 2006

The photoreaction of 5,7-dimethoxycoumarin with adenosine has been studied as a model for skin-sensitization reaction of psoralens. One of the major photoadducts was isolated by preparative column chromatography and reverse-phase high performance liquid chromatography. The photoadduct was not a C4-cycloadduct but simple addition product in contrast to pyrimidine base adducts.
The Synthesis and Properties of 3-Arylcyclohepta[d]isoxazolylium Ions
Authors: Nitta Makoto , Kanomata Nobuhiro
Published: July 2006

3-Arylcyclohepta[d]isoxazolylium tetrafluoroborates were synthesized by the cycloaddition of tricarbonyl(2-5-η-2,4,6-cycloheptatrienone)iron with aromatic nitrile oxides followed by several reactions. The pKR+ values of these ions are less than +1.0 showing that the stability of the tropylium ions is much decreased by the fusion of the isoxazole ring.
Effect of Alkyl-Substituted Pyrrolidones on the Formation of Ethylene Glycol from Synthesis Gas
Authors: Ohgomori Yuji , Mori Shoichiro , Yoshida Shin-ichi , Watanabe Yoshihisa
Published: July 2006

Synthesis of ethylene glycol from synthesis gas via rhodium catalysis in the presence of a pyrrolidone, which has a stronger electron donative substituent than methyl or has two 2-oxopyrrolidinyl groups in the molecule was examined. These compounds facilitate the formation of ethylene glycol.
Importance of Photolysis of Nitrate in Oxidation of Atmospheric Sulfur Dioxide
Authors: Hara Hiroshi , Okita Toshiichi
Published: July 2006

Photochemical oxidation of sulfite in concentrated solution of ammonium nitrate was studied with a mercury lamp and solar radiation as a chemical model system of the water-film on the atmospheric nitrate aerosol. Sulfite was found to be photo-oxidized with first-order reaction kinetics. Temperature and nitrate concentration dependences of the rate constant suggested that low temperature hardly decreased the atmospheric significance of this reaction and that the oxidation favored high conentration.
Efficient Preparation of Anticancer Platinum Pyrimidine Blues. On the Highly Reproducible Reaction Conditions and Purification by Gel Filtration
Authors: Okuno Yohmei , Tonosaki Kumiko , Inoue Takayuki , Yonemitsu Osamu , Sasaki Takuma
Published: July 2006

The employments of dianion such as SO42− and nucleosides as a substrate resulted prevalent formation of platinum blues at 75 °C for 20 h. Gel filtration method was successfully used for purification of the products. It is notable that green species rather than blue complexes gave remarkably high antitumor activity against L1210 cells.
PHOTOLYSIS OF 5-BR0M0-1,3-DIMETHYLURACIL IN SUBSTITUTED BENZENES
Authors: Seki Koh-ichi , Bando Yuko , Ohkura Kazue
Published: July 2006

Photolysis of 5-bromo-1,3-dimethyluracil in toluene, xylene and anisole afforded the anormalously substituted 6-aryl-1,3-dimethyluracils beside the expected products 5-aryl-1,3-dimethyluracils, while the reaction with veratrole occurred exclusively at the 5-position of the uracil ring.
Conversion of Methane to Aromatic Hydrocarbons by Combination of Catalysts
Authors: Otsuka Kiyoshi , Komatsu Takayuki
Published: July 2006

Aromatic hydrocarbons were synthesized by passing CH4 and O2 through the two catalyst beds, i.e., the catalyst active for oxidative coupling of CH4 and that for converting light hydrocarbons to aromatics.
Cycloaddition Reaction of 2,3-Disubstituted Oxiranes with Isocyanates by Highly Activated Catalyst; Ph4SbI–Bu3SnI
Authors: Fujiwara Masahiro , Baba Akio , Tomohisa Yuri , Matsuda Haruo
Published: July 2006

The combination of Ph4SbI and Bu3SnI proved to be a new excellent catalyst for effecting cycloaddition reaction of inactive 2,3-disubstituted oxiranes with isocyanates under neutral conditions, yielding oxazolidinones in high yields, while either of both metal iodides had no activity individually.
In-situ FT-IR Study of Nitric Oxide Adsorbed on Sulfided Co–Mo/Al2O3 Catalyst
Authors: Obara Toshiyuki , Yamada Muneyoshi , Amano Akira
Published: July 2006

Infrared study was made of NO adsorbed on Co–Mo/Al2O3. catalyst subjected to sulfidation/reduction pretreatments. Both Co and Mo served as a site for NO adsorption. The amount of the adsorption depended on the pretreatment and was in the following order: sulfided > sulfided-then-reduced > reduced-then-sulfided > untreated. Higher adsorptive capacity coincided with higher hydrogenation activity.
Crystal Structure and Physical Properties of (BMDT-TTF)SbF6
Authors: Kato Reizo , Kobayashi Hayao , Kobayashi Akiko
Published: July 2006

In a crystal of (BMDT-TTF)SbF6, quasi two-dimensional(2D) intermolecular interactions of BMDT-TTF molecules are observed. This compound was a semiconductor with fairly high room temperature conductivity (ca. 1 S cm−1), and would be a simple model compound for the consideration of electron-electron interaction in quasi 2D half-filled band system.
Decomposition of O-Phosphoserine Accelerated by Copper(II) Complexes
Authors: Murakami Tasuku
Published: July 2006

The decomposition of O-phosphoserine accelerated by the formation of ternary copper(II) complexes with other bidentate ligands has been kinetically investigated in aqueous solutions. The reaction was assigned to a β-elimination and the observed rate constant was expressed as a linear function of [OH−].
Synthesis of Natural Uvidin C
Authors: Lopez José , Sierra Jorge , Cortes Manuel
Published: July 2006

The first synthesis of (−)-Uvidin C from (−)-drimenol through the ketol is described.
Catalytic Oxidation of Hydroquinones and Naphthalenediols to 1,4-Quinones with H2O2 in the Presence of Chromium(VI) Oxide-Bistributyltin Oxide and an Application to Vitamin K1 Synthesis
Authors: Inoue Masami , Uragaki Toshitaka , Enomoto Saburo
Published: July 2006

The oxidation of hydroquinones and naphthalenediols to 1,4-quinones was carried out in the presence of a chromium(VI) compound formed from chromium(VI) oxide and bistributyltin oxide with 30% aqueous H2O2 in benzene-isopropyl ether at 50 °C. The catalyst was fixed on charcoal and used for the oxidation of dihydrovitamin K1 to vitamin K1 in ethyl alcohol.
Generation of Thioketene S-Methylides and Their 1,3-Cycloadditions
Authors: Terao Yoshiyasu , Aono Masahiro , Takahashi Ikue , Achiwa Kazuo
Published: July 2006

Thioketene S-methylide was found to be generated by release of disiloxane from α-(trimethylsilyl)vinyl (trimethylsilyl)methyl sulfoxide and its 1,3-cycloaddition provided a novel method for synthesis of 2-alkylidenetetrahydrothiophenes.
An Infrared Spectroscopic Study of Acrylonitrile Adsorbed on Silica-Supported Copper Catalyst
Authors: Sugiyama Kazuo , Miura Hiroshi , Sekiwa Hideyuki , Matsuda Tsuneo
Published: July 2006

Adsorption state of acrylonitrile on Cu catalyst was studied by means of infrared spectroscopy. The C≡N stretching vibration of acrylonitrile adsorbed on Cu was appreciably shifted to lower frequency regions in comparison with that in liquid-state. The π-component coordination of cyano group in acrylonitrile with Cu surface site was suggested.
Reaction of Alcohol with NO2 on a Cleaned Glass Surface
Authors: Maeda Yasuaki , Fujio Yoshifumi , Munemori Makoto
Published: July 2006

Formation of alkyl nitrite from alcohol and NO2 was very fast on a Pyrex glass surface cleaned with chromic acid mixture. The reaction was practically zero order with respect to alcohol and second order with respect to NO2. The rate constant was (1.7±0.08)×10−18 cm−3 molecule−1 s−1 for methyl nitrite formation and the apparent activation energy was −53.5 kJ mol−1.
FLOW POLAROGRAPHY OF SODIUM(I) IN AIR-SATURATED SOLUTIONS
Authors: Hara Minoru , Nomura Noboru
Published: July 2006

Modified normal pulse polarography was applied to the determination of sodium(I) in flowing solutions. The interferences from dissolved oxygen and hydrogen ions were avoided by measuring the oxidation current of amalgamated sodium which is formed in pulse duration. This method is useful for the determination of metal ions in fluid streams.
EXTRACTION OF COBALT(II), NICKEL(II), AND COPPER (II) FROM STRONGLY ALKALINE MEDIA BY 4-n-DODECYL-6-(2-THIAZOLYLAZO)RESORCINOL
Authors: Matsunaga Hideyuki , Suzuki Toshishige M
Published: July 2006

A new extracting reagent, 4-n-dodecyl-6-(2-thiazolylazo)resorcinol, has been synthesized. The extraction characteristics of this reagent have been examined for several heavy metal ions. Cobalt(II), nickel(II), and copper(II) can be extracted into 4-methyl-2-pentanon from strongly alkaline solutions without additional organic reagents such as quarternary ammonium salts.
PHOTOCYCLOADDITION REACTION OF 1,4,5,8-TETRAAZAPHENANTHRENE WITH SOME OLEFINS
Authors: Shim Sang Chul , Park Seung Ki
Published: July 2006

Irradiation of 1,4,5,8-tetraazaphenanthrene with some olefins such as trans-1,2-dichloroethylene, vinyl bromide, acrylonitrile, and 2-chloroacrylonitrile gave [2+2] cycloadducts. The stereochemistry of cycloadducts, quantum yield measurements, sensitization, and quenching studies indicate the reaction to proceed through a triplet excited state.
A NOVEL SYNTHESIS OF 2-BENZOTHIAZOLAMINE AND ITS DERIVATIVES BY A NICKEL(0)-CATALYZED REACTION OF 1,2-AMINOIODOARENES WITH THIOUREAS
Authors: Takagi Kentaro
Published: July 2006

In the presence of a nickel(0) complex, 1,2-aminoiodoarenes underwent the reaction with thioureas to provide a facile, site-specific, and general synthetic procedure of 2-benzothiazolamine and its derivatives under non-oxidative conditions.
ELECTROCHEMICALLY SWITCHED CATION BINDING IN PENTAOXA [13] FERROCENOPHANE
Authors: Saji Tetsuo
Published: July 2006

The effects of cations on the half-wave potential for oxidation of pentaoxa [13] ferrocenophane (1) in dichloromethane were studied. The shift of the half-wave potential by the addition of alkaline cations shows the abrupt decrease of the binding constant of 1 with cations upon electrochemical oxidation.
A NOVEL RHODIUM-TRI-N-ALKYLPHOSPHINE CATALYST SYSTEM FOR THE HYDROGENATION OF CARBON MONOXIDE, FORMALDEHYDE, AND GLYCOLALDEHYDE
Authors: Watanabe Eiichi , Hara Yoshinori , Wada Keisuke , Onoda Takeru
Published: July 2006

Syngas treatment of a mixture from rhodium compound, a large equimolar tri-n-alkylphosphine, or tri(α-nonsubstituted alkyl)phosphine, and a solvent gives rise to an orange yellow solution, which is a highly active catalyst for hydrogenation of carbon monoxide to ethylene glycol and methanol. Similarly, under syngas condition, formaldehyde and glycolaldehyde are effectively hydrogenated to methanol and ethylene glycol, respectively, by the same orange yellow catalyst solution.
SELECTIVE FORMATION OF METHANOL OVER WATER-TREATED RANEY RUTHENIUM
Authors: Yano Toshiyuki , Ogata Yoichi , Aika Ken-ichi , Onishi Takaharu
Published: July 2006

Methanol was obtained as a main product from CO and H2 over water-treated Raney-Ru, although hydrocarbons were exclusively obtained over Ru powder. The C-base selectivity to methanol was 73% at 353 K under a total pressure of 600 Torr (1 Torr = 133.3 Pa). The selectivity was increased with an increase of the Al content. XPS studies showed that the surface Al was oxidized by water treatment above 473 K, which was necessary for methanol formation.
PICOSECOND PULSE RADIOLYSIS STUDIES OF THE SHORT LIVED CATION PRODUCED IN BUTYLCHLORIDE AND BUTYLBROMIDE
Authors: Sumiyoshi Takashi , Yamada Tatsuya , Ohtaka Akira , Tsugaru Kazunori , Katayama Meiseki
Published: July 2006

Transient species produced in neat butylchloride and butylbromide were observed by means of picosecond pulse radiolysis. The visible band which was produced during electron pulse and then decayed with a half lifetime of 2 ns was assigned to a vibrationally excited cation.
TETRATELLURADICYCLOPENTA[b,g]NAPHTHALENE (TTeDCN)
Authors: Okada Naoko , Saito Gunzi , Mori Takehiko
Published: July 2006

The first synthesis of tetratelluradicyclopenta[b,g]naphthalene (TTeDCN), which is a six-membered ring isomer of hexamethylenetetratellurafulvalene (HMTTeF), is reported. TTeDCN is obtained as yellow microcrystals and gives green single crystals in which TTeDCN forms a complex with HMTTeF in 1:1 molecular ratio.
DETERMINATION OF COBALT IN NATURAL WATERS BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY AFTER MICRO SOLVENT EXTRACTION WITH CAPRIQUAT
Authors: Shimizu Tokuo , Koyanagi Hidenobu , Shijo Yoshio , Sakai Kaoru
Published: July 2006

Cobalt is extracted as the thiocyanato complex with trioctylmethylammonium chloride(Capriquat) in o-dichlorobenzene, and determined by graphite furnace atomic absorption spectrometry using pyrolytic graphite coated tube. At the sampling point, the proposed method was applied. The organic phase separated was stored in a refrigerator, and determined in the laboratory within a day.
MOLECULAR DESIGN OF SYNTHETIC LIPIDS FORMING INVERTED HEXAGONAL PHASE
Authors: Murakami Yukito , Kikuchi Jun-ichi , Takaki Toshihiko , Uchimura Katsuya
Published: July 2006

The inverted hexagonal phase was formed with mixed lipid systems composed of two species of synthetic lipids, the one having two quinoyl moieties and the other holding a single hydroxyl moiety as their head groups, as confirmed by negative staining electron microscopy and selected area electron diffraction measurements.
COLLOIDAL PLATINUM PROTECTED BY POLYMERIZED MICELLE. PREPARATION AND APPLICATION TO CATALYSIS FOR PHOTOCHEMICAL HYDROGEN GENERATION FROM WATER
Authors: Toshima Naoki , Takahashi Tadahito , Hirai Hidefumi
Published: July 2006

Colloidal platinum protected by polymerized micelle was prepared by photoreduction of chloroplatinic acid in the presence of unsaturated surfactants and the subsequent UV-polymerization of the surfactants. This colloidal platinum acts as an active catalyst for photochemical hydrogen generation from water in the system of EDTA/Ru(bpy)32+/MV2+.
N-(ω-TOSYLOXYALKYL)PHTHALIMIDES AS REACTIVE GENERAL SYNTHONS FOR INTRODUCING ALKYLAMINO GROUPS AND THEIR APPLICATION FOR THE “SELF-PROLIFERATIVE” SYNTHESIS OF OPEN-CHAIN POLYAMINES
Authors: Iwata Masaaki , Kuzuhara Hiroyoshi
Published: July 2006

New synthetic routes to N-(ω-tosyloxyalkyl)phthalimides (2) were developed and the synthetic utility of 2 as alkylating reagents was exemplified in the open-chain polyamine synthesis involving the “self-proliferative” process.
CONTROL OF Ni DISTRIBUTION IN Al2O3 SUPPORT USING ALKOXIDE TECHNIQUE
Authors: Fujiyama Takeshi , Tsuiki Hideyasu , Ueno Akifumi
Published: July 2006

The distribution of nickel atoms in alumina spheres was well controlled by varying impregnation period when the alumina spheres are immersed in a solution composed of nickel-ethlene glycolate and ethyl silicate.
EFFECTS OF CYCLODEXTRIN ON ENHANCEMENT FOR CHEMILUMINESCENCE OF THE LUMINOL RELATED COMPOUND
Authors: Karatani Hajime
Published: July 2006

The chemiluminescence of 6-[N-(4-aminobutyl)-N-methyl]amino-2,3-dihydro-1,4-phthalazine dione(aminobutylmethylisoluminol:ABMI) in an alkaline aqueous solution was found to be enhanced by adding β-cyclodextrin(β-CD) to the reaction system. In this case, β-CD exhibited both effects of an increase in the fluorescence quantum yield of the emitter (Φfl) and an increase in the fraction of molecules of the intermediate which cross over to the excited state of the product(Φes).
SUBSTANCE P ANALOGUES CONTAINING p-FLUORO-l-PHENYLALANINE
Authors: Tanaka Hisanori , Osakada Fumio , Ohashi Shin-ichi , Shiraki Masaru , Munekata Eisuke
Published: July 2006

Three substance P analogues containing p-fluoro-l-phenylalanine were synthesized by Merrifield’s solid phase method. The spectroscopic behaviors in CD- and 19F NMR-spectra as well as pharmacological properties of the fluorine containing substance P analogues are described.
ELECTROREDUCTIVE N-ALKYLATION OF AMIDES, CARBAMATES, AND N-HETEROCYCLES
Authors: Shono Tatsuya , Kashimura Shigenori , Nogusa Hideo
Published: July 2006

The N-alkylation of amides, lactams, carbamates, and N-heterocycles was easily attained in good yields by the electroreduction of the substrates in the presence of alkyl halides.
CRYSTAL STRUCRTURE OF α-(BEDT-TTF)3(ReO4)2
Authors: Kanbara Hirohisa , Tajima Hiroyuki , Aratani Sukekazu , Yakushi Kyuya , Kuroda Haruo , Saito Gunzi , Kawamoto Atsushi , Tanaka Jiro
Published: July 2006

The two-dimensional strucrture of α-(BEDT-TTF)3(ReO4)2 on the (010) plane is very similar to that of (BEDT-TTF)3(ClO4)2, although the three dimensional structure is quite different from each other. The slight geometrical difference between the crystallographically independent molecules suggests the different formal charge of these molecules.
SURFACE POTENTIAL STUDIES ON CATION BINDING CHARACTERISTICS OF THE MONOLAYER OF CROWN ETHER HAVING A LONG HYDROCARBON CHAIN
Authors: Matsumura Hideo , Furusawa Kunio , Inokuma Seiichi , Kuwamura Tunehiko
Published: July 2006

The surface potential measurement of monolayer showed that there exists a possibility for determining binding constants of several metal cations with 18-crown-6 when they exist in interfacial circumstances by introducing a long hydrocarbon chain to the crown ether.
ORGANIC SYNTHESIS USING HALOBORATION REACTION. A DIRECT AND SELECTIVE SYNTHESIS OF (Z,Z)-1-BROMO-1,3-DIENES BY USING HALOBORATION-HYDROBORATION OF TWO ALKYNES
Authors: Hyuga Satoshi , Takinami Satoru , Hara Shoji , Suzuki Akira
Published: July 2006

Bis(2-bromo-1-alkenyl)bromoboranes, readily obtainable by the bromoboration of 1-alkynes with tribromoborane, have been found to be converted in situ into the corresponding borohydrides by the reduction with diisobutylaluminum hydride. Such borohydrides are effective as hydroborating agents for internal alkynes to provide bis(bromoalkenyl)(alkenyl)boranes, which react with iodine in the presence of potassium acetate to give (Z, Z)-1-bromo-1,3-dienes, specifically.
SYNTHESIS AND PROPERTIES OF MEMBRANOUS SURFACTANTS BEARING AN ANION-CAPPED CROWN RING AS A HEAD GROUP
Authors: Shinkai Seiji , Nakamura Shinichiro , Manabe Osamu , Yamada Tetsuhiro , Nakashima Naotoshi , Kunitake Toyoki
Published: July 2006

Membrane-forming dialkyl amphiphiles (2a and 2b) bearing an anion-capped crown ether ring as a head group were synthesized. The CMC of 2b, as well as that of a single-chain analogue, was enhanced only on the addition of K+ (salt-in effect). Electron microscopy established that 2b forms lamellar and rod-like aggregates at pH 6.0. This is the first substantial example for the membrane formation from crown-containing dialkyl amphiphiles.
THE PHOSPHA-COPE REARRANGEMENT OF 3-ARYL-3λ-PHOSPHA-1,5-HEXADIENE DERIVATIVES
Authors: Kawashima Takayuki , Miki Yasuaki , Tomita Tetsuji , Inamoto Naoki
Published: July 2006

The title compounds were refluxed in hexanol to give quantitatively the O-hexyl aryl-4-pentenylphosphinate derivatives via transient monomeric metaphosphinates, which seem to be formed by the phospha-Cope rearrangement. Kinetic studies show that the reaction rate increases with an increase in the magnitude of the positive charge on the phosphorus atom.
A CONVENIENT SYNTHESIS OF DIAZO COMPOUNDS BY CATALYTIC DEHYDROGENATION OF HYDRAZONES WITH COBALT SCHIFF BASE COMPLEX-OXYGEN SYSTEM
Authors: Nishinaga Akira , Yamazaki Shigekazu , Matsuura Teruo
Published: July 2006

Cobalt Schiff base complex catalyzed oxidation of hydrazones is found to be a convenient method for the synthesis of diazo compounds.
NEW CHIRAL STATIONARY PHASES FOR THE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC RESOLUTION OF ENANTIOMERS
Authors: Saigo Kazuhiko , Chen Yun , Kubota Naomi , Tachibana Kouzou , Yonezawa Noriyuki , Hasegawa Masaki
Published: July 2006

Optically active polyamides were synthesized from (−)-1,2-diphenylethylenediamine and diacid chlorides by low temperature solution polycondensation. The polyamides were found to be effective as chiral stationary phases for direct HPLC resolution of enantiomers such as trans-1,2-cyclobutanedicarboxanilide, Troger base, 2,2′-dihydroxy-1,1′-binaphthyl, mandelamide, benzyl mandelate, and benzoin.
STEREOCONTROLLED SYNTHESIS OF SEGMENTS FOR THE SYNTHESIS OF TYLONOLIDE BY USING A RELATIVE 1,2-ASYMMETRIC INDUCTION
Authors: Kitano Yasunori , Kusakabe Masato , Kobayashi Yuichi , Sato Fumie
Published: July 2006

Two precursors corresponding to the C(1)–C(9) and C(13)–C(17) portions of tylonolide were synthesized in which all the chiral centers were induced correctly from the only one stereocenter existing in 2-methy-3-trimethylsilylbut-3-enal and 2-benzyloxymethyl-3-trimethylsilylbut-3-enal, respectively.
REACTIVE LATTICE OXYGEN IN MULTICOMPONENT BISMUTH MOLYBDATE CATALYST FOR OLEFIN OXIDATION
Authors: Matsuura Ikuya , Hashiba Hideto , Kanesaka Isao
Published: July 2006

Position of the reactive lattice oxygen in the multicomponent bismuth molybdate catalyst was determined based on the isotope shift in Mo–O stretching vibration by measuring infrared and Raman spectra of the 18O-substituted catalyst with propylene oxidation using 18O2 tracer. It was proven that the oxidation reaction of olefin proceeds in accordance with the “water tank model” proposed by Moro-oka.
TWO INTERMEDIATES OBSERVED IN THE GRIGNARD REACTION WITH BENZOPHENONE
Authors: Maruyama Kazuhiro , Hayami Jun-ichi , Katagiri Toshimasa
Published: July 2006

Intermediates in the reaction of Grignard reagent with benzophenone in THF were investigated by both ESR and stopped-flow techniques. The short-lived (blue colored) and other long-lived (pink colored radical) intermediates were observed. The pink colored radical intermediate could be in a state of dimeric aggregate of benzophenone anion radicals ion-paired with Grignard cation [“RMgBr”]\overset+• in solution.
A TOTAL SYNTHESIS OF (±)-WIDDROL. SYNTHETIC APPLICATION OF THE FORMAL BRIDGEHEAD SUBSTITUTION OF 1-METHOXYBICYCLO[3.2.2]NON-6-EN-2-ONES WITH ALKYL GROUPS
Authors: Uyehara Tadao , Yamada Jun-ichi , Furuta Toshiaki , Kato Tadahiro
Published: July 2006

The [6–7] fused-ring sesquiterpene (±)-widdrol has been prepared stereospecifically utilizing the characteristic reactions of the bridged polycyclic compounds derived from 1-methoxy-5-methylbicyclo[3.2.2]non-6-en-2-one.
REGIOSELECTIVE REDUCTION OF POLYKETONES ON SILICA GEL SURFACE WITH BORANE–TRIMETHYLAMINE COMPLEX
Authors: Gohzu Shun-ichi , Tada Masahiro
Published: July 2006

Steroidal diones and trione, bicyclic diones (7 and 8) and a tricyclic dione were adsorbed on silica gel and reduced with BH3.NMe3. The carbonyl groups at C-3 of the steroids, at C-4 of 7 and at C-3 of 8 were reduced regioselectively. The FT-IR spectra of 5α- and 5β-androstane-3,17-dione adsorbed on silica gel were measured.
HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC CHARACTERIZATION OF THE ROLE OF INORGANIC PYROPHOSPHATASE IN REGULATING THE REACTION OF URIDINE 5′-TRIPHOSPHATE WITH GLUCOSE 1-MONOPHOSPHATE
Authors: Hirano Hisanobu , Baba Yoshinobu , Yoza Norimasa , Ohashi Shigeru
Published: July 2006

Inorganic pyrophosphatase ( EC 3.6.1.1 ) catalyzing the hyrolysis of inorganic pyrophosphate drived the reaction of uridine 5′-triphosphate with glucose 1-monophosphate in the direction of uridine 5′-diphosphoglucose formation. The kinetic data in vitro supported the concept that inorganic pyrophosphate might be involved as one of products and its concentration level might regulate the above reaction in metabolic process.
THE MOLECULAR STRUCTURE OF DITHIA[3.3]AZULENOMETACYCLOPHANE AND ITS PYRIDINE ANALOGUES
Authors: Fukazawa Yoshimasa , Usui Shuji , Shiokawa Toshihiro , Tsuchiya Jun
Published: July 2006

The preferred conformation of three dithia[3.3]azulenophanes have been determined to be the syn by X-ray crystallographic analysis and it is further ascertained by the molecular mechanics method using the MMPI program.
PORPHYRIN ANION RADICALS DETECTED BY CIDNP TECHNIQUE. FIRST OBSERVATION OF CIDNP SIGNALS DUE TO PORPHYRIN IN THE PHOTOREACTION BETWEEN PORPHYRIN AND PHENOLS
Authors: Maruyama Kazuhiro , Furuta Hiroyuki
Published: July 2006

Photo-CIDNP signals due to porphyrin were observed for the first time in the photoreaction of porphyrin and phenols in benzene. The intensities of CIDNP signals increased in proportion to the oxidation potential of phenol compounds. Relative magnitude of hyperfine coupling constants of porphyrin anion radicals is discussed.
A NOVEL AND USEFUL SYNTHETIC WAY TO CHIRAL α-SULFINYL CYCLIC KETONES BY THE ACID-CATALYZED REACTION OF ENOL SILYL ETHERS OF CYCLIC KETONES WITH CHIRAL SULFINATES
Authors: Hiroi Kunio , Matsuyama Nobuhiko
Published: July 2006

The acid-catalyzed reactions of enol silyl ethers of cyclic ketones with chiral sulfinic esters provided a new and general entry to optically active α-sulfinyl ketones. Reaction of the enol silyl ether of cyclohexanone with methyl (S)-p-toluenesulfinate in the presence of boron trifluoride etherate (2.0 equiv.) produced (Rs)-2-p-toluenesulfinylcyclohexanone with inversion of configuration in 98.3% stereospecificity at the sulfur atom. This method was applicable smoothly to enol silyl ethers of other cyclic ketones with high stereospecificity.