bluuebunny/crossref_metadata_2025 huggingface dataset:
FORMATION OF ALKOXYAMINOSULFONIUM IONS
Authors: Minato Hiroshi , Yamaguchi Kei , Kobayashi Michio
Published: July 2006

An alkoxyaminosulfonium ion is prepared from N-tetramethylene-p-toluenesulfinamide and methyl trifluoromethanesulfonate. Its NMR spectrum shows that its two α hydrogens of the pyrrolidine ring are magnetically non-equivalent, and this alkoxyaminosulfonium ion is not planar but pyramidal. It reacts with methyl sulfide, forming the original sulfinamide and trimethylsulfonium ion.
THE PARTICIPATION OF LIGHT IN THE FORMATION OF PHTHALOCYANINE
Authors: Tomoda Haruhiko , Hibiya Eiji , Nakamura Takayoshi , Ito Hiroki , Saito Shojiro
Published: July 2006

It was found that roomlight accelerates the formation of phthalocyanine in the reaction of phthalonitrile with sodium alkoxide at elevated temperatures. Moreover, UV irradiation gave phthalocyanine even at room temperature where no formation of phthalocyanine was observed without light.
SENSITIZED PHOTOOXIDATION OF cis-, AND trans-2-BORNYUDENE-2-BORNANES: A FORMATION OF AN EPOXYCYCLOPROPANE DERIVATIVE DURING THE OXYGENATION
Authors: Takeshita Hitoshi , Hatsui Toshihide , Jinnai Osamu
Published: July 2006

Singlet oxygen oxidation of the title olefins produced camphor, derived from dioxetanes, and epoxides, reduction products of the intermediary peroxiranes, together with the same keto-aldehyde formed by a rearrangement of isomeric allylhydroperoxides. As a new type of product, an epoxycyclopropane derivative was produced in a stereospecific fashion from the trans-olefin.
THE REACTION OF 3,4-DIBROMOSULFOLANE WITH AMINES. A NEW METHOD FOR THE PREPARATION OF BIOTIN PRECURSOR
Authors: Kotake Hiroshi , Inomata Katsuhiko , Murata Yasue , Kinoshita Hideki , Katsuragawa Masahiro
Published: July 2006

It was found that 3,4-dibromosulfolane reacted with amines to give the corresponding 3,4-diaminosulfolane or 4-amino-2-sulfolene derivatives. Also, it was established that N,N′-dibenzyl-cis-ureylenetetrahydrothiophene as a precursor of biotin was derived from cis-3,4-bis(benzylamino)sulfolane prepared by the above reaction.
THE REACTION OF 2-(1,3-BUTADIENYL)MAGNESIUM CHLORIDE
Authors: Kondo Kiyosi , Dobashi Satoshi , Matsumoto Masakatsu
Published: July 2006

The reaction of 2-(1,3-butadienyl)magnesium chloride (1) with aldehydes and ketones afforded a mixture of 1,3-dienyl alcohol (3) and 1,2-dienyl alcohol (4). The selective formation of another 1,3-dienyl alcohol (6) was observed when the Grignard reagent (1) was treated with epoxides. The latter reaction was applied to the synthesis of the sex attractant of a bark beetle.
THE COEXTRACTION OF WATER INTO NITROBENZENE WITH ALKALI METAL SALTS OF HEXANITRODIPHENYLAMINE IN THE PRESENCE OF DIBENZO-18-CROWN-6
Authors: Iwachido Tadashi , Kimura Masaho , Tôei Kyoji
Published: July 2006

The hydration numbers of alkali metal cations and their complex cations with dibenzo-18-crown-6 in water-saturated nitrobenzene were determined. The complexation causes a clear decrease in hydration number, indicating that the water molecules hydrated have partly been replaced by the six oxygen atoms of dibenzo-18-crown-6.
DIRECT GLUCOSIDATION OF TETRA-O-BENZYL-α-d-GLUCOPYRANOSE BY SYSTEM OF METHANESULFONIC ACID AND COBALT(II) BROMIDE
Authors: Koto Shinkiti , Morishima Naohiko , Zen Shonosuke
Published: July 2006

A novel method for glucosidation of 2,3,4,6-tetra-O-benzyl-α-d-glucopyranose by a system of methanesulfonic acid and cobalt(II) bromide in dichloromethane at a room temperature is described.
STRUCTURAL STUDY OF OPTICAL RESOLUTION IV. THE CRYSTAL STRUCTURE OF (+)589-OXALATOBIS(ETHYLENEDIAMINE)COBALT(III) HYDROGEN-d-TARTRATE MONOHYDRATE
Authors: Kuramoto Masahiro , Kushi Yoshihiko , Yoneda Hayami
Published: July 2006

The crystal structure of the title compound has been determined by X-ray analysis. It has been found that, in the diastereoisomer (+)589-[Co(ox)(en)2]H-d-tart·H2O, the optically active complex cation is locked by the {H-d-tart}∞ units of the right-handed spiral chain structure along the b-axis.
CYCLIZATION OF POLYENES XXI. SYNTHESIS OF Dl-INCENSOLE
Authors: Kato Tadahiro , YEN Chin Chung , Kobayashi Toyohiko , Kitahara Yoshio
Published: July 2006

By treatment of dl-mukulol (III) with tetrabromocyclohexadienone (V, TBCO), bromo ether (VI) was obtained. The ether (VI) was converted to dl-incensole (IV) by the sequential reactions of isomerization with BF3-etherate, replacement of bromine atom of VII with OAc group followed by reduction with LiAlH4.
REACTIONS OF CYCLOPROPENIUM IONS WITH IMINOPYRIDINIUM YLIDES
Authors: Inoue Shinichi , Yasuda Gorou , Hori Takuya
Published: July 2006

The reaction of heteroatom-substituted cyclopropenium ions (1) with iminopyridinium ylides (2) gave cyclopropenimine derivatives (3 and 4).
PREPARATIVE SEPARATION OF CIS- AND TRANS-1,2-DIAMINOCYCLOHEXANE MIXTURE BY MEANS OF THE SELECTIVE NICKEL(II) COMPLEX FORMATION
Authors: Saito Reiko , Kidani Yoshinori
Published: July 2006

The preparative separation method of cis- and trans-1,2-diaminocyclohexane (cis- and trans-dac) of commercially available dac preparations is reported by means of the selective complex formation of each dac with Ni(II) ions. cis- and trans-dac were separated as yellow Ni (cis-dac)2Cl2 and violet Ni(trans-dac)2(H2O)2Cl2 complexes respectively, which were precipitated preferentially under the appropriate conditions.
NICKEL-PHOSPHINE COMPLEX-CATALYZED GRIGNARD COUPLING OF β-BROMOVINYL ETHYL ETHER: A NEW TYPE OF FUNCTIONALIZED TWO-CARBON HOMOLOGATION OF GRIGNARD REAGENTS
Authors: Tamao Kohei , Zembayashi Michio , Kumada Makoto
Published: July 2006

β-Bromovinyl ethyl ether smoothly couples with Grignard reagents in the presence of [Ni(dppp)Cl2] as a catalyst to give the corresponding alkylated and arylated vinyl ethers in good yields. This reaction provides a new one-step, functionalized two-carbon homologation of Grignard reagents.
BIOTRANSFORMATION OF MONOTERPENES BY TOBACCO TISSUE CULTURES. SELECTIVE HYDROXYLATION OF TRANS-METHYL GROUP IN ISOPROPYRIDENE GROUP
Authors: Suga Takayuki , Hirata Toshifumi , Hirano Yoshio , Ito Takashi
Published: July 2006

The callus cultures of Nicotiana tabacum “Bright Yellow” are capable of transforming selectively the trans-methyl group in the isopropyridene group of linalool (I) and its derivatives, (V), (VI), and (VII), into the hydroxymethyl group.
PHOTOREDUCTION OF METHYLENE BLUE BOUND TO SODIUM DODECYLE SULFATE MICELLES
Authors: Usui Yoshiharu , Kodera Setsuko , Nishida Yoshiyuki
Published: July 2006

Photochemical reduction of methylene blue bound to sodium dodecyl sulfate micelles is inhibited in a given concentration range of a reductant (EDTA). The concentration dependence of EDTA on the quantum yield shows a sigmoidal type, which is explained by the mechanistic interpretations consisting of the ionic strength effect and the essential concentration effect of EDTA.
BRIDGED RADICALS IN THE REACTION OF SODIUM DIHYDRONAPHTHYLIDE WITH GEM-DICHLORIDES
Authors: Singh P R , Jayaraman B
Published: July 2006

The reactions of sodium dihydronaphthylide with dichlorodiphenylmethane and 9,9-dichlorofluorene in THF at 0°C have been found to proceed by an electron transfer mechanism involving α-chloro radicals, vicinal-dichlorides and an equilibrating pair of classical and bridged β-chloro radicals.
NITROGEN MONOXIDE CHEMISORPTION ON EVAPORATED NICKEL SURFACE BY INFRARED REFLECTANCE SPECTROSCOPY
Authors: Ito Masatoki , Kato Tohru , Suëtaka Wataru
Published: July 2006

Nitrogen monoxide chemisorbed on an evaporated nickel surface has been investigated by the IR high sensitivity reflection method combined with thermal desorption technique. The 1810 cm−1 band may be due to strongly chemisorbed monomer species on nickel surface, while the 1865 cm−1 be assigned to the weakly adsorbed dimer (NO)2 species on the oxidized nickel surface.
AN ALTERNATIVE SYNTHESIS OF PROSTAGLANDIN INTERMEDIATES
Authors: Kobayashi Makiko , Kurozumi Seizi , Toru Takeshi , Ishimoto Sachio
Published: July 2006

An alternative synthesis of prostaglandin intermediates, 2-substituted 4-hydroxycyclopent-2-en-1-one (5a) and (5b), from readily available lactone (1) is described.
STRUCTURAL STUDY OF OPTICAL RESOLUTION I. THE CRYSTAL STRUCTURE OF TRIS(ETHYLENEDIAMINE)COBALT(III) BROMIDE d-TARTRATE PENTAHYDRATE
Authors: Kushi Yoshihiko , Kuramoto Masahiro , Yoneda Hayami
Published: July 2006

The crystal structure of the title compound has been determined by X-ray analysis. The absolute configuration of the complex cation is found to be Λ-δδδ. In the crystal four oxygen atoms of the tartrate anion face the three axial N–H hydrogen atoms of the complex cation and the bromide anion is placed underneath the three axial N–H hydrogen atoms of the reverse side. Thus, around the complex cation the local “[Co(en)3]Br·d-tart” block is formed.
SPIN-LABELED METACHROMATIC DYES. I. ESR AND SOME OPTICAL PROPERTIES OF SPIN-LABELED PROFLAVINE IN SOLUTION, LIQUID CRYSTAL, AND STRETCHED FILM
Authors: Yamaoka Kiwamu , Noji Sumihare
Published: July 2006

Proflavine was spin-labeled with a stable nitroxyl radical for the study of metachromasy. The magnetic and optical properties of the spin-labeled dye were determined in aqueous solutions (isotropic) and oriented media (anisotropic) by ESR and light absorption. The interaction with the sodium dodecylsulfate micelle was also shown.
SOLVENT EFFECT ON THE BACKBONE REARRANGEMENT OF 3β,4β-EPOXYSHIONANE CATALYZED BY BORON TRIFLUORIDE ETHERATE
Authors: Tori Motoo , Tachibana Kazuo , Moriyama Yoshihiko , Tsuyuki Takahiko , Takahashi Takeyoshi
Published: July 2006

3β,4β-Epoxyshionane (3) was treated with BF3–Et2O in ether to give D:B-friedo-bacchar-5-en-3β-ol (7), D:B-friedo-bacehar-5(10)-en-3β-ol (8), D:C-friedo-bacchar-7-en-3β-ol (9), and 4α-fluoroshionan-3β-ol (10), besides previously reported dihydrobaccharis oxide (1), while the reaction in the solvents such as nitromethane, benzene, toluene, hexane, and acetonitrile gave no 1. In the reaction in THF at room temperature, the D:B-friedo-type products (7 and 8) were formed predominantly. The rearrangement in solvents with low nucleophilicity proceeded up to C/D rings; e.g. the reaction in nitromethane at room temperature yielded bacchar-12-en-3β-ol (2) and D:C-friedo-bacchar-8-en-3β-ol (11). The reaction product ratio in the same reaction in various solvents are listed in TABLE.
PHOTOREDUCTION OF PHENAZINE BY CONTINUOUS LIGHT ILLUMINATION IN AQUEOUS SULFURIC ACID SOLUTION
Authors: Kawata Hiroki , Niizuma Shigeya , Kokubun Hiroshi
Published: July 2006

Phenazinium monocation was found to be converted into dihydrophena zine cation radical through 1(ππ*) state by photoreduction with the quantum yield of 0.50 and 0.28 in aerated and deaerated aqueous sulfuric acid solutions, respectively, accompanying with the water decomposition followed by the formation of hydrogen peroxide. In the presence of oxygen, the photoproduct changes to 1-hydroxyphenazine by the dark reaction.
REACTION OF KETENIMINE AND SULFUR DIIMIDE
Authors: Murai Nobuyuki , Komatsu Mitsuo , Ohshiro Yoshiki , Agawa Toshio
Published: July 2006

The reaction of diphenylketene-N-phenylimine (1) and diphenylsulfur diimide (2) gave the 2-aminoindole 4 as a major product together with the benzothiatriazepine 3 and the amidine 5.
THE NEW DAPHNIPHYLLUM ALKALOIDS, DEOXYYUZURIMINE AND ISODAPHNILACTONE-B
Authors: Yamamura Shosuke , Terada Yukimasa
Published: July 2006

Two new alkaloids, deoxyyuzurimine (2) and isodaphnilactone-B (3), have been isolated from the plant Daphniphyllaceae, and their structures also been elucidated on the basis of their spectral data. From a biogenetic point of view, particularly, the latter is interesting.
NEW PROCESS FOR THERMOCHEMICAL HYDROGEN PRODUCTION
Authors: Miura Norio , Yamazoe Noboru , Seiyama Tetsuro
Published: July 2006

A new water splitting process, “Sb–I Process”, was proposed from the simple search method. This process consists of three reactions which proceed to an acceptable degree.
THE QUENCHING OF THE ZINC RESONANCE RADIATION AT 307.6 nm BY HYDROGEN AND METHANE
Authors: Yamamoto Shunzo , Takei Takashi , Nishimura Norio , Hasegawa Shigeo
Published: July 2006

The intensity of the 307.6 nm resonance line of zinc, Zn(3P1) → Zn(1S0) + hν, was measured at different pressures of H2, D2, and CH4, and the quenching rate constant was calculated on the basis of the Stern-Volmer plot. The quenching cross sections for H2, D2, and CH4 are 13.6, 11.3, and 0.164 A2. These values were compared to those for mercury and cadmium.
CO-PYROLYSIS OF 3,4-DICHLORO-1-BUTENE AND METHANOL ON ACTIVATED ALUMINA
Authors: Shinoda Kiyonori
Published: July 2006

The co-pyrolysis of 3,4-dichloro-1-butene (3,4-DCB-1) and methanol on activated alumina was carried out at 230°C. The reaction products contained a significant amount of methoxy-compounds as well as the dehydrochlorinated and isomerized compounds.
PHOTO-REACTIONS OF SULFINAMIDES
Authors: Tsuda Hiromi , Minato Hiroshi , Kobayashi Michio
Published: July 2006

p-Toluenesulfinamides were irradiated with a low-pressure mercury lamp. In methanol, photo-alcoholysis took place, yielding methyl sulfinates. In aprotic solvents (benzene, acetonitrile), homolysis of the S–N bond took place, and the products of recombination and disproportionation of sulfinyl radicals were found. Photo-isomerization to a sulfoxide was also observed.
STRUCTURE OF A CHELATE YLIDE COMPLEX: DICHLORO(BENZOYLMETHYLENEDIPHENYL-2-DIPHENYLPHOSPHINOETHYLPHOSPHORANE)PALLADIUM
Authors: Takahashi Hirofumi , Oosawa Yoshinao , Kobayashi Akiko , Saito Taro , Sasaki Yukiyoshi
Published: July 2006

X-ray structure analysis of dichloro(benzoylmethylenediphenyl-2-diphenylphosphinoethylphosphorane)palladium indicates that the ylide carbon, the phosphine phosphorus and two chlorine atoms coordinate to palladium forming a square planar configuration.
THE PHOTOCHEMICAL REACTION OF 2,5-DIPHENYL-1,3,4-OXADIAZOLE WITH INDAZOLES
Authors: Oe Koji , Tashiro Masashi , Tsuge Otohiko
Published: July 2006

The novel photo-induced reaction of 2,5-diphenyl-1,3,4-oxadiazole (1) with indazoles (2a–2d), which gave the benzoylhydrazones of benzoylindazoles, is described.
A NOVEL SYNTHETIC ROUTE TO MONOHYDRIDOPLATINUM(II) COMPLEXES VIA A DIHYDRIDOPLATINUM(II) SPECIES
Authors: Miyamoto Takeshi , Sasaki Yukiyoshi
Published: July 2006

A series of hydride complexes, PtHX(PBz3)2 or [PtHL(PBz3)2]+Y− (X=NO3, Cl, Br or I. L=NH3, PPh3, AsPh3 or SbPh3. Y=BPh4, ClO4 or tosyl.), has been prepared by a novel synthetic path via a dihydridoplatinum(II) species.
TRANSLATIONAL ENERGY OF THE EXCITED HYDROGEN ATOM PRODUCED BY CONTROLLED ELECTRON IMPACT (300 eV) ON HYDROGEN CHLORIDE AND WATER
Authors: Ogawa Teiichiro , Masumoto Fumikazu , Ishibashi Nobuhiko
Published: July 2006

The emission of the Balmer β line by 300 eV electrons were measured by use of a Fabry–Perot etalon. The translational energies of H and D atoms (n = 4) were determined by its Doppler width.

HCl 7.3±0.2 eV, DCl 7.5±0.2 eV,

H2O 2.3±0.2 eV, D2O 3.1±0.2 eV.
CYCLIZATION OF POLYENES XVII . SYNTHESIS AND PHEROMONE ACTIVITY OF Dl-NEOCEMBRENE
Authors: Kitahara Yoshio , Kato Tadahiro , Kobayashi Toyohiko , Moore Barry P
Published: July 2006

Neocembrene (4), a scent trail pheromone isolated recently by one of us (B. P. M.) from Australian termites, was synthesized in a dl-form starting from chloroketone (2), which was obtained from trans geranyl geranic acid chloride (1) by biogenetic type reaction. dl-Neocembrene exhibited the pheromone activity of the same order as that of the natural pheromone.
PHOTOREACTIONS OF HETEROAROMATIC COMPOUNDS VI. EFFECTS OF COORDINATING METAL IONS ON THE PHOTOREACTION OF 2-PYRIDINECARBOXYLATE IN AQUEOUS SOLUTIONS
Authors: Kimura Tsutomu , Kamimura Junji , Takada Kotaro , Sugimori Akira
Published: July 2006

Coordinating iron(III) to 2-pyridinecarboxylate brings about the photochemical formation of 2,2′-bipyridine and pyridine. Coupled oxidation and reduction between 2-pyridinecarboxylate and copper(II) gives 2-hydroxypyridine and copper(0).
SELECTIVE ORTHO-WALLACH REARRANGEMENT OF 1:1 COMPLEX OF AZOXYBENZENES WITH SbCl5
Authors: Yamamoto Jiro , Nishigaki Yukihiro , Imagawa Masahiro , Umezu Masahiro , Matsuura Teruo
Published: July 2006

Treatment of azoxybenzenes with SbCl5 gave crystalline 1:1 complexes, which on heating underwent selective ortho-Wallach rearrangement to yield exclusively o-hydroxyazobenzenes.
STEREOSELECTIVE SYNTHESIS OF OPTICALLY ACTIVE MANICONES: ALARM PHEROMONE OF ANT
Authors: Banno Kazuo , Mukaiyama Teruaki
Published: July 2006

(+)- and (−)-Manicone, (+)-(6S)- and (−)-(6R)-(4E)-4,6-dimethyl-4-octen-3-one, were synthesized in good yields by the TiCl4-promoted reaction of 3-trimethylsiloxy-2-pentene with (+)-(2S)- or (−)-(2R)-2-methylbutanal.
SELECTIVE BROMINATION OF POLYOLEFINS
Authors: Kitahara Yoshio , Kato Tadahiro , Ichinose Isao
Published: July 2006

Although the reaction mechanism is obscure at present, 2,4,4,6-tetrabromo-2,5-cyclohexadien-1-one (2) was found to be a good reagent for the selective bromination of polyenes, that is, terminal double bond of geranyl and farnesyl cyanides was selectively brominated by merely being stirred with equimolar amount of 2 in CH2Cl2 solution, giving 6,7-dibromogeranyl (yield 98%) and 10,11-dibromofarnesyl (yield 65%) cyanide, respectively.
REACTION OF o-ACYLPHENYLDIAZOMETHANE I. FORMATION OF 1-ALKOXYISOBENZOFURANS BY INTRAMOLECULAR CARBENIC REACTION
Authors: Hamaguchi Masashi , Ibata Toshikazu
Published: July 2006

1-Methoxyisobenzofurans were generated as the transient intermediate in the Cu(acac)2 catalyzed decomposition of methyl o-diazomethylbenzoate. The intermediates were confirmed by trapping with dienophiles or alcohols to give Diels–Alder adducts and cyclic orthobenzoates (4), respectively.
INTERACTION BETWEEN DYES AND POLYELECTROLYTES III. STRUCTURAL EFFECT OF POLYANIONS ON THE FORMATION OF AGGREGATED METHYLENE BLUE
Authors: Shirai Masamitsu , Nagatsuka Tatsuki , Tanaka Makoto
Published: July 2006

Effects of the structures of polyvinylsulfate and its homologues on the aggregation of methylene blue were studied in aqueous solution. Important factors were the number of anionic site per polymer molecule and the flexibility of polymer chain.
METAL-CATALYZED ORGANIC PHOTOREACTIONS 1,4-ADDITION OF METHANOL TO α, β -UNSATURATED KETONES OR ALDEHYDE
Authors: Sato Tadashi , Ito Osamu , Miyahara Masayuki
Published: July 2006

α,β-Unsaturated ketones or aldehyde, upon irradiation in methanol in the presence of UO2Cl2, afforded cyclic acetals or compound derived therefrom, with the bond formation between β-carbon atom of unsaturated carbonyl compounds and methanol carbon atom.
A NOVEL TETRAMETHYLTHIOUREA-CATALYZED DECOMPOSITION OF STABILIZED SELENONIUM YLIDES
Authors: Tamagaki Seizo , Hatanaka Isao
Published: July 2006

A few stabilized selenonium ylides react with a catalytic amount of tetramethylthiourea in the presence of acetic acid at room temperature to give the corresponding selenides and olefins in good yields.
STRUCTURAL STUDY OF OPTICAL RESOLUTION II. THE CRYSTAL STRUCTURE OF LITHIUM TRIS(ETHYLENEDIAMINE)CHROMIUM(III) d-TARTRATE TRIHYDRATE
Authors: Kushi Yoshihiko , Kuramoto Masahiro , Yoneda Hayami
Published: July 2006

It has been found that, in the crystal of Li(+)589-[Cr(en)3] (d-tart)2·3H2O, the complex cation Λ-δδδ-[Cr(en)3]3+ is sandwiched between two crystallographically different d-tartrate anions. The centers of the both anions are located on the threefold axis of the octahedral complex cation and the characteristic local “[Cr(en)3] (d-tart)2” block is formed. The structural feature of this local block bears a close resemblance to that found in (+)589-[Co(en)3] Br·d-tart·5H2O.
SELECTIVE HYDROGENATION OF 1,3-BUTADIENE OVER ALKALINE EARTH METAL OXIDES
Authors: Tanaka Yasutaka , Hattori Hideshi , Tanabe Kozo
Published: July 2006

1,3-Butadiene was selectively hydrogenated to butenes without further hydrogenation to butane over MgO, CaO, SrO, and BaO. The oxides showed their maximum activity when evacuated around 800–1000°C, and the maximum activity increased in the order of BeO<<BaO<MgO<SrO<CaO.
DIOXYGEN COMPLEXES OF NICKEL(I) BOUND TO POLYMERS
Authors: Chimura Yasuo , Beppu Masazo , Yoshida Satohiro , Tarama Kimio
Published: July 2006

Three polymer-bound Ni(I) complexes were prepared; polymer complex I was prepared from NiBr(P(C6H5)3)3 and resin-substituted triphenylphosphine (polymer I), polymer complex II was from NiBr(P(C6H5)3)3 and resin-substituted pyridine (polymer II), and polymer complex III was from Na[Ni(salen)] and resin-substituted methyltriphenylphosphonium bromide (polymer III). Under atmospheric oxygen these complexes showed esr signals (g⁄⁄= 2.035–2.037, g⊥ = 2.002–2.003), which were attributed to new dioxygen complexes of Ni(I). Their electronic structures should be formally described as Ni(II)–O2−.
AMINOMERCURATION XIII. ALLENES AMINATION
Authors: Hodjat-Kachani H , Perie J J , Lattes A
Published: July 2006

Aminomercuration of allenes makes available a new route to ethylenic arylamines, a reaction which affords the easy insertion of the chain (Remark: Graphics omitted.) either at the nitrogen atom (ilamycin analogs) or at the ortho position of secondary aromatic amines. Scope and limitations are given.
THE CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTRA OF THE 1R(S),3S(R),8R(S),10S(R)- AND 1S(R),3R(S),8R(S),10S(R)-3,5,7,7,10,12,14,14-OCTAMETHYL-1,4,8,11-TETRAAZACYCLOTETRADECA-4,11-DIENENICKEL(II) COMPLEXES
Authors: Ito Tasuku , Soma Kazuhiro , Watanabe Masanobu
Published: July 2006

The carbon 13 nuclear magnetic resonance spectra of the title compounds were measured in aqueous solutions with Fourier-Transform NMR method. The resonance lines were assigned on the basis of off-resonance decoupling, selective proton decoupling, and comparison of the spectra with those of the stereospecifically deuterated derivatives.
THE PHOTOCHEMICAL REACTION OF 3,4,5-TRIPHENYL-4-OXAZOLIN-2-ONE
Authors: Tsuge Otohiko , Oe Koji , Ueyama Yasuo
Published: July 2006

Irradiation of 3,4,5-triphenyl-4-oxazolin-2-one (1) in benzene, under nitrogen, with or without iodine gave benzanilide and phenanthroxazolinone 2. However, in the presence of oxygen 1 was photochemically converted to benzanilide, benzoic acid, and benzamidobenzophenones. This photooxygenation is interpreted by the pathway proceeding via an initial attack of singlet oxygen to 1 forming a dioxetane, followed by ring cleavage to yield N,N-dibenzoylaniline (6) which gives final products.
PHOTO-REACTION OF AZOXYSULFONES. A NOVEL PHOTO-REARRANGEMENT
Authors: Kobayashi Michio , Ochiai Kunihiro , Minato Hiroshi
Published: July 2006

Photolysis of arylazoxy p-tolyl sulfones was investigated. A reaction mechanism proposed involves photo-rearrangement to arenediazonium sulfonates and subsequent generation of aryl free radicals.
HETEROGENEOUS CODIMERIZATION OF ACETYLENES AND ALLYL HALIDES WITH POLYMER-SUPPORTED PdCl2 CATALYST
Authors: Kaneda Kiyotomi , Uchiyama Tetsuya , Terasawa Masami , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

The reaction of acetylenes and allyl halides using polymer-supported PdCl2 complex was carried out at room temperature for 48 hr. Codimerization products, 1,4-pentadiene derivatives, could be obtained in high yields. The catalytic behavior of the heterogeneous polymer Pd complex was compared with that of the homogeneous complex.
A CONVENIENT METHOD FOR THE REDUCTION OF 1-(2-OXOALKYL)PYRIDINIUM SALTS
Authors: Takeda Takeshi , Mukaiyama Teruaki
Published: July 2006

1-(2-Oxoalkyl)pyridinium salts were reduced to the corresponding ketones in high yields by the photochemical reaction with thiol in the presence of carbon disulfide.
REACTION OF gem-DIHALIDES WITH NICKEL(O) COMPLEXES: SELECTIVE METHYLENE INSERTION INTO C–H BOND OF OLEFINS
Authors: Takahashi Shigetoshi , Suzuki Yoshiaki , Sonogashira Kenkichi , Hagihara Nobue
Published: July 2006

The reaction between methylene dihalides and ethylene assisted by the nickel(O)-triphenylphosphine complex has been found to give propylene, which was formed by selective methylene insertion into the olefinic C–H bond of ethylene. Similarly propylene and methylene dibromide gave isobutylene.
THE ISOLATION OF FAC(N)-d-ASPARTATO-l-ASPARAGINATOCOBALT(III) COMPLEX
Authors: Takenaka Hideto , Shibata Muraji
Published: July 2006

An isomeric complex of cobalt(III) containing a d-aspartate ion and a l-asparaginate ion as tridentate ligands has been isolated and identified as fac(N) isomer on the basis of IR, PMR and absorption spectra. The absorption spectrum in an alkaline solution revealed double maxima in the second absorption band region.
THE MAGNETIC CIRCULAR DICHROISM SPECTRUM OF AZULENOD[1,2,3-cd]PHENALENE
Authors: Tajiri Akio , Hatano Masahiro , Murata Ichiro , Nakasuji Kazuhiro
Published: July 2006

The magnetic circular dichroism (MCD) spectrum of azuleno[1,2,3-cd]phenalene was measured, at room temperature, in the wavelength region of 1000 nm to 200 nm. The compound showed the Faraday B terms in the MCD spectrum caused by a magnetic coupling of the low-lying non-degenerate electronic states. A careful inspection of the MCD spectrum with the aid of its quantum mechanical calculations led to preferable spectroscopic assignments of the complicated absorption bands of azuleno[1,2,3-cd]phenalene.
SIMPLE SYNTHESIS OF THE CONTINUOUS SiC FIBER WITH HIGH TENSILE STRENGTH
Authors: Yajima Seishi , Omori Mamoru , Hayashi Josaburo , Okamura Kiyohito , Matsuzawa Takao , Liaw Chiu-fong
Published: July 2006

A polycarbosilane, the starting material of β-SiC fibers, was prepared without autoclave. The new method is simple and more economical than the previous one. Furthermore, a great number of bundles of SiC fibers were obtained by way of oxidative reactions of polycarbosilane fibers.
DIRECT GLUCOSIDATION OF TETRA-O-BENZYL-α-d-GLUCOSE BY DICHLOROSILANE-SILVER SULFONATE SYSTEM
Authors: Koto Shinkiti , Morishima Naohiko , Zen Shonosuke
Published: July 2006

A system of dichlorodiphenylsilane - silver sulfonate has been found to be of use for the direct glucosidation of 2,3,4,6-tetra-O-benzyl-α-d-glucopyranose. Efficient synthesis of trehaloses with the system is described.
A NEW SOURCE OF OPTICAL ACTIVITY IN COORDINATION CHEMISTRY
Authors: Nakano Yoshiharu , Seki Hitoshi
Published: July 2006

An optically active complex of which chirality is due to restricted rotation of a remote group was prepared and resolved.
SYNTHESIS OF ALKYL HALIDES FROM ALCOHOLS BY THE REACTION WITH 2-ALKOXY-3-ETHYL BENZOTHIAZOLIUM SALTS
Authors: Hojo Ko , Mukaiyama Teruaki
Published: July 2006

2-Alkoxybenzothiazolium salts, formed in situ from 2-fluorobenzothiazolium salt and alcohols, reacted with iodide, bromide, and chloride ion to give the corresponding alkyl halides in good yields. The present procedure afforded a convenient method for the preparation of highly optically active alkyl halides such as 2-halooctanes.
THERMAL HYDROGEN TRANSFER FROM ALCOHOLS TO TETRACYANOETHYLENE
Authors: Nishiguchi Takeshi , Sakakibara Hiromitsu , Fukuzumi Kazuo
Published: July 2006

Hydrogen transferred thermally from several organic compounds such as alkylarylcarbinols, tetrahydroquinoline, and 2,5-dihydrofuran to tetracyanoethylene. The mechanism of the hydrogen transfer from the alcohols was investigated.
INTERMEDIATE IN AMMOXIDATION OF TOLUENE INTO BENZONITRILE
Authors: Niwa Miki , Ando Hiroshi , Murakami Yuichi
Published: July 2006

Ammoxidation of toluene into benzonitrile on V2O5/Al2O3 proceeds via an adsorbed benzoate ion as the reaction intermediate.
SYNTHESIS OF DEISOVALERYLBLASTMYCIN
Authors: Aburaki Shinpei , Kinoshita Mitsuhiro
Published: July 2006

Methyl 3-O-benzoyl-2-C-butyl-2,5-dideoxy–β-l-arabinofuranoside (1) was converted to (2R,3R,4S)-4-(N-benzyloxycarbonyl-l-threonyloxy)-3-benzyloxy-2-butylpentanoic acid (8). Lactonization of 8 was conducted through the 2-pyridylthio ester 9 activated by silver perchlorate to afford the desired dilactone 10 (33% yield), which was transformed to the title compound.
NEW METHOD FOR KETONE SYNTHESIS
Authors: Saigo Kazuhiko , Kawata Ken , Mukaiyama Teruaki
Published: July 2006

Various ketones, including unsymmetrical ones, were prepared in good yields starting from aldehydes and Grignard reagents by utilizing the method for the oxidation of alkoxymagnesium bromide with N-chlorosuccinimide.
CATALYTIC ENANTIOSELECTION BY CHIRAL TRANSITION–METAL COMPLEXES. II. DEHYDROGENATION OF RACEMIC 1-PHENYLETHANOL BY in situ PREPARED RhCl((+)-neomenthyldiphenylphosphine)3 COMPLEX
Authors: Ohkubo Katsutoshi , Ohgushi Tsutomu , Yoshinaga Kohji
Published: July 2006

The magnitude of the enantioselection of racemic 1-phenylethanol by RhCl((+)-neomenthyldiphenylphosphine)3 prepared in situ from (RhCl (CH2=CH2)2)2 and the chiral phosphine was the greatest around [phosphine]0/[(RhCl(CH2=CH2)2)2]≅6 and was considerably elevated by the addition of unsaturated ketones and by lowering the reaction temperature.
SINTERING OF MAGNESIUM OXIDE PREPARED BY ALKOXY-METHOD
Authors: Yamaguchi Osamu , Tonami Hitoshi , Shimizu Kiyoshi
Published: July 2006

Magnesium oxide was prepared by the alkoxy-method, and its sinterability was studied. Compact specimens exceeding 96 % of bulk density were obtained by sintering at 1200°C for 3 h.
STUDIES ON THE REACTIONS OF BIS(ACETYLACETONATO)PLATINUM (II) WITH LEWIS BASES. III. FORMATION OF NON-CHELATED, O-BONDED ACETYLACETONATO COMPLEX, [Pt(ACETYLACETONATO-O)2(PEt3)2]
Authors: Ito Takashi , Kiriyama Takashi , Yamamoto Akio
Published: July 2006

Bis(acetylacetonato)platinum(II) reacted with triethylphosphine (PEt3) in diethyl ether at low temperature to yield [Pt(C5H7O2)2(PEt3)2], 1, which was isolated and characterized on the basis of IR and H-NMR spectroscopy and elemental analysis. Complex 1 represents the first example of the transition metal complex which possesses singly O-bonded acetylacetonato ligands.
CLEAVAGE OF CARBON–HALOGEN BOND BY THE HYDROGEN TRANSFER FROM ORGANIC COMPOUNDS CATALYZED BY NOBLE METAL SALTS
Authors: Imai Hideaki , Nishiguchi Takeshi , Tanaka Motoo , Fukuzumi Kazuo
Published: July 2006

In the presence of noble metal salts, especially Pd(II) salts, the carbon–halogen bond of aryl halides underwent hydrogenolysis with organic hydrogen donors such as indoline and tetrahydroquinoline, and the corresponding aryl compounds and hydrogen halides were formed. The addition of bases promoted the hydrogenolysis.
OPTICAL INTERCONVERSION OF ENANTIOMERIC SECONDARY ALCOHOLS USING 2-FLUOROBENZOTHIAZOLIUM SALT
Authors: Mukaiyama Teruaki , Hojo Ko
Published: July 2006

A convenient method for optical interconversion of enantiomeric secondary alcohols was established according to the following procedures: treatment of optically active 2-alkyloxybenzothiazolium salt , formed in situ from 2-fluoro salt I and optically active secondary alcohols, with trichloroacetic acid to give the corresponding esters with inversion of configuration, and facile hydrolysis of the esters to alcohols with retention.
THERMAL SQUARE PLANAR-TO-OCTAHEDRAL TRANSFORMATION OF [Ni(bimd)4](NO3)2·2.5C2H5OH IN SOLID PHASE
Authors: Tsuchiya Ryokichi , Kyuno Eishin , Uehara Akira , Joba Seiji , Ohba Shigeki
Published: July 2006

The reaction involving the increase of the coordination number from four to six, viz, the transformation from square planar to octahedral was found in the benzimidazole complex, [Ni(bimd)4](NO3)2·2.5C2H5OH upon heating. The transformation was considered to be due to the approach of the nitrate ions toward the central ion along the vertical axis.
CHEMICAL SIMULATION OF TROPIC ACID BIOSYNTHESIS. STEREOSELECTIVE CHEMICAL CONVERSION OF OPTICALLY ACTIVE PHENYLALANINE TO (R)- AND (S)-TROPIC ACID
Authors: Yamada Shun-ichi , Koga Kenji , Juang Tzuoh Miin , Achiwa Kazuo
Published: July 2006

(R)- and (S)-tropic acid were prepared by trifluoroacetolysis of O-nitrobenzenesulfonate((S)-III) of optically active 3-phenyllactic acid ester(S)-II) in good yield and with high retention of optical purity according to the biosynthetic pathway starting from l-phenylalanine(l-I). Based on the above findings, natural (−)-littorine(VIII) and (−)-hyoscyamine(X) were synthesized from d-phenylalanine.
ALLYLSILANES AS SYNTHETIC INTERMEDIATES. II. SYNTHESES OF HOMOALLYL ETHERS FROM ALLYLSILANES AND ACETALS PROMOTED BY TITANIUM TETRACHLORIDE
Authors: Hosomi Akira , Endo Masahiko , Sakurai Hideki
Published: July 2006

The reaction of allylsilanes with acetals in the presence of titanium tetrachloride afforded homoallyl ethers in good yields. The reaction took place regiospecifically with transposition of the allyl group.
COLUMN-CHROMATOGRAPHIC STUDY ON THE ISOMERISM OF THE BIS(ETHYLENEDIAMINE) SARCOSINATOCOBALT(III) ION WITH TWO ASYMMETRIC CENTERS
Authors: Fujita Miho , Yoshikawa Yuzo , Yamatera Hideo
Published: July 2006

A column-chromatographic method has been successfully applied to the separation of all the four possible isomers of [Co(sar)(en)2]2+ (sar=CH3NHCH2COO−, en = H2NCH2CH2NH2), to the correlation of their absolute configuration, and to the determination of the difference in stability between the diastereomers (0.9 kcal/mol).
REACTION OF BIS (α-BROMOALKYL) SULFIDE WITH DIIRON NONACARBONYL
Authors: Koyanagi Tohru , Hayami Jun-ichi , Kaji Aritsune
Published: July 2006

An iron-stabilized thiocarbonyl ylide was generated by the reaction of bis(α-bromobenzyl) sulfide with diiron nonacarbonyl. This species was not a typical 1,3-dipole, but underwent a [2+4] type addition reaction with furan.
REACTIONS OF 11-OXYGENATED 17α-ACETYL-12α,13α-EPOXYETIOJERVANES WITH BORON TRIFLUORIDE ETHERATE
Authors: Murai Akio , Sasamori Hiroshi , Masamune Tadashi
Published: July 2006

Treatment of 11α-hydroxy-, 11α-acetoxy-, and 11-oxo-17α-acetyl-12α,13α-epoxyetiojervanes (1, 1a, and 11) with boron trifluoride etherate gave mixtures of several compounds, respectively, including interesting rearranged products, e.g., compounds (12 and 13) with bicyclo[3.3.1]nonane-2,9-dione and hydrooxepin moieties.
MICROWAVE SPECTRA OF ETHYLFLUOROSILANE
Authors: Hayashi Michiro , Hikino Hiroaki , Imachi Misako
Published: July 2006

Microwave spectra of the trans and gauche isomers of ethylfluorosilane (CH3CH2SiH2F) were measured and the rotational constants were determined for the ground and several excited vibrational states. The dipole moments were determined by Stark effect measurements to be 1.74 ± 0.02 D for trans and 1.71 ± 0.17 D for gauche. The observed splittings of the spectra in the first excited methyl torsional state of the gauche isomer gave the methyl internal rotation barrier as 2890 ± 60 cal/mol.
FACILE REDUCTION OF SELENOXIDE WITH PHOSPHINE SELENIDE
Authors: Sakaki Keishi , Oae Shigeru
Published: July 2006

Facile reduction of selenoxide with phosphine selenide gives corresponding selenide, phosphine oxide and elemental selenium and the reaction is presumed to proceed through substitution at the equatorial-equatorial position of phosphorus atom.
HIGHLY STEREOSELECTIVE SYNTHESES OF NEROL AND GERANIOL
Authors: Takabe Kunihiko , Katagiri Takao , Tanaka Juntaro
Published: July 2006

A highly stereoselective synthesis of nerol (1) was accomplished using the telomerization process of isoprene. Geraniol (2) was also synthesized from myrcene (3).
ELECTRON SPIN RESONANCE STUDY OF SPIN PROBES IN FROZEN AQUEOUS SOLUTIONS. II. ICE STRUCTURE BREAKING EFFECTS OF ALKALI HYDROXIDES
Authors: Sato Eiji , Uematsu Shogo , Akahori Yukio
Published: July 2006

The ESR spectra of 12-nitroxide stearic acid (12-NS) in frozen aqueous solutions of LiOH, KOH, and CsOH with temperature are composed of a sharp triplet and a broad singlet, as the case of frozen aqueous solutions of NaOH. As radius of alkali metal ion becomes larger, the strength of breaking ice structure increases at frozen state. The ice-structure-breaking effects of alkali ions are Cs+>K+>Na+>Li+ in frozen aqueous solutions.
POLYMERIZATION OF 3-VINYL-5,5-DIMETHYLHYDANTOIN IN WATER
Authors: Sashio Minoru , Hayashi Masao , Tabuchi Tateo , Tanaka Makoto
Published: July 2006

Polymerization of 3-vinyl-5,5-dimethylhydantoin was carried out in water. The resulting polymer was insoluble in all solvents tested, while the polymers obtained in organic solvents were soluble in N,N-dimethylformamide. Polymerizations in water containing water-soluble polymers gave the polymers in which the water-soluble polymers were entrapped.
RELATIVISTIC SELF-CONSISTENT MOLECULAR ORBITAL CALCULATION FOR UF6
Authors: Kim Bong-Il , Adachi Hirohiko , Imoto Shosuke
Published: July 2006

The relativistic self-consistent molecular orbital calculation was made for UF6 in the Dirac–Slater model. The one-electron energies, excitation energies and the effects of relativity are presented.
QUENCHING EFFECT OF OXIMES ON THE PHOTOLYSIS OF COPOLYMER OF STYRENE AND PHENYL VINYL KETONE
Authors: Tsunooka Masahiro , Nishino Todomu , Tanaka Makoto
Published: July 2006

In order to estimate the function of oximes as quenchers, their effect on the photolysis of copolymer of styrene and phenyl vinyl ketone was investigated in solution and in the solid phase. 2-Acetonaphthone oxime and benzylidene acetone oxime among the oximes examined in this paper were as effective as naphthalene, which is a well known quencher.
A NEW SYNTHESIS OF 2-(6-CARBOXYHEXYL)CYCLOPENT-2-EN-1-ONE, A PROSTANOID SYNTHON
Authors: Wada Eiji , Nakai Takeshi , Okawara Makoto
Published: July 2006

A new synthesis of the title compound (1), an useful intermediate in the synthesis of various prostanoids, is described which involves the acid-catalyzed cyclopropane rearrangement of 9-cyclopropyl-9-oxononanoic acid (7) as a key step. The cyclopropyl ketone 7 was prepared via the three steps from cyclopropyl methyl ketone.
IMPROVEMENT OF NLCKEL CATALYST FOR ENANTIOFACE-DIFFERENTIATING (ASYMMETRIC) HYDROGENATION OF METHYL ACETOACETATE
Authors: Harada Tadao , Onaka Shinji , Tai Akira , Izumi Yoshiharu
Published: July 2006

Among the factors affecting the optical yield of hydrogenation of methyl acetoacetate to optically active methyl 3-hydroxybutyrate with tartaric acid-modified nickel catalysts, the presence of aluminium or related metal compound on the catalysts was found to be the unfavorable one. The use of reduced nickel oxide instead of Raney nickel resulted in a good optical yield (maximum optical yield, 85%).
PALLADIUM(II) AND PLATINUM(II) COMPLEXES OF CIS-1,3-DIAMINOCYCLOHEXANE
Authors: Saito Reiko , Kidani Yoshinori
Published: July 2006

Six palladium(II) and platinum(II) complexes, [MX2(1,3-dac)] and [M(1,3-dac)2]Cl2 (M = Pd and Pt, X = Cl− and Br−) have newly been prepared (1,3-dac = cis-1,3-diaminocyclohexane). On the basis of the spectroscopic analyses, the structures of the complexes have been elucidated to be square planar. It was reasonably interpreted that interconversion of the ligand to the less stable diaxial conformer was taken place during complexation.
ROTATION OF A SPIN PROBE IN HYDRATED POLYETHYLENE GLYCOL BELOW FREEZING TEMPERATURE
Authors: Yoshioka Hisashi
Published: July 2006

The ESR spectra of a spin probe, 2,2,6,6-tetramethyl-4-piperidone N-oxide, in water-polyethylene glycol (PEG) systems were measured below freezing temperature. The activation energy of the rotation of the probe in the hydrated PEG was considerably large. It was explained in terms of the breaking of the hydrogen bonds of the hydration water.
SYNTHESIS OF HEPTAMETHYLTROPYLIUM PERCHLORATE FROM 1,2,3,4,5,6,7-HEPTAMETHYLTROPILIDENE
Authors: Takeuchi Ken’ichi , Yokomichi Yasunori , Okamoto Kunio
Published: July 2006

Heptamethyltropylium perchlorate has been synthesized via the reaction of 1,2,3,4,5,6,7-heptamethyltropilidene with phosphorus pentachloride and subsequent treatment with perchloric acid. The advantage of phosphorus pentachloride over triphenylcarbenium ion as a hydride-abstraction reagent is discussed.
ISOMERIZATION OF OXIRANES TO ALLYLIC ALCOHOLS WITH DIALKYLBORYL TRIFLUOROMETHANESULFONATES
Authors: Inoue Tan , Uchimaru Tadafumi , Mukaiyama Teruaki
Published: July 2006

Isomerization of oxiranes to allylic alcohols by treatment with dialkylboryl trifluoromethanesulfonates and tertiary amines is described. Several reactions proceed in regioselective manner.
METATHESIS OF OLEYL CHLORIDE
Authors: Nakamura Ryuichi , Echigoya Etsuro
Published: July 2006

The metathesis of oleyl chloride (1-chloro-cis-9-octadecene) with an alkene such as 1-hexene, 5-decence, 2-butene, etc., and the disproportionation of oleyl chloride were found to be effectively catalyzed by a modified or unmodified Re2O7–Al2O3 catalyst at ambient temperature. The activity of the modified catalyst with MexOy such as V2O5, MoO3, WO3, GeO2, Re2O7–MexOy–Al2O3, was very high even at low Re contents. This reaction should be important in a synthesis of telechelic compounds or bioactive substances for insects such as sex attractant pheromones.
THE MOLECULAR STRUCTURE OF 3-METHYL-6-AMINO-1,2,4-TRIAZIN-5(2H)-ONE MONOHYDRATE
Authors: Furusaki Akio , Matsumoto Takeshi , Sekikawa Isao
Published: July 2006

The molecular structure of the title compound has been studied by using three-dimensional X-ray counter data. The molecule is unusual in the point that the non-ionic canonical structure contributes scarcely to the resonance in it.
CATA-CONDENSED DIBENZOPENTALENYL DIANIONS
Authors: Uyehara Tadao , Honda Tsugio , Kitahara Yoshio
Published: July 2006

Nuclear magnetic resonance spectrum (1H) of dilithium indeno[1,2-a]indenide (2) and that of the [2,1-a]-isomer (4) indicate unique charge delocalization, which reflects that those dianions consist of two charge delocalized indenides.
DETECTION OF SPARINGLY-SOLUBLE REACTION INTERMEDIATES IN SOLUTION BY THE STOPPED-FLOW METHOD FOR THE SCATTERED LIGHT
Authors: Mochizuki Katsura , Imamura Taira , Ito Tasuku , Fujimoto Masatoshi
Published: July 2006

In the course of the reaction between Co2+ and 1-(2-pyridylazo)-2-naphthol (PAN) in aqueous dioxane media, the formation and the redissolution of neutral insoluble intermediate [CoII(PAN)2]0 are observed in the stopped-flow signals for the light scattered by the reaction mixture. This approach for the detection of such invisible precipitates is also applied to the reaction of Ni2+ with PAN.
ELECTRONIC STRUCTURE OF DINITROGEN PENTAOXIDE
Authors: Okada Kazuo , Yabushita Satoshi , Yamaguchi Kizashi , Fueno Takayuki
Published: July 2006

Conformation and electronic structure of dinitrogen pentaoxide N2O5 were investigated on the basis of the generalized Hartree–Fock (GHF) molecular orbital (MO) method. It was found that N2O5 possesses a zwitterionic as well as weak diradical character. The concept of this duality in character is of importance to the understanding of the electronic structure and chemical behavior of N2O5.
KINETIC STUDIES OF THE REACTION OF PROPYLENE OXIDE ONTO SILICA GEL BY MEANS OF POTENTIOMETRY
Authors: Ono Katsumichi , Okura Kazuhisa , Murakami Kenkichi
Published: July 2006

Propylene oxide was found to react easily with silica gel surfaces in the presence of water. The reaction obeyed second order kinetics with respect to the concentration of proton. Kinetic data suggested that propylene oxide was chemisorbed on the silica gel surfaces with ring opening.
FORMATION OF 1,3-DITHIOLYLIUM SALTS BY REACTION OF 2-ALKOXY- AND 2-ALKYLTHIO-1,3-DITHIOLES WITH TRITYL SALT
Authors: Nakayama Jyuzo , Fujiwara Kazuo , Imura Mimiko , Hoshino Masamatsu
Published: July 2006

The reaction of 2-alkoxy-1,3-dithioles with trityl tetrafluoroborate gave 1,3-dithiolylium tetrafluoroborates and alkoxytriphenylmethanes in excellent yields. Similarly, 2-alkylthio-1,3-dithioles reacted with trityl tetrafluoroborate to give 1,3-dithiolylium tetrafluoroborates and alkylthiotriphenylmethanes.
AN APPLICATION OF ELECTRON MICROPROBE AUGER SPECTROSCOPY TO THE STUDY OF SELECTIVELY OXIDIZED Cu-0.28 WT% Al ALLOY SURFACE
Authors: Hanji Katsumi , Shimizu Hazime , Ono Masatoshi , Homma Teiichi
Published: July 2006

Electron microprobe Auger spectroscopy study of the surface compositional changes of a Cu-0.28 wt% Al alloy in the initial oxidation revealed that aluminum was enriched on the surface due to its selective oxidation. The degree of its enrichment was not uniform and depended on a structure of grains and on whether places were inside grains or grain boundaries.
PREPARATION AND CHARACTERIZATION OF OXOMOLYBDENUM(V) -PORPHYRIN COMPLEXES
Authors: Matsuda Yoshihisa , Kubota Fukiko , Murakami Yukito
Published: July 2006

Oxomolybdenum(V) complexes of tetraphenylporphine and octaethylporphine, Mo(O) (OC2H5) (TPP) and Mo(O) (OEP)X (X = Cl or OCH3), were prepared from the corresponding porphyrins by reaction with molybdenum pentachloride. Both ESR and electronic spectra indicate that the complexes coordinated with an alkoxide group exist in dichloromethane or chloroform as a single monomeric species, while more than one species are present in aromatic solvents for each of the complexes.
DIRECT SYNTHESES OF TERMINAL OLEFINS FROM THE REACTION OF 1-CHLOROMETHYLTRIMETHYLSILANE AND KETONES
Authors: Sekiguchi Akira , Ando Wataru
Published: July 2006

The reactions of ketones with 1-chloromethyltrimethylsilane in the presence of triphenylphosphine gave terminal olefins in good yields. The terminal olefins are formed through the Wittig type reactions of methylenetriphenylphosphorane with ketones.
BEHAVIOR OF ANTHRAQUINOID ACID DYES IN AQUEOUS SOLUTION OF SODIUM DODECYL SULFATE
Authors: Tuong Tran Dinh , Otsuka Kenji , Hayano Shigeo
Published: July 2006

The behavior of an anthraquinoid acid dye in an aqueous solution of an anionic surfactant,sodium dodecyl sulfate,was investigated by electronic spectroscopy and gel permeation chromatography. The experimental findings suggest that above the cmc, one dye molecule is associated with one surfactant micelle.
SYNTHESIS OF ULOSES BY THE OXIDATION WITH DIMETHYL SULFOXIDE-TRIFLUOROACETIC ANHYDRIDE
Authors: Yoshimura Juji , Sato Ken-ichi , Hashimoto Hironobu
Published: July 2006

Application of dimethyl sulfoxide-trifluoroacetic anhydride for the oxidation of an isolated hydroxyl group of partially protected carbohydrates gave uloses in good yields, and for that of 2,3-dihydroxyl groups of d-glucosides followed by the reaction with carbonyl reagents gave easily 2,3-diulose derivatives.
REACTION OF ORGANOMETALLIC COMPOUNDS UNDER HIGH PRESSURE. I. THE EFFECT OF PRESSURE ON THE INSERTION REACTIONS OF ALKYNES INTO trans-CHLOROHYDRIDO-BIS(TRIETHYLPHOSPHINE)PLATINUM(II)
Authors: Joh Takashi , Hagihara Nobue
Published: July 2006

The influence of pressure on the insertion reactions of alkynes into trans-chlorohydrido-bis(triethylphosphine)platinum(II) was investigated under high pressures up to 10,000 kg/cm2. It was found that the insertion reactions of alkynes into H–Pt(II) bond were generally accelerated with increasing pressure and the influence of pressure was remarkable in the reactions which proceeded via an ionic intermediate. In some cases change of reaction mechanisms by the pressure changes was observed.
OPTICAL EXCITATION IN COLLISIONS OF Ar+ AND He+ IONS WITH CS2
Authors: Tsuji Masaharu , Fukutome Hisao , Nishimura Yukio
Published: July 2006

By the impact of Ar+ or He+ ion beam of 2–3 keV, CS2 exibits similar spectra, although the recombination energies of Ar+ and He+ ions are very different: the intense \~{B}-\~{X} system of CS2+ and the weak A-X system of CS. The observed data are inconsistent with the predictions from the energy defect and Massey’s adiabatic parameter. But the charge-exchange reactions can be explained by the Franck–Condon principle.
A DIRECT SYNTHESIS OF CARBAMIC ESTER FROM CARBON DIOXIDE, VINYL ETHER AND AMINE
Authors: Yoshida Yasuhiko , Inoue Shohei
Published: July 2006

1-Ethoxyethyl carbamate was obtained directly by the reaction of ethyl vinyl ether with carbon dioxide and amine such as dimethylamine and diethylamine.
A NOVEL FRAGMENTATION REACTION OF AN α,β-EPOXYCYCLOPENTANONE. STEREOSELECTIVE FORMATION OF TRISUBSTITUTED E-DOUBLE BOND
Authors: Tsuzuki Kazuo , Hashimoto Hisanobu , Shirahama Haruhisa , Matsumoto Takeshi
Published: July 2006

cis-1,6a-Epoxy-3a-methyloctahydropentalen-2-one readily undergoes fragmentation to give stereoselectively methyl (E)-3-methyl-7-oxo-2-octenoate in 75% yield, on treatment with a catalytic amount of sodium carbonate in methanol. A pericyclic mechanism is suggested for the new ring opening reaction.