bluuebunny/crossref_metadata_2025 huggingface dataset:
UMSETZUNGEN DER UNGESÄTTIGTEN CARBONSÄUREN MIT HARNSTOFF UND THIOHARNSTOFF IN WÄSSRIGER PHOSPHORSÄURE
Authors: Takemoto Kiichi , Tahara Hideyuki , Inaki Yoshiaki , Ueda Nasuo
Published: July 2006

Die Reaktion von Maleinsäure mit Harnstoff sowie Thioharnstoff wurde in wäßtriger Phosphorsäure bzw. Pyrophosphorsäure unternommen. In jenem Fall wurde Fumarsäuremonoureid, und in diesem Fall wurde 5-Carboxymethyl-thiazolidin-2,4-dion gewonnen. Die Umsetzungen der ungesättigten Monocarbonsäuren mit Harnstoff und Thioharnstoff respektiv zu Dihydrouracil- und Thiazandionderivaten wurden auch versucht.
ENAMINES. VII(1). THE REACTION OF ENAMINES WITH SCHIFF BASES. A POSSIBLE CYCLOADDITION PATHWAY
Authors: Nomura Yujiro , Tomoda Shuji , Takeuchi Yoshito
Published: July 2006

The reaction of cyclohexanone enamines with benzylidenaniline in acetic acid gave unexpected N-phenyldecahydroacridine derivatives. The formation of these compounds can be rationalized assuming the [2+2]cycloaddition between enamines and the Schiff base to form an azetidine at the initial stage.
THE ELECTRONIC STRUCTURE OF THE CONJUGATE BASE OF 2-NAPHTHOIC ACID
Authors: Hoshi Tosbihiko , Yoshino Junko , Toma Hitoshi , Ota Kazuo
Published: July 2006

The polarized absorption spectrum of the conjugate base of 2-naphthoic acid was measured in a stretched PVA sheet. By comparing the polarized absorption spectrum with the results of the PPP calculations including a VESCF and variable β methods, we discussed the electronic structure of the conjugate base.
Ultraviolet and Charge-Transfer Spectra of Benzylsilanes
Authors: Sakurai Hideki , Kira Mitsuo , Ochiai Mitsuru
Published: July 2006

The frequencies of low-energy charge-transfer bands (CT-II) of 14 benzylsilane–tetracyanoethylene complexes were correlated with σI constants of substituents on silicon. The CT-II frequencies of benzylsilanes and other related compounds were also linearly related to their 1La absorption frequencies, a σ-π conjugation mechanism being discussed.
A New Ternary Compound in Rare Earth-Cobalt-Boron System
Authors: Niihara Koichi , Yajima Seishi
Published: July 2006

A new ternary boride RCo12B6 with a rhombohedral structure was synthesized by arc-melting in R-Co-B system, where R is a rare earth ion. From magnetic measurements, it was found that CeCo12B6 had a Curie temperature at 130°–140°K and exhibited a Curie–Weiss behavior in the paramagnetic region above 140°K.
NEW METHODS IN NUCLEAR QUADRUPOLE RESONANCE MEASUREMENT
Authors: Watanabe Noriyuki , Niki Eiji
Published: July 2006

New methods in nuclear quadrupole resonance measurement on the basis of digital procedure were developed. It was proved that the system was stable and the repeated accumulation of signal led to an improvement in sensitivity. These methods have an advantage of application for rapid scanning.
PHOTOCHEMICAL REACTIONS OF 1,2-DITHIOLE-3-THIONES AND RELATED COMPOUNDS WITH OLEFINS
Authors: Okazaki Renji , Ishii Fumio , Ozawa Kenji , Inamoto Naoki
Published: July 2006

Photochemical reactions of 5-phenyl- and 4-,5-diphenyl-3H-1,2-dithiole-3-thiones with olefins gave 2-thiobenzoylmethylene-1,3-dithiolanes. Ethylenetrithiocarbonate, 2H-1,3-dithiole-2-thione or 3H-1,2-dithiole-3-one did not react with cyclohexene under the same condition, but the first compound gave 7,8-tetramethylene-1,4-,6,9-tetrathia-spiro [4.4] nonane by irradiation with low-pressure mercury lamp.
THE NEW TRIPLET-STATE DIMERS FORMED BY MIXING BIS(N-ALKYLSALICYLALDIMINATO)COPPER(II) WITH CERTAIN BIS (β-DIKETONATO) COPPER(II) COMPLEXES IN TOLUENE
Authors: Yokoi Hiroshi
Published: July 2006

ESR experiments have revealed that bis(N-alkylsalicylaldiminato)copper(II) forms a new kind of triplet-state dimer in toluene with certain bis (β-diketonato) copper (II) complexes such as bis (hexafluoroacetylacetonato) copper(II), bis(1,1,1-trifluoroacetylacetonato) copper(II), etc.
CYCLIZATION OF POLYENES X. BIOGENETIC TYPE SYNTHESIS OF dl-TAONDIOL
Authors: Kumanireng Antonius S , Kato Tadahiro , Kitahara Yoshio
Published: July 2006

Based on biogenetical consideration taondiol (III) was synthesized upon treatments of epoxide (II) with picric acid, followed by hydrochloric acid. From the cyclized mixture, III was isolated in 2% yield.
MICRO-CALORIMETRIC DETERMINATION OF THE DISTRIBUTION OF ACID STRENGTH ON SILICA-ALUMINA CATALYST
Authors: Yoshizumi Haruo , Shimada Yoshifusa , Shirasaki Takayasu
Published: July 2006

The distribution of the acid strength on silica-alumina catalyst was expressed quantitatively on a scale of the differential heat of adsorption of n-butylamine which was determined by calorimetric method. The method will be expected as the fundamental method for determining the distribution of acid strength on solid acid catalyst.
THE X-RAY STUDY ON THE LOW- AND ROOM-TEMPERATURE FORMS OF HEXACHLOROFULVENE
Authors: Mano Koichi , Takusagawa Fusao , Hinamoto Masayuki , Kushi Yoshihiko
Published: July 2006

The X-ray analysis of hexachlorofulvene was undertaken at −130 °C and 20°C. The structure of the low-temperature form is in an ordered state and that of the room-temperature form is of a disorder-type. A disorder-model, in terms of the statistical mixture of four molecular orientations, was tentatively proposed.
DEPENDENCE OF RAMAN INTENSITIES OF PYRROLE, FURAN AND THIOPHENE UPON EXCITATION WAVELENGTH
Authors: Takamizawa Shoichi , Ito Mitsuo
Published: July 2006

The intensities of some totally symmetric Raman lines of pyrrole, furan and thiophene have been measured with 5145 A and 3371 A excitations. The Raman lines due to the stretching vibrations of two equivalent C–C bonds of the ring having greater double bond characters showed greater wavelength dependence of the intensities. The intermediate states mainly responsible to these Raman lines are low lying π, π* electronic excited states. The results support the theoretical prediction about connection between the vibrational mode of the Raman line and the molecular geometry in the electronic excited state.
EFFECT OF BORON TRIFLUORIDE ETHERATE ON THE PHOTOREARRANGEMENT OF N-BENZYLANILINES
Authors: Furukawa Junji , Omura Kanji
Published: July 2006

Irradiation of N-benzylanilines complexed with boron trifluoride (BF3) results in the preferential formation of o-benzylanilines. With optically active N-α-phenethylaniline, increased retention of optical activity in the ortho migrated product was observed as compared to that found in the absence of boron trifluoride etherate (BF3–Et2O).
STEROID BIOSYNTHESIS. THE ABSOLUTE CONFIGURATION OF THE ENZYMATICALLY ACTIVE ENANTIOMER OF 2,3-OXIDOSQUALENE PARTICIPATING IN ITS CYCLIZATION TO LANOSTEROL
Authors: Shishibori Tsuyoshi , Fukui Takashi , Suga Takayuki
Published: July 2006

The absolute configuration of the enzymatically active enantiomer of 2,3-oxidosqualene participating in its enzymatic cyclization to lanosterol has been first established experimentally to be 3S on the basis of circular dichroism measurements of a Eu(DPM)3 complex of (+)-2,3-dihydroxysqualene derived from the recovered oxidosqualene unchanged.
A CONVENIENT SYNTHESIS OF α-BROMOKETONES FROM VINYLOXYBORANES OBTAINED BY THE REACTION OF ORGANOBORANES WITH α, β-UNSATURATED KETONES
Authors: Miyaura Norio , Harada Masahiro , Itoh Mitsuomi , Suzuki Akira
Published: July 2006

Free-radical addition reaction of organoboranes to α, β-unsaturated ketones forms corresponding vinyloxyboranes (3) as the intermediate. Methanolysis of the dibromoderivatives which should be obtained by bromination of the initially formed vinyloxyboranes provides a convenient one-step synthetic procedure of α-bromoketones from organoboranes in good yields.
FRACTIONAL CRYSTALLIZATION OF A DIASTEREOMERIC DIPEPTIDE
Authors: Katakai Ryoichi , Hoshino Kin-ichiro , Oya Masanao , Toda Fujio , Uno Keikichi , Iwakura Yoshio
Published: July 2006

A successful fractional crystallization has been achieved on a diastereo-meric dipeptide, Dl-valyl-l-histidine to the d-l and l-l isomers. Resolution to the isomers with full optical activity is almost quantitative. Characterization of the dipeptide system by thin layer chromatography is also reported.
THE SECONDARY STRUCTURE AND MOLECULAR CHAIN ORIENTATION OF POLY-γ-METHYL-d-GLUTAMATE CAST FROM SOLUTION IN DICHLOROACETIC ACID
Authors: Kajiyama Tisato , Tanaka Masatoshi , Kuroishi Masayuki , Takayanagi Motowo
Published: July 2006

The β-form, which is completely free from other secondary structures, has been newly observed in the case of the solid poly-γ-methyl-d-glutamate film cast from solution in dichloroacetic acid. The a-and c-axes lie on the plane parallel to the film surface and the molecules are packed parallel with a helical twist relative to one another about the b-axis which is perpendicular to the film surface. When the solid film is stretched, the c-axis orients along the drawing direction by rotating about the b-axis, showing double orientation.
MOLECULAR DESIGN BY CYCLOADDITION REACTIONS. XI. CYCLOADDITION OF TROPONE AND DIPHENYLFULVENE
Authors: Sasaki Tadashi , Kanematsu Ken , Kataoka Takahiro
Published: July 2006

Cycloaddition reaction of tropone and 6,6-diphenylfulvene gave only 1:1 adduct in 60% yield. The structure of the adduct was established by spectral data and by chemical conversions. Mechanism for the formation of the [4+2]adduct is discussed.
VITAMIN-SENSITIVE ELECTRODES WITH A LIQUID MEMBRANE
Authors: Ishibashi Nobuhiko , Kina Kenyu , Maekawa Nobuko
Published: July 2006

Ion-selective electrode membranes responsive to vitamin B1 and vitamin B6 were prepared by using ion-association extraction systems. The liquid membrane electrodes exhibit appropriate Nernstian responses to vitamin B1 and vitamin B6 ions down to 105− M. High selectivities for vitamin B1 and vitamin B6 over Na+, NH4+, and K+ were observed.
THE MOLECULAR STRUCTURE AND THE ABSOLUTE CONFIGURATION OF 8,5′-ANHYDRO-7-BROMO-8-HYDROXY-2′,3′-O-ISOPROPYLIDENETUBERCIDIN
Authors: Asahi Ken-ichi , Anzai Kentaro , Suzuki Saburo , Iwasaki Hitoshi
Published: July 2006

The molecular structure of the title compound has been determined by X-ray diffraction methods. The conformation in ribose ring moiety differs from those in adenosine and tubercidin. Bridging oxygen atom is in the side of 2′ - and 3′-hydrogen atoms, and not in the side of sugar lactol oxygen atom.
THE EFFECT OF WEAK MOLECULAR INTERACTIONS ON SELECTIVE FORMATION OF UNSYMMETRICAL BISSULFIDES
Authors: Endo Tadashi , Sato Toshio , Sato Shigeru , Mukaiyama Teruaki
Published: July 2006

As part of a continuing study on synthetic control, some investigations are made on the effect of two factors, the number of CH2 groups (m and n) and changes in weak molecular interactions between a pair of model compounds (1 and 2), on the selective formation of an unsymmetrical bissulfide (4).
SMALL RING COMPOUNDS. IV. ANODIC OXIDATION OF CARBETHOXYCYCLOPROPANECARBOXYLIC ACIDS
Authors: Kimura Koji , Horie Shinji , Minato Ichiro , Odaira Yoshinobu
Published: July 2006

The substituent effect on the stability of a cyclopropyl radical generated by anodic oxidation of carbethoxycyclopropanecarboxylic acids is discussed, and then some synthetic applications of the cyclopropyl radical are demonstrated.
THE AMIDE-CLAISEN REARRANGEMENT. III. THE THERMAL REARRANGEMENT OF N-ALLYL-N-TOSYLANILINE
Authors: Inada Seisaku , Ikado Syuhei , Okazaki Mitsuo
Published: July 2006

The use of a small amount of triphenylphosphine in the thermal rearrangement of N-allyl-N-tosylaniline to 2-allyl-N-tosylaniline in N,N-dibutylaniline depressed, to a great extent, the decomposition of the reaction mixture. The sum of the yields of rearrangement products, which were 2-allyl- and 2-(trans-1-propenyl)-N-tosylaniline, and 2-methyl-1-tosylindoline, reached to 85%.
ESR STUDIES OF γ-IRRADIATED SOLID CYCLOPENTANONE
Authors: Katayama Meiseki , Katayama Akiko , Itoh Hiroyuki , Shimada Ryoichi , Sumiyoshi Takashi
Published: July 2006

The γ-irradiated 3,3,4,4-cyclopentanone-d4 was studied at low temperatures by means of ESR. The analysis of spectra and INDO calculations have indicated the presence of the anion radical.
DEAQUATION-ANATION REACTION OF AQUOPENTAAMMINERUTHENIUM(III) COMPLEXES
Authors: Ohyoshi Akira , Hiraki Shunichi , Odate Tomio , Kohata Susumu
Published: July 2006

The deaquation-anation reaction of [Ru(H2O)(NH3)5]X3 type complexes in solid state, as shown by the equation, [Ru(H2O)(NH5)3]X5 (s) → [RuX(NH3)5]X2 (s) + H2O (g), where X=NO3 and Br was investigated by means of the differential thermal analysis (DTA) and of the thermogravimetry (TG). The activation energies in the deaquation-anation processes of the nitrate and bromide were calculated as 17.5 and 23.0 kcal/mol by the isothermal rate study, and as 19.0 and 26.8 kcal/mol by the Freeman–Carroll analysis.
CHEMICAL REACTIONS OF ELECTRON DONOR-ACCEPTOR SYSTEMS: THERMAL [2+2] CYCLOADDITION REACTION OF VINYLFERROCENE WITH TETRACYANOETHYLENE
Authors: Shirota Yasuhiko , Yoshida Kazuo , Nogami Takashi , Mikawa Hiroshi
Published: July 2006

The thermal [2+2] cycloaddition reaction of vinylferrocene with tetracyanoethylene was found to occur under very mild reaction conditions in a non-polar solvent or even in solid states. Stabilization of the α-ferrocenyl carbonium ion in the zwitterionic intermediate or the transition state of that character is suggested to contribute to the facilitation of the reaction.
POLYMORPHOUS FORMS OF Sb2O3 FORMED BY THERMAL DECOMPOSITION OF Sb8O11Cl2
Authors: Matsuzaki Ryoko , Sofue Atsuko , Saeki Yuzo
Published: July 2006

The modification of Sb2O3 formed by the thermal decomposition of Sb8O11Cl2 varied with the method of preparing Sb8O11Cl2. Cubic Sb2O3 was obtained by the thermal decomposition of Sb8O11Cl2, which was prepared by decomposing Sb4O5Cl2, below 560°C.
SYNTHESIS AND SOME REACTIONS OF DITHIOBIS(CARBONYL CHLORIDE)
Authors: Kobayashi Norio , Osawa Akiko , Fujisawa Tamotsu
Published: July 2006

Dithiobis(carbonyl chloride) (I) was synthesized for the first time by the hydrolysis of bis(trichloromethyl) disulfide in concentrated sulfuric acid. Treatment of I with amines and phenels gave bis(carhamoyl) disulfides (III) and bis(oxycarbonyl) disulfides (IV), respectively.
THE MOLECULAR STRUCTURE OF CYCLOCHLOROTINE, A TOXIC CHLORINE-CONTAINING CYCLIC PENTAPEPTIDE
Authors: Yoshioka Hiroshi , Nakatsu Kazumi , Sato Motomu , Tatsuno Takashi
Published: July 2006

The molecular structure of the title oligopeptide has been determined by X-ray diffraction methods. The dihydrate crystals contain two independent molecules in the unit cell, and they have a quite similar conformation. The configuration of the two chlorine atoms around the Cβ–Cγ bond of the pyrrolidine ring is nearly gauche. Each molecule contains a β-loop of α-U-folding type.
CHEMICALLY INDUCED DYNAMIC NUCLEAR POLARIZATION IN THE CYCLOADDITION REACTION OF DISPIRO[2.2.2.2]DECA-4,9-DIENE WITH DIMETHYL TRANS,TRANS-MUCONATE
Authors: Tsuji Takashi , Nishida Shinya
Published: July 2006

The cycloadducts of dispiro[2.2.2.2]deca-4,9-diene I to dimethyl trans,trans-muconate II formed by way of the singlet diradical Intermediate exhibited CIDNP signals In spite of the absence of diffusive separation of the correlated radicals.
STRUCTURE AND ABSOLUTE CONFIGURATION OF (+)546-CIS(O)-(SARCOSINATE-N-MONOPROPIONATO)TRIAMMINECOBALT(III) ION
Authors: Okamoto Ken-ichi , Tsukihara Tomitake , Hidaka Jinsai , Shimura Yoichi
Published: July 2006

The absolute configuration of (+)546-cis(O)-( sarcosinate-N-monopropionato)triamminecobalt(III) ion was determined by X-ray diffraction study of its (+)546-(ethylenediaminetetraacetato)cobaltate(III) salt monohydrate. The asymmetric nitrogen atom of the tridentate sarcosinate-N-monopropionate ligand coordinated takes an R configuration. The (+)546-ethylenediaminetetraacetato)-cobaltate(III) ion has Δ configuration.
OXIDATION OF OLEFINS BY MANGANESE(III) ACETATE IN A PROPIONIC ACID SOLVENT. FORMATION OF PROPIONIC ACID DERIVATIVES
Authors: Okano Masayoshi
Published: July 2006

Oxidation of olefins by manganese(III) acetate was carried out using propionic acid as a solvent. The oxidation products obtained were propionic acid derivatives such as 2-methyl-4-propanoyloxyalkanoic acids, γ-lactones, alkanoic or alkenoic acids and propanoyloxyalkenes. Of these products, 2-methyl-4-propanoyloxyalkanoic acids underwent thermal cracking with ease to decompose into corresponding γ-lactones and propionic acid.
STUDIES OF POLYAZAPENTALENES. III. ELECTROPHILIC REACTIONS OF 8-SUBSTITUTED DIBENZO[b,e]-1,3a,6a-TRIAZAPENTALENE
Authors: Tsuge Otohiko , Samura Hideo
Published: July 2006

It has been found that the substitution occurs at 7-position of 8-substituted dibenzo-1,3a,6a-triazapentalene in the electrophilic reactions. This is compatible with the results of HMO and SCF-MO calculations.
THE DISTRIBUTION OF SULFER COMPOUND ON PALLADIUM BLACK AND ITS CATALYTIC POISONING EFFECT
Authors: Kitayama Yoshie , Hayakawa Masao
Published: July 2006

The difference of the selectivity between poisoned by ethylsulfide and non-poisoned Pd-black was observed in the catalytic hydrogenation of isoprene. To obtain the information of the poisoning state, electron microprobe X-ray analysis method was applied. According to the S-Kα radiation profile, ethylsulfide was distributed uniformly on the surface.
REACTIVITIES OF ARYL RADICALS IN HYDROGEN ABSTRACTION AND ADDITION
Authors: Takayama Kiyoshige , Kosugi Masanori , Migita Toshihiko
Published: July 2006

Relative reactivities of aryl radicals in hydrogen abstraction from negatively substituted aliphatic hydrocarbons and addition reaction to the double bonds of allyl compounds were estimated.
ELECTRODEPOSITION OF ALUMINUM FROM THE SOLUTION SYSTEMS OF ANILINE AND ITS SEVERAL DERIVATIVES
Authors: Hisano Takeo , Terazawa Toshio , Matsui Hiroshi
Published: July 2006

Aniline and its several derivatives, belonging to primary, secondary, or tertiary amines, are shown to be the effective solvents of aluminum bromide for the electrodeposition of metallic aluminum. The secondary and tertiary amine systems showed an intricate conductometric behavior in the dilute region of aluminum bromide. The correspondence of behavior between electrodeposition and conductivity was observed.
A MACROCYCLIC ENZYME-MODEL SYSTEM, AN EVIDENCE FOR INCORPORATION OF A SUBSTRATE INTO A SIMPLE CYCLIC CAVITY
Authors: Murakami Yukito , Sunamoto Junzo , Kano Koji
Published: July 2006

The release of p-nitrophenol from p-nitrophenyl hexanoate (PNPH), decanoate (PNPD), and laurate (PNPL) in the presence of 10-hydroxy-11-hydroxyimino[20]paracyclophane (Oxime-I) or 2-hydroxycyclodecanone oxime (Oxime-II) has been investigated in alkaline aqueous acetone at 19.6°C and pH 12.1. For the decomposition of PNPL, the specificity constant (kr), defined as the ratio of the apparent first-order rate constant for the reaction of Oxime-I to that for the reaction of Oxime-II, sharply increased below 26.7 % of acetone-content, while the rate constant for the simple alkaline hydrolysis without added catalyst species decreased with the decrease of acetone concentration. The copper(II) ion largely inhibited the reaction of PNPL with Oxime-I to reduce the rate below the catalyst-absence level. These results manifest the incorporation of the substrate into the cyclic cavity of the catalyst. The presence of substrate specificity was also indicated for the reaction of Oxime-I with p-nitrophenyl carboxylates.
PYROLYSIS OF AROMATIC THIOLSULFONATES IN THE PRESENCE OF METALLIC COPPER
Authors: Fujisawa Tamotsu , Ohta Hiromichi , Sugimoto Kikuo
Published: July 2006

Aryl arenethiolsulfonates were pyrolyzed in the presence of metallic copper to give the corresponding diaryl sulfides. A complex between thiolsulfonates and the copper was suggested as an intermediate, on the basis of ir spectra.
STUDIES ON THE SWELLING OF Li-TAENIOLITE WITH WATER
Authors: Kitajima Kunio , Daimon Nobutoshi
Published: July 2006

Synthetic Li-taeniolite LiMg2Li(Si4O10)F2 reacts with water, and nearly free swelling occurs. Its X-ray diffraction spectra show that the interlayer spacing d (001) discontinuously expands with the increase of water content, and eight crystalline swelling steps are observed.
CYCLOADDITION REACTION OF HEXAFLUOROTHIOACETONE DIMER IN THE PRESENCE OF FLUORIDE ION
Authors: Kitazume Tomoya , Ishikawa Nobuo
Published: July 2006

2,2,4,4-Tetrakis(trifluoromethyl)-1,3-dithietane [1] in KF/DMF system reacted with dienes such as anthracene and styrene , and with monoenes such as cyclohexene and dimethyl maleate, to give corresponding cycloadducts of these alkenes with hexafluorothioacetone [2].
THE DETECTION AND IDENTIFICATION OF RADICALS PRODUCED IN THE REACTION OF N-CHLOROSUCCINIMIDE AND p-TOLUENESULFONIC ACID BY SPIN TRAPPING TECHNIQUE
Authors: Ko Munan , Sato Tsuneyuki , Otsu Takayuki
Published: July 2006

To detect and identify radical intermediates in the reaction of N-chlorosuccinimide (NCS) with p-toluenesulfonic acid (PTS), the spin trapping technique has been applied. From the reactions in the presence of some nitrones as spin trapping agent, the ESR spectrum of a nitroxide radical formed by addition of a N-succinimidyl radical to nitrone was observed.
EXTRINSIC COTTON EFFECTS ASSOCIATED WITH THE J- AND γ-BAND OF TRIPHENYLMETHANE DYES BOUND TO POLY-α,l-GLUTAMIC ACID
Authors: Yamaoka Kiwamu
Published: July 2006

Spectroscopically “metachromatic” crystal violet shows a characteristic γ-band and, by comparison, “normal” malachite green gives rise to a sharp J-band, when each dye is bound to poly-α,l-glutamic acid in helical conformation. These absorption bands are associated with induced Cotton effects of very high magnitude hitherto not observed for acridine dyes.
STUDY OF CHEMILUMINESCENCE BY MEANS OF CROSSED BEAMS: NITRIC OXIDE–HYDROGEN ATOM SYSTEM
Authors: Ibaraki Takamasa , Kusunoki Isao , Kodera Kumasaburo
Published: July 2006

NO-H chemiluminescence was studied by crossed molecular beams. Anomalously bright light emissions have been observed with low temperature NO beams. It is considered that the chemiluminescence is caused by the 1A″–1A′ transition of HNO formed by the two-body collisions between NO dimers and H atoms. The apparent activation energy and the radiation cross section are estimated to be about −2.8 kcal/mole, and about 2×10−18cm2 for 6000–8300 Å, respectively.
PRESSURE-INDUCED REVERSIBLE PHOTO-REACTION OF PYRENE IN ALCOHOL SOLUTIONS
Authors: Torihashi Yoshikazu , Itaya Akira , mataga Noboru
Published: July 2006

Irradiation of alcohol solutions of pyrene under high pressure led to the formation of photoproduct which shows absorption and fluorescence bands similar to those of 3-hydroxypyrene. The photoproduct disappeared and absorption bands of pyrene recovered completely when the pressure was removed.
DEPENDENCY OF “COMPRESSIBILITY OF MIXING UNIT” ON SHORT-RANGE INTERACTION IN VINYL ACETATE–METHYL ACRYLATE COPOLYMER SOLUTIONS
Authors: Ikeda Hiroaki , Fujita Masao , Shimura Tetsu , Masuda Yuzo
Published: July 2006

The dilute solution properties of vinyl acetate–methyl acrylate random copolymers are investigated by the viscometric two-parameter theories in the statistical thermodynamics of homopolymer solution at zero frequency and by the measurement of adiabatic compressibility at 1 MHz. The short-range interaction parameter and “compressibility of mixing unit” for the copolymer are examined in relation with those of the parent homopolymers.

It is found that the “compressibility of mixing unit” of polymer depends on the short-range interaction independently of the long-range interaction.
ACID AUTO-CATALYSIS OBSERVED ON THE PHOTO-INDUCED ALCOHOLYSIS OF PHENYLOXIRANE
Authors: Hisaoka Motoyuki , Tokumaru Katsumi
Published: July 2006

Possibility of participation of acid catalysis on the photo-induced alcoholysis of phenyloxirane under nitrogen was explored to show that the reaction is surely initiated by the irradiation but suffers auto-catalysis by a trace amount of acidic matter formed during the irradiation even with the use of freshly purified alcohol.
THE TRANSFORMATION OF NITRILES INTO AMIDES BY THE USE OF TiCl4
Authors: Mukaiyama Teruaki , Kamio Kunimasa , Kobayashi Susumu , Takei Hisashi
Published: July 2006

It was found that various carboxamides were prepared in good yields without accompanying the formation of acids by the hydrolysis of nitriles by using TiCl4 in acetic acid.
Studies on Preparations and Physical Properties of Multivalent Metal Condensed Phosphates VI. The Effect of Water Content on the Formation of Various Aluminum Phosphates
Authors: Tsuhako Mitsutomo , Hasegawa Kazuko , Matsuo Tsuneo , Motooka Itaru , Kobayashi Masamitsu
Published: July 2006

The effect of water content on the formation of various aluminum phosphates from Al, Al2O3 or Al(OH)3 and H3PO4 was studied. Al4(P4O12)3 is easily formed by the secondary heat treatment when the water content of the primary product is below 10 % or over 25 %, and two unknown substances H and K are formed when the water content is 10∼15 % and 15∼25 %, respectively.
X-RAY STRUCTURE DETERMINATION OF EREMOPHILENOLIDE
Authors: Kabuto Chizuko , Takada Naoko , Maeda Shuichi , Kitahara Yoshio
Published: July 2006

The structure of eremophilenolide is confirmed to be (1) by X-ray analysis. The cis-fused decalin system takes all chair “steroid-like conformation.”
REACTIONS OF ORGANOMETALLIC REAGENTS WITH SELENOXANTHYLIUM AND THIOXANTHYLIUM SALTS
Authors: Hori Mikio , Kataoka Tadashi , Shimizu Hiroshi , Hsü Chen-Fu
Published: July 2006

By the reaction of appropriate selenopyrylium salts with phenyllithium, novel aromatic heterocycles, so-called selenabenzenes, such as 10-phenyl-10-selenaänthracene (III-1) and 9,10-diphenyl-10-selenaänthracene (III-2), have been prepared. The mechanism of the reactions of phenyllithium and Grignard reagents with selenoxanthylium salts and with thioxanthylium salts was also proposed.
THE CHEMISTRY OF PHENALENIUM SYSTEM. XIII. SYNTHESIS AND PROPERTIES OF 4H-CYCLOPENTA[cd]PHENALEN-4-ONE
Authors: Murata Ichiro , Yamamoto Kagetoshi
Published: July 2006

The synthesis of the title compound 3 from benzo-4,5-indan-3-one 4 is described. Upfield chemical shifts of the protons attached to the phenalenone moiety of 3 relative to those of the dihydro derivative 9 are interpreted in terms of an induced paramagnetic ring current in the periphery of this molecule.
CYCLOADDITION REACTION OF METHYL COUMALATE WITH CYCLOHEPTATRIENE
Authors: Imagawa Takeshi , Sueda Noriyosi , Kawanisi Mituyosi
Published: July 2006

Thermal cycloaddition reaction of methyl coumalate (1a) with cycloheptatriene (2) afforded 6-methoxycarbonyl- and 2-methoxycarbonyltetracyclo [5.4.0.02,4.03,8]undeca-5,10-diene, (6a) and (7a). Similar reaction of methyl isodehydroacetate (1a) with 2 gave only 1,3-dimethyl-2-methoxycarbonyl derivative (7c).
ANOMALOUS BEHAVIORS IN SODIUM-CHLORANIL ION RADICAL SALT AROUND 110°C
Authors: Tsuda Motoyuki , Sakai Nobuko , Shirotani Ichimin , Murano Kentaro
Published: July 2006

The electronic spectrum and the electrical conductivity of Na+(CA)− abruptly change around 110°C. The X-ray studies show that the crystalline nature of the salt changes around this temperature. The results of the DSC measurement and the vibrational spectrum suggest that the above anomaly may be induced by release of water in the salt.
COPPER TETRACARBONYL CATION BY DIRECT CARBONYLATION OF CUPROUS ION
Authors: Matsushima Yoshihisa , Koyano Takashi , Kitamura Tetsuo , Wada Shozo
Published: July 2006

Carbon monoxide was absorbed by cuprous ion up to CO(absorbed)/Cu(I) ratio of 4 in BF3-water systems under atmospheric pressure. Infrared spectra of the solutions revealed an interaction between Cu+ and CO, indicating formation of Cu(CO)4+.
VINYL POLYMERIZATION. 302. POLYMERIZATION OF METHYL METHACRYLATE WITHOUT SHAKING WITH THE SYSTEM OF STARCH, WATER AND CARBON TETRACHLORIDE
Authors: Imoto Minoru , Ree Keiu , Ouchi Tatsuro
Published: July 2006

Polymerization of methyl methacrylate(MMA) initiated with aquous starch solution in the presence of carbon tetrachloride was carried out on standing. The rate of polymerization and the molecular weight of the polymer obtained were faster and higher than those under shaking. It was found that the polymerization initiated and proceeded in the water layer. The rate of polymerization (Rp) was concluded to be expressed by the equation: Rp = const. [starch]1.0.
ON THE INERTNESS OF SYN-TRICYCLO[4.2.0.02,5]OCTA-3,7-DIENE UNDER PHOTOLYTIC CONDITIONS. AN APPARENT VIOLATION OF THE ORBITAL SYMMETRY RULE
Authors: Iwamura Hiizu , Morio Kazuhiko , Kihara Hiroshi
Published: July 2006

An MO explanation is given to the failure of the intramolecular photocycloaddition reaction of syn-tricyclo[4.2.0.02,5]octa-3,7-diene. Due to the presence of the high-lying σ-orbitals of the cyclobutane ring and to the unique topology of the molecule, the electronic excitation could not be related to the ethylenic chromophore and/or a possible degenerate isomerization might be induced by photoexcitation.
FURTHER INVESTIGATION OF THE DISTRIBUTION OF ATOMIC COBALT IN THE FLAME
Authors: Fujiwara Kitao , Haraguchi Hiroki , Fuwa Keiichiro
Published: July 2006

For measuring the exact distribution of metal atoms in the flame, HITACHI 207 atomic absorption spectrophotometer was modified to a single light path with a smaller diameter of the light beam. Using this improved spectrophotometer, the more detailed distribution of cobalt atoms in the air-acetylene flame was measured in terms of some cobalt(III) complexes.
THE PROTON MAGNETIC RESONANCE SPECTRUM OF ETHYLENIMINE
Authors: Nakanishi Hiroshi , Yamamoto Osamu
Published: July 2006

An NMR spectrum of completely dehydrated ethylenimine in liquid phase is found to show well resolved multiplets for the aziridine ring protons and the computer analysis is made to determine the NMR parameters. Temperature dependent NMR spectra show that the nitrogen inversion of ethylenimine does not occur at room temperature.
A CONVENIENT METHOD FOR THE PREPARATION OF VINYL SULFIDES FROM CARBONYL COMPOUNDS BY USING TiCl4
Authors: Mukaiyama Teruaki , Saigo Kazuhiko
Published: July 2006

Various ketones, such as deoxybenzoin, propiophenone, phenylacetone, benzylacetone, cyclohexanone and 2-methylcyclohexanone, and aldehyde such as 3-phenylpropionaldehyde were smoothly converted to the corresponding vinyl sulfides in good yields by the treatments with thiols in the presence of TiCl4.
ION-SELECTIVE ELECTRODES RESPONSIVE TO MALEIC AND PHTHALIC ACIDS
Authors: Ishibashi Nobuhiko , Jyo Akinori , Yonemitsu Morihisa
Published: July 2006

The electrode membranes responsive to maleic and phthalic acids were prepared by using the organic solvent solutions of the crystal violet salts of the corresponding organic anions. The responses of both the electrodes are linear down to 10−4 – 10−4.5 M, with an ideal Nernstian slope of 58 mV per activity decade at 20 °C.
GAS CHROMATOGRAPHIC BEHAVIOR OF PERHALOALKANES
Authors: Tominaga Takeshi , Iwata Ren , Makide Yoshihiro
Published: July 2006

The gaschromatographic behavior of perhaloalkanes containing one or two carbon atoms and different kinds of halogen atoms in a molecule was investigated. The logarithm of the specific retention volume was correlated well with the halogen composition, the boiling point, the estimated volume of molecule and the molar refractivity of these compounds.
CYCLIC VOLTAMMETRY AND ELECTRON PARAMAGNETIC RESONANCE SPECTRA OF P-IODONITROEENZENE ANION RADICAL IN METHYLISOBUTYLKETONE
Authors: Kitagawa Toyokichi
Published: July 2006

Electron paramagnetic resonance (EPR) spectra of p-iodonitrobenzene anion radical was obtained in methylisobutylketone (MIBK) using tetrabutylammonium perchlorate (TBAP) as a supporting electrolyte. The line broadening of EPR spectra of p-iodonitrobenzene anion radical is considered to be caused by the ion pair formation between supporting electrolyte cation and radical anion.
ABSOLUTE CONFIGURATIONS OF (+)-METHYL TODOMATUATE AND ITS NEW ANALOGUES, PSEUDOTSUGONAL AND AR-PSEUDOTSUGONAL, ISOLATED FROM DOUGLAS-FIR WOOD
Authors: Sakai Tsutomu , Hirose Yoshio
Published: July 2006

Two new sesquiterpene keto aldehydes, named pseudotsugonal and ar-pseudotsugonal, together with (+)-methyl todomatuate were isolated from the wood of Douglas fir (Pseudotsuga menziesii (Mirb.)Franco) grown in British Columbia. The absolute configurations of all these compounds have been established to possess the R,R configuration at the two asymmetric centers.
HYDROSILANE-RHODIUM(I) COMPLEX COMBINATIONS AS SILYLATING AGENTS OF ALCOHOLS
Authors: Ojima Iwao , Kogure Tetsuo , Nihonyanagi Mitsuru , Kono Hiromichi , Inaba Shinichi , Nagai Yoichiro
Published: July 2006

The dehydrogenative condensation of organosilicon hydrides with alcoholic substances catalyzed by rhodium (I) complex was found to furnish a convenient route for the preparation of silylated alcohols.
FORMATION OF INTERSTELLAR MOLECULES ON THE SURFACE OF GRAINS
Authors: Iguchi Tetsuo , Sakata Akira , Murakami Hitoshi , Nakagawa Naoya
Published: July 2006

Relative amounts of molecules formed by relaxation type reactions between radicals (atoms) and radicals (atoms) on the grain surfaces are calculated. The result can explain the formation mechanism of observed molecules. A prediction has been made on molecules such as methylamine which are expected to be detectable.
THE SYNTHESES OF BIS(ETHYLENEDIAMINE)-TETRAMETHYLENEDIAMINE AND -DODECAMETHYLENEDIAMINE COBALT(III) COMPLEXES
Authors: Ogino Hiroshi , Fujita Junnosuke
Published: July 2006

Dimethylsulfoxide(DMSO) was found to be useful solvent for synthesizing various novel complexes. The reactions between cis- or trans-[CoCl2(en)2]+ and tetramethylenediamine or dodecamethylenediamine in DMSO produce new complexes, [Co(en)2(tmd)]n3n+ (n = 1 and 2), [Co(en)2(tmdH)2]5+, [Co(en)2(don)]n3n+ (n = 1 or 2) and [Co(en)2(donH)(H2O)]4+, where en, tmd, don, tmdH+ and donH+ denote ethylenediamine, tetramethylenediamine, dodecamethylenediamine, mono-protonated tetramethylenediamine and mono-protonated dodecamethylenediamine, respectively.
EFFECT OF IRRADIATION TEMPERATURE ON THE DISTRIBUTION OF 32P-ACTIVITY IN NEUTRON IRRADIATED ADENOSINE TRIPHOSPHATE
Authors: Kitaoka Yoshinori , Kobayashi Mitsue , Okada Moritami
Published: July 2006

The radioactivity distribution in reactor-irradiated adenosine triphosphate changed with irradiation time (5∼60min). This was mainly due to differences in the irradiation temperature, which was estimated by melting points of carboxylic acids and amides.
THE SWELLING OF Ge-TAENIOLITE SERIES MICAS WITH WATER
Authors: Kitajima Kunio , Daimon Nobutoshi
Published: July 2006

Germanium substituted analogues of Na-taeniolite and Li-taeniolite, i.e., Na–Ge-taeniolite NaMg2Li(Ge4O10)F2 and Li–Ge-taeniolite Limg2Li (Ge4O10)F2 were found to be expanded by water. However, the hydration tendencies of these Ge-taeniolites were found to be somewhat weaker than those of the corresponding silicon substituted analogues.
ASYMMETRIC REDUCTION OF KETONES VIA HYDROSILYLATION CATALYZED BY A RHODIUM(I) COMPLEX WITH CHIRAL PHOSPHINE LIGANDS
Authors: Ojima Iwao , Kogure Tetsuo , Nagai Yoichiro
Published: July 2006

Asymmetric reduction of ketones has been achieved via catalytic hydrosilylation using rhodium(I) complex with an optically active phosphine ligand as a catalyst.
5-AMINO-1-β-d-RIBOFURANOSYL-4-IMIDAZOLECARBOXAMIDE BY ALKALINE DEGRADATION FROM INOSINE
Authors: Suzuki Yoshihisa
Published: July 2006

5-Amino-1-β-d-ribofuranosyl-4-imidazolecarboxamide has been obtained from inosine by means of degradation in aqueous alkali over 100°C.
THE EFFECT OF WATER ON THE PHOTO-REACTION OF TOLUENE WITH IRON(III) CHLORIDE
Authors: Inoue Hiroo , Izumi Megumu , Imoto Eiji
Published: July 2006

The photo-reaction of toluene with iron(III) chloride is found to be controlled by the presence of water to lead to either nuclear or side-chain attack.
STUDIES ON PREPARATIONS AND PHYSICAL PROPERTIES OF MULTIVALENT METAL CONDENSED PHOSPHATES. VII. THE EFFECT OF WATER CONTENT ON THE FORMATION OF THE TYPES A AND B OF Al4(P4O12)3
Authors: Tsuhako Mitsutomo , Hasegawa Kazuko , Matsuo Tsuneo , Motooka Itaru , Kobayashi Masamitsu
Published: July 2006

The effect of water content on the formation of the types A and B of Al4(P4O12)3 from Al, AL2O3 or Al(OH)3 and H3PO4 was studied. Upon heating at 500°C, a mixture of the types A and B of Al4(P4O12)3 is generally obtained. However, type A is the main product of the secondary heat treatment when the water content of the primary product is below 10 % or over 25 %, whereas type B is readily formed when the water content is 12∼18 %
REACTIONS OF METHINYLTRICOBALT ENNEACARBONYL WITH OLEPINS
Authors: Sakamoto Noritoshi , Kitamura Takanori , Joh Takashi
Published: July 2006

Alkyl or alkenyl substituted methinyltricobalt enneacarbonyls were formed in the reactions of methinyltricobalt enneacarbonyl with mono- or diolefins.
THE REACTION OF OLEFINS WITH PBr3 AND OXYGEN
Authors: Okamoto Yoshiki , Sakurai Hiroshi
Published: July 2006

2-Bromoalkylphosphonic dibromides were obtained in good yield by the reaction of olefins with PBr3 and oxygen.
CONJUGATIVE EFFECT OF PYRIDAZINONE RING ON THE COPOLYMERIZABILITIES OF 3(2-SUBSTITUTED)6-METHYLPYRIDAZINONES WITH STYRENE
Authors: Matsubara Yoshio , Noguchi Munenori , Yoshihara Masakuni , Maeshima Toshihisa
Published: July 2006

Radical copolymerizations of several pyridazinones (I–VI) with styrene (M1) have been carried out. It has been found that plots of log 1⁄r1, against both νc=o and νc=c in the pyridazinone ring gave straight lines, indicating that the reactivity of the double bond in the ring might be affected by the ring conjugation which involves the carbonyl group.
DISPROPORTIONATION OF PROPYLENE ON A SUPPORTED MOLYBDENA-ALUMINA CATALYST WITH FLOW SYSTEM IN THE LIQUID PHASE
Authors: Ogata Eisuke , Kamiya Yoshio
Published: July 2006

The disproportionation of propylene with flow system in the gas phase and in the liquid phase has been investigated using a molybdena catalyst supported on alumina. Results show that the catalytic activity decreases rapidly in the gas phase as the reaction proceeds but preserves for longer time in the liquid phase. This should be due to the effect that the heavier materials produced by the side reaction dissolve in the liquefied olefins and are carried away from the catalyst surface.
SELECTIVITY IN THE CATALYTIC FORMATION OF ACETALDEHYDE, ETHYLENE AND ETHYL ETHER FROM ETHYL ALCOHOL OVER POLYNAPHTHOQUINONE CONTAINING FeCl3
Authors: Iwasawa Yasuhiro , Ogasawara Sadao , Onishi Takaharu , Tamaru Kenzi
Published: July 2006

The rate as well as the selectivity of ethyl alcohol decomposition to acetaldehyde, ethylene and ethyl ether was markedly dependent on the FeCl3 content in the polynaphthoquinone catalyst and the formation of ethylene and ether was considered to take place on the FeCl3 coordinated to the quinone group of the catalyst.
PHOTOCHROMISM OF DIMETHYLAMMONIUM MOLYEDATE
Authors: Yamase Toshihiro , Ikawa Tsuneo , Kokado Hiroshi , Inoue Eiichi
Published: July 2006

A new photochromic compound was found. Dimethylammonium molybdate (DMAM) represented by the ideal formula {(CH3)2NH2}2O·3MoO3·H2O colored remarkably to the reddish brown on exposure to UV and returned to the original white by thermal fading. DMAM exhibited photochromic phenomena in the solid state and the correlation between coloration and UV-induced ESR signals was found.
EVIDENCE FOR NITROGEN-INVERSION ISOMERISM OF PROLINE
Authors: Sugiyama Hiroshi , Shiraishi Hiroyuki , Seto Shuichi
Published: July 2006

The proton NMR chemical shifts of l-Phe-l-Pro and d-Phe-l-Pro can be explained by the proline stereoisomerism due to the nitrogen inversion.
THE BIOSYNTHESIS OF PROTOANEMONIN IN RANUNCULUS GLABER MAKINO
Authors: Suga Takayuki , Hirata Toshifumi
Published: July 2006

Sodium [2-14C]malonate and d-[U-14C]glucose were incorporated into protoanemonin (I) in Ranunculus glaber Makino in 0.60 and 0.09% yield respectively at the highest value. Its labeling pattern suggests that the lactone I is biosynthesized by the condensation of glycerate and malonate in a terrestrial part of the plant.
PHOTO-CYCLOADDITION OF 1,4-NAPHTHOQUINONE WITH 2-NORBORNENE—A NOVEL TYPE OF PHOTO-CYCLOADDITION
Authors: Maruyama Kazuhiro , Otsuki Tetsuo , Naruta Yoshinori
Published: July 2006

Photo-cycloaddition compound composed of two molecules of 1,4-naphthoquinone and one molecule of 2-norbornene was obtained in the photochemical reaction of 1,4-naphthoquinone with 2-norbornene. Structure of the photo-cycloaddition compound was determined as (4). This type of photo-cycloaddition compound involving the formation of six membered carbon ring has never been reported.
PHOTOREACTION OF 2,5-DIPHENYL-1,4-DITHIIN
Authors: Kobayashi Keiji , Ohi Tadao
Published: July 2006

Irradiation of an ethereal solution of 2,5-diphenyl-1,4-dithiin afforded two types of dimer without formation of the products resulting from intramolecular photocyclization. The photodimers were shown to be a cis, syn-half-closed dimer and an anti-cage dimer.
THE VISCOELASTIC CRYSTALLINE ABSORPTION OF POLYGLUTAMIC ACID ESTERS
Authors: Kuroishi Masayuki , Kajiyama Tisato , Takayanagi Motowo
Published: July 2006

The viscoelastic crystalline absorption has been observed for the solid poly-γ-methyl-d-glutamate and poly-γ-benzyl-l-glutamate cast from various solvents. The temperature range of crystalline absorption (180 to 210°C) corresponds to the temperature range in which the lattice spacing deviates from linear expansion and also, the average size of crystallite increases extremely with increasing temperature.
EXCHANGE OF π-VINYL ALCOHOL OF PLATINUM(II) COMPLEX WITH ACETALDEHYDE
Authors: Francis James , Tsutsui Minoru
Published: July 2006

Exchange reaction of π-vinyl alcohol group on acetylacetonatochloroplatinum(II) with C14 labeled acetaldehyde was observed. If the exchange proceeds by attack of free vinyl alcohol, the sluggish reaction is attributable to the very small amount of vinyl alcohol in equilibrium with acetaldehyde.
FORMATION OF CYCLODIETHERS FROM 6-METHYL-5-HEPTEN-2-OL AND CITRONELLOL IN THE PRESENCE OF BORON TRIFLUORIDE ETHERATE
Authors: Nagai Kimiko , Nakayama Mitsuru , Hayashi Shûichi
Published: July 2006

On treatment with boron trifluoride etherate at room temperature, 6-methyl-5-hepten-2-ol and citronellol dimerized to give dioxamonocyclic compounds in a good yield.
THE AZULENE RADICAL ANION PRODUCED BY ONE-ELECTRON TRANSFER FROM TRIMETHYLSILYLSODIUM
Authors: Sakurai Hideki , Umino Hiroshi , Okada Akane
Published: July 2006

The esr spectrum of the radical anion of azulene prepared by the reaction with trimethylsilylsodium in hexamethylphosphoramide with all of the expected 108 lines is reported. The minimum interaction between the azulene radical anion and countercation as compared with any previous results was observed.
CIRCULAR DICHROISM SPECTRA OF COBALT(III) COMPLEXES CONTAINING AMINO ALCOHOL
Authors: Ogino Kazuko , Uchida Takateru , Nishide Toshikazu , Fujita Junnosuke , Saito Kazuo
Published: July 2006

The complex [Co(en)2(l-praH)]Br3, where praH denotes 2-amino-1-propanol, was prepared and separated into two diastereoisomers, ΔL and ΔL. Their circular dichroism(CD) spectra changed remarkably by the change of pH of the solution. These changes were attributed to the dissociation of the alcoholic proton: [Co(en)2(l-praH)]3+\ightleftharpoons [Co(en)2(l-pra)]2+ + H+. The deprotonated l-pra− chelate gave an exceptionally large vicinal contribution to the optical activity. The CD spectra of optically active [Co(en)2(etaH)]Br3(etaH = aminoethanol) and [Co(NH3)4(l-praH)]Br3 are also given.
ANODIC OXIDATION OF TRIALKYLBORANES. A NEW PROCEDURE OF ALKYL COUPLING REACTION OF ORGANOBORANES
Authors: Taguchi Toru , Itoh Mitsuomi , Suzuki Akira
Published: July 2006

Trialkylboranes are readily electrolyzed by using two platinum plates as electrodes in methanol containing potassium hydroxide to give alkyl group coupling products.
A NEW TYPE OF URUSHIBARA NICKEL CATALYST (U–Ni–N). ACTIVATION OF THE PRECIPITATED NICKEL (PRECURSOR OF URUSHIBARA NICKEL CATALYSTS) BY REFLUXING WITH ALCOHOLS
Authors: Kajitani Masatsugu , Okada Junko , Ueda Tetsuya , Sugimori Akira , Urushibara Yoshiyuki
Published: July 2006

A new method of activation of ppt-Ni by refluxing with alcohols is described. The ppt-Ni activated in this way (U–Ni–N) exhibits high catalytic activity corresponding to U–Ni–A. The catalyst performs selective reactions in the hycrogenation of 1-octene (low isomerization) and of cyclcolefins.
A NEW DERIVATIVE OF ANTIBIOTIC B-58941
Authors: Suzuki Takashi
Published: July 2006

Structure of new compound derived by reaction of diacetate of antibiotic B-58941 with sodium methoxide in methanol is assumed as 2′-O-acetyl-2,3-anhydro-13-hydroxy-12-methoxy-depoxy B-58941. It is also assumed that in antibiotic B-58941, d-mycaminose and 4-ulose sugar are bound to C-5-O of the aglycone (by β-linkage) and to C-4′-O of d-mycaminose (by α-linkage), respectively.
THE NICKEL-CATALYZED ISOMERIZATION OF METHYLENECYCLOPROPANE TO BUTADIENE
Authors: Takaya Hidemasa , Hayashi Nobuaki , Ishigami Tatsuzo , Noyori Ryoji
Published: July 2006

Methylenecyclopropane under the influence of nickel catalysts dimerizes to give 2-vinylmethylenecyclopentane. The intervention of butadiene intermediate has been determined on the basis of the isotope incorporation into the product and the asymmetric transformation.
THERMAL POLYMERIZATIONS OF METAL MALEATES IN SOLID STATE
Authors: Konishi Yoshiaki , Saijo Hiroshi
Published: July 2006

When the thermal stabilities of a number of metal maleates in solid state were studied by means of TGA and DTA, they exhibited a remarkable exothermic process at a temperature characteristic of each metal salt. It was found that this process corresponds to the polymerization reaction of the metal maleate. In the cases of Na and Pb(II) salts, the polymer in the form of methyl esters was a brown amorphous solid ( DP \doteqdot 3 ).
CONDUCTIVITY EFFECTS ON CUT-OFF FREQUENCY OF ELECTROHYDRODYNAMIC INSTABILITY IN NEMATIC LIQUIDS
Authors: Matsumoto Shoichi , Kawamoto Masahiro , Tsukada Tomomichi
Published: July 2006

Conductivity effects on the cut-off frequency fc of the electrohydrodynamic instability were studied, using nematic liquids doped with an organic electrolyte in different concentrations. The values of fc were obtained from the optical observation. It was found that fc is proportional to the conductivity (ρ−1) of the nematic liquids, just as fc = Kρ−1; K = 1.25×1012Ωcm/sec. This relation supports that the space charge is responsible for the electrohydrodynamic instability.
STEREOSELECTIVITY PATTERNS OF THE PLATINUM METALS IN THE CATALYTIC HYDROGENATION OF SOME CYCLOOLEFINIC COMPOUNDS
Authors: Nishimura Shigeo , Sakamoto Hiroshi , Ozawa Tsuyoshi
Published: July 2006

The stereoselectivity of the platinum metals in the catalytic hydrogenation of 1,2- and 1,6-dimethylcyclohexene, 1-methyl-2-methylenecyclohexane and 6-ethoxy-1-methylcyclohexene has been studied. The formation of trans isomer increased in the order Ir < Os < Pt,Ru,Rh << Pd. This order in stereoselectivity has been related to the olefin isomerization activities of the metals.
THE N4-BENZOYLATION OF DEOXYCYTIDYLIC AND CYTIDYLIC ACIDS BY MEANS OF 2-CHLOROMETHYL-4-NITROPHENYL BENZOATE
Authors: Hata Tsujiaki , Kurihara Takashi
Published: July 2006

Useful intermediates in the syntheses of polynucleotides, such as 3′-O-acetyl N4 -benzoyldeoxycytidine 5′-phosphate, 2′,3′-O-diacetyl N4-benzoylcytidine 5′-phosphate, N4-benzoyldeoxycytidine and N4-benzoylcytidine, were prepared conveniently in high yields by the use of a new mild benzoylating reagent, 2-chloromethyl-4-nitrophenyl benzoate.
SYNTHESIS OF 2-DIALKYLAMINO-1,3-DITHIETAN-2-YLIUM SALT. ACTION OF STRONG ACIDS ON BENZYLIDENEBIS(N,N-DIALKYLDITHIOCARBAMATES)
Authors: Ueno Yoshio , Okawara Makoto
Published: July 2006

The protonation of benzylidenebis(N,N-dialkyldithiocarbamates) with 70% perchloric acid or conc. sulfuric acid produced new four-membered heteronium salts; 2-dialkylamino-4-aryl-1,3-dithietan-2-ylium salts in high yields. A possible mechanism for the formation and the structural elucidation of 1,3-dithietan-2-ylium salts were described.
CO-PYROLYSIS OF 1,1,2-TRICHLOROETHANE AND METHANOL ON ACTIVATED ALUMINA
Authors: Shinoda Kiyonori
Published: July 2006

The copyrolysis of 1,1,2-trichloroethane (TCE) and methanol on activated alumina was carried out at 250∼400°C. 1,1-dichloroethylene (VDC) to 1,2-dichloroethylene (DE) ratio amounted to several times of the ordinary pyrolysis. This reaction proceeded as follows.

CH2ClCHCl2 + CH3OH → CH2:CCl2 + CH3Cl + H2O