bluuebunny/crossref_metadata_2025 huggingface dataset:
THE PHOTOCYCLOADDITION OF 9-CYANOPHENANTHRENE AND 9-CYANOANTHRACENE WITH VINYL ETHERS AND FURAN
Authors: Mizuno Kazuhiko , Pac Chyongjin , Sakurai Hiroshi
Published: July 2006

The photocycloaddition of 9-cyanophenanthrene with a vinyl ether affords a (2 + 2) cycloadduct, 1-cyano-8-alkoxy-2,3;4,5-dibenzobicyclo[4.2.0] octa-2,4-diene (I), but no 1:1-adduct can be obtained with furan, whereas irradiation of 9-cyanoanthracene in the presence of furan gives a (4 + 4) cycloadduct, 1-cyano-7,8;9,10-dibenzo-11-oxatricyclo[4.2.2.12,5] undeca-3,7,9-triene (III), but no 1:1-adduct is given by the irradiation in the presence of vinyl ethers.
ELECTRO-OPTICAL PROPERTIES OF HIGH PURITY NEMATIC LIQUID CRYSTAL UNDER VACUUM CONDITION
Authors: Nakauchi Jun , Yokoyama Masaaki , Kato Keishi , Okamoto Ken-ichi , Mikawa Hiroshi , Kusabayashi Shigekazu
Published: July 2006

The effects of impurities having influence on electro-optical properties of nematic liquid crystal, p-methoxybenzylidene-p′-n-butylaniline, have been investigated under d.c. excitation. For the sample prepared in vacuum, no dynamic scattering was observed but a new domain-like pattern was observed following Williams domain and once the vacuum was broken, the domain pattern changed into a wave-like pattern and dynamic scattering occurred as in the ordinary case.
SYNTHESIS OF (±) -12-HYDROXY-3-OXOTOTARA-1,8,11,13-TETRAENE A PROPOSED STRUCTURE FOR SHONANOL
Authors: Matsumoto Takashi , Tanaka Isao , Ohno Toru , Fukui Kenji
Published: July 2006

12-Hydroxy-3-oxototara-1 ,8,11,13-tetraene (Ia) and its cis-isomer (Ib) were synthesized from 3-isopropylanisole (II) via 5-isopropyl-7-methoxy-1-methyl-2-tetralone (XV) by the route of C→B→A ring construction. The spectral data of the synthetic Ia and Ib were different from those of natural shonanol.
DETERMINATION OF CYANO NITROGEN IN INORGANIC CYANO COMPOUNDS BY KJELDAHL METHOD
Authors: Matsumoto Yoshio , Kawashima Takeshi , Shirai Michiko
Published: July 2006

By retention of a high level of sulfuric acid concentration at the beginning of digestion process and use of a subsidiary decomposition-reagent, determination of inorganic cyano-nitrogen by Kjeldahl method was made possible.
ADDITION REACTION OF THIOL TO OLEFIN BY THE USE OF TiCl4
Authors: Mukaiyama Teruaki , Izawa Toshio , Saigo Kazuhiko , Takei Hisashi
Published: July 2006

It was established that, in the presence of TiCl4, α,β-unsaturated carbonyl compounds react with ethanethiol at room temperature to afford the addition products, 3-ethylthiocarbonyl compounds, in good yields.
SYNTHETIC STUDIES OF CARBOHYDRATE DERIVATIVES WITH PHOTOCHEMICAL REACTION. VII. PHOTOCHEMICAL ADDITION OF ETHANETHIOL AND 1-PROPANETHIOL TO ENOSES
Authors: Araki Younosuke , Matsuura Kazuo , Ishido Yoshiharu , Kushida Katsuhiko
Published: July 2006

Acetone-sensitized photochemical addition of ethanethiol and 1-propanethiol to 2,3,4,6-tetra-O-acetyl-2-hydroxy-d-glucal gave the corresponding α-thioglucopyranosides in 77.1% and 79.3% yields, respectively. Similar addition reactions of thiols to methyl 4,6-di-O-acetyl-2,3-dideoxy-α-d-erythro-hex-2-enopyranoside and 3,4, 6-tri-O-acetyl-d-glucal were also described.
A RELATIONSHIP BETWEEN THE COTTON EFFECT AND THE CONFORMATION OF A SEVEN-MEMBERED LACTAM RING
Authors: Ogura Haruo , Takayanagi Hiroaki , Furuhata Kimio
Published: July 2006

A rule about the n-π* Cotton effect of seven-membered lactam ring was investigated. From this rule, the seven-membered lactam was classified into two types A and B. Type A should have the negative and type B should have the positive Cotton effect.
ENZYMATIC SYNTHESIS OF BISHOMOFARNESYL PYROPHOSPHATE WITH THE INSECT JUVENILE HORMONE SKELETON
Authors: Koyama Tanetoshi , Ogura Kyozo , Seto Shuichi
Published: July 2006

trans,trans,cis-3,11-Dimethyl-7-ethyltrideca-2,6,10-trien-1-ol and its pyrophosphate whose carbon skeletons were the same as that of insect juvenile hormone were synthesized from cis-3-methylpent-2-enyl pyrophosphate, 3-ethylbut-3-enyl pyrophosphate and isopentenyl pyrophosphate by the action of farnesyl pyrophosphate synthetase.
IONIC EQUILIBRIA IN MIXED SOLVENTS. IX. THE AUTOPROTOLYSIS CONSTANTS OF MIXTURES OF WATER AND AN AMPHIPROTIC SOLVENT
Authors: Ohtaki Hitoshi
Published: July 2006

A thermodynamic consideration is made for the autoprotolysis constant of a mixture of water and an amphiprotic solvent on the basis of equilibria of hydronium-lyonium and hydroxyl-lyate ions. The autoprotolysis constants of various water-methanol solutions are calculated and compared with those in literature. The calculated values of autoprotolysis constants of water-ethanol and water-n-propanol solutions are presented.
THE REACTION OF DISODIUM TETRACARBONYLFERRATE(-II) WITH 1,3-DIBROMOPROPANE. THE FORMATION OF A NOVEL 2-FERRACYCLOPENTANONE COMPLEX
Authors: Watanabe Yoshihisa , Mitsudo Take-aki , Yamashita Masakazu , Tanaka Masato , Takegami Yoshinobu
Published: July 2006

Disodium tetracarbonylferrate reacts with 1,3-dibromopropane in the presence of phosphine to give a 2-ferracyclopentanone complex,

(Remark: Graphics omitted.)
POLAROGRAPHY OF CIS- AND TRANS-TETRACYANOCOBALTATE(III) COMPLEXES
Authors: Maki Nobufumi
Published: July 2006

The cis-[CoIII (CN)4, (SO3)2]5− ion in which four cyanides take a non-planar configuration was found to be reduced in two steps from Co(III) to Co(0) via the Co(I) complex, whereas the trans-[CoIII(CN)4(SO3)2]5− ion in which four cyanides take a coplanar structure is reduced to the Co(I) complex and not to Co(0) state at the dropping mercury electrode in aqueous solutions. This cis- vs. trans-distinction with regard to the stability of cobalt(I) complexes may be extended to other kinds of tetracyano complexes, such as cis-Na[Co(CN)4en]·3.5 H2O, trans-K[Co(CN)4(NH3)2]·H2O, and trans-K[Co(CN)4(OH2)2]·(3/4)H2O. The trans-tetracyanodiaqua complex was speculated to be present in a form of polymerized complexes in solution on the basis of the difference in anodic behavior between the resulting Co (I) complex and the aquated Co (I) species formed from the tetracyanodisulfito complexes.
DIELECTRIC BEHAVIOR OF PROPANOLS IN A VARIETY OF SOLVENTS
Authors: Arie Eiji , Nakamura Masahiko , Takahashi Hiroaki , Higasi Keniti
Published: July 2006

The origin of the principal relaxation times of alcohols is under dispute. This letter reports that the principal relaxation times of 1-and 2-propanols change with concentration in two sliglitly different manners by solvents and this difference is due to whether the solvent has the hydrogen-bonding capacity or not.
EFFECTS OF PARAMAGNETIC SHIFT REAGENTS ON THE ROTATION OF AN ISOPROPYL GROUP
Authors: Yamada Kazutoshi , Ishihara Sakiko , Iida Hirotada
Published: July 2006

Observed effects of shift reagents on the rotation of an isopropyl group are reported for two substrate molecules, menthol and menthone, using Eu(DPM)3. The free energies of activation ΔG≠, obtained from the rotation of the isopropyl groups in menthol- and menthone-Eu(DPM)3 complexes are described.
REACTION OF 1-ETHOXY-2,3-DI-tert-BUTYLCYCLOPROPENIUM FLUOROBORATE WITH SODIUM TETRACHIOROCYCLOPENTADIENIDE: FORMATION OF A DIHYDROPENTALENONE DERIVATIVE
Authors: Murata Ichiro , Nakasuji Kazuhiro , Kume Hirokazu
Published: July 2006

Reaction.of 1-ethoxy-2.3-di-tert-butylcyclopropenium fluoroborate with sodium tetrachlorocyclopentadienide in methylene chloride gives 1,2-dihydro-2,3-di-tert-butyl-4,5,6-trichloropentalen-1-one along with 1,2,3,4-tetrachloro-5,6-di-tert-butylcalicene.
EFFECT OF PRESSURE ON THE SOLVENT POLARITY PARAMETER: ET-VALUE
Authors: Tamura Katsuhiro , Ogo Yoshiaki , Imoto Tatsuya
Published: July 2006

Effect of pressure on the ET-values for four kinds of solvents has been investigated at 25°C over the pressure range 1 – 1960 kg/cm2. The ET-values for the solvents studied increased with pressure. Their pressure dependence was affected by the nature of solvents and the detectable differences between them existed in our pressure range. The relation of theET-values to the reaction rates under high pressure has been discussed in brief.
PHOTODEGRADATION BEHAVIOUR OF POLYISOBUTENE OXIDE FOR DISPOSABLE PLASTICS
Authors: Yamagishi Kazuo , Kikuchi Yasuo , Tanaka Kazunobu , Otomo Teruo , Watanabe Shoji
Published: July 2006

Thermally stable polyisobutene oxide was gradually degraded by ultraviolet light and finally converted to volatile compounds. Fundamental photodegradation chemistry of polyisobutene oxide and the possibility of it’s application for disposable plastics were discussed.
CORRELATION BETWEEN J(13C-H) IN AROMATIC METHYL COMPOUNDS AND GROUP OR ORBITAL ELECTRONEGATIVITIES
Authors: Masuda Shozo , Inamoto Naoki
Published: July 2006

The linear correlations of J(13C-H) with group electronegativities (EPhY-) and with orbital electronegativities (XYV) have been presented for 11 aromatic methyl compounds (Ph-Y-CH3) and a new correlation between J(13C-H) and Gordy’s effective nuclear charge (1+n*) was found.
PHOTOAQUATION OF CIS-DIBROMOTETRAAMMINERUTHENIUM (III) COMPLEX
Authors: Ohyoshi Akira , Takebayashi Noriyuki , Hiroshima Yutaka
Published: July 2006

Studies have been made on the photochemistry of aqueous cis-Ru(NH3)4 Br22+. In a solution of pH lower than 2.5, following simple aquation seems to occur; cis-[Ru(NH3)4Br2]+ + H2O →cis-[Ru(NH3)4BrH2O]2+ + Br−. The quantum yield was found to depend on the wavelength of light, but not on the bromide-ion and hydrogen-ion concentrations. The typical, value was respectively 5.6×10−3, 2.7×10−3, and 1.4×10−3 at the irradiation of 330, 382, and 434 nm light.
OBSERVATIONS OF RAINBOW SCATTERING IN CROSSED MOLECULAR BEAMS: K + COS AND K + CS2
Authors: Kusunoki Isao , Mitou Yutaka , Kodera Kumasaburo
Published: July 2006

Differential elastic scattering cross sections have been measured for the systems K + COS and CS2 at different energies in the thermal energy range. The intermolecular potential well depths have been evaluated from the rainbow scattering. The evaluated values ε for the Lennard–Jones(12,6) potentials were 0.37 Kcal/mole for K + COS and 0.41 Kcal/mole for K + CS2, respectively.
SIMPLE SYNTHESIS OF JASMONES THE METAL ION PROMOTED REACTIONS OF 8-ACYLOXYQUINOLINE. II
Authors: Sakan Takeo , Mori Yutaka , Yamazaki Tomio
Published: July 2006

The known diketones, undecane-2,5-dione and cis-undec-8-ene-2,5-dione, are obtained by the reactions of 8-levulinyloxyquinoline with n-hexyl- and cis-3-hexenylmagnesium bromide, respectively, and converted to jasmones by base-catalyzed cyclization.
A CONVENIENT METHOD FOR THE HYDROLYSIS OF VINYL CHLORIDES TO KETONES
Authors: Mukaiyama Teruaki , Imamoto Tsuneo , Kobayashi Susumu
Published: July 2006

A new and useful method for the hydrolysis of vinyl chlorides was investigated by the combined use of TiCl4, methanol and water. Various vinyl chlorides, such as α-chlorostilbene, 1-phenyl-1-chloro-1-propene and 2,6-dimethyl-4-chloro-3-heptene, were hydrolyzed to corresponding ketones in high yields at room temperature. Steroid I was smoothly converted to testosterone propionate II in 96% yield by this method.
THE CRYSTAL STRUCTURE OF CATENA-μ-ETHYLENEDIAMINECADMIUM(II) TETRACYANOCADMATE(II) DIBENZENE CLATHRATE: Cd(en)Cd(CN)4·2C6H6
Authors: Iwamoto Toschitake
Published: July 2006

The crystals of Cd(en)Cd(CN)4·2C6H6 belong to the tetragonal space group P42/mmc with the dimensions a = 8.262(6) and c = 15.495(2) A (Z = 2). The three-dimensional host lattice is built of the network of Cd-CN-Cd and Cd-en-Cd linkages to form two kinds of cavities for the guest benzene molecules. The host en and the guest C6H6 molecules are so flexible and dynamic that precise atomic positions can hardly be determined.
DETERMINATION OF QUANTUM YIELD OF SINGLET OXYGEN FORMATION BY PHOTOSENSITIZATION
Authors: Usui Yoshiharu
Published: July 2006

Quantum yield of singlet oxygen formation for some sensitizers in aqueous solution has been determined by analyzing the concentration dependence of the quantum yield of 2,5-dimethylfuran oxidation in reference to that of methylene blue as a sensitizer.
PHOTOPOLYMERIZATION OF N-VINYLCARBAZOLE IN WHICH EDA COMPLEX IS INVOLVED: PHOTOIONIZATION OF N-VINYLCARBAZOLE IN THE PRESENCE OF ELECTRON ACCEPTORS
Authors: Yamamoto Masahide , Ohoka Masataka , Kitagawa Kuniharu , Nishimoto Sei-ichi , Nishijima Yasunori
Published: July 2006

Photochemical formation of VCZ cation radical and electron acceptor anion radical has been demonstrated by means of flash spectroscopy for the VCZ-electron acceptor systems where exciplex emission can be observed. The ion radicals are produced by one photonic process and they decay by bimolecular recombination.
THE CORRELATION OF THE ESR PARAMETERS OF VARIOUS β-DIKETONE CHELATES OF COPPER(II) WITH THE pKa OF THE LIGANDS
Authors: Yokoi Hiroshi , Kishi Takashi
Published: July 2006

All the ESR and related parameters of various β-diketone chelates of copper(II) in toluene have been recognied to correlate with the pKa of the ligands. Results indicate that both of the σ and π coordination bondings of the complexes become more covalent as the pKa values increase.
NEW SYNTHETIC METHODS OF BIS(ETHYLENEDIAMINE)- AND TETRAAMMINE-CHROMIUM(III) COMPLEXES USING NON-AQUEOUS SOLVENTS
Authors: Muto Masayuki
Published: July 2006

New synthetic methods of bis(ethylenediamine)- and tetraammine-chromium(III) complexes using the matrix method in the liquid state are described. The starting materials are [Cr en3](C1O4)3 and [Cr(NH3)6](C1O4)3. Dimethylsulfoxide and dimethylformamide are used as solvents. The anions (X or L; see text) to be coordinated are added in the form of NH4X and H2L (or HL).
INFRARED REFLECTANCE SPECTRA OF CHEMISORBED FORMATES ON EVAPORATED COPPER AND ALUMINUM SURFACES
Authors: Ito Masatoki , Suëtaka Wataru
Published: July 2006

Infrared spectra of HCOO− and DCOO− chemisorbed on evaporated copper and aluminum surfaces have been observed by high sensitivity reflection techniques. The absence of the antisymmetric OCO stretching band for species on the copper film suggests that the chemisorbed formate molecules are orientated almost vertically on smooth surfaces.
NICKEL(0)-CATALYZED VALENCE ISOMERIZATION OF THE 1,1′-BISHOMOCUBANE SYSTEM
Authors: Takaya Hidemasa , Yamakawa Masashi , Noyori Ryoji
Published: July 2006

In the presence of nickel(0) complexes cis-9,10-dicarbomethoxypentacyclo[4.4.0.02,5.03,8.04,7]decane isomerizes cleanly to give a mixture of endo- and exo-cis-9,10-dicarbomethoxytricyclo[4.2.2.02,5]deca-3,7-dienes.
REACTIONS OF COPPER-CARBENOIDS WITH SULFOXIDES
Authors: Takebayaski Matsuji , Kashiwada Toshinobu , Hamaguchi Masashi , Ibata Toshikazu
Published: July 2006

The copper chelate-catalyzed reaction of α-diazoacetophenones with substituted diphenyl sulfoxides gave two types of products, diaryl sulfides (V) and oxosulfonium ylides (VI), of which ratios depended on the substituents of α-diazoacetophenones and of diaryl sulfoxides. The oxosulfonium ylides exhibit a novel reaction with phenylglyoxal affording oxosulfonium glyoxalylphenacylides (VII) in the presence of copper acetylacetonate. When copper-phthalocyanine was employed as a catalyst, the reaction gave a lactone (X) besides (V).
CALCULATION OF THE PRIMARY RADIATION CHEMICAL YIELDS IN HELIUM ON THE BASIS OF A CLASSICAL COLLISION THEORY
Authors: Ohno Shin-ichi
Published: July 2006

An ab initio calculation of the primary radiolysis yields was examined. The method is based on the classical theory developed by Thomas in 1927 for the collision between two free moving electrons. The results of applying it to the irradiation of He with 100 keV-electrons are: Gion = 2.42, Gex(n 1p) = 0.91, and Gex(n 3S, n 3P) = 0.13.
C-13 NUCLEAR MAGNETIC RESONANCE AS A PROBE OF HELIX-COIL TRANSITION OF POLY-l-METHIONINE
Authors: Tadokoro Shin-ichi , Fujiwara Shizuo , Ichihara Yoshihiro
Published: July 2006

C-13 NMR spectra were measured for poly-l-methionine in CDCl3-trifluoroacetic acid mixtures. The α- and carbonyl carbons showed upfield displacements of 2.3 and 3.4 ppm, respectively, due to the helix-coil transition of the compound. The clearly split peaks assigned to each side-chain carbon of PLM in the α -helix and the random-coil form were observed in the range of the helix-coil transition.
ION-EXCHANGE SEPARATION OF SODIUM AND POTASSIUM WITH COUNTER-CURRENT OF ELUENT AND ELECTROMIGRATION
Authors: Mori Yoshihiro , Ooyasu Tetsuo , Matsuda Hiroyuki
Published: July 2006

The translation of Na+ with an eluent on strong electrolyte cation exchanger column is larger than that of K+, but with electromigration smaller than that of K+. An effective separation of Na+ and K+ may be expected with a simultaneous use of ion-exchange and electromigration. When an electric field[150 v(between electrodes), 3.3 mA] was applied on a strong electrolyte cation exchanger(Diaion PK-228) column(height; 10 cm, diameter; 1 cm) with parallel but reverse direction to the eluent(0.1 N NH4Cl) flow, Na and K(each 0.5 meq) have been separated perfectly by the elution.
X-RAY PHOTOELECTRON SPECTROSCOPY OF SOME INDIUM COMPOUNDS
Authors: Yoshihara Kenji , Shiokawa Takanobu , Maeda Kogoro , Nakai Yosaku , Seto Kazuyoshi
Published: July 2006

X-ray photoelectron spectroscopy of some indium compounds was studied. Chemical shifts were found among the InM4 or M5 electrons emitted from metallic indium, indium oxide, indium EDTA·OH and indium EDTA. It was shown that the simple charge-binding energy relationship did not always hold good for the complex compounds studied.
SYNTHESIS OF 1,2:3,4- AND 1,2:4,5-DIANHYDROINOSITOLS
Authors: Suami Tetsuo , Ogawa Seiichiro , Oki Shuichi
Published: July 2006

All eleven stereoisomers of dianhydroinositols (1–11), except 1,4-anhydro derivatives, have been synthesized from inositol disulfonates and their structures were established by PMR spectra together with a reaction mechanism. A migration of oxirane ring caused by participation of neighboring hydroxyl group induced an isomerization of the epoxide in an alkaline medium.
A TECHNETIUM PORPHYRIN: μ-[MESOPORPHYRIN IX DIMETHYL ESTERATO]BIS[TRICARBONYLTECHNETIUM(I)]
Authors: Tsutsui Minoru , Hrung CP
Published: July 2006

The preparation and the characterization of the first technetium porphyrin is reported. The structure of the complex is proposed to have an identical one to that of μ-[mesoporphyrin IX dimethyl esterato]bis[tricarbonylrhenium(I)].
ELECTRON PARAMAGNETIC RESONANCE OF TRIMETHYLENEMETHANE FORMED BY RADIOLYSIS OF METHYLENECYCLOPROPANE
Authors: Yamaguchi Tetsuo , Irie Masahiro , Yoshida Hiroshi
Published: July 2006

Trimethylenemethane was formed by the radiolysis of methylenecyclopropane at 77°K, and its epr spectrum was studied. From the ΔMS=1 spectrum epr parameters were determined as Tzz=9.17±0.05G, D=(2.37±0.01)×10−2 cm−1 and E = 0. The ΔMS=2 transition showed seven hyperfine lines with a separation of 9G.
THE ANOMERIC EFFECT IN 1,3,5-TRITHIANE DERIVATIVES
Authors: Oki Michinori , Sugawara Tadashi , Iwamura Hiizu
Published: July 2006

Strong anomeric effect is observed in 1,3,5-trithiane derivatives. Phenylthio-axial conformation is found to be more stable than the equatorial in 2-phenylthio-1,3,5-trithiane in contrast to the fact that the anomeric effect is very small in 2-alkylthiothiane. 2-Benzoyloxy-1,3,5-trithane exists solely as the benzoyloxy-axial conformer.
CHEMICAL REACTIONS OF ELECTRON DONOR-ACCEPTOR SYSTEM: ON THE MECHANISM OF TRICYANOVINYLATION REACTION OF AROMATIC AMINES WITH TETRACYANOETHYLENE
Authors: Shirota Yasuhiko , Nogami Takashi , Hasegawa Yoshiki , Mikawa Hiroshi
Published: July 2006

A new mechanism has been proposed for the tricyanovinylation reaction of aromatic amines with tetracyanoethylene.
TWO ISOMERS OF POTASSIUM μ-(TRANS-HYPONITRITO)-BIS{PENTACYANOCOBALTATE(III)}
Authors: Okamura Hiromichi , Miki Eiichi , Mizumachi Kunihiko , Ishimori Tatsujiro
Published: July 2006

Orange and yellow complex salts were prepared by a reaction of black-[Co(NO)(NH3)5]Cl2 with an aqueous solution of potassium cyanide. On the basis of IR and Raman spectra of the complexes and of their decomposition products, they are considered to be dimeric, bridged with a trans-hyponitrito group, and formulated as K6[CO2(CN)10(N2O2)]·nH2O(n = 2 and 4 for the orange and yellow salts, respectively).
PHOTOCHROMISM OF ISO-PROPYLAMMONIUM MOLYBDATE
Authors: Yamase Toshihiro , Hayashi Hiroh , Ikawa Tsuneo
Published: July 2006

Iso-propylammonium dimolybdate dihydrate, which shows a photochromic activity in the solid state and forms a blue color in the aqueous solution on exposure to UV, has been investigated by ESR. It was confirmed that the signal responsible for the color corresponded to the formation of Mo(V).
THE RADICAL ANION OF SODIUM 9,10-ANTHRAQUINONE-2-SULFONATE STABILIZED BY BINDING WITH MICELLES
Authors: Kano Koji , Matsuo Taku
Published: July 2006

The radical anion of sodium 9,10-anthraquinone-2-sulfonate, which was produced by the photolysis of the quinone in aerobic aqueous solution (pH 8.0) containing appropriate amounts of anionic and/or non-ionic surfactants, was detected by means of ESR and UV spectroscopy. The formation of the radical anion was observed above pH 6.8. Relationship between the concentration of surfactant and that of the radical anion gave a profile which showed the typical micellar effects. It is suggested that the micelles protect the radical anion from quenchers, such as oxygen, water, and other reagents, because the radical anion is incorporated into the micellar interior.
THEORETICAL EVALUATION OF TRISHOMOCYCLOPROPENYL AND BISHOMOSQUARE PYRAMIDAL CATIONS
Authors: Morio Kazuhiko , Masamune Satoru
Published: July 2006

The lowest energy minimum is calculated for two systems, bicyclo[3.1.0]hex-3-yl and tricyclo[3.1.1.02’4]hept-6-yl, and corresponds to the C3v and C2v structures, respectively.
A CONVENIENT SYNTHESIS OF THE ANTIBIOTIC BOTRYODIPLODIN
Authors: Mukaiyama Teruaki , Wada Makoto , Hanna Junichi
Published: July 2006

It was established that the antibiotic and anti-leukemic agent botryodiplodin (VIIIa) is synthesized in good yield from cis-α-methyl β-acetyl-γ-butyrolactone, produced by the reaction of of α-methyl-α-angelicalactone with formaldehyde.
PHOTOVOLTAIC EFFECT ON THE SURFACE OF RUTILE SINGLE CRYSTAL
Authors: Iwaki Toru , Komuro Masayoshi , Kondo Takao , Miura Masaji
Published: July 2006

The photovoltaic effect on the surface of rutile single crystal was studied at room temperature through producing the inhomogeneous distribution of oxygen vacancies by application of electric field at high temperatures. It was found from the photovoltage and the resistance that the barrier height near the positive electrode increases linearly with the applied voltage.
A CONVENIENT METHOD FOR THE SYNTHESIS OF δ-ALKOXY-β-KETOESTER THE TITANIUM TETRACHLORIDE-ACTIVATED REACTION OF DIKETENE WITH ACETAL
Authors: Izawa Toshio , Mukaiyama Teruaki
Published: July 2006

It was established that, in the presence of TiCl4, diketene [1] reacts with acetals [2] at −78∼−20°C to afford δ-alkoxy-β-ketoesters [3] in good yields. This reaction provides a novel method for the introduction of –COCH2COCH2– unit to an electrophile as acetal activated by TiCl4.
THE GENUINE PRECURSOR FOR THE BIOSYNTHESIS OF PROTOANEMONIN IN RANUNCULUS GLABER
Authors: Suga Takayuki , Hirata Toshifumi , Horikawa Tomoko , Waki Noriko
Published: July 2006

Protoanemonin (I) was biosynthesized from radioactive tracers, such as sodium [5-14C]α-ketoglutarate, sodium [1-14C]acetate, sodium [2,3-14C]succinate, and [2-14C]glucose, in Ranunculus glaber Makino. Its labeling patterns have demonstrated that the genuine precursor of the lactone I is α-ketoglutarate.
A NEW METHOD FOR GENERATION OF ETHOXYCARBONYLNITRENE. A BASE-INDUCED DECOMPOSITION OF N-(p-TOLUENESULFONYLOXY)URETHANE IN A CATIONIC MICELLE
Authors: Mitani Michiharu , Tsuchida Teruko , Koyama Kikuhiko
Published: July 2006

A base-induced decomposition of N-(p-toluenesulfonyloxy)urethane in an emulsifying system leading to ethoxycarbonylnitrene which was trapped by benzene, toluene, and cyclohexane yielding its addition and insertion products is described.
A 1,3-DIPOLE IN SULFILIMINE-PHOSPHINE SYSTEM (II). THE REACTION OF SULFILIMINE-PHOSPHINE SYSTEM WITH ALCOHOLS
Authors: Aida Tetsuo , Furukawa Naomichi , Oae Shigeru
Published: July 2006

Alkyl phenyl N-p-tosylsulfilimine and phosphine react with various alcohols affording the phosphinimine(II) and the complex(IV) together with the reduced and alkyl-exchanged sulfides in which the alkyl groups come from the alcohols used. The results indicate the initial formation of a 1,3-dipole.
METHYLSULFONIUM SALTS OF 1,3,5-TRITHIANE
Authors: Iwamura Hiizu , Fukunaga Michio
Published: July 2006

Mono-S-methylation of 1,3,5-trithiane (1) is effected smoothly by heating 1 in dimethyl sulfate or in methyl p-toluenesulfonate. A mixture of cis- and trans-1,3-dimethylbissulfonium salts of 1 is obtained by methylation with the Meerwein or Borch reagents. With all attempts no trimethylation of 1 is successful. Nucleophilicity of the last sulfur atom is suppressed to a considerable extent by the two sulfur atoms already methylated.
CYCLIC CROSS-CONJUGATED HYDROCARBONS HAVING INSERTED p-QUINOID RING. IV. SYNTHESIS OF 3″-METHYL-2″,4″, 5″-TRICYANO-1-CYCLOHEPTA-TRIENYLIDENE-4-CYCLOPENTADIENYLIDENE-2,5-CYCLOHEXADIENE
Authors: Takahashi Kazuko , Oikava Itsuji , Takase Kahei
Published: July 2006

3″-Methyl-2″,4″,5″-tricyano-1-cycloheptatrienylidene-4-cyclopentadienylidene-2,5-cyclohexadiene (IX), a stable derivative of a new cyclic cross-conjugated hydrocarbon, [5.6.7]quinarene, has been synthesized by the hydride abstraction of tetramethylammonium 3-methyl-2,4,5-tricyano-1-(p-tropylphenyl)cyclopentadienide (VIIIb).
BEHAVIOR OF MoO2Cl2·H2O ON HEATING
Authors: Matsuzaki Ryoko , Kaneko Hisao , Saeki Yuzo
Published: July 2006

In an argon stream, MoO2Cl2·H2O decomposes above 80°C to HMo9O27Cl and HCl. The HMo9O27Cl formed decomposes above 205°C to a molybdenum oxide showing a hitherto unknown X-ray diffraction pattern and HCl. The decomposition is accompanied by the sublimation of MoO2Cl2·H2O. In an HCl stream, MoO2Cl2·H2O sublimes at 50–100°C. The sublimation is accompanied by the decomposition above 150°C.
REACTIONS OF PERFLUORO-2-METHYLPENTENE-2 WITH AROMATIC NUCLEOPHILES
Authors: Ishikawa Nobuo , Nagashima Akira , Sekiya Akira
Published: July 2006

While one mole of phenol reacted with perfluoro-2-methylpentene-2 [2] to give usual phenoxy substituted compound [5], two or four moles of aniline reacted with 2 affording quinoline derivatives.
THE ISOLATION AND CHARACTERIZATION OF COBALT(III) COMPLEXES OBTAINED FROM THE REACTIONS OF ETHYLENEDIAMINETETRAACETATO-AND R-PROPYLENEDIAMINETETRAACETATO-COBALTATE(III) WITH ETHYLENEDIAMINE
Authors: Doh Myung-Ki , Ogino Hiroshi , Fujita Junnosuke , Saito Kazuo , Tanaka Nobuyuki
Published: July 2006

Five new mixed ligand cobalt(III) complexes containing ethylenediamine(or R-propylenediamine)tetra(or tri)acetate and ethylenediamine have been obtained by the reactions of [Co(edta)]− and [Co(R-pdta)]− with ethylenediamine in water. The reactivity of these mixed complexes with ethylenediamine contradicts the mechanism of the reactions of [Co(edta)]− and [Co(pdta)]− with ethylenediamine proposed by Busch et.al.
PHOTOOXIDATION OF THE SEX PHEROMONE (Z,E)-9,12-TETRADECADIENYL-l-ACETATE
Authors: Goto Giichi , Masuoka Yutaka , Hiraga Kentaro
Published: July 2006

The sex pheromone (Z,E)-9,12-tetradecadienyl-1-acetate (1) was readily converted into inactive 13-hydroperoxy-(Z,E)-9,11-tetradecadienyl-1-acetate (2) and 9-hydroperoxy-(E,E)-10,12-tetradecadienyl-1-acetate (3) by exposure to air and sunlight without intentional addition of sensitizer.
CONCENTRATION DEPENDENT CIRCULAR DICHROISM OF POLY-γ-(1-NAPHTHYLMETHYL)-l-GLUTAMATE
Authors: Enomoto Takamichi , Nomori Hiroyuki , Hatano Masahiro
Published: July 2006

A marked concentration dependence was observed for the circular dichroism of poly-γ-(1-naphthylmethyl)-l-glutamate in ethylene chlorohydrin. This fact was explained in terms of the formation of the β-structure in the solution at high concentrations of the polyglutamate and the subsequent restriction of the side chain orientation relative to the dissymmetric field in the solution.
A NOVEL PHOTO-CYCLOADDITION REACTION OF 2-ALKOXY-1,4-NAPHTHOQUINONES WITH OLEFINS
Authors: Maruyama Kazuhiro , Otsuki Tetsuo
Published: July 2006

Photo-cycloaddition compounds, characterized by forming tetrahydropyran ring, were obtained in a good yield in the photochemical reaction of 2-alkoxy-1,4-naphthoquinones with several olefins. This type of photo-cycloaddition reaction between quinones and olefins has never been reported so far.
THE ISOLATION OF TRANS AND CIS ISOMERS OF DICARBONATOBIS(PYRIDINE)COBALTATE(III)
Authors: Ida Yayoi , Kobayashi Kazuhiro , Shibata Muraji
Published: July 2006

Two isomeric compounds, trans- and cis-K[Co(CO3)2(py)2]·3H2O, have been isolated from a reaction mixture of the [Co(CO3)3]3− ion with pyridine. The absorption spectrum of the trans complex revealed distinct splitting of the second absorption band.
VACUUM THERMOLYSIS OF ARYL ACETATES. A MECHANISTIC STUDY
Authors: Nishida Shinya , Imai Toshiro , Tsuji Takashi
Published: July 2006

p-Tolyl and phenyl trideuterioacetates were thermolyzed in a vacuum. H1 -nmr of the produced p-cresol showed no deuterium incorporation at its ortho position, which disfavoured the 6-membered cyclic mechanism. Pressure-independence of the yield of phenol made the radical chain mechanism unlikely, too. A possible mechanism is proposed.
KINETICS AND MECHANISM ON THE AQUATION AND ANATION REACTIONS OF MONOCHLOROACETATOPENTAAMMINERUTHENIUM(III) COMPLEX IN AQUEOUS SOLUTION
Authors: Sakamoto Hiroyuki , Yoshikuni Kenichiro , Ohno Satoshi , Ohkubo Katsutoshi , Ohyoshi Akira
Published: July 2006

The aquation and anation reactions of monochloroacetatopentaammineruthenium(III) complex are studied to know the elementary reaction mechanism under the same reaction conditions. The aquation reaction seems to take the SN 2 mechanism, through the process which involves the seven-coordinated intermediate while the anation reaction is well illustrated by the limiting SN 1 mechanism. The elementary rate constants for the anation reaction was determined.
CRYSTALLIZATION OF METASTABLE QUARTZ TO COESITE
Authors: Naka Shigeharu , Kameyama Tetsuya , Ito Suketoshi , Inagaki Michio
Published: July 2006

Morphological development of coesite crystal obtained at 550∼900°C under 23∼55 kb was strongly influenced by the state of aggregates of intermediate quartz. The sizes of quartz aggregates and coesite crystals decreased with increaseing pressure and with decreasing temperature.
COORDINATION COMPOUNDS OF CALCEIN BLUE FOR NEW LASER MATERIAL
Authors: Ishibashi Nobuhiko , Imasaka Totaro , Ogawa Teiichiro , Maeda Mitsuo , Miyazoe Yasushi
Published: July 2006

Coordination compounds of calcein blue with Al, Ca, Sr, and Ba were found to lase. Al-calcein blue efficiently lases at around 419 nm and the others lase at around 450 nm.
LASER PYROLYSIS GAS CHROMATOGRAPHY OF SEVERAL AROMATIC CARBOXYLIC ACIDS. EFFECT OF ADDITION OF SODIUM BOROHYDRIDE
Authors: Kojima Tsugio , Morishita Fujio , Uegaki Yoshihiko
Published: July 2006

Aromatic carboxylic acids mixed with sodium borohydride (NaBH4) were degraded by a defocused laser beam in the normal pulse mode. The addition of NaBH4 resulted in significant increases in the yields of decarboxylated products and the pyrograms obtained provided useful information about the structures of parent compounds.
OXIDATION OF α-PHENYLETHYL CHLORIDE BY METAL OXIDES. NEW SYNTHETIC METHOD OF BIS(α-PHENYLE-THYL) ETHER
Authors: Akiyama Fuminori
Published: July 2006

Oxidation of oc-phenylethyl chloride by metal oxides were investigated. When benzene or carbon tetrachloride solution of α-phenylethyl chloride was refluxed in the presence of various metal oxides, formation of bis(α-phenylethyl) ether was observed only in the cases of three metal oxides, i.e., mercuric oxide, lead dioxide, and thallium(III) oxide in considerable yields.
NEW HALOGENATED MONOTERPENES FROM DESMIA (CHONDROCOCCUS) HORNEMANNI
Authors: Ichikawa Nobutaka , Naya Yoko , Enomoto Sachito
Published: July 2006

Constituents of fragrant subtidal red algae on Amami Island coasts were investigated, and the structures of several halogenated monoterpene compounds (II-XII) have been established.
SKELETAL REARRANGEMENT OF MIYACONITINE
Authors: Ichinohe Yoshiyuki , Yamaguchi Makiko , Matsushita Kazuhiro
Published: July 2006

Alkaline hydrolysis of miyaconitine (I) or miyaconitinone (II) has been found to give skeletal rearrangement products, miyaconine (IV) and apomiyaconine (V).
THE SYNTHESIS OF QUINOCHALCONES
Authors: Obara Heitaro , Onodera Jun-ichi
Published: July 2006

2′,4,4′-Trihydroxy-, 2′,4-dihydroxy-4′-methoxy-, and 2′-hydroxy-4,4′-dimethoxy-3′,6′-quinochalcone (VI, X, and XIII) were obtained by the oxidation of the corresponding chalcones with nitric acid, and their properties have been compared with those of the red pigment from the flowers of Carthamus tinctorius L.
IDENTIFICATION OF 1,6-ANHYDRO-3-DEOXY-β-d-GLUCOPYRANOSEN AS A THERMAL DECOMPOSITION PRODUCT OF CELLULOSE
Authors: Ohnishi Akio , Takagi Eriko , Kato Kunio
Published: July 2006

1,6-Anhydro-3-deoxy-β-d-glucopyranosen (I) was isolated from liquid pyrolysate of cellulose by GLPC and identified from IR, UV, mass and NMR spectra. It seems to be a thermal decomposition intermediate between levoglucosan (II) and levoglucosenone (III).
CYCLO-COUPLING OF α,ω-DIHALOALKANES VIA OXIDATIVE ADDITION TO NICKEL(0) COMPLEX
Authors: Takahashi Shigetoshi , Suzuki Yoshiaki , Hagihara Nobue
Published: July 2006

The nickel(0)-dipyridyl complex has been found to be a powerful reagent for preparing cycloalkanes from α,ω-dihaloalkanes. Dihalides, Br(CH2)nBr n=3,4,5,6, gave cyclic products in high yields and dihalides, X(CH2)nX n=1,2, X=Cl,Br, afforded ethylene.
SENSITIVITY CALIBRATION OF A RAMAN SPECTROMETER USING THE ROTATIONAL RAMAN SPECTRA OF DEUTERIUM
Authors: Hamaguchi Hiro-o , Harada Issei , Shimanouchi Takehiko
Published: July 2006

The dependence of the sensitivity of a Raman spectrometer on the wavelength of light was examined by comparing the observed and calculated intensity distributions of the rotational Raman spectra of deuterium (D2). Relative sensitivity curves were obtained in the region of the wavelength of the five lines of the argon ion laser.
ELEMENTARY STEPS OF HYDROGEN EVOLUTION REACTION AT A GOLD ELECTRODE IN AQUEOUS SULFURIC ACID
Authors: Sasaki Takesi , Matsuda Akiya
Published: July 2006

The rate and overvoltage of the constituent elementary steps of the hydrogen evolution reaction at a gold electrode in aqueous sulfuric acid were determined by means of a galvanostatic transient method together with a conventional steady state polarization method. It was concluded that the reaction proceeded through the discharge of hydrated proton which was followed by the recombination of adsorbed hydrogen atoms and the overvoltage of the former step was caused by the free charge on the electrode surface and that of the latter was attributed to the decrease in the electronic work function caused by the adsorbed hydrogen atoms.
ISOPROPENYLATION OF OLEFINS VIA THE REACTION OF IODINE WITH LITHIUM TRIALKYLISOPROPENYLBORATES OBTAINABLE FROM TRIALKYLBORANES
Authors: Miyaura Norio , Tagami Hiroyasu , Itoh Mitsuomi , Suzuki Akira
Published: July 2006

Lithium trialkylisopropenylborates readily available from trialkylboranes and isopropenyllithium give the corresponding isopropenylalkanes in good yields by treatment with iodine. This procedure was applied to synthesize monoterpene derivatives such as limonene, diprene and an isomeric dihydrolinalool.
A CONVENIENT METHOD FOR THE SYNTHESIS OF α-ALKOXYCARBOXAMIDE DERIVATIVES
Authors: Mukaiyama Teruaki , Watanabe Kenzo , Shiono Manzo
Published: July 2006

It was established that, in the presence of TiCl4, isocyanides react with acetals to afford α-alkoxycarboxamide derivatives in good yields.
A CONVENIENT METHOD FOR THE PREPARATION OF GUANIDINIUM SULFATE FROM SULFUR TRIOXIDE-AMMONIA REACTION MIXTURE AND UREA
Authors: Tanihara Koichi
Published: July 2006

A convenient method of preparing guanidinium sulfate in a good yield has been established, which makes use of the reaction between urea and SO3–NH3 reaction mixture under an atmosphere of ammonia, and a series of novel treatments of the reaction mixture thus obtained.
FLUORESCENCE SPECTRUM OF PYRIMIDINE VAPOR FROM THE ZERO-POINT VIBRATIONAL LEVEL OF 1B1(n, π*) STATE
Authors: Yamazaki Iwao , Uchida Katsuo , Baba Hiroaki
Published: July 2006

The fluorescence spectrum of pyrimidine vapor which originates from the zero-point vibrational level of the 1B1(n, π*) state has been measured. Most of the strong bands can be explained in terms of three totally-symmetric vibrations: v6a″, v12″, and V9a″. No phosphorescence was observed from pyrimidine vapor at various pressures.
REACTION OP CYCLOALKANONES WITH COPPER(II) HALIDE. III. REACTION OP CYCLOHEXANONES AND STEROIDAL KETONES WITH COPPER(II) HALIDE IN ETHYLENE GLYCOL
Authors: Satoh J Yasuo , Yokoyama C Toru , Haruta A Mitsuhiro , Nishizawa Kyoko , Hirose Masakatsu , Hagitani Akira
Published: July 2006

It was found that, in the presence of small amounts of copper(II) halide, cyclohexanones and steroidal ketones in ethylene glycol gave smoothly their acetals. Moreover, the reaction of steroidal ketones with 5 molar equiv. of copper(II) halide in ethylene glycol/dioxane (1:1) gave their α-haloacetals.
REDUCTIVE ELIMINATION OF β-BENZOYLOXY SULFIDES BY THE USE OF TiCl4–Zn A CONVENIENT METHOD FOR KETONE METHYLENATION
Authors: Mukaiyama Teruaki , Watanabe Yutaka , Shiono Manzo
Published: July 2006

Exo methylene compounds were prepared in good yields by the reductive eliminations of β-benzoyloxy sulfides, produced by the reactions between ketones and phenylthiomethyllithium and subsequent benzoylations, with TiCl4–Zn.
THERMOLYSIS OF ETHYLENE EPISULFOXIDE IN METHANOL. PUMMERER TYPE REARRANGEMENT OF THIOLSULFINATES
Authors: Kondo Kiyosi , Negishi Akira
Published: July 2006

The thermal reaction of ethylene episulfoxide in methanol at 90°C gave 2-methoxyethyl 2-methoxyethanethiolsulfinate as a primary product which was further transformed into 1, 2, 2′-trimethoxydiethyl disulfide. This type of Pummerer rearrangement could also be observed when ethyl ethanethiolsulfinate or 2-acetoxyethyl 2-acetoxyethanethiolsulfinate was treated under the same condition.
THE REACTION OF ACYLFERROCENES WITH METHYLMAGNESIUM HALIDES. THE INTERVENTION OF CARBONIUM-ION-LIKE INTERMEDIATES
Authors: Bozak Richard E , Riley Robert G , Fawns William P , Javaheripour Hooshmand
Published: July 2006

The reactions of several acylferrocenes with methylmagnesium halides are examined. Some carbinol stabilities with adsorbents are reported.
COBALT-59 NUCLEAR MAGNETIC RESONANCE STUDY OF TRIS(PROPYLENEDIAMINE)COBALT(III) COMPLEXES
Authors: Koike Yasuo , Yajima Fumikazu , Yamasaki Akira , Fujiwara Shizuo
Published: July 2006

The difference of cobalt-59 chemical shift is much larger in ob-lel isomerism than that in mer-fac isomerism. The line widths of lel-isomers are 0.10 gauss and ob-isomers 0.14 gauss. The chemical shift values of four [Co(1-pn)3]3+ are as follows: Δ(mer), 938 ppm; Δ(fac), 951 ppm; Λ(mer), 863 ppm; and Λ(fac), 859 ppm upfield from external [Co(NH3)6]3+ standard.
GEL FORMATION OF CURDLAN-TYPE POLYSACCHARIDE IN DMSO-H2O MIXED SOLVENTS
Authors: Aizawa Masuo , Takahashi Masaaki , Suzuki Shuichi
Published: July 2006

Curdlan-type polysaccharide was found to form a thermo-reversible gel in DMSO with the addition of water. The sol–gel transition was also reversible with respect to mole fraction of DMSO. Drastic changes in light scattering intensity, viscosity and optical rotation of the polysaccharide in DMSO with the addition of water were observed around the sol–gel transition point. The gelation mechanism of the polysaccharide in DMSO-H2O mixed solvents is discussed.
ON THE CATALYTIC SPECIES IN THE HYDROXYMETHYLATION OF PROFYLENE BY IRON PENTACARBONYL-TERTIARY AMINE CATALYST
Authors: Wada Fumio , Matsuda Tsutomu
Published: July 2006

Studies on the pressure and temperature dependences of the Reppe’s hydroxymethylation of propylene by Fe(CO)5-tertiary amine catalyst indicated that the catalytic species was hydridotetracarbonyl ferrate, HFe(CO)4− The reaction was found to proceed preferably under the condition where the dissociation, HFe(CO)4− \ightleftharpoons HFe(CO)3−+CO, could occur to form a coordinatively unsaturated species.
ASYMMETRIC REDUCTION OF KETONES VIA HYDROSILYLATION CATALYZED BY A RHODIUM(I) COMPLEX WITH CHIRAL PHOSPHINE LIGANDS. II. ON THE MECHANISM OF THE INDUCTION OF ASYMMETRY
Authors: Ojima Iwao , Nagai Yoichiro
Published: July 2006

Effective asymmetric reduction of ketones has been achieved via catalytic hydrosilylation using various hydrosilanes in the presence of a rhodium(I) complex with optically active phosphine ligands. The mechanism of the induction of asymmetry is proposed in view of the stereochemical course of the reaction.
A CONVENIENT METHOD FOR THE PREPARATION OF β-HYDROXY THIOLESTERS AND ESTERS
Authors: Inomata Katsuhiko , Kawahara Tatsuo , Mukaiyama Teruaki
Published: July 2006

It was found that thioboronite reacted with substituted ketene (produced from α-haloacyl halide and zinc dust) and carbonyl compounds to give the corresponding α-substituted β-hydroxyalkanethioates in good yields. Also, it was established that β-hydroxyalkanoates were obtained in good yields by utilizing aluminum alkoxide in place of thioboronite in the above reaction.
SOLID PHASE PEPTIDE SYNTHESIS BY OXIDATION-REDUCTION CONDENSATION SPEED-UP BY USE OF TRI-n-BUTYLPHOSPHINE AS REDUCING REAGENT
Authors: Ueki Masaaki , Ikeda Shigeru
Published: July 2006

Use of tri-n-butylphosphine as a reducing reagent in solid phase peptide synthesis by oxidation-reduction condensation is studied. Attachment of the first amino acid to hydroxymethyl resin reached the amount suitable for the succeeding peptide bond elongation within 1 hr. Key of this reaction is to keep the concentration as high as possible.
NUCLEOPHILIC PHOTO-SUBSTITUTION REACTION OF ANTHRAQUINONE DERIVATIVES. III THE PHOTOAMINATION OF 1-AMINO-2,4-DIBROMOANTHRAQUINONE
Authors: Inoue Haruo , Hida Mitsuhiko
Published: July 2006

1-Amino-2,4-dibromoanthraquinone (I) was photoaminated by alkylamines with the irradiation of the light corresponding to the first absorption band of (I). The photoamination in benzene did not require oxygen and was quenched by anthracene, while the photoamination in acetonitrile did require oxygen and was not quenched by anthracene. Possible mechanism involving an inversion between nπ* and ππ* level was discussed.
INTRAMOLECULAR RING CLOSURE OF 1,2,3,4-TETRACHLORO-6-(AZULEN-1-YL)FULVENE. FORMATION OF A CYCLOHEPT[cd]-s-INDACENE DERIVATIVE
Authors: Murata Ichiro , Yamamoto Kagetoshi , Tamura Mitsuhisa
Published: July 2006

8,9,10-Trichlorocyclohept[cd]-s-indacene (4), a novel tetracyclic conjugated pi-electron system, has been synthesized by employing an intramolecular ring closure of 1,2,3,4-tetrachloro-6-(azulen-1-yl)fulvene (3). Both the nmr data of 4 and SCF-MO calculation for the carbon skeleton of 4 have suggested that a polar structure (4a), such as sesquifulvalene, is a main contributor to the ground state of 4.
SMALL RING COMPOUNDS-III. A STUDY ON [4.3.2]-, [5.3.2]-, AND [4.4.1]PROPELLANONE ACETALS
Authors: Kunai Atsutaka , Ishii Tsumoru , Odaira Yoshinobu
Published: July 2006

The particular mass spectral behavior of [4.3.2]propellan-7-one and [5.3.2]propellan-2-one ethylene acetals, and 11,11-dimethoxy and diethoxy[4.4.1]propellanes is discussed.
ELECTROLYTIC OXIDATION OF SODIUM THIOSULFATE SOLUTION
Authors: Yokosuka Futoshi , Takizawa Masahiro , Okuwaki Akitsugu , Okabe Taijiro
Published: July 2006

The electrolysis of a sodium thiosulfate solution was done with platinum electrodes. In neutral solution the thiosulfate was first converted into sulfate, sulfite, di-, tri-, and tetrathionates. The sulfite, tri-, and tetrathionates were finally oxidized to sulfate. In alkaline solution sulfite and trithionate formed as intermediates, and were completely oxidized to sulfate.
REACTION OF ENOL ACETATE WITH ACETAL AND CARBONYL COMPOUND IN THE PRESENCE OF LEWIS ACID
Authors: Mukaiyama Teruaki , Izawa Toshio , Saigo Kazuhiko
Published: July 2006

It was found that, in the presence of Lewis acid such as TiCl4, AlCl3, SnCl4, ZnCl2, and BF3·O(C2H5)2, enol acetate reacts with various acetals and benzaldehyde to afford the corresponding aldol-type addition products in good yields.
THE SYNTHESES AND PROPERTIES OF TWO ANALOGS OF CARTHAMIN
Authors: Obara Heitaro , Onodera Jun-ichi , Abe Satoshi
Published: July 2006

Two analogs of carthamin, 3′-methoxy-2′,4,4′,6′-tetrahydroxychalcone (VII) and 2′ -methoxy-3′ ,4,4′ ,6′ -tetrahydroxychalcone (XI) have been prepared and their properties compared with those of carthamin. The disagreement of the behavior between these synthetic chalcones and carthamin has not supported the conventional structure of carthamin.
SYNTHESIS AND PHOTOCHEMISTRY OF 2-CYCLOOCTENE-1,4-DIONE
Authors: Kayama Yasutaka , Oda Masaji , Kitahapa Yoshio
Published: July 2006

cis-2-Cyclooctene-1,4-dione 1 is prepared starting from 1,3-cyclooctadiene. Photoirradiation of 1 in ether gives a [π2s+2a] dimer, while irradiations in the presence of cyclic dienes give trans- [2+4]cycloadducts. The intermediacy of trans-2-cyclooctene-1,4-dione is suggested.
ENHANCEMENT OF THE PFEIFFER EFFECT IN TRIS(1,10-PHENANTHROLINE)-ZINC(II)-l-STRYCHNINE SYSTEM
Authors: Yoneda Hayami , Miyoshi Katsuhiko , Suzuki Shingo
Published: July 2006

The Pfeiffer effect in [Zn(phen)3]2+-l-strychnine sulfate system was found to be enhanced by the addition of electrolytes. This phenomenon was interpreted in terms of the weakened electrostatic repulsion between the complex and l-strychnine cations. Hydrophobic bonding between the two cations was suggested from the observation that the Pfeiffer rotation of this system is diminished by the addition of non-electrolytes.
THE SYNTHESIS OF 3-BENZOYL-4-METHYLENECYCL0BUT-1-ENE AND 6-METHYLENE-1-OXASPIRO[2,3]HEX-4-ENE, AND THEIR RING EXPANSION INTO METHYLENECYCLOPENTENONES
Authors: Ueda Kozaburo , Toda Fumio
Published: July 2006

The reaction of 2,3,3-tribromo-1-diphenylhydroxymethyl-4-diphenylmethylenecyclobut-1-ene (I) with AgClO4 afforded new 4,5-dibromo-2,2-diphenyl-6-diphenylmethylene-1-oxaspiro [2,3]hex-4-ene (VI) and 3-benzoyl-1,2-dibromo-3-phenyl-4-diphenylmethylenecyclobut-1-ene (VIII), probably via the methylenecyclobutenylium ion (II). New acid-catalyzed ring expansion reaction of VI to afford 3,4-dibromo-2,2-diphenyl-5-diphenylmethylenecyclopent-3-en-1-one (XIV) and 2,3-dibromo-5,5-diphenyl-4-diphenylmethylenecyclopent-2-en-1-one (XV) was found.
STEREOSELECTIVE REACTIONS OF (+)-(R)-α(p-TOLYLSULFINYL)ACETOPHENONE WITH ALKYL GRIGNARD REAGENTS IN ETHYL ETHER
Authors: Kunieda Norio , Nokami Junzo , Kinoshita Masayoshi
Published: July 2006

(+)-(R)-α(p-Tolylsulfinyl)acetophenone (I) reacts with alkyl Grignard reagents in ethyl ether to give the corresponding diastereomeric alcohols (II). The ratio of RSSC -II and RS RC-II obtained was about 7 : 3. The 1,3-asymmetric induction in this reaction is discussed.
CYCLOADDITIONS OF DIAZIRIDINONE
Authors: Ohshiro Yoshiki , Komatsu Mitsuo , Yamamoto Yojiro , Takaki Ken , Agawa Toshio
Published: July 2006

Di-tert-butyldiaziridinone underwent cycloadditions to diphenylketene and benzoyl isocyanate, and to benzonitrile in the presence of Lewis acid as a catalyst.
OXYGEN-INDUCED 1,4-ADDITION REACTION OF ORGANOBORANES TO CROTONALDIMINE
Authors: Miyaura Norio , Kashiwagi Masatoshi , Itoh Mitsuomi , Suzuki Akira
Published: July 2006

Trialkylboranes undergo fast 1,4-addition to crotonaldimine in the presence of catalytic amounts of air to give, after methanolysis, the corresponding saturated aldimines in good yields. This reaction is considered to proceed through a radical process.
STRUCTURE OF DIVALENT ADENINE ION PROTONATED AT N(1) AND N(7)
Authors: Iwasaki Hitoshi
Published: July 2006

An X-ray study on the structure of adenine dihydrochloride has revealed that the base ions are protonated at N(1) and N(7). As a result of the protonation at N(7), the geometry of the imidazole ring differs significantly from those observed in neutral and N(1)- monoprotonated bases.