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Volume 15, Issue 2
Displaying 1-37 of 37 articles from this issue
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Takao Saito, Michio Nakane, Masanobu Endo, Hiromi Yamashita, Yoko Oyam ...1986 Volume 15 Issue 2 Pages 135-138
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA Wittig-type reaction of N-(1,2-diarylethenyl)iminophosphoranes with isocyanates gave C=C-conjugated carbodiimides, which were utilized in the synthesis of heterocycles.View full abstract -
Takashi Shibahara, Hiroaki Miyake, Kazuhiro Kobayashi, Hisao Kuroya1986 Volume 15 Issue 2 Pages 139-142
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA molybdenum(IV) aqua ion with sulfur bridges, Mo3OS34+, has been prepared and characterized. An X-ray structure analysis of the iminodiacetato complex prepared from the aqua ion has revealed the core structure of Mo3(μ-O)(μ-S)2(μ3-S).View full abstract -
Shinzo Kano, Tsutomu Yokomatsu, Hajime Nemoto, Shiroshi Shibuya1986 Volume 15 Issue 2 Pages 143-146
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDiastereoselective synthesis of 3,2′-methylene bridged 6-oxygenated 4a,6-cis-4a, 8a-cis-4a-aryldecahydroisoquinoline ring system was achieved by an application of N-acyliminium ion-polyene cyclization at the initial stage.View full abstract -
Masanori Kaya, Akira Kitani, Kazuo Sasaki1986 Volume 15 Issue 2 Pages 147-150
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSEPR measurements have been done with a polyaniline coated platinum electrode at various stages of oxidation. The measurements were carried out in situ conditions in both aqueous and non-aqueous solutions. At the initial stage of anodic oxidation, electron spins accumulate in the polymer film upto 1×1020 spins/gram and then decrease gradually with increasing charge of electrolysis.View full abstract -
Masato Machida, Koichi Eguchi, Hiromichi Arai1986 Volume 15 Issue 2 Pages 151-154
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSEffect of additives on the surface area of oxide supports was investigated to use them for combustion catalysts above 1000 °C. An addition of BaO to Al2O3 was found to suppress the decrease of its surface area at elevated temperatures. The maximum surface area, 6.0 m2/g, was obtained for (BaO)0.14(Al2O3)0.86 after calcination at 1450 °C. The effect of BaO on the surface area of alumina is attributed to the formation of BaO·6Al2O3.View full abstract -
Akira Mori, Tomoyuki Kusaba, Yasutoshi Isayama, Hitoshi Takeshita1986 Volume 15 Issue 2 Pages 155-156
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe first and the second half-wave potentials of p-tropoquinones measured by CV are linear to the Hammett’s Σσp and Σσm, respectively. Their smaller electrostatic repulsion than p-benzoquinones can be attributable to the characteristic three carbonyl system.View full abstract -
Hidenori Kumobayashi, Shigeru Mitsuhashi, Susumu Akutagawa, Sei Ohtsuk ...1986 Volume 15 Issue 2 Pages 157-160
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA Palladium complex-catalyzed elimination reaction of allyl amines was studied to establish a practical process for production of myrcenol. The catalytic elimination occurred smoothly with the cationic Pd(II) complexes. Among a variety phosphorous ligands, the tetramethylene and the pentamethylene diphosphine ligands proved to be the best ligand with respects to the catalytic activity and selectivity.View full abstract -
Toshio Shimizu, Michio Kobayashi1986 Volume 15 Issue 2 Pages 161-164
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFractional recrystallization of diastereomeric 2,4,6-triisopropylpheny1 4′-(l-menthyloxycarbonyl)phenyl selenoxide gave optically pure (−)-selenoxide. Transesterification of this diastereomerically pure (−)-selenoxide with methanol gave enantiomeric (−)-2,4,6-triisopropylphenyl 4-′-(methoxycarbonyl)phenyl selenoxide in 88.1% optical purity.View full abstract -
Teruaki Mukaiyama, Hitoshi Nagaoka, Masahiro Ohshima, Masahiro Murakam ...1986 Volume 15 Issue 2 Pages 165-168
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of a catalytic amount of diphenylboryl hexachloroantimonate(Ph2BSbCl6), acid chlorides or acid anhydrides react smoothly with aromatic compounds such as anisole and veratrole to give the corresponding aromatic ketones in good yields under mild conditions. Diphenylboryl hexachloroantimonate also activates acyl enolates in the Friedel–Crafts acylation reaction to give the aromatic ketones in good yields under almost neutral conditions.View full abstract -
Sigeru Torii, Hideo Tanaka, Takeshi Hamatani, Kazuo Morisaki, Anny Jut ...1986 Volume 15 Issue 2 Pages 169-172
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSElectroreductive carboxylation of aryl halides, β-bromostyrene, and allyl acetates has been performed in an aprotic solvent saturated with carbon dioxide in the presence of a catalytic amount of PdCl2(Ph3P)2 and/or Pd(Ph3P)4.View full abstract -
Genji Iwasaki, Seitaro Saeki, Masatomo Hamana1986 Volume 15 Issue 2 Pages 173-176
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSp-Nitrobenzaldehyde reacts with some active methylene compounds in the presence of a strong base at low temperatures to give p-substituted nitrobenzenes by the two-step course involving the initial formation of the aldol adducts and the subsequent displacement of the carbinol moieties with excess carbanions.View full abstract -
Tadashi Nakajima, Masaru Tanabe, Katsuhiko Ohno, Masahito Segi, Sohei ...1986 Volume 15 Issue 2 Pages 177-180
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of 1-trimethylsilylcyclopropyllithium derivatives with dichloromethyl methyl ether affords the corresponding new cyclopropyl silyl ketones in moderate yield. This reaction involves the intramolecular 1,2-silicon shift from carbon to carbon.View full abstract -
Tadashi Nakajima, Hiroyuki Miyaji, Masahito Segi, Sohei Suga1986 Volume 15 Issue 2 Pages 181-182
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of a series of cyclopropyl trimethylsilyl ketones with acids proceeds under milder conditions compared to that of their carbon analogs to give either the ring opening products, 3-chloropropyl trimethylsilyl ketones, or the ring enlargement products, 2-trimethylsilyl-4,5-dihydrofuran derivatives.View full abstract -
Otohiko Tsuge, Shuji Kanemasa, Hiroyuki Suga1986 Volume 15 Issue 2 Pages 183-186
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCycloaddition of α-(diethylphosphono)acetonitrile oxide, a new phosphorus-functionalized nitrile oxide, leads to 3-phosphonomethyl-Δ2-isoxazolines which are useful as Δ2-isoxazoline unit-introducing reagents.View full abstract -
Takeshi Yura, Nobuharu Iwasawa, Teruaki Mukaiyama1986 Volume 15 Issue 2 Pages 187-190
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn aldol type reaction of divalent tin enolates with aldehydes is successfully achieved by the use of only a catalytic amount of the tin(II) species to afford the cross aldol products in good yields with high stereoselectivity.View full abstract -
Hiroatsu Matsuura, Koichi Fukuhara1986 Volume 15 Issue 2 Pages 191-194
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStructure of the hydrophobic group of Triton X-100 surfactant was studied by a Raman spectroscopic method. The spectral analysis indicated that this group preferentially takes the bent structure with the 1,1,3,3-tetramethylbutyl group in the gauche conformation.View full abstract -
Koh-ichi Seki, Yuko Bando, Kazue Ohkura1986 Volume 15 Issue 2 Pages 195-196
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotolysis of 5-bromo-1,3-dimethyluracil in toluene, xylene and anisole afforded the anormalously substituted 6-aryl-1,3-dimethyluracils beside the expected products 5-aryl-1,3-dimethyluracils, while the reaction with veratrole occurred exclusively at the 5-position of the uracil ring.View full abstract -
Kazuhisa Hiratani, Kazuhiro Taguchi, Hideki Sugihara, Tatsuhiro Okada1986 Volume 15 Issue 2 Pages 197-200
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS3,3-Bis(8-quinolyloxymethyl)oxetane, which has been newly synthesized as a carrier in the cation transport through liquid membranes, exhibits extremely high Li+-selectivity. From the investigation of structural effect, introduction of 8-quinolyl terminal group, oxetane ring, and trimethylene chain to the structure of carrier is suggested to be important for excellent Li+-selectivity.View full abstract -
Hidefumi Hirai, Keiichi Kanaka, Makoto Komiyama1986 Volume 15 Issue 2 Pages 201-204
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA strong charge-transfer band due to the interaction between aluminium copper(I) chloride and 1,3-diphenylpropane is observed in the 360–500 nm region. The band, which is composed of two portions with absorption maxima, respectively, at 422 and 460 nm, is attributed to chelate-type interactions of the two aromatic rings of 1,3-diphenylpropane with aluminium copper(I) chloride.View full abstract -
Yoshihiko Mori, Toshiaki Mori, Naoki Takahashi, Akira Miyamoto, Tadash ...1986 Volume 15 Issue 2 Pages 205-208
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBy using PSRA, the rate constant for the formation of surface carbon species, kCO, and that for its hydrogenation, kCHx were determined from dynamics of adsorbed CO and produced CH4 in the CO hydrogenation on supported Rh catalysts. It was found that there was not much difference between these two rate constants, while kCHx was extremely larger than kCO on the other group VIII metal catalysts.View full abstract -
Akira Sugimori, Hiroshi Itoh1986 Volume 15 Issue 2 Pages 209-212
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe UV-irradiation of 3-pyridinecarboxamide in methanol in the presence of sulfuric acid brings about methoxylation (ionic reaction) at the 2- and 6-position and methylation (radical reaction) at the 4- and 6-position. The effects of quenchers indicate that two methylation products originate from one excited triplet state which is quenched by energy transfer mechanism and that two methoxylation products originate from two different excited singlet states which are quenched by electron transfer mechanism.View full abstract -
Teruaki Mukaiyama, Noritsugu Yamasaki, Rodney W. Stevens, Masahiro Mur ...1986 Volume 15 Issue 2 Pages 213-216
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTin(II) enolates of thioesters are conveniently generated by the addition of stannous thiolates to ketenes. The tin(II) enolates thus formed react with aldehydes to afford the corresponding β-hydroxythioesters in a syn-selective manner. And this method is applied to an enantioselective formation of β-hydroxythioesters by the use of a chiral diamine as ligand.View full abstract -
Hiromichi Ohta, Yasuo Kato, Gen-ichi Tsuchihashi1986 Volume 15 Issue 2 Pages 217-218
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIncubation of methyl arenesulfinylacetates and methyl α-benzenesulphinylpropionate with Corynebacterium equi IFO 3730 afforded the corresponding chiral sulfoxides of high optical purities in moderate to good chemical yields.View full abstract -
Minoru Hara, Noboru Nomura1986 Volume 15 Issue 2 Pages 219-220
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSModified normal pulse polarography was applied to the determination of sodium(I) in flowing solutions. The interferences from dissolved oxygen and hydrogen ions were avoided by measuring the oxidation current of amalgamated sodium which is formed in pulse duration. This method is useful for the determination of metal ions in fluid streams.View full abstract -
Shu Kobayashi, Teruaki Mukaiyama1986 Volume 15 Issue 2 Pages 221-224
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of a catalytic amount of trityl perchlorate, the intermediate adducts, produced in situ by the conjugate addition of silyl enol ethers with α,β-unsaturated ketones, react with aldehydes to give the corresponding γ-acyl substituted δ-hydroxy ketone derivatives stereoselectively in high yields. The ketones thus obtained are easily converted to tetrahydropyran derivatives.View full abstract -
Hideyuki Matsunaga, Toshishige M. Suzuki1986 Volume 15 Issue 2 Pages 225-228
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new extracting reagent, 4-n-dodecyl-6-(2-thiazolylazo)resorcinol, has been synthesized. The extraction characteristics of this reagent have been examined for several heavy metal ions. Cobalt(II), nickel(II), and copper(II) can be extracted into 4-methyl-2-pentanon from strongly alkaline solutions without additional organic reagents such as quarternary ammonium salts.View full abstract -
Mamoru Nango, Yoshiharu Kimura, Shinichi Kanda, Yasuji Ihara, Joichi K ...1986 Volume 15 Issue 2 Pages 229-232
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBovine serum albumin exhibits remarkable acylation efficiency and stereoselectivity in the hydrolysis of optically active amino acid p-nitrophenyl esters. A stereoselective ratio, kD/kL = 66 has been observed with added Triton-x. The hydrolysis rate and stereoselectivity depend on the structure of the substrate and of added surfactants.View full abstract -
Kenji Inagaki, Chikako Ninomiya, Yoshinori Kidani1986 Volume 15 Issue 2 Pages 233-236
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSReaction products of Pt(meso-diamine)2+ involving bulky substituted group with DNA were investigated by using enzymatic digestion technique. Main Pt-adducts were complexes with an intrastrand crosslink between two adjacent guanine bases through N7, N7. Stereoselectivity arised from steric hindrance was observed.View full abstract -
Manabu Igawa, Kiyoyuki Echizenya, Takashi Hayashita, Manabu Seno1986 Volume 15 Issue 2 Pages 237-238
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDesalination was effectively carried out with the cell in which a salt solution was separated from hydrochloric acid with a cation-exchange membrane and from sodium hydroxide solution with an anion-exchange membrane. Donnan dialysis occurred in the cell, cations and anions were exchanged with protons and hydroxide ions, and neutralization and desalination proceeded simultaneously.View full abstract -
Toshio Itahara1986 Volume 15 Issue 2 Pages 239-242
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of uracil derivatives and maleimides in the presence of palladium acetate gave the coupling products.View full abstract -
Kazuhiro Maruyama, Hiroyuki Furuta1986 Volume 15 Issue 2 Pages 243-246
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotosensitized dimerization of 4-methoxyphenol was observed upon irradiation of porphyrin in the presence of quinone. Quantum yield for dimer was depended upon the concentration and reduction potential of quinones used. Free radical coupling mechanism was confirmed by means of ESR and CIDNP techniques.View full abstract -
Noboru Koga, Hiizu Iwamura1986 Volume 15 Issue 2 Pages 247-250
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSKinetic parameters for fluorescence dynamics of the title di(9-triptycyl) ether have been obtained by the transient experiments. The temperature dependence of the rate constants gave the activation energy value of 4.2 kcal mol−1 for the gear-meshing torsional motion in the di(9-triptycyl) ether.View full abstract -
Masamichi Fujihira, Suta Poosittisak1986 Volume 15 Issue 2 Pages 251-252
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe amount of Pt deposited on a glassy carbon (GC) electrode can be controlled precisely by electrochemical reduction of PtCl62− incorporated as a counter ion in the Langmuir–Blodgett (LB) film coated on the electrode surface. Electrocatalysis of the resulting modified electrode for molecular oxygen reduction is also described.View full abstract -
Tadashi Watanabe, Masataka Nakazato, Kenichi Honda1986 Volume 15 Issue 2 Pages 253-256
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe epimerization rate constants and equilibrium compositions for the pheophytin a/a′ pair have been determined for the first time in ten organic solvents. The rate constant varies by five orders-of-magnitude with the nature of solvent. A free energy diagram for the epimer pair is constructed from temperature dependencies of the two parameters in N,N-dimethylformamide.View full abstract -
Hidefumi Hirai, Susumu Hara, Makoto Komiyama1986 Volume 15 Issue 2 Pages 257-260
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSToluene solutions of aluminium silver chloride rapidly absorb ethylene from ethylene–nitrogen (0.94:0.06) mixture at 20 °C under 1 atm. The equilibrium molar ratio of absorbed ethylene to the charged silver chloride is 0.65. In contrast, the solutions show no measurable absorption of carbon monoxide under comparable conditions.View full abstract -
Koji Takeuchi, Takashi Ibusuki1986 Volume 15 Issue 2 Pages 261-264
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe range in which chemiluminescence intensity of the cerium(IV) sulfate-sulfite system changes linearly with sulfite concentration has been expanded more than one order of magnitude (0.2–600 ng SO2 ml−1) by addition of sodium dodecylsulfate (SDS) to sample solutions. In addition, interferences from nitrite and halide ions were greatly reduced. The optimum concentration of SDS was found to be 1 g l−1 which was lower than the critical micelle concentration. The role of SDS was briefly discussed in terms of the interaction between water and the excited molecules.View full abstract -
Kentaro Takagi1986 Volume 15 Issue 2 Pages 265-266
Published: February 05, 1986
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of a nickel(0) complex, 1,2-aminoiodoarenes underwent the reaction with thioureas to provide a facile, site-specific, and general synthetic procedure of 2-benzothiazolamine and its derivatives under non-oxidative conditions.View full abstract
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