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Volume 9, Issue 11
Displaying 1-36 of 36 articles from this issue
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Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru1980 Volume 9 Issue 11 Pages 1335-1338
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotostationary state compositions and quantum yields were determined for triplet sensitized isomerization of 3,3-dimethyl-1-(2-naphthyl)-1-butene in benzene. The ratio of the trans isomer at the photostationary state increased with increasing concentration of oxygen, which, combined with the azulene effect, indicates that both of transoid and twisted triplets are quenched by oxygen.View full abstract -
Tadashi Suehiro, Takaaki Tashiro, Ryuichi Nakausa1980 Volume 9 Issue 11 Pages 1339-1342
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSEsr spectra of phenyl- and p-substituted phenyl-diazenyl radicals in solution give aN1 \backsimeq 23 G, aN2 - 9.4 G, and aH \backsimeq 1.1 G (two meta hydrogens), suggesting a free rotation of the N1=N2 group around the C1–N1 bond. o-Monosubstituted phenyldiazenyl radicals prefer to take a planar conformation, and show a hyperfine coupling constant of only one meta hydrogen-5.View full abstract -
Satoru Onaka, Yoshinori Kondo, Nobuhiro Furuichi, Koshio Toriumi1980 Volume 9 Issue 11 Pages 1343-1346
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotochemical reactions of the title compounds afforded an air-stable colorless crystalline compound in low yield. The product was characterized as an orthometalated manganese triphenylphosphite derivative by elemental analyses and an X-ray diffraction technique. Its crystal structure is described.View full abstract -
Toyoki Kunitake, Naotoshi Nakashima, Kozo Morimitsu1980 Volume 9 Issue 11 Pages 1347-1350
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSChiral, single-chain ammonium amphiphiles which possess the alanine unit formed disk-shaped bilayer aggregates in water. Circular dichroism of the chiral aggregate was much enhanced at temperatures below the phase transition.View full abstract -
Hisatoshi Konishi, Yuji Kasamatsu, Satoru Nanjo, Tamon Okano, Jitsuo K ...1980 Volume 9 Issue 11 Pages 1351-1354
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSNitrobenzene was deoxygenated by carbon to give azobenzene. Impregnation of K2CO3 on the carbon markedly lowered the temperature required for the reaction. The catalytic activity of K2CO3 was correlated to the oxidation behavior of the carbon observed by TGA and DTA in air.View full abstract -
Noboru Yamazaki, Seiichi Nakahama, Kazuo Yamaguchi, Tetsuhiko Yamaguch ...1980 Volume 9 Issue 11 Pages 1355-1358
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSulfur dichloride was allowed to react with linear and cyclic, silyl and tin sulfides prepared from alkanedithiols. Of the sulfides, bis(trimethylsilyl) sulfides were most effective for synthesis of cyclic trisulfides.View full abstract -
Yonezo Maeda, Hiroki Ohshio, Yoshimasa Takashima1980 Volume 9 Issue 11 Pages 1359-1362
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe 57Fe Mössbauer emission spectroscopic technique has been applied to the study of after-effects of electron capture in [57Co(terpy)2]Cl2·5H2O and [57Co(terpy)2] (ClO4)2·2H2O (where terpy= 2,2′,2″-tripyridyl) which exhibit an anomalous magnetic behavior. These results were interpreted on the basis of the difference in the spin multiplicity of the central cobalt ion.View full abstract -
Hitomi Suzuki, Hisako Abe, Atsuhiro Osuka1980 Volume 9 Issue 11 Pages 1363-1364
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn hexamethylphosphoric triamide containing copper (I) iodide, nonactivated aryl iodides undergo a facile nucleophilic attack by arenethiolate ions to give the corresponding aryl sulfides in good yields.View full abstract -
Noboru Ono, Hideyoshi Miyake, Yo Tanabe, Kazuhiko Tanaka, Aritsune Kaj ...1980 Volume 9 Issue 11 Pages 1365-1368
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAllylation sulfur substituted active methylene compounds such as RSCH2Y [Y = C(=O)R, COOR, CN] with allylic bromides in the presence of bases gives a mixture of the SN2-product and the apparent SN2′-product. The former product is selectively obtained in alkylation in a nonpolar solvent. Synthetic utility of this regiospecific allylation is demonstrated in the simple synthesis of pellitorine.View full abstract -
Otohiko Tsuge, Hidehiko Shiraishi, Toshiaki Takata1980 Volume 9 Issue 11 Pages 1369-1372
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS1,3-Diphenylthiazolo[3,4-a]benzimidazole, a new 10π-electron heterocycle containing tetravalent sulfur, was prepared by the reaction of 1,2-dibenzoylbenzimidazole with phosphorus pentasulfide in refluxing toluene. Its cycloadditions with alkenes and alkynes occurred across the thiocarbonyl ylide dipole in highly stereoselective and/or regiospecific fashions.View full abstract -
Masaru Inage, Haruyuki Chaki, Shoichi Kusumoto, Tetsuo Shiba, Akira Ta ...1980 Volume 9 Issue 11 Pages 1373-1376
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSynthesis is described on 6-O-[2-deoxy-2-((R)-3-hydroxytetradecanoylamino)-6-O-tetradecanoyl-β-D-glucopyranosyl]-2-deoxy-2-((R)-3-hydroxytetradecanoylamino)-3,4-di-O-tetradecanoyl-D-glucopyranose which corresponds to the phosphate-less lipid A structure of Salmonella-type bacterial endotoxin.View full abstract -
Noboru Yoshida, Masatoshi Fujimoto1980 Volume 9 Issue 11 Pages 1377-1380
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSInclusion reactions of the title compounds with α-cyclodextrin were studied in aqueous solution by means of a temperature-jump method. The rate constants for inclusion reactions were found to be in the order of magnitude 106–107 mol−1 dm3 s−1.View full abstract -
Mitsuo Sato, Toshihiko Ogura1980 Volume 9 Issue 11 Pages 1381-1384
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new concept of coordination network is introduced for classifying and deriving possible frameworks of tectosilicates. 26 topologically different networks have been derived by connecting points with the degree of freedom 3 in the 2nd distance. 39 different tectosilicate structures are examined in view of this coordination network.View full abstract -
Yuzo Yoshikawa1980 Volume 9 Issue 11 Pages 1385-1388
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe conformational analysis was performed for the systems of the ion pairs, Λ-[Co(en)3]3+–ClO4−–, – SO42−– , –PO43−–, and -tart2−- nH2O. The analysis of the Λ-[Co(en)3]3+ - tart2− - 25H2O systems gave the results consistent with the experimental data of the stereoselective ion associations, in which the approximation of a dielectric constant dependent on inter-charge distance was made. The structures of Λ-[Co(en)3]3+ -tart2− suggest that two hydroxyl groups of a tartrate ion play an important role.View full abstract -
Kyosuke Satake, Masaru Kimura, Shiro Morosawa1980 Volume 9 Issue 11 Pages 1389-1390
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS6,7-Dihydroazirino[1 ,2-a]thieno[2,3-d]pyridin-8-one 7 was synthesized and its base-catalyzed ring-opening leading to 4,5-dihydro-8H-thieno[3,2-c]azepin-8-one 8 was studied.View full abstract -
Hiroshi Kasai, Ziro Yamaizumi, Keiji Wakabayashi, Minako Nagao, Takash ...1980 Volume 9 Issue 11 Pages 1391-1394
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStructure of a mutagenic compound (Me-IQ) isolated from broiled fish was determined to be 2-amino-3,4-dimethylimidazo[4,5-f]quinoline based on the mass-, UV- and 1H-NMR-spectra and chemical synthesis. Me-IQ showed strong mutagenic activity towards Salmonella typhimurium TA98 in the presence of S-9 mix.View full abstract -
Ken’ichi Takeuchi, Takamasa Moriyama, Tomomi Kinoshita, Hitoshi ...1980 Volume 9 Issue 11 Pages 1395-1398
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS1-Adamantyl trifluoromethanesulfonate (1) has been prepared from 1-bromoadamantane and silver trifluoromethanesulfonate in 2,2-dimethylbutane. The trifluoromethanesulfonate (1) abstracts hydride from pentane or hexane to form adamantane, initiates ring-opening polymerization of tetrahydrofuran, and reacts with alkyllithiums to afford 1-alkyladamantanes.View full abstract -
Keiji Iriyama, Fumio Mizutani, Masahiko Yoshiura1980 Volume 9 Issue 11 Pages 1399-1402
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSRemarkable absorption spectral change and enhancement of photocurrent due to chromophore aggregation have been achieved by treating a cast film of a new surface-active and photo-active merocyanine dye on an optically transparent SnO2 electrode with an alkaline aqueous solution.View full abstract -
Toru Koizumi, Hiroyasu Takagi, Eiichi Yoshii1980 Volume 9 Issue 11 Pages 1403-1406
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDiastereomerically pure ethyl N-[chloro(phenyl)thiophosphonyl]-L-prolinate was prepared. From this intermediate various optically active phenylphosphonic acid derivatives have been obtained in high optical yields. Their absolute configurations have been determined by the chemical correlation.View full abstract -
Yoshinobu Inouye, Junko Hara, Hiroshi Kakisawa1980 Volume 9 Issue 11 Pages 1407-1410
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFour N-alkyl-α-alkoxycarbonylnitrones were prepared and their NMR spectra in C6D6, CDCl3, or CD3SOCD3 were measured. From the analyses of the spectra, it was found that the nitrones exhibited a facile equilibrium in all solvents used and E/Z ratio in equilibrium depended largely on the polarity of the solvent.View full abstract -
Sotaro Ito, Toshimasa Yamamoto, Yuji Tokushige1980 Volume 9 Issue 11 Pages 1411-1414
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe copper(II) chloride-catalyzed oxidation of L-ascorbic acid (AA) by O2 was found to involve both the anaerobic oxidation of AA by copper(II) chloride and the reoxidatian steps of copper(I) chloride by O2 in the catalytic cycle, by comparing the rate of copper(II)-catalyzed oxidation of AA by O2 (RAIIO) with those of anaerobic oxidation of AA by copper(II) (RAII) and oxidation of copper(I) by O2 (RIO).View full abstract -
Koichi Narasaka, Hong Chang Pai1980 Volume 9 Issue 11 Pages 1415-1418
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMeso(or erythro) 1,3-diols are prepared in high stereoselectivity from β-hydroxyketones by the treatment with tributylborane and the successive reduction with sodium borohydride.View full abstract -
Hiroshi Takaku, Tadaaki Nomoto, Mitsuho Murata, Tsujiaki Hata1980 Volume 9 Issue 11 Pages 1419-1422
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of cesium fluoride, the reactions of a fully protected 5′-O-dimethoxytrityl-2′-O-tetrahydropyranyl-N-acylnucleoside 3′-(4-chlorophenyl, 5-chloro-8-quinolyl) phosphates with 5′-hydroxyl nucleosides proceeded rapidly under mild conditions to afford the corresponding ribodinucleoside monophosphates in good yields.View full abstract -
Hisatoshi Konishi, Kiyoshi Yokota, Yuji Ichihashi, Tamon Okano, Jitsuo ...1980 Volume 9 Issue 11 Pages 1423-1426
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSChlorination of alkylbenzenes was carried out with chlorine in carbon tetrachloride in the presence of chemically-modified silica catalysts. The para/ortho ratios were remarkably higher than those obtained in the FeCl3-catalyzed chlorination. t-Butylbenzene was chlorinated at para-position almost exclusively. The catalyst could be reused several times.View full abstract -
Yoshikazu Sugihara, Yoshiko Fujiyama, Ichiro Murata1980 Volume 9 Issue 11 Pages 1427-1430
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSome fulvalenoids containing 1,3-dithiepin counterpart (5a), (5b), and (5c) have been synthesized through the reaction of 2-trimethylsilyl-1,3-dithiepinide ion (6) with di-tert-butyl-cyclopropenone, 2,3;6,7-dibenzotropone, and fluorenone, respectively. Comparison of the 1H-NMR spectra of these fulvalenes indicated the electron accepting ability of the 1,3-dithiepin moiety.View full abstract -
Toshio Eiki, Mikio Mori, Shuji Kawada, Kazumi Matsushima, Waichiro Tag ...1980 Volume 9 Issue 11 Pages 1431-1434
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSN-Dodecyl-2-hydroxymethylimidazole (1) was found to be unusually active in the transesterification toward p-nitrophenyl picolinate (4), when the reaction was carried out in the presence of CTABr micelle and zinc ion.View full abstract -
Isao Aso, Taro Amamoto, Noboru Yamazoe, Tetsuro Seiyama1980 Volume 9 Issue 11 Pages 1435-1438
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn an attempt to determine oxygen adsorption sites of the Fe2O3–Sb2O4 catalysts, SIMS measurements of the catalysts were performed after 18O2 preadsorption (SIMS-18O tracer method). It was clearly shown that the adsorbed oxygen was accommodated by the surface Sb ions.View full abstract -
Hironobu Hashimoto, Katsuji Asano, Fumiko Fujii, Juji Yoshimura1980 Volume 9 Issue 11 Pages 1439-1440
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe structure of 6-aminoheptonic acid component contained in destomycin A and C was confirmed first by chemical synthesis.View full abstract -
Toshikazu Takata, Mayumi Yamazaki, Ken Fujimori, Yong Hae Kim, Shigeru ...1980 Volume 9 Issue 11 Pages 1441-1444
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAsymmetric induction and diastereomeric ratio in the enzymatic oxygenation of various sulfides to the corresponding sulfoxides with hepatic mirosomal cytochrome P-450 obtained from phenobarbital pretreated rabbit were investigated in comparison with those of nonenzymatic oxidation with m-chloroperbenzoic acid and sodium metaperiodate. While substantial asymmetric inductions were observed in the sulfoxides formed by the enzymattc oxygenations, diastereomeric ratios of the sutfoxides formed were also quite different from those obtained by oxidation with m-chloroperbenzoic acid and sodium metaperiodate.View full abstract -
SELECTIVE PERMEATION OF CARBON DIOXIDE THROUGH CELLULOSE NITRATE/POLYETHYLENE GLYCOL BLEND MEMBRANESMitsuyasu Kawakami, Hideaki Iwanaga, Shuichi Kagawa1980 Volume 9 Issue 11 Pages 1445-1448
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPermeabilities for N2, O2, and CO2 through cellulose nitrate/polyethylene glycol blend membranes were determined as a function of film composition. Not only the permeability but the permselectivity for CO2 increased with an increase in the fraction of polyethylene glycol. It was suggested that the intermolecular force induced by polar groups in the film and the role of polyethylene glycol as a plasticizer may be responsible for such a behavior for CO2.View full abstract -
Shuji Oishi, Isao Tate1980 Volume 9 Issue 11 Pages 1449-1452
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSRNd(WO4)2(R=Li,Na and K) crystals were grown from high-temperature solutions of ternary systems Nd2O3–WO3–R2CO3 by slow cooling. Grown RNd· (WO4)2(R=Li and K) crystals were generally bigger than NaNd(WO4)2 crystals. These crystals, whose shapes were octahedron or decahedron, were reddish purple and mostly transparent. Among these tungstate crystals, NaNd(WO4)2 crystals had the highest melting point of 1235±5°C.View full abstract -
Hiroshi Nozaki, Yoshie Fukuoka, Akihiko Matsuo, Osamu Soga, Mitsuru Na ...1980 Volume 9 Issue 11 Pages 1453-1454
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new dehydro-γ-lactam, sargassumlactam, has been isolated from the brown alga Sargassum kjellmanianum, and its structure was determined to be 4,5-dehydro-3-methoxy-3,5-dimethoxycarbonyl-2-pyrrolidone by the spectroscopic and X-ray diffraction analysis.View full abstract -
Nobukatsu Katsui, Fujio Yagihashi, Akio Murai, Tadashi Masamune1980 Volume 9 Issue 11 Pages 1455-1458
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStructure and configuration of rishitinone, a stress metabolite isolated from diseased potato tubers, was determined to be formula 1 on the basis of the chemical and spectral evidence.View full abstract -
Mitsuo Takasugi, Yoshikazu Kumagai, Shigemitsu Nagao, Tadashi Masamune ...1980 Volume 9 Issue 11 Pages 1459-1460
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTwo antifungal compounds, designated as broussin and broussonin C, were isolated from wounded xylem tissues of paper mulberry shoots and identified as flavan and 1,3-diphenylpropane derivatives, respectively.View full abstract -
Reiji Takeda, Yoshimoto Ohta, Yoshio Hirose1980 Volume 9 Issue 11 Pages 1461-1464
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTwo new sesquiterpene lactones, named (+)-β-frullanolide and (+)-brothenolide, were isolated from liverwort Frullania brothevi Steph.
The absolute structures of these lactones have been established.View full abstract -
Kiyohiko Tajima, Hiroshi Itoh, Hitoshi Morooka1980 Volume 9 Issue 11 Pages 1465-1466
Published: November 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTriacetate of D-glucuronolactone (1) or D-mannuronolactone (2) is converted to 3-acetoxy-6-diacetoxymethylpyrane-2-one (3) and 2,5, 6 6-tetraacetoxy-2,4-hexadienoic acid (4) respectively by treatment with acetic anhydride-potassium acetate-18-crown-6 or acetic anhydridetriethylamine.View full abstract
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