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Volume 4, Issue 12
Displaying 1-35 of 35 articles from this issue
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Seishi Yajima, Kiyohito Okamura, Josaburo Hayashi1975 Volume 4 Issue 12 Pages 1209-1212
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe starting material of a continuous silicon carbide fiber with very high tensile strength is a polycarbosilane. It begins to decompose from 300°C in vacuum and is gradually converted into a β-silicon carbide fiber by the heat-treatment at the temperature above 800°C.View full abstract -
Isao Mochida, Yoshimasa Ikeda, Hiroshi Fujitsu, Kenjiro Takeshita1975 Volume 4 Issue 12 Pages 1213-1214
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt was found that propylene was catalytically converted into acetylene and butadiene accompanied with the foramtion of coke at 150°–250° over ion-exchanged zeolites, although the yield and the catalyst life were insufficient. The activity of the ion is found in the order of Ca>Zn>Mn>H>Ni>Ag>Co>Fe>Cu. The catalytic activity may be related with the Lewis acidity.View full abstract -
Tatsuaki Yashima, Osamu Iwase, Nobuyoshi Hara1975 Volume 4 Issue 12 Pages 1215-1218
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt was found that the shape-selective disproportionation of xylene effectively proceeded over the partially exchanged H-mordenite catalyst by the cations with a suitable ionic radius(ca. 0.07nm), and produced 1,2,4-trimethylbenzene in a high selectivity(84%).View full abstract -
Kazuhiro Maruyama, Tatsuaki Iwai, Yoshinori Naruta1975 Volume 4 Issue 12 Pages 1219-1222
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotocycioaddition of 9,10-phenanthraquinone(PQ) and cyclic olefins; cyclohexene(1a), cycloheptene(1b), cis-cyclooctene(1c), and bicyclo[2.2.1]hept-2-ene(2) was investigated. It was found that the product distributions and the modes of photocycloaddition were profoundly dependent on the structure of cyclic olefins.View full abstract -
Hideomi Koinuma, Yasuhiko Yoshida, Hidefumi Hirai1975 Volume 4 Issue 12 Pages 1223-1226
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSChlorocarbonylbis(triphenylphosphine)rhodium was obtained by the reaction of tris(triphenylphosphine)chlororhodium with carbon dioxide and hydrogen. Use of a polar aprotic solvent was effective for the reaction. This reaction indicates carbon dioxide is reduced by molecular hydrogen on a rhodium complex and fixed in the form of a carbonyl complex.View full abstract -
Seishi Yajima, Kiyohito Okamura, Toetsu Shishido1975 Volume 4 Issue 12 Pages 1227-1230
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBy rapid quenching of the melt, an amorphous phase of yttrium-cobalt-boron system was obtained. The phase is stable at room temperature, and its crystallization takes place in the vicinity of 700°C on heating at 10°C/min. Electrical resistivity of the amorphous phase is constant at about 10−3Ωcm in the temperature range below 660°C; the variation in the resistivity with the transition from the amorphous to the equilibrium state was measured.View full abstract -
Shunichi Kawamura, Akeshi Sato, Takeshige Nakabayashi, Masayuki Hamada1975 Volume 4 Issue 12 Pages 1231-1234
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAcetyl benzyl and acetyl benzhydryl disulfides which were labeled with 35S at acetylsulfenyl sulfur, were prepared, and were allowed to react with triphenylphosphine. Radioassay of triphenylphosphine sulfide obtained showed that the benzylsulfenyl sulfur atom of the former, and, on the contrary, acetylsulfenyl sulfur in the latter compound was extruded.View full abstract -
Shigeo Nishimura, Mamoru Katagiri, Yuzo Kunikata1975 Volume 4 Issue 12 Pages 1235-1240
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS2- and 4-Methoxycyclohexanones give the alcohols of higher cis/trans ratios than the corresponding methylcyclohexanones in the catalytic hydrogenation over platinum metals. This trend is most clearly seen over iridium and platinum among the six platinum metals. Hydrogenation with platinum gives the alcohols of higher cis/trans ratios in t-butyl alcohol than in other solvents.View full abstract -
Hiroo Inoue, Hiroyuki Hata, Eiji Imoto1975 Volume 4 Issue 12 Pages 1241-1244
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt is found that α-halo ketones are reduced with benzenethiol in the presence of iron-polyphthalocyanine to the parent ketones, although they are not reduced in the absence of iron-polyphthalocyanine. The iron-polyphthalocyanine appears to serve as an electron-transfer catalyst for the reductive dehalogenation.View full abstract -
Hironori Arakawa, Atsumu Ozaki1975 Volume 4 Issue 12 Pages 1245-1248
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe molybdic anhydride-catalyzed epoxidation of olefin by t-butyl hydroperoxide was studied with particular reference to the induction period and the effect of additives. The epoxidation in the presence of hexamethylphosphorictriamide(HMPT) proceeds through an intermediate complex, MoO(O2)2-HMPT, which was isolated as an adduct with bipyridyl.View full abstract -
Michiro Hayashi, Misako Imachi1975 Volume 4 Issue 12 Pages 1249-1252
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMicrowave spectra of dimethylether and its deuterated species, (CD3)2O, in the excited torsional states were studied in relation to the top–top coupling problem of internal rotation of two methyl groups. A preliminary analysis of the observed splittings of the spectra was carried out in order to evaluate V3, V′ and V″ values in the potential function.View full abstract -
Michio Kobayashi, Tamio Sakai, Hiroshi Minato1975 Volume 4 Issue 12 Pages 1253-1256
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn hexamethylphophoramide, 18O-labelled nitrite ion readily exchanged with the nitro group of p-dinitrobenzene at 30°C, whereas the formation of p-nitrophenol by the O-attack of nitrite ion is much slower. p-Nitrochlorobenzene is quickly converted to p-dinitrobenzene by the N-attack of nitrite ion, and p-nitrophenol is the final product. The nitro group of p-nitrobenzonitrile is slowly exchanged with nitrite ion.View full abstract -
Fred G. Schreiber, Robert Stevenson1975 Volume 4 Issue 12 Pages 1257-1258
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSShort procedures for the synthesis of the lignans (egonol, homo-egonol and the title compound) which are constituents of various Styrax species are reported.View full abstract -
Yoshinao Oosawa, Taro Saito, Yukiyoshi Sasaki1975 Volume 4 Issue 12 Pages 1259-1260
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSeveral bidentate phosphorus ylide ligands of the type Ph2P–(CH2)n–P+(Ph2)–C−H–C(O)–R (n = 1, R = Ph; n = 2, R = CH3, OCH3) and their complexes of palladium(II) and platinum(II) chlorides have been synthesized and characterized.View full abstract -
Tsutomu Nonaka, Akio Udagawa, Keijiro Odo1975 Volume 4 Issue 12 Pages 1261-1266
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe electrolytic reductions of some aromatic diketones were carried out by means of controlled potential electrolysis in various catholytes. Reduction products were intramolecular pinacols (cis and trans cyclic vicinal diols), intermolecular pinacol, and/or hydrol. The formation ratios of the products were strongly dependent on the molecular structure of diketone, the pH of catholyte, and/or the kind of organic co-solvent.View full abstract -
Michiro Hayashi, Jun Nakagawa, Kazunori Kuwada1975 Volume 4 Issue 12 Pages 1267-1270
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMicrowave spectra of gauche-ethanethiol were studied in relation to its molecular structure. The rs structure of this molecule could be determined and was compared with that of trans isomer. Discussions were made on the angles around the carbon atom of the CH2 group in the molecule.View full abstract -
Israel Agranat, Mordecai Rabinovitz, Henry Selig, Chun-Hsu Lin1975 Volume 4 Issue 12 Pages 1271-1272
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhenanthrene reacts with xenon difluoride without HF initiation and in an open system to give fluorine substitution and addition products; 9-fluorophenanthrene is isolated in 33% yield.View full abstract -
Arie Dagan, Guan-Su Shaw, Aviv Gazit, Mordecai Rabinovitz1975 Volume 4 Issue 12 Pages 1273-1276
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTwo geometrical isomers of 4,5:8,9-dibenzo-2,10-cycloundecadien-6-yne were prepared by a Wittig reaction between 2,2′-diformyldiphenylacetylene and trimethylenedi(triphenylphosphonium bromide). Their stereochemical configuration, cis,trans (I) and trans,trans (II) were deduced from the nmr spectral data. Attempts to use (I) and (II) as precursors to the [11]annulenyl cation (III) have so far not been realized.View full abstract -
Michinori Oki, Waro Nakanishi, Michio Fukunaga, G. David Smith, Willia ...1975 Volume 4 Issue 12 Pages 1277-1280
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS2,2-Dimethyl-1-phenylthiiranium hexachloroantimonate was prepared in sulfur dioxide. The direction of ring-opening of the thiiranium ion was found to differ according to the reaction conditions. The structures of the products were determined by independent synthesis and by X-ray crystallography.View full abstract -
Shinichi Tsuji, Shoichi Kusumoto, Tetsuo Shiba1975 Volume 4 Issue 12 Pages 1281-1284
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSEnduracididine (1), a component amino acid of the antibiotic enduracidin, was synthesized starting from L-histidine. Bamberger cleavage of methyl L-histidinate followed by catalytic hydrogenation afforded a mixture of (2S,4R)- and (2S,4S)-2,4,5-triaminopentanoic acid derivatives. Deprotection and guanidination of them yielded 1 of the natural configuration and its diastereoisomer, i.e., the enantiomer of natural alloenduracididine respectively.View full abstract -
Kenshô Sagisawa, Hideko Kiriyama, Ryôiti Kiriyama1975 Volume 4 Issue 12 Pages 1285-1288
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe spin-lattice relaxation times of 1H and 35Cl as well as the 35Cl NQR frequencies in α-NH4HgCl3 are reported. The proton T1 data are explained in terms of C3 reorientation and S4 flip of NH4+ ions. The latter mode is also largely responsible for the 35Cl quadrupole relaxation rate. A marked change in the proton T1 at 55 K indicates a phase transition, ascribable to the ordering of the NH4+ ions.View full abstract -
Takatoshi Narisawa, Mizuka Sano, Yasumasa J. I’haya1975 Volume 4 Issue 12 Pages 1289-1292
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe lowest energy absorption peak was found at 22154.0 cm−1 for a thick single crystal of 9,10-anthraquinone at 4.2 K. From the analysis of Zeeman absorption patterns for the intense, sharp peaks observed at 22319.3 and 22357.9 cm−1, the lowest triplet state was assigned to 3B1g.View full abstract -
Yasushi Inoue, Yoshimune Yamada1975 Volume 4 Issue 12 Pages 1293-1294
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe isotopic exchange rate of sodium ion between crystalline zirconium phosphate and molten NaNO3 has been measured at 312°C and 362°C by batch method. The equilibrium was reached within 20 minutes at either temperature, and the rate was very rapid as compared with that of sodium-potassium ion exchange.View full abstract -
Miki Niwa, Makoto Mizutani, Yuichi Murakami1975 Volume 4 Issue 12 Pages 1295-1298
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOxidation of methanol into formaldehyde on SnO2–MoO3 catalyst proceeds according to the redox mechanism of Mo+5\ ightleftharpoonsMo+4.View full abstract -
Yuki Fujii, Takashi Isago, Mitsuo Sano1975 Volume 4 Issue 12 Pages 1299-1302
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new mixed cobalt(III) complex containing 7,7′-Me-sal2en and L-proline, cis-β-[Co(7,7′-Me-sal2en)(L-pro)], has been prepared from [Co(7,7′-Me-sal2en)] and L-proline in methanol (80%) by air oxidation. The reaction has proceeded stereoselectively to form (−)435-isomer, followed by slow isomerization to form finally (+)435-isomer (100%).View full abstract -
Kimio Kunimori, Tomoji Kawai, Tamotsu Kondow, Takaharu Onishi, Kenzi T ...1975 Volume 4 Issue 12 Pages 1303-1304
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSHigh resolution Auger spectra indicate that NO is dissociatively adsorbed on a polycrystalline tungsten surface at room temperature.View full abstract -
Keiichi Kawano, Yoshimasa Kyogoku1975 Volume 4 Issue 12 Pages 1305-1308
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSNatural abundance 15N nmr spectra of L-histidine, and τ- and π-methylhistidines were measured. The signal assignments to the τ- and π-nitrogen could be made by comparison of these spectra. From the pH titration of the 15N chemical shifts, it is directly proved that the τ-H tautomer is predominant in a basic solution.View full abstract -
Noriyuki Sotani, Masatomo Hasegawa1975 Volume 4 Issue 12 Pages 1309-1312
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe needles appeared at the end of the crystal of molybdenum oxide used as a catalyst for hydrodesulfurization for 10 min at 350°C. They gradually grew and apparently stopped to grow after the 40 min reaction. The needles were produced in the presence of thiophene. They gave the ED pattern due to MoO2. Also the catalyst was sulfurized uniformly all over the surface.View full abstract -
Hajime Matsushita, Masao Noguchi, Sadao Yoshikawa1975 Volume 4 Issue 12 Pages 1313-1316
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe optical activation of racemic α-substituted carbonyl compounds by the hydrolysis of enamines with optically active α-pipecoline was reported. Solvent effect on the optical activation was also examined.View full abstract -
Yoshinobu Inouye, Yuji Uchida, Hiroshi Kakisawa1975 Volume 4 Issue 12 Pages 1317-1318
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt is established that cacalol is 5,6,7,8-tetrahydro-3,4,5-trimethylnaphtho[2,3-b]furan-9-ol by synthesis in several steps from creosol methyl ether.View full abstract -
Jyuzo Nakayama, Mimiko Imura, Masamatsu Hoshino1975 Volume 4 Issue 12 Pages 1319-1320
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new reagent, 2-(3-methylbutoxy)-1,3-benzodithiole, could be used to introduce a cyclic dithioacetal function into 2- or 3-position of indoles and pyrroles in almost quantitative yields under mild conditions.View full abstract -
Shigeo Tazuke, Kaname Sato, Fumio Banba1975 Volume 4 Issue 12 Pages 1321-1324
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFluorescence of various polyesters prepared from 2-(9-anthryl)methylpropane-1,3-diol was quenched by various polyesters prepared from 2-(4-dimethylaminobenzyl)propane-1,3-diol. The sequence of quenching constants(Kq) was discussed with special reference to the polymer structures of fluorescers and quenchers. When terephthalate groups were incorporated in the main chain of quencher, Kq increased very much, which was interpreted by cooperative quenching action of donor(amine) and acceptor(terephthalate). This concept was unequivocally evidenced by separate experiments.View full abstract -
Masao Hashimoto1975 Volume 4 Issue 12 Pages 1325-1329
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe 35Cl NQR frequencies of magnesium trichloroacetate hexahydrate, sodium trichloroacetate trihydrate, and anhydrous sodium trichloroacetate were measured in the temperature region of 77–230 K. It was found that each of the two hydrated salts contains two thermally different non-equivalent trichloromethyl groups. The non-equivalence may be due to some intermolecular interaction.View full abstract -
Akira Arase, Yuzuru Masuda1975 Volume 4 Issue 12 Pages 1331-1332
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAlkylmagnesium halides and alkyllithiums reacted with selenium dioxide, suspended in tetrahydrofuran, to afford dialkyl selenides in 30–62 % yields.View full abstract -
Shuji Teratake, Shun-ichi Morikawa1975 Volume 4 Issue 12 Pages 1333-1336
Published: December 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSReactions of 2-lithio-3-(tri-n-butylstannyl)propionitrile (1) with alkyl halides or carbonyl compounds gave the corresponding 2-substituted 3-(tri-n-butylstannyl)propionitriles (2), which were reduced to amines (4) and then diazotized to give alkyl cyclopropanes or cyclopropanemethanols, respectively, in moderate overall yields.View full abstract
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