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Volume 4, Issue 9
Displaying 1-26 of 26 articles from this issue
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Yusei Maruyama, Kyoko Machida, Noriko Iwasaki, Satoshi Iwashima1975 Volume 4 Issue 9 Pages 911-914
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn annealing effect in the absorption spectrum of an amorphous naphthacene film was investigated. The remarkable effect observed may be explained by assuming the change of the range of order in molecular arrangements. The fluorescence life times of some amorphous organic films were also measured comparing with those of crystalline films. The differences between them were discussed in terms of the localization character of electronic states in the amorphous film.View full abstract -
Masamitsu Shirai, Taizo Koizumi, Yoshio Iguchi, Makoto Tanaka1975 Volume 4 Issue 9 Pages 915-918
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAutoxidations of hydroquinone and its derivatives are catalyzed by pyridinium salts positively or negatively depending on the properties of the substituents of the pyridinium rings. Formation of charge–transfer complexes between hydroquinones and pyridinium salts plays an important role.View full abstract -
Akikazu Kakehi, Suketaka Ito, Takahisa Funahashi, Norio Ogasawara1975 Volume 4 Issue 9 Pages 919-922
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reactions of 1-alkylpyridinium salts carrying a 2- or 4-methyl group with activated β-ethoxymethylene compounds in the presence of alkali gave the corresponding 2- or 4-allylidenedihydropyridine derivatives in good yields.View full abstract -
Shosuke Yamamura, J. A. Lamberton, Hajime Irikawa, Yasuaki Okumura, Yo ...1975 Volume 4 Issue 9 Pages 923-926
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFive new alkaloids have been isolated from the plant Daphniphyllum gracile Gage, and their structures also been elucidated on the basis of their spectral and chemical evidences. Particularly, daphnigraciline methiodide (VI) was directly converted into yuzurine methiodide (VII). Furthermore, application of 13C NMR spectra plays an important role in the structural elucidation.View full abstract -
Tomihisa Kambara, Junsuke Suzuki, Hiroe Yoshioka, Toshio Nakamura1975 Volume 4 Issue 9 Pages 927-930
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSRedox substoichiometry in the isotope dilution analysis of antimony was studied. As the substoichiometric reaction the oxidation of trivalent antimony to pentavalent with potassium permanganate was used, followed by the BPHA extraction of trivalent antimony. The redox substoichiometry was applied to the determination of antimony content in 124Sb obtained from JAERI. The content determined was 0.481±0.02 μg, which agreed with the certified value.View full abstract -
Seishi Yajima, Josaburo Hayashi, Mamoru Omori1975 Volume 4 Issue 9 Pages 931-934
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSContinuous silicon carbide fiber of high-tensile strength (about 350 Kg/mm2) was synthesized by means of the heat-treatment of organosilicon polymer obtained from dodecamethylcyclohexasilane. X-ray analysis and high voltage electron microscopic observations revealed that the obtained continuous fiber is an ultrafine grain structure of β-silicon carbide.View full abstract -
Yuzo Saeki, Akemi Kato, Ryoko Matsuzaki1975 Volume 4 Issue 9 Pages 935-938
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction process between Na2WO4 and chlorine can be represented as follows: Na2WO4 \xrightarrowabout140°C Na2W2O7 \xrightarrowabout350°C Na2W4O13 \xrightarrowabout480°CWO3. The WO3 The reacts with chlorine above about 700°C to form volatile WO2Cl2. WOCl4 obtained together with WO2Cl2 above 800°C is probably formed by the reaction between WO3 and NaCl.View full abstract -
G. Bennett1975 Volume 4 Issue 9 Pages 939-942
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSVarious 3,4,4-trisubstituted-2-buten-4-olides were prepared by the condensation of 2-alkyn-1,4-diols with triethyl orthoacetate in the presence of a catalytic amount of pivalic acid.View full abstract -
Shun-ichi Meguro, Tsutomu Mizoroki, Atsumu Ozaki1975 Volume 4 Issue 9 Pages 943-946
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSα-Methyl-cinnamaldehyde, cinnamaldehyde, and croton aldehyde are hydrogenated to the corresponding unsaturated alcohols with a fairly high selectivity by use of RhCl3·3H2O or Rh2(CO)4Cl2 catalyst in tertiary amine-benzene solution under an oxo-reaction condition. A catalytic amount of triphenylphosphine to this catalyst system substantially retards the hydrogenation of –CHO giving saturated aldehyde.View full abstract -
Kenryo Namba, Shuichi Suzuki1975 Volume 4 Issue 9 Pages 947-950
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA photochromic α-amylase was prepared by chemical modification with a spiropyran compound and isolated with DEAE-Sephadex chromatography. The modified α-amylase showed the reverse photochromism in water. UV- or VS-light irradiation caused a decrease in enzyme activity of the modified enzyme. The initial activity could be recovered when the modified enzyme irradiated was kept in the dark.View full abstract -
Kentaro Takagi, Tadashi Okamoto, Yasumasa Sakakibara, Atsuyoshi Ohno, ...1975 Volume 4 Issue 9 Pages 951-954
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSConvenient syntheses of various ketones from acyl halides and organomercury(II) compounds have been achieved by the aid of catalytic amounts of tetrakis(triphenylphosphine)palladium in hexamethylphosphoric triamide. Plausible reaction path is proposed.View full abstract -
Hiromichi Kono, Naofumi Wakao, Yoichiro Nagai1975 Volume 4 Issue 9 Pages 955-956
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS[RuX2(PPh3)3] (X = Cl or Br) and [RhCl(PPh3)3] were reduced with silicon hydrides in the presence of triethylamine in benzene to give [RuHX(PPh3)3·C6H6] and [RhH(PPh3)4] in high yields.View full abstract -
Naotake Takaishi, Yoshiaki Fujikura, Yoshiaki Inamoto, Hiroshi Ikeda1975 Volume 4 Issue 9 Pages 957-960
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDecomposition of 1-(tricyclo[5.3.1.03,8]undec-3-yl)-2-diazoethan-1-one (IV) in toluene gave predominantly tetracyclo[7.3.1.02,5.05,10]tridecan-4-one (V) under silver oxide catalysis, while tetracyclo-[5.4.1.11,9.05,13]tridecan-11-one (VI) was the major reaction product in the presence of cupric sulfate.View full abstract -
Ken-ichi Yoshikawa, Isao Morishima, Jun-ichi Kunitomo, Motoharu Ju-Ich ...1975 Volume 4 Issue 9 Pages 961-964
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCarbon-13 NMR spectra of quaternary protoberberine alkaloids were measured and their preferential conformation was concluded by comparison of the chemical shift.View full abstract -
Hiroko Sato, Takenori Kusumi, Kiyoto Imaye, Hiroshi Kakisawa1975 Volume 4 Issue 9 Pages 965-966
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS1,3-Dipolar addition of the nitronic ester 1 to methyl acrylate and methyl crotonate afforded the corresponding adducts, 2 and 6, respectively. These were converted to the 4-amino-2-hydroxybutyric acids, 5 and 8.View full abstract -
Shigeru Yamashita1975 Volume 4 Issue 9 Pages 967-970
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe photolysis of vinyl iodide has been studied using UV light beam of high intensity and a collision-free photochemical reactor incorporated in the ion-source of mass spectrometer. The primary process C2H3I + hν → C2H3 + I was found predominant and the process C2H3I + hν → C2H2 + HI minor, and the mass spectrum of vinyl radical was obtained.View full abstract -
Masao Sakurai, Toshio Nakajima, Tsuyoshi Komatsu, Tsurutaro Nakagawa1975 Volume 4 Issue 9 Pages 971-976
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSApparent molal adiabatic compressibilities of sodium chloride were measured in water at 5, 25, and 45°C. The Debye–Hückel limiting slopes were estimated experimentally. A convenient equation for the conversion of adiabatic to isothermal compressibilities was derived. The results indicate that the limiting slope for isothermal compressibility is larger by about 10% than that for adiabatic compressibility.View full abstract -
Tsujiaki Hata, Isamu Yamamoto, Mitsuo Sekine1975 Volume 4 Issue 9 Pages 977-980
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAzido group was introduced selectively to 5′-position of nucleosides by one-step reaction using carbon tetrabromide, triphenylphosphine, and lithium azide.View full abstract -
Kiyoshi Iwai, Hiroshi Kosugi, Hisashi Uda1975 Volume 4 Issue 9 Pages 981-982
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSα-Phenylsulfinyl-Δα,β-butenolide reacts more effectively with the enolates of cyclopentanone, 2-ethoxycarbonylcyclohexanone, and ethyl n-valerate than the phenylthio analog to give the Michael addition products, which, except the cyclopentanone derivative, are transformed into the corresponding β-substituted Δα,β-butenolides.View full abstract -
Atsuyoshi Ohno, Kaoru Nakamura, Misao Uohama, Shinzaburo Oka1975 Volume 4 Issue 9 Pages 983-984
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSeveral nucleophilic and electrophilic reactions of di-t-butyl thioketone are reported.View full abstract -
Iwao Ojima, Tetsuo Kogure, Yoichiro Nagai1975 Volume 4 Issue 9 Pages 985-988
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSelective asymmetric reductions of carbonyl functionalities in α,β-unsaturated carbonyl compounds, such as β-ionone, 2-methylcyclohexenone and mesityl oxide, were successfully carried out using dihydrosilane-chiral rhodium(I) complex catalyst combinations.View full abstract -
Kazuhiko Saigo, Masaaki Osaki, Teruaki Mukaiyama1975 Volume 4 Issue 9 Pages 989-990
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of TiCl4, ketene alkyl trialkylsilyl acetals, prepared from α-lithio esters and a trialkylsilyl halide, react with aldehydes and ketones at −78°C to afford the corresponding β-hydroxyesters and β-trialkylsiloxyesters in good yields.View full abstract -
Hiroshi Minato, Kei Yamaguchi, Michio Kobayashi1975 Volume 4 Issue 9 Pages 991-994
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn alkoxyaminosulfonium ion is prepared from N-tetramethylene-p-toluenesulfinamide and methyl trifluoromethanesulfonate. Its NMR spectrum shows that its two α hydrogens of the pyrrolidine ring are magnetically non-equivalent, and this alkoxyaminosulfonium ion is not planar but pyramidal. It reacts with methyl sulfide, forming the original sulfinamide and trimethylsulfonium ion.View full abstract -
Yoahihisa Watanabe, Sang Chul Shim, Take-aki Mitsudo, Masakazu Yamashi ...1975 Volume 4 Issue 9 Pages 995-996
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSGlutaraldehyde reacts with primary amines in the presence of tetracarbonylhydridoferrate to give the corresponding N-substituted piperidines.View full abstract -
Yukio Takahashi, Nobu Tomita, Norihiko Yoneda, Akira Suzuki1975 Volume 4 Issue 9 Pages 997-1000
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAlcohols with short carbon chains, one to four, which are not carboxylated under the usual Koch conditions, were carboxylated with carbon monoxide in the presence of HF–SbF5 as a catalyst. This was carried out at temperatures from −20 to 30°C under atmospheric pressure. Except for methanol, such alcohols were found to react readily with carbon monoxide to give corresponding carboxylic acids in high yields.View full abstract -
Atsuyoshi Saito, Sadayuki Himeno1975 Volume 4 Issue 9 Pages 1001-1004
Published: September 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPolarographic reduction of nitrate took place in the ascending branch of an Fe(II) reduction wave in an unbuffered solution (pH 4–6) of a supporting electrolyte that contained iodate. In the potential region of reducing nitrate, the current varied periodically of which the period depended on the experimental condition.View full abstract
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