-
Masayoshi Onishi, Katsuma Hiraki, Masahiko Matsuda, Tetsuo Fukunaga
1983 Volume 12 Issue 3 Pages
261-264
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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Pyrex-filtered irradiation of a thermally inert complex [CoH[PPh(OMe)
2]
4] dissociated PPh(OMe)
2 from cobalt without cleavage of a hydrido–cobalt bond, yielding an active species “CoH[PPh(OMe)
2]
3”. The photogenerated species caused double-bond migration of 3-phenylpropene to (
E)- and (
Z)-1-phenylpropenes.
View full abstract
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Seiji Takasaki, Kaoru Takahashi, Hideo Suzuki, Yuzuru Sato, Akifumi Ue ...
1983 Volume 12 Issue 3 Pages
265-268
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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The rate of propene hydrogenation on Co/TiO
2 catalyst, prepared by an alkoxide technique,was significantly enhanced when the catalyst was reduced by hydrogen at 700°C. However, over the catalyst prepared by an usual impregnation method, the enhancement of the rate was not observed at any reduction temperatures. The effects of reduction temperatures on the rate of propene hydrogenation were elucidated by redispersion of metallic cobalt particles.
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Yoshikuni Taniguchi, Hiroshi Yoneyama, Hideo Tamura
1983 Volume 12 Issue 3 Pages
269-272
Published: March 05, 1983
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Illumination of n-type Si powder photocatalysts whose anodic surfaces and cathodic surfaces were coated with polypyrrole and platinized Ag, respectively, caused hydrogen evolution from aqueous ethanol for longer than 150 h with a quantum efficiency of 2.1 % at 550 nm.
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Yoshio Iida, Shigeki Daishima
1983 Volume 12 Issue 3 Pages
273-276
Published: March 05, 1983
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Negative ion chemical ionization mass spectra were evaluated for 21 polycyclic aromatic hydrocarbons. The spectra exhibited some peculiar peaks corresponding to (M-H)
−, M
\
ewdot and MH
−. These ions were found to be useful to identify and detect such polycyclic aromatic hydrocarbons and also to distinguish the isomers.
View full abstract
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Gong-Wei Wang, Hideshi Hattori, Kozo Tanabe
1983 Volume 12 Issue 3 Pages
277-280
Published: March 05, 1983
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The addition of about 3 wt% of sulfate ion to SnO
2 caused the enhancement in the acid strength from H
0=+3.3 to −8.2. The catalytic activity of SnO
2+SO
42− for the isomerization of cyclopropane at 100°C was found to be higher than 100 times that of simple SnO
2 for the same reaction at 300°C. The effect of sulfate ion was remarkable also for the dehydration of 2-butanol.
View full abstract
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Haruhisa Shirahama, Gurdial S. Arora, Takeshi Matsumoto
1983 Volume 12 Issue 3 Pages
281-282
Published: March 05, 1983
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(
Z,
E,
E)-Humulene was prepared from (
E,
E)-6,7-epoxyhumula-2,9-dien-12-ol which was obtained from (
E,
E,
E)-humulene 6,7-epoxide by oxidation with SeO
2-
t-BuOOH.
View full abstract
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Masaaki Yamada, Toshiyuki Hobo, Shigetaka Suzuki
1983 Volume 12 Issue 3 Pages
283-284
Published: March 05, 1983
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Sonoluminescence, ultrasonically induced luminescence, is described for the determination of water in methanol. It is based on the measurement of emissions from OH
*, H
2O
*, etc. produced when ultrasonic waves is propagated through methanol containing water. The method is unique in capable of determining water with no use of reagents.
View full abstract
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Shoji Hara, Hidetaka Dojo, Akira Suzuki
1983 Volume 12 Issue 3 Pages
285-286
Published: March 05, 1983
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Trialkyl(1-alkynyl)borates readily available from trialkylboranes and lithium acetylides react with orthoesters in the presence of titanium tetrachloride, followed by the oxidation with hydrogen peroxide and sodium hydroxide to give the corresponding α,β-unsaturated carbonyl compounds.
View full abstract
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Nobuhito Imanaka, Gin-ya Adachi, Jiro Shiokawa
1983 Volume 12 Issue 3 Pages
287-288
Published: March 05, 1983
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Sodium sulfate doped with both sodium vanadate and praseodymium sulfate has been investigated as solid electrolyte for SO
2 detecting device. Na
2SO
4–NaVO
3–Pr
2(SO
4)
3(91.1:3.9:5.0) shows higher electric conductivity than pure Na
2SO
4. The measured EMF for an SO
2 concentration cell using this electrolyte is in good accord with the calculated one. NaVO
3 stabilizes a high temperature phase, Na
2SO
4–I.
View full abstract
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Nobuo Tsuda, Sumio Yokota, Takashi Kudo, Oyo Mitsunobu
1983 Volume 12 Issue 3 Pages
289-292
Published: March 05, 1983
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The reaction of methyl 2,3-anhydro-4,6-
O-benzylidene-α-
D-allopyranoside (
l) with ethylmagnesium bromode in the presence of CuI afforded 4,6-
O-benzylidene-1,2-dideoxy-
D-
rlbo-hex-1-enopyranoside (
2), Similarly, methyl 2,3-anhydro-4,6-
O-benzylidene-α-
D-gulopyranoside (
6) gave 4,6-
O-benzylidene-1,2-dideoxy-
D-
xylo-hex-1-enopyranoside (
7).
View full abstract
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Teruaki Mukaiyama, Junji Ichikawa, Masatoshi Asami
1983 Volume 12 Issue 3 Pages
293-296
Published: March 05, 1983
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Acylation of alcohols and amides was effected under mild conditions by the use of 1,1′-dimethylstannocene and acyl chlorides, giving the corresponding esters and imides in good to excellent yields.
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Nobuharu Iwasawa, Teruaki Mukaiyama
1983 Volume 12 Issue 3 Pages
297-298
Published: March 05, 1983
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A highly enantioselective aldol-type reaction forming various β-hydroxy carbonyl compounds from 3-acetylthiazolidine-2-thione and achiral aldehydes is achieved via divalent tin enolate employing chiral diamine derived from (
S)-proline as a ligand.
View full abstract
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Kazuya Kurata, Teruaki Suzuki, Minoru Suzuki, Etsuro Kurosawa, Akio Fu ...
1983 Volume 12 Issue 3 Pages
299-300
Published: March 05, 1983
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Laurencial, a novel sesquiterpene which possesses spiro[4.5]decane skeleton with α,β-unsaturated aldehyde moiety, has been isolated from the title alga and its structure was determined by X-ray crystallographic analysis.
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Ken-ich Aika, Harutaka Sekiya, Atsumu Ozaki
1983 Volume 12 Issue 3 Pages
301-304
Published: March 05, 1983
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The reaction of HCHO over group VIII metals was studied. The main products obtained with powder catalysts were CO and CH
3OH, while CH
4 was formed at higher temperatures. The CH
3OH selectivity of the powder catalysts correlated well with the heat of formation of oxide. Although the SiO
2 support did not affect the CH
3OH selectivity of the metal, ZnO and Cs
2O improved it remarkably. Cu–Zn–Al catalysts are quite active for CH
3OH formation.
View full abstract
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Keiji Okada, Eietsu Hasegawa, Toshio Mukai
1983 Volume 12 Issue 3 Pages
305-308
Published: March 05, 1983
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The carbon–oxygen bond cleavage of epoxides, (
1) and (
3), was photochemically sensitized by 2,4,6-triphenylpyrylium tetrafluoroborate in methylene chloride to give carbonyl compounds, (
2) and (
4), with high efficiency (Φ>1) respectively. The reaction efficiency was strongly dependent on solvents and counter ions of the sensitizer.
View full abstract
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Norisuke Hata, Atsushi Yagi
1983 Volume 12 Issue 3 Pages
309-312
Published: March 05, 1983
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It was found that, while the photochemical isomerization of isoquinoline
N-oxide into lactam shows magnetic field effect due to HFI-J mechanism, the
N-oxides bearing an electron-donating substituent are insensitive to an external magnetic field. The results support strongly “radical ion pair mechanism” of the photochemical isomerization.
View full abstract
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Haruhiko Tomoda, Shojiro Saito, Shinsaku Shiraishi
1983 Volume 12 Issue 3 Pages
313-316
Published: March 05, 1983
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Several metallophthalocyanines (MPc: M=Ni(II), Co(II), Zn(II), Pb(II), Fe(II), Sn(II), Cd(II), Mg(II), and Mn(III)) were obtained by heating phthalonitrile with metal salts in alcohols in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene. Metal acetylacetonates as well as metal halides were available as metal sources for preparation of metallophthalocyanines by this method.
View full abstract
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Noboru Matsumura, Takayuki Ohba, Shigeo Yoneda
1983 Volume 12 Issue 3 Pages
317-318
Published: March 05, 1983
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Lithium 1,8-diazabicyclo[5.4.0]undec-7-en-6-ide (
1) has underwent the insertion of carbon dioxide and the resulting lithium 6-carboxylato complex (
2) transfered the carboxylato moiety to active methylene compounds (
3) such as
p-nitroacetophenone, acetophenone,
p-methoxyacetophenone, and
s-benzylthioacetate under mild conditions.
View full abstract
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Juji Yoshimura, Kazutoshi Hara, Tatsuya Sato, Hironobu Hashimoto
1983 Volume 12 Issue 3 Pages
319-320
Published: March 05, 1983
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Treatment of 2,3,4,6-tetra-
o-benzyl-1-
o-trimethylsilyl-α,β-
D-glucopyranose in dichloromethane with trimethylsilyl triflate catalyst gave the corresponding α,α- and α,β-trehaloses in quantitative yield. A similar treatment of
D-
galacto and
D-
manno analogs gave exclusively the corresponding α,α-anomers, respectively.
View full abstract
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Qing-shui Li, Kazunari Domen, Shuichi Naito, Takaharu Onishi, Kenzi Ta ...
1983 Volume 12 Issue 3 Pages
321-324
Published: March 05, 1983
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Photocatalytic synthesis of ammonia from N
2 and H
2O and its photodecomposition were investigated over SrTiO
3 and BaTiO
3 based catalysts. It was demonstrated that the yield of NH
3 formation increased markedly by the use of RuO
2 and NiO doped three component catalysts and that photodecomposition of NH
3 was coupled with photodecomposition of H
2O.
View full abstract
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Masahiro Kawasaki, Kazuo Kasatani, Toyohisa Uchida, Hiroyasu Sato
1983 Volume 12 Issue 3 Pages
325-328
Published: March 05, 1983
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Fluorescence spectra of single vibronic levels of the first excited singlet state of H
2CS have been measured under effusive flow conditions as a function of pressure. Weak non-resonance bands grow in with increasing pressure, demonstrating the existence of collisional vibrational relaxation of the 4
1 level to the 4
0 level.
View full abstract
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Masakatsu Nomura, Takayuki Kurosaki, Mikio Miyake
1983 Volume 12 Issue 3 Pages
329-332
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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Polyaromatics and polar materials of coal-derived hexane soluble were separated according to molecular size. UV spectra combined with their mass spectra revealed that the high-molecular-weight fractions consist of oligomer structures such as small aromatic units joining by methylene bridges and/or biaryl bonds.
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Hiroshi Hamana, Tsutomu Sugasawa
1983 Volume 12 Issue 3 Pages
333-336
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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Active methyl groups of nitrogen-containing heteroaromatic compounds react with benzaldehydes in the presence of 9-BBN triflate and diisopropylethylamine in dichloromethane to give the corresponding aldol-type products under mild conditions.
View full abstract
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Seiichiro Ogawa, Yoshikazu Iwasawa, Tatsushi Toyokuni, Tetsuo Suami
1983 Volume 12 Issue 3 Pages
337-340
Published: March 05, 1983
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Adiposin-1, the common constituent of pseudo-oligosaccharidic α-glucoside hydrolase inhibitor, adiposin, has been synthesized by coupling of the disaccharide epoxide and the protected
DL-valienamine, followed by deblocking.
View full abstract
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Saburo Nakanishi, Junji Nantaku, Yoshio Otsuji
1983 Volume 12 Issue 3 Pages
341-342
Published: March 05, 1983
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The reaction of α-halooximes with amidines in the presence of iron carbonyls gives imidazole derivatives in good yields. This reaction occurs via deoxygenation of 4
H-1,2,5-oxadiazines by iron carbonyls.
View full abstract
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Tadahiko Asano, Sumio Yokota, Oyo Mitsunobu
1983 Volume 12 Issue 3 Pages
343-346
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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The reaction of 2-propenylmagnesium chlorides with methyl 2,3-anhydro-4,6-
O-benzylidene-α-
D-allopyranoside (
1) or -gulopyranoside (
6) exclusively afforded the corresponding 2-deoxy-2-
C-(2-propenyl)-α-
D-hexopyranosides (
4b,
8a, and
8b).
View full abstract
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Akio Yasuhara, Keiichiro Fuwa
1983 Volume 12 Issue 3 Pages
347-348
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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1-Nitropyrene was converted by photolysis to a new compound, deep red needles, which was identified to be 1-nitro-2-hydroxypyrene.
View full abstract
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Yoshiaki Kurauchi, Kazuya Ohga, Shigeru Morita, Toshihiko Nagamura, Ta ...
1983 Volume 12 Issue 3 Pages
349-352
Published: March 05, 1983
Released on J-STAGE: March 27, 2006
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Pyridoxal Schiff bases of α-amino acids, phenylalanine and α-aminoisobutyric acid underwent photochemical decarboxylation in methanol to give pyridoxamine and carbonyl compounds after hydrolysis. Flash photolysis of the Schiff bases induced transient absorptions which were assigned to the decarboxylated quinonoid intermediates.
View full abstract
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Yoshifumi Tanimoto, Katsuko Shimizu, Hiroko Udagawa, Michiya Itoh
1983 Volume 12 Issue 3 Pages
353-356
Published: March 05, 1983
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The magnetic field effect(<80 mT) on the photoinduced electron transfer reaction between duroquinone and aromatic amines in SDS micellar solutions was studied by a nanosecond laser flash photolysis technique. The relative yield of diphenylamine cation free radical increases about 5 % at 79 mT, while that of triphenylamine cation free radical is almost magnetic field independent.
View full abstract
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Shigenori Nakano, Satoru Hinokuma, Takuji Kawashima
1983 Volume 12 Issue 3 Pages
357-360
Published: March 05, 1983
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A new sensitive kinetic method is proposed for the determination of chromium(III). The method is based on its catalytic effect on the reaction of 3-methyl-2-benzothiazolone hydrazone with
N,
N-dimethylaniline to form a violet compound (λ
max=590 nm) in the presence of hydrogen peroxide and ethylenediamine-
N,
N,
N′,
N′-tetraacetic acid as an activator. The method is selective and sensitive.
View full abstract
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Hidefumi Hirai, Keiichiro Wada, Makoto Komiyama
1983 Volume 12 Issue 3 Pages
361-364
Published: March 05, 1983
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An active carbon-supported copper(I) chloride is prepared as a solid adsorbent for carbon monoxide. It adsorbs carbon monoxide at 20°C under 1 atm and releases almost all of the adsorbed carbon monoxide by elevating the temperature to 120°C under 1 atm, or by reducing the pressure to 0.4 mmHg at 20°C.
View full abstract
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Tsutomu Kagiya, Chikara Komuro, Koichi Sakano, Sei-ichi Nishimoto
1983 Volume 12 Issue 3 Pages
365-368
Published: March 05, 1983
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2,2,6,6-Tetramethylpiperidine-1-oxyl bromide (TMPO
+Br
−) was found to mediate selectively the hydroxylation of thymine by water into thymine glycol at room temperature. Almost quantitative yield of thymine glycol was obtained at the molar ratio of [TMPO
+Br
−]
0/[Thymine]
0 = 2 in feed under neutral conditions. The reaction mixture showed the ESR spectrum characteristic of 2,2,6,6-tetramethylpiperidine-1-oxyl (TMPO·).
View full abstract
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Toshihiko Ikeda, Akito Abe, Kiyoshi Kikukawa, Tsutomu Matsuda
1983 Volume 12 Issue 3 Pages
369-372
Published: March 05, 1983
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New unsymmetrical and pseudo-symmetrical bis(benzocrown ether)s (
3,
4, and
5) were synthesized. The unsymmetrical crown ether
3 showed preferential complexation with Rb
+ over other alkali metal cations in solvent extraction (CH
2CL
2–H
2O) and in the behaviour as PVC membrane electrode, as compared to
4 and
5.
View full abstract
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Katsuyoshi Kobayashi, Takamasa Sagara, Mitsumasa Okada, Katsumi Niki
1983 Volume 12 Issue 3 Pages
373-376
Published: March 05, 1983
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A blue-green alga,
Anabaena eylindvioa, immobilized on the methyl viologen–polystyrene sulfonate–polyvinyl alcohol coated SnO
2 electrode showed a remarkable photoanodic current. The photocurrent onset potential corresponded to the energy level of the redox potential of methyl viologen, which was sufficient to generate hydrogen at a cathode.
View full abstract
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Naoshi Fujiwara, Hiroshi Tomiyasu, Hiroshi Fukutomi
1983 Volume 12 Issue 3 Pages
377-378
Published: March 05, 1983
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The rate of ligand exchange in tetrakis(2,4-pentanedionato)thorium(IV) was first measured by the
1H NMR line-shape analysis. The observed first-order rate constant is proportional to the concentration of free 2,4-pentanedione in enol form and the exchange is retarded by the addition of bases such as dimethyl sulfoxide and
N,
N-dimethylformamide.
View full abstract
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Junko Yamawaki, Shinjiro Sumi, Takashi Ando, Terukiyo Hanafusa
1983 Volume 12 Issue 3 Pages
379-380
Published: March 05, 1983
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Ultrasonic irradiation facilitates heterogeneous oxidation of secondary alcohols to ketones with solid potassium permanganate in nonpolar organic solvents.
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Hideki Murayama, Shohei Inoue, Yasukazu Ohkatsu
1983 Volume 12 Issue 3 Pages
381-384
Published: March 05, 1983
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Substitution reactions of
N-methyltetraphenylporphinatozinc ethyl and tetraphenylporphinatoaluminium ethyl with hindered phenols such as 2,6-di-
t-butyl-4-methylphenol and 2,6-di-
t-butyl-4-methoxyphenol are accelerated dramatically by the irradiation with visible light, to form the metalloporphyrins with the corresponding phenoxy group bound to zinc and aluminium.
View full abstract
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Teruaki Mukaiyama, Hiroyuki Yamashita, Masatoshi Asami
1983 Volume 12 Issue 3 Pages
385-388
Published: March 05, 1983
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Optically active bicyclic lactones are synthesized from ircides, derived from (
R)-(−)-2-amino-2-phenylethanol and
meso-cyclic-1,2-
cis-dicarboxylic acids, by successive treatment with sodium bis(2-methoxyethoxy)aluminum hydride and sodium borohydride, followed by acid hydrolysis. This reaction is successfully applied to the asymmetric synthesis of (1
R,3
S)-
cis-chrysanthemic acid.
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Yukio Abe, Tadashi Suehiro
1983 Volume 12 Issue 3 Pages
389-392
Published: March 05, 1983
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The migratory aptitude of the substituent groups in the Blaise rearrangement can be explained in terms of the pi-electronic properties of the groups in the highest occupied molecular orbitals. The rates of the rearrangement reaction with relation to the substituent groups were also rationally understood based on the energy levels of the molecular orbitals.
View full abstract
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Masashi Tanaka, Hitoshi Fujimoto, Kohji Kamiya, Jiro Tanaka
1983 Volume 12 Issue 3 Pages
393-396
Published: March 05, 1983
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Far-infrared spectra were measured with the AsF
5 doped polyacetylene films in order to understand the electrical conduction mechanism. From the reflection data, the mechanism of the insulator-metal transition is discussed. That is, the intermediately doped film consists of small metallic particles and the highest doped film becomes the homogeneous metal, while the soliton model may be supported for the light doping.
View full abstract
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Tetsuya Hasegawa, Hiroki Haraguchi, Keiichiro Fuwa
1983 Volume 12 Issue 3 Pages
397-400
Published: March 05, 1983
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The spectral line profiles of emission lines from hollow cathode lamps and an inductively coupled argon plasma have been measured by using a wavelength-modulation echelle monochromator. The data for the linewidths of Zn, Cd, Fe, Mg and Ca are provided along with a data correction method.
View full abstract
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Ken-ichi Okamoto, Masutaro Suzuki, Jinsai Hidaka
1983 Volume 12 Issue 3 Pages
401-404
Published: March 05, 1983
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Four isomers of the title complex, [Co(
L-aehc)(gly)]
+, were chromatographically isolated. The crystal structure and absolute configuration of the third eluted isomer were determined by X-ray diffraction study. This isomer has Δ configuration. The sulfur donor atom in the coordinated
L-aehc has
R configuration and the six-membered chelate ring takes a chair conformation.
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Akira Hosomi, Yasuyuki Sakata, Hideki Sakurai
1983 Volume 12 Issue 3 Pages
405-408
Published: March 05, 1983
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Reactions of α-heteroatom-substituted ethers and related compounds (R
1R
2CXY; X, Y = RO, RS and Cl) with silyl enol ethers and ketene silyl acetals took place in the presence of iodotrimethylsilane (Ia) and trimethylsilyl triflate (Ib) as a catalyst and factors influencing the activation of the heteroatom by I were examined.
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Hideki Sakurai, Yasuyuki Sakata, Akira Hosomi
1983 Volume 12 Issue 3 Pages
409-412
Published: March 05, 1983
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Iodotrimethylsilane and trimethylsilyl triflate activate selectively the C–Cl bond rather than the C–O bond of α-chloro ethers and catalyze the allylation with allylsilanes to give the corresponding homoallyl ethers effectively in good yield.
View full abstract
