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Masato Yoshida, Kazuaki Shimokoshi, Michio Kobayashi
1987 Volume 16 Issue 3 Pages
433-436
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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In the reaction of bis(heptafluorobutyryl) peroxide with carbanions and a thiolate anion, two types of reactions were observed; one is an electron transfer reaction to give perfluoropropylated compounds and the other is a nucleophilic substitution.
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Michiaki Takasaki, Kaoru Harada
1987 Volume 16 Issue 3 Pages
437-440
Published: March 05, 1987
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Argon Arc Plasma containing nitrogen gas (nitrogen arc plasma) was directly introduced into water, and a disproportionation reaction of molecular nitrogen took place in aqueous solution to form ammmonia, nitrous acid, and nitric acid. The redox reaction of molecular nitrogen is interesting on the chemical evolutionary point of view as a possible route for the formation of ammonia under non-reducing conditions.
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Tomoharu Ama, Sumio Kaizaki, Hiroshi Kawaguchi, Takaji Yasui
1987 Volume 16 Issue 3 Pages
441-444
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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Iminodiacetic acid containing asymmetric carbon with
S chirality (H
2ida(C
s); HOOCCH
2NHC
*HDCOOH) was prepared by stereospecific deuteration of (−)
563CD-mer(O)cis(N
c)-[Co(ida)(edma)]. Using this H
2ida(C
s), u-fac-[Co(ida(C
s))(mdien)]
+ was prepared and optically resolved. On the basis of the
1H NMR spectra of the chelating ida(C
s), the absolute configuration of the (−)
550CD isomer was assigned to ΔΛΔ.
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Yoshio Ito, Shiro Terashima
1987 Volume 16 Issue 3 Pages
445-448
Published: March 05, 1987
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The title thienamycin intermediate was efficiently synthesized from (
S)-ethyl lactate (
3) by subjecting (3
S,4
S)-3-acetyl-4-[(
S)-1-benzyloxyethyl]-2-azet idi none readily obtainable from
3, to sequential reactions in which base catalyzed elimination and regioselective hydroboration were employed as the key processes.
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Masashi Hojo, Hironori Nagai, Minoru Hagiwara, Yoshihiko Imai
1987 Volume 16 Issue 3 Pages
449-452
Published: March 05, 1987
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A new polarographic method to study complex formation has been applied to the anodic waves of halide ions in acetonitrile. The formation of complexes, such as (Li
+)
2Cl
−, (HR)
2Cl
− (HR = p-bromophenol), (Li
+)(HR)Cl
−, (Li
+)
2(HA)Cl
− (HA = benzoic acid) was clarified.
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Tetsuo Otsuki
1987 Volume 16 Issue 3 Pages
453-454
Published: March 05, 1987
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The 3,4-double bond of photoexcited furocoumarin shows a higher reactivity than the 4′,5′-double bond toward simple olefins, leading to the formation of cyclobutane derivatives.
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Yoshiharu Matsubara, Shin-ichi Takekuma, Hiroshi Yamamoto, Tetsuo Nozo ...
1987 Volume 16 Issue 3 Pages
455-458
Published: March 05, 1987
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Autoxidation of guaiazulene either at 85 °C in
N,
N-dimethylformamide-0.5 M sulfuric acid or at 25–35 °C on the surface of a filter paper yielded, together with other products, the two title compounds which were shown to be in equilibrium and to constitute important intermediates for the intermolecular one-carbon transfer reactions frequently observed during autoxidation of many azulenic hydrocarbons.
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Akiko Kobayashi, Reizo Kato, Hayao Kobayashi, Shinji Moriyama, Yutaka ...
1987 Volume 16 Issue 3 Pages
459-462
Published: March 05, 1987
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The crystal of a new ambient-pressure superconductor, κ-(BEDT-TTF)
2I
3 belongs to the monoclinic system with space group P2
1/c and a=16.387, b=8.466, c=12.832 Å and β=108.56°. The 2-dimensional(2D) metal sheets composed of paired BEDT-TTF molecules and the I
3 anion sheets are arranged alternately along the
a. direction. The orientation of the neighbouring paired molecules is almost perpendicular to each other.
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Nobuharu Iwasawa, Teruaki Mukaiyama
1987 Volume 16 Issue 3 Pages
463-466
Published: March 05, 1987
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An essentially mild and efficient catalyst system, the combined use of trimethylsilyl chloride and tin(II) chloride, is effectively employed for the activation of acetals, aldehydes, orthoesters, and α,β-unsaturated ketones to accomplish the reaction with silyl enol ethers to give the corresponding addition products in good yields.
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Katsuhiro Aoyagi, Hiroo Toi, Yasuhiro Aoyama, Hisanobu Ogoshi
1987 Volume 16 Issue 3 Pages
467-470
Published: March 05, 1987
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High-spin cobalt(II) complexes of
N-alkyl-octaethylporphyrin have been characterized by
1H-NMR measurements. Proton signals of
N-alkyl groups and aromatic meso-protons were assigned by deuteration method. Axially coordinated imidazole resonance appeared at very low magnetic field.
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Takayuki Suga, Hiroki Hamada, Toshifumi Hirata
1987 Volume 16 Issue 3 Pages
471-474
Published: March 05, 1987
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The biotransformation of the enantiomeric pairs of bicyclo[3.1.1]heptane derivatives with the cultured cells of
Nicotiana tabacum was investigated. The hydrogenation of the C–C double bond of verbenone took place enantioselectively in preference of the (1
S,5
S)-enantiomer and the hydrogen attack occurred stereospecifically from the
re-face at its C-2. The oxidation of the hydroxyl group of neoisopinocampheol occurred enantioselectively in preference of the (1
S,2
S,3
R,5
R)-enantiomer, whereas such an enantioselective oxidation was not the case for neoisoverbanol.
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Takeaki Kakigano, Takahiro Kanda, Masaru Ishida, Shinzi Kato
1987 Volume 16 Issue 3 Pages
475-478
Published: March 05, 1987
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The reaction of bis(acyl) tellurides with primary or secondary amines or potassium ethanolate yielded the corresponding tellurocarboxylic acid salts, which are readily oxidized with iodine or benzenesulfonyl chloride to afford novel bis(acyl) ditellurides.
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Teruaki Mukaiyama, Richard S. J. Clark, Nobuharu Iwasawa
1987 Volume 16 Issue 3 Pages
479-482
Published: March 05, 1987
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Tin(II) enolates react with
p-benzoquinone and its mono-
N-tosylimino derivative to give 1,2-adducts in good yield. These can be reduced in situ to α-(
p-hydroxy- or
p-aminophenyl) carbonyl derivatives by addition of dichloromethylsilane and dimethylaminopyridine.
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Kiyoshi Otsuka, Takayuki Komatsu
1987 Volume 16 Issue 3 Pages
483-484
Published: March 05, 1987
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The catalytic activity of Sm
2O
3 for oxidative coupling of CH
4 was measured at the conditions: P(CH
4)/P(O
2)=6, P(O
2)=14.5 kPa, W/F=0.000223–0.0891 g·h·l
−1 , and T=750 °C. STY of C
2-compounds reached to 2.98 mol·g
−1·h
−1 at W/F of 0.000223 g·h·l
−1. The catalytic activity of Sm
2O
3 was one to three orders of magnitude greater than those reported for other metal oxides.
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Kazuhiro Maruyama, Hitoshi Tamiaki
1987 Volume 16 Issue 3 Pages
485-486
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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In methanol, quadricyclanes isomerized to norbornadienes by the catalytic action of silver(I), and methanol added to quadricyclanes by the action of proton. It was first confirmed that silver(I) was the real active species in the isomerization.
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Shinji Nonoyama, Noriyuki Yonezawa, Kazuhiko Saigo, Tsuneo Hirano, Mas ...
1987 Volume 16 Issue 3 Pages
487-490
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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2a-Substituted dichlorocyclobuta[
c]quinolin-3-one was obtained from the cross photocycloadduct of 2-quinolone and tetrachloroethylene by the reaction with bases or nucleophiles via cyclobutene formation and intermolecular S
N2′ displacement along with trichloroethenyl-2-quinolone via [2+2] cycloreversion of the cyclobutene intermediate.
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Teruaki Mukaiyama, Shu Kobayashi, Masanori Tamura, Yukihiro Sagawa
1987 Volume 16 Issue 3 Pages
491-494
Published: March 05, 1987
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The aldol reaction of silyl enol ethers with acetals or aldehydes, and the Michael reaction of silyl enol ethers with α,β-unsaturated ketones are efficiently catalyzed by the combined use of trityl chloride and tin(II) chloride under extremely mild conditions.
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Syun-ichi Kiyooka, Fuminori Shiota, Tsutomu Shibuya
1987 Volume 16 Issue 3 Pages
495-496
Published: March 05, 1987
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Triphenylgermylacetyltriphenylgermane, Ph
3GeCH
2COGePh
3, with aldehydes has been found to afford the corresponding aldol products in the presence of boron trifluoride etherate in good yields.
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Takayuki Suga, Rong-yu Zheng, Shinji Ohta, Takamitsu Yoshioka, Toshifu ...
1987 Volume 16 Issue 3 Pages
497-500
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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When (
E,
E)-farnesol was enzymatically synthesized from an equimolar mixture of 3,3-dimethylallyl pyrophosphate and (
E)- or (
Z)-[4-
2H]isopentenyl pyrophosphate (IPP) in the presence of iodoacetamide with a farnesyl pyrophosphate synthetase fraction prepared from
Pisum sativum, the unusual addition of allylic residue to the
re-
re, face of the carbon-carbon double bond of IPP was found to occur. This finding was the first example of the unusual chain elongation against Cornforth’s stereochemical picture for the biosynthesis of isoprenoids.
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Tsuneo Imamoto, Mitsumasa Ono
1987 Volume 16 Issue 3 Pages
501-502
Published: March 05, 1987
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Samarium(III) iodide reacts with samarium metal in tetrahydrofuran under mild conditions to afford samarium(II) iodide in almost quantitative yield. A solution of samarium(II) iodide in tetrahydrofuran is prepared from samarium metal and iodine.
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Hatsue Tamura, Tomohiro Sato, Kazuhide Ogawa, Shinichi Yano, Kenichi S ...
1987 Volume 16 Issue 3 Pages
503-506
Published: March 05, 1987
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The molecular structure of cholesteryl perfluoropropionate(CPFP) was determined by X-ray analysis. The side chain at C(17) has an extended conformation, while the perfluoropropionate chain at C(3) is disordered in a bent conformation. The molecules, the best planes through the tetracyclic ring-system of which are nearly parallel to the ac plane, form a layered structure.
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Reizo Kato, Hayao Kobayashi, Akiko Kobayashi, Shinji Moriyama, Yutaka ...
1987 Volume 16 Issue 3 Pages
507-510
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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Electrochemical oxidation of a solution containing BEDT-TTF, (n-C
4H
9)
4NI
3,and small amount of (n-C
4H
9)
4NAuI
2 gave a new ambient-pressure superconductor (T
c=3.6 K), which coexisted with the superconducting θ-type salt but was clearly distinguished by the X-ray examination. The crystal data are: (C
10H
8S
8)
2I
3, monoclinic, P2
1/c, a=16.387(4), b=8.446(2), c=12.832(8) Å, β=108.56(3)°, V=1687.6 Å
3, Z=2.
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Eiichi Miyoshi, Yoshikazu Shizuri, Shosuke Yamamura
1987 Volume 16 Issue 3 Pages
511-514
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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In an effort to search for stimulants concerning with circadian rhythm in several nyctinastic plants, potassium chelidonate was isolated as a bioactive substance from the plant
Cassia mimosoides L. and
C. occidentalis L. This potassium salt has been proved to be quite effective for leaf-closing of the plants
Mimosa pudica,
Cassia mimosoides L. and others.
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Shigeru Nishiyama, Yoshikazu Shizuri, Hiroaki Toshima, Masami Ozaki, S ...
1987 Volume 16 Issue 3 Pages
515-518
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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Epiisocitreoviridinol, biogenetically relevant to citreoviridinol, has been isolated as a new metabolite of
Penicillium citreo-viride B. (IFO 6049). Its stereostructure including the absolute configuration has been determined unambiguously by its total synthesis in optically active form.
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Katsuyoshi Shibata, Katsuyoshi Urano, Masaki Matsui
1987 Volume 16 Issue 3 Pages
519-520
Published: March 05, 1987
Released on J-STAGE: March 27, 2006
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When chalcones were treated with potassium superoxide (KO
2) in acetonitrile under ultrasound irradiation, chalcone-acetonitrile adducts were obtained in moderate yields.
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Takamasa Fuchikami, Yoshiko Shibata, Hisao Urata
1987 Volume 16 Issue 3 Pages
521-524
Published: March 05, 1987
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Palladium-catalyzed reaction of polyfluoroalkyl halides with allylic alcohols in the presence of potassium carbonate gives polyfluoroalkylmethyl-substituted oxiranes directly. Perfluoroalkyl-substituted enynes can be also prepared from perfluoroalkyl iodides and terminal alkynes under similar conditions.
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Hiroyuki Yamashita
1987 Volume 16 Issue 3 Pages
525-528
Published: March 05, 1987
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The asymmetric ring-opening of symmetrical oxiranes with aniline or trimethylsilyl azide is effectively catalyzed by zinc (2
R,3
R)-tartrate or cupric (2
R,3
R)-tartrate to give
trans N-phenyl (β-amino alcohol or
trans O-trimethylsilyl 2-azido alcohols in 17–52% ee. The latter azido products can be easily converted into optically active
trans β-amino alcohols by two-step procedure.
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Hiroshi Sasaki, Akihiko Ueno, Tetsuo Osa
1987 Volume 16 Issue 3 Pages
529-532
Published: March 05, 1987
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Membrane potential across Poly(vinyl chloride) entrapping 2,3-Diphenylindenone oxide was reversibly controlled by UV and visible light irradiation. The magnitude of photo-induced potential change depended upon the concentration of electrolyte solution.
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Satsuo Kamata, Fumiuki Ogawa, Masaomi Fukumoto
1987 Volume 16 Issue 3 Pages
533-534
Published: March 05, 1987
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Polyvinyl chloride (PVC) membrane electrode based on o-xylene bis(diethyldithiocarbamate) which was newly synthesized as a neutral carrier, exhibits a Nernstian behavior to copper(II) ion for activity range of 10
−1 M to 10
−5 M. The electrode has given good response for the time and selectivity.
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Ikuya Matsuura, Kiyomi Yoshida, Atsuhito Mori
1987 Volume 16 Issue 3 Pages
535-538
Published: March 05, 1987
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(VO)
2P
2O
7 is oxidized to β-VOPO
4 via β′-phase (d = 4.87, 4.23, 3.19, 2.64 Å) which was probably a phosphate such as VPO
4.75 containing vanadium in the average oxidation state of + 4.5. However, when excess phosphorus is present in (VO)
2P
2O
7, oxidation stops at the stage of β′-phase. This suggests that the new phase, β′-VPO
4.75, is a selective catalyst for
n-butane oxidation to maleic anhydride.
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Hiroshi Nishihara, Masahiro Tateishi, Kunitsugu Aramaki, Toshiyuki Ohs ...
1987 Volume 16 Issue 3 Pages
539-542
Published: March 05, 1987
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Electroreduction of α,α,α′,α′-tetrabromo-p-xylene at an indium tin oxide (ITO), platinum, copper or nickel electrode in ethereal solution afforded a thick and uniform poly(
p-phenylene vinylene) film in the undoped state. Addition of Cr(CO)
6 or Mo(CO)
6 accelerated the film growth at the ITO electrode.
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Hiroshi Nakamura, Akihiro Uehata, Akira Motonaga, Takeshi Ogata, Taku ...
1987 Volume 16 Issue 3 Pages
543-546
Published: March 05, 1987
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Effects of external magnetic fields on electron transfer reactions in porphyrin–viologen linked systems (ZnPC
nV) were investigated by laser photolysis. Rates of reverse electron transfer in the photogenerated intramolecular ion radical pair, as originated from quenching of porphyrin triplet by viologen, were remarkably suppressed (by a factor of ten for n=8) at above 0.1 T. The lifetime of the charge separated state could be correspondingly extended by the use of external magnetic fields, which perturb electron spin relaxation process.
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Shinsaku Kanbe, Kohji Kishio, Koichi Kitazawa, Kazuo Fueki, Hidenori T ...
1987 Volume 16 Issue 3 Pages
547-550
Published: March 05, 1987
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The superconducting critical temperature T
C increased with increase in x in (La
1−xSr
x)
2CuO
4−δ associated with the shortening of the Cu–O bond in the basal plane and the elongation of the lattice along the c-axis in the K
2NiF
4. structure. The results are discussed in terms of two-dimensional itinerant band formation of Cu:d
x2-y2–O:p
σ bond.
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Ken-ichi Okamoto, Takaji Yasui, Jinsai Hidaka
1987 Volume 16 Issue 3 Pages
551-554
Published: March 05, 1987
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The crystal structure and the absolute configuration of the title complex cation, (−)
570CD-mer-[Co(mida)(dien)]
+, was determined by the X-ray diffraction study of its (−)
580CD-(ethylenediaminetetraacetato)cobaltate(III) salt dihydrate. The relationship between the absolute configuration and the CD spectra for the mer isomers of the dien complexes with mida or iminodiacetate is also reported.
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