-
Manuel Soriano-Garcia, Manuel Jimenez, M. Gonzalez, A. Hernandez, M. S ...
1983 Volume 12 Issue 5 Pages
617-620
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Crystal and molecular structure of piquerol A isolated from Piqueria trinervia Cav was determined. The X-ray study confirms that in the solid-state the structure of piquerol A is similar to that inferred from NMR spectra. The isopropenyl group is planar and makes approximately 38.4° with the mean plane for the six-membered ring. The two hydroxyl groups are above the plane through the six-membered ring, while the C4 and H5 are below this plane.
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Yasuhiro Iwasawa, Makoto Yamada, Sadao Ogasawara, Yoshiharu Sato, Haru ...
1983 Volume 12 Issue 5 Pages
621-624
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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It is shown by means of Extended X-ray Absorption Fine Structure (EXAFS), IR and UV spectroscopies and by temperature programmed decomposition (TPDE) and gas phase analyses that Fe
3(CO)
12 reacted with the surface OH group of γ-Al
2O
3 to give the surface complex, Fe
3(CO)
10(H)(OAl(
Remark: Graphics omitted.)), while Fe
3(CO)
12 was weakly supported on SiO
2 retaining its original structure and chemical nature.
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Shoichi Hayashida, Hirotsugu Sato, Shungo Sugawara
1983 Volume 12 Issue 5 Pages
625-626
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Artificial ammonium type lipids form bilayer structures in water-soluble polymer film similar to those in water dispersion. Bilayer structures were also formed even when the content of the hydrophobic substance is considerably high (50 mole%).
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Kimiaki Yamamura, Kazuhiro Nakasuji, Hideki Yamochi, Ichiro Murata, Sa ...
1983 Volume 12 Issue 5 Pages
627-630
Published: May 05, 1983
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Some 9,10-dihydro-9,10-ethano-[1,4]-bis(dicyanomethylene)anthracene derivatives have been synthesized. The substituent effects on the charge-transfer band shifts of these compounds strongly supported our previously proposed argument for the charge-transfer transition for the symmetry-forbidden charge-transfer interaction.
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Etsuo Niki, Tadatoshi Saito, Yoshio Kamiya
1983 Volume 12 Issue 5 Pages
631-632
Published: May 05, 1983
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Ascorbic acid (vitamin C) was found to act as a radical scavenger and suppress the oxidation of methyl linoleate in homogeneous alcohol solution in the presence of radical initiator. Furthermore, vitamin C showed a synergistic effect when used with vitamin E.
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Kazuhiko Tanaka, Kazuhiko Ootake, Keisuke Imai, Nobuo Tanaka, Aritsune ...
1983 Volume 12 Issue 5 Pages
633-636
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Dianions derived from β-hydroxy sulfones are highly reactive toward a variety of electrophiles including alkyl halides, carbonyl compounds, and sodium iodoacetate. A convenient synthetic method for 4-alkyl- and 5-alkyl-2(5
H)-furanones has been developed by using these dianions. A new synthetic approach to
trans-3,4-bis(3-hydroxybenzyl)dihydro-2(3
H)-furanone, the first lignan found in humans, via a facile reduction of 2(5
H)-furanone with Mg-methanol is also decribed.
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Kentaro Takagi, Naomi Hayama
1983 Volume 12 Issue 5 Pages
637-638
Published: May 05, 1983
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Convenient procedure for an Ullmann-type coupling of alkenyl halides using zinc powder, nickel(II) chloride, and potassium iodide and/or thiourea is presented. One double bond in the produced diene retained the configuration of a starting material, while partial cis–trans isomerization was observed in the second one.
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Yoichi Shindo, Kazuyuki Horie, Itaru Mita
1983 Volume 12 Issue 5 Pages
639-642
Published: May 05, 1983
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Kinetic parameters for photodimerization of ethyl cinnamate were determined in dilute ethanol solution (3∼5×10
−5M) where the spontaneous deactivations of excited states proceed much faster than their bimolecular reactions. The quantum yield of cyclodimer formation from excited singlet state, Φ
DM′/[C]
0 ≅ τ
Mκ
DM, and that from excited triplet state, Φ
ISCφ
DT′/[C]
0 ≅ Φ
ISCτ
Tκ
DT, are 15 M
−1 and 13 M
−1, respectively, in ethanol at 30 °C.
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Hidefumi Hirai, Naoki Toshima, Shinji Hayashi, Yasufumi Fujii
1983 Volume 12 Issue 5 Pages
643-646
Published: May 05, 1983
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Interactions of monomer forms of protoporphyrin IX, deuteroporphyrin IX, hematoporphyrin IX, and coproporphyrin III, respectively, with α- and γ-cyclodextrin in 0.002 mol·dm
−3 NaOH aqueous solution are indicated by change of electronic spectrum and induction of circular dichroism. Dimerization constant of porphyrin and complex formation constant of porphyrin with cyclodextrin are also determined from the electronic spectra.
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Noriyuki Sotani, Masakazu Kunitomo, Masatomo Hasegawa
1983 Volume 12 Issue 5 Pages
647-650
Published: May 05, 1983
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Hydrogen molybdenum bronze, H
0.3MoO
3, is decomposed through two processes on vacuum heating with evolution of H
2O. One is the low-temperature process without structural change. The other is the high-temperature process with structural change from the bronze to MoO
3* which is a non-stoichiometric MoO
3 structure.
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Tong Hei Kim, Yoshio Hayase, Sachihiko Isoe
1983 Volume 12 Issue 5 Pages
651-652
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Irradiation of 10-alkyl-10-carbomethoxy-β-ionones
1a,
b under basic conditions gave 2-oxatricyclo[4,4,0,0
1.5]-decane derivatives
5a,
b; the mechanism involves initial cis–trans isomerization of the C
7–C
8 double bonds followed by [2+4] cycloaddition reaction and double bonds isomerization.
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Richard Neidlein, Christoph Martin Radke, Reiner Gottfried
1983 Volume 12 Issue 5 Pages
653-656
Published: May 05, 1983
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2- and 3-Alkoxy-1,6-methano-[10]-annulenes were coupled with aryldiazonium salts yielding the corresponding quinone hydrazones as cycloheptatriene derivatives. Analytical data are discussed.
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Keiji Ito, Nobuhiro Kamiyama, Saburo Nakanishi, Yoshio Otsuji
1983 Volume 12 Issue 5 Pages
657-660
Published: May 05, 1983
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Aliphatic aldehydes undergo a catalytic trimerization to give 1,3-diol monoesters upon treatment with Fe
3(CO)
12 in pyridine or with Fe
3(CO)
12-pyridine
N-oxide in benzene. Polynuclear carbonylferrates serve as catalyst for this transformation.
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Fumio Toda, Koichi Tanaka
1983 Volume 12 Issue 5 Pages
661-664
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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When a solution of a cyanohydrin and brucine in methanol was kept at room temperature, one optically active isomer of the cyanohydrin was obtained as brucine complex in a yield of more than 50%.
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Koji Araki, Masato Sakuma, Shinsaku Shiraishi
1983 Volume 12 Issue 5 Pages
665-666
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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D-Fructose is oxidatively degraded to
D-erythrose with iron(III) chloride by photo-irradiation through Pyrex under aerobic as well as anaerobic condition. The reaction is suggested to proceed via formation of iron(III)-
D-fructose complex and subsequent photo-redox process.
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TsuyoShi Satoh, Satoru Uwaya, Koji Yamakawa
1983 Volume 12 Issue 5 Pages
667-670
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Bis(diisobutylaluminum) 1,2-ethanedithiolate (
9) made from diisobutylaluminum hydride and ethanedithiol in benzene is useful to convert oxyacetals into thioacetals, however not effective to ketones.
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Teruaki Mukaiyama, Yukihisa Goto, Shin-ichiro Shoda
1983 Volume 12 Issue 5 Pages
671-674
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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L-Daunosamine was conveniently synthesized from β-amino amide
1 obtained by the stereoselective addition of α-lithio
N,
N-dimethylacetamide to the imine of 2,3-
O-cyclohexylidene-4-deoxy-
L-threose in the presennce of zinc halide.
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Waro Nakanishi, Yasuhiro Yamamoto, Yoshiaki Kusuyama, Yoshitsugu Ikeda ...
1983 Volume 12 Issue 5 Pages
675-678
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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1H and
13C NMR chemical shifts of dimethyl selenide, selenoanisole, diphenyl selenide, phenoxyselenine, and phenoxytellurine and their chlorine, bromine, and iodine adducts have been measured to disclose the structure of the adducts in solution. The bromine adduct of selenoxanthone was found to have the structure of a molecular complex. The relative stability of selenuranes is discussed.
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Toshiya Kumagai, Susumu Mizuta
1983 Volume 12 Issue 5 Pages
679-682
Published: May 05, 1983
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The Mg–S–I water splitting cycle was demonstrated on a laboratory scale by constructing an apparatus for repeated operations of chemical reactions of the whole cycle and by the circulation of reactants through purely thermochemical processes below 1000°C. Electric furnaces and quartz glass reactors were used. Sixteen times of cycle operations were performed in 16 h with production rates of 0.3 liter H
2/h and 0.15 liter O
2/h.
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Teruaki Mukaiyama, Junji Ichikawa, Masatoshi Asami
1983 Volume 12 Issue 5 Pages
683-686
Published: May 05, 1983
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Various carboxylic esters or carboxamides are prepared in good yields under nearly neutral conditions from equimolar amounts of free carboxylic acids and alcohols or amines, respectively, by the use of 1,1′-dimethylstannocene as a condensing reagent.
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Toshitaka Hori, Taitiro Fujinaga
1983 Volume 12 Issue 5 Pages
687-690
Published: May 05, 1983
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The existence of two species of molybdophosphate has been recognized in aqueous acetonitrile solutions. The one, which was called here as “extraordinary” molybdophosphate, forms quite rapidly and exhibits a bright yellow colour, but is unstable and undergoes a spontaneous conversion to the other. The latter complex would be of dodecamolybdophosphate in Keggin’s structure.
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Isao Karube, Motoo Yamazaki, Hideaki Matsuoka, Shuichi Suzuki
1983 Volume 12 Issue 5 Pages
691-692
Published: May 05, 1983
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3′, 3′-Dimethyl-6-nitrospiro(2
H-1-benzopyran-2,2′-indoline) -1′-propionic acid [I] was modified with a methoxy group at 8th position of the pyran ring. The stability of photoresponsive activity was 3.4 times higher than that of [I]. The new spiropyran is promising for the photocontrol of enzyme activity.
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Klaus Hartke, Ulrike Lohmann
1983 Volume 12 Issue 5 Pages
693-696
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Primary amines react with 1,2-naphthoquinone-4-sulfonic acid to form violet dyes in a complex redox reaction. Their general structure
6 has been established by an independent synthesis.
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Shigeru Futamura, Hiroyuki Ohta, Yoshio Kamiya
1983 Volume 12 Issue 5 Pages
697-700
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Sensitized photooxidation of
cis-α,α’-dimethylstilbene(
1) depends on sensitizer, solvent, and temperature. At room temperature, Ru(bpy)
32+- or TPP- sensitized photooxidation reaction of
1 affords a dioxetane hydroperoxide(
2), while only an allylic hydroperoxide(
3) is obtained when RB or MB is used as sensitizer. At low temperature,
2 comes to be formed independent of the sensitizer used.
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Kenji Matsushima, Hirofumi Kobayashi, Yohji Nakatsuji, Mitsuo Okahara
1983 Volume 12 Issue 5 Pages
701-704
Published: May 05, 1983
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Octyl monoaza 18-crown-6 and the corresponding nitrogen lariat ethers were discolsed to be good carriers for the active transport of alkali metal cations. The transport ability is well corresponding to the complexing ability and the transport system has a characteristic of using the large change in the complexing ability between the acidic and alkaline phases.
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Taira Imamura, Koichi Hasegawa, Masatoshi Fujimoto
1983 Volume 12 Issue 5 Pages
705-708
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Mo
VO(tpp)Br (tpp = meso-tetraphenylporphinato) is reduced by superoxide ion, O
2−, to Mo
IVO(tpp) in 1%(v/v) DMSO–CH
2Cl
2 medium at 25 °C via an intermediate. The intermediate is suggested to be a dioxygen complex and stably exists in the solution at −72 °C. The oxidation state of the central molybdenum in the intermediate complex reversibly changes with temperature between 4+ at −80 °C and 5+ at 0 °C.
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Kazuhito Hashimoto, Tomoji Kawai, Tadayoshi Sakata
1983 Volume 12 Issue 5 Pages
709-712
Published: May 05, 1983
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A hydrogen production system for visible light without an electron relay, efficient in the high pH region, is constructed with some fluorescein derivatives in the presence of a redox catalyst and a sacrificial reducing agent.
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S. Sarma Nittala, Hideyuki Ikehira, Isao Saito, Teruo Matsuura
1983 Volume 12 Issue 5 Pages
713-714
Published: May 05, 1983
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A fixed paraquinoid tautomer of 8-hydroxy-5-deazaflavin has been synthesized by five-step sequence. The existence of paraquinoid-phenolic tautomerism in ethanolic solution was demonstrated by trapping experiment.
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Yasuo Tohda, Masahiro Ariga, Toshihide Kawashima, Eizo Matsumura
1983 Volume 12 Issue 5 Pages
715-718
Published: May 05, 1983
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Alkylammonium salts of anionic σ-adducts of 1-methyl-3,5-dinitro-2-pyridone with amine- and carbon-nucleophiles were isolated and characterized. All the nucleophiles are attached to C-6 of the pyridone nucleus. The carbon-adducts are more stable than the amine-adducts, which dissociate in dilute methanol solutions. The acetone-adduct was converted into 4-nitro-1-pyrrolidinylbenzene quantitatively by heating with pyrrolidine.
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Kinya Suzuki, Tadashi Hattori, Akira Miyamoto, Yuichi Murakami
1983 Volume 12 Issue 5 Pages
719-720
Published: May 05, 1983
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Exposed surface area of V
2O
5 on V
2O
5/Al
2O
3 catalysts was determined by temperature programmed desorption of NH
3. The exposed surface was mostly composed of (010) face of V
2O
5 at low V
2O
5 content, but the exposed surface areas of other faces were comparable to that of (010) face at high V
2O
5 content.
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Tsutomu Shikada, Takamasa Oba, Kaoru Fujimoto, Hiro-o Tominaga
1983 Volume 12 Issue 5 Pages
721-724
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Among the several combinations of hydrogensulfate salts tested, a molten salt of NaHSO
4/LiHSO
4 was shown to be most effective as a reaction medium for the simultaneous removal of NO
X and SO
X from flue gas catalyzed by V
2O
5. ESR study revealed that V
2O
5 dissolved in the molten salt was partly reduced, during the reaction, to V
4+ suggesting a redox cycle of vanadium constituted an essential part of the catalysis.
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Kikumasa Sato, Osamu Miyamoto, Seiichi Inoue, Fumio Furusawa, Yasusuke ...
1983 Volume 12 Issue 5 Pages
725-728
Published: May 05, 1983
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As the key compound for the construction of cisoid terpenoids, (2
Z ,6
Z)-8-benzyloxy-1-chloro-2,6-dimethylocta-2,6-diene was synthesized stereoselectively via the Wittig reaction starting from nerol. The ten-carbon building block was coupled with prenyl or neryl
p-tolyl sulfone to afford, after reductive desulfonylation, (
Z,
Z)-farnesol and (
Z,
Z,
Z) -nerylnerol, respectively.
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Akira Saito, Hajime Matsushita, Hajime Kaneko
1983 Volume 12 Issue 5 Pages
729-732
Published: May 05, 1983
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Cyclization of
trans-β-monocyclohomofarnesic acid and the related compounds was closely examined in order to elucidate the reaction mechanism. It was revealed that the cyclization of
trans-β-monocyclohomofarnesic acid proceeds via formation of the cationic intermediate followed by concerted lactonization to give
trans-anti-
trans norambreinolide stereoselectively.
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Hirotaka Ihara, Yuichi Hashiguchi, Toyoki Kunitake
1983 Volume 12 Issue 5 Pages
733-736
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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The titration behavior of long-chain(hydrocarbon and fluorocarbon) hydroxamic acids in the presence and absence of micellar matrices is influenced by phase separation of hydrocarbon and fluorocarbon species. The same factors operate in the hydrolysis of phenyl esters.
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Miki Niwa, Shoji Morimoto, Tadashi Hattori, Yuichi Murakami
1983 Volume 12 Issue 5 Pages
737-738
Published: May 05, 1983
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In the cracking of C
8-paraffins mixture, silanated H-mordenite was active for the shape-selective cracking of octane with 2,2,4-trimethylpentane remaining unreacted.
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Yoshiaki Kiso, Masatoshi Inai, Kouki Kitagawa, Tadashi Akita
1983 Volume 12 Issue 5 Pages
739-742
Published: May 05, 1983
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The 2,2,2-trichloroethoxycarbonyl (Troc) group attached at the
Nin function of tryptophan by acylation with Troc-Cl in the presence of a catalytic amount of tetra-
n-butylammonium hydrogensulfate can be quantitatively removed either by cadmium dust in acetic acid or under basic conditions, e.g., hydrazine hydrate and NaOH, but is resistant to strong acidic conditions.
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Kyosuke Satake, Tsutomu Kumagai, Toshio Mukai
1983 Volume 12 Issue 5 Pages
743-746
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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Upon treating under basic or acidic conditions, tetrahydropyrrolo[3,2-
b]pyrrole derivative
3 easily undergoes demethoxycarbonylation or ring-opening reactions affording bicyclic diimine
5 or pyrrole derivatives such as
10 and
12. In addition, dehydrogenation of
3 results in the formation of dihydropyrrolo[3,2-
b]pyrrole derivative
13, which shows [4+2] cycloaddition reaction with dimethyl acetylene dicarboxylate to give indole derivative
15.
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Seiji Shinkai, Kenichi Inuzuka, Osamu Manabe
1983 Volume 12 Issue 5 Pages
747-750
Published: May 05, 1983
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A crown ether capped with a redox-functionalized thiol-disulfide couple was synthesized. The oxidized form with an ionophoric cap binds K
+, Rb
+, and Cs
+ more efficiently than the reduced form with two lariat-type groups. This is the first example of the redox-switched interconversion between crown and cryptand.
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Shunichi Fukuzumi, Yuji Kondo, Toshio Tanaka
1983 Volume 12 Issue 5 Pages
751-754
Published: May 05, 1983
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New evidence for a stepwise mechanism which requires a single electron transfer activation in the hydride transfer from an NADH model compound, 1-benzyl-1,4-dihydronicotinamide (BNAH), to tetracyanoethylene (TCNE) has been presented based on the effects of pyridine on the stoichiometry of the overall reaction, the rate constant, and the kinetic isotope effect.
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Yoshio Okahata, Han-jin Lim, Gen-ichi Nakamura
1983 Volume 12 Issue 5 Pages
755-758
Published: May 05, 1983
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Nylon ultrathin capsules coated with sodium didodecyl phosphate bilayer membrane were prepared. Permeation of NaCl from the inner aqueous phase of the coated capsule was reversibly increased by treating with Ca
2+, and decreased to the original rate by washing with EDTA from outside.
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Hayao Kobayashi, Reizo Kato, Takehiko Mori, Akiko Kobayashi, Yukiyoshi ...
1983 Volume 12 Issue 5 Pages
759-762
Published: May 05, 1983
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The crystal of α-(BEDT-TTF)
2PF
6 belongs to triclinic system (BEDT-TTF: bis(ethylenedithiolo)-tetrathiafulvalene). The close intermolecular contacts along the c axis suggests the strong tendency for the side-by-side arrangement of BEDT-TTF molecules. The electrical resistivity measurements show that α-(BEDT-TTF)
2PF
6 is a semiconductor with a small band gap of about 0.1 eV.
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Otohiko Tsuge, Shuji Kanemasa, Takayoshi Hamamoto
1983 Volume 12 Issue 5 Pages
763-766
Published: May 05, 1983
Released on J-STAGE: March 27, 2006
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A nitrogen-bridged tetravalent sulfur compound, 1,3,6-triphenylimidazo[1,2-
c]thia
IVzole, reacts with several acetylenic dipolarophiles giving excellent yields of regio- and periselective [3+2] cycloadducts to the azomethine ylide 1,3-dipole of the thia
IVzole. These cycloadducts undergo, in the presence of triethylamine, a rare desulfurization and a subsequent 10π cyclization yielding the derivatives of a new heterocyclic system, 4,9c-diazapentaleno[1,6a,6 :ab]naphthalene.
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Katsuyuki Ogura, Nobuhiro Yahata, Kimitoshi Hashizume, Koichi Tsuyama, ...
1983 Volume 12 Issue 5 Pages
767-770
Published: May 05, 1983
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Methylthiomethyl
p-tolyl sulfone was found to be one of the useful reagents for preparation of various organic compounds such as
S-methyl α-ketocarbothioates, carboxylic esters, five- and six-membered cycloalkanones, and α-methoxy-α-arylacetic esters.
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Jun-ichi Ishiyama, Yasuhisa Senda, Shin Imaizumi
1983 Volume 12 Issue 5 Pages
771-774
Published: May 05, 1983
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The products of novel reductive cyclization, 1-adamantanol and 1-methyl-2-oxa-adamantane, were obtained in the hydrogenation of 7-methylenebicyclo[3.3.1]nonan-3-one over group VIII metal black catalysts in ethanol or cyclohexane. 1-Adamantanol was produced over Pd, Rh, Co and Ni catalysts, and 1-methyl-2-oxa-adamantane only over Co catalyst in cyclohexane.
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Yumihiko Yano, Isao Yatsu, Eiichi Oya, Masashi Ohshima
1983 Volume 12 Issue 5 Pages
775-778
Published: May 05, 1983
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8-Azaflavin was synthesized for the first time, and it was found that 8-azaflavin is much more reactive (>10
4) than 3,10-dimethylisoalloxazine for oxidation of thiols in aqueous solution. Catalytic efficiency for disulfides synthesis was also examined under aerobic conditions.
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Minoru Suzuki, Etsuro Kurosawa, Akio Furusaki, Takeshi Matsumoto
1983 Volume 12 Issue 5 Pages
779-782
Published: May 05, 1983
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Three new halogenated nonterpenoid C
15-compounds have been isolated from the red alga
Laurencia venusta Yamada. The structure of (3
Z)-epoxyvenustin was confirmed by X-ray diffraction analysis. The structures of (3
Z)-venustinene containing a novel propyl side chain and (3
Z)-venustin were deduced from their spectral evidence.
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Masaaki Yamada, Shigetaka Suzuki
1983 Volume 12 Issue 5 Pages
783-784
Published: May 05, 1983
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Ultrasonically induced chemiluminescence of luminol in an aqueous alkaline solution is described for the determination of cobalt(II). This novel method is capable of detecting cobalt(II) more sensitively than any other method with a detection limit of 0.07 pg and more selectively than any other chemiluminescence method.
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Norio Koine, Teiichi Tanigaki
1983 Volume 12 Issue 5 Pages
785-788
Published: May 05, 1983
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A new isomer of [Co
III(pdta)]
−, which has a methyl group in the axial orientation, was prepared and optically resolved. The complex was characterized by spectral behaviors. The absolute configuration was determined on the basis of the circular dichroism spectrum and the equilibrium experiment.
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Haruki Niwa, Hiroyuki Ishiwata, Akio Kuroda, Kiyoyuki Yamada
1983 Volume 12 Issue 5 Pages
789-790
Published: May 05, 1983
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A new pyrrolizidine alkaloid, farfugine (
1) was isolated from
Farfugium japonicum Kitam. and the structure including absolute stereochemistry was elucidated by chemical and spectroscopic evidence.
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Tadashi Sato, Kunio Tamura, Kazuo Nagayoshi
1983 Volume 12 Issue 5 Pages
791-794
Published: May 05, 1983
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1,3-Disubstituted isoquinolines were prepared under mild conditions from allylbenzenes and nitriles using silver trifluoromethanesulfonate and iodine.
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