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Nobuyuki Ohji, Nobuhito Enomoto, Takanori Mizushima, Noriyoshi Kakuta, ...
1994 Volume 23 Issue 6 Pages
973-976
Published: 1994
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Nickel metal particles incorporated into pores formed in the anodic alumina films on an aluminium wire was applied to electrically heated catalyst for hydrogenation of 1-butene.
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Tsukasa Torimoto, Kotaro Maeda, Takao Sakata, Hirotaro Mori, Hiroshi Y ...
1994 Volume 23 Issue 6 Pages
977-980
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CdS microcrystals (Q-CdS) covalently bound with 1-decyl-1′-(3-mercapto)propyl-4,4′-bipyridinium were prepared. The surface viologen groups picked up photo-generated electrons in the conduction band of Q-CdS particles, causing a decrease of their emission. Irradiation of these particles resulted in new absorption peaks which are assigned to viologen radical cation monomers and their dimers. The photo-reduced viologen groups can mediate photo-generated electron transfer from Q-CdS to methylene blue in solution.
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Long Y. Chiang, John W. Swirczewski, Ken Liang, J. Millar
1994 Volume 23 Issue 6 Pages
981-984
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We have successfully synthesized the complex of C
60 fullerene with a three-fold symmetrical donor of 2,3,6,7,10,11-hexamethoxytriphenylene (HMT). All spectroscopic data and analyses support the chemical composition of this complex as C
60(HMT)
2. Individually, each C
60 fullerene sphere was found to be surrounded by four HMT molecules in distinctive tetrahedral arrangement. The closest distance from one C
60 centroid to the next C
60 centroid in the adjacent chain is 13.099 Å.
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Masa-aki Sato, Masao Hiroi
1994 Volume 23 Issue 6 Pages
985-988
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New hexyl-substituted oligothiophenes (sexi-, novi-, duodeci-, and quindeci-thiophenes) were prepared by a Ni(O)-catalyzed coupling reaction of a 5,5″-dibromo-3,3″-dihexyl-2,2′:5′,2″-terthiophene. The structures were determined by
1H NMR spectra, GPC data, and elemental analyses. Their π–π
* transitions were compared with those of poly(alkylthiophenes).
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Takeshi Nagasaki, Hiroyuki Fujishima, Seiji Shinkai
1994 Volume 23 Issue 6 Pages
989-992
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A tetraphenylporphyrin capped with a calix[4]arene through four chiral pillars has been synthesized. This molecule retains C
4 symmetry characteristic of porphyrins. The preliminary experiments indicated that the cavity shows unique guest-binding properties.
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Hiroshi Seto, Hiroshi Koike, Hideo Sasano
1994 Volume 23 Issue 6 Pages
993-996
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The thiosulfate-hydrogen peroxide reaction system generates thiosulfate radical anion and hydroxyl radical. When 2′-deoxyguanosine (dG) was included in the system, it was hydroxylated at the C-8 position, and the hydroxylation was markedly enhanced by addition of a trace amount of iron ion.
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anti-1,2,5,6-Tetra-tert-butyl-3,3,4,4,7,7,8,8-octaisopropyltricyclo[4.2.0.02,5]octasilane
Soichiro Kyushin, Motoo Kawabata, Yusuke Yagihashi, Hideyuki Matsumoto ...
1994 Volume 23 Issue 6 Pages
997-1000
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The title ladder polysilane was synthesized by the cross-coupling of
all-trans-[(
t-Bu)ClSi]
4 and Cl(
i-Pr)
2SiSi(
i-Pr)
2Cl with lithium in 40% yield. X-ray crystallographic analysis of the ladder polysilane shows a highly strained silicon skeleton; the Si-Si bond lengths vary from 2.412(3) to 2.481(2) Å and the Si-Si-Si bond angles of the Si
4 rings range from 87.9(1) to 90.5(1)°. By comparison of the structure and UV-visible spectra of this compound with those of the perisopropyl analog, we found that the structures and properties of ladder polysilanes are strongly affected by the substituents.
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Masaru Hashimoto, Shiro Terashima
1994 Volume 23 Issue 6 Pages
1001-1002
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The title synthesis was achieved by featuring stereocontrolled elaboration of the functionalized pyrrolidine-2-thione from 2,3,5-tri-
O-benzyl-β-
D-arabinofuranose and base-induced construction of an aziridine ring from the 5-mesyloxymethylpyrrolidine.
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Tetsuo Kondo, Masanobu Nojiri
1994 Volume 23 Issue 6 Pages
1003-1006
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Regioselectively substituted methylcelluloses having a uniform structure, 6-
O-methylcellulose, was degraded by the cellulase of
Trichoderma viride while 2,3-di-
O-methylcellulose(
2) was not. In contrast, a substrate having a trace amount of unsubstituted units in compound
2 was depolymerized by the cellulase, suggesting that glucosidic bonds between non-substituted and 2,3-di-
O-substituted units were selectively cleaved.
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Naomichi Furukawa, Takayoshi Fujii, Takeshi Kimura, Hisashi Fujihara
1994 Volume 23 Issue 6 Pages
1007-1010
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Naphthalene-1,8-dithiol reacted with aldehydes to give dithioacetals which were oxidized to 2-substituted naphtho[1,8-
de]1,3-dithiin-1-oxides (
4). 2,2-Disubstituted naphtho[1,8-
de]1,3-dithiin-1-oxides (
5) were obtained on treatment of
4 with NaH/electrophiles. Photolysis of
4 and
5 undergoes intramolecular oxygen rearrangement to generate aldehydes and ketones quantitatively together with naphthalene-1,8-dithiole.
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Tsuyoshi Fukuhara, Manabu Sekiguchi, Norihiko Yoneda
1994 Volume 23 Issue 6 Pages
1011-1012
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The fluoro-dediazoniation of ArN
2BF
4 using HF-pyridine solution has been successfully carried out either thermally or photochemically to afford the corresponding ArF in good yields. Particularly, the photochemically induced reaction in HF-pyridine was a useful tool for the preparation of ArF having polar substituents such as halogens, OH, OMe, CF
3, etc.
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Takahiro Honda, Miwako Mori
1994 Volume 23 Issue 6 Pages
1013-1016
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A novel cyclization reaction was developed using stannyl anion generated from Bu
3SnSiMe
3 and TASF (Et
3S
+Me
3SiF
2−). The reaction product was converted to the allylstannane, which was a useful intermediate for the synthesis of biologically active substances.
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Hirofumi Maekawa, Yoshio Ishino, Ikuzo Nishiguchi
1994 Volume 23 Issue 6 Pages
1017-1020
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Secondary alcohols having a carbonyl group at the neighboring carbon atom were electrochemically oxidized to the corresponding α-keto carbonyl compounds in good yields. Thus, aromatic α-hydroxyl esters were easily transformed to arylglyoxylates in excellent yields using an undivided cell while efficient anodic oxidation of α-hydroxyl ketones and aliphatic α-hydroxyl esters successfully proceeded in a divided cell to give the corresponding α-keto carbonyl compounds.
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Myung Ho Hyun, Seung-Ryul Hwang, Jae-Jeong Ryoo
1994 Volume 23 Issue 6 Pages
1021-1024
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New chiral stationary phases (CSPs) with two chiral centers were prepared from (R)- or (S)-α-naphthylethylamine and (S)-naproxen. The (R,S)-CSP prepared from (R)-α-naphthylethylamine and (S)-naproxen was found to be very successful in resolving 3,5-dinitroanilide derivatives of anti-inflammatory drugs related to α-arylpropionic acids.
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Makoto Komiyama, Tetsuro Shiiba, Teruyuki Kodama, Naoya Takeda, Jun Su ...
1994 Volume 23 Issue 6 Pages
1025-1028
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DNA hydrolysis by Ce(IV) effectively proceeds both in the presence and in the absence of molecular oxygen. Addition of hydrogen peroxide induces undesired oxidative side-reactions and suppresses the hydrolysis. Participation of molecular oxygen and hydrogen peroxide in the phosphodiester hydrolysis is ruled out, supporting the intramolecular attack by the Ce(IV)-bound hydroxide ion.
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Nobuaki Negishi, Hiromi Yamashita, Masakazu Anpo
1994 Volume 23 Issue 6 Pages
1029-1032
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The characteristics of the fluorescence spectra of Rhodamine B (RhB) doped in Si-Ti binary oxide by the sol-gel method were measured as a function of Ti-content in the binary oxides. The RhB fluorescence in the Si-Ti binary oxide was only from the excited state of the monomer when the Ti-content in the Si-Ti binary oxide was low. On the other hand, the RhB dimer fluorescence was observed when the Ti-content in the Si-Ti binary oxide was high.
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Hidekazu Honma, Hisao Murai, Keiji Kuwata
1994 Volume 23 Issue 6 Pages
1033-1036
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Photooxidation reaction of carbazole by maleic anhydride was studied by a time-resolved ESR method. Emissively spin polarized maleic anhydride anion radical and neutral carbazole N-center radical were detected. According to the CIDEP data, it is concluded that the reaction takes place through the excited triplet state of carbazole and fast deprotonation takes place from carbazole cation. This reaction is different from those of the other N-substituted carbazoles.
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Masatomi Harada, Shuichi Osawa, Eiji Osawa, Eluvathingal D. Jemmis
1994 Volume 23 Issue 6 Pages
1037-1040
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A new approach is proposed to the construction of non-carbon, fullerene-like curved moleculer surfaces. A series of saturated, multi-beamed and double-layered structures (SiC)
n (
1), each consisting of a Si
n sphere enclosing a C
n sphere with Si-C σ-bonds connecting the spheres, are studied by using AM1-SCF-MO method. (SiC)
60 appears to be the most viable species worthwhile for experimental tests.
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Yooichiroh Maruyama, Isao Shimizu, Akio Yamamoto
1994 Volume 23 Issue 6 Pages
1041-1044
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Oxidative addition of allyl halides to Ru(cod)(cot) (cod = 1,5-cyclooctadiene, cot = 1,3,5-cyclooctatriene) in the presence of trimethylphosphine at 50 °C in benzene gives Ru(η
3-allyl)(PMe
3)
3X (X = Br, Cl), which reacted with PhCHO to yield homoallylic alcohols, and with CO to afford an η
2-acyl complex, RuBr(CO)(PMe
3)
2(η
2-COCH
2CH=CH
2), and an (η
1-allyl)ruthenium(II) complex, RuBr(CO)
2(PMe
3)
2(η
1-allyl).
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Tatsuya Shono, Yoshinari Yamamoto, Katsuya Takigawa, Hirofumi Maekawa, ...
1994 Volume 23 Issue 6 Pages
1045-1048
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A radical NO
3• generated by anodic oxidation of NO
3− was found to be an effective species to the oxidation of ethers to the corresponding carboxylic acids and ketones, and this reaction was successfully applied to the synthesis of dihydrojasmone.
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Mikael Bols, Henrik C. Hansen
1994 Volume 23 Issue 6 Pages
1049-1052
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Stereocontrolled synthesis of glycosides was achieved by intramolecular glycosidation of an aglycon tethered to the 4,5 and 6 position of a thioglycoside donor.
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Toshihiro Ihara, Akiko Inenaga, Makoto Takagi
1994 Volume 23 Issue 6 Pages
1053-1056
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Polyamine-linked DNA-intercalators formed stable ternary complexes with Cu(II) and ds-DNA, some of which induced the chain cleavage of ds-DNA. The reactivity was related to the stereochemical features of the complexes.
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Tamon Okano, Nobuyuki Harada, Jitsuo Kiji
1994 Volume 23 Issue 6 Pages
1057-1060
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A new type of phosphine ligands (L) bearing quaternary ammonium as a functional group was synthesized. Their palladium complexes, PdBr
2L
2, readily underwent halogen exchange with powdered NaI under two-phase conditions, and efficiently catalyzed the fluorocarbonylation of phenyl bromide with powdered KF at atmospheric pressure of CO.
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Toshiyuki Ohtaki, Wataru Ando
1994 Volume 23 Issue 6 Pages
1061-1064
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The reaction of bis[bis(trimethylsilyl)methyl]germylene (
1) with 1,1-diazidosilanes gave siladihydrotetrazole derivative and cyclodisilazane. The structure of the latter has been confirmed by single-crystal X-ray diffraction. The similar reaction of
1 or bis[bis(trimethylsilyl)methyl]stannylene with 1,3-diazidohexamethyltrisilane furnished azatrisilacyclobutanes in quantitative yield respectively.
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Akira Ohki, Kensuke Naka, Osamu Ito, Shigeru Maeda
1994 Volume 23 Issue 6 Pages
1065-1068
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An enzyme electrode for hydrogen peroxide was developed with the aid of an easy and effective enzyme-immobilization. The enzyme electrode was made by holding an aggregate of a self-assembled amphiphilic block copolymer
1 and catalase on an oxygen electrode by use of microporous acetylcellulose membranes. The response of the electrode was linear between 4 × 10
−6 – 4 × 10
−4 M of hydrogen peroxide and remained unchanged after 50 days with over 150 measurements.
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Myun Joo Lee, Hidehiko Arai, Teijiro Miyata
1994 Volume 23 Issue 6 Pages
1069-1070
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When
t-butanol in aqueous system was decomposed by simultaneous application of γ-rays and ozone treatment, the addition of the cupric ion (Cu
2+) drastically improved the efficiency of the removal of organic substances from water. The major reason for the remarkable decrement of total organic substances is the positive catalytic effect of Cu
2+ on the oxidation of carboxylic acids.
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Junzo Nokami, Hiroyuki Matsuura, Köichi Nakasima, Satoshi Shibata
1994 Volume 23 Issue 6 Pages
1071-1074
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Palladium(0)-catalyzed reaction of 2-cyclopenten-1-yl methyl carbonate derivatives with nucleoside bases gave carbocyclic nucleosides chemo- and regioselectively under the neutral reaction conditions. The reaction was effectively used for the synthesis of (−)- and (+)-carbovir and its analogues.
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Kazumasa Funabiki, Tetsuya Ohtsuki, Takashi Ishihara, Hiroki Yamanaka
1994 Volume 23 Issue 6 Pages
1075-1078
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2,3,3-Trifluoro-1-propenyl
p-toluenesulfonate, readily available by dehydrofluorination of 2,2,3,3-tetrafluoropropyl
p-toluenesulfonate, reacted smoothly with various primary or secondary amines in the presence of triethylamine and a catalytic amount of fluoride ion at ambient temperature for 3 h or at 70 °C for 1–2 h to afford the corresponding (
Z)-α-fluoro-β-(alkylamino- or -dialkylamino)acrylaldehydes in good to excellent yields, together with the formation of
p-toluenesulfonyl fluoride.
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Mitsuo Kawasaki, Hironori Ishii
1994 Volume 23 Issue 6 Pages
1079-1082
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By bathing a smooth and highly [111]-oriented Ag film in a monomeric solution of pseudoisocyanine (1,1′-diethyl-2,2′-cyanine) bromide, we have found a uniform monolayer adsorption of self-assembled two-dimensional J-aggregate. A specific interaction of bromide ions with the Ag (111) surface seemed to be the major driving force for the dye adsorption. The system allows combined conventional spectroscopy and scanning tunneling microscopy studies of adsorbed J-aggregates of cyanine dyes.
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Yoh-ichi Matsushita, Hiroshi Furusawa, Takanao Matsui, Mitsuru Nakayam ...
1994 Volume 23 Issue 6 Pages
1083-1084
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(−)-Pyrenophorin was synthesized by the Mitsunobu reaction of (2
E,7
S)-4,4-ethylenedioxy-7-hydroxy-2-octenoic acid which has been prepared
via cobalt(II) porphyrin-catalyzed oxygenation of ethyl (2
E,4
E,7
S)-7-acetoxy-2,4-octadienoate.
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Burm-Jong Lee, Toyoki Kunitake
1994 Volume 23 Issue 6 Pages
1085-1088
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Amphiphilic tert-amines, 2-(dimethylamino)ethyl octadecyl ether(C
18ODA), 2-(dimethylamino)ethyl octadecyl ethylene glycol diether(C
18O
2DA), and 1,3-dioctadecyl-2-(2-(
N,N-dimethylamino)ethyl) glyceryl triether (2C
18O
3DA), were synthesized and employed as hydrophobic counterparts for spreading a water-soluble copoly(maleic acid-methyl vinyl ether) by polyion complexation at the air-water interface. The amines stabilized the monolayers with the order of 2C
18O
3DA > C
18ODA > C
18O
2DA >
N,N-dimethyloctadecylamine. The stabilized monolayer could be transferred on solid substrates.
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Toshiyuki Akiike, Yuichi Nagano, Yukinori Yamamoto, Asao Nakamura, Hir ...
1994 Volume 23 Issue 6 Pages
1089-1092
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Novel imidazole-appended coupled β-cyclodextrin (
6) was prepared by the condensation of 6-deoxy-6-(
L-histidylamino)-β-cyclodextrin and 6-(carboxymethylthio)-6-deoxy-β-cyclodextrin with dicyclohexylcarbodiimide. The enzyme-like activities of
6 were studied by measuring the rates for the hydrolysis reaction of some kinds of p-nitrophenyl alkanoates (C2, C3, C6, and C12).
6 showed large acceleration ability and substrate specificity for only p-nitrophenyl C6 ester.
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Takenori Kusumi, Haruko Takahashi, Toshihiro Hashimoto, Yukiko Kan, Yo ...
1994 Volume 23 Issue 6 Pages
1093-1094
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The absolute configuration of ginnol, 10-nonacosanol, has been determined by use of a new chiral anisotropic reagent, 2NMA (2-naphthylmethoxyacetic acid), which results in the marked upfield shifts of the protons located on the same side of the aromatic ring.
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Yuriko Nitta, Yoshiyuki Ueda, Toshinobu Imanaka
1994 Volume 23 Issue 6 Pages
1095-1098
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Prochiral (
E)-α-phenylcinnamic acid was hydrogenated enantioselectively over alumina- and titania-supported Pd catalysts modified with cinchonidine giving optical yields of 36.9% and 44.4%, respectively, in favor of (
S)-(+)-2,3-diphenylpropionic acid. The influence of solvent on the optical yield was significant; a water containing solvent gave the best result.
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Tateaki Wakamiya, Kunio Saruta, Jun-ichi Yasuoka, Shoichi Kusumoto
1994 Volume 23 Issue 6 Pages
1099-1102
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The Fmoc-mode solid-phase method was successfully applied to establish a practical procedure for the synthesis of phosphopeptides. Both Fmoc-phosphoserine with free phosphoric moiety and its monobenzyl phosphate derivative were examined as one of starting materials for the synthesis of peptides. The employment of the latter gave better result in respects of the yield and purity of the product than that obtained with the former.
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Junzo Nokami, Takuya Taniguchi, Shintaro Gomyô, Toshio Kakihara
1994 Volume 23 Issue 6 Pages
1103-1106
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The title compounds were prepared via the intramolecular condensation reaction of 12-[α-(p-chlorophenylsulfinyl)acetoxy]tridecanal(or dodecanal) or via the combination of inter- and intramolecular condensation of 5-[α-(p-chlorophenylsulfinyl)acetoxy]hexanal in the presence of piperidine.
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Masataka Yokoyama, Sachiko Hirano, Takeshi Hachiya, Hideo Togo
1994 Volume 23 Issue 6 Pages
1107-1110
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1,1-Diazido-2,3,4,5,6-penta-
O-benzyl-
D-glucose was refluxed in
o-xylene under argon atmosphere to give 5-[(1′
R,2′
S,3′
R-1′,2′,3′,4′-tetrabenzyloxy)butyl]tetrazole in a high yield
via an unpreceding rearrangement with one carbon shortening of sugar skeleton. In contrast its photolysis afforded two tetrazoles caused by the rearrangements without one carbon degradation; 5-[(1′
S,2′
R,3′
R,4′
R-1′,2′,3′,4′,5′-pentabenzyloxy)-pentyl]tetrazole and 1-[1′
R,2′
S,3′
R,4′
R-1′,2′,3′,4′,5′-pentabenzyloxy)pentyl]tetrazole.
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Hisao Nishiyama, Soon-Bong Park, Masa-aki Haga, Katsuyuki Aoki, Kenji ...
1994 Volume 23 Issue 6 Pages
1111-1114
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A mixture of [Ru(II)Cl
2(
p-cymene)]
2 and 6,6′-bis(oxazolinyl)-2,2′-bipyridine (Bipymox-ip) was heated in ethanol at 70 °C to produce Ru(II)Cl
2(Bipymox-ip), of which structure was clarified by X-ray analysis to show that Bipymox-ip binds as a tetradentate ligand. Its catalytic activities for transformations of diazoacetates in dimerization and cyclopropanation with styrene were examined and its spectroelectrochemistry was studied.
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Hiromasa Yamamoto, Seiji Shinkai
1994 Volume 23 Issue 6 Pages
1115-1118
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Several ionophores for the Na
+-selective electrode were developed from calix[4]arene crown ethers with a short –(CH
2CH
2O)
2CH
2CH
2– crown loop on the lower rim. The ionophoric cavities generated in these ionophores are much smaller and more rigid than those derived from calix[4]arene crown ethers with a long –(CH
2CH
2O)
3CH
2CH
2– crown loop. It was shown that
two electrodes possess Na+ selectivity (with respect to K+) exceeding a factor of 105 which is higher by more than two orders of magnitude than that of the former calix[4]arene-based Na+-selective electrodes!
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Yasuhiro Tachibana, Yoshiaki Sakurai, Masaaki Yokoyama
1994 Volume 23 Issue 6 Pages
1119-1122
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The electrochemical polymerization of thiophene was successfully performed in an organopolysilane film on an indium tin oxide (ITO) glass electrode as patterned by the Ultra-Violet (UV) light irradiation. It was demonstrated that only the UV-exposed polysilane dissolved into polar solvent such as propylene carbonate used as electrolytic solvent and hence electrochemical polymerization proceeded on the ITO electrode masked with the UV-unexposed polysilane. Fine line patterns of 10 μm width were obtained.
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Tamio Kamidate, Atsushi Ishikawa, Tadashi Segawa, Hiroto Watanabe
1994 Volume 23 Issue 6 Pages
1123-1126
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The peroxidation of luminol was performed using both Co(II) and Cu(II) as a catalyst in the presence of cysteine. A luminol chemiluminescence (CL) catalyzed by Co(II) occurred instantly from the initiation of the reaction, whereas a Cu(II)-catalyzed luminol CL suddenly appeared after a dark period. The time-resolved luminol CL were applied for the simultaneous determination of Co(II) and Cu(II).
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Sonae Kotani, Tomohiro Adachi, Toshikatsu Yoshida, Kiyotaka Onitsuka, ...
1994 Volume 23 Issue 6 Pages
1127-1130
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While treatment of bis{chloro(1,5-cyclooctadiene)platinum(II)}-μ-2,5-thienylene (
1) with bis(diphenylphosphino)alkanes, Ph
2P(CH
2)
nPPh
2, having a short methylene chain (n = 2, 3) leads to the formation of diphosphine-chelate diplatinum complexes, in the reactions of
1 with diphosphines having a long alkyl chain (n = 4, 5, 6), diphosphine-bridged diplatinum complexes were produced. The molecular structure of the complex, in which two platinum atoms are bridged by two 1,6-bis(diphenylphosphino)hexane ligands and 2,5-thienylene group, was determined by a single-crystal X-ray diffraction study.
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Ryo Iwamura, Nobuyuki Higashiyama, Kazuki Takemura, Shuji Tsutsumi, Ke ...
1994 Volume 23 Issue 6 Pages
1131-1134
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Divalent europium (Eu
2+) complexes with polymer ligands containing 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane ([2.2.2] cryptand) and 4,7,13,16,21-pentaoxa-1,10-diazabicyclo[8.8.5]tricosane ([2.2.1] cryptand) have been synthesized. The complexes emitted ca. 450 nm luminescence by ultra violet excitation. A Eu
2+-[2.2.2] cryptate-attaching polymer had high luminescence efficiency and its maximum relative emission intensity was ca. 19% with respect to an NBS standard, CaWO
4:Pb.
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Katsuhiko Iseki, Satoshi Oishi, Yoshiro Kobayashi
1994 Volume 23 Issue 6 Pages
1135-1138
Published: 1994
Released on J-STAGE: April 19, 2006
JOURNAL
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Hexafluoroacetone causes the complete reversal of stereochemistry in the aldol reaction of boron enolate derived from Oppolzer’s sultam in the absence of Lewis acids such as TiCl
4. Trifluoroacetaldehyde and 2,2-difluoro-5-phenyl-1-pentanal cause partial reversal, giving a mixture of
syn- and
anti-aldols. This finding was extended to reactions of the boron enolate with phenylglyoxal and ethyl glyoxylate.
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Itaru Hamachi, Kana Nomoto, Shigeaki Tanaka, Yusuke Tajiri, Seiji Shin ...
1994 Volume 23 Issue 6 Pages
1139-1142
Published: 1994
Released on J-STAGE: April 19, 2006
JOURNAL
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A riboflavin-appended myoglobin was successfully synthesized by the reconstitution of a chemically modified heme with apomyoglobin. Electron transfer from NADH to the heme active site was remarkably accelerated through a pendent riboflavin in the semi-artificial myoglobin.
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Teruko Yamanaka, Takanori Tano, Ken-ichi Tozaki, Hideko Hayashi
1994 Volume 23 Issue 6 Pages
1143-1146
Published: 1994
Released on J-STAGE: April 19, 2006
JOURNAL
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The lateral film conductivity along the polar head-groups and the core thickness of film have been measured on the black foam films formed from aqueous solution of 1-palmitoyl-
sn-glycero-3-phosphocholine and 1-lauroyl-
sn-glycero-3-phosphoethanolamine without and with different concentration of NaCl and CaCl
2. It is found that conductivity of each film depends on the core thickness and the type and the concentration of added electrolyte.
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Hiroshi Tamura, Hiroyoshi Mineta, Masakazu Tatsumi, Jyunichi Tanishita ...
1994 Volume 23 Issue 6 Pages
1147-1148
Published: 1994
Released on J-STAGE: April 19, 2006
JOURNAL
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Calcination and sintering of the precursor gel prepared from polyvinyl alcohol and metal nitrates gave pure YBa
2Cu
4O
8 superconductor. Using this method, pure phase of YBa
2Cu
4O
8 superconductor can be prepared in a short heat treatment time compared with the conventional method.
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