-
Yasutaka Ishii, Hiroyuki Tanaka, Yutaka Nishiyama
1994 Volume 23 Issue 1 Pages
1-4
Published: 1994
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Dramatical difference in selectivity was observed in the hydrogen peroxide oxidation of sulfides by [π-C
5H
5N
+(CH
2)
15CH
3]
3PW
12O
403− (CWP) and [π-C
5H
5N
+(CH
2)
15CH
3]
3{PO
4[W(O)(O
2)
2]
4}
3− (PCWP) under the two-phase system using chloroform as the solvent. The oxidation of sulfides with 35% H
2O
2 by CWP afforded the corresponding sulfoxides in high selectivity (93–99%), while the same oxidation by PCWP gave sulfones exclusively.
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Yusaku Sakata, Shigeya Hayashi, Ichiro Funada, Shigeaki Kasaoka
1994 Volume 23 Issue 1 Pages
5-8
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The X- and Y-type Faujasite zeolites were modified with n-hexane plasma processing followed by thermal treatment at 600 °C to produce the carbon coated zeolites. Amount of carbon coated was up to 2.8 wt% for Ca-X zeolite, depending on the time of plasma processing. Although the pore volume of the zeolites was reduced by the carbon modification, the adsorption uptake of N
2 at 30 °C increased preferentially to that of O
2 and/or Ar only for the modified X-type zeolites. The increase of the N
2 uptake was up to 150% for the Na-X zeolite at carbon coating around 1 wt%. Both H
2O–DSC and NH
3–TPD measurements supported that carbon cluster from plasma processing was present in the Faujasite cage.
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Hideyuki Nakano, Takeshi Ohno, Shoji Yamanaka
1994 Volume 23 Issue 1 Pages
9-12
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The reaction products of γ-zirconium phosphate with ethylene oxide were analyzed by solid-state
31P magic-angle spinning (MAS) NMR, and
31P and
13C solution NMR spectroscopy. γ-Zirconium phosphate can be formulated as Zr(PO
4)(H
2PO
4)·2H
2O. Ethylene oxide molecules react with the interlayer H
2PO
4 groups, forming diester derivatives of ethylene and/or diethylene glycols.
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Mao-Ching Fang, Akira Watanabe, Minoru Matsuda
1994 Volume 23 Issue 1 Pages
13-16
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New σ-π conjugated alternating silylene-diacetylene copolymers, –[(SiMe
2)
m–C≡C–C≡C]
n–, m = 1, 3, 4, and 6, were synthesized by the reaction of α,ω-dichloropermethylated oligosilanes with dilithiobutadiyne, LiC≡C–C≡CLi. The IR spectra clearly indicated the presence of diyne unit in the polymer backbone. The influence of the chain length m of the dimethylsilylene unit in the –[(SiMe
2)
m–C≡C–C≡C]
n– backbone on the optical and the electrical properties was investigated.
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Seiji Ujiie, Kazuyoshi Iimura
1994 Volume 23 Issue 1 Pages
17-20
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A chirally ionic liquid crystal (ICLC) was prepared by the complexation of L(+)-tartaric acid and an achiral mesogenic group (NLC) with an amine unit, and its liquid crystalline behavior was examined by DSC, polarizing microscopy, and X-ray techniques. Ionic ICLC formed smectic A and chiral smectic C
* phases. Due to an ionic aggregation, ionic ICLC exhibited a higher mesomorphic-isotropic phase transition temperature when compared to nonionic NLC.
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Yoshiro Hirai, Mayumi Nagatsu
1994 Volume 23 Issue 1 Pages
21-22
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The palladium-catalyzed cyclization of the optically active urethan [(−)-
1], which was obtained by enzymatic resolution of the racemic alcohol (
1), gave the piperidine
6. This reaction affords highly efficient intramolecular chirality transfer. Compound
6 was converted into (+)-coniine and 2-hydroxymethylpiperidine.
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Mitsuji Yamashita, Akihiro Yabui, Tatsuo Oshikawa, Akikazu Kakehi
1994 Volume 23 Issue 1 Pages
23-26
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Stereoselective reactions of 1-methoxy-3-phospholene 1-oxide gave a novel 1-deoxy phosphono sugar, whose relative configuration was confirmed by X-ray crystallography. Further reaction of the 1-deoxy phosphono sugar with phthalimide and 6-chloropurine produced novel phosphono sugar nucleosides.
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Takeshi Kimura, Hidetaka Nakayama, Naomichi Furukawa
1994 Volume 23 Issue 1 Pages
27-28
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l-Menthoxy sulfonium salt of 1,9-bis(methylthio)dibenzothiophene was isolated, and the structure was first determined by X-ray crystallographic analysis.
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Takashi Nogami, Katsuyuki Tomioka, Takayuki Ishida, Hajime Yoshikawa, ...
1994 Volume 23 Issue 1 Pages
29-32
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An organic radical crystal of 4-benzylideneamino-2,2,6,6-tetramethylpiperidin-1-oxyl was found to be a bulk ferromagnet, as indicated by the divergence of the ac susceptibility at 0.18 K and by the magnetic hysteresis below this temperature. The X-ray crystal structure analysis at room temperature revealed that the crystal consisted of an almost two-dimensional network of the N-O sites.
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Nobuo Kimizuka, Takayoshi Kawasaki, Toyoki Kunitake
1994 Volume 23 Issue 1 Pages
33-36
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A novel aqueous bilayer membrane that is formed from amphiphilic complexes of complementary hydrogen bond pairs provided a specific dye binding site similar to that of the conventional ammonium bilayer. Partial dissociation of the hydrogen bond pairs and the consequent component separation occurred by heating the aqueous bilayer to 80–100 °C.
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Ken-ichi Sato, Masayuki Bokura, Hironori Moriyama, Tetsutaro Igarashi
1994 Volume 23 Issue 1 Pages
37-40
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Cyclophellitol [1
L-(1,2,4,6/3,5)-1,2-anhydro-6-(hydroxymethyl)-cyclohexane-1,2,3,4,5-pentol], a novel β-glucosidase inhibitor, has been synthesized from
D-glucose via a branched-chain 6-deoxyhex-5-enopyranoside.
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Yuichi Miyazaki, Takakazu Yamamoto
1994 Volume 23 Issue 1 Pages
41-44
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π-Conjugated polythiophene having crown ethereal subunit, PCT5, reacts with metallic Na to afford a Na-doped or n-doped semiconducting material, which shows good stability against O
2 in air presumably due to strong interaction between Na
+ and the crown ethereal subunit. An ITO | PCT5 | Al electric junction serves as a light emitting diode, which starts to emit light at 6 V.
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Satoru Onaka, Mayumi Otsuka,, Atushi Mizuno, Shigeru Takagi, Katsuya S ...
1994 Volume 23 Issue 1 Pages
45-48
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Two units of -CCo
3 trinuclear cluster are systematically incorporated into various spacer molecules such as p-C
6H
4- and 1,1′-bis(diphenylphosphino)ferrocene, dppfe. X-Ray structure analysis has been made for p-[Co
3(CO)
9C]
2-C
6H
4 (
1) and [CH
3CCo
3(CO)
8]
2(μ-dppfe). Electronic interaction between two cluster units in
1 has been asserted by X-ray and absorption data.
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Masanobu Wakasa, Yoshio Sakaguchi, Hisaharu Hayashi
1994 Volume 23 Issue 1 Pages
49-50
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The photoreduction of benzophenone with thiophenol was studied by a laser flash photolysis under the magnetic fields of 0–10 T. The escape yields of the benzophenone ketyl and phenylthiyl radicals decreased with increasing magnetic field strength. The observed magnetic field effect can be interpreted by the
Δg mechanism in the case of a triplet radical pair.
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Mitsuhiro Imaizumi, Masahiko Sisido
1994 Volume 23 Issue 1 Pages
51-52
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Monoclonal antibody was raised against a tetrapeptide containing
L-pyrenylalanine. The antibody bound the tetrapeptide as well as
L-pyrenylalanine methyl ester, indicating that it recognizes the pyrenyl group. The antibody, however, did not bind
D-pyrenylalanine methyl ester. This finding suggests a potentiality of monoclonal antibodies for chiral separations.
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Takashi Morimoto, Masao Hirano, Keiko Iwasaki, Takashi Ishikawa
1994 Volume 23 Issue 1 Pages
53-54
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The title oxidation of diols with two primary hydroxy groups (symmetrical diols) and those with both a primary and a secondary hydroxy group (unsymmetrical diols) gives the corresponding lactones or the hydroxy ketones, being dependent upon the types of diols.
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Yukito Murakami, Jun-ichi Kikuchi, Tetsuya Miyajima, Yoshio Hisaeda
1994 Volume 23 Issue 1 Pages
55-58
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Supramolecular bilayer assemblies, each composed of a peptide lipid having an (
S)-alanine residue, an additional one having (
S)-binaphthol and (
S)-alanine moieties, a hydrophobic pyridoxal derivative, and copper(II) ions, mediated the aldolation of glycine with benzaldehyde to afford ß-phenylserine under mild reaction conditions, exhibiting marked enantioselectivity.
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Hiroshi Sato, Shinkichi Shimizu, Nobuyuki Abe, Ken-ichi Hirose
1994 Volume 23 Issue 1 Pages
59-62
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The catalytic activity of pentasil zeolite for the synthesis of pyridine bases from aldehydes and ammonia was found to depend upon the Si/Al ratio and the metal cation. The best choices are 30 to 120 of Si/Al ratios and metal cations such as Tl(I), Pb(II), Co(II) and Zn(II).
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Young-Ger Suh, Soon-Ai Kim, Hyun-Uk Cho, Youn-Sang Cho
1994 Volume 23 Issue 1 Pages
63-66
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cis-Bicyclo[3.3.0]octanone,
cis-hydrindanone and
cis-decalone skeletons have been efficiently constructed by intramolecular nitrile oxide-olefin cycloaddition of 1-ethenyl-2-nitroalkyl cycloalkanes or 1-ethenyl-2-hydroxyiminoalkyl cycloalkane which are readily derived from macrolactone by Funk’s Claisen rearrangement.
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Ulrich T. Mueller-Westerhoff, Gerhard F. Swiegers
1994 Volume 23 Issue 1 Pages
67-68
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The cyclic ferrocene tetramer, [1]
4ferrocenophane, may be isolated in a 2.1% yield from a reaction involving the controlled addition of FeCl
2.1.5THF to a dilute solution of the bis(cyclopentadienylmethyl)ferrocene anion.
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Yoshitaka Nishiyama, Masaya Kitamura, Sayuri Tamura, Tadashi Watanabe
1994 Volume 23 Issue 1 Pages
69-72
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Chlorophyllase was purified 13300-fold from a crude butanol extract of
Chlorella regularis. The enzyme clearly recognizes the C13
2 stereochemistry of chlorophyllous pigments in that it hydrolyzes the
a and
b (13
2R) forms but not the
a′ and
b′ (13
2S) forms. No enzyme was detected
in vivo that specifically hydrolyzes chlorophyll
a′.
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Hideaki Kita, Yunzhi Gao, Koh-ichi Ohnishi
1994 Volume 23 Issue 1 Pages
73-76
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Oxygen reduction was studied on Pt(111), Pt(100) and Pt(110) electrodes in 0.5 M H
2SO
4 and 0.1 M HClO
4 solutions. The specific adsorption of the bisulfate ion retarded the O
2 reduction on Pt(111) and slightly on Pt(100). The adsorbed hydrogen atom did not take part in the O
2 reduction. The O
2 reduction was slow on Pt(110). Innertness of the respective electrodes in a potential range of 1.0–1.23 V was discussed in term of the specific adsorption of water molecule.
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Juzo Nakayama, Ayako Mizumura, Isao Akiyama, Takehiko Nishio, Ikuo Iid ...
1994 Volume 23 Issue 1 Pages
77-80
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Tetraethylethanediselenoamide (
2) was prepared in 81% yield by reaction of tetraethylethynediamine with elemental selenium. The X-ray single crystal structure analysis revealed that two Et
2N(C=Se)– units of
2 are perpendicular to each other. The oxidation of
2 with
m-CPBA produced tetraethylmonoselenooxamide and the reaction with DMAD afforded dimethyl 4,5-bis(diethylamino)selenophene-2,3-dicarboxylate.
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Toshikazu Ibata, Girija Shankar Singh
1994 Volume 23 Issue 1 Pages
81-84
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The reaction of α-diazocarbonyl compounds with 1,1-diphenylmethanimine in the presence of Cu(acac)
2 afforded the corresponding N-substituted imines in general together with pyrrolidine and 1,4,6-dioxazocine derivatives (in the reaction of α diazo-4-chloroacetophenone) and 1,1-diphenyl-2-(4-nitrobenzoyl) ethylene (in the reaction of α-diazo-4-nitroacetophenone) through azomethine ylides.
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Shigeyasu Kuroda, Masaru Mouri, Katsuki Hayashi, Mitsunori Oda, (the l ...
1994 Volume 23 Issue 1 Pages
85-88
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The parent compound of azuleno[1,2-
a]acenaphthylene (
8) was synthesized, and its
1H NMR spectrum suggests no bond alternation in the azulene moiety. The cycloaddition of
8 with dimethyl acetylenedicarboxylate gave an acenaphthyleno[1,2-
d]heptalene derivative.
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Masamitsu Ochi, Saori Ariki, Akira Tatsukawa, Hiyoshizo Kotsuki, Yoshi ...
1994 Volume 23 Issue 1 Pages
89-92
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Four new bioactive polyacetylenes have been isolated from the marine sponge
Petrosia sp. Their structures including absolute stereochemistry have been elucidated by spectral and chemical methods.
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Robert Chênevert, Michèle Lavoie, Gabriel Courchesne, Ric ...
1994 Volume 23 Issue 1 Pages
93-96
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We report the first asymmetric synthesis of amidinomycin, an antiviral antibiotic metabolite. Amidinomycin of high enantiomeric purity (ee 91%) was prepared from norbornylene in 8 steps. The key step is an enzymatic discrimination of enantiotopic groups in meso cis-1,3-dicarbomethoxycyclopentane or in meso cis-cyclopentane-1,3- dicarboxylic acid anhydride.
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Shu Kobayashi, Shinji Suda, Masaaki Yamada, Teruaki Mukaiyama
1994 Volume 23 Issue 1 Pages
97-100
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In the presence of a catalytic amount of [(R)-1,1′-bi-2-naphthalenediolato(2-)-O,O′]oxotitanium, silyl enol ethers of thioesters reacted with α,β-unsaturated ketones to afford the corresponding Michael adducts (1,5-dicarbonyl compounds) in high yields with moderate to high enantiomeric excesses.
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Tsutomu Mizuta, Atsushi Uchiyama, Kazumasa Ueda, Katsuhiko Miyoshi, Ha ...
1994 Volume 23 Issue 1 Pages
101-104
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An extraordinarily high separation factor, amounting approximately to 7, was attained in the title system, where only the Λ enantiomer is strongly associated with the
Δ-
ob3 isomer on the resin. The efficiency is explained in terms of the linearity of the triple hydrogen-bonds formed between the three lone-pairs of
fac-[Co(β-ala)
3] and the three N-H groups of the
Δ-
ob3-[Co{(+)-chxn}
3]
3+.
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Li Fan, Kaoru Fujimoto
1994 Volume 23 Issue 1 Pages
105-108
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Pd/La
2O
3 catalyst reduced by flowing hydrogen at 500 °C for 1 h was found to be a promising catalyst for hydrogenation of CO
2 to methanol. At 230 °C and 30 bar, the CO
2 conversion was 4.8% while methanol selectivity reached 82.7% with extremely high durability, even if the composition of reactant gas was CO
2 : H
2 = 1 : 3.
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Akira Hanaki, Hiromitsu Sago
1994 Volume 23 Issue 1 Pages
109-112
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Stopped-flow kinetic studies have been done on the ligand-exchange of Cu(II) complexes of polyaminopolycarboxylate (EDMA, EDDA, EDDP, EDTA and EDTPO) with penicillamine to yield Cu(II)-bis(penicillamine). The reaction consists of two steps and the transient which is a ternary complex has been characterized. A fairly good correlation existed between the stability constants of the mother complexes and the rate constants of ligand-exchange.
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Tamio Kamidate, Masaki Katoh, Tadashi Segawa, Hiroto Watanabe
1994 Volume 23 Issue 1 Pages
113-116
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A highly sensitive chemiluminescence (CL) method was developed for the determination of ascorbic acid (AA) based on the conversion of AA to hydrogen peroxide (H
2O
2) in a cationic reverse micellar hexadecyltrimethylammonium chloride : chloroform medium. AA was indirectly determined by measuring the H
2O
2 generated by the peroxyoxalate CL method. The CL intensity was linearly correlated with AA concentration over the range from 5.0 × 10
−8 to 1.0 × 10
−6 M.
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Yoshinari Baba, Hiroyuki Hirakawa, Yoshinobu Kawano
1994 Volume 23 Issue 1 Pages
117-120
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2-Thienylchitosan and 3-(methylthio)propylchitosan were newly synthesized by crosslinking the corresponding Schiff base derivative before reducing it so that the adsorptive activity was not lowered by the crosslinking. These chitosan derivatives selectively adsorbed gold(III), palladium(II) and platinum(IV) over base metals from hydrochloric acid.
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Tsutomu Inokuchi, Liu Ping, Fumihiro Hamaue, Miyoko Izawa, Sigeru Tori ...
1994 Volume 23 Issue 1 Pages
121-124
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The electrochemical Wacker type oxidation of terminal olefins by using palladium chloride or palladium acetate and tri(4-bromophenyl)amine as a recyclable mediator in either a divided cell or an undivided cell afforded the corressponding methyl ketones in good yields.
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Michinori Takeshita, Seiji Shinkai
1994 Volume 23 Issue 1 Pages
125-128
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Pyrene functionalized homotrioxacalix[3]arenes selectively recognize primary ammonium ions detected by an intramolecular excimer fluorescence change of
partial cone conformer. This is a novel sensing system for primary ammonium ions.
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Ken-ichi Sato, Tomoyuki Miyata, Ikuo Tanai, Yasuchika Yonezawa
1994 Volume 23 Issue 1 Pages
129-132
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Horner-Wittig reactions of 4-
O-benzyl-2,3:5,6-di-
O-isopropylidene-
D-mannose and 2,3,4,5,6,7-hexa-
O-benzyl-6-
D-
glycero-2,3,4,5-
D-
galacto-heptose with methyl 2-benzyloxycarbonylamino-2-(diethoxyphosphoryl)acetate gave the corresponding α-dehydroamino acid derivatives in good yields, respectively. They were converted to methyl 3-deoxy-4,5:7,8-di-
O-isopropylidene-α-
D-
manno-2-octulopyranosonate and methyl (methyl 3-deoxy-
D-
glycero-β-
D-
galacto-2-nonulopyranosid)onate via methyl α-oxoalkanoate derivatives.
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Dock-Chil Che, Toshio Kasai, Hiroshi Ohoyama, Keiji Kuwata, Mitsuhiko ...
1994 Volume 23 Issue 1 Pages
133-136
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The fluorescence excitation spectra of CN(A,B → X) and CF
3(2A′
1 → 1A″
2) and the quantum yield for the CN(B) radical formation were measured in the photodissociation of CF
3CN in 105–135 nm. The quantum yield for the CN(B) radical formation was found to be only a few percent. The similarity in the excitation energy dependence of CN(B → X) and of CN(A → X) indicated a common dissociation mechanism via the 3s Rydberg state of CF
3CN for both states.
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Kazunori Nakano, Kazuki Sada, Mikiji Miyata
1994 Volume 23 Issue 1 Pages
137-140
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Cholic acid was found to form crystalline inclusion compounds with various hydrocarbons and related compounds. Some alcohols do not form inclusion crystals at all, but serve as solvents. The crystal structure of a 1 : 1 inclusion compound of cholic acid with benzene was determined. Comparative studies on inclusion behaviors of cholic acid and deoxycholic acid are now possible.
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Patrick Martin, Jacques Yves Conan, Benali Harmouch, Denis Postel, Gin ...
1994 Volume 23 Issue 1 Pages
141-144
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We have synthesized a series of non-glycosidically linked di- and trisaccharide monoethers of the type (3-5)-
D-xylan, by a one-pot reaction between the alcohol ROH and 3,5-anhydro-l,2-
O-isopropylidene-α-
D-xylofuranose, in the presence of KOH and toluene-DMSO at 80 °C.
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Eiji Wada, Hiroshi Yasuoka, Shuji Kanemasa
1994 Volume 23 Issue 1 Pages
145-148
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(
E)-2-Oxo-1-sulfonyl-3-alkenes as new hetero 1,3-dienes undergo smooth hetero Diels-Alder reactions with vinyl ethers in the presence of Eu(fod)
3 or TiCl
2(
i-PrO)
2. The reactions are absolutely
endo-selective producing 2,4-
cis-3,4-dihydro-2
H-pyrans in excellent yields, sufficient catalytic cycles being attained. The sulfonyl-stabilized carbanions derived from the cycloadducts are alkylated followed by reductive desulfonylation.
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Toshiyuki Tamai, Kazuhiko Mizuno, Isao Hashida, Yoshio Otsuji, Akito I ...
1994 Volume 23 Issue 1 Pages
149-152
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Physical and chemical properties of radical cations generated from Ar
2C=CH(CH
2)
nCH=CAr
2 (Ar = 4-CH
3OC
6H
4, n = 2–4) were studied by use of pulse radiolysis and γ-radiolysis techniques. When n = 3 and 4, 1,4-radical cations were formed via intramolecular cyclization of initially formed radical cations. The 1,4-radical cations were trapped by molecular dioxygen at the diarylalkylmethyl radical site, which suggests the “distonic” character of the species.
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Takashi Hiraga, Norio Tanaka, Naoto Kikuchi, Kikuko Hayamizu, Tetsuo M ...
1994 Volume 23 Issue 1 Pages
153-156
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An association of 3,3′-Diethyloxadicarbocyanine Iodide (DODCI) in saturated solutions has been investigated by means of small angle X-ray scattering (SAXS),
1H-NMR spectroscopy and photo-emission spectroscopy. In the investigation by SAXS, we have revealed that DODCI molecules in a saturated acetone solution exhibit an association with an average diameter of 4.5 nm, which is reasonably supported by
1H-NMR spectroscopy and we could fairly well understand the structural hierarchy acting in the formation of the association.
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Kunisuke Okada, Toshiyuki Katsura, Hideo Tanino, Hisae Kakoi, Shoji In ...
1994 Volume 23 Issue 1 Pages
157-160
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The construction of a chiral building block with a quaternary carbon center is described, based on the Lewis acid-catalyzed acyl migration of α,β-epoxy ketone with alkyl and alkenyl substituents.
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Mineo Sato, Tetsuro Jin, Hirokazu Ueda
1994 Volume 23 Issue 1 Pages
161-164
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The chemical lithium intercalation of a layered perovskite LiLaNb
2O
7 compound has been performed by using
n-butyllithium. The content of inserted lithium ions was found to be
ca. 1 mol per unit formula. The crystal structure of the intercalated compound was determined by the powder X-ray diffraction pattern. An unusual contraction of the cell volume inherent in the intercalation reaction was observed.
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Masafumi Hirano, Miwa Hirai, Yuji Ito, Atsushi Fukuoka, Sanshiro Komiy ...
1994 Volume 23 Issue 1 Pages
165-166
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Rhenium(I) enolate complexes Re(NCCHCO
2Et)[NC(EtO
2C)C=CHPh](PMe
2Ph)
4 and Re(NCCHCO
2Et)(NCCH
2CO
2Et)(PMe
2Ph)
4 are found to catalyze unique olefin metathesis reaction of tetracyanoethylene with ethyl α-cyanocinnamate to give 1,1 dicyano-2-phenylethylene and ethyl 2,3,3-tricyanopropenoate at room temperature.
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Yong Wang, Akihiko Ueno, Fujio Toda
1994 Volume 23 Issue 1 Pages
167-170
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A cyclodextrin heterodimer, which has α- and β-cyclodextrin units as two different receptor sites, was prepared. It showed cooperative and site-specific binding to isoamyl
p-dimethylaminobenzoate with the alkyl group included in the β-cyclodextrin cavity while dimethylaminobenzene moiety partially included in the α-cyclodextrin cavity. This binding mode was substantiated by the fact that the TICT emission of this guest is greatly enhanced by the cyclodextrin heterodimer.
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Farooque MD. Akhter, Masaaki Kojima, Toshihito Yoshii, Setsuo Kashino, ...
1994 Volume 23 Issue 1 Pages
171-174
Published: 1994
Released on J-STAGE: April 14, 2006
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On photolysis of
trans(
t-N,S)-[Co{S(O)
2CH
2COO-
S,
O}(tren)]
+ with visible light, both linkage isomerization (sulfinato-
S to sulfinato-
O) and geometrical isomerization (
trans to
cis) took place to yield
cis(
t-N,O(S))- and trans(
t-N,O(S))-[Co{OS(O)CH
2COO-
O,
O}(tren)]
+ (O(S) = oxygen of sulfinate group).
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Akio Yoneda, Tadao Hakushi, George R. Newkome, Yukio Morimoto, Noritak ...
1994 Volume 23 Issue 1 Pages
175-176
Published: 1994
Released on J-STAGE: April 14, 2006
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Tow novel
C-metalated Pd(II) complexes containing diethylmalonate pendants have been prepared. A single crystal X-ray structure analysis of C
26H
30N
2O
5Pd reveals that two molecules are adjoined and exactly oriented face to face due to intra- and inter-molecular hydrogen bonds. The structural evidence was also observed in solution from the
1H NMR spectroscopy.
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Nobuyuki Imai, Hideyo Takahashi, Susumu Kobayashi
1994 Volume 23 Issue 1 Pages
177-180
Published: 1994
Released on J-STAGE: April 14, 2006
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A chiral disulfonamide-alkylaluminum complex prepared from (1
R,2
R)-
N,
N′-bis(benzenesulfonyl)-1,2-cyclohexanediamine and trialkylaluminum or
i-Bu
2AlH has been found to catalyze a Simmons-Smith cyclopropanation of allylic alcohols with Et
2Zn and CH
2I
2 to afford the corresponding cyclopropanes in excellent yields with high enantiomeric excesses.
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Yoshinari Baba, Yoshinobu Kawano
1994 Volume 23 Issue 1 Pages
181-184
Published: 1994
Released on J-STAGE: April 14, 2006
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Copper phthalocyanine derivative was proposed as a new affinity ligand for the separation and purification of proteins. The adsorption equilibria of lysozyme, albumin and hemoglobin were studied with the affinity gel prepared by immobilizing its ligand to gel beads. The affinity gel was found to be highly selective for hemoglobin over albumin and lysozyme.
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