-
Kingo Uchida, Masahiro Irie
1995 Volume 24 Issue 11 Pages
969-970
Published: 1995
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1,2-Bis(3,5-dimethyl-2-thienyl)perfluorocyclopentene which shows a reversible color change from colorless to yellow by UV irradiation was synthesized. The color of the photogenerated closed-ring forms was dependent on the substitution position of the thiophene rings to the perfluorocyclopentene moiety.
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Jun Takeda, Mitsuo Sato
1995 Volume 24 Issue 11 Pages
971-972
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UV-vis absorption spectra of nonplanar dodecaphenylporphyrin H
2DPP show a strong solvent dependence caused by the hydrogen-bonding interactions of pyrrole NH protons and pyrrolenine nitrogen lone pairs with solvent molecules.
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Wei Liang, Hiroo Nakahara
1995 Volume 24 Issue 11 Pages
973-974
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The morphologies in monolayers of tetraphenylporphyrin derivatives with four fluorocarbon chains have been observed
in situ on the water surface by a Brewster angle microscope (BAM). It has been suggested that the homogeneity of the monolayers depends upon the chain length of substituents for the porphyrin derivatives and in the case of the shorter chain the nucleation and the process of growing crystallines in the monolayers can be clearly observed at zero surface pressure or on compression.
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Takahiko Akiyama, Naofumi Horiguchi, Tomoaki Ida, Shoichiro Ozaki
1995 Volume 24 Issue 11 Pages
975-976
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The TiCl
4 or SnCl
4 mediated Diels-Alder reaction of cyclopentadiene and chiral acryloyl ester derived from chiral cyclitols proceeded with excellent diastereoselectivity in Et
2O via re-face attack of the acrylates. In contrast, interesting changeover of the diastereofacial selectivity was observed by use of toluene or hexane as a solvent to afford the cycloadducts derived from si-face attack of the acrylates.
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Keiji Okada, Hidekazu Sakai, Masaji Oda, Koichi Kikuchi
1995 Volume 24 Issue 11 Pages
977-978
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Intramolecular energy transfer from the second triplet of anthracene moiety is exemplified in the cis to trans isomerization of methyl maleate and the valence isomerization of norbornadiene to quadricyclane by stepwise two-color two-photon excitation method.
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Katsuyoshi Ikeda, Hideki Sakai, Ryo Baba, Kazuhito Hashimoto, Akira Fu ...
1995 Volume 24 Issue 11 Pages
979-980
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We employed a Pd-loaded TiO
2 film as a simple model for the metal-deposited photocatalyst and carried out spatial mapping of reaction products formed by the photocatalytic reactions in a Fe(CN)
63−⁄4− aqueous solution using a microelectrode. The experimental data were simulated with a diffusion model solved by the finite difference method. The results indicate that the spatial resolution of ca. 70 μm can be obtained with a distance of 30 μm between the sample surface and the microelectrode.
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Takao Okazaki, Toshikazu Kitagawa, Ken’ichi Takeuchi
1995 Volume 24 Issue 11 Pages
981-982
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Ionization of 3,4-dimethyl-4-homoadamantanol with FSO
3H/SbF
5 in SO
2ClF irreversibly afforded the 3-ethyl-5-methyl-1-adamantyl cation (
9) at −30 °C, which was directly observed by
13C NMR. Trapping of
9 with methanol gave the corresponding methyl ether in 71% yield, suggesting that the acid-isomerization of 3,4-dialkyl-4-homoadamantanols may be conveniently used for preparation of 1,3-dialkyladamantane derivatives.
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Youichi Ishii, Masayuki Kawaguchi, Masanobu Hidai
1995 Volume 24 Issue 11 Pages
983-984
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Reaction of [NBu
4][W(CN)(N
2)(dppe)
2] with [RuCp(η
6-
p-FC
6H
4R)][PF
6] gave novel μ-aryl isocyanide complexes [WF{CN(η
5-
p-C
6H
4R)RuCp}(dppe)
2] (
3) through the arylation of the CN ligand concurrent with the loss of the dinitrogen ligand. The X-ray crystallographic study of
3a (R = H) revealed the unusual η
1:η
5-μ
2-coordination of the phenyl isocyanide behaving as an iminocarbyne-cyclohexadienyl ligand.
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Toshihiko Hikida, Kiyotaka Onitsuka, Kenkichi Sonogashira, Tamio Hayas ...
1995 Volume 24 Issue 11 Pages
985-986
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Reaction of
cis-PtMe(SiPh
3)(PMe
2Ph)
2 (
1) with phenylacetylene in benzene readily proceeds at room temperature to give the acetylene-insertion product
cis-PtMe{C(Ph)=CH(SiPh
3)}(PMe
2Ph)
2, while
trans-PtMe(SiPh
3)(PMe
2Ph)
2 (
2), which is the geometrical isomer of
1, is inactive toward acetylene-insertion. A mechanism of insertion involving a five-coordinate intermediate is proposed to account for the marked difference in the reactivity between the cis and trans isomers.
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Noriyoshi Arai, Koichi Narasaka
1995 Volume 24 Issue 11 Pages
987-988
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α-Nitroalkyl radicals are generated by oxidation of nitronate anions with cerium(IV) ammonium nitrate. When the reactions are carried out in the presence of electron-rich olefins, such as silyl enol ethers, intermolecular addition of the radicals proceeds to afford β-nitroketones, which are further converted to α,β-unsaturated ketones in good yield.
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Takumi Konno, Yukie Yoshinari, Ken-ichi Okamoto
1995 Volume 24 Issue 11 Pages
989-990
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The reaction of [Ni(aet)
2] (aet = 2-aminoethanethiolate) with [PtCl
2(bpy)] (bpy = 2,2′-bipyridine) in water led to the geometrical conversion of Ni
II from square-planar to octahedral, giving a novel S-bridged Pt
IINi
II complex, [Pt(bpy){Ni(aet)
2(H
2O)
2}]
2+ (
1).
1 readily reacted with bpy in water to produce [Pt(bpy){Ni(aet)
2(bpy)}]
2+ (
2), of which structure was determined by X-ray crystallography.
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Sei Masatoki, Motomu Takamura, Hiroatsu Matsuura, Keiji Kamogawa, Teiz ...
1995 Volume 24 Issue 11 Pages
991-992
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The Raman spectra of aqueous solutions of CH
3(OCH
2CH
2)
mOCH
3 (
m = 1−4) were measured for mole fractions down to 0.005. The spectral observation for the compounds with
m ≥ 2 indicates that, on addition of water, the POE chain progressively prefers the
gauche conformation for the OCH
2–CH
2O segment at the first stage, but this direction of the conformational preference is reversed for concentrations lower than a particular solution composition. This anomalous conformational behavior is suggestive of a new structural aspect of the POE–water system.
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Hitoshi Takeshita, Qian Fan Wang, Kanji Kubo, Akira Mori
1995 Volume 24 Issue 11 Pages
993-994
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1-(Tropon-2-yl)-1-aza-l5-crown-5 ether and 1-(7-bromotropon-2-yl)-1-aza-15-crown-5 ether were prepared by condensation of 1-aza-15-crown-5 ether and appropriate derivatives. Spectrophotometric titration of the 1:1-complexes of these crown derivatives showed a preferential complexation with lithium salt over other alkali metal salts. Thus, structural modification by capping with tropone system altered the selectivity.
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Munehiro Nakatani, Ruo Chun Huang, Hiroaki Okamura, Tetsuo Iwagawa, Ke ...
1995 Volume 24 Issue 11 Pages
995-996
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A new limonoid of biogenetic interest, salannal, was isolated along with salannin and nimbolinin B from the root of
M. azedarach L. and the structure was elucidated by spectroscopic means.
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Tadashi Okuyama
1995 Volume 24 Issue 11 Pages
997-998
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Ring opening of dibenzo-1,2-oxathiin 2-oxide (
1a) and 3,4-dihydro-1,2-benzoxathiin 2-oxide (
1b) is accelerated by buffer bases while that of 3
H-2,1-benzoxathiole 1-oxide (
1d) is essentially independent of buffer concentrations in tertiary amine buffers or decelerated in some buffers. These results are taken as evidence for the hypervalent intermediate of this reaction.
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Norikazu Miyoshi, Tomohiro Fukuma, Makoto Wada
1995 Volume 24 Issue 11 Pages
999-1000
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In the presence of bismuth trichloride and metallic zinc, α-diketones react with aldehydes in THF under reflux to afford the corresponding α,β-dihydroxyketones in moderate to good yields. It was also found that the present reaction proceeds smoothly by using a catalytic amount of bismuth trichloride to give the corresponding adducts. The present reaction takes place even in aqueous media.
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Minoru Sakurai, Hirohisa Tamagawa, Takao Furuki, Yoshio Inoue, Katsuhi ...
1995 Volume 24 Issue 11 Pages
1001-1002
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A multidielectric model combined with quantum chemical calculation was applied to interpretate intermolecular binding at the lipid-water interface. The calculation well reproduced the observed binding energy between guanidium cation and AMP.
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Bunpei Hatano, Yoshikazu Haraguchi, Sinpei Kozima, Ryohei Yamaguchi
1995 Volume 24 Issue 11 Pages
1003-1004
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Nucleophilic addition reactions of allylic tin reagents to chiral 3-substituted 3,4-dihydroisoquinolines activated by acyl chlorides afford anti 1,3-disubstituted 1,2,3,4-tetrahydroisoquinolines stereoselectively through high 1,3-asymmetric induction.
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Masaaki Okazaki, Yasuro Kawano, Hiromi Tobita, Shinji Inomata, Hiroshi ...
1995 Volume 24 Issue 11 Pages
1005-1006
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Photolysis of chloro(hydrido)(silyl)iridium complex [Ir(Cl)(H){HMesSi(CH
2)
2PPh
2}(PMe
3)
2] (
1) caused the geometric isomerization to
2 which reached to a photostationary state with the ratio of
1 :
2 = 29 :71. Both
1 and
2 take
mer configuration, but
1 has a hydrido ligand opposite to one of PMe
3’s while
2 has that opposite to the PPh
2. On thermolysis,
2 reverted to
1 quantitatively.
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Jun Matsui, Yoko Miyoshi, Toshifumi Takeuchi
1995 Volume 24 Issue 11 Pages
1007-1008
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Polymers molecularly imprinted against a herbicide prometryn were prepared using (2-trifluoromethyl)acrylic acid (TFMAA) as a new monomer to construct complementary binding sites within the polymers. In chromatographic studies, the polymers with TFMAA exhibited higher affinity and selectivity for the template prometryn than those prepared with a conventional monomer methacrylic acid (MAA).
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Shim Sung Lee, Jung Min Park, Dae Yeon Kim, Jong Hwa Jung, Moon Hwan C ...
1995 Volume 24 Issue 11 Pages
1009-1010
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A series of mono- to quadru-podand having same arms were synthesized and thermodynamic parameters for the complexation with Ag(I) in methanol have been determined. All of the podands except mono-podand form 1:1 complexes with Ag(I) definitely and the complexation was enthalpy driving. Binding characteristics were also examined by NMR and solvent extraction.
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Shigeru Sasaki, Masahiko Iyoda
1995 Volume 24 Issue 11 Pages
1011-1012
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A series of di-, tri-, tetra-, and pentaamines were synthesized as precursors for corresponding di-, tri-, tetra-, and penta(aminium radical-cations) by the aryl-N bond formation reaction between aryl iodides and
in situ prepared copper amide in refluxing pyridine. Cyclic voltammograms of
meta-connected derivatives consisted of irreversible waves which imply side reactions in addition to oxidation to aminium radical-cations.
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Tamotsu Fujisawa, Ryuuichirou Hayakawa, Makoto Shimizu
1995 Volume 24 Issue 11 Pages
1013-1014
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A straightforward synthetic route of lβ-methylcarbapenem precursor is established by hydrogenolysis-isomerization-reduction process of propargyl acetate or by regio- and stereoselective hydrogenation process of dienyl ester with complete stereoselectivity.
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Hisanori Takashima, Shigeki Jin, Midori Yoshida, Jiro Abe, Akio Murai
1995 Volume 24 Issue 11 Pages
1015-1016
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A metabolite has been isolated from winter wheat leaves inoculated with H
2O
2 and its structure was elucidated from the spectral data.
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Kiyohiko Nakajima, Yuki Ando, Masahiko Inamo, Masaaki Kojima
1995 Volume 24 Issue 11 Pages
1017-1018
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The kinetics of the electron-transfer reaction between [VO{3-MeOsal-(
RR) or (
SS)-chxn}] and [VO{sal-(
RR)-chxn}]
+ were studied using the stopped-flow method in acetonitrile over the temperature range of 5 – 25 °C. The reactions were enantioselective. The ratio of the rate constant of the electron-transfer between [VO{3-MeOsal-(
SS)-chxn}] and [VO{sal-(
RR)-chxn}]
+ (
kSS-RR) and that between [VO{3-MeOsal-(
RR)-chxn}] and [VO{sal-(
RR)-chxn}]
+ (
kRR-RR) was 2.0 (
kSS-RR /
kRR-RR) at 25 °C.
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Kiyotaka Onitsuka, Hiroshi Urayama, Kenkichi Sonogashira, Fumiyuki Oza ...
1995 Volume 24 Issue 11 Pages
1019-1020
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The treatment of 2-furanylplatinum with maleic anhydride (MA), tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ) results in insertion of the olefins into the C–H bond of furanyl group at the 5-position. 2-Thienylplatinum complex similarly reacts with TCNE and TCNQ to give the insertion products.
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Masatoshi Hirayama, Toshitaka Terasaka, Yoichi Morita, Takanori Suzuki ...
1995 Volume 24 Issue 11 Pages
1021-1022
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A large
77Se hfs was observed in the ESR spectrum of a radical generated by photoreduction of the electron acceptor, BSDA-TCNQ(
3), with 355 nm laser irradiation in methanol. This spectrum was identified as the anion radical of a proton adduct of
3, which was supported by the MO calculation.
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Tetsuya Osaka, Shin-ichi Komaba, Kenichiro Fujihana, Naoki Okamoto, No ...
1995 Volume 24 Issue 11 Pages
1023-1024
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By using electropolymerized poly(3-n-octylthiophen) (PAT8) film as a hole transporting layer, the light-emission of an organic electroluminescence layer of poly(N-vinylcarbazole) dip-coating layer doped with 2,5-bis(1-naphthyl)-1,3,4-oxadiazole and 3-(2′-benzothiazolyl)-7-diethylaminocoumarin, was remarkably enhanced as compared with the layer without PAT8 layer. The addition of the hole transporting layer made the turn-on bias reduce and the emission intensity increase to be 600 cd m
−2.
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Junzo Nokami, Akito Taniguchi, Masayuki Honda, Satoshi Fukutake
1995 Volume 24 Issue 11 Pages
1025-1026
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The title compounds were prepared by the reaction of diethyl (arylsulfinylmethyl)phosphonate with aldehydes in the presence of piperidine in aceto(or propio)nitrile.
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Katsuji Ito, Miwa Yoshitake, Tsutomu Katsuki
1995 Volume 24 Issue 11 Pages
1027-1028
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A mixture of optically active 3-substituted
cis- and
trans-tetrahydrofuran-2-carboxylates which was prepared in one step from readily available (±)-2-alkynyloxetane, was converted into
trans-whisky lactone (
2) in a straightforward manner.
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Kobayashi Shu, Mineko Horibe
1995 Volume 24 Issue 11 Pages
1029-1030
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Both enantiomers of 2-methyl-3-hydroxythioesters have been synthesized in chiral tin(II) Lewis acid-mediated aldol reactions of silyl enolate
3 with aldehydes, by simply choosing similar types of chiral sources,
4 and
5, derived from
L-proline.
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Guiscard Glück, Yukihisa Okumura, Junzo Sunamoto
1995 Volume 24 Issue 11 Pages
1031-1032
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A direct reconstitution method, possibly under non-denaturing conditions, was developed to study membrane protein-lipid monolayer at the air/water interface. Proteins were first transferred from intact human erythrocytes or ghosts to liposomes, which spontaneously transformed at the air/water interface. Then, by using the wet-bridge method, a stable protein containing monolayer by means of surface pressure/area diagrams was formed that exhibited erythrocyte acetylcholinesterase activity.
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Mitsuo Sato, Hirofumi Uehara, Eiji Kojima, Michihiro Miyake
1995 Volume 24 Issue 11 Pages
1033-1034
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A formation of complete solid solution series of Si, Al in the sodalite framework was tried in a non aqueous solution. Two types of solid solutions could be successfully prepared. The one was in the region of Si/Al ratio from ∞ to 1.4, and the other from 2.0 to 1.0. The former was assigned as type A, while the other type B. Their X-ray powder diffraction, thermoanalysis and
29Si NMR data were characterized.
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Ian A. Nicholls
1995 Volume 24 Issue 11 Pages
1035-1036
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Thermodynamic considerations relevant to molecularly imprinted polymer (MIP) preparation and non-covalent interaction based ligand recognition are presented. Together with the description of a semi-quantitative approach to recognition analysis, adapted for MIPs, thermodynamically based principles for MIP design are discussed.
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Kensuke Naka, Noriaki Kitano, Kaoru Iwaki, Akira Ohki, Shigeru Maeda
1995 Volume 24 Issue 11 Pages
1037-1038
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The amount of adsorbed catalase at silica-gel in aqueous solution at pH 7.0 was significantly increased in a presence of the polymer aggregate which was prepared from an amphiphilic block copolymer (
1) consisting of poly[(N-pentanoylimino)ethylene] and poly[(
N-acethylimino)ethylene].
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Hirohiko Houjou, Minoru Sakurai, Naoki Asakawa, Yoshio Inoue, Yusuke T ...
1995 Volume 24 Issue 11 Pages
1039-1040
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Ab initio calculation was performed to appreciate
13C NMR chemical shift variations of 11-
cis-retinal. The results show that isotropic shift of C12 varies significantly as the C12-C13 single bond rotates. This factor seems to be important to discuss a state of the chromophore in the protein.
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Takashi Ogata, Didarul A. Chowdhury, Satsuo Kamata, Yoshiharu Usui, Ko ...
1995 Volume 24 Issue 11 Pages
1041-1042
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Membrane-coated carbon rod electrodes were constructed by incorporating 1,4-bis(3-thiapentylxanthato)butane as the active ionophore. These electrodes exhibited near Nernstian responses with a slope of 19.7 mV per decade of concentration change, toward samarium(III) ion. The observed detection limit for determination of Sm(III) was 5 × 10
−7 M (1M = 1 mol dm
−3) in aqueous solutions. The selectivity coefficients of the electrode against a number of diverse ions are discussed.
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Yoshihide Matsuo, Minoru Suzuki, Michio Masuda
1995 Volume 24 Issue 11 Pages
1043-1044
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The structure of a novel brominated triterpenoid, designated enshuol, from the red alga
Laurencia omaezakiana Masuda sp. ined. (Enshu-sozo) was elucidated by spectroscopic analysis and chemical reactions of a degradation product.
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Minoru Suzuki, Yoshihide Matsuo, Yoshinori Takahashi, Michio Masuda
1995 Volume 24 Issue 11 Pages
1045-1046
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Callicladol, a novel brominated metabolite has been isolated from
Laurencia calliclada Masuda sp. ined., a Vietnamese species of the red algal genus
Laurencia. Its structure was deduced from spectral and chemical evidence.
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Hiroshi Uyama, Hirofumi Kikuchi, Shiro Kobayashi
1995 Volume 24 Issue 11 Pages
1047-1048
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Polyester macromonomers bearing a polymerizable methacryloyl or 10-undecenolyl group at the chain end were synthesized by the lipase-catalyzed ring-opening polymerization of 12-dodecanolide in the presence of a vinyl ester having the corresponding polymerizable group.
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Li-Hua Gao, Ke-Zhi Wang, Chun-Hui Huang, Xin-Sheng Zhao, Xiao-Hua Xia, ...
1995 Volume 24 Issue 11 Pages
1049-1050
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A series of lanthanoid complexes (
E)-1-ferrocenyl-2-(
N-hexadecylpyridinium-4-yl)ethylene tetrakis(dibenzoylmethanato)lanthanoides(III) (La, Nd, Dy and Yb) have been newly synthesized for second-order nonlinear optical LB materials. The monolayer behaviors at the air-water interface, ultraviolet spectra and second-harmonic generation (SHG) of the films have been reported. The values of second-order molecular hyperpolarizability β of the complexes were estimated to be (1.37–1.58) × 10
−28 esu.
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Atsutaka Kunai, Osamu Ohnishi, Tomohiro Sakurai, Mitsuo Ishikawa
1995 Volume 24 Issue 11 Pages
1051-1052
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Electrolysis of iodosilanes with Al/Pt electrodes in pivalonitrile results in the formation of the Si–Si bonds to give the corresponding disilanes. On the other hand, the electrolysis of various halosilanes such as iodo-, chloro-, and fluorosilanes with Pt/Pt electrodes in the presence of phenylacetylene leads to the formation of the Si–
sp-carbon bonds to give phenylethynylated products.
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Seiji Kosemura, Hideyuki Emori, Shosuke Yamamura, Toyoaki Anai, Hiroko ...
1995 Volume 24 Issue 11 Pages
1053-1054
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A new auxin-inhibiting substance was isolated from light-grown maize shoots. The structural determination was performed by spectroscopic methods and synthesis of 4-chloro-6,7-dimethoxybenzoxazolin-2-one.
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Naotake Kaneta, Ken Hikichi, Shin-ichi Asaka, Motokazu Uemura, Miwako ...
1995 Volume 24 Issue 11 Pages
1055-1056
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A novel disubstituted alkyne synthesis was developed using molybdenum catalyzed cross-alkyne metathesis by Mortreux’s catalyst [Mo(CO)
6-
p-ClC
6H
4OH]. The reaction was carried out using Mo(CO)
6 (5 mol% for total amounts of alkynes) and
p-ClC
6H
4OH (1 equiv.) in the presence of an excess amount of another alkyne (3∼11 equiv.) in refluxing toluene.
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Toshiaki Murai, Hiroya Takada, Takahiro Kanda, Shinzi Kato
1995 Volume 24 Issue 11 Pages
1057-1058
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Allylations of selenothioic acid
S-alkyl esters with allylic bromides in the presence of Et
3N in THF took place selectively at the α-position of selenocarbonyl group to give allylated products with high regio- and stereo-selectivity.
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Yuko Kani, Tsutomu Takayama, Shinji Inomata, Tsutomu Sekine, Hiroshi K ...
1995 Volume 24 Issue 11 Pages
1059-1060
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Nitridotechnetium complex with a tetradentate amine oxime ligand PnAO (propylene amine oxime; 3,3,9,9-tetramethyl-4,8-diazaundecane-2,10-dione dioxime) was synthesized and its structure was determined by X-ray crystallography.
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Yoshimi Sueishi, Tomonori Nishimura, Tamami Miyakawa
1995 Volume 24 Issue 11 Pages
1061-1062
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The thermal isomerizations of 1′,3′,3′-trimethyl-spiro[2H-1-benzopyran-2,2′-indoline]-6-sulfonic acid between its spiro (SP) and merocyanine (MC) forms were followed spectrophotometrically by using β-cyclodextrin as the control of the isomerization reaction. The rate constants of the thermal isomerizations were estimated to be 2.27 × 10
−3 s
−1 for MC → SP and 3.03 × 10
−3 s
−1 for SP → MC.
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Takeshi Kajiki, Norio Tamura, Tatsuya Nabeshima, Yumihiko Yano
1995 Volume 24 Issue 11 Pages
1063-1064
Published: 1995
Released on J-STAGE: March 01, 2006
JOURNAL
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A melamine derivative bearing a guanidinium ion was found to enhance the oxidation-activity of flavin via hydrogen bonding at the N(1) position of the isoalloxazine ring for the oxidation of N-benzyl-1,4-dihydronicotinamide (BNAH) in CHCl
3.
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Isomerization of a Linear Pentamine, 1,4,7,10,13-Pentaazatridecane, to a Branched Form, 4-(Aminoethyl)-1,4,7,10-tetraazadecane, on a Schiff-base Copper Complex Relevant to Multi-copper Enzymes
Ken-ichiro Motoda, Mika Aiba, Chiho Kokubo, Naohide Matsumoto, Hisashi ...
1995 Volume 24 Issue 11 Pages
1065-1066
Published: 1995
Released on J-STAGE: March 01, 2006
JOURNAL
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The 1:2 Schiff-base of 2,6-diformyl-4-methylphenol and 1,4,7,10,13-pentaazatridecane formed a tetranuclear assembly complex {Cu(II)-Cu
2(II,II)-Cu(II)} possessing a dinuclear Cu
2 core and two mononuclear Cu auxiliaries. The two-electron reduction of the complex and reoxidation in air resulted in the formation of a dinuclear Cu
2(II,II) complex of a macrocycle comprised of 2,6-diformyl-4-methylphenol and branched 4-(2-aminoethyl)-1,4,7,10-tetraazadecane (2:2) instead of the linear pentamine.
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