-
Sheng Yao, Youichi Shimizu, Norio Miura, Noboru Yamazoe
1993 Volume 22 Issue 2 Pages
193-196
Published: 1993
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The solid electrolyte sensor device using a sodium ionic conductor and NaNO
3 (auxiliary phase) was found to exhibit a remarkable feature that its EMF response to NO
2 is totally independent of the concentration of coexisting oxygen. The response to NO, however, was seriously affected by the presence and absence of O
2, suggesting the oxidation of NO to NO
2 prior to being sensed. In the absence of NOx, the sensor EMF changed with changing oxygen concentration following the Nernst’s equation for a 2-electron reaction of O
2.
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John M. Nuss, Roger A. Rennels
1993 Volume 22 Issue 2 Pages
197-200
Published: 1993
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The catalysis of the nucleophilic addition of an allylic stannane to aromatic aldehydes by cationic rhodium and iridium complexes is described. The scope, generality, and several mechanistic speculations concerning this process are discussed. Initial attempts at utilizing optically active catalysts for the enantioselective addition of allyltributyltin to benzaldehyde are also outlined.
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Osamu Sakatsume, Hiroaki Tanaka, Hiroshi Takaku
1993 Volume 22 Issue 2 Pages
201-204
Published: 1993
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Oligoribonucleotides containing morpholino-nucleosides with carbamate internucleoside linkages at the 3′-terminus were synthesized by the solid phase method. These analogues were examined for stability in a prokaryotic cell-free system.
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Koji Araki, Hiroyasu Shimizu, Seiji Shinkai
1993 Volume 22 Issue 2 Pages
205-208
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The cation-π interaction was studied using 9 calix[n]arenes with the different cavity size and the different cavity shape: the efficient binding of N-methylpyridinium iodide was observed for calix[6]arenes among calix[n]arenes and for cone isomers among calix[4]arene conformers, indicating the importance of the host-guest-type cation inclusion in the π-base cavities.
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Mohammad Nasikin, Ryuichi Nakamura, Hiroo Niiyama
1993 Volume 22 Issue 2 Pages
209-212
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A synthesis of methylamines from ammonia and methanol was studied by using mainly the title heteropoly catalyst. Although at low temperatures below ca. 750 K the three methylamines (MMA, DMA, and TMA) were formed as usual, at higher temperatures the formation of TMA was completely suppressed. This unusual product selectivity was explained by the strong adsoption of TMA to the catalyst.
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Miwako Mori, Fumihiko Saitoh, Noriaki Uesaka, Masakatsu Shibasaki
1993 Volume 22 Issue 2 Pages
213-216
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The optical purity of (−)-dendrobine synthesized using zirconium promoted cyclization was improved and the absolute configuration of the intermediary tricyclic ketone was determined using the improved Mosher’s method developed by Kusumi.
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Ram Seshadri, Francis D’Souza, Varadachari Krishnan, C.N.R. Rao
1993 Volume 22 Issue 2 Pages
217-220
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Based on electronic absorption spectroscopy, C
60 is found to form complexes with aromatic amines with an enthalpy of association in the range 9–16 kJ mol
−1. Interaction of C
70 with the amines is negligible. Cyclic voltammetric measurements confirm these observations.
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Yutaka Ukaji, Kouji Tsukamoto, Yasunori Nasada, Makoto Shimizu, Tamots ...
1993 Volume 22 Issue 2 Pages
221-224
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Diastereofacial selectivity in the α-allylation reaction of chiral cyclic α-acyloxy amide, derived from succinic anhydride and (
R)-2-methoxy-1-phenylethylamine could be regulated using appropriately selected Lewis acids;
i.e., the reaction using Lewis acids such as TiCl
4 gave (
R,
S)-α-allylated amides, while allylation promoted by SnCl
4 afforded (
R,
R)-isomers stereoselectively. The similar result was obtained in the reaction of chiral amide prepared from phthalic anhydride.
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Ken-ichi Okamoto, Nobuhiro Umeo, Shuusaku Okamyo, Kazuhiro Tanaka, Hid ...
1993 Volume 22 Issue 2 Pages
225-228
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Polyethyleneoxide(PEO)-containing copolyimides having microphase separated structure have high permeability to CO
2 and high permselectivity for CO
2 over N
2. The permeation occurs through soft segment phase of PEO and the high permselectivity is ascribed to high solubility selectivity.
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Katsunori Yogo, Michito Ihara, Ikue Terasaki, Eiichi Kikuchi
1993 Volume 22 Issue 2 Pages
229-232
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Selective reduction of nitric oxide with methane or ethane in the presence of excess oxygen was investigated using a gallium ion-exchanged ZSM-5 zeolite catalyst(Ga-ZSM-5). Ga-ZSM-5 was highly active and selective for NO reduction above 400 °C. The limiting molar ratios of reacted NO to consumed carbon in C
2H
6 and CH
4 at 500 °C were found to be 1.5 and 2, respectively.
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Toshio Itahara
1993 Volume 22 Issue 2 Pages
233-236
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Treatment of pyrimidine bases with X(CH
2)
nX (X = Br or I; n = 5–12) in,
N,N-dimethylformamide containing sodium hydride afforded three types of pyrimidinophanes.
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Akira Harada, Jun Li, Mikiharu Kamachi
1993 Volume 22 Issue 2 Pages
237-240
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γ-Cyclodextrin forms an inclusion complex with poly(methyl vinyl ether) in a definite stoichiometry in high yield, although α-cyclodextrin and β-cyclodextrin did not form complexes with poly(methyl vinyl ether). The inclusion complex is a thermally stable crystalline compound.
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Junji Inanaga, Yoshiyasu Baba, Takeshi Hanamoto
1993 Volume 22 Issue 2 Pages
241-244
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The conjugate addition of alcohols to α,β-unsaturated alkynic acid esters proceeds under neutral conditions in the presence of a catalytic amount of trialkylphosphine to give the corresponding β-alkoxy-α,β-unsaturated alkenic acid esters in good to excellent yields.
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Hiroshi Fukumura, Kouji Hamano, Hiroshi Masuhara
1993 Volume 22 Issue 2 Pages
245-248
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Transient absorption spectra of p-terphenyl doped poly(methyl methacrylate) (PMMA) film upon laser ablation shows that no other transient species than the excited singlet and triplet states is involved. Fragmented particles were observed from 50 ns after excitation, while all morphological changes were completed in sub-ms time range.
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Tsutomu Morikawa, Yoshiaki Washio, Motoo Shiro, Takeo Taguchi
1993 Volume 22 Issue 2 Pages
249-250
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Addition reactions of alkyl radicals to chiral (
Z)-α,β-unsaturated ester derivatives obtained from (
R)-2,3-
O-isopropylidene glyceraldehyde proceeded with high stereoselectivity (1,2-asymmetric induction).
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Shuichi Matsumura, Hiroshi Imafuku, Yoshinori Takahashi, Kazunobu Tosh ...
1993 Volume 22 Issue 2 Pages
251-254
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(
S)-3-Hydroxybutyric acid and (
S)-1,3-butanediol were obtained by the treatment of 1,3-butanediol with the resting cells of methanol yeast,
Candida boidinii (IFO 10574). (
R)-1,3-Butanediol was also obtained in high optical purity by the enantioselective reduction of 4-hydroxy-2-butanone in the presence of methanol using the same methanol yeast.
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Jun’ichi Uenishi, Keiji Takahashi, Mitsuhiro Motoyama, Haruo Aka ...
1993 Volume 22 Issue 2 Pages
255-256
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4′-Thiothymidine was synthesized by SnCl
4 mediated coupling of 5-O-acetyl-3-O-
tert-butyldimethylsilyl-2-deoxy-4-thio-
D-erythro-pentofuranoside with 2,4-bis(trimethylsilyl)thymine and the structure was determined by X-ray analysis.
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Yoshitomo Kashiwagi, Hiroaki Ono, Tetsuo Osa
1993 Volume 22 Issue 2 Pages
257-260
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2- and 4-Methylquinolines were oxidized to 2,2′-dimethyl-4,4′-biquinolyl and 4,4′-dimethyl-2,2′-biquinolyl, respectively, both in ca. 94% isolated yield and ca. 90% current efficiency on a graphite felt electrode coated with a thin poly(acrylic acid) layer containing 4-amino-2,2,6,6-tetramethylpiperidinyl-1-oxyl (4-amino-TEMPO). The reaction proceeds via electrocatalytic oxidation of the modified-TEMPO species. The electrode was not inactivated during electrolysis and could be used repeatedly.
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Hiroshi Uyama, Hisataka Kato, Shiro Kobayashi
1993 Volume 22 Issue 2 Pages
261-262
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Dispersion polymerization of
N-vinylformamide (NVF) was performed in methanol using a hydrophilic polymer or a poly(2-methyl-2-oxazoline) macromonomer as a stabilizer. The polymerization of NVF using poly(2-ethyl-2-oxazoline) as stabilizer gave relatively monodisperse polymer particles in the size of micron range. In using the macromonomer, monodisperse PNVF particles in the sub-micron range were obtained.
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Hisashi Fujihara, Toshinori Uehara, Tomoki Erata, Naomichi Furukawa
1993 Volume 22 Issue 2 Pages
263-266
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The reaction of 5
H,7
H-dibenzo[
b,
g][1,5]ditellurocin with I
2 resulted in the formation of the diiodo-ditellurane as a new class of bis-hypervalent chalcogenide. Treatment of the dibromo-derivative of 5
H,7
H-dibenzo[
b,
g][1,5]telluraselenocin with aqueous NaOH solution afforded exclusively the telluroxide which showed the strong transannular hypervalent interaction between the tellurinyl group and the selenyl group as evidenced by
77Se and
125Te NMR spectroscopy.
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Akira Sekiguchi, Masaaki Ichinohe, Tetsuo Nakanishi, Hideki Sakurai
1993 Volume 22 Issue 2 Pages
267-270
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6Li and
13C NMR spectra of 1,2-dilithio[tetrakis(trimethylsilyl)]ethane revealed a doubly bridged π-structure in aromatic solvents similar to that observed in the crystals. However, the dianion in THF, which was found to exist as a solvent–separated ion pair of Li
+(THF)
4 and a species bridged by one Li atom, was reactive to undergo anionic rearrangement.
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Akira Ohkubo, Kunitsugu Aramaki, Hiroshi Nishihara
1993 Volume 22 Issue 2 Pages
271-274
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A new π-conjugated organometallic polymer of which framework is in part composed of cobaltacyclopentadienes has been synthesized by a metallacycle formation reaction of CpCo(PPh
3)
2 with 4,4′-diethynylbiphenyl. The polymer, poly(4,4′-biphenylene 2,5-cobaltacyclopenta-2,4-dienylene) has a strong absorption band around 500 run, and is oxidized at +0.306 V
vs. Ag/Ag
+ in dichloromethane and reduced at −1.8 V in acetonitrile.
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Yoshihisa Watanabe, Hiro-aki Yamada, Nori-aki Kawasaki, Kenji Wada, Ka ...
1993 Volume 22 Issue 2 Pages
275-278
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Pentacarbonyliron with sulfur was found to be an excellent catalyst precursor for liquefaction of Yallourn coal using syngas-water as a hydrogen source. Both the high coal conversion and well-balanced consumption of syngas were achieved by controlling the amount of water. The two-staged reaction at 375 °C for 1 h and then at 425 °C for 1 h showed high coal conversion of 96.7% with high oil yield.
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Norikazu Nishino, Toshiaki Sakamoto, Hiroshi Kiyota, Hisakazu Mihara, ...
1993 Volume 22 Issue 2 Pages
279-282
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5,10,15,20-Tetrakis(2-amino-6-methoxycarbonylphenyl)porphyrin was synthesized and three atropisomers in four were successfully separated. Different from the related mono-substituted tetraphenylporphyrins (2-amino- and 2-methoxycarbonylphenylporphyrins), the rotation of the bond between phenyl and porphyrin rings was totally prohibited under thermal isomerization.
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Kiminori Itoh, Masayuki Murabayashi, Kazuki Yamazaki, Akira Fujishima
1993 Volume 22 Issue 2 Pages
283-286
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Glass optical waveguides (OWGs) doped with alkali ions were examined mainly in terms of optical sensitivity of monitoring surface chemical species located at surfaces. The maximum sensitivity (per 1 cm optical path length) for K
+-doped glass OWGs was ca. 50 times as large as that of conventional optical measurements with normal incidence of monitoring light. Rb
+-doped and Cs
+-doped OWGs had higher sensitivities, but they showed rather large attenuation of the guided light.
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Feng Qi Chen, Takashi Hirano, Mamoru Ohashi, Hitoshi Nakayama, Kazuaki ...
1993 Volume 22 Issue 2 Pages
287-290
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A photoreactive analogue of coelenteramide (light emitting species in aequorin bioluminescence) has been synthesized for photoaffinity labeling studies of aequorin. Photolysis of this compound in methanol gave a formal OH insertion product in 62% yield without damage of the main skeleton of coelenteramide, indicating a potential use for mapping the coelenterazine binding site in aequorin.
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Miroslav Marek, Jr., Kenji Fukuta, Toyoki Kunitake
1993 Volume 22 Issue 2 Pages
291-294
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A multilayered film of two-dimensionally cross linked poly(tetraallylammonium bromide) was prepared using a cast film of bilayers of a double-chain ammonium amphiphile as template. This film displayed unique electrochemical properties.
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Taisei Nishimi, Yuichi Ishikawa, Toyoki Kunitake, Mari Sekita, Guiqint ...
1993 Volume 22 Issue 2 Pages
295-298
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Cast films prepared from benzylideneaniline- and salicylideneaniline-containing ammonium amphiphiles at room temperature possess interdigitated bilayer structures. These molecular assemblies show various types of crystalline modifications above their transition temperatures.
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Sambasivarao Kotha, Atsuo Kuki
1993 Volume 22 Issue 2 Pages
299-302
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Electron deficient cyclic α-amino acid derivatives bearing 1,4-benzoquinone and 1,4-anthraquinone side chains were synthesized by a novel route. The common precursor, 2-amino-4,7-dimethoxy-indan-2-carboxylic acid, may be incorporated into a peptide prior to the final oxidation and annelation reactions.
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Kahee Fujtta, Kazuko Ohta, Yuji Okabe, Takashi Ishizu, Takehiko Yamamo ...
1993 Volume 22 Issue 2 Pages
303-306
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Specifically substituted maltooligosaccharides were prepared through the enzymatic hydrolysis of β-cyclodextrin derivatives by bacterial α-amylase (saccharifying type).
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Akio Hirose, Yukihiro Esaka, Michiru Ohta, Hiroki Haraguchi
1993 Volume 22 Issue 2 Pages
307-310
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Fundamental studies on the on-line HPLC detection of enzymatic activity of alkaline phosphatase (APase) has been examined, where 4-methylumbelliferyl phosphate was used as a substrate. The technique developed was applied to detection of APase in natural water.
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Yoshihiro Yamakita, Yukio Furukawa, Mitsuo Tasumi
1993 Volume 22 Issue 2 Pages
311-314
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The infrared and Raman spectra of
p-benzoquinodimethane have been observed in low-temperature Ar matrices. The infrared spectrum obtained has proved to be more reliable and useful than the existing numerical data on the absorption wavenumbers and qualitative intensities. The Raman spectrum has been observed for the first time. Vibrational assignments of bands characteristic of this quinoid molecule are discussed on an experimental basis.
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Hiroshi Yamashita, N. Prabhakar Reddy, Masato Tanaka
1993 Volume 22 Issue 2 Pages
315-318
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α-Diketones (benzil, methyl phenyl diketone, acenaphthenequinone, camphorquinone) reacted with hexamethyldisilane in the presence of a Pd or Pt catalyst (PdCl
2(PMe
3)
2, Pt
2(dba)
3-P(OCH
2)
3CEt, etc.) to give the corresponding 1,2-bis(trimethylsiloxy)ethenes in excellent to moderate yields, while methyl benzoylformate provided dimethyl 2,3-diphenyl-2,3-bis(
O-trimethylsilyl)tartrate.
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Yasuo Gama, Masahiko Yasumoto
1993 Volume 22 Issue 2 Pages
319-322
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High pressure-assisted glycosylation reaction of 2-benzothiazoyl 2,3,4,6-tetra-
O-benzyl-1-thio-β-
D-glucopyranoside with various alcohols by using methyl iodide as an activator gave α-glucosides in good yield with high selectivity without any use of heavy metal salts.
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Masami Yabuta, Shingo Nakamura, Tsuneaki Yamagata, Kazuhide Tani
1993 Volume 22 Issue 2 Pages
323-326
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As the first example of a crystallographically confirmed transition metal complex with a bidentate hybrid ligand spanning
trans positions, the square-planar palladium(II) complex containing the
trans chelating pyridyl-phosphine bidentate hybrid ligand, bound through a pyridine and a phosphine,
trans-PdCl
2{
o-Ph
2PC
6H
4CH
2O(CH
2)
3-2-C
5H
4N}, is prepared and the crystal structure was determined.
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Teruaki Mukaiyama, Tohru Yamada, Takushi Nagata, Kiyomi Imagawa
1993 Volume 22 Issue 2 Pages
327-330
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Optically active
N,
N′-ethylenebis(α-alkoxycarbonyl-β-ketoimine) was found to be a new class of effective ligand of manganese(III) complex catalyst for the asymmetric aerobic epoxidation of simple olefins, such as 1,2-dihydronaphthalene derivatives, to afford the corresponding optically active epoxides with good to high enantioselectivities.
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Koji Kondo, Katsuaki Kojima, Nobumasa Ishida, Masahiro Irie
1993 Volume 22 Issue 2 Pages
331-334
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With the addition of potassium hexacyanoferrate(II) to the 2,2′2″-nitrilotriethanol (TEA) electroless copper bath, the effects of the plating rate and the deposit quality were examined. The required concentration to improve the quality of the TEA bath was 10 times higher than that in the ethylenediaminetetraacetic acid (EDTA) bath.
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Yusaku Takita, Kazuo Kurosaki, Yukako Mizuhara, Tatsumi Ishihara
1993 Volume 22 Issue 2 Pages
335-338
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Oxidation of iso-butane was studied using metal pyrophosphate catalysts and it was found that iso-butene was formed with 82% selectivity over Ni
2P
2O
7 at 550 °C. Zn
2P
2O
7, Cr
4(P
2O
7)
3, and Mg
2P
2O
7 showed 60–70% iso-butene selectivity. and 9–22% selectivity to CO and CO
2. Deep oxidation into CO and CO
2 was promoted over Cu
2P
2O
7 and Sn
2P
2O
7 Only small amounts of oxygenated products such as alcohols, aldehydes, ketones, and carboxylic acids were formed over every catalyst.
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Hiroshi Morita, Kouji Matsumoto, Koichi Takeya, Hideji Itokawa, Yoichi ...
1993 Volume 22 Issue 2 Pages
339-342
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Pareirubrine, a novel tropoloisoquinoline alkaloid with antileukemic activity was isolated from
Cissampelos pareira and the structure was determined on the basis of its spectroscopic data and X-ray diffraction analysis.
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Takashi Yamanoi, Kazumi Nakamura, Hiroshi Takeyama, Kenji Yanagihara, ...
1993 Volume 22 Issue 2 Pages
343-346
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1,2-cis-β-Mannopyranosides were obtained predominantly by reactions of mannopyranosyl dimethylphosphinothioate derivatives with several alcohols in the presence of iodine and a catalytic amount of triphenylmethyl perchlorate as the activator in benzene.
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Hideo Nagashima, Takanori Ueda, Hisao Nishiyama, Kenji Itoh
1993 Volume 22 Issue 2 Pages
347-350
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Dehydrogenative silylation of ketones with 1,2-bis(dimethylsilyl)ethane is catalyzed by a mixture of RhCl
3(pybox) and AgOTf to form the corresponding silylenol ether in high yields. Only one Si-H group of 1,2-bis(dimethylsilyl)ethane is converted to the corresponding silyl enol ether.
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Shigeo Katsumura, Yasuhiro Inagaki, Katsunori Tsujino, Qingjun Han
1993 Volume 22 Issue 2 Pages
351-352
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Manoalide analogues, which inhibit bovine pancreatic phospholipase A
2 to the same extent as manoalides, a deshydroxymanoalide analogue, and udoteafuran were synthesized in short steps.
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Naoko Yoshie, Hiroaki Hamada, Shigehiro Takada, Yoshio Inoue
1993 Volume 22 Issue 2 Pages
353-356
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Cycloinulohexaose(CF6), which is a cyclohexaose composed of six(2→1) linked β-
D-fructofuranosyl units, has a 18-crown-6 skeleton in its center. Selective complexation of CF6 with some metal ions have been observed in D
2O by NMR spectroscopy. The variation of
1H NMR chemical shifts indicates that the ether oxygen atoms or CF6 should act as electron donors, which interact electrostatically with the metal ions.
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Masayuki Arai, Takashi Kawasuji, Eiichi Nakamura
1993 Volume 22 Issue 2 Pages
357-360
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Dialkylzinc reagents, R
2Zn and R
2Zn·LiCl, undergo an S
N2′-regio- and diastereoselective allylation reaction with substituted allylic chlorides and phosphates in the presence of a coordinating additive.
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Yong-bo Chong, Nobuatsu Watanabe, Hiroyuki Idogawa, Atsushi Wakata
1993 Volume 22 Issue 2 Pages
361-364
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The dispersion stability of graphite particles in water was largely increased by a surface modification of direct fluorination. The fluorinated graphite particles in water did not flocculate and kept stable suspension for long time, and it was found that the surface of fluorinated graphite particles became more hydrophilic and was highly polarized in water.
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Kazuo Takimiya, Fumihiko Yashiki, Yoshio Aso, Tetsuo Otsubo, Fumio Ogu ...
1993 Volume 22 Issue 2 Pages
365-368
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Naphtho[1,8-
bc:4,5-
b′
c′]dithiophene was conveniently prepared via annulation of benzo[1,2-
b:4,3-
b′]dithiophene and converted to 2,5-dimethyl and bis(methylthio) derivatives. The parent and methylthio compounds have a herringbone type of crystal structures, and formed conductive charge-transfer complexes with iodine and with DDQ.
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Takuji Hirose, Kazuhisa Hiratani, Kyoko Fujiwara, Kazuyuki Kasuga
1993 Volume 22 Issue 2 Pages
369-370
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1,2-Bis(benzoquinolyloxy)ethane, which has been prepared as a carrier in alkali cation transport through liquid membranes, exhibits high Li
+-selectivity. From a systematic investigation, we found the length of the ethylene chain linking the two benzoquinolyl units is crucial for Li
+-selective transport.
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Akira Shimoyama, Hiroshi Naraoka, Osamu Matsubaya, Kaoru Harada
1993 Volume 22 Issue 2 Pages
371-374
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Total carbon contents and carbon isotopic compositions (δ
13C relative to PDB) in 33 specimens of Antarctic carbonaceous chondrites are in the ranges of 0.02 to 2.49% and −16.9 to +0.9‰ with the mean values 1.31% and −5.8‰, respectively. The value −5.8‰ is very close to that for the average juvenile mantle carbon but is 5.7‰ higher than that for non-Antarctic ones.
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Hiroshi Ohno, Atsunori Mori, Shohei Inoue
1993 Volume 22 Issue 2 Pages
375-378
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A rapid transhydrocyanation from acetone cyanohydrin to several aldehydes and ketones is promoted by a catalytic amount of lanthanoid(III) alkoxide to provide the corresponding cyanohydrins.
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Hiroyuki Sugimura, Tatsuya Uchida, Noboru Kitamura, Hiroshi Masuhara
1993 Volume 22 Issue 2 Pages
379-382
Published: 1993
Released on J-STAGE: March 21, 2006
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Platinum (Pt) micropatterns were fabricated photocatalytically on titanium oxide (TiO
2) surface by projecting a reduced light image of a photomask. Negative and positive Pt patterns on TiO
2 with the spatial resolution better than 10 μm were obtained by photoreduction of PtCl
42− to Pt in aqueous K
2PtCl
4 solution and photoetching of the deposited Pt in aqueous HCl solution, respectively.
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