-
Taro Tsubomura, Atsushi Itsuki, Masahiko Homma, Ken Sakai
1994 Volume 23 Issue 4 Pages
661-664
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Photoirradiation on [Pd
02(dppm)
3] (dppm = bis(diphenylphosphino)methane) in 1,2-dichloroethane solution with visible light yields [Pd
I2Cl
2(dppm)
2] (
2) and ethylene quantitatively. Irradiation of
2 in various solutions shows interesting photochromic behavior.
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Toshio Kawato, Hiroyuki Koyama, Hajime Kanatomi, Kazumi Yonetani, Hide ...
1994 Volume 23 Issue 4 Pages
665-668
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Deoxycholic acid formed a definite inclusion compound with non-photochromic
N-salicylidene-2-aminopyridine.The guest Schiff base exhibited photochromism within the clathrate cavities. First-order rate constants for the thermal bleaching reaction of the photochrome were measured by reflectance spectrophotometry.
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Teruo Shinmyozu, Mihoko Hirakida, Shirou Kusumoto, Mie Tomonou, Takahi ...
1994 Volume 23 Issue 4 Pages
669-672
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[3
5](1,2,3,4,5)Cyclophane 3 was synthesized by an acid-catalyzed eyclization between a pseudogeminally substituted acetyl group and a chloromethyl group of a tetra-bridged compound followed by two-step hydrogenation of the resulting penta-bridged bromo-olefin. 3 shows the strongest transannular π–π interaction among [m.n]- and multibridged benzenophanes synthesized so far. 3 is conformationally mobile at room temperature in CD
2Cl
2, and two conformers 3a and 3b are observed at −90 °C.
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Kiyotsuna Toyohara, Tomoharu Yamami, Taisei Nishimi, Toyoki Kunitake
1994 Volume 23 Issue 4 Pages
673-676
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Bilayer membranes of chiral double-chain ammonium amphiphiles incorporated an anionic tridentate ligand in enantiomeric orientations, as confirmed by induced circular dichroism. Complexation of aqueous CoSO
4 with the bilayer-bound ligand led to formation of chiral Co(III) complexes.
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Isamu Shiina, Teruaki Mukaiyama
1994 Volume 23 Issue 4 Pages
677-680
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An efficient method for the synthesis of macrolides directly from ω-hydroxycarboxylic acids is established by using 4-(trifluoromethyl)benzoic anhydride and a catalytic amount of active titanium(IV) salts together with chlorotrimethylsilane under mild conditions.
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Kazuhiko Tsukagoshi, Rika Kawasaki, Mizuo Maeda, Makoto Takagi
1994 Volume 23 Issue 4 Pages
681-684
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Microspheres having phenylboronic acid groups on the resin surface were successfully prepared by emulsion polymerization of styrene, butyl acrylate, and m-acrylamidophenylboronic acid. The microspheres were swollen in an alkaline aqueous suspension by adding methylethylketone so that phenylboronic acid groups in the resin migrate out to the aqueous-organic interface in their ionized forms.
D-Glucose was bound onto the microsphere by complex (ester) formation between phenylboronic acid moiety and
cis-diol group of
D-Glucose.
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Shin-ichi Mitsubori, Takayuki Ishida, Takashi Nogami, Hiizu Iwamura, N ...
1994 Volume 23 Issue 4 Pages
685-686
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A ferromagnetic transition was observed at about 0.14 K in the molecular crystals of the title complex. The isothermal magnetization measured at 85 mK (below
Tc) showed an S-shaped curve characteristic of a ferromagnet with a small hysteresis. The present system realizes the high-spin molecule toward molecular-based ferromagnets.
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Toshio Takayanagi, Tohru Kudoh, Takao Yotsuyanagi
1994 Volume 23 Issue 4 Pages
687-690
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Lanthanide ions were not extracted with 5,7-dimethyl-8-quinolinol in the wide pH region of less than 11, even though other metal ions of Al
3+, and the first transition metal ions were extracted at ordinary pH conditions. To realize this specificity, the presence of both of alkyl groups at 5- and 7- positions was essential. The possibility of application of this finding to the separation and purification of lanthanide is discussed.
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Isamu Moriguchi, Kouhei Hanai, Akiko Hoshikuma, Yasutake Teraoka, Shui ...
1994 Volume 23 Issue 4 Pages
691-694
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The ionic complex between a cationic double-chain amphiphile and a decatungstate anion formed a well-organized multibilayer film, not only with keeping inherent properties of both the amphiphile and decatungstate anion almost intact but also with generating unique temperature dependence of the redox reaction regulated by the phase transition of bilayer.
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Yoshihiko Misumi, Youichi Ishii, Masanobu Hidai
1994 Volume 23 Issue 4 Pages
695-698
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Anion complex [Co(CO)
4]
− reacted with iodoarenes to form aroylcobalt complexes in the presence of a palladium catalyst and excess PPh
3. As models of the intermediate of this reaction, Pt–Co and Pd–Co dinuclear complexes were synthesized from reactions of [Co(CO)
4]
− with Pt(Ar)(OTf)(PPh
3)
2 and Pd(Ar)(OTf)(PMe
3)
2, respectively, and their crystal structures were determined by X-ray analysis.
View full abstract
-
Very Convenient and Efficient Purification Method for Fullerene (C60) with 5,11,17,23,29,35,41,47-Octa-tert-butylcalix[8]arene-49,50,51,52,53,54,55,56-octol
Tsuyoshi Suzuki, Kazuaki Nakashima, Seiji Shinkai
1994 Volume 23 Issue 4 Pages
699-702
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The gram-order of fullerene (C
60) with 99.8 wt% purity was isolated from carbon soot by fractional precipitation with 5,11,17,23,29,35,41,47-octa-
tert-butylcalix[8]arene-49,50,51,52,53,54,55,56-octol. This is a very convenient and efficient C
60 purification method without any precious apparatus.
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Mayumi Nishida, Takamasa Fuchikami, Kiyosi Kondo
1994 Volume 23 Issue 4 Pages
703-706
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A practical and efficient route to fluorinated pyrethroids has been developed which involves the selective formation of the
cis cyclopropane ring using intramolecular alkylation of the haloaldehyde and a novel transformation of the aldehydes to the corresponding esters
via the cyanohydrins.
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Yasuhiko Kawamura, Yasunori Iwano, Yoshihiko Shimizu, Yumi Tokai, Toku ...
1994 Volume 23 Issue 4 Pages
707-710
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Deoxygenation of arylnitrones occurred to give imines in variable yields along with the ketonic product formation under photosensitized electron-transfer conditions.
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Yoshio Tsujino, Seiji Tsurumi, Toshiyuki Osakai, Atsuyoshi Saito
1994 Volume 23 Issue 4 Pages
711-714
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γ-Pyronyl-triterpenoid saponin (chromosaponin I; CSI) isolated from pea is strongly adsorbed at a glassy-carbon electrode, and gives an irreversible oxidation wave at 0.4 V
vs. Ag/AgCl. The γ-pyronyl moiety is responsible for the electroactivity. CSI can reduce 1,4-benzoquinone, some of its derivatives and also cytochrome
c. From comparison with other reductants, the formal redox potential of CSI was estimated to be 0.3–0.4 V
vs. NHE (pH 7.0).
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Yoshiaki Ohgo, Yoshifusa Arai, Mieko Hagiwara, Seiji Takeuchi, Hidenor ...
1994 Volume 23 Issue 4 Pages
715-718
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Solid-state asymmetric photoisomerization of 2-cyanoethylcobaloxime complexes occurred to afford optically active 1-cyanoethylcobaloxime complexes with moderate to high enantioselectivities (∼82%ee). The X-ray crystal structure analysis of (
R)-2-phenylglycinol-coordinated complex revealed that the 2-cyanoethyl group is forced to take a chiral conformation by chiral crystal lattice. The enantioselection mechanism is also discussed based on the X-ray results.
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Makoto Hojo, Masayuki Nagayoshi, Atsuko Fujii, Toshiharu Yanagi, Naruy ...
1994 Volume 23 Issue 4 Pages
719-722
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Silylamines add to α,β-unsaturated aldehydes and ketones in 1,4-addition mode to generate amino-substituted silyl enol ethers without any catalysts. These easily isolable silyl enol ethers react with acetals and aldehydes in the presence of a Lewis acid to give α-alkoxyalkyl and α-hydroxyalkyl substituted α,β-unsaturated carbonyl compounds, respectively, after deamination by treatment with silica gel.
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Iis Sopyan, Sadao Murasawa, Kazuhito Hashimoto, Akira Fujishima
1994 Volume 23 Issue 4 Pages
723-726
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A glass-supported pure anatase film with an extremely high photocatalytic activity has been prepared. Photocatalytic properties of the film were investigated by measuring the degradation of gaseous acetaldehyde under relatively strong (black fluorescent light) and weak (white fluorescent light) UV light irradiations. It was found that the photocatalytic efficiency was higher than that of Degussa P25, one of the most efficient commercial TiO
2 powders.
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Kazuki Sada, Takashi Kondo, Yoshitaka Yasuda, Mikiji Miyata, Kunio Mik ...
1994 Volume 23 Issue 4 Pages
727-730
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5β-Petromyzonol does not form crystalline inclusion compounds with organic substances in contrast to cholic acid, cholanamide and methyl cholate. The crystal structures of these hosts give direct evidence for such an inclusion feature. 5β-Petromyzonol forms greatly different bilayered crystals from other hosts with respect to the hydrogen bonding networks, molecular arrangements, and stacking modes.
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Yasuro Niidome, Masamichi Fujihira
1994 Volume 23 Issue 4 Pages
731-734
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Ion-complexation between a cationic amphiphile and pyrene-1-carboxylate (PyCOO
−) dispersed the PyCOO
− anions homogeneously in a Langmuir-Blodgett monolayer film. By bringing the film into contact with HCl gas, formation of fluorescent spots in the monolayer was observed by fluorescence microscopy. With an atomic force microscope, the spots were found to be topographically much higher than the monolayer level, and concluded to be aggregates formed by lateral diffusion of neutralized pyrene-1-carboxylic acid (PyCOOH) molecules in the monolayer.
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Norio Yoshino
1994 Volume 23 Issue 4 Pages
735-736
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Atomic force microscopic (AFM) data of glass surface modified with silane coupling agent containing fluorocarbon chain, (1H,1H,2H,2H-henicosafluorododecyl)trimethoxysilane, were obtained. Fluorocarbon chains on the modified glass surface were found to stand close together. Double- or triple-layer of the silane on the modified surface was observed mainly near the border between modified- and unmodified-area.
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Masaharu Okazaki, Yoshinari Konishi, Kazumi Toriyama
1994 Volume 23 Issue 4 Pages
737-740
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Product analysis was made for the photoreduction of anthraquinone in SDS micellar solution under the various magnetic fields with a simultaneous microwave irradiation. It has been confirmed that control of a chemical reaction is possible by inducing the ESR transitions of the intermediate radical pair.
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Weidong Li, Ying Li, Yulin Li
1994 Volume 23 Issue 4 Pages
741-744
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A direct approach of low-valent titanium-induced intramolecular keto ester cyclization was first applied to the total syntheses of macrocyclic diterpenoids, by which (±)-mukulol and (±)-cembrene were synthesized from geranylacetone by a short and efficient route.
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Masa-aki Sato, Masao Hiroi
1994 Volume 23 Issue 4 Pages
745-748
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The visible-near IR and ESR spectral changes of long alkyl-substituted oligothiophene during the chemical oxidation indicated that the first oxidation yielded cation radicals (polarons) and the successive second oxidation did not dications (bipolarons) but trication radicals.
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Yasushi Yokoyama, Kazuhiro Sugiyama, Shintaro Yamada, Hitoshi Takimoto ...
1994 Volume 23 Issue 4 Pages
749-752
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Thermally irreversible photochromic properties of indolylfulgenates,
i.e. 2-alkylidene-3-[1-(1,2-dimethyl-3-indolyl)alkylidene]succinate esters were examined. A large indolylalkylidene group reduced the relative ratio of the colored species at the photostationary state of UV irradiation. Introduction of an adamantylidene group increased the bleaching quantum yield. The absorption maximum wavelengths of the colorless and colored species were shorter than those of the corresponding indolylfulgide.
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Kouji Iida, Mamoru Nango, Masaya Hikita, Ayako Hattori, Keiji Yamashit ...
1994 Volume 23 Issue 4 Pages
753-756
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Enhanced electron transfer between porphyrins in membranes cast on a glassy carbon electrode was observed especially in hydrophilic keratin membranes containing manganese protoporphyrin dimethyl esters (MnPPDME). An imidazole derivative played an important role on the electron transfer in hydrophobic S-cyanoethylated keratin membranes containing MnPPDME.
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Yoshiaki Nabuchi, Hiroyuki Yano, Masaharu Kamo, Keiji Takamoto, Kazuo ...
1994 Volume 23 Issue 4 Pages
757-760
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A chemical C-terminal sequencing method of proteins, involving cyanogen bromide cleavage of proteins, selective isolation of the C-terminal peptide and the C-terminal successive degradation with heptafluorobutyric anhydride vapor is presented. FAB/MS analysis of the C-terminal truncated peptide mixture clearly indicated the C-terminal sequence of a protein.
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Tadahiro Kato, Akiko Morioka, Masakuni Yano, Toshifumi Hirukawa, Tsune ...
1994 Volume 23 Issue 4 Pages
761-762
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The reaction of α-linolenic acid with crude enzyme (lipoxygenase) obtained from infected pumpkins led to the formation of 8Z, 11Z, 14Z-heptadecatrienal (noraldehyde) and its acid (noracid) in addition to 13S-hydroperoxy linolenic acid. Since the noraldehyde and its acid were also isolated from the crude enzyme reaction of other infected plants, their formation seems to be related with the pathogen-infection of higher plants.
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Kazuyoshi Ueda, Shigenobu Sato, Hiroshi Ochiai, Akira Imamura, Kiwamu ...
1994 Volume 23 Issue 4 Pages
763-766
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Counterion polarization of κ-, ι- and λ-carrageenans, which have different charge densities, in aqueous solution was investigated through the electric birefringence method. The data analysis by the Manning’s counterion condensation theory suggests that the loosely bound counterions mainly contribute to the ionic polarization.
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Naoyuki Nishikawa, Hideto Mori, Mitsunori Ono
1994 Volume 23 Issue 4 Pages
767-770
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A novel surfactant having two isoprenoid chains, diphytanylphosphate (
1), was synthesized. Vesicles composed of dipalmitoylphosphatidylcholine (DPPC) and
1 exhibit high barrier effect on the leakage of its contents and resistance to the aggregation.
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Satoko Tanaka, Kazuyoshi Seguchi, Kuniaki Itoh, Akira Sera
1994 Volume 23 Issue 4 Pages
771-774
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Irradiation of conjugated imino ethers containing an adjacent 1,2-diazadicarboximide group in benzene afforded rearranged indole derivatives (
3) and a novel dimer in good yields. The latter was formed by nucleophilic attack of
3 to a dipolar intermediate.
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Teiichiro Ogawa, Nobuaki Yonekura, Masami Kido, Kenji Furuya, Keiji Na ...
1994 Volume 23 Issue 4 Pages
775-776
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The Paschen-α line (1875.1 nm) of the excited hydrogen atom produced in e-H
2 collisions was observed with a grating spectrometer equipped with a PbS detector. The emission cross section was determined to be 0.95 × 10
−19 cm
2 at 100 eV.
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Masahiko Iyoda, Li Zhao, Haruo Matsuyama
1994 Volume 23 Issue 4 Pages
777-778
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The reaction of styryl carbene complexes of chromium and tungsten with 6-membered hydrazine proceeded smoothly to give the bicyclic carbene complexes, together with dehydropiperidazine complexes.
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Hiroyuki Tani, Kazunori Masumoto, Nagao Azuma, Noboru Ono
1994 Volume 23 Issue 4 Pages
779-782
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A novel π-donor, 1,2:5,6-bis(ethylenedithio)pyracylene (
2), was prepared by dithioacetalization of 1,5-pyracenedione with 1,2-ethanedithiol followed by ring expansion on treatment with tellurium tetrachloride.
2 showed two reversible low oxidation potentials by cyclic voltammetry. Single crystal X-ray analysis of
2 revealed unique three dimensional donor networks.
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Ming-hua Liu, Hiroo Nakahara, Yoshio Shibasaki, Kiyoshige Fukuda
1994 Volume 23 Issue 4 Pages
783-786
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Polycondensation of octadecyl esters of
L-phenylalanine (
L-PheC18),
L-tyrosine (
L-TyrC18) and
L-tryptophan (
L-TrpC18) in the monolayers on the subphase containing Cu(II) ion was significantly accelerated in comparison with those in the monolayers on phosphate buffer or in bulk phases. A reaction mechanism including formation of an intermediate complex and reorientation of the aromatic rings was proposed.
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Tahei Tomida, Tatsuya Inoue, Kazuhisa Fujita, Seizo Masuda
1994 Volume 23 Issue 4 Pages
787-788
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A new method using a water-soluble chelating polymer and a microporous hollow fiber was developed for concentration of copper(II) ion in water. The copper(II) ion recovered into a chelating polymer (polyacrylic acid) solution could be determined directly with ICP or UV-spectrophotometer. Cu(II) in a sample solution was calculated from the rate of concentration. It was demonstrated that this method was useful for concentration of Cu(II) existing in dilute solutions (1–1000 μg dm
−3).
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Teruaki Mukaiyama, Katsuyuki Saito, Hideo Kitagawa, Naoyuki Shimomura
1994 Volume 23 Issue 4 Pages
789-792
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Catalytic aldol reactions of several aldehydes with trimethylsilyl enol ethers are effectively performed by combined use of diphenyltin sulfide (Ph
2Sn=S) and silver perchlorate (AgClO
4) or Lawesson’s reagent (2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide) and silver perchlorate under mild conditions.
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Kiyoharu Nakatani, Katsumi Chikama, Haeng-Boo Kim, Noboru Kitamura
1994 Volume 23 Issue 4 Pages
793-796
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Electron transfer between ferrocene (FeCp) and Fe(III) across the droplet/water interface was studied by an optically transparent thin-layer electrode method. A time dependence of the FeCp concentration in the droplets caused by the interfacial electron transfer was discussed on the basis of coulometric analysis of Fe(II) or Fe(III) in the water phase and fluorometric analysis of FeCp in the droplets.
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Yuji Harada, Takayuki Aoshima, Yasushi Mizobe, Hiroyuki Oshita, Masano ...
1994 Volume 23 Issue 4 Pages
797-800
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Molybdenum and tungsten diazoalkane-isocyanide complexes
cis,
trans-[MX
2(NN=CMePh)(CNBu
t)(PMe
2Ph)
2] (M = Mo: X = Cl; M = W: X = Cl, Br), derived from
cis-[M(N
2)
2(PMe
2Ph)
4], reacted with AlMe
3 to give diazoalkane-aminocarbene complexes
cis,
trans-[MX
2(NN=CMePh){=C(Me)NHBu
t}(PMe
2Ph)
2] (
3) after hydrolysis, whose structure has been determined by an X-ray analysis for
3a (M = W, X = Cl).
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Youichi Ishii, Hidenori Hoshi, Yasushi Hamada, Masanobu Hidai
1994 Volume 23 Issue 4 Pages
801-804
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A series of novel C
60 rhodium complexes [Rh(acac)(L)
2(η
2-C
60)] (L = pyridine, 4-methylpyridine, 3,5-dimethylpyridine) were prepared by the reaction of [Rh(acac)(C
2H
4)
2] with C
60 followed by treatment with pyridine or its derivatives. The molecular structure of [Rh(acac)(3,5-Me
2py)
2(η
2-C
60)]·C
6H
6 was determined by the X-ray crystallographic analysis.
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Osamu Nakamura, Yoshihiro Mimaki, Yutaka Sashida, Tamotsu Nikaido, Tai ...
1994 Volume 23 Issue 4 Pages
805-808
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A novel (20
R,22
S)-spirostanol tetrasaccharide, named brodioside B, was isolated from
Brodiaea californica together with a new (25
S)-ruscogenin tetrasaccharide, named brodioside A. Their structures were determined by extensive 2D NMR analysis and hydrolysis. Brodiosides A and B were active as a cyclic AMP phosphodiesterase inhibitor.
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Tsunehiro Tanaka, Sakae Takenaka, Takuzo Funabiki, Satohiro Yoshida
1994 Volume 23 Issue 4 Pages
809-812
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UV-irradiation of silica-supported niobium oxide suspended in liquid ethanol under atmospheric oxygen led to the selective production of 1,1-diethoxyethane. The absence of oxygen or UV-irradiation with wavelengths of λ > 320 nm remarkably suppressed the reaction. The activity normalized to the number of niobium ions suggests that the active site is highly dispersed niobate species. Ethanal is the primary product of the photooxidation and 1,1-diethoxyethane is formed by acid catalysis.
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Hiromitsu Masada, Hiroyuki Shimanaka, Hideki Hamazaki, Takako Tokuda, ...
1994 Volume 23 Issue 4 Pages
813-816
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The nucleophilic substitution reactions of hindered 2,2-diethylbutyl methanesulfonate with potassium aryloxides were carried out in dimethyl sulfoxide at higher temperatures. New unrearranged hindered ethers were readily obtained in excellent yields as the desired products.
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Akira Nishinaga, Masafumi Yano, Tomoyoshi Kuwashige, Kazushige Maruyam ...
1994 Volume 23 Issue 4 Pages
817-820
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The position of O
2 incorporation into 2,6-di-
tert-butylphenols in the presence of Co(salpr) is correlated to redox potential
Eo (mV) of phenolate anion/phenoxy radical couple:
Eo > −645,
ortho position;
Eo < −650,
para position. No phenoxy radical intermediate is involved for the oxygenation of the phenolate anion with
Eo > −645 Å mV.
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Takayoshi Soma, Toschitake Iwamoto
1994 Volume 23 Issue 4 Pages
821-824
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The title complexes in the compositions 2Ag(CN)·Cd(CN)
2·3(4-Mepy) and 3Ag(CN)·Cd(CN)
2·4(4-Mepy) crystallize from the same mother solution with the supramolecular structures remarkably different from each other. The former is a clathrate accommodating a guest 4-Mepy in the interwoven double network host. The latter host is comprised of –Cd(4-Mepy)
4–NC–Ag(CN)Ag–CN– linear chains among which discrete [Ag(CN)
2]
− anions are incorporated.
View full abstract
