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Toshiro Yokoyama, Masatoshi Kanesato, Testuo Kimura, Toshishige M. Suz ...
1990 Volume 19 Issue 5 Pages
693-696
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Lysine derivative consisting of amine-
N,
N,
N-triacetic acid and spacer moiety has been immobilized onto cross-linked polystyrene beads by one-step reaction. The metal ion exchange property and selectivity of the newly prepared resin for some trivalent and divalent metal ions have been studied.
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Inés Tapia, Victoria Alcazar, Joaquín R. Moran, Cruz Cab ...
1990 Volume 19 Issue 5 Pages
697-700
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The pyruvic acid dimethyl hydrazone can be easily prepared in ether. This compound, after deprotonation with alkyllithium, forms a strong nucleophile which on treatment with electrophiles and acidic work up yield α-ketoacids, α-hydroxybutenolides or α,γ-diketoacids.
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Mitsutoshi Okano, Kunio Mochida
1990 Volume 19 Issue 5 Pages
701-704
Published: 1990
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Cyclic voltammograms of Me(GeMe
2)
nMe n = 2–6 and (GeMe
2)
6 were recorded. The data showed that HOMO moves up more largely than LUMO moves down as the polygermane chain elongates. UV spectra were also measured. Examination of UV data and the oxidation potentials for Me(GeMe
2)
6Me and (GeMe
2)
6 suggested that (GeMe
2)
6 is stabilized by 2.3 kcal mol
−1.
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Hiroaki Wada, Mitsuko Onoda
1990 Volume 19 Issue 5 Pages
705-706
Published: 1990
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A new ternary sulfide compound AgTaS
3 has been prepared by a sealed silica tube method at 500 °C. The crystal structure has been determined by X-ray powder and electron diffraction. It was found that AgTaS
3 crystallizes in the orthorhombic system, space group Cmc2
1 with unit cell dimensions of a = 3.3755 Å, b = 14.0608 Å, c = 7.7486 Å.
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Akira Sekiya, Masanori Tamura
1990 Volume 19 Issue 5 Pages
707-710
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Long chain perfluoroalkyl groups were introduced to polyamine derivatives which had different chain length and Langmuir–Blodgett films of these amphiphiles were prepared. When pentaethylenehexamine was used as polyamine derivative, stable surface monolayers were formed and properties of the LB films were similar to the polymer LB films, however, less stable surface monolayer was formed as chain length became shorter.
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Hiroki Kimoto, Kazuhiko Saigo, Masaki Hasegawa
1990 Volume 19 Issue 5 Pages
711-714
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The potential energy calculation for the hypothetical crystal structures of two chiral salts was carried out by using the program WMIN. The calculation revealed that the most stable structure of the chiral salts belonged to the space group
P2
12
12
1, which was in agreement with the real structure.
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Yusaku Takita, Hiroshi Yamada, Masayo Hashida, Tatsumi Ishihara
1990 Volume 19 Issue 5 Pages
715-718
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CCl
2FCClF
2 was converted to C
2H
2F
2 and CH
4 over Pd/TiO
2 at 420–820 K in the presence of hydrogen. C
2H
2F
2 and C
2H
3F
3 were mainly formed over Pt/TiO
2 at 520–570 K and dechlorination to CF
3Cl took place over Ni/TiO
2 and Co/TiO
2 at 470–620 K. The CeO
2/TiO
2 catalyst and the catalyst containing La themselves reacted with CFC113 to give CeF
3/TiO
2 and LaF
3/TiO
2 after the reaction at 820 K, respectively. MnTiO
3 catalyzed the reaction to C
2F
3Cl at relatively high temperatures of 770–820 K.
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Kazumi Yamaguchi, Yosihiro Kurasawa, Kazuaki Yokota
1990 Volume 19 Issue 5 Pages
719-722
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Polyfunctional δ-Lactones were prepared conveniently by successive addition of α-alkyl acrylates and aldehydes to the Grignard reagent. The intermediate of the reaction is anionic dimer of α-alkyl acrylate which can react with various electrophiles.
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Fuyuhiko Matsuda, Teruyo Matsumoto, Masako Ohsaki, Yoshio Ito, Shiro T ...
1990 Volume 19 Issue 5 Pages
723-724
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The title synthesis could be achieved by featuring highly diastereoselective formation of a cyanohydrin acetate from an aldehyde under the phase-transfer conditions.
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Kazuhisa Hiratani, Kazuhiro Taguchi
1990 Volume 19 Issue 5 Pages
725-728
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N,
N′-Bis(8-quinolyl)glutaramide was found to be an excellent Cu(II) carrier through chloroform liquid membrane. It can selectively and efficiently transport only Cu(II) from aqueous solution containing Cu(II), Zn(II), Ni(II), and Co(II).
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Masahiro Mikuriya, Shinji Shigematsu, Kouichi Kawano, Tadashi Tokii, H ...
1990 Volume 19 Issue 5 Pages
729-732
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A manganese(IV) complex with
N-salicylidene-2-hydroxy-5-chlorobenzylamine (H
2L), Mn(L)
2·2THF (THF = tetrahydrofuran) has been prepared and characterized by X-ray structure analysis, magnetic susceptibilities (80–300 K), EPR and electronic spectra.
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Hirofumi Ohta, Yasuyuki Sakata, Toshiyuki Takeuchi, Yasutaka Ishii
1990 Volume 19 Issue 5 Pages
733-736
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Periodic acid (H
5IO
6) in combination with sodium bisulfite was found to be a prominent reagent to convert simple and functionalised olefins into the corresponding iodohydrins in fair to good yields under mild conditions. Allylic alcohols gave iodohydrins whose orientation obeyed anti-Markovnikov rule in contrast to olefins which gave Markovnikov products.
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Eiji Hayashi, Haruhiko Fukaya, Takashi Abe, Kota Omori
1990 Volume 19 Issue 5 Pages
737-738
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Some new optically active nitrogen containing perfluorocarboxylie acids, (+)- and (−)-perfluoro(2-dialkylamino propionic acids), have been obtained by the optical resolution of perfluoro(2-dialkylamino-propionic acids).
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Takaji Fujiwara, Naoki Tanaka, Shoichi Kobayashi
1990 Volume 19 Issue 5 Pages
739-742
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Crystal and molecular structure of 13.75 hydrate of cycloamylose, δ-cyclodextrin, was studied by X-ray structure analysis. δ-cyclodextrin is not a doughnut-shaped molecule but rather elliptic, boat-shaped one.
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Kahee Fujita, Tsutomu Tahara, Toshitaka Koga
1990 Volume 19 Issue 5 Pages
743-746
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Specifically modified linear oligosaccharides were prepared by enzymatic hydrolyses of modified γ-cyclodextrins with porcine pancreatic amylase.
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Naoki Sugimoto, Muneo Sasaki, Ryszard Kierzek, Douglas H. Turner
1990 Volume 19 Issue 5 Pages
747-748
Published: 1990
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The opening reaction of the circular form of the intervening sequence from
Tetrahymena thermophila by the dinucleotide CU has been studied in the presence of some deoxyoligonucleotides. The results indicate that d(AGAG) does not inhibit the reaction, but d(CTCT) does. The oligomer, d(TGCA) also inhibits the reaction and the inhibition largely depends on the Mg
2+ concentration.
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Hiroshi Morita, Etsuko Kishi, Koichi Takeya, Hideji Itokawa, Osamu Tan ...
1990 Volume 19 Issue 5 Pages
749-752
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A new C
19-skeleton quassinoid, named longilactone and three new quassinoids, 13,21-dihydroeurycomanone, 13β,21-dihydroxyeurycomanone and 14,15β-dihydroxyklaineanone were isolated from the roots of
Eurycoma longifolia and their structures were established by the spectral evidences.
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Masataka Yokoyama, Naoyuki Yamada, Hideo Togo
1990 Volume 19 Issue 5 Pages
753-756
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A ribonimido-1,4-lactone reacts with electron-deficient alkenes to give the corresponding spiro furactofuranosyl isoxazolidines regio- and stereoselectively via tandem Michael addition-1,3-dipolar cycloaddition. The spiro sugar isoxazolidines formed are converted into the corresponding pyrrolidines by reduction.
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Satoru Murata, Akira Tamatani, Kaoru Suzuki, Masahiro Miura, Masakatsu ...
1990 Volume 19 Issue 5 Pages
757-760
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The oxidation of 4-substituted
N,
N-dialkylanilines with molecular oxygen using a catalytic amount of cobalt(II) chloride efficiently proceeds in the presence of acetic anhydride to give
N-alkylacetanilides in good yields along with
N-alkylformanilides.
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Kazunori Tsushima, Akio Murai
1990 Volume 19 Issue 5 Pages
761-764
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2-Heptenolide was smoothly transformed into the α,β,γ,δ-dienol triflate, which was reacted with lithium dialkylcuprates to afford α-alkylated oxocenes in good yields. The methodology was applied effectively to the synthesis of (+)-lauthisan.
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Fujio Abe, Teruyuki Hayashi, Masato Tanaka
1990 Volume 19 Issue 5 Pages
765-768
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Active methylene compounds undergo reductive alkylation with aldehydes when heated at 135–230 °C under synthesis gas of 100 atm in the presence of ruthenium carbonyl.
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Yasuo Yoshida, Yoshikazu Kimura, Masao Tomoi
1990 Volume 19 Issue 5 Pages
769-772
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Cross-linked styrene/2-(4-chlorophenyl)propene copolymergrafted tetraphenylphosphonium salt was an effective and reusable catalyst for the reaction of aromatic chlorides with anhydrous potassium fluoride to afford the corresponding aromatic fluorides in good yields.
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Akio Yuchi, Manabu Hirai, Hiroko Wada, Genkichi Nakagawa
1990 Volume 19 Issue 5 Pages
773-776
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Higher stability for lighter lanthanoid ions found in the complexation with 1,2-bis(o-aminophenoxy)ethane-
N,
N,
N′,
N′-tetraacetic acid is ascribed to its relatively large cavity size and structural rigidity.
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Isao Shimizu, Hiroyuki Yamazaki
1990 Volume 19 Issue 5 Pages
777-778
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Reaction of the optically active alkenyloxirane with formic acid in the presence of palladium(0)-phosphine catalyst gave the homoallylic alcohol selectively, which was converted to (−)-nupharamine.
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Shiyoshi Yokoyama, Ayumi Yoshida, Tomoko Ueda, Masayoshi Watanabe, Koh ...
1990 Volume 19 Issue 5 Pages
779-782
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Ultra-thin films of poly(vinylenebenzothiazole) (PVBT) were formed at the air/water interface. The resulting PVBT thin films had a repeatable and finely controllable thickness; the per layer thickness of PVBT multilayers was 36 Å. The films remained fairly stable when subjected to heat treatment up to 200 °C. They also had good solvent resistance.
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Takashi Keumi, Masakazu Shimada, Masahiro Takahashi, Hidehiko Kitajima
1990 Volume 19 Issue 5 Pages
783-786
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2-(Trifluoroacetoxy)pyridine (TFAP) is useful for trifluoroacetylating arenes under the Friedel–Crafts conditions. Benzene, alkylbenzenes, naphthalene, and dibenzofuran have reacted with TFAP in the presence of aluminum chloride in dichloromethane to give the corresponding trifluoromethyl aryl ketones in good isolated yields.
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Gen-etsu Matsubayashi, Seiji Ohta
1990 Volume 19 Issue 5 Pages
787-790
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Ferrocene and its alkyl-substituted derivatives intercalate into the lamellar VOPO
4 compound, where the ferrocenium and related cation species are located in the interlayer space of the V(IV)/V(V) moieties. Based on powder X-ray diffraction patterns and ESR spectra, arrangements of the cations and electronic interactions between the cations and VOPO
4 moieties are discussed.
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Masaaki Miyashita, Masahide Hoshino, Akira Yoshikoshi
1990 Volume 19 Issue 5 Pages
791-794
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The total synthesis of diarylheptanoids isolated from the male flowers of
Alnus sieboldiana, yashabushiketol, yashabushiketodiol A, yashabushiketodiol B, and yashabushitriol, has been achieved in short steps by employing the organoselenium-mediated reduction of epoxy ketone as key steps.
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Yusuke Izumi, Yuuichi Satoh, Kazuo Urabe
1990 Volume 19 Issue 5 Pages
795-796
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The Keggin-type heteropoly anions which contain Mo and V as addenda atoms showed a noticeable promoting effect on the catalysis of Pd in the reductive carbonylation of nitrobenzene to form
N-phenylcarbamate in the presence of alcohol in dimethoxyethane solvent.
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Ying Hu, Mitsunari Uno, Akira Harada, Shigetoshi Takahashi
1990 Volume 19 Issue 5 Pages
797-798
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In the presence of cyclodextrins, the ring-opening reaction of epoxides with NaBH
4 in aqueous media proceeded smoothly with high regio-selectivity, and kinetic resolution of racemic epoxides was observed.
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Sadayuki Himeno, Keiko Miyashita, Atsuyoshi Saito, Toshitaka Hori
1990 Volume 19 Issue 5 Pages
799-802
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A yellow 12-molybdosulfate(VI) complex was isolated as the tetrabutylammonium (Bu
4N
+) salt from a 0.05 M (M = mol dm
−3) Mo(VI)-0.2 M H
2SO
4-50% (v/v) CH
3COCH
3 system containing traces of V(V). The IR and UV-visible spectroscopic and voltammetric characteristics were elucidated.
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Hiroshi Hirota, Tsutomu Mitsuhashi
1990 Volume 19 Issue 5 Pages
803-806
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The tricyanomethanide ion C(CN)
3− was found to serve as an efficient leaving group anion to generate unstable carbocations such as
t-cumyl and
t-butyl cations, the ability of carbon-terminated leaving groups so far examined being in the order C(CN)
2N=NC
6H
4NO
2-
p << C(CN)
3 << C(CN)
2NO
2.
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Takatsugu Suzuki, Hiroki Hotta, Tetsutaro Hattori, Sotaro Miyano
1990 Volume 19 Issue 5 Pages
807-810
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High levels of asymmetric induction (up to 98% optical yield) were achieved in the joining of two naphthalene rings by the nucleophilic displacement of 1-menthoxyl group of 1-(−)-menthoxy-2-naphthoates (
1) with 1-naphthyl Grignard reagnts. Also reported is a convenient preparation of the prerequisite
1 via treatment of methyl 1-methoxy-2-naphthoate with sodium (−)-menthoxide in DMF.
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Takumi Mizuno, Takitaro Yamaguchi, Ikuzo Nishiguchi, Tsuneo Okushi, Ts ...
1990 Volume 19 Issue 5 Pages
811-812
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S,
S-Dialkyl dithiocarbonates were easily synthesized in good to excellent yields by the reaction of carbon monoxide with sulfur in the presence of water and triethylamine, followed by alkylation of the resulting salts with alkyl halides.
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Haruhiko Fukaya, Takashi Abe, Eiji Hayashi
1990 Volume 19 Issue 5 Pages
813-814
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Some new nitrogen-containing perfluoroalkyl iodides were synthesized directly by the reaction of corresponding perfluoroacid fluorides with lithium iodide in high yield.
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Naoki Toshima, Tetsu Yonezawa, Masafumi Harada, Kiyotaka Asakura, Yasu ...
1990 Volume 19 Issue 5 Pages
815-818
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The colloidal dispersions of the palladium–platinum bimetallic clusters were prepared by refluxing their salts in water/ethanol in the presence of poly(
N-vinyl-2-pyrrolidone) under nitrogen. They work as catalysts for partial hydrogenation of diene. The highest activity was achieved by the bimetallic clusters with the molar ratio of Pd/Pt = 4/1, the EXAFS spectra and the TEM photographs of which strongly suggest the alloy formation with a core structure.
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Naoki Toshima, Toshiharu Teranishi, Hiroyuki Asanuma, Yasukazu Saito
1990 Volume 19 Issue 5 Pages
819-822
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Platinum cluster catalysts supported on chelate resin–metal complexes were prepared by reduction of platinum ions immobilized on the supports which were characteristic of high porosity. The initial rate of hydrogen uptake in the hydrogenation of olefin or diene over the catalysts increases with the surface area of the resin supports.
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Hiroyuki Aota, Hirofumi Fujii, Akira Harada, Mikiharu Kamachi
1990 Volume 19 Issue 5 Pages
823-826
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Polyacrylates having tetraphenylporphinatocopper(II) or tetraphenylporphinatovanadyl(II) as their pendant groups have been prepared by the radical polymerization of the corresponding acrylates. The decrease in the molar extinction coefficient of the Soret band and Q-band was observed, and in addition, new absorption band at 638 nm appeared in the visible spectra of the polymers. This shows that porphyrin moieties bound to a polymer chain are probably forced to make some electronic interactions due to their connection with a polyacrylate chain.
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Masaaki Yoshifuji, Hideki Yoshimura, Kozo Toyota
1990 Volume 19 Issue 5 Pages
827-830
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The reaction of dichlorocarbene with (
E)- and (
Z)-2-phenyl-(2,4,6-tri-
t-butylphenyl)phosphaethylenes gave
trans-dichlorophosphirane which was converted to phosphaallene with
t-butyllithium, while 2,2-diphenylphosphaethylene gave a vinylphosphaindane derivative.
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Kazuhiko Saigo, Yukihiko Hashimoto, Nobuhiro Kihara, Hideyuki Umehara, ...
1990 Volume 19 Issue 5 Pages
831-834
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Acyclic dithioacetals of ketones are easily hydrolyzed with the action of gallium chloride in the presence of A) water or B) methanol with bubbling oxygen to give the parent carbonyl compounds in high yields.
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Seiji Shinkai, Toshio Otsuka, Kiyosi Fujimoto, Tsutomu Matsuda
1990 Volume 19 Issue 5 Pages
835-838
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“Cone” and “partial cone” isomers of 25,27-bis(2-pyridylmethoxy)-26,28-bis(ethoxycarbonylmethoxy)-
p-
t-butylcalix[4]arene (
3) were isolated by a TLC method and the structures were identified by
1H NMR. From two-phase solvent extraction of alkali picrates, the size of the ionophoric cavities was estimated to be in the order, partial-cone-
3 > tetrakis(ethoxycarbonylmethoxy)-
p-
t-butylcalix[4]arene (cone) > cone-
3. This is the first quantitative estimation of the ionophoricity of conformationally-isomeric calix[4]arenes.
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