-
Shu Kobayashi, Teruaki Mukaiyama
1986 Volume 15 Issue 11 Pages
1805-1808
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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γ-Acyl-δ-lactones are prepared in high yields with high stereoselectivities by the trityl perchlorate catalyzed tandem Michael-aldol reaction between α,β-unsaturated ketones, ketene silyl acetals, and aldehydes.
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Takeshi Yura, Nobuharu Iwasawa, Richard Clark, Teruaki Mukaiyama
1986 Volume 15 Issue 11 Pages
1809-1812
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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In the presence of chiral diamines, the reaction between tin(II) enolates of ketones or 3-acyl-2-oxazolidones and thiosulfonates proceeds smoothly to give the corresponding β-keto sulfides with high enantioselectivity. Further, optically active epoxides are prepared from these β-keto sulfides.
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Yoo Tanabe, Teruaki Mukaiyama
1986 Volume 15 Issue 11 Pages
1813-1816
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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The crossed Claisen ester condensation between methoxymethyl ester and methyl ester promoted by the combined use of titanium(IV) bistriflate and tertiary amine has been established.
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Teruaki Mukaiyama, Masanori Tamura, Shu Kobayashi
1986 Volume 15 Issue 11 Pages
1817-1820
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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In the presence of a catalytic amount of trityl salts, silyl enol ethers of thioesters stereoselectively react with α,β-unsaturated ketones to afford the Michael adducts in high yields. 5-Oxocarboxylic acid ester derivatives, useful synthetic precursors of various naturally occurring compounds, are stereoselectively obtained by this procedure.
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Teruaki Mukaiyama, Yukihiro Sagawa, Shu Kobayashi
1986 Volume 15 Issue 11 Pages
1821-1824
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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In the presence of a catalytic amount of trityl perchlorate, the double Michael reaction of α,β-unsaturated ketones with siloxydienes smoothly proceeds to afford six-membered ring systems stereoselectively in good yields. Decalin derivatives are also obtained according to this procedure.
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Tsuyoshi Nakajima, Kenji Nakane, Masayuki Kawaguchi, Nobuatsu Watanabe
1986 Volume 15 Issue 11 Pages
1825-1828
Published: November 05, 1986
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Graphite intercalation compound(GIC) of titanium fluoride has been prepared in fluorine atmosphere. The GIC’s prepared were mainly stage 2 compounds with repeat distance, 11.28–11.59 Å and composition, C
11−15TiF
4.5−6.2. ESCA spectrum indicates that intercalated TiF
62− anions are in bridged state.
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Junzo Otera, Yoshihisa Niibo, Kazuhiro Okuda
1986 Volume 15 Issue 11 Pages
1829-1832
Published: November 05, 1986
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γ-Methyl-substituted allylic ethers proved to be converted into β-substituted dienes exclusively on treatment with t-BuOK in refluxing THF or cyclohexane.
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Akihiko Ouchi, Motoo Tanaka, Takayoshi Nakamura, Mutsuyoshi Matsumoto, ...
1986 Volume 15 Issue 11 Pages
1833-1836
Published: November 05, 1986
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Mixed Langmuir–Blodgett (LB) films of (10-butyl-9-anthryl)-3-propanoic acid (
1) and arachidic acid were prepared and their UV-Vis spectra were measured. Photodimerization of
1 in these LB films was successfully performed with monochromatic light.
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Eiichi Narita, Ken-ichi Akito
1986 Volume 15 Issue 11 Pages
1837-1840
Published: November 05, 1986
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Zeolite ZSM-5 was easily synthesized by using acid-treated rocks such as acid clay and cristobalite rock in place of some synthetic chemicals. Although the crystal growth of existing α-quartz was also observed with the crystallization of ZSM-5, it can be inhibited by decreasing the alkalinity of a reaction mixture.
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Toshie Harazono, Katsumi Tanaka, Yoshito Takeuchi, Norihiro Kakimoto
1986 Volume 15 Issue 11 Pages
1841-1844
Published: November 05, 1986
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73Ge relaxation in GeH
4, GeCl
4, and GeBr
4, and
1H relaxation in GeH
4 have been studied, and found to contain a scalar coupling mechanism in a spin-spin relaxation. Furthermore, a scalar spin coupling constant, J(
73Ge–
35Cl) = 24Hz, was obtained.
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Yoshio Hori, Katsuhiro Fujimoto, Shin Suzuki
1986 Volume 15 Issue 11 Pages
1845-1848
Published: November 05, 1986
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Photocatalytic reactions of NO at ppm level with O
2 were studied in the presence of TiO
2 (anatase), PbO, and ZnO using a chemical luminescence NOX analyzer and a second derivative spectrometer. The rate of oxidation of NO was very high, e.g. 1930% cm
−2 h
−1 in a photocatalytic reaction on TiO
2 (anatase). Photoadsorption of NO
X also took place on these metal oxides.
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Kazuhiro Maruyama, Atsuhiro Osuka, Katsuhiko Nakagawa, Kenzo Tabuchi, ...
1986 Volume 15 Issue 11 Pages
1849-1852
Published: November 05, 1986
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Irradiation of 2-substituted 4-alkylidene-2,3-epoxy-1-tetralone results in the rearrangement to 3-(2-oxoalkylidene)-1-indanone or the E-Z isomerization around the double bond. These photoreactions are suggested to occur from the (π,π
*) triplet excited state.
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Atsuhiro Osuka, Kazuhiro Maruyama
1986 Volume 15 Issue 11 Pages
1853-1856
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Argon ion laser excitation of covalently linked porphyrin–tryptophan compound in the presence of 1,4-benzoquinone in benzene-d
6 resulted in strong
1H-NMR polarizations of tryptophan moiety. These CIDNP effects are reasonably explained by the mechanism involving the secondary electron transfer from tryptophan moiety to porphyrin cation radical as the key step.
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Yoshinori Naruta, Yutaka Nishigaichi, Kazuhiro Maruyama
1986 Volume 15 Issue 11 Pages
1857-1860
Published: November 05, 1986
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Various allylstannanes are conveniently prepared in quantitative yields by means of ultrasound-promoted Barbier-type reaction from chlorotributylstannane and allyl halides in a stereoselective manner.
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Naoko Okada, Hideki Yamochi, Fumihiko Shinozaki, Kokichi Oshima, Gunzi ...
1986 Volume 15 Issue 11 Pages
1861-1864
Published: November 05, 1986
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A series of tetrakis(n-alkyltelluro)tetrathiafulvalene (TTeC
n-TTF) was synthesized where n ranges from 1 to 18. Some chemical and physical properties of TTeC
n-TTF were studied and compared with those of the sulfur analogues; tetrakis(n-alkylthio)tetrathiafulvalene (TTC
n-TTF).
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Fumio Moriwaki, Akihiko Ueno, Tetsuo Osa, Fumio Hamada, Koichi Murai
1986 Volume 15 Issue 11 Pages
1865-1868
Published: November 05, 1986
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γ-Cyclodextrin bearing two anthracene moieties (
1) exhibited an exciton coupling band of R-helicity as well as excimer emission. Photoirradiation caused dimerization of the appended moieties, converting
1 from flexible host to rigid host.
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Hitomi Uno, Takeshi Endo
1986 Volume 15 Issue 11 Pages
1869-1870
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Polymer containing sulfonium salt structure, which was obtained by the polymerization of p-vinylbenzyl tetramethylenesulfonium hexafluoroantimonate, was found to behave as a polymeric thermal latent catalyst for the polymerization of bicyclo ortho ester and lead to the grafted polymer.
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Takashi Watanabe, Sumiko Kaizu, Tetsuo Koshijima
1986 Volume 15 Issue 11 Pages
1871-1874
Published: November 05, 1986
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Partially enzyme-degraded lignin–carbohydrate complex (LCC) was subjected to acetylation, followed by oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ), which is comfirmed to decompose α - and conjugated γ-ether to release the corresponding alcohol. Methylation analysis of the liberated sugar acetates showed that glucomannan preferably binds to lignin at C-6 position of mannose and glucose residues and that arabinoglucuronoxylan at C-2 and C-3 position of xylose.
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Akito Ugawa, Kyuya Yakushi, Haruo Kuroda, Atsushi Kawamoto, Jiro Tanak ...
1986 Volume 15 Issue 11 Pages
1875-1878
Published: November 05, 1986
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(BEDT-TTF)
2IAuBr was synthesized and the crystal structure of this material was determined to be of the β″- type, being isomorphous to β″-(BEDT-TTF)
2AuBr
2. The polarized reflectance spectrum indicates that the electronic structure of this salt is of considerable two-dimensional character.
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Takayoshi Nakamura, Hiroshi Hirota, Chiaki Kuroda, Takeyoshi Takahashi
1986 Volume 15 Issue 11 Pages
1879-1882
Published: November 05, 1986
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Direct trapping of the intermediate, produced by anionic oxy-Cope rearrangement of (1
R,4
S,6
S)-4-alkoxy-1-ethenyl-3-methyl-6-(1-methylethenyl)-2-cyclohexen-1-ol, with ethyl bromoacetate gave ethyl [3
S,7
S,1(10)
E,4
Z]-3-alkoxy-6-oxo-13-nor-1(10),4-germacradien-12-oate stereoselectively, which was converted into a natural (−)-4,5-
cis-3β-hydroxygermacranolide.
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Takayuki Kawashima, Yasuaki Miki, Naoki Inamoto
1986 Volume 15 Issue 11 Pages
1883-1884
Published: November 05, 1986
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The title compounds (
1) were refluxed in hexanol to give the corresponding 1,4-pentadienylphosphinates, which seem to be formed via transient “phospha-allene derivatives”, together with Michael adducts of alcohol to the triple bond of
1.
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Yuji Maki, Gotaro Watanabe, Akio Saito, Tanetoshi Koyama, Kyozo Ogura
1986 Volume 15 Issue 11 Pages
1885-1888
Published: November 05, 1986
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Farnesyl pyrophosphate (FPP) synthetase catalyzed the condensation of geranyl pyrophosphate (GPP) with 4-methyl-4-pentenyl pyro phosphate in the presence of Ni
2+ to give an unexpected product, homofarnesyl pyrophosphate having an exomethylene group, together with
Z-homofarnesyl pyrophosphate.
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Kenichi Nakabayashi, Susumu Toki, Setsuo Takamuku
1986 Volume 15 Issue 11 Pages
1889-1892
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Triplet lifetimes of cyclic olefins and dienes measured by pulse radiolysis are dependent on the ring size which affects the most stable conformation of the triplet. In the case of cyclic nonconjugated dienes, an intramolecular biradical formation is an important decay process when the reaction is sterically allowed.
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Akira Harada, Mizutomo Takeuchi, Shigetoshi Takahashi
1986 Volume 15 Issue 11 Pages
1893-1894
Published: November 05, 1986
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One-to-one inclusion compounds were obtained in high yields by the treatment of β- and γ-cyclodextrins(CD) with di-μ-chloro-bis(η
3-allyl)dipalladium complex and its analogues. The formation of inclusion compounds is selective.
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Takashi Ishihara, Manabu Kuroboshi, Yoshiji Okada
1986 Volume 15 Issue 11 Pages
1895-1896
Published: November 05, 1986
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A variety of alkenes and alkynes efficiently undergo the perfluoroalkylation with
F-alkyl iodides in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(0) in hexane to give good yields of the corresponding
F-alkylated alkyl and alkenyl iodides, respectively.
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Kenso Soai, Takeshi Isoda, Hitoshi Hasegawa, Miyuki Ishizaki
1986 Volume 15 Issue 11 Pages
1897-1900
Published: November 05, 1986
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Effects of the metallic salts and the reducing reagents in the diastereoselective reduction of chiral α-keto amides derived from (S)-proline methyl ester were examined. Lithium borohydride afforded (S)-α-hydroxy acids, whereas diisobutylaluminum hydride afforded (R)-isomers. In the presence of lithium bromide, reduction with LiBH
4 afforded (S)-mandelic acid in over 80% e.e.
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Ryoki Nomura, Takao Wada, Yasuhiro Yamada, Haruo Matsuda
1986 Volume 15 Issue 11 Pages
1901-1904
Published: November 05, 1986
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Triphenylantimony dicarboxylates (Ph
3Sb(O
2CR)
2, where R=Me, CF
3, Ph and CH
2NH-Z) readily reacted with amines (R′NH
2, where R′=
n-C
6H
13,
s-Bu, C
6H
11, and Ph) to afford corresponding amides and triphenylstibine oxide in fairly good yields. The amidation of RCO
2H with R′NH
2 was also catalyzed by the orgnoantimony compounds.
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Fumio Toda, Koichi Tanaka
1986 Volume 15 Issue 11 Pages
1905-1908
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Partially resolved tertiary acetylenic alcohols and secondary alcohols were easily resolved completely by complexation with achiral amines such as 1,4-diazabicyclo[3.3.3]octane (DABCO),
N,
N′-dialkylpiperazine,
N,
N,
N′,
N′-tetramethylethylenediamine, and pyrazine, to give optically pure enantiomers. Interestingly, DABCO formed more stable complex with optically pure enantiomers but the other amines formed more stable complex with racemic compounds.
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Fumio Toda, Yasunori Tagami, Thomas C. W. Mak
1986 Volume 15 Issue 11 Pages
1909-1912
Published: November 05, 1986
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The title host compounds have been utilized in the efficient separation of isomeric alcohols by selective complexation. X-Ray analysis has shown that their 1:2 crystalline adducts with cresols comprise centrosymmetric guest–host–guest aggregates consolidated by O–H···O hydrogen bonding.
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Fumio Toda, Yasunori Tagami, Hao Quan, Fan Hai-fu, Thomas C. W. Mak
1986 Volume 15 Issue 11 Pages
1913-1916
Published: November 05, 1986
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X-Ray analysis of the title complex has shown that the three molecular components are linked by hydrogen bonds to form helical chains parallel to the a axis. The (
R)-(+)-2,2′-dihydroxy-1,1′-binaphthyl molecule adopts a transoid conformation with a torsion angle of −95(1)° about the C–C bond joining the aromatic rings.
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Bunsho Ohtani, Koji Nakagawa, Sei-ichi Nishimoto, Tsutomu Kagiya
1986 Volume 15 Issue 11 Pages
1917-1920
Published: November 05, 1986
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Electrolysis of the alcohol solution of amines in a one-chamber cell resulted in N-alkylation of the amines with sufficient current efficiencies. Platinum black particles suspended in the reaction mixture enhanced the efficiency due to their catalytic role for hydrogenation of a Schiff base intermediate.
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Koji Tamura, Masahiro Kudo, Masanori Owari, Yoshimasa Nihei
1986 Volume 15 Issue 11 Pages
1921-1924
Published: November 05, 1986
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X-Ray photoelectron diffraction patterns from platinum atoms deposited on TiO
2 (110) surface were measured, and the structural analysis was made by means of the single scattering calculation. It is found that the structural model of platinum particles based on the (111) surface of fee crystal explains the experimental results very well.
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Makoto Nitta, Nobuhiro Kanomata
1986 Volume 15 Issue 11 Pages
1925-1928
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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3-Arylcyclohepta[
d]isoxazolylium tetrafluoroborates were synthesized by the cycloaddition of tricarbonyl(2-5-η-2,4,6-cycloheptatrienone)iron with aromatic nitrile oxides followed by several reactions. The pK
R+ values of these ions are less than +1.0 showing that the stability of the tropylium ions is much decreased by the fusion of the isoxazole ring.
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Ichiro Hirao, Masahide Ishikawa, Kin-ichiro Miura
1986 Volume 15 Issue 11 Pages
1929-1932
Published: November 05, 1986
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Tetra to undecaribonucleotides of the leader sequence in messenger RNA(mRNA) of f1 coat protein were synthesized on a polystyrene solid support through simple phosphotriester approach.
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Yasujiro Kawabata, Mutsuyoshi Matsumoto, Motoo Tanaka, Hisao Takahashi ...
1986 Volume 15 Issue 11 Pages
1933-1934
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Stable condensed monolayers of four different amphiphilic derivatives of β-cyclodextrin were formed on a water subphase. The base of the cylindrical cyclodextrin residue was found to be parallel to the water surface. Langmuir–Blodgett films were obtained for three derivatives.
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Yuji Ohgomori, Shoichiro Mori, Shin-ichi Yoshida, Yoshihisa Watanabe
1986 Volume 15 Issue 11 Pages
1935-1938
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Synthesis of ethylene glycol from synthesis gas via rhodium catalysis in the presence of a pyrrolidone, which has a stronger electron donative substituent than methyl or has two 2-oxopyrrolidinyl groups in the molecule was examined. These compounds facilitate the formation of ethylene glycol.
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Yashwànt D. Vankar, Surendra P. Singh
1986 Volume 15 Issue 11 Pages
1939-1942
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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A variety of α-nitroepoxides have been found to undergo conversion to the corresponding 1,2-diketones with Pd(PPh
3)
4. Two examples form α-nitroketones instead of 1,2-diketones.
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Hiroshi Hara, Toshiichi Okita
1986 Volume 15 Issue 11 Pages
1943-1946
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Photochemical oxidation of sulfite in concentrated solution of ammonium nitrate was studied with a mercury lamp and solar radiation as a chemical model system of the water-film on the atmospheric nitrate aerosol. Sulfite was found to be photo-oxidized with first-order reaction kinetics. Temperature and nitrate concentration dependences of the rate constant suggested that low temperature hardly decreased the atmospheric significance of this reaction and that the oxidation favored high conentration.
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Yohmei Okuno, Kumiko Tonosaki, Takayuki Inoue, Osamu Yonemitsu, Takuma ...
1986 Volume 15 Issue 11 Pages
1947-1950
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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The employments of dianion such as SO
42− and nucleosides as a substrate resulted prevalent formation of platinum blues at 75 °C for 20 h. Gel filtration method was successfully used for purification of the products. It is notable that green species rather than blue complexes gave remarkably high antitumor activity against L1210 cells.
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Susumu Kaneko, Kohei Uosaki, Hideaki Kita
1986 Volume 15 Issue 11 Pages
1951-1954
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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When the potential of
p-GaAs electrode was pulsed from −1.0 V (vs. Ag/AgCl) to a potential more positive than ca. −0.35 V, PL intensity increased sharply and the PL spectrum broadened but the intensity declined and the spectrum shrank gradually with time. These results are explained by the bandedge shift during the photoelectrochemical hydrogen evolution.
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Kiyoshi Otsuka, Takayuki Komatsu
1986 Volume 15 Issue 11 Pages
1955-1958
Published: November 05, 1986
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Aromatic hydrocarbons were synthesized by passing CH
4 and O
2 through the two catalyst beds, i.e., the catalyst active for oxidative coupling of CH
4 and that for converting light hydrocarbons to aromatics.
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Masanori Wada, Makoto Kumazoe, Yasushi Matsuhiro, Tatsuo Erabi
1986 Volume 15 Issue 11 Pages
1959-1962
Published: November 05, 1986
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Photolysis (>330 nm) of trans-[Ni(CCl=CCl
2)(C
6H
4Y)(PMe
3)
2] (Y= Me-4, Cl-4) resulted in the formation of two isomeric mono-organonickel(II) complexes, trans-[Ni{CCl=CCl(C
6H
4Y)}Cl(PMe
3)
2] and trans-[Ni{C(C
6H
4Y)=CCl
2}Cl(PMe
3)
2], possibly by reductive elimination followed by oxidative addition.
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Masahiro Fujiwara, Akio Baba, Yuri Tomohisa, Haruo Matsuda
1986 Volume 15 Issue 11 Pages
1963-1966
Published: November 05, 1986
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The combination of Ph
4SbI and Bu
3SnI proved to be a new excellent catalyst for effecting cycloaddition reaction of inactive 2,3-disubstituted oxiranes with isocyanates under neutral conditions, yielding oxazolidinones in high yields, while either of both metal iodides had no activity individually.
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Koichi Narasaka, Masayuki Inoue, Tohru Yamada
1986 Volume 15 Issue 11 Pages
1967-1968
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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The Diels–Alder reaction between prochiral dienophiles and cyclopentadiene proceeds in an enantioselective manner by the use of a catalytic amount of a chiral alkoxy titanium(IV) in the presence of Molecular Sieves 4A.
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Koichi Mizuno, Kuniaki Yoshikawa, Naohisa Wakejima, Yoshimitsu Takeuch ...
1986 Volume 15 Issue 11 Pages
1969-1972
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Mixtures of H
2, CO, and CO
2 were produced over a Ni–K/Al
2O
3 catalyst from methanol and water. The composition of the mixtures, in particular the H
2/CO ratio, was extensively varied by changing reaction conditions such as starting ratio of methanol/water.
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Shigeru Nishiyama, Hiroaki Toshima, Shosuke Yamamura
1986 Volume 15 Issue 11 Pages
1973-1976
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Both citreoviridinol and neocitreoviridinol, metabolites of
Penicillium citreo-viride B., have been synthesized from the known synthetic intermediate of citreoviridin, in regio- and stereoselective manner.
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Seiichiro Ogawa, Hiroyasu Sugizaki
1986 Volume 15 Issue 11 Pages
1977-1980
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Acarviosin analogue, 4-deoxy-4-{[(1
S)-(1,4/5,6)-4,5,6-trihydroxy-3-hydroxymethyl-2-cyclohexen-1-yl]amino}-
D-mannopyranose, has been synthesized as the octaacetyl derivative by coupling of 1,6:3,4-dianhydro-2-
O-tosyl-3-
D-galactopyranose and the cyclohexenylamine derivative, followed by further transformation.
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Ikuya Matsuura, Yasuhide Utsumi, Miyuki Nakai, Takao Doi
1986 Volume 15 Issue 11 Pages
1981-1984
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Alkali doped ZnO samples were examined as catalysts for the conversion of methane to ethylene and ethane. Among the catalysts tested, 12.5 mol% Li-promoted zinc oxide was the most active and selective for the formation of C
2-hydrocarbons. The highest yield of C
2-compounds was 24.8% and the fraction of ethylene in C
2-compounds was over 80% .
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Masayuki Kuzuya, Masaharu Nakanishi, Sachihiko Nakai
1986 Volume 15 Issue 11 Pages
1985-1988
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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Mechanism for immobilizing an active radical species and its slow release on a novel plasma-driven ultrathin film was proposed with the aid of molecular orbital calculations, which involves the existence of non-optimized weakened σ-bonds in such a ultrathin film and the propensity of their facile bond-cleavages.
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Nobuo Kato, Shinya Tanaka, Hitoshi Takeshita
1986 Volume 15 Issue 11 Pages
1989-1992
Published: November 05, 1986
Released on J-STAGE: March 27, 2006
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The 5-8-5-membered tricyclic diterpene, cycloaraneosene, has been totally synthesized via the stereoselective condensation of two units of optically active iridoids, Cope rearrangement and chemical reduction of the tetrasubstituted C=C bond. The NMR spectrum of synthetic 9
α-hydroxycycloaraneosene was not identical with the congener product, and the natural alcohol is likely to be 8
β-hydroxyl derivative.
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