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Volume 9, Issue 9
Displaying 1-35 of 35 articles from this issue
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Akifumi Ueno, Toshio Sato, Naoyuki Todo, Yoshihide Kotera, Seiji Takas ...1980 Volume 9 Issue 9 Pages 1067-1070
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe catalytic reduction of CO2 to CO by sulfur vapor was studied at the temperatures higher than 650°C over various metal oxides and sulfides, and on the basis of the results from the kinetic studies and the X-ray diffraction measurements, the reaction scheme was tentatively proposed as follows:
metal oxides + S2(g) → metal sulfides + SO2
metal sulfides + CO2 → metal oxides + CO + SO2.View full abstract -
Yasuhiro Nakadaira, Hiroyuki Sakaba, Hideki Sakurai1980 Volume 9 Issue 9 Pages 1071-1074
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS6,6-Dimethyl-6-silafulvene generated from (allyl)(cyclopentadienyl)dimethylsilane reacts with a trapping reagent such as methanol, benzaldehyde, and benzophenone to give (cyclopentadienyl)(methoxy)dimethylsilane, 6-phenylfulvene, and 6,6-diphenylfulvene, respectively. Without a trapping reagent, the silafulvene undergoes dimerization.View full abstract -
Kenji Nomiya, Sadayoshi Sasa, Makoto Miwa1980 Volume 9 Issue 9 Pages 1075-1076
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStepwise replacement of protons in H4[SiMo12O40] by tetrabutylammonium cation and catalysis by the replaced compounds for alkylation of toluene with benzyl chloride have been investigated. Only three-protonated compound showed comparable activity with that of parent one.View full abstract -
Kunio Hiroi, Kumiko Nakazawa1980 Volume 9 Issue 9 Pages 1077-1080
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe asymmetric [2,3] sigmatropic rearrangements of the chiral ammonium chlorides (E)-(3a,b) were achieved upon treatment with t-BuOK followed by acidic hydrolysis of the aminonitriles (5a,b) obtained to give (R)-(+)-2-methyl-2-phenyl-3-butenal (6). The rearrangement of (E)-(3a) at −78° resulted in the highest optical yield (90%) of (R)-(+)-(6). The geometrical isomer (Z)-(3a) underwent the same [2,3] shift under the same conditions to afford (S)-(−)-(6). The mechanism of this asymmetric induction is discussed based on these results.View full abstract -
Masafumi Goto, Michihiro Takeshita, Tomoya Sakai1980 Volume 9 Issue 9 Pages 1081-1084
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSWell resolved 1H- and 13C-NMR signals of the title compounds were assigned with the aid of change in chemical shift by varying the composition of the mixture of FeII and FeIII complexes of an identical set of ligands. Distinct differences in chemical shift between axial and equatorial protons of the chelate rings and 13C-isotropic shifts alternating in sign with each separation from FeIII center by C–C bond were observed.View full abstract -
Yukichi Yoshino, Satoshi Hatazawa, Masami Saito, Akira Ouchi1980 Volume 9 Issue 9 Pages 1085-1088
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn EDTA back-titration of rhodium(III) has been proposed taking advantage of rapid chelation in water-ethanol solutions. The optimum amount of rhodium was 0.5 – 10 mg and the standard deviation was 0.76%. The method is applicable to the analysis of some rhodium(III) complexes.View full abstract -
Nobuo Ishikawa, Tomoya Kitazume, Masao Nakabayashi1980 Volume 9 Issue 9 Pages 1089-1090
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFreeze-dried potassium fluoride was found to be much more effective as a hydrogen-bond forming catalytic reagent for alkylation of protic compounds than usual calcine-dried potassium fluoride. Phenol, thiophenol, aniline, and acetylacetone were easily alkylated with methyl or ethyl iodide in the presence of the reagent. Freeze-dried potassium fluoride, however, had no effect for the fluorination of activated chlorine compounds.View full abstract -
Junzo Otera, Masanobu Shiigi, Yoshikane Kawasaki1980 Volume 9 Issue 9 Pages 1091-1094
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe interactions between glymes (Gly) and dimethyltin dichloride (DMTC) have been studied by 1H NMR spectroscopy. The coexistence of the 1:2 Gly/DMTC complexes with 1:1 complexes was found for the higher members of Gly. Benzene-induced shifts of proton signals of both DMTC and Gly suggest that the complexes possess the methyl groups attached to tin essentially in a trans arrangement.View full abstract -
Heitaro Obara, Jun-ichi Onodera, Fumio Shirasaki1980 Volume 9 Issue 9 Pages 1095-1098
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn connection with the studies on the structure of carthamin (1), dehydro-3,3′ -bis(p-hydroxycinnamoyl)-5,5′-methylenedifilicinic acid, an analog of 1, was synthesized from 2-benzoylphloroglucinol through five steps and its properties were compared with those of 1.View full abstract -
Tetsuya Mimura, Takeshi Nakai1980 Volume 9 Issue 9 Pages 1099-1102
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new, facile procedure is described which allows the regioselective 1,2-carbonyl transposition of Δ2-cyclohexenone systems leading to the positionally isomeric Δ2 -cyclohexenones. The scope and limitation of the method is presented.View full abstract -
Yoshikazu Sugihara, Takashi Sugimura, Ichiro Murata1980 Volume 9 Issue 9 Pages 1103-1106
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS9,10-Benzotetracyclo[5.3.0.02,4.03,5]deca-1(7),9-dien-6-one (2), a valence isomer of benz[a]azulen-9(10H) -one (3), has been synthesized from 5,6-benzobicyclo [3.2.0] hepten-2-one utilizing the oxa-di-π-methane rearrangement.View full abstract -
Nobuo Ishikawa, Akio Takaoka, Hiroshi Iwakiri, Satoshi Kubota, S. R. F ...1980 Volume 9 Issue 9 Pages 1107-1110
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAlkyl 2-chloro-1,2,2-trifluoroethyl ketones and aryl 1,2,2,2-tetrafluoroethyl ketones were respectively prepared by the Friedel–Crafts acylation of trifluoroethene and by the Grignard arylation of N,N-diethyl-1,2,2,2-tetrafluoropropionamide, a hydrolyzed product of hexafluoropropene–diethylamine adduct. These alkyl and aryl polyfluoroalkyl ketones were subjected to base-induced dehydrohalogenation, and resulting trifluorovinyl ketones were hydrolyzed in situ affording α-fluoro-β-ketoesters in good yields.View full abstract -
Tadamasa Terai, Haruo Meguri, Nobuyuki Hamanaka, Takao Matsuzaki, Akio ...1980 Volume 9 Issue 9 Pages 1111-1114
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of grayanotoxin II tetraacetate with UV light in the presence of lead tetraacetate in benzene afforded 1-epi-grayanol A pentaacetate in high yield.View full abstract -
Fumio Kataoka, Shinya Nishida1980 Volume 9 Issue 9 Pages 1115-1118
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStructure-reactivity sequences of two cycloadditions, distinctive in pattern, between cyclopropylethylene and tetracyanoethylene were totally different. In the type I, a bulky group at C2 decreased the rate of the reaction, whereas, in the type II, bulky alkyls at C2 enhanced the reactivity. The results accommodate to a proposed scheme involving an electron transfer step.View full abstract -
Roberto Colombo1980 Volume 9 Issue 9 Pages 1119-1122
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCleavage of benzyl ester-type linkage to the Sparrow modified polystyrene support was attempted with the aid of catalytic transfer hydrogenation using 1,4-cyclohexadiene and palladium black, and satisfactory yields were obtained. This will provide an alternatively efficient and mild method for the final deblocking step during improved solid phase peptide synthesis.View full abstract -
Tamotsu Fujisawa, Toshio Sato, Tatsuo Kawara, Kouichi Naruse1980 Volume 9 Issue 9 Pages 1123-1124
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of β-propiolactone with di-(Z)-1-alkenylcuprates, prepared from Grignard reagents, copper(I) iodide and acetylene, gave (Z)-4-alkenoic acids in high yields in one-pot operation.View full abstract -
Akira Tai, Masaaki Nakahata, Tadao Harada, Yoshiharu Izumi, Shoichi Ku ...1980 Volume 9 Issue 9 Pages 1125-1126
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe enantioface-differentiating hydrogenation of methyl 3-oxotetradecanoate over (R,R)-tartaric acid-NaBr-modified nickel gave methyl (R)-3-hydroxytetradecanoate(III) in 85% e.e.. After HI was converted to dicyclohexylammonium salt of 3-hydroxytetradecanoic acid (I), the salt was recrystallized three times from acetonitrile and was then treated with acid to give optically pure (R)-I in a good yield.View full abstract -
Masashi Tashiro, Takehiko Yamato1980 Volume 9 Issue 9 Pages 1127-1130
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of 2,7-di-tert-butyl-trans-10b,10c-dialkyl-10b,10c-dihydropyrene 5a–5c with bromine afforded the corresponding tetrabromides 7a–7c in good yields, respectively. The tetrachloro derivative of 5a was also obtained in 40% yield by the treatment of 5a with SO2Cl2. The bromination of 5a–5c with bromine in the presence of Fe powder gave the dealkylated compound 2,7-di-tert-4,5,9,10-tetrabromopyrene 8 in good yields, respectively. When 5a–5c were treated with I2 2,7-di-tert-butylpyrene 9 was obtained in good yields, in all cases.View full abstract -
Juji Yoshimura, Namgi Hong, Ken-ichi Sato1980 Volume 9 Issue 9 Pages 1131-1132
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMethyl 6-deoxy-3-C-methyl-β-D-gulopyranoside (1: methyl β-D-virenoside) has been synthesized from galactose. The introduction of methyl branching at C-3 position was achieved by the Grignard reaction.View full abstract -
Yoshiro Yamashita, Takashi Hayashi, Mitsuo Masumura1980 Volume 9 Issue 9 Pages 1133-1136
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSReactions of benzyne with several pyridinium N-imines were examined. 2-o-Aminophenylpyridine derivatives 6, pyrido[1,2-b]indazoles (7), indazolo[2,3-a]quinoline (17), and indazolo[3,2-a]isoquinoline (18) were obtained by the reactions of benzyne with the corresponding ylides 5, 10, 15, and 16, respectively.View full abstract -
Keiichi Tsukahara, Hiroko Ushio, Yasuo Yamamoto1980 Volume 9 Issue 9 Pages 1137-1140
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSN,N′-Ethylenebis(salicylideneaminato)cobalt(II) catalyzed the autoxidation of ascorbic acid in methanol. The kinetic evidence of a transient-oxygen complex with ascorbic acid was obtained by the measurements of the oxygen consumption in this catalytic oxidation.View full abstract -
Keiji Ito, Saburo Nakanishi, Yoshio Otsuji1980 Volume 9 Issue 9 Pages 1141-1144
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of aromatic aldehydes with Fe(CO)5 or Fe3(Co)12 in pyridine gives the corresponding 1,2-diaryl-1,2-ethanediols as major products in good yields. A reactive species of this reaction is octacarbonyl diferrate [Fe2(CO)8]2−.View full abstract -
Hiroyoshi Kamogawa, Toshiaki Masui, Masato Nanasawa1980 Volume 9 Issue 9 Pages 1145-1148
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotochemically induced reversible reduction of viologens in solid polar aprotic polymer matrices proceeds much more efficiently than that in protic ones. The effects of the N-substituent and anionic part of viologens were also considerable.View full abstract -
Hisaharu Hayashi, Yoshio Sakaguchi, Saburo Nagakura1980 Volume 9 Issue 9 Pages 1149-1152
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe photodecomposition reaction of 1,3-diphenyl-2-propanone in a micelle was studied with the aid of ns laser-photolysis. The transient absorption due to the benzyl radical was observed and the amount of escaping benzyl radicals from radical pairs was found to be enhanced by 30 % in the presence of a magnetic field of 70 mT.View full abstract -
Hideki Masuda, Akira Fujishima, Kenichi Honda1980 Volume 9 Issue 9 Pages 1153-1156
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn application of photoacoustic spectroscopy (PAS) for semiconductor electrode reactions is described. A cathodic decomposition of a CdS single crystal electrode and an electrochemical deposition of Cd2+ on the CdS electrode were measured by PAS technique in situ.View full abstract -
Fumio Yoneda, Ryoichi Hirayama, Machiko Yamashita1980 Volume 9 Issue 9 Pages 1157-1160
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of 3-methyl-6-phenoxyuracils with the Vilsmeier reagent gave the corresponding 5-formyl-3-methyl-6-phenoxyuracils. Dehydrative cyclization of the above 5-formyluracils with polyphosphoric acid gave 3-methyl-2H-chromeno[2,3-d]pyrimidine-2,4(3H)-diones (3-methyl-5-deaza-10-oxaflavins). These 5-deaza-10-oxaflavins showed strong oxidizing power in oxidizing benzyl alcohol even under neutral conditions to give benzaldehyde, while they were hydrogenated to 1,5-dihydro-5-deaza-10-oxaflavins.View full abstract -
Alauddin Ahmed, Hirohiko Fukuda, Katsuhiko Inomata, Hiroshi Kotake1980 Volume 9 Issue 9 Pages 1161-1164
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS3-(5-Nitro-2-pyridon-1-yl)-1,2-benzoisothiazole 1,1-dioxide (BID-NPy) was found to be a useful condensing reagent. Various dipeptides and esters were prepared in good yields using this reagent.View full abstract -
Yasuhiro Iwasawa, Hideo Kubo, Masahiko Yamagishi, Sadao Ogasawara1980 Volume 9 Issue 9 Pages 1165-1168
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSNew fixed Mo2 catalysts with “paired” molybdenum species were prepared using Al2O3 and SiO2 find the active structure for C3H6 metathesis and the following order of activity for surface structures was found in comparison with the activities of fixed “single” Mo catalysts;View full abstract -
Yoshio Okahata, Hirotaka Ihara, Masatsugu Shimomura, Shin-ichiro Tawak ...1980 Volume 9 Issue 9 Pages 1169-1172
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSingle-chain phosphocholine amphiphiles which possess rigid segments in the hydrophobic portion formed disk-like aggregates, which are different from lecithin vesicles. When the rigid segment was azobenzene unit, trans-to-cis isomerization changed some membrane characteristics.View full abstract -
Shigenori Nakano, Hitomi Enoki, Takuji Kawashima1980 Volume 9 Issue 9 Pages 1173-1176
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new sensitive catalytic method for the determination of copper(II) is proposed. In the presence of hydrogen peroxide, copper(II) catalyzes the oxidation of p-hydrazinobenzenesulfonic acid to p-sulfobenzenediazonium ion, which is coupled with m-phenylenediamine to form a yellow azo dye (λmax=454 nm). By means of this catalytic reaction, nanogram amounts of copper(II) can be determined easily.View full abstract -
Minoru Suzuki, Etsuro Kurosawa1980 Volume 9 Issue 9 Pages 1177-1180
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTwo new halogenated non-terpenoid C15 compounds, venustin A (1) and B (2), were isolated from the red alga Laurencia venusta Yamada. The structures of these compounds were determined by chemical and spectroscopic evidence.View full abstract -
Yoshiyuki Hirashima, Yoshikazu Moriwaki, Jiro Shiokawa1980 Volume 9 Issue 9 Pages 1181-1184
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe yield of the solid complex of tetraethylene glycol(EO4) with a lanthanoid(Ln) nitrate decreases with increasing atomic number of Ln, and is greatly affected by H2O present in the solution. The separation factors of EO4 are comparable to those of the separating reagents practically used.View full abstract -
Yasuyoshi Torii, Sukezo Kawamura, Riichi Kurokawa1980 Volume 9 Issue 9 Pages 1185-1188
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe structure of the title compound has been determined from powder X-ray diffraction data and found to be much the same as in 8-layer Ba4(LiNb3)O12. Only the Cr3+ ions occupy the face-shared octahedra, while the Ta5+ ions occupy the corner-shared octahedra.View full abstract -
Fumio Wada, Yoshiko Wada, Tokio Goto, Kiyoshi Kikukawa, Tsutomu Matsud ...1980 Volume 9 Issue 9 Pages 1189-1192
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSNew bis(benzocrown ether)s linked by various length of poly(oxyethylene) chain, –OCH2(CH2OCH2)mCH2O–; m = 1 – 4, shows much increased extractability and selectivity to larger cations than the hole size of the crown ether ring in the extraction of alkali metal picrates. The spectra of the bis(benzo-18-crown-6) complexes in THF suggested the existence of more complex ionic species than those of bis(benzo-15-crown-5) series.View full abstract -
Shigeru Oae, Hideo Togo, Tatsuo Numata, Ken Fujimori1980 Volume 9 Issue 9 Pages 1193-1196
Published: September 05, 1980
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSulfinic acids were found to be readily reduced to the corresponding disulfide quantitatively at room temperature upon treatment with a mixture of thiols and chlorotrimethylsilane.View full abstract
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