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Volume 8, Issue 10
Displaying 1-35 of 35 articles from this issue
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Isao Ikemoto, Minoru Sakairi, Takayoshi Tsutsumi, Haruo Kuroda, Issei ...1979 Volume 8 Issue 10 Pages 1189-1192
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe X-ray photoelectron spectra of iodine-doped polyacetylene (CHIx)n films are studied. By comparing with the results of Raman spectroscopy, it is concluded that iodine is more concentrated in the surface region than in the bulk when the amount of the doped iodine is small (i.e., x<0.05). It is probable that in a heavily iodine-doped film, iodine is distributed more homogeneously throughout the film, and that a considerable amount of iodine in the surface region can be easily liberated when the film is kept in vacuum. The mole ratio of I5−/I3− is higher in the surface region than in the bulk.View full abstract -
Kiyoshi Isobe, Kazuharu Nanjo, Yukio Nakamura, Shinichi Kawaguchi1979 Volume 8 Issue 10 Pages 1193-1196
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDinuclear complexes [PdX(R)(PPh3)]2 (R = 2-(6-chloropyridyl)) containing ClO4−, BF4−, and PF6− as bridging ligands (X) have been prepared and characterized. Reactions with pyridine convert these anions into the unidentate ligands, giving rise to the [PdX(R)(py)(PPh3)] complexes which are more stable than the corresponding salts [Pd(R)(py)2(PPh3)]X.View full abstract -
Toshihiko Uchiyama, Kazuhiko Takagi, Keiji Matsumoto, Shun’ichir ...1979 Volume 8 Issue 10 Pages 1197-1200
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESStrans-Dichlorobis(benzonitrile)platinum(II) reacted with thallium(I) acetylacetonate in dichloromethane at room temperature to give three kinds of yellow products. One of them was obtained as fine crystals and revealed by an X-ray analysis to be N-acetyl-β-ketoamine chelate, trans-[Pt(N(COCH3)=C(C6H5)CH=COCH3)2].View full abstract -
Hemalatha Ranganathan, D. Ramaswamy, T. Ramasami, M. Santappa1979 Volume 8 Issue 10 Pages 1201-1202
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSData showing the direct influence of substituents in the pyridine ring on the electron density at the azomethine function in 2- aminopyridine derivatives and their contrasting behaviour as compared to the aniline analogoues are presented. Results point out tautomeric equilibration and extended conjugation in title compounds.View full abstract -
Tadashi Sato, Katsuyuki Nagumo, Kimitoshi Saito, Toshiyuki Ohyama, Ryo ...1979 Volume 8 Issue 10 Pages 1203-1206
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCyclic β-dicarbonyl compounds 1a, 1b, 10a and 10b undergo isomerization involving reconstruction of the ring system by the UV-irradiation in strong acid media. It is suggested that the isomerization is aided by the formation of stabilized cation after the ring opening.View full abstract -
Teruaki Mukaiyama, Katsumi Fujimoto, Takeshi Takeda1979 Volume 8 Issue 10 Pages 1207-1210
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDihydrofuran and cyclopropane derivatives are produced by the reaction of (E)-(2R,3S)-6-alkylidene-3,4-dimethyl-2-phenylperhydro-l,4-oxazepine-5,7-diones with dimethylsulfoxonium methylide. The cyclopropane derivatives are hydrolyzed and esterified to give highly optically pure (>90%e.e.) dimethyl 2-alkylcyclopropane-1,1-dicarboxylates. Highly optically pure (>90%e.e.) 3-substituted γ-butyrolactones are obtained by the hydrolysis of the dihydrofuran derivatives.View full abstract -
Kazuhiro Maruyama, Noritsugu Narita1979 Volume 8 Issue 10 Pages 1211-1212
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA photosensitized reaction of 2-acyl-1,4-benzoquinone 1 by rose bengal in a homogeneous system afforded the dimer 2 in a good yield. Even in the reactions in heterogeneous systems using rose bengal bound on the surface of silica gel particles, the same dimer was obtained in the comparable yields with those in a homogeneous system, but at a slower rate.View full abstract -
REACTION OF AMIDOXIMES WITH DIPHENYLCYCLOPROPENONE. SYNTHESIS OF 2-ARYL-5,6-DIPHENYLPYRIMIDIN-4-ONESMasahiko Takahashi, Shin-ichi Watanabe1979 Volume 8 Issue 10 Pages 1213-1214
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of arylamidoximes with diphenylcyclopropenone in refluxing toluene gave 2-aryl-5,6-diphenylpyrimidin-4-ones in good yields.View full abstract -
Yasuyoshi Torii1979 Volume 8 Issue 10 Pages 1215-1218
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new perovskite La2⁄3(Mg1⁄2W1⁄2)O3 having an orthorhombic multiple-cell was synthesized. The lattice constants were a=7.8157(5) Å, b=7.8344(6) Å and c=2×7.9067(6) Å. The superstructure was found to be due to a NaCl-type ordering of B ions as well as an ordering of A-site vacancies.View full abstract -
Seiichi Inayama, Ashok Kumar Singh, Takeshi Kawamata, Tadaaki Hirose, ...1979 Volume 8 Issue 10 Pages 1219-1222
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS(+)-1β,3α,6αH-4α,7β,11-trimethyltricyclo[5.4.13,6.01,7]dodec-10-en-5-one (3) was obtained together with trimethylethanoadamantanone (2) by an unusual reaction of 3-deoxyhexahydrosantonin (1). The structure, conformation and absolute configuration of 3 was determined by X-ray diffraction and CD/ORD spectrometry.View full abstract -
Takehiko Nishio, Yoshimori Omote1979 Volume 8 Issue 10 Pages 1223-1224
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSReduction of β-sulfenylated α,β-unsaturated ketones (1) with sodium borohydride (NaBH4) in the presence of a catalytic amount of metal halide (CoCl2 or NiCl2) gave the saturated ketones (3). However, FeCl2, FeCl3, CuI, and CuCl2 showed no effect in the reduction of 1.View full abstract -
Hiroshi Takaku, Tadaaki Nomoto, Yukimi Sakamoto, Tsujiaki Hata1979 Volume 8 Issue 10 Pages 1225-1228
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS5′-O-Dimethoxytrityl 2′-O-tetrahydropyranyl nucleoside 3′-(2-cyanoethyl, 5-chloro-8-quinolyl) phosphates (3) were obtained in good yields by treating 5′-O-dimethoxytrityl 2′-O-tetrahydropyranyl nucleosides (1) with 5-chloro-8-quinolyl phosphate and 8-quinolinesulfonyl chloride (QS) followed by addition of 2-cyanoethanol. The compound 3 is a key intermediate for the oligoribonucleotide synthesis by the improved triester method.View full abstract -
Osamu Maruyama, Michiaki Yoshidomi, Yuzo Fujiwara, Hiroshi Taniguchi1979 Volume 8 Issue 10 Pages 1229-1230
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe Pd-catalyzed one-step alkenylation method of five-membered aromatic heterocycles such as furan or thiophene with olefins has been found. The reaction proceeds regioselectively occurring at the 2-position of the heterocycles and the products have trans-stereochemistry when the substituents on the olefin is bulky.View full abstract -
Hideshi Nakamura, Toshio Goto1979 Volume 8 Issue 10 Pages 1231-1234
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe title dioxetanes give in polar solvents visible chemiluminescence which is proven to be produced from the intramolecular exciplex between two aromatic substituents on the product diesters by comparison of chemiluminescence of the dioxetanes (2a–2d) and fluorescence of the corresponding diesters (3a–3d). That decomposition of the dioxetanes gives the corresponding diesters (in a singlet excited state) in a preferential conformation for the formation of intramolecular exciplex is also concluded from the above analysis as well as the examination of conformational effects on the exciplex fluorescence of the diesters, 4 and 5.View full abstract -
Yukio Masaki, Kazuhiko Sakuma, Kenji Kaji1979 Volume 8 Issue 10 Pages 1235-1238
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new stereospecific synthesis of vinyl sulfides (4) was achieved via complete cis–trans olefin inversion in which benzenesulfenyl chloride addition to olefins (1) and trans elimination of hydrogen chloride are involved.View full abstract -
Isao Kuwajima, Kunio Atsumi, Toshihiko Tanaka, Tan Inoue1979 Volume 8 Issue 10 Pages 1239-1240
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS5-Trimethylsiloxy-3,4-pentadienone enolates can be generated efficiently by treating furyllithium with acyltrimethylsilanes and can be isolated in good yield as their silyl enol ethers.View full abstract -
Kunio Suzuki, Minoru Sekiya1979 Volume 8 Issue 10 Pages 1241-1244
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt has been found that the Mannich bases, of which methylene is linked to amine nitrogen and alkyl- or phenylmercapto-sulfur affect smoothly, in the presence of acid catalyst, alkyl- or phenylthiomethylation of a number of aromatic compounds, i.e. 2-naphthol, aniline, indole and their derivatives.View full abstract -
Mitsuru Nakayama, Susumu Ohira, Shuzo Shinke, Yoichi Matsushita, Akihi ...1979 Volume 8 Issue 10 Pages 1245-1246
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS(−)-Taylorione, ent-1,10-seco-aromadendra-l(5),4(15)-dien-10-one, was synthesized from (+)-Δ3-carene via (−)-2-[3-(3-hydroxybutyl)-2,2-dimethylcyclopropyl]-2-cyclopenten-l-one as a key intermediate.View full abstract -
Takashi Ohno, Shinya Mizusawa, Nobuharu Takai1979 Volume 8 Issue 10 Pages 1247-1250
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMetol, hydroquinone and their oxidation products in a photographic developer were satisfactorily analyzed directly by liquid chromatography without any pre-treatment of the developer. The eluent of the liquid chromatography was prepared by eliminating the developing agents from the developer.View full abstract -
Gaku Yamamoto, Michinori Oki1979 Volume 8 Issue 10 Pages 1251-1254
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS9-(3,5-Dimethylbenzyl)triptycene derivatives exchange their two m-methyl groups by two mechanisms: rotation about the CH2–Ar bond and synchronous rotation about the CH2–Ar and the CH2–C9 bonds. The relative contribution of the processes is dependent on the peri-substituents.View full abstract -
Gaku Yamamoto, Michinori Oki1979 Volume 8 Issue 10 Pages 1255-1258
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe conformational interconversion among ±sc and ap forms of 9-(2-methylbenzyl)triptycenes is found to occur by two consecutive gear motions: methyl-inside conformers formed by the synchronous rotation about the CH2–Ar and CH2–C9 bonds of the methyl-outside conformers are so unstable that another synchronous rotation takes place in succession to afford methyl-outside conformers. The change in 1H-nmr line shapes and the barriers to rotation are discussed.View full abstract -
Makoto Hino, Kazushi Arata1979 Volume 8 Issue 10 Pages 1259-1260
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSolid acid catalysts were obtained by exposing Fe(OH)3 or Fe2O3 to 0.1–0.5 N H2SO4 and then calcining in air at 500°C. Fe(OH)3 used was prepared by hydrolyzing FeCl3 or Fe(NO3)3 with ammonia, and Fe2O3 by decomposing Fe(NO3)3 at 200°C. These catalysts were active for the skeletal isomerization of butane at room temperature or 0°C.View full abstract -
Haruo Matsuda, Akira Ninagawa, Ryoki Nomura1979 Volume 8 Issue 10 Pages 1261-1262
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of carbon dioxide(CO2) with epoxides in the presence of pentavalent organoantimony compounds gave corresponding cyclic carbonates as a product in almost quantitative yields even under mild conditions.View full abstract -
Juji Yoshimura, Namgi Hong, Ken-ichi Sato1979 Volume 8 Issue 10 Pages 1263-1264
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSD-Evalose (1: 6-deoxy-3-C-methyl-D-mannose) was synthesized from methyl 3, 3′-anhydro-4, 6-O-benzylidene-3-C-hydroxymethyl-2-O-methyl-α-D-mannopyranoside (3) through five-step derivations, and the structure was confirmed by the conversion into D-nogaloside (8: methyl 6-deoxy-3-C-methyl-2,3,4-tri-O-methyl-α-D-mannopyranoside).View full abstract -
Katsuhiko Inomata, Hideki Kinoshita, Hirohiko Fukuda, Osamu Miyano, Yo ...1979 Volume 8 Issue 10 Pages 1265-1268
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS3-(Succinimidoxy)-l,2-benzoisothiazole-l,1-dioxide was found to be a useful reagent to convert the carboxylic acids to the corresponding N-hydroxysuccinimide esters. Various dipeptides and leucine-enkephalin were prepared using the reagent in good yields.View full abstract -
Midori Ishitsuka, Takenori Kusumi, Yukihiro Nomura, Toshinori Konno, H ...1979 Volume 8 Issue 10 Pages 1269-1272
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFrom the brown alga, Sargassum tortile, seven new benzoquinones and hydroquinones bearing diterpenoid side chains were isolated. 2-Geranylgeranyl-6-methylbenzoquinone, which is likely to be a basic substance of the diterpenoid-substituted benzoquinones distributed in many Sargassum species, was also obtained.View full abstract -
Yoshihiko Ito, Kazuhiro Kobayashi, Norihiko Seko, Takeo Saegusa1979 Volume 8 Issue 10 Pages 1273-1276
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIndolyllithium arising from ring-closure of o-lithiomethylphenyl isocyanide, which is generated in situ by the reaction of o-tolyl isocyanide with lithium diisopropylamide in diglyme at −78°C, is treated with anhydrous MgI2 prior to alkylations with alkyl halides to give 3-alkylindoles selectively in moderate to excellent yields. The reaction provides a convenient method for synthesis of 3-alkylindoles starting with o-tolyl isocyanide.View full abstract -
Kenji Suzuki, Junji Inanaga, Masaru Yamaguchi1979 Volume 8 Issue 10 Pages 1277-1278
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMethylthiomethyl (MTM) ethers of various types of alcohols were prepared under mild conditions by using chloromethyl methyl sulfide and silver nitrate.View full abstract -
Masahiko Yamaguchi, Teruaki Mukaiyama1979 Volume 8 Issue 10 Pages 1279-1282
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of 2-allyloxybenzimidazoles with butyllithium followed by cadmium iodide generates the metalated allylic ethers, which in turn react with aldehydes to form adducts selectively at α-carbon of the allylic ethers. The adducts are converted to vinyloxiranes in good yields on treatment with sodium hydride.View full abstract -
Tadaaki Ohgi, Tadao Kondo, Toshio Goto1979 Volume 8 Issue 10 Pages 1283-1286
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS7-Aminomethyl-7-deazaguanine, which is one of the precursors of nucleoside Q (queuosine) biosynthesis, was synthesized from 2-methylthio-6-methoxy-7-methyl-7-deazapurine in 13 steps.View full abstract -
Hideyuki Matsumoto, Takayuki Kato, Ikuya Matsubara, Yoshikazu Hoshino, ...1979 Volume 8 Issue 10 Pages 1287-1290
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS(α-Bromovinyl)chlorosilanes of the type CH2=CBrSiRnCl3−n(R = Me, Et; n = 0, 1, 2) were found to be dehydrobrominated with quinoline yielding the corresponding ethynylchlorosilanes.View full abstract -
Nobuto Hoshi, Hisahiro Hagiwara, Hisashi Uda1979 Volume 8 Issue 10 Pages 1291-1294
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe sensitized photolysis of 3-phenylated 2(3H)-oxepinones in methylene chloride containing acids gives 5-styryl-2(5H)-furanones as the major products. The 1,5-phenyl migrated products, 7-pheny1-2(7H)-oxepinones, are proposed as the most plausible initial photoproducts.View full abstract -
Nobuto Hoshi, Hisahiro Hagiwara, Hisashi Uda1979 Volume 8 Issue 10 Pages 1295-1298
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS7-Phenyl-2(7H)-oxepinones are shown to be the initial photoproducts of 3-phenyl-2(3H)-oxepinones by the synthesis and reaction, and finally by the success of the actual isolation of the 3-methyl derivative from photolysis.View full abstract -
Masakatsu Shibasaki, Katsuhiko Iseki, Shiro Ikegami1979 Volume 8 Issue 10 Pages 1299-1300
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA stereo and regiospecific route to the synthetic intermediate, bicyclo[3.3.0]octan-2-one derivative, for the total synthesis of 9(0)-methanoprostacyclin is described starting from 1,3-cyclooctadiene, in which as a key reaction, the conjugate addition of the Gilman reagent to the bicyclo[3.3.0]oct-8-en-2-one skeleton is involved.View full abstract -
Kozo Shibata, Nobutaka Ichikawa, Takashi Kubota1979 Volume 8 Issue 10 Pages 1301-1304
Published: October 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotooxygenation of 6-phenyl-5,7-dioxa-benz[a]anthracene in ethanol followed by recrystallization from ethanol resulted in the formation of a diethoxy compound by unusual addition of two ethoxyl groups to a C–C double bond. While, recrystallization of the photooxygenation product from methanol afforded a monoethoxy monomethoxy compound.View full abstract
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