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Volume 4, Issue 8
Displaying 1-33 of 33 articles from this issue
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Akira Takase, Sakumitsu Akagami, Minoru Nakamizo1975 Volume 4 Issue 8 Pages 797-802
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSRaman spectra of the smectic H phase and two unidentified phases of terephthal-bis-butylaniline are studied in the 0–400cm−1 region. Observation of the Raman peaks due to lattice vibrations suggests that the latter two phases are closer to the crystalline solid phase rather than the smectic H phase.View full abstract -
Katsuyuki Ogura, Ikuo Yoshimura, Nobuko Katoh, Gen-ichi Tsuchihashi1975 Volume 4 Issue 8 Pages 803-804
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMethyl ester of N-lauroylvaline, as well as its α-methylthio and α-methoxy derivatives, was synthesized, starting from 1-methylsulfinyl-1-methylthio-2-amino-3-methyl-1-butene (2, R1 = i-Pr) which was obtained by the reaction of isobutyronitrile and methyl methylthiomethyl sulfoxide (1).View full abstract -
Yoshio Ikefuji, Norihiko Yoshioka, Hisayuki Noumi, Susumu Tsuchiya1975 Volume 4 Issue 8 Pages 805-806
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe isomerization of 1-butene takes place over potassium; trans-2-butene and cis-2-butene are formed. The ratio, trans/cis, was 0.1–0.2 in the temperature range 20–40°C, and was about unity in the range 90–140°C.View full abstract -
Hideaki Imai, Takeshi Nishiguchi, Kazuo Fukuzumi1975 Volume 4 Issue 8 Pages 807-808
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the hydrogen transfer reaction catalyzed by dihydridotetrakis(triphenylphosphine)ruthenium(II), aldehydes and ketones are reduced to corresponding alcohols by ethers, hydroaromatic compounds, a tert-amine and alcohols under mild conditions.View full abstract -
Shigeaki Muto, Hajime Ogata, Yoshio Kamiya1975 Volume 4 Issue 8 Pages 809-812
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOxidative addition reactions of organic acids to dioxygen complexes are investigated. In the case of Pt(PPh3)2O2, hydrogen peroxide is obtained in as much as 70% yield with a platinum carboxylato complex, Pt( PPh3)2(OCOCH2Cl)2. The effect of pKa of the substrates on the oxidative addition of the dioxygen complexes is also examined.View full abstract -
Tadashi Endo, Hidetoshi Tasai, Tatsuzo Ishigami1975 Volume 4 Issue 8 Pages 813-814
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSUnsymmetrical disulfides were readily prepared in high yields by successive treatment of silver thiolates initially with 2,4-dinitrobenzenesulfenyl chloride in acetonitrile at 0 °C and then with the second thiols and silver acetate in DMF at room temperature.View full abstract -
Masahiko Iyoda, Masazumi Nakagawa1975 Volume 4 Issue 8 Pages 815-818
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDinaphtho-di-t-butyltetradehydro[18]annulene (X) was prepared in order to clarify the effect of annelation on the diatropicity of dehydroannulenes containing formal acetylene and cumulene in the cyclic system. It was found that the diatropicity of X is strongly suppressed by fusion with two naphthalene nuclei in contrast to strongly diatropic dinaphtho-di-t-butyldidehydro[l4]annulene (III). The result indicates that equivalent Kekule structures exert prominent effect on the delocalization of π-electrons in annelated annulene. The preparation of bis(dihydronaphtho)- (VIII) and naphtho-dihydronaphtho- (XII) analogues as reference compounds was also described.View full abstract -
Syun-ichi Ishikawa, Hirochika Sakuragi, Masayuki Yoshida, Naoki Inamot ...1975 Volume 4 Issue 8 Pages 819-822
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of benzophenone O-acyloximes (I) in benzene or toluene effects aromatic substitution on the solvents by diphenylmethaniminyl radicals (IV) to give N-diphenylmethyleneaniline (II) or N-diphenylmethylenetoluidines (VIII) unless concurrently formed acyloxyl radicals facilely decarboxylate. A mechanism involving a participation of sufficiently lived acyloxyl radicals is proposed for the above substitution reactions.View full abstract -
Yoshio Nakamura, Hidefumi Hirai1975 Volume 4 Issue 8 Pages 823-828
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA polymer–rhodium complex prepared from rhodium(III) chloride and styrene-divinylbenzene copolymer with iminodiacetic acid groups is found to catalyze the heterogeneous hydrogenation of alkenes in polar solvents at 30°C under an atmospheric hydrogen pressure. The polymer complex hydrogenates selectively the ethylenic double bonds in the alkenes with carbonyl and aromatic groups. The rates of hydrogenation of alkenes by the polymer complex are found to be markedly affected by the steric hindrance of the substrates.View full abstract -
Mamoru Ohashi, Kazuo Tsujimoto1975 Volume 4 Issue 8 Pages 829-830
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of 1,2,4,5-tetracyanobenzene in tetrahydrofuran underwent photosubstitution to give tetrahydro-2-(2,4,5-tricyanophenyl)furan. The reaction is scarecely affected by trifluoroacetic acid and hence it appears to belong to a novel class of photoelectrophilic substitution.View full abstract -
Ushio Sakaguchi, Hayami Yoneda1975 Volume 4 Issue 8 Pages 831-832
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe proton spin-lattice relaxation times have been measured on diamminebis(acetylacetone)ethylenediimino-cobalt(III) ion in D2O using the pulsed Fourier transform method at 100 MHz. The shorter relaxation time of the methyl resonating at lower magnetic field indicates that this methyl signal should be assigned to the methyl groups adjacent to the diimine bridge.View full abstract -
Akira Itaya, Ken-ichi Okamoto, Shigekazu Kusabayashi1975 Volume 4 Issue 8 Pages 833-836
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe triplet energy transfer in poly-N-vinylcarbazole (PVCz) films has been investigated by measuring the delayed emission spectra at 77 K. By doping of a triplet quencher such as naphthalene and fluorene, the PVCz phosphorescence decreased significantly and was replaced by the sensitized dopant phosphorescence. On the contrary, the PVCz delayed fluorescence rather increased with increasing concentration of triplet quenchers. This phenomenon suggests the presence of a heterogeneous triplet–triplet annihilation in PVCz films.View full abstract -
Teruo Umemoto, Toshihide Kawashima, Yoshiteru Sakata, Soichi Misumi1975 Volume 4 Issue 8 Pages 837-840
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS[2.2] (1,3)Pyrenophane (5) and a triple-layered metacyclopyrenophane (10) were synthesized successfully via transannular reaction of 4,6-bisbromomethyl[2.2]metacyclophane with bromine as a key step and finally by dehydrogenation with DDQ.View full abstract -
Kyoichi Sekine1975 Volume 4 Issue 8 Pages 841-846
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new electrochemical method for the study of the diffusion process of hydrogen in metal foils is proposed. In the bielectrode system when hydrogen charging direct current is overlapped with sinusoidal current, there appears a phase lag in permeation current. This phase lag is related mathematically to the diffusion coefficient D of hydrogen in metal. The values of D obtained by this method are in good agreement with those by other methods in α-phase palladium-hydrogen system.View full abstract -
Toschitake Iwamoto, Mamoru Kiyoki, Niro Matsuura1975 Volume 4 Issue 8 Pages 847-848
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe cyclohexadienyl radicals in the γ-irradiated benzene clathrates Cd(diam)M(CN)4·2C6H6 (diam = (NH3)2, NH2(CH2)2NH2, or NH2(CH2)3NH2; M = Cd or Hg) are stable up to 423 K.View full abstract -
Teizo Kitagawa, Tetsutaro Iizuka, Masao Saito, Yoshimasa Kyogoku1975 Volume 4 Issue 8 Pages 849-852
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSClassification of the Raman spectra of various hemoproteins including HbNO and HbCNC2H5 suggests that there are two kinds of ferrous low spin states. They are specified by the binding nature of the sixth ligand (L) to heme iron. The Fe–L bond in HbNO and HbCNC2H5 as well as in HbCO and HbO2 is of π type while that in ferrous cytochromes b5 and c is of σ type.View full abstract -
Takeo Taguchi, Hisashi Okamura, Hisashi Takei1975 Volume 4 Issue 8 Pages 853-854
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA convenient method for the preparations of 3-alkylfuran and 2,4-dialkylfuran has been established via three step-procedures starting from α-(alkylthio)carbonyl compounds.View full abstract -
Mikio Watanabe, Kozo Shirai, Takanobu Kumamoto1975 Volume 4 Issue 8 Pages 855-858
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of γ-butyrolactone with N-phenylthiophthalimide in the presence of lithium diisopropylamide afforded α,α-bis (phenylthio)-γ-butyrolactone 1 in high yield. Further, a convenient method for the preparation of 3-substituted 2-buten-4-olide was established by the use of 1.View full abstract -
Katsuo Ohkata, Yasuo Kubo, Akira Tamaru, Terukiyo Hanafusa1975 Volume 4 Issue 8 Pages 859-862
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS1,1,2,2-Tetraacylcyclopropanes (1a, 1b) were rearranged into nine-membered enol lactones (2a, 2b) by tertiary amines, while primary arylamines brought about retro-Mannich reaction to give bisdimedone (4) and Schiff base.View full abstract -
Akitami Ichihara, Hideo Kaibuchi, Makio Kobayashi, Kengo Oda, Sadao Sa ...1975 Volume 4 Issue 8 Pages 863-866
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSNovel cage-shaped compounds were obtained by the reduction of r-2,3-epoxy-2,3,4,c-4a,5,8,c-8a-hexahydro-c-5,8-isobutylidene-1,4-naphthoquinones (1) and assigned the structure 2 on the basis of the spectral data and X-ray crystallography. The compounds have an oxygen-containing strained cage structure hitherto unknown.View full abstract -
Takashi Kawamura, Masaji Matsunaga, Teijiro Yonezawa1975 Volume 4 Issue 8 Pages 867-870
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCorrelations between coupling constants in electron spin resonance and nuclear magnetic resonance are examined. Plots of proton hyper-fine splitting constants of HR· against the corresponding proton–proton coupling constants of the parent hydrocarbons HRH are shown to fit one curve.View full abstract -
Yutaka Watanabe, Manzo Shiono, Teruaki Mukaiyama1975 Volume 4 Issue 8 Pages 871-872
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS2-(Phenylthio)ethanols readily accessible from carbonyl compounds and phenylthiomethyllithium were converted into terminal olefins in high yields by way of the reductive β-elimination on treatment with TiCl4 and LiAlH4 in the presence of tertiary amine such as 1,8-bis(dimethylamino)naphthalene or tri-n-butylamine.View full abstract -
Hiroshi Takaku, Yoshifusa Shimada, Tsujiaki Hata1975 Volume 4 Issue 8 Pages 873-874
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS8-Hydroxyquinolyl group was used as a new protecting group on phosphates in the synthesis of oligonucleotides. This group was easily removed by treatment with cupric chloride in a mixture of dimethyl sulfoxide and water.View full abstract -
Masayoshi Muraki, Teruaki Mukaiyama1975 Volume 4 Issue 8 Pages 875-878
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBis(4-methyl-1-piperazinyl)aluminum hydride was found to be a useful reagent for reduction of various N,N-disubstituted carboxamides, such as N-acylmorpholines and N,N-dimethylcarboxamides, to provide the corresponding aldehydes in fairly good yields.View full abstract -
Khurshid A. Khan1975 Volume 4 Issue 8 Pages 879-882
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPrimary processes in photolysis of 1-nitropropane in gas phase are analogous to those of nitroethane and 2-nitropropane. Ethylene, propylene and methyl nitrite are the major photolysis products,while minor products are methane, methyl nitrate, ethylene oxide, ethyl nitrite, propyl nitrite, formaldehyde, propionaldehyde, water, nitric oxide and nitrogen dioxide. Quantum yields of formation of photoproducts ethylene and propylene at 22°C are 0.074 and 0.042; and at 56°C these are 0.039 and 0.01. A mechanism of the photolysis is suggested.View full abstract -
Yoshihiro Nakato, Toshihiro Ohnishi, Hiroshi Tsubomura1975 Volume 4 Issue 8 Pages 883-886
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSContrary to most ordinary semiconductor electrodes, metal-coated semiconductor electrodes have been found to cause photocurrents in aqueous solutions without dissolution into or reaction with the solution, and will be useful as solar-energy convertors.View full abstract -
Hideki Sakurai, Yoshiyasu Kamiyama, Yasuhiro Nakadaira1975 Volume 4 Issue 8 Pages 887-890
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOrganodisilanes undergo a novel 1:2 cycloaddition reaction with butadiene or isoprene in the presence of a palladium complex. For example, the reaction of 1,1,2,2-tetramethy1-1,2-disilacyclopentane with isoprene gave 1,1,5,5,8,11-hexamethyl-l,5-disilacyclotrideca-7,11-diene in 76% yield.View full abstract -
Hideki Sakurai, Takafumi Imai1975 Volume 4 Issue 8 Pages 891-894
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of a palladium complex, 1,1-dimethyl-1-silacyclobutane reacts smoothly with dimethyl acetylenedicarboxylate to give 1,1-dimethyl-2,3-bis(methoxycarbonyl)-1-silacyclohex-2-ene in quantitative yield. Other silacyclobutanes react similarly with various acetylenes to give silacyclohexene derivatives.View full abstract -
Tadashi Masamune, Hajime Matsue1975 Volume 4 Issue 8 Pages 895-898
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe synthesis of the titled hydrooxocinone (2) is described. Hydride reduction of a mixture of methyl 5-ethyl-2,5-dihydro-2-furoates (3) followed by ozonization afforded a dialdehyde mixture, which was submitted to the Robinson-Schöpf condensation to give, after acetylation, three 9-aza-3-oxabicyclo[3. 3 .1]nonanones (5 ∼ 7). cis-Bicyclononanone (5) was further transformed by a modification of the Paquette procedure (5 → 8 → 9 → 10a → 11) to give cis-2-ethyl-8-hydroxymethyl-7, 8-dihydro-2H oxocin-3 (4H)-one (11), which was converted smoothly into the aldehyde (2), one of the most important intermediates for synthesis of laurencin (1).View full abstract -
Akihiko Yamagishi1975 Volume 4 Issue 8 Pages 899-902
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe rates of the electron-transfer reaction between 7,7,8,8-tetracyanoquinodimethane anion radical and 2,3-dichloro-5,6-dicyano-p-benzoquinone in acetonitrile have been determined with a temperature-jump apparatus. The forward and backward rate constants are (4±1) ×109M−1s−1 and (1±0.5) ×104M−1s−1 at 15°C, respectively. Addition of 10 per cent water to acetonitrile decreases the forward rate constant by a factor of 100.View full abstract -
Kiyoshi Kawakami, Tsutomu Mizoroki, Atsumu Ozaki1975 Volume 4 Issue 8 Pages 903-904
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDimerization of ethylene is very selectively catalyzed by halogenotris(triphenylphosphine)cobalt(I) in the presence of Lewis acid in halobenzene. The catalytic activity is significantly affected by the solvent, bromobenzene being most effective.View full abstract -
Shin Sato, Kiyoshi Okazaki1975 Volume 4 Issue 8 Pages 905-908
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe apparatus for the measurement of the efficiency of the conversion of γ-rays into UV-light has been devised. The conversion system consists of helium gas with a drop of mercury. The G-value of UV-light-photons at 253.7 nm produced in this system by γ-irradiation was estimated both experimentally and theoretically. The mercury photosensitized decomposition of nitrous oxide at 0°C was used as the actinometer. The efficiency of the conversion of 60Co γ-rays into UV-light at 253.7 nm was found to be 80 %.View full abstract -
Yoshio Takasu, Shun-ichi Maru, Yoshiharu Matsuda1975 Volume 4 Issue 8 Pages 909-910
Published: August 05, 1975
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOxidation of iron plates in nitric oxide was examined. The oxidation rate was higher than that in oxygen in a certain temperature range, 450–580°C, however, it had a minimum at 550°C in regard to its temperature dependencies. The scales formed in nitric oxide was found to be consisted of only Fe3O4.View full abstract
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