All issues
Volume 8, Issue 6
Displaying 1-34 of 34 articles from this issue
- |<
- <
- 1
- >
- >|
-
Yuji Tsujimoto, Mitsunori Hayashi, Takuji Miyamoto, Yoshinobu Odaira, ...1979 Volume 8 Issue 6 Pages 613-616
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of an acetonitrile solution of a mixture of 9-cyanophenanthrene and tetramethylurea gave an ureidomethylated product in a high yield, the reaction being regioselective and solvent-dependent. It is indicated that the reaction involves the charge-transfer process in the excited triplet state of 9-cyanophenanthrene.View full abstract -
Yasuhiro Tsutsui, Keisuke Takuma, Toyoki Nishijima, Taku Matsuo1979 Volume 8 Issue 6 Pages 617-620
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOn the flash photolysis of an amphipathic derivative of tris(2,2′-bipyridine)ruthenium(II), the highest yield for photoreduction of the complex by N,N′-dimethylaniline was obtained with the micellar solutions of a cationic surfactant (CTAC). The kinetic studies proved that catalytic reduction of various substrates smoothly proceeded via the reduced ruthenium complex at the micellar surface.View full abstract -
Soei Sato, Seiichiro Higuchi, Shigeyuki Tanaka1979 Volume 8 Issue 6 Pages 621-622
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe Raman spectra of 11 kinds of O-alkyl xanthogenates in solutions and solid states were measured. The band patterns in the 700–600 cm−1 were examined in terms of the difference of phases, the behaviours on the change of solvents, and the intensities. From the results, origin of the characteristic band patterns was discussed.View full abstract -
Fumie Sato, Hiroyuki Kodama, Yasuji Tomuro, Masao Sato1979 Volume 8 Issue 6 Pages 623-626
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSHydroalumination of 1-olefins with lithium aluminum hydride followed by treatment with acid chlorides or anhydrides in the presence of a catalytic amount of copper(I) chloride resulted in coupling. This new development provides a simple and general method for the synthesis of ketones.View full abstract -
Masaru Matsuoka, Toshio Takei, Teijiro Kitao1979 Volume 8 Issue 6 Pages 627-630
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSelective butylamination promoted by copper salts was observed on the reaction of 5,8-dihydroxy-1,4-naphthoquinone(DHNQ) with butylamine. A novel β-butylamination of DHNQ proceeded in the presence of copper salts. A number of β-butylaminated naphthoquinone derivatives were conveniently obtained.View full abstract -
Chebock Yun, Masakazu Anpo, Yutaka Kubokawa1979 Volume 8 Issue 6 Pages 631-634
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotoenhancement of the propene formation from the isopropoxide on porous Vycor glass is attributed to O− hole centers formed by the charge transfer process at low co-ordination sites, which gives rise to the absorption around 250 nm as well as the emission at 400 nm.View full abstract -
Akio Ohsuka, Akira Matsukawa1979 Volume 8 Issue 6 Pages 635-636
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMethyl (±)-9-epidrimenate was oxidized with selenium dioxide at C-12 to give an aldehyde ester. The aldehyde group was protected by formation of an acetal, and then the methoxycarbonyl group was transformed into a formyl group. Hydrolysis of the acetal group gave (±)-isotadeonal. Stereoselective oxidation of the enolate generated from (±)-isotadeonal monoacetal gave (±)-warburganal monoacetal, which was hydrolyzed to (±)-warburganal.View full abstract -
Masayuki Ako, Shunsuke Takenaka1979 Volume 8 Issue 6 Pages 637-640
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAs a model of chiral benzophenone, R-(+)-2-(α-phenylethyl)benzophenone was prepared. The NMR and optical data indicate that rotations of the benzoyl and α-phenylethyl moieties are unrestricted in the range of −100 to 150°C, and therefore benzophenone skeleton is not chiral. A preferable conformation is discussed.View full abstract -
Iwao Ojima, Tetsuo Kogure1979 Volume 8 Issue 6 Pages 641-644
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS31P {1H} NMR studies on the key intermediate complex of asymmetric hydrogenation, [(L*–L)Rh(S–S′)]+ClO4− (L*–L = pyrrolidinodiphosphine, BPPM and PPPM; S–S′ = itaconic acid and α-acetamidoacrylic acid), revealed that the mode of the bidentated complexation of the prochiral substrate is extremely regioselective and stereoselective. A possible mechanism for chiral recognition of enantiofaces is proposed.View full abstract -
Tisato Kajiyama, Atsushi Kumano, Motowo Takayanagi, Yoshio Okahata, To ...1979 Volume 8 Issue 6 Pages 645-648
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSArtificial ammonium amphiphiles with monoalkyl and dialkyl groups form the multilamellar liposome composed of the bimolecular layer. Artificial amphiphiles have characteristics of both thermotropic and lyotropic mesomorphisms. The diffusive permeability of the polymer/artificial amphiphiles composite membrane to water exhibits a distinct jump in the vicinity of the crystal-mesomorphic phase transition temperature.View full abstract -
Hitoshi Takeshita, Hisakatsu Iwabuchi, Isao Kouno, Mitsuaki Iino, Danj ...1979 Volume 8 Issue 6 Pages 649-652
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStarting from 4,4-dimethylcyclopentene, the protoilludane skeleton was prepared by two steps of photocycloadditions and methylation with a Grignard reagent. A series of transformations on these products led to protoillud-7-ene and some derivatives.View full abstract -
Yash Karan Singh, R. Balaji Rao1979 Volume 8 Issue 6 Pages 653-656
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSWhen 1-piperidino-1-cyclopentene was condensed with cyclohex-2-en-1-one in DMSO, 6-piperidinotricyclo [5.2.2.02,6]-undecan-8-one was obtained. However, with 1-piperidino-1-cyclohexene only Michael product was obtained. A tentative mechanism is proposed.View full abstract -
Teruaki Mukaiyama, Masahiko Yamaguchi1979 Volume 8 Issue 6 Pages 657-660
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe treatment of 2-allyloxybenzimidazoles, derived from allyl alcohols and 2-chlorobenzimidazoles, with butyllithium generates the oxy allylic anions, which in turn were alkylated predominantly at α-carbon with alkyl halides to form allyl ethers as major products.View full abstract -
Hisao Nishiyama, Kiyotaka Ohno1979 Volume 8 Issue 6 Pages 661-664
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotosensitized oxygenation of prostaglandin F2α methyl ester was studied to prepare 6,7-didehydro-5-hydroxy and 4,5-didehydro-6-hydroxyprostaglandin F1α methyl ester. 6,7-Didehydro-5β-hydroxyprostaglandin F1α is interesting from the viewpoints of structure-activity relationships, because the two side chains of it have the symmetrical allylic alcohol structure.View full abstract -
Akio Furusaki, Shinsei Gasa, Nobuyuki Hamanaka, Ryuzo Ikeda, Takeshi M ...1979 Volume 8 Issue 6 Pages 665-666
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe structure of a new diterpene, grayathol A, has been shown to have a stereoisomeric grayanane skeleton by X-ray analysis.View full abstract -
Noritetsu Yoshida, Kenya Kazehara, Yoji Kawamoto, Shozo Kishimoto1979 Volume 8 Issue 6 Pages 667-670
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe difference in the catalytic activity between vitreous and crystalline state of a vanadate (V2O5–BaO–ZnO) was observed for the decomposition of formic acid. The results suggested that the surface net work structure formed by V2O5 is extremely inactive in the dehydration in comparison with the surface in the crystallized state.View full abstract -
Noboru Takisawa, Muneo Sasaki, Fujitsugu Amita, Jiro Osugi1979 Volume 8 Issue 6 Pages 671-674
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe high pressure stopped-flow apparatus has been developed which enables to follow reaction rates three seconds after mixing up to 1500 bar. The activation volume at 25°C for the Meisenheimer complex formation between 2,4,6-trinitroanisole and methoxide ion in methanol was determined to be −7.2±0.8 cm3mol−1.View full abstract -
Keisuke Makino, Nobuhiro Suzuki, Fumio Moriya, Souji Rokushika, Hiroyu ...1979 Volume 8 Issue 6 Pages 675-678
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSpin-adducts produced in a γ-irradiated aqueous solution of 2-methyl-2-nitrosopropane were investigated by means of high performance liquid chromatography and ESR spectroscopy. The existence of five kinds of spin-adducts was found. Three of them were assigned to the structures: tBuN(O·)–CH3, tBuN(O·)–CH2C(CH3)2NO or tBuN(O·)–CH2C(CH3)2–N+(O−)=N+(O−)tBu and tBuN(O·)–tBu.View full abstract -
Tisato Kajiyama, Yasuhisa Nagata, Eiji Maemura, Motowo Takayanagi1979 Volume 8 Issue 6 Pages 679-682
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe diffusive permeability coefficient to water for the polymer/EBBA composite membrane reveals a distinct jump in the vicinity of the crystal-liquid crystal phase transition temperature of EBBA. The permeability coefficients to hydrocarbon gases increase 100∼200 times over several degrees in the phase transition temperature range.View full abstract -
Naoyuki Torihara, Hisashi Okawa, Sigeo Kida1979 Volume 8 Issue 6 Pages 683-686
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCoMn(fsaen)(py)3, CoMn(fsapn)(py)3 and CoFe(fsapn)(py)3 (H fsaen=N,N′-bis(3-carboxysalicylidene)ethylenediamine, H4fsapn=N,N′-bis(3-carboxysalicylidene)propylenediamine) were synthesized and characterized. Cryomagnetic measurements indicated no spin-exchange interaction operating between the low-spin cobalt(II) and high-spin manganese(II) or iron(II) ions.View full abstract -
Juji Yoshimura, Namgi Hong, Masuo Funabashi1979 Volume 8 Issue 6 Pages 687-688
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSL-Nogalose (1: 6-deoxy-3-c-methyl-2,3,4-tri-o-methyl-L-mannopyranose), the sugar component of antibiotic nogalamycin, has been synthesized from L-rhamnose. The c-methyl branching was introduced by successive epoxidation and reduction of methyl 3,6-dideoxy-2,4-di-o-methyl-3-c-methylene-α-L-arabino-hexopyranoside.View full abstract -
Masayuki Muto, Satoru Yokota, Yusuke Yamamoto, Masayoshi Nakahara, Was ...1979 Volume 8 Issue 6 Pages 689-692
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new complex, Co(koj)2·H2O (Hkoj: kojic acid), was synthesized, and its IR spectrum indicated that kojates in it are coordinated to cobalt as bidentate ligands. When the complex was excited with ultraviolet light, it exhibited luminescence spectra having maxima at about 20000 cm−1 in aqueous and acidic solutions, and even in the solid state.View full abstract -
Kunio Furusawa, Hiroshi Kawai1979 Volume 8 Issue 6 Pages 693-696
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSConductometric titration curves using some bases give important knowledge about the structure of the electric double layer on the surface of polystyrene lattices. This analysis showed that the Stern layer charge increases with an increase in the surface charge of latex(δO) and at about the same rate as δO does, reaching a virtually constant diffuse-layer charge.View full abstract -
Teruaki Mukaiyama, Takashi Tsuji, Nobuharu Iwasawa1979 Volume 8 Issue 6 Pages 697-700
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn efficient method for acceleration of the intramolecular Diels–Alder reactions was established. The magnesium salts of N-furfuryl-N-(2-hydroxyphenyl)acrylamides, including a sterically hindered β,β-dimethylacrylamide derivative, afforded the corresponding cycloadducts in good yields.View full abstract -
Kazuko Takahashi, Takashi Kagawa, Kahei Takase1979 Volume 8 Issue 6 Pages 701-704
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS9-Methoxycarbonylbicyclo[4.3.1]decatetraenyl anion (6) has been prepared and its reaction with electrophiles has been studied. Contrary to the Radlick and Rosen’s explanation on bicyclo[4.3.1] decatetraenyl anion (2), 6 show a high exo (cis to the methylene bridge)-selection on quenching with acids and on the reaction with alkyl halides.View full abstract -
Teruaki Mukaiyama, Yoji Sakito, Masatoshi Asami1979 Volume 8 Issue 6 Pages 705-708
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA convenient method was established for the asymmetric synthesis of various α-hydroxy aldehydes with high optical yields starting from methoxycarbonyl aminal, prepared from methyl hydroxymethoxyacetate and (S)-2-(anilinomethyl)pyrrolidine. The configurations of α-hydroxy aldehydes are arbitrarily controlled by the order of the introduction of two substituents in the α-hydroxy aldehydes originated from Grignard reagents.View full abstract -
Katsuhiko Inomata, Manabu Sumita, Hiroshi Kotake1979 Volume 8 Issue 6 Pages 709-712
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt was found that 3-(phenylthio)propanal ethylene acetal (IV) is a useful starting material for the preparation of 3-acylfurans. Some 3-acylfurans, including perilla ketone [3-(4-methylpentanoyl)furan], were prepared by the use of IV from an aziridide or aldehydes.View full abstract -
Keiji Yamamoto, Mitsuaki Ohta, Jiro Tsuji1979 Volume 8 Issue 6 Pages 713-716
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSReaction of 1-trimethylsilyl-1,3-dienes with dichloromethyl methyl ether in the presence of titanium(IV) chloride afforded, after hydrolysis, 2,4-dienals in good yields. Convenient preparative route to the 1-trimethylsilyl-1,3-dienes starting from allylsilanes was also described.View full abstract -
Noriaki Funasaki, Sakae Hada1979 Volume 8 Issue 6 Pages 717-718
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe mutual solubility in mixed micelles of fluorocarbon and hydrocarbon surfactants was determined by surface tension measurements, as convincing evidence for the partial miscibility postulated by Mukerjee and Yang.View full abstract -
Minoru Imoto, Takamasa Maeda, Noriyuki Murayama, Tatsuro Ouchi1979 Volume 8 Issue 6 Pages 719-722
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe polymerization of methyl methacrylate(MMA) initiated by poly(formylstyrene) (PFS) was carried out in p-dioxane at 85°C. The rate of polymerization was expressed by the following equation: Rp = const. [PFS]0.43[MMA]1.31. The polymerization proceeded homogeneously through a radical mechanism. The initiating ability of PFS was found to be larger than that of benzaldehyde indicating a macromolecular effect on the polymerization.View full abstract -
Masaaki Yoshifuji, Fumito Hanafusa, Naoki Inamoto1979 Volume 8 Issue 6 Pages 723-726
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSVarious kinds of diphenylphosphinodithioates were prepared and allowed to react with some organolithium compounds under mild reaction conditions to give functionalized unsymmetrical sulfides and disulfides in good yields.View full abstract -
Yasuhiro Uosaki, Masaru Nakahara, Muneo Sasaki, Jiro Osugi1979 Volume 8 Issue 6 Pages 727-730
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe charge–transfer spectrum of tetracyanoethylene with α-methylstyrene in 1,2-dichloroethane at 25°C has been measured at high pressures up to 1500 bar. Volume changes associated with the charge–transfer complex formation and the 1,4-cycloaddition at 1 bar are −6.9±0.6 and −29.2±0.7 cm3 mol−1, respectively.View full abstract -
Kazuhiko Mizuno, Jun Ogawa, Masafumi Kamura, Yoshio Otsuji1979 Volume 8 Issue 6 Pages 731-732
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of an acetonitrile solution of phenyl vinyl ether in the presence of various metal complexes[Fe(III) and Mn(II) complexes] gave two cyclodimers. Similar irradiation of 1,1-dimethylindene and 1,1-diphenylethylene afforded the corresponding cyclodimers. In these photodimerization, the metal complexes with ligands such as 2,2′-bipyridine and 1,10-phenanthroline served as catalysts for electron-transfer reaction.View full abstract -
Suketaka Ito, Akikazu Kakehi, Toshiyuki Matsuno, Tadashi Sasaki1979 Volume 8 Issue 6 Pages 733-734
Published: June 05, 1979
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSN-(Phenylsulfonyl)benzohydrazonoyl chloride reacts with electron-rich olefins such as bicyclo[2.2.1]hept-2-ene to give 1-phenylsulfonyl-Δ2-pyrazoline derivatives in the presence of zinc oxide. Zinc oxide may cause the dehydrochlorination of the hydrazonoyl chloride to lead to the formation of N-(phenylsulfonyl)benzonitrilimine, which undergoes 1,3-dipolar cycloaddition in the dipole-LUMO controlled manner.View full abstract
- |<
- <
- 1
- >
- >|