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Volume 3, Issue 5
Displaying 1-32 of 32 articles from this issue
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Mitsuo Chubachi, Masayuki Hamada1974 Volume 3 Issue 5 Pages 397-400
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the photooxygenation of rotenone(I) in pyridine solution, two isomers of rotenolones, 6aβ, 12aβ- and 6aβ, 12aα-rotenolones (II and III), were obtained besides dehydrorotenone(V) and rotenonone(VI). As one of acidic products, a keto-acid (IVa) was also isolated.View full abstract -
Takeo Taguchi, Yoshinari Sato, Kenzo Watanabe, Teruaki Mukaiyama1974 Volume 3 Issue 5 Pages 401-404
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt was established that N-protected 2(1H)-imidazolone derivatives are conveniently prepared by the reaction of benzyl N-potassium-N-cyanocarbamate [Ia] or ethyl N-potassium-N-cyanocarbamate [Ib] with α-halo carbonyl compounds. N-Protecting group, benzyloxycarbonyl or ethoxycarbonyl group, was easily removed either by hydrogenation on Pd–C or alkaline hydrolysis to afford 2(1H)-imidazolone in good yields.View full abstract -
Manabu Seno, Shinji Tsuchiya, Teruzo Asahara1974 Volume 3 Issue 5 Pages 405-408
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe nature of the phosphorus-carbon ylide bond was investigated by means of XPS. The binding energies of P-2p electrons of Ph3P=CHCOR (R=p-nitrophenyl, phenyl, p-methoxyphenyl) were found to be lower than that of Ph3P=CHCOOMe. The binding energies of ylides are lower than those of the corresponding salts. These results are qualitatively consistent with IR data and 13P-nmr data.View full abstract -
Hitoshi Iwasaki1974 Volume 3 Issue 5 Pages 409-410
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn X-ray study on the structure of adenine dihydrochloride has revealed that the base ions are protonated at N(1) and N(7). As a result of the protonation at N(7), the geometry of the imidazole ring differs significantly from those observed in neutral and N(1)- monoprotonated bases.View full abstract -
Atsushi Takeuchi, Ken-ichi Tanaka, Koshiro Miyahara1974 Volume 3 Issue 5 Pages 411-416
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSulfurated nickel is catalytically inactive for the hydrogenation of olefin but active for the isomerization of butene and the C2H4–C2D4 exchange reaction in coexistence of hydrogen.
On contaction with acetylene, the surface becomes active for the hydrogenation of olefin and the H2–D2 equilibration as well as the hydrogenation of acetylene. These characteristics are well described by the degree of coordinative unsaturation of active sites suggested by Siegel.View full abstract -
Sukekatsu Nozaki, Ichiro Muramatsu1974 Volume 3 Issue 5 Pages 417-418
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS[2-Serine, 8-valine]-human calcitonin, an analog peptide, was synthesized by a liquid phase method, and exhibited a hypocalcemic activity of 80–120 MRC units.View full abstract -
Ken-ichi Hara, Motomichi Inoue, Tatsuo Horiba, Masaji Kubo1974 Volume 3 Issue 5 Pages 419-422
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe magnetic susceptibility of tris(2,2′-dipyridyl)manganese complexes, [Mn(dipy)3] · 2THF and Li[Mn(dipy)3] · 4THF (THF: tetrahydrofuran), has been determined over a temperature range of 1.5–300 K. The susceptibility of Li[Mn(dipy)3] · 4THF can be explained with a radical ion model, in which three 2,2′-dipyridyl radical ions are coordinated to a manganese(II) ion, suggesting the formula [Mn2+(dipy−)3]− rather than [Mn−(dipy0)3]−. A similar model is applicable to [Mn(dipy)3] · 2THF as well.View full abstract -
Yoshihiro Enomoto, Teiichi Ito, Muraji Shibata1974 Volume 3 Issue 5 Pages 423-426
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTwo new complexes having cis, cis-geometry with respect to unidentate ligands, Na[Co(CN)2CO3(NH3)2]·2H2O and [Co(C2O4)(H2O)2(NH3)2]NO3, have been prepared and their resolutions have also been achieved.View full abstract -
Eiichi Haruki, Munekazu Arakawa, Noboru Matsumura, Yoshio Otsuji, Eiji ...1974 Volume 3 Issue 5 Pages 427-428
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSVarious active methylene compounds were carboxylated by employing the reagent system, 1,8-diazabicyclo(5.4.0)-7-undecene and carbon dioxide, in organic solvents or without solvent at room temperature.View full abstract -
Tetsuro Nakamura1974 Volume 3 Issue 5 Pages 429-434
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBaThO3 had an orthorhombic lattice (a=6.345Å, b=6.376Å, c=8.992Å) with four pseudomonoclinic perovskite units(a′=c′=4.498Å, b′=4.496Å, β=90°17′). Ba2(BaU)O6 was a tetragonal, ordered perovskite(a=b=6.286Å, c=8.972Å). Ahrens′ radius of octahedral Ba2+ in Ba2(BaU)O6 was evaluated to be 1.16Å via a lattice parameter variation versus radius of M4+ ion in perovskites BaMO3.View full abstract -
Mitsutomo Tsuhako, Itaru Motooka, Masamitsu Kobayashi1974 Volume 3 Issue 5 Pages 435-438
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTitanium tetrametaphosphate Ti4(P4O12)3 is readily formed in a nitrogen stream or vacuum. It is found from the X-ray diffraction pattern that Ti4(P4O12)3 is isomorphous with the A type of aluminum tetrametaphosphate Al4(P4O12)3. Ti4(P4O12)3 shows a large exothermic peak at 250∼400°C and a small endothermic peak at 650∼660°C, and this compound is gradually converted at 250∼400°C to give titanium pyrophosphate TiP2O7 and P2O5.View full abstract -
Kou Hatada, Masatoshi Shimada, Katsuhiro Fujita, Yoshio Ono, Tominaga ...1974 Volume 3 Issue 5 Pages 439-442
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSynthetic zeolites are found to be effective catalysts for ring transformation of heterocycles. Furan reacts with ammonia over BaY to form pyrrole in 100% selectivity at 330°C. Tetrahydrofuran is converted to pyrrolidine in 70% selectivity over HY and MgY at 320°C, and γ-butyrolactone is converted to 2-pyrrolidone in 80% selectivity over CuY.View full abstract -
Tadashi Endo, Kuniyuki Oda, Teruaki Mukaiyama1974 Volume 3 Issue 5 Pages 443-444
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt has been found that thiols having functional groups susceptible to hydrolysis and reduction such as acylurea and nitro groups are readily prepared in high yields by simply treating the corresponding thiolesters with cysteamine in acetonitrile at 65°C for 10–40 min.View full abstract -
Tsunetoshi Kobayashi, Saburo Nagakura, Zen-ichi Yoshida, Hisatoshi Kon ...1974 Volume 3 Issue 5 Pages 445-448
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe photoelectron spectra of bisdimethylaminocyclopropenone, bisdiisopropylaminocyclopropenone, and bisdimethylaminocyclopropenethione were measured and interpreted systematically in terms of MO’s obtained by the EHMO metho-d, their energies being found to decrease in the following order: b1π> carbonyl or thiocarbonyl b2n > a2π> b1π.View full abstract -
Frieder W. Lichtenthaler, Arnold Heerd, Kurt Strobel1974 Volume 3 Issue 5 Pages 449-452
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOn the basis of ten SnCl4-catalyzed N-glycosidations of silylated uracil (1) and N-acetylcytosine (2) with per-O-acyl-glycoses from uronic acids, aminosugars and simple hexoses, the scope of the procedure is evaluated, a major concern being the formation of N-3 nucleosides from 1.View full abstract -
Nobuyuki Tanaka, Yoshikiyo Kato, Akifumi Yamada, Eishin Kyuno1974 Volume 3 Issue 5 Pages 453-456
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPolarographic reduction waves of In(III) in the presence of pentaammineiodo- or pentaammineisothiocyanatocobalt(III) complexes have been investigated. The catalytic effect on the electrode process of In(III) by iodide or thiocyanate ions which were liberated from the cobalt(II) complexes reduced simultaneously at the electrode was confirmed experimentally. A marked difference was found in the acceleration process between thiocyanate and iodide ions of these electrode reactions.View full abstract -
Kenji Yamamoto, Toshiaki Enoki, Teruaki Fujito, Akira Nakajima, Hiroak ...1974 Volume 3 Issue 5 Pages 457-460
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMagnetic susceptibilities of organic stable radicals, derivatives of 2,2,6,6-tetramethyl-4-hydroxypiperidine-1-oxyl (TANOL), have been measured. The magnetic susceptibility of Ethyl-TANOL showing a broad maximum at a temperature of 0.17 K agrees well with the antiferromagnetic Heisenberg linear chain model, while that of Methyl-TANOL exhibits a characteristic feature of the three dimensional antiferromagnet.View full abstract -
Akio Tajiri, Masahiro Hatano1974 Volume 3 Issue 5 Pages 461-466
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe magnetic circular dichroism (MCD) spectra of indenyl anion was measured. The Faraday B terms were observed for bands in the range of wavelength 210∼400nm. Experimental B/D values were estimated to be +1.41×10−4, +1.84×10−4, +9.09×10−5 and −9.80×10−5 (β/cm−1) for four regions of absorption corresponding to electronic transitions A1→B2, A1→A1, A1→A1 and A1→B2, respectively. Thus MCD technique was shown to be applicable to the assignment of absorption bands.View full abstract -
Kazuhiro Maruyama, Tomoji Takahashi1974 Volume 3 Issue 5 Pages 467-470
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe dynamic aspects of photochemical reactions of camphorquinone with aliphatic aldehydes were investigated by means of CIDNP. Besides that the two types of stable products (1)–(3) could be produced through ionic rearrangement of unstable intermediates (6), (7) arose from radical pair (5), the reverse hydrogen atom abstraction reaction was found to occur between the two radicals resulted from the reaction of photo-excited camphorquinone and aldehyde.View full abstract -
Kazuhiro Maruyama, Akio Takuwa1974 Volume 3 Issue 5 Pages 471-474
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS3-Acyl-1,2-naphthoquinols and 1,2-naphthoquinol monoacylesters were produced in the photochemical reactions of 1,2-naphthoquinones with a variety of aliphatic aldehydes. From the photochemical reactions of 3-halogeno-1,2-naphthoquinones with aliphatic aldehydes were obtained also 3-acyl-1,2-naphthoquinols; that is, the same products with those from the photochemical reactions of 1,2-naphthoquinone with aliphatic aldehydes, accompanying with 3-halogeno-1,2-naphthoquinol. monoacylesters.View full abstract -
Hirochika Sakuragi, Katsumi Tokumaru1974 Volume 3 Issue 5 Pages 475-476
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of benzaldehyde in methanol, ethanol, and 2-propanol under oxygen atmosphere gave methyl, ethyl, and isopropyl benzoate, respectively, and their yields were increased when a catalytic amount of hydrochloric acid was present.View full abstract -
Tamizo Kogane, Haruo Yukawa, Reiko Hirota1974 Volume 3 Issue 5 Pages 477-478
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFrom ESR spectra measurements we report that bis(acetylacetonato)copper(II) forms 1:2 adduct with weak Lewis bases containing oxygen or nitrogen.View full abstract -
Jasjit Singh Walia1974 Volume 3 Issue 5 Pages 479-480
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe structure of the product of reaction of 2,3-diphenyl-5,6-dihydropyrazine (1) with potassium cyanide and glacial acetic acid is established to be 2,3-dicyano-2,3-diphenyl-hexahydropyrazine (3) rather than the reported N,N′-dicyano-2,3-diphenylhexahydropyrazine (2).View full abstract -
Takaharu Honjo1974 Volume 3 Issue 5 Pages 481-484
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe synthesis of a new chelating reagent, l,l,l-trifluoro-4-(2-thienyl)-4-seleno-3-buten-2-one (SeTTA) by the reaction of hydrogen selenide in a stream of nitrogen gas with TTA in absolute ethanol in the presence of hydrogen chloride is described. The analytical application of SeTTA is also discussed.View full abstract -
Yoshinori Yamamoto, Hiroo Toi, Ichiro Moritani1974 Volume 3 Issue 5 Pages 485-488
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSHydroboration of 2-bromonorbornene with 9-borabicyclo[3.3.1]nonane (9-BBN) places the boron atom predominantly on the beta-position to the bromine substituent. On the other hand, in the hydroboration of 2-chloronorbornene the boron goes alpha to the chlorine substituent. The directive effect of the bromine is discussed.View full abstract -
Kohji Watanabe, Jun Yamauchi, Hiroaki Ohya-Nishiguchi, Yasuo Deguchi, ...1974 Volume 3 Issue 5 Pages 489-492
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSENDOR spectra of α,α,γ,γ-bisdiphenylene-β-phenyl allyl radical and its derivatives have been observed and the hyperfine splitting constants and spin density distribution have been determined.
At low temperature below −85 °C the allyl skeleton twists unsymmetrically on either sides and the wagging activation energy is estimated to be about 2.5 kcal/mole.View full abstract -
Nobuo Yoshida, Nobuhiko Ishibashi1974 Volume 3 Issue 5 Pages 493-496
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe selectivity coefficient of a liquid ion-exchange membrane, in which an ion-exchange site and counter ions are at almost complete dissociation, was studied by a kind of the bi-ionic membrane potential methods. A limiting selectivity coefficient was introduced as an intrinsic quantity of a pair of counter ions for a given membrane and shown to be consistent with the Sandblom–Eisenman–Walker theory on the relation between the selectivity coefficient and ionic parameters.View full abstract -
Takahisa Machiguchi, Yoshio Inagaki, Masamatsu Hoshino, Yoshio Kitahar ...1974 Volume 3 Issue 5 Pages 497-498
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAnalyses of the C-13 FT-NMR spectra of tropothione (I) appeared recently as a new troponoid compound and its parent tropone (II) in dilute solutions are reported in order to evaluate the aromatic character in (I). Polyolefinic character of (I) is confirmed and remarkable differences in chemical shifts between (I) and (II) are observed in accordance with the SCF MO calculations.View full abstract -
Bunzo Kamo, Toshiyasu Sakai, Minoru Sudo, Masaharu Inaba, Shijo Furusa ...1974 Volume 3 Issue 5 Pages 499-502
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe microfine structure of poly(2-methylenetetrahydrofuran) obtained by various cationic catalysts was studied by NMR spectroscopy. Only a quartet was observed for the backbone methylene protons of the ethyl methyl ketone-insoluble polymer, which was found to be crystalline by X-ray analysis. The polymer is suggested to be primarily isotactic in nature.View full abstract -
Yoshiaki Nakashima, Ushio Sakaguchi, Hayami Yoneda1974 Volume 3 Issue 5 Pages 503-508
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe theoretical relation has been established between proton and cobalt-59 chemical shifts in [Co(NH3)5X] by assuming that proton shifts come mainly from the paramagnetic anisotropy in Co(III) ion. The relation, coupled with Co-59 shift data, can explain very well proton shifts in these complexes.View full abstract -
Satoshi Inagaki, Kenichi Fukui1974 Volume 3 Issue 5 Pages 509-514
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOrigin and direction of nonequivalent extending of orbitals with symmetric density distribution under influence of weakly conjugative entity was considered in a general manner. An application of the obtained results was found to shed new light on exo-stereoselectivity in electrophilic addition to norbornene.View full abstract -
Norihisa Osaka, Shigeyoshi Mizogami, Tetsuo Otsubo, Yoshiteru Sakata, ...1974 Volume 3 Issue 5 Pages 515-518
Published: May 05, 1974
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSNon-substituted double, triple, and quadruple layered paracycloheterophanes, I∼III, were synthesized. Their nmr spectra demonstrate the fixation of thiophene ring and the internal inversion of furan ring at room temperature. The electronic spectra show trans-annular electronic interaction among chromophores.View full abstract
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