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Volume 5, Issue 9
Displaying 1-36 of 36 articles from this issue
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Teruaki Mukaiyama, Ko Hojo1976 Volume 5 Issue 9 Pages 893-896
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA convenient method for optical interconversion of enantiomeric secondary alcohols was established according to the following procedures: treatment of optically active 2-alkyloxybenzothiazolium salt , formed in situ from 2-fluoro salt I and optically active secondary alcohols, with trichloroacetic acid to give the corresponding esters with inversion of configuration, and facile hydrolysis of the esters to alcohols with retention.View full abstract -
Naoyuki Todo, Akio Nishijima, Akifumi Ueno, Minoru Kurita, Hiroyuki Ha ...1976 Volume 5 Issue 9 Pages 897-900
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe effect of counter anions on the catalytic activities of cupric and ferric ions, when salts of them are used as catalysts for the reduction of nitric oxide with ammonia, was investigated. The order of the co-catalyst activity of the counter anions investigated is Br−, Cl−, SO42−, and O2−.View full abstract -
Yujiro Nomura, Naoto Hatanaka, Yoshito Takeuchi1976 Volume 5 Issue 9 Pages 901-904
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBy the thermal decomposition of α- or β-azidostyrene and 2-azido-trans-2-butene in acrylonitrile or methyl acrylate were obtained 2-substituted 1-(1-phenylvinyl)aziridine, 1-trans-styrylaziridine, and 1-(1-methyl-cis-propenyl)aziridine, respectively, in good yields.View full abstract -
Hidefumi Hirai, Yukimichi Nakao, Naoki Toshima, Koichi Adachi1976 Volume 5 Issue 9 Pages 905-910
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA colloidal rhodium has been prepared by reduction of rhodium(III) chloride with methanol in the presence of polyvinyl alcohol. The particle size distribution of the metallic rhodium is narrow ranging from 30 to 70 Å with a maximum at 35 Å. The colloidal dispersions in methanol-water solutions are effective for the hydrogenation of olefins at 30°C under an atmospheric hydrogen pressure.View full abstract -
Ryokichi Tsuchiya, Eishin Kyuno, Akira Uehara, Seiji Joba, Shigeki Ohb ...1976 Volume 5 Issue 9 Pages 911-914
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction involving the increase of the coordination number from four to six, viz, the transformation from square planar to octahedral was found in the benzimidazole complex, [Ni(bimd)4](NO3)2·2.5C2H5OH upon heating. The transformation was considered to be due to the approach of the nitrate ions toward the central ion along the vertical axis.View full abstract -
Yutaka Ohnishi, Masayuki Kagami, Takashi Numakunai, Atsuyoshi Ohno1976 Volume 5 Issue 9 Pages 915-916
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAsymmetric reduction of an olefin is achieved with a chiral NAD(P)H-model compound in the presence of magnesium perchlorate which represses a side reaction catalyzed by a base.View full abstract -
Kazuhiko Tanaka, Rikuhei Tanikaga, Aritsune Kaji1976 Volume 5 Issue 9 Pages 917-920
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSα,β-Unsaturated esters have been easily synthesized in good yields by treating carbonyl compounds with O-alkyl S-ethoxycarbonylmethyl dithiocarbonates or thiocarbonate in the presence of lithium diisopropylamide. The key intermediates for the synthesis of the recently isolated boll weevil sex pheromone were prepared in good yields by this method.View full abstract -
Shun-ichi Yamada, Shun-ichi Hashimoto1976 Volume 5 Issue 9 Pages 921-926
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSD-Phenylglycine, an important constituent of penicillin and cephalosporin antibiotics, was asymmetrically synthesized by hydrocyanation of the Schiff bases prepared from benzaldehyde and L-amino acid t-butyl esters, followed by oxidative decarboxylation. When L-ψ-leucine t-butyl ester was used as a chiral reagent, the optical yield of D-phenylglycine Increased to 96.5%.View full abstract -
Shun-ichi Yamada, Kenji Koga, Tzuoh Miin Juang, Kazuo Achiwa1976 Volume 5 Issue 9 Pages 927-932
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS(R)- and (S)-tropic acid were prepared by trifluoroacetolysis of O-nitrobenzenesulfonate((S)-III) of optically active 3-phenyllactic acid ester(S)-II) in good yield and with high retention of optical purity according to the biosynthetic pathway starting from L-phenylalanine(L-I). Based on the above findings, natural (−)-littorine(VIII) and (−)-hyoscyamine(X) were synthesized from D-phenylalanine.View full abstract -
Jörn Schmidt, Dieter Rehder1976 Volume 5 Issue 9 Pages 933-936
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhoto-induced ligand exchange between [Co(NO)2X]2 (X = Cl, Br, I) and [Cr(CO)6] dissolved in THF yields solutions which contain –according to e.s.r. spectra– [Cr(NO)X2(THF)n] species. Spin densities, coupling constants, and g values are discussed in the light of varying Cr/X interaction. E.s.r. measurements of the frozen solutions lead to the assumption that g values are anisotropic.View full abstract -
Masaaki Yokoyama, Makoto Hanabata, Toshiaki Tamamura, Takeshi Nakano, ...1976 Volume 5 Issue 9 Pages 937-940
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe carrier photogeneration mechanism has been investigated in N-vinylcarbazole(VCz)-1-vinylnaphthalene(VNa) copolymer. The photocurrent as well as the delayed fluorescence of carbazole chromophore due to the triplet–triplet (T–T) annihilation are found to be enhanced by introducing a few mole per cent of VNa units. The photocurrent shows a quadratic dependence upon the illumination light intensity in a high field. In the light of the emission study, the following carrier photogeneration involving T–T annihilation is found to occur in the VCz–VNa copolymer: (Remark: Graphics omitted.)Here, Cz and Na represent the carbazole and naphthalene chromophores, and the asterisk and double asterisk indicate the lowest and higher excited states, respectively.View full abstract -
Akira Hosomi, Masahiko Endo, Hideki Sakurai1976 Volume 5 Issue 9 Pages 941-942
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of allylsilanes with acetals in the presence of titanium tetrachloride afforded homoallyl ethers in good yields. The reaction took place regiospecifically with transposition of the allyl group.View full abstract -
Tamotsu Fujisawa, Hiromichi Ohta, Takeo Kobori, Kazumi Hata, Kunikazu ...1976 Volume 5 Issue 9 Pages 943-946
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA method for the selective introduction of two alkyl groups into the vicinal positions of cyclopentadiene was investigated by treating esters of cyclopentadienylethanols, prepared from sodium cyclopentadienide and epoxide, with a base, followed by reduction with lithium aluminum hydride. 2-(2-Methylcyclopentadienyl)ethanol thus obtained was transformed to allethrolone via several steps.View full abstract -
Yoshio Hoshino, Taizo Utsunomiya, Keitarou Fukui1976 Volume 5 Issue 9 Pages 947-950
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe graphite furnace atomic absorption spectrometry (AAS) is improved by utilizing tungsten wire as an adsorbing material. This method has 20 to 50 times higher sensitivity compared to the conventional aliquot-sampling flameless AAS. Interferences of large amounts of coexisting alkali salts can be effectively eliminated.View full abstract -
Yoshinori Kidani, Shinobu Naga, Hisashi Koike1976 Volume 5 Issue 9 Pages 951-954
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn the presence of Co(III) mixed ligand complexes with acetylacetonate, and oxinate and monomethyloxinate ions, the authors attempted to employ high performance liquid chromatography, HPLC, for the separation and purification of the mixed ligand complexes and the reverse phase mode was found to be appropriate. Optimal reaction conditions of the synthesis have been studied.View full abstract -
Masayoshi Onishi, Yushichiro Ohama, Koji Sugimura, Katsuma Hiraki1976 Volume 5 Issue 9 Pages 955-958
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS(N,N-Dimethylbenzylamine,2-C,N)(BPz4)Pd(II) (Pz=1-pyrazolyl), (2-phenylpyridine,2′-C,N)(BPz4)Pd(II), (azobenzene,2-C,N)(BPz4)Pd(II), [benzo(h)quinoline,2-C,N](BPz4)Pd(II), and (N,N-dimethylbenzylamine, 2-C,N)(HBPz3)Pd(II) were prepared. Pyrazolyl groups of these complexes were found to show a fluxional behavior on the basis of 1H-NMR spectra.View full abstract -
Miho Fujita, Yuzo Yoshikawa, Hideo Yamatera1976 Volume 5 Issue 9 Pages 959-962
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA column-chromatographic method has been successfully applied to the separation of all the four possible isomers of [Co(sar)(en)2]2+ (sar=CH3NHCH2COO−, en = H2NCH2CH2NH2), to the correlation of their absolute configuration, and to the determination of the difference in stability between the diastereomers (0.9 kcal/mol).View full abstract -
Kazuo Mochida, Yoshihisa Matsui1976 Volume 5 Issue 9 Pages 963-966
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe formation of a 2:1 complex between copper(II) and α- or β-cyclodextrin was examined in an alkaline solution by means of a stopped-flow spectrophotometer. The reaction involves a first-order rate process corresponding to the cross-linking of a cyclodextrin ring by a Cu(OH−)2Cu or Cu(OH−)(O2−)Cu ion bridge.View full abstract -
Fumio Nozaki, Takashi Sekura, Masaji Kawai1976 Volume 5 Issue 9 Pages 967-970
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe Ni-P catalyst prepared by reduction of Ni3(PO4)2 in hydrogen promoted selectively the dehydrogenation of methylcyclohexane to toluene. The repeated reoxidation-reduction of the catalyst resulted in an increase in dehydrogenation activity.View full abstract -
Tohru Koyanagi, Jun-ichi Hayami, Aritsune Kaji1976 Volume 5 Issue 9 Pages 971-974
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAn iron-stabilized thiocarbonyl ylide was generated by the reaction of bis(α-bromobenzyl) sulfide with diiron nonacarbonyl. This species was not a typical 1,3-dipole, but underwent a [2+4] type addition reaction with furan.View full abstract -
Akio Murai, Hiroshi Sasamori, Tadashi Masamune1976 Volume 5 Issue 9 Pages 975-978
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of 11α-hydroxy-, 11α-acetoxy-, and 11-oxo-17α-acetyl-12α,13α-epoxyetiojervanes (1, 1a, and 11) with boron trifluoride etherate gave mixtures of several compounds, respectively, including interesting rearranged products, e.g., compounds (12 and 13) with bicyclo[3.3.1]nonane-2,9-dione and hydrooxepin moieties.View full abstract -
Ushio Sakaguchi, Toshiaki Taura, Hayami Yoneda1976 Volume 5 Issue 9 Pages 979-982
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt is found that in the pentammine(L-histidine)cobalt(III) ion, the imidazole C(5) proton is coupled to only one of the methylene protons with 4JHH=0.9 Hz and the internal rotation of the imidazole ring around the Cβ–Cγ bond is hindered presumably due to an intramolecular hydrogen bonding.View full abstract -
Masaaki Iwata, Hiroyoshi Kuzuhara, Sakae Emoto1976 Volume 5 Issue 9 Pages 983-986
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe relationship of the hindered rotation with the ring size in phane derivatives of pyridoxine and pyridoxal was investigated with the aid of the appearance of an AB quartet signal in PMR spectra at ambient or elevated temperature, and it was found that phane derivatives with the ring size equal to or less than fourteen members could be optically resolved into enantiomers.View full abstract -
Tsujiaki Hata, Iwao Nakagawa, Kunitada Shimotohno, Kin-ichiro Miura1976 Volume 5 Issue 9 Pages 987-990
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSα,γ-Dinucleoside triphosphates showing the recently discovered modified structure at the 5′-terminus of eukaryote mRNA were synthesized by use of a new method employing di-n-butylphosphinothioyl bromide.View full abstract -
Koji Yamakawa, Reiji Sakaguchi, Tadaharu Nakamura, Kensuke Watanabe1976 Volume 5 Issue 9 Pages 991-992
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe total synthesis of (±)-norketotrichodiene (14) is described. The photocycloaddition reaction of 3,6-dimethylcyclohexenone and cyclotene afforded the tricyclo[4.3.23,5.O1,6]undecane derivatives (4 and 5). The retro-aldol reaction of (4) with alkali gave triketone (6a), which was converted to the tosylate (6b). Catalytic hydrogenolysis of (6b) yielded the ketol (10). Treatment of (10) with POCl3-pyridine gave (±)-norketotrichodiene (14) which was identical with the norketone (14) derived from (+)-trichodiene (1).View full abstract -
Isao Kuwajima, Toru Abe, Naoki Minami1976 Volume 5 Issue 9 Pages 993-994
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOn treating 1,1-bis(trimethylsilyl)alkan-1-ol with t-butyl hypochlorite, the corresponding acylsilane is obtained in good yield, while the reaction of the alcohol with NBS, in contrary, affords α-bromoacylsilane exclusively.View full abstract -
Kiyotomi Kaneda, Masami Terasawa, Toshinobu Imanaka, Shiichiro Teranis ...1976 Volume 5 Issue 9 Pages 995-998
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA paramagnetic bivalent rhodium complex was selectively formed by the reaction of phosphinated polystyrene with RhCl3·3H2O in ethanol. The characterization of the rhodium complex was carried out by the use of IR, ESR, and ESCA spectrometers. This complex was active for hydrogenation of olefins. The remarkable features of the hydrogenation are described.View full abstract -
James F. Haley, Jr., Philip M. Keehn1976 Volume 5 Issue 9 Pages 999-1002
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA temperature dependent conformational change in the aliphatic chain of 3,6-diketo[8]naphthalenophane is observed by variable temperature nuclear magnetic resonance spectroscopy; the energy of activation for the process is 9.4±0.2 Kcal/mole. For 3,6-diketo[8](2,5)furanophane the conformational change of the chain is more facile than that of the ring with a conservative upper limit for ring rotation of about 9.1 Kcal/mole.View full abstract -
Haruhiko Tomoda, Eiji Hibiya, Takayoshi Nakamura, Hiroki Ito, Shojiro ...1976 Volume 5 Issue 9 Pages 1003-1006
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIt was found that roomlight accelerates the formation of phthalocyanine in the reaction of phthalonitrile with sodium alkoxide at elevated temperatures. Moreover, UV irradiation gave phthalocyanine even at room temperature where no formation of phthalocyanine was observed without light.View full abstract -
Yusaku Ikegami, Hidetoshi Watanabe1976 Volume 5 Issue 9 Pages 1007-1010
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA neutral free radical, 1-benzyl-4-methoxycarbonylpyridinyl is stable in the dark, but decomposes by light irradiation to generate benzyl radical. Association of the radical at low temperature has been investigated.View full abstract -
Masaji Oda, Hideo Miyazaki, Yoshio Kitahara1976 Volume 5 Issue 9 Pages 1011-1014
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThermolysis of the ois title compound 4 yields a cage molecule 6 by a sequential ring opening of the cyclobutene and intramolecular Diels–Alder reaction. On the other hand, the trans isomer 8 gives 2,3-benzo-2,5-cyclooctadiene-1,4-dione 10 by a ring opening followed by hydrogen shifts and an oxidation. While the former reaction shows a marked substituent effect, the latter does not. An unusual conformation of 10 is suggested.View full abstract -
Satoshi Ebina, Hisashi Uedaira1976 Volume 5 Issue 9 Pages 1015-1018
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe electric conductivities of sodium i-butyrate and trimethylacetate were measured in water at 25°C. It was shown that the molar conductivities of both solutions reach a maximum at a concentration of about 1 mol m−3 (McBain effect), and that the hydrophobic interaction of i-butyrate and trimethylacetate ions is so strong that these ions form a dimer.View full abstract -
Ryuichi Nakamura, Shuichi Matsumoto, Etsuro Echigoya1976 Volume 5 Issue 9 Pages 1019-1024
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSWC16/(CH3)3Al2Cl3 and Mo(OC2H5)2Cl3/(CH3)3Al2Cl3 were found to be the effective catalysts for the metathesis of alkenes having various functional groups such as –COOR, –OCOR, –OR, –CN, –COR, and –CONR2. These reactions should be quite important in a synthesis of telechelic compounds or bioactive substances such as sex attractant pheromones.View full abstract -
Eiji Wada, Takeshi Nakai, Makoto Okawara1976 Volume 5 Issue 9 Pages 1025-1028
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new sequence for cyclopentenone annelation is described which involves the rearrangement of protonated bicyclic acetylcyclopropanes as a key step. Applications of the annelation procedure to cyclohexene and cycloheptene afforded the bicyclo[4.3.0]nonane and bicyclo[5.3.0]decane frameworks, respectively. Further elaboration of the bicyclodecane derivative provides a simple and efficient synthetic route to 2-substituted azulenes.View full abstract -
Tetsuo Osa, Shigeaki Fujieda, Yasuhiko Abe1976 Volume 5 Issue 9 Pages 1029-1032
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCatalytic oxidation of nitric oxide with nitric acid was carried out in the presence of various metal salts. Copper, iron, cobalt and nickel ions had catalytic activity. The influences of temperature and contact time were examined. The possibility of the application to the pretreatment for the removal of nitrogen oxides was discussed.View full abstract -
Teruaki Mukaiyama, Kazuhiko Saigo, Osamu Takazawa1976 Volume 5 Issue 9 Pages 1033-1036
Published: September 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSγ-Ionone was successfully synthesized without accompanying any isomeric substances such as α- and β-ionones by dehydration of a key intermediate, 4-(6-methylene-2,2-dimethylcyclohexyl)-4-hydroxy-2-butanone, prepared from γ-cyclocitral and acetone by the use of di-n-butylboryl trifluoromethanesulfonate and triethylamine as coupling reagents.View full abstract
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