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Volume 1, Issue 12
Displaying 1-26 of 26 articles from this issue
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Teiichiro Ogawa, Masaharu Tsuji, Minoru Toyoda, Nobuhiko Ishibashi1972 Volume 1 Issue 12 Pages 1157-1158
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe emission spectra of o-, m- and p-xylenes were observed by exciting them with controlled electron beam of 200 – 300 V. A characteristic band of the aromatic hydrocarbon was observed in the 270 – 320 nm region. However, the intensity and the vibrational structure of the band of p-xylene were different from those of o- and m-xylenes.View full abstract -
Takashi Matsumoto, Sachihiko Imai, Tomio Matsubayashi, Fukuko Tsunenag ...1972 Volume 1 Issue 12 Pages 1159-1162
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFriedel-Crafts reaction of methyl 12-bromodehydroabietate (IV) with acetyl chloride afforded methyl 13-acetyl-14-bromo-12-isopropyldeisopropyldehydroabietate (V), its cis-isomer (VI), and methyl 12-acetyldehydroabietate (VII). Conversion of V to sempervirol (I) was successfully carried out. The absolute configuration of sempervirol has also been assigned.View full abstract -
Akira Tahara, Hiromitsu Mizuno, Tomihiko Ohsawa1972 Volume 1 Issue 12 Pages 1163-1165
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBenzonilidene compound (2) underwent rearrangement to 3 with 1,2-methyl migration and vice versa. Using the rearrangement, selective substitution at C-l of dehydroabietic acid derivative was accomplished to give 5.View full abstract -
Hideo Nakamura, Hisashi Yamamoto, Hitosi Nozaki1972 Volume 1 Issue 12 Pages 1167-1168
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe title reaction at low temperature gives benzhydrol, whereas at higher temperature the normal adduct, 1,1-diphenyl-1-pentanol.View full abstract -
Isao Saito, Teruo Matsuura1972 Volume 1 Issue 12 Pages 1169-1172
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotosensitized oxygenation (a system generating singlet oxygen) of α,α′-dialkylstilbenes gave exclusively an allylic hydroperoxide, the “ene”reaction product, whereas the introduction of methoxy groups into their para positions causes a competition between “ene” reaction and cleavage to carbonyl fragments. In the latter case, a solvent dependence on the competition was observed.View full abstract -
Isao Saito, Mitsuru Imuta, Teruo Matsuura1972 Volume 1 Issue 12 Pages 1173-1176
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotosensitized oxygenation of 2-methylindole and 1,2-dimethylindole gave 2-methyl-2-[3-(2-methylindolyl)]indoxyl and its N,N′-dimethyl derivative, respectively, which were possibly formed through a hydroperoxide intermediate, whereas 1,2,3-trimethylindole underwent oxidative 2,3-cleavage to give o-(N-acetyl-N-methyl)aminoacetophenone.View full abstract -
Norio Kunieda, Hideaki Mochizuki, Masayoshi Kinoshita1972 Volume 1 Issue 12 Pages 1177-1180
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBenzoyl peroxide(BPO) decomposes readily in the presence of poly-p-N,N-dimethylaminostyrene(poly-DMAS), and the initial rate of the decomposition of BPO in the presence of poly-DMAS is about 23 times faster than that in the presence of N,N-dimethylaniline. The fact of the enhancement of the rate attributed to polymeric effect of poly-DMAS and the data of kinetics were discussed.View full abstract -
Tadao Shingaki, Masao Inagaki, Noboru Torimoto, Matsuji Takebayashi1972 Volume 1 Issue 12 Pages 1181-1184
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe insertion of methanesulfonylnitrene into C–H and O–H bonds was investigated by the photolysis of methanesulfonyl azide In hydrocarbons and in alcohols. The relative reactivity of the sulfonylnitrene toward C–H bonds of hydrocarbons was found to be smaller than that of ethoxycarbonylnitrene, whereas the reactivity of the sulfonylnitrene toward O–H bonds of alcohols was larger than that of the carbonylnitrene.View full abstract -
Otohiko Tsuge, Hideo Samura, Masashi Tashiro1972 Volume 1 Issue 12 Pages 1185-1188
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThermal decomposition of bisazide 1 in refluxing xylene afforded monoazide 6, which on heating in decaline under reflux converted into pyrazine 7. On the other hand, irradiation of 1 gave 1,2,4-triazine 8, which was obtained in excellent yield from photolysis of monoazide 6. The pathways for the formation of products are also suggested.View full abstract -
Ryoji Noyori, Isao Umeda, Hidemasa Takaya1972 Volume 1 Issue 12 Pages 1189-1190
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSBis(1,5-cyclooctadiene)nickel(0) catalyzes dimerization of 2,3-di-substituted cyclopropenones affording 1,4-benzoquinones. The reaction involves a bond cleavage at C-1–C-2 of the cyclopropenones.View full abstract -
Sanae Ikeda, Hiromu Satake1972 Volume 1 Issue 12 Pages 1191-1194
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSulfide, thiosulfate and suifite ions in their mixed solution were successively titrated without any separation procedure. These ions were precisely titrated with a silver nitrate solution by the potentiometric method using a silver–silver sulfide electrode and a silver–silver iodide electrode as the indicator electrodes. Sulfide and thiosulfate were titrated directly. Then, suifite was determined indirectly by titrating the iodide ion generated by addition of iodine.View full abstract -
Isao Saito, Masaaki Takami, Teruo Matsuura1972 Volume 1 Issue 12 Pages 1195-1196
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotolysis of m-chloronitrobenzene in the presence of methoxybenzenes resulted in oxidative ring-cleavage of the latters, which occurred selectively at the bond substituted with a methoxyl group. Thus 1, 3, and 5 gave 2, 4, and 6, respectively.View full abstract -
Isao Saito, Mitsuru Imuta, Teruo Matsuura1972 Volume 1 Issue 12 Pages 1197-1200
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSRose bengal-sensitized photooxygenation of N-methyl- (1a), N-methyl-6-nitro- (1b), and N-acetyl- (1c) 1,2,3,4-tetrahydrocarbazoles was investigated. The N-methyl derivatives underwent oxidative cleavage of the enamine double bond to give exclusively 2, whereas the N-acetyl derivative in water-containing solvents gave predominantly 3, possibly via a zwitterionic peroxide intermediate.View full abstract -
Kiichiro Kamata, Masahiro Yoshimura, Tetsuro Nakamura, Toshiyuki Sata1972 Volume 1 Issue 12 Pages 1201-1206
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOrdered perovskites, Ba2(LnMo)O6, Sr2(LnMo)O6 and Ba2(LnW)O6, were newly synthesized. The crystallographic, electrical and magnetic properties for these compounds were investigated. The magnetic moments of Mo5+ and W5+ were determined. Magnetic properties indicated that the interaction between Ln3+(4fn) and Mo5+ (4d1) or W5+(5d1) was fairly weak in these compounds.View full abstract -
Masanobu Tanaka, Toshikazu Nagai, Niichiro Tokura1972 Volume 1 Issue 12 Pages 1207-1210
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThermal or photochemical reaction of azibenzil (I) with molecular oxygen in benzene gave tetraphenylglycolide (II), instead of benzil or a cyclic peroxide, together with bis-benzilketazine (III) and diphenylketene (IV). The formation of II did not occur from III or IV, suggesting that phenyl benzoyl carbene reacted with molecular oxygen followed by phenyl migration.View full abstract -
Junji Furukawa, Jitsuo Kiji, Shin-ichi Mitani, Susumu Yoshikawa, Kazuy ...1972 Volume 1 Issue 12 Pages 1211-1212
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe cyclodimerization of butadiene catalyzed by bis(tri-n-butylphosphine)dibromonickel combined with sodium borohydride was investigated, using amines as protonic solvents. At 80°C a large amount of amine-adducts to butadiene was obtained together with 2-methylenevinylcyclopentane. The adducts were formed exclusively at room temperature.View full abstract -
Mituru Hiroi, Daisuke Takaoka1972 Volume 1 Issue 12 Pages 1213-1214
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS9-Oxonerolidol was obtained from the nonvolatile fraction of the leaf oil of camphor tree. Its constitution was determined by means of spectal and chemical analyses.View full abstract -
Yutaka Katsuhara, Toshiomi Nakamura, Akira Shimizu, Yasuo Shigemitsu, ...1972 Volume 1 Issue 12 Pages 1215-1218
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of a benzene solution of trimesic acid triesters and cyclooctene yielded exclusively 1:1 cycloadducts without formation of oxetane derivatives. The photoadducts were shown to be tetracyclo[6.6.0.0.2,703,6]tetradec-4-ene derivatives. The reactive species of the present reaction was suggested to be an exciplex.View full abstract -
Tohru Sakakibara, Tetsuyoshi Takamoto, Rokuro Sudoh, Toshio Nakagawa1972 Volume 1 Issue 12 Pages 1219-1222
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTreatment of methyl 4,6-O-benzylidene-2,3-dideoxy-3-nitro-β-D-erythro-hex-2-enopyranoside (1) with dimethylsulfoxonium methylide and dimethylsulfuranylidene acetophenone afforded the corresponding cyclopropane derivative 3 (75%) and 4 (71%), respectively. In the case of ethyl (dimethylsulfuranylidene) acetate, however, stable ylide (6) which involves two isomers was obtained in 75% yield. Catalytic reduction of 6 gave quantitatively ethoxycarbonylmethyl derivative (7) which has gluco-configuration.View full abstract -
Nobuo Tanaka, Aritsune Kaji, Jun-ichi Hayami1972 Volume 1 Issue 12 Pages 1223-1224
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSecondary deuterium isotope effects of about 12% were observed for reactions of chloromethyl aryl ethers or sulfides with radioactive chloride ion in CH3CN. 2-Arylethyl chlorides gave about 3% of the isotope effect. Magnitude of the isotope effect can also be a diagnostic of the looseness of the SN2 transition state.View full abstract -
Yoichi Iitaka, Toshio Sakamaki, Yoshiharu Nawata1972 Volume 1 Issue 12 Pages 1225-1230
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMolecular structures of tetranactin and its alkali metal ion complexes were determined by the X-ray crystal structure analysis. Molecular shape of free tetranactin is fairly flat, elongated and twisted, and outline of the molecule resembles that of propeller. Molecular conformation of the complexes is similar to that of K+-nonactin complex. A complex formation mechanism is proposed.View full abstract -
Tatsuaki Yamaguchi, Motoharu Nakayama, Touru Tsumura1972 Volume 1 Issue 12 Pages 1231-1234
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSKinetic measurements were reported for the catalytic hydrogenation of certain Schiff bases with bis(dimethylglyoximato)cobalt(II). The influences of substituents of Schiff bases upon the reactivity were shown to increase with the basicity, which were quite different pattern with that of the hydrogenation with pentacyanocobaltate.View full abstract -
Akio Takenaka, Yoshio Sasada, Ei-ichi Watanabe, Hisanobu Ogoshi, Zen-i ...1972 Volume 1 Issue 12 Pages 1235-1238
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe crystal structure of bis(imidazole)octaethylporphinatoiron(III) perchlorate has been determined by the X-ray method. The monoclinic unit-cell dimensions are a=10.50, b=26.10, c=9.65 Å and β=103.6°. The space group is P21/m and there are two formula units and four chloroform molecules in the unit cell. The iron atom is strictly coplanar with the four porphinato nitrogen atoms, and these four and two imidazole nitrogen atoms form an approximately regular octahedron. The complex cations contact with the perchlorate anions at their non-coordinated imidazole nitrogen atoms.View full abstract -
Naoya Nakagawa, Kunio Niki, Yoshito Takeuchi, Izumi Kumagai1972 Volume 1 Issue 12 Pages 1239-1242
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe aromatic solvent-induced shift (ASIS) has been explained in terms of the dipole-induced dipole interaction. It can hardly account for the experimental results. The dipole-quadrupole interaction seems better to explain ASIS. A preliminary calculation has been carried out for acetone in benzene.View full abstract -
Keitaro Yoshihara, Kazuyoshi Futamura, Saburo Nagakura1972 Volume 1 Issue 12 Pages 1243-1247
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSFrom the measurement of absorption and fluorescence spectra, a 1:1 electron-donor-acceptor complex formation in the ground state was confirmed for the pyrene-N,N-dimethylaniline system which is a well-known exciplex formation system, the equilibrium constant being determined to be 0.2 M−1.View full abstract -
Tadatoshi Kubota, Hiroshi Sakurai1972 Volume 1 Issue 12 Pages 1249-1250
Published: December 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of an acetic acid solution of trans-stilbene and 1-methylpyrrole afforded 1-methyl-2-(1,2-diphenylethyl)pyrrole (I), 1-methyl-3-(1,2-diphenylethyl)pyrrole (II), and 1,2-diphenylethyl acetate (III), though irradiation of stilbene in neat 1-methylpyrrole gave complex mixtures.View full abstract
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