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Volume 1, Issue 4
Displaying 1-20 of 20 articles from this issue
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Fujito Nemoto, Kazuhiko Ishizu, Hideo Hasegawa1972 Volume 1 Issue 4 Pages 267-268
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe ESR spectra of the 4,4′-di-n-propyl biphenyl anion have been observed in either DME or DMF with reduction by potassium. The experimental evidence suggests that an anomalous restricted rotation of the alkyl group takes place in the 4,4′-di-n-propyl biphenyl anion, where the alkyl-β-protons exhibit the nonequivalent splittings in a solution.View full abstract -
Isamu Akiyama, Masaji Onaya, Akira Hayakawa, Yojiro Tsuzuki1972 Volume 1 Issue 4 Pages 269-272
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSSeveral DL-amino acid menthyl ester hydrochlorides were synthesized and attempted to resolve by means of paper chromatography with various buffer solutions. It was found that the three amino acid (Phe, Trp, and Tyr) derivatives were completely resolved with “CM-Cellulose” paper.View full abstract -
Ryuichi Nakamura, Hiroshi Iida, Etsuro Echigoya1972 Volume 1 Issue 4 Pages 273-275
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSMetathesis of isobutene with cis-2-butene was studied over MoO3–Al2O3 and Re2O7–Al2O3 catalysts using a flow reactor. Effects of alkali addition to MoO3–Al2O3 and of reaction temperature on the reaction results were investigated. With Re2O7–Al2O3, a satisfactory yield of isoamylene was obtained with a high degree of selectivity.View full abstract -
Etsuro Echigoya, Atsuo Kobayashi1972 Volume 1 Issue 4 Pages 277-279
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe codimerization of propylene with ethylene on various solid catalysts was investigated and the results compared with the dimerization reaction of ethylene and propylene. NiO–WO3–Al2O3 catalyst was found to be most active for codimerization. Besides dimerization reactions, isomerization was also observed on these catalysts.View full abstract -
Ushio Sakaguchi, Akira Yamasaki, Shizuo Fujiwara1972 Volume 1 Issue 4 Pages 281-286
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSAn approximate equation has been obtained for the pseudocontact shift in tris-chelated europium(III) complexes with C3h, D3h, or C3v symmetry. The crystal field energies have been calculated as a first-order perturbation on the spin-orbit levels.View full abstract -
Teruaki Mukaiyama, Mikio Kuwahara, Toshio Izawa, Masaaki Ueki1972 Volume 1 Issue 4 Pages 287-290
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSBy the treatment of secondary and tertiary benzylic alcohols or tertiary aliphatic alcohols with AgClO4, in benzene at refluxing temperature for 20 to 420 min, olefins were obtained as dehydrated products in good yields. Further, a new procedure for generating tin perchlorate was devised, and the application of this reagent to alkylation reactions of aromatic compounds from alcohols or paraformaldehyde was investigated.View full abstract -
Isao Kuwajima, Yukiko Kurata1972 Volume 1 Issue 4 Pages 291-292
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSIt has been found that the reaction of bis (phenylthlio)methyllithium with various aldehydes, followed by treatment with methyllithium leads to the formation of the corresponding phenylthiomethyl ketones, accompanied with liberation of phenylthiolate anion, in high yields.View full abstract -
Ken-ichi Karakida, Kozo Kuchitsu, Chi Matsumura1972 Volume 1 Issue 4 Pages 293-296
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe microwave spectrum of vanadyl(V) chloride was measured, and the following rotational constants (in MHz) were determined: Bo =1741.72±0.01 for OV35Cl3, Bo =1665.20±0.02 for OV37 Cl3, Ao =1739.94±0.05, Bo =1692.17±0.05, Co =1139±1 for OV35Cl237Cl. From these constants the ro structure was determined: r(V–O)=1.595±0.005 Å, r(V–Cl)=2.131±0.001 Å and ∠(Cl–V–Cl)=111.8±0.2°.View full abstract -
Tadao Shingaki, Masao Inagaki, Noboru Torimoto, Matsuji Takebayashi1972 Volume 1 Issue 4 Pages 297-300
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSEthyl azidoformate was photolyzed in three to six membered cyclic ethers. The α-C–H and α-methyl C–H bonds of cyclic ethers were observed to have unusually large reactivities compared with those of the corresponding C–H bonds of hydrocarbons in the insertion of ethoxycarbonylnitrene. On the anomalous reactivities, a mechanism has been advanced in which an O–N ylide is included as an intermediate of the insertion reaction.View full abstract -
Hachiro Nakanishi, Katsuhiko Ueno, Masaki Hasegawa, Yoshio Sasada1972 Volume 1 Issue 4 Pages 301-304
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe crystal and molecular structure of l,4-bis-(β-pyridyl-(2)-vinyl)-benzene (C20H16N2) was determined. Change of crystal structure on polymerization was investigated by X-ray diffraction method. The polymer obtained is three-dimensionally oriented and the molecular arrangement in the original crystal is preserved in the resultant crystal.View full abstract -
Masamichi Akimoto, Etsuro Echigoya1972 Volume 1 Issue 4 Pages 305-308
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSReactivity of Mo5+ with oxygen which is formed in supported molybdena catalysts was investigated by ESR spectroscopy and discussed as a carrier effect with reference to the selectivity in maleic anhydride formation during vapour phase oxidation of butadiene. Mo5+ formed on SiO2 and TiO2, showed good selectivity and appeared to be the active site for the production of maleic anhydride.View full abstract -
Takamasa Ibaraki, Isao Kusunoki, Kumasaburo Kodera1972 Volume 1 Issue 4 Pages 309-312
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSNO–O chemiluminescence was studied by means of crossed molecular beams. Anomalously bright light emissions have been observed with low temperature NO beams. It is considered that the chemiluminescence is caused by the two-body collisions between NO dimers and O atoms. Radiation cross section is estimated to be about 2×10−15 cm2.View full abstract -
Takayuki Suga, Tsuyoshi Shishibori, Sanae Kimoto1972 Volume 1 Issue 4 Pages 313-314
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSIt was first proved that the 20α-methyl group, as well as the 4β-, 8-, 10-, 14-, and 17-methyls of β-amyrin biosynthesized from [6-D3-mevalonic acid in Pisum sativum are stereospecifically derived from the 3-methyl group of the acid. The result has substantiated the stereospecificity in the enzymatic cyclization of squalene to β-amyrin.View full abstract -
Mitsuru Nakayama, Shûichi Hayashi, Masao Tsukayama, Tokunaru Hor ...1972 Volume 1 Issue 4 Pages 315-316
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESS7,8-Dimethoxy-2,2-dimethylchroman was obtained from pyrogallol trimethyl ether and β, β-dimethylacrylyl chloride via the corresponding chroman-4-one. The Friedel–Crafts reaction of the chroman with acetyl chloride yielded 6-acetyl-7-hydroxy-8-methoxy-2,2-dimethylchroman. The dehydrogenation of the acetylchroman with DDQ in anhydrous benzene afforded ripariochromene A.View full abstract -
Masaki Hasegawa, Yasuzo Suzuki, Nobuyuki Kita1972 Volume 1 Issue 4 Pages 317-320
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESStrans-head-to-head Coumarin dimer cleaves into coumarin in chloroform by irradiation with the light of wavelength 277 nm in high yield. When a ring opened dimer, trans-3,cis-4-bis(2-hydroxyphenyl)-l,trans-2-cyclobutanedicarboxylic acid in aqueous solution is irradiated, a mixture of trans-2,2′-dihydroxystilbene and fumaric acid is obtained in high yield.View full abstract -
Takashi Matsumoto, Yakudo Tachibana, Kenji Fukui1972 Volume 1 Issue 4 Pages 321-324
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESS(±)-Royleanone (I) has been synthesized from 5,7,8-trimethoxy-1-tetralone (III) via (±)-11,12,14-trimethoxypodocarpa-8,11,13-triene (XIII). The synthetic (±)-I was shown to be identical with natural royleanone by their spectral comparisons.View full abstract -
Ikuko Wakeshima, Ichiro Kijima1972 Volume 1 Issue 4 Pages 325-326
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe synthesis of a novel type of stannous compounds was studied. The products are distillable and have high solubilities in organic solvents. The structures of the product were examined by tin analysis, molecular-weight determination, and studies of the IR and NMR spectra.View full abstract -
Yoshiharu Doi, Ichiro Okura, Tominaga Keii1972 Volume 1 Issue 4 Pages 327-329
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe isotacticities of the polypropylenes produced with TiCl3–AlEt3 catalyst without solvent were 6∼7% higher than those obtained in the case with n-heptane solvent. In the case of TiCl3–AlEt2Cl catalyst there was no such a difference due to the presence of the solvent.View full abstract -
Akira Terada, Yoshimasa Toyoshima, Tadasu Yamaji, Kiyoharu Sekine1972 Volume 1 Issue 4 Pages 331-334
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe chemical structure of C20H18O3 (I) which is a crystalline product obtained from the acidic condensation of acetophenone with formaldehyde has been established as 1-benzoyl-4-methylene-5-phenyl-6,8-dioxacyclo[3,2,1]octane. This compound is identical with the product, C20H18O3, isolated by Beets and Heeringa from the Prins reaction of phenylacetylene. The formation mechanism has also been proposed.View full abstract -
Zen-ichi Yoshida, Hideki Miyahara1972 Volume 1 Issue 4 Pages 335-338
Published: April 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSA new worthwhile synthesis of 1,2-diphenylcyclopropene (1) by the dehydrochlorination of cis- and trans-1-chloro-1,2-diphenylcyclopropanes has been found. The isolation of two dimers and ene reactions of 1 have also been described.View full abstract
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