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Volume 1, Issue 7
Displaying 1-34 of 34 articles from this issue
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Yoshinori Kidani, Shinobu Naga, Hisashi Koike1972 Volume 1 Issue 7 Pages 507-510
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIn order to apply mass spectrometry to metal complex chemistry, the mass spectra of oxinates of divalent metals (Zn, Cu, Ni, Co and Mn) were measured and the fragmentation of oxinates were investigated.
It was found that there are two types of decomposition pathways, and the ionic radii of the metals were found to be related closely to the mass intensity ratio between the molecular ion and the fragment ion of 1 : 1 complex (M·+-144). The stabilities of metal oxinates against electron impact have been considered.View full abstract -
Jiro Yasumura, Ichiro Nakabayashi1972 Volume 1 Issue 7 Pages 511-514
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSOn the basis of several observations of laminated Raney nickel catalysts with an electron microprobe X-ray analyzer, it is concluded that the activity of the catalysts is seemingly correlated to the composition of Raney nickel alloys, and that the active centers are distributed probably at random on the surface of the catalysts.View full abstract -
Mikio Hori, Tadashi Kataoka, Hiroshi Shimizu, Michihiro Miyagaki1972 Volume 1 Issue 7 Pages 515-520
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reactions of 5-substituted dibenzothiophenium salts and 10-arylthioxanthenium salts with organolithiums have been found to yield ring opening products (A), ligand exchange ring opening products (B) and other products, as shown in Tables 1, 2, and 3, respectively. The formation of these compounds supports the assumption of the pseudorotation of pentacoordinated sulfur intermediates in these reactions.View full abstract -
Masanobu Hidai, Tomoji Hikita, Yasuzo Uchida1972 Volume 1 Issue 7 Pages 521-522
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAlkoxides of transition metals, such as Fe, Ti, Nb, and Zr, were found to react with atmospheric carbon dioxide in benzene solution at 30°C. The measurement of CO2 volume absorbed and IR data suggest that transition metal alkoxides are partially carbonated.View full abstract -
Riichiro Nakajima, Tadashi Hara1972 Volume 1 Issue 7 Pages 523-526
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe oxidative coupling of aromatic compounds was carried out between the organic phase containing an aromatic compound and the aqueous phase containing palladium(II) perchlorate-ferric perchlorate system as the catalyst. The yields of biphenyl and bitolyl per hour based on palladium charged were 350 and 1000 percent, respectively.View full abstract -
Masashi Ogawa, Makoto Takagi, Tsutomu Matsuda1972 Volume 1 Issue 7 Pages 527-530
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSEsters of 2,5-cyclohexadienylacetic acid were formed in the reaction of 2,4,6-cyclooctatrien-1-one with alkoxides in alcohols. A ring contraction concerted with a transannular hydrogen transfer to C(4) position from an intermediate hemiacetal was proposed as a plausible pathway on the basis of deuterium distribution in the product.View full abstract -
Seishiro Nakamura, Masuhiko Tamura, Teruo Yasui1972 Volume 1 Issue 7 Pages 531-532
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAcetophenone was obtained selectively accompanied by small amounts of styrene and carbon dioxide in the gas phase oxidation of ethylbenzene with palladium catalyst below 140°C. Acetophenone was postulated to form from the direct oxidation of ethylbenzene since styrene was not oxidized under similar conditions even at higher temperature.View full abstract -
Takayuki Suga, Tsuyoshi Shishibori, Kazuo Kotera, Ritsuko Fujii1972 Volume 1 Issue 7 Pages 533-534
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSArtemisia ketone (1) biosynthesized from [2-14C]mevalonic acid by Artemisia annua L. was found to contain 80% and 13% of the incorporated tracer in the internal and terminal methyls respectively. The unbalance of labelling means that the C5-precursors of two halves of (1) are enzymatically differentiated.View full abstract -
Yuroku Yamamoto, Makoto Kanke, Yaeko Mizukami1972 Volume 1 Issue 7 Pages 535-538
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAntimony(III) is spectrophotometrically determined by reaction between stibine and a mixture of silver diethyldithiocarbamate and o-phenanthroline in chloroform. The red color appears in the chloroform phase, and the color developement may be due to the formation of colloidal silver by reduction with stibine. The method is fairly sensitive and selective.View full abstract -
Kenji Kushi, Hiroyoshi Kanai, Kimio Tarama, Satohiro Yoshida1972 Volume 1 Issue 7 Pages 539-542
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIsomerization and hydrogenation reactions of 1-pentene were catalyzed by zerovalent Pt complex, Pt(Pph3)3, in the presence of SnCl2, oxygen, aldehyde, and [PtH(Pph3)3]X (X=HSO4, NO3, ClO4) under mild conditions.View full abstract -
Norio Koine, Naokazu Sakota, Jinsai Hidak, Yoichi Shimura1972 Volume 1 Issue 7 Pages 543-546
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThree complexes of trans(N)-(ammoniatriacetato)(β-aminocarboxyl-ato)cobaltate(III) containing one or two asymmetric carbon atoms in the β-aminocarboxylato chelate ring were prepared and their circular dichroism spectra were measured. Optical activity of these complexes in the spin-allowed d-d absorption band region mostly arises from the vicinal contributions of the asymmetric carbon atoms.View full abstract -
Takayuki Suga, Toshifumi Hirata, Michiyo Odan1972 Volume 1 Issue 7 Pages 547-550
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new bitter glucoside, named aloenin, isolated from Aloe species has been established to be 2-(carbomethoxymethyliden)-4-(β-D-glucopyranosyloxy)-7-hydroxy-5-methylchromene (1). This is an unique example of naturally occurring chromene having the carbomethoxymethylidene group on C-2.View full abstract -
Makoto Misono, Yukio Yoneda1972 Volume 1 Issue 7 Pages 551-552
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStereochemistry of dehydrobromination of 2-bromobutane over KOH-silica has been determined from the composition and the deuterium content of each butene obtained from erythro-2-bromobutane-3-d1. Below 250°C anti elimination was the preferred mode and syn elimination above 250°C.View full abstract -
Katsuaki Hagio, Hisashi Takei, Teruaki Mukaiyama1972 Volume 1 Issue 7 Pages 553-556
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe cyclic ylides, 4-dimethylsulfuranylidene-2,3-dioxotetrahydrofuran derivatives, were synthesized by the reactions of ethyl (dimethylsulfuranylidene)pyruvate with carbonyl compounds in good yields. The structures of new sulfonium ylides were comfirmed by the spectral data and the elemental analyses.View full abstract -
Teruaki Fujito, Toshiaki Enoki, Hiroaki Ohya-Nishiguchi, Yasuo Deguchi1972 Volume 1 Issue 7 Pages 557-560
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMagnetic susceptibility of organic stable radicals, DPPH and its solvent complexes has been measured. Susceptibility of solvent free DPPH shows a maximum at 11°K and is well fitted to the pair model (δ⁄k=17.64°K). DPPH·BZ has a χmax at 0.65°K but remains constant down to 0.1°K. DPPH·1/4CCl4 has two Weiss-constants: θHigh=−26.0°K and θLow=−0.3°K. Spin concentration of the last complex in low temperature range (below 4.2°K) is a half of that of high temperature range (above 30°K).View full abstract -
Akira Tatehata1972 Volume 1 Issue 7 Pages 561-564
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThree complexes, Δ-,Λ-[Co(phen)2(L-tart)]+, and cis-[Co(phen)2(OH2)(L-tart)]+, have been separated by ion-exchange Sephadex and characterized using the CD data. Two methods, empirical and nonempirical, have been used to assign the absolute configurations.View full abstract -
Shigeo Nishimura, Yoshio Kano1972 Volume 1 Issue 7 Pages 565-568
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe hydrogenation of ethyl 2-methyl-1-cyclohexenyl ether with platinum metal catalysts yields saturated cis-ether with high stereospecificity in ethanol. Formation of the trans-ether during the course of hydrogenation arises through isomerization to ethyl 6-methyl-1-cyclohexenyl ether which yields both cis- and trans-ethers on hydrogenation.View full abstract -
Tatsuro Koike, Yasuo Inoue1972 Volume 1 Issue 7 Pages 569-572
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSKinetics of the non-enzymatic transphosphorylation of several diribonucleotides have been studied. First-order rate constants for the reactions, which are acid-base-catalyzed, have been obtained. Base-sequence and base composition dependent nature of rates is discussed.View full abstract -
Hiroshi Mizutani, Hitoshi Mikuni, Makoto Takahasi1972 Volume 1 Issue 7 Pages 573-576
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe photochemistry of hydrogen cyanide at 184.9 nm was studied. Major reaction products are cyanogen and hydrogen, and minors are methane, ammonia, ethane, hydrazine and methylamine. The addition of hydrogen atoms to hydrogen cyanide is considered for the formation of these products. A reddish brown polymeric substance was also obtained and its IR spectrum is presented.View full abstract -
Goro Tsukamoto, Nobuo Ishikawa1972 Volume 1 Issue 7 Pages 577-580
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPerfluoro-4-methylpentene-2 [1] , an asymmetrical internal perfluoroolefin, reacted with secondary amines such as diethylamine or piperidine to give a terminal enamine [2], which was easily hydrolyzed to the corresponding amide [3]. The reaction mechanism was discussed.View full abstract -
Takashi Matsumoto, Sachihiko Imai, Michio Aizawa, Hidemoto Kitagawa, K ...1972 Volume 1 Issue 7 Pages 581-586
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe oxidation of methyl 7-oxodehydroabietate with perbenzoic acid afforded a mixture of lactone (III), quinone (IV), hydroxyester (V), and hydroxyquinone (VI). The intramolecular cyclization of half acid (VIII) derived from V gave two ketoesters (XI and XII). The structures of XI and XII were assigned on the basis of their chemical and spectroscopic studies, and XII was converted into 11-methoxydehydroabietane (XXXIV).View full abstract -
Kenzo Nagase1972 Volume 1 Issue 7 Pages 587-590
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSData were presented to show that anhydrous potassium trioxalatoaluminate(III), potassium trioxalatovanadate(III) and potassium trioxalatochromate(III) exhibit thermally solid-state transition to hexagonal without any decomposition. The values of enthalpy change were 0.9 and 1.3 kcal/mol for K3[Al(ox)3] and K3[Cr(ox)3], respectively.View full abstract -
Toshihiko Ozawa, Mitsuo Sato, Takao Kwan1972 Volume 1 Issue 7 Pages 591-594
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSESR evidence is presented that the sulfite radical anions can add to methacrylic, crotonic and fumaric acids respectively forming the corresponding secondary radicals. The reactions are compared with those of the sulfate radical anions due to Norman et al., and the difference in the distribution of unpaired electron density of each radical anion is discussed.View full abstract -
Mitsunori Hashimoto, Teruaki Mukaiyama1972 Volume 1 Issue 7 Pages 595-598
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA total synthesis of coenzyme A by utilization of the oxidation-reduction condensation in each important steps is described. Adenosine 2′ ,3′ -cyclic phosphate 5′ -phosphoromorpholidate and pantethine, important intermediates of coenzyme A, were prepared starting from adenosine 2′ (3′-) phosphate and pantothenoic acid in 60% and 80% yields, respectively, mainly by the use of triphenylphosphine and 2,2′ -dipyridyl disulfide as coupling reagents.View full abstract -
Keiichi Fukuyama, Setsuo Kashino, Masao Haisa1972 Volume 1 Issue 7 Pages 599-602
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCrystals of potassium dihydrogen trans-aconitate, C6H5O6K, are monoclinic, a=11.856, b=15.920, c=8.426 Å, β=90.88°, Z=8, and space group C2/c. The structure was solved by the heavy-atom method and refined by block-diagonal least-squares method to R=0.060 for 1677 independent non-zero reflections measured by four-circle diffractometry. There are two types of hydrogen bonds; one is intramolecular (2.53 Å) and the other is intermolecular (2.52 Å). The distances between neighboring double-bonds are longer than 4.96 Å; hence the molecules are too far away to dimerize by ultraviolet light.View full abstract -
Tamotsu Matsumoto, Masanori Sato, Satoshi Hirayama1972 Volume 1 Issue 7 Pages 603-606
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA preliminary electrochemical investigation of 9,10-dichloroanthracene in aprotic solvents was performed at low temperatures as low as −60°C. The generated anion was shown to be stabilized as the temperature decreased. The use of an optical transparent electrode enabled us to obtain a new relationship between absorbance of radical ion and electrode potential.View full abstract -
Shigeo Yoneda, Zen-ichi Yoshida1972 Volume 1 Issue 7 Pages 607-610
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe geometrical and electronic structures of C5H5− and C5H5+ systems have been studied applying CNDO/2 method. The antiaromatic C5H5+ system in the planar structure was found to be much stabilized in three dimensional C4v symmetrical structure.View full abstract -
Yoshihiro Nakagawara, Kiyoshi Kikukawa, Makoto Takagi, Tsutomu Matsuda1972 Volume 1 Issue 7 Pages 611-616
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA variety of π-allylic Pd(II) aminoacetate complexes were synthesized, and their temperature dependent NMR study revealed the presence of diastereoisomers which are in dynamic equilibrium by π-allyl rotation mechanism.View full abstract -
Chiji Yamazaki, Seizo Taira, Tomoko Okawa1972 Volume 1 Issue 7 Pages 617-620
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCondensation of an aromatic aldehyde or ketone S-methyl-, allyl-, or benzylisothiosemicarbazone with acetonyl or a phenacyl bromide yielded 1-arylideneamino-2-methylthio-, allylthio-, or benzylthio-4-aryl- or methyl-imidazoles in moderate yields. Treatment of these imidazoles with zinc/acetic acid in the presence of acetic anhydride afforded 1-acetyl-4-substituted imidazoles. Hydrolysis of the arylideneamino linkage succeeded only with the α-methyl-p-methoxybenzylideneamino compound.View full abstract -
Fumio Toda1972 Volume 1 Issue 7 Pages 621-624
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe title butatriafulvalenedione (V) was prepared by the condensation of diphenylmethylenecyclobutane-1,3-dione (IV) with diphenylcyclopropenone. The spectral data of V were discussed. V was dissolved in methanolic potassium hydroxide in the form of the enolate anion (VI), and the acidification of the solution recovered V.View full abstract -
Ichiro Murata, Yoshikazu Sugihara1972 Volume 1 Issue 7 Pages 625-628
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotolysis of 3,4:6,7-dibenzobicyclo[3.2.2]nona-3,6,8-trien-2-one (3) afforded exclusively 3,4-benzo-4a,9a-dihydrofluorenone (5) by way of [1,3]-acyl migration. Compound (4), exomethylene counterpart of the ketone (3), was regiospecifically isomerized to (7) by both the direct and sensitized irradiations.View full abstract -
Kazuaki Isomura, Masato Okada, Hiroshi Taniguchi1972 Volume 1 Issue 7 Pages 629-632
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe photolysis and the thermolysis of the title compounds (I) were studied. The photolysis of (I) at low temperature gave 3-alkenyl-1-azirine (II) but at room temperature gave (II), pyrrole (III) or butenonitrile (IV) depending on the nature of the substituents of (I). The thermolysis of (I) gave (III), (IV) or 2H-pyrrole (V).View full abstract -
Juro Ojima, Tadayoshi Yokomachi, Tai Yokoyama1972 Volume 1 Issue 7 Pages 633-636
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA convenient synthesis of o-ethynylbenzaldehyde (VIII) has been developed. An approach to dibenzo[18]annulene from VIII has also been described.View full abstract -
Yoshihiko Moriyama, Toshichika Sato, Hajime Nagano, Yoshiaki Tanahashi ...1972 Volume 1 Issue 7 Pages 637-640
Published: July 05, 1972
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA new sesquiterpene isolated from Ligularia Fischeri Turcz. (collected at Hakusan) has been shown to be 1β,10β-epoxyfuranoeremophilan- 6β-ol(I).View full abstract
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