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Volume 5, Issue 1
Displaying 1-30 of 30 articles from this issue
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Hirokatsu Akagi, Yuzaburo Fujita, Eigo Takabatake1976 Volume 5 Issue 1 Pages 1-4
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPhotochemical solubilization and methylation of mercuric sulfide have been studied in aqueous acetic acid solutions. Mercuric sulfide was solubilized gradually and almost completely after three weeks by irradiation with the light of a blacklight lamp. The measurements of methylmercury photo-produced in the aqueous system demonstrated that the rate of the production of methylmercury was in good agreement with that of the photo-solubilization of mercuric sulfide.View full abstract -
Alain Croisy, Adolfo Ricci, Miroslava Jancevska, Pierre Jacquignon, Da ...1976 Volume 5 Issue 1 Pages 5-10
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe thiopyranone-3 has been condensed with arylhydrazines, orthoamino acetophenone and orthoamino benzaldehyde to give some new indoles and quinolines.
The Bthoxycarbonyl-2 derivative has given some pyrazolones. RMN and Mass Spectra are examinated.View full abstract -
Akio Baba, Yoshiki Ohshiro, Toshio Agawa1976 Volume 5 Issue 1 Pages 11-12
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reactions of diphenylcyclopropenone with N-sulfinylanilines in the presence of nickel tetracarbonyl gave pyrrolines, 1,3,4-triphenylpyrroline-2,5-dione (IIIa) and 1-p-tolyl-3,4-diphenylpyrroline-2,5-dione (IIIb). In these reactions, exchanges of C=O for S=O were observed. On the other hand, the reaction with N-sulfinylcyclohexylamine gave a 1:1 cycloadduct, 2-cyclohexyl-4,5-diphenyl-3-isothiazolone-1-oxide (IVc) in 36% yield without an exchange.View full abstract -
Teruaki Mukaiyama, Haruhiko Toda, Susumu Kobayashi1976 Volume 5 Issue 1 Pages 13-14
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe equimolar reactions of carboxylic acids and alcohols with 1-methyl-2-fluoro or -2-chloropyridinium salt in the presence of a betaine, (3,4-dihydro-2H-pyrido[1,2-a]pyrimidin-2-one(I)), afforded the corresponding carboxylic esters in good yields.View full abstract -
Hirofumi Takahashi, Yoshinao Oosawa, Akiko Kobayashi, Taro Saito, Yuki ...1976 Volume 5 Issue 1 Pages 15-16
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSX-ray structure analysis of dichloro(benzoylmethylenediphenyl-2-diphenylphosphinoethylphosphorane)palladium indicates that the ylide carbon, the phosphine phosphorus and two chlorine atoms coordinate to palladium forming a square planar configuration.View full abstract -
Masaaki Iwata, Hiroyoshi Kuzuhara, Sakae Emoto1976 Volume 5 Issue 1 Pages 17-18
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS2′-Acetoxy-3-acetyl-4′,5′-O-isopropylidenepyridoxine (I) was specifically converted to 2′-acetoxy-4′-acetylpyridoxine (III) in acetone in the presence of metal ions such as zinc, copper(II), iron(III), and aluminium in varying degree. Of these catalysts ferric ion was the most effective to complete the migration reaction. In the other pyridoxine analogues, no migration reaction was induced by these catalysts.View full abstract -
Hiroshi Takaku, Yoshifusa Shimada, Yoshiaki Morita, Tsujiaki Hata1976 Volume 5 Issue 1 Pages 19-22
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSO-Ethyl S-benzoyldithiocarbonate was found to be a useful reagent for benzoylation of the 4-amino groups of cytidine 5′-phosphate and deoxycytidine 5′-phosphate. By use of the reagent, N4-benzoylcytidine and N4-benzoyldeoxycytidine were also obtained in high yields.View full abstract -
Masao Kiyama, Kenso Murakami, Toshio Takada, Izuru Sugano, Toshiro Tsu ...1976 Volume 5 Issue 1 Pages 23-28
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSSuspensions prepared by mixing solutions of NaOH and PbCl2 in various mol ratios were subjected to aging at 25, 50 and 80°C. Formation of three kinds of basic lead chlorides takes place, depending mainly on the pH. Their solubilities in the suspension media with various pH values at 25°C were determined.View full abstract -
Shunichiro Suzuki, Yoshihiko Moro-Oka, Tsuneo Ikawa1976 Volume 5 Issue 1 Pages 29-32
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAutoxidation of cyclohexene catalyzed by insoluble bismuth sulfate in acidic solvents gave 1-cyclopentene-1-carboxaldehyde selectively. A new mechanism for the autoxidation involving isomerization of peroxyradical catalyzed by acidic site was presented.View full abstract -
Isao Kamiya, Takashi Sugimoto1976 Volume 5 Issue 1 Pages 33-36
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSUsing the indirect chemiluminescence technique, we have obtained evidences for the proposal that excited triplet acetone and benzoic acid were generated in the air oxidation of 3-methyl-2-butanone and benzoin respectively in alkaline aprotic solvents. On the other hand, it seemed that excited singlet benzaldehyde was generated from β-phenylpyruvic acid.View full abstract -
Yasutaka Tanaka, Hideshi Hattori, Kozo Tanabe1976 Volume 5 Issue 1 Pages 37-38
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESS1,3-Butadiene was selectively hydrogenated to butenes without further hydrogenation to butane over MgO, CaO, SrO, and BaO. The oxides showed their maximum activity when evacuated around 800–1000°C, and the maximum activity increased in the order of BeO<<BaO<MgO<SrO<CaO.View full abstract -
Osamu Ito, Masahiro Hatano1976 Volume 5 Issue 1 Pages 39-42
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe radical anions of 1,1′-binaphthyl and 9,10-dihydro-3,4;5,6-dibenzophenanthrene racemize more rapidly than the corresponding neutral compounds without cleavage of the 1,1′ bond.View full abstract -
Warren D. Woessner1976 Volume 5 Issue 1 Pages 43-46
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA facile synthesis of esters via nucleophilic reaction of the lithiated orthothioester (I) with halides, aldehydes, and ketones is described. The resultant substituted orthothioesters (III) are hydrolyzed to esters with mercuric salts in the presence of aqueous alcohol in high yield.View full abstract -
Masaaki Kakimoto, Shoji Kajigaeshi, Shuji Kanemasa1976 Volume 5 Issue 1 Pages 47-48
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSAziridinone reacted with phenyl isocyanate to give two isomers of imidazolidine-2,4-dione which correspond to the cycloadducts of aziridinone to phenyl isocyanate.View full abstract -
Teruaki Mukaiyama, Masahiro Usui, Kazuhiko Saigo1976 Volume 5 Issue 1 Pages 49-50
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSDirect lactonization of ω-hydroxy acids, HO(CH22)nCOOH with n=5, 7, 10, 11, 14, has been successfully carried out under mild conditions in good yields by the treatment with 1-methyl-2-chloropyridinium iodide in the presence of triethylamine. In the case of the acid with n=6, only lactide has been produced.View full abstract -
Masao Kato, Hiroshi Urabe, Yoshinao Oosawa, Taro Saito, Yukiyoshi Sasa ...1976 Volume 5 Issue 1 Pages 51-52
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCationic complexes of bidentate phosphorus ylide ligands, benzoylmethylenediphenyl-2-diphenylphosphinoethylphosphorane(BDEP) and benzoylmethylenediphenyldiphenylphosphinomethylphosphorane (BDMP) [MCl(L)PR3]+BPh4− and neutral complexes MX2(L) (M = Pd or Pt ; L = BDEP or BDMP ; R = Ph or Cy ; X = Br, I, or SCN) have been synthesized and characterized.View full abstract -
Seichi Okeya, Shinichi Kawaguchi, Noritake Yasuoka, Yasushi Kai, Nobut ...1976 Volume 5 Issue 1 Pages 53-56
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reaction of sodium tetrachloropalladate(II) with ethyl acetoacetate in aqueous alkaline solution afforded a key intermediate Pd(C6H9O3)2·\frac12H2O [1]. The compound 1 reacts with a base L such as pyridine, 2-methylpyridine, n-butylamine, benzylamine, or 2,2′-bipyridine, resulting in Pd(1-ethoxycarbonylacetonato-c1)2L2 [2]. The central-carbon-bonding of ethyl acetoacetate to palladium has been deduced from the IR and NMR spectra, and finally ascertained by the X-ray analysis of a compound with 2-methylpyridine as L.View full abstract -
Teruaki Mukaiyama, Yukiko Aikawa, Susumu Kobayashi1976 Volume 5 Issue 1 Pages 57-60
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe equimolar reactions of carboxylic acids and amines with 1-methyl-2-fluoro or 2-chloropyridinium salt by the successive use of 1 mol of tri-n-butylamine and the betaine, (3,4-dihydro-2H-pyrido[1,2-a]pyrimidin-2-one (I)), afforded the corresponding carboxamides in good yields.View full abstract -
Shinkiti Koto, Naohiko Morishima, Shonosuke Zen1976 Volume 5 Issue 1 Pages 61-64
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSA system of dichlorodiphenylsilane - silver sulfonate has been found to be of use for the direct glucosidation of 2,3,4,6-tetra-O-benzyl-α-D-glucopyranose. Efficient synthesis of trehaloses with the system is described.View full abstract -
Sada-aki Yamamoto, Koichi Kikuchi, Hiroshi Kokubun1976 Volume 5 Issue 1 Pages 65-68
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe transient absorption spectra were observed for 2-naphthol and 1-anthrol in pyridine upon sensitization by suitable triplet energy donors. No transient was produced by direct excitation. The intersystem crossing process is not the deactivation pathway of the singlet excited species hydrogen bonded with pyridine.View full abstract -
Makoto Misono, Makoto Ishikawa, Yukio Yoneda1976 Volume 5 Issue 1 Pages 69-72
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSStereospecific substitution reaction of halogens with retention of configuration was found in the reaction of 2,3-dibromobutanes over metal halides at 100–200°C, although rapid racemization of optically active 2,3-dibromobutane took place. A reaction mechanism which involves a bridged bromonium-ion intermediate was proposed to explain these results and the regioselectivity of the substitution of 1,2-dibromopropane.View full abstract -
Keizo Naya, Yasushi Miyoshi, Hideo Mori, Kunihiro Takai, Mikihiko Naka ...1976 Volume 5 Issue 1 Pages 73-76
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSTwelve sesquiterpenes including six new compounds have been isolated from Cacalia delphiniifolia Sieb. et Zucc. and C. hastata L. var. tanakae (Franch. et Savat.) Kitam., and their structures have also been determined by their physical and chemical properties.View full abstract -
Takeshi Sotobayashi, Toshio Suzuki, Kohji Yamada1976 Volume 5 Issue 1 Pages 77-80
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSPolyethyleneglycol and its derivatives were found to be employed as new extracting reagents of trace amounts of Co(II) in liquid–liquid extraction. The extraction behavior of Co(II) with polyethyleneglycol alkylphenyl ether (Triton X-100) from thiocyanate solutions was studied, and the extracted chemical species was estimated to be (NH4)2Co(NCS)4(Triton X-100))2.View full abstract -
Seizo Tamagaki, Isao Hatanaka, Katsuyuki Tamura1976 Volume 5 Issue 1 Pages 81-84
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe reactions of dibenzylselenonium dicyanomethylide or cyanomethoxycarbonylmethylide with triphenylphosphine at room temperature gave 2-benzyl-2-cyano-3-phenylpropanenitrile or methyl 2-benzyl-2-cyano-3-phenylpropanoate by deselenization and the addition of acetic acid into the reaction system changed the reaction mode, yielding mainly dibenzyl diselenide. Meanwhile, the corresponding selenonium imide and selenoxide afforded dibenzyl selenide.View full abstract -
Takao Ikariya, Akio Yamamoto1976 Volume 5 Issue 1 Pages 85-88
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe complexes I-IV, CoR2(acac)(PR′3)2 (R=Me, Et, n-Pr, iso-Bu; PR′3=PEt3,P(n-Bu)3,PPhMe2,PPh2Me) have been prepared by the reactions of Co(acac)3, AlR2(OEt) and tertiary phosphines in ether. These complexes were characterized by NMR, IR spectroscopy and the chemical reactions. H-D scrambling in ethyl groups of Co(CH2CD3)2(acac)(PPhMe2)2 (V) has been observed.View full abstract -
Satoshi Inagaki, Tsutomu Minato, Hiroshi Fujimoto, Kenichi Fukui1976 Volume 5 Issue 1 Pages 89-92
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSThe symmetry-imposed stereoselection rule is partially modified on the basis of orbital interaction. The modification is required for multi-cyclic interactions. The mechanisms of “symmetry-forbidden” 1,3-migration in bisallylic compounds were discussed successfully.View full abstract -
Ilhyong Ryu, Shinji Murai, Shoji Otani, Noboru Sonoda1976 Volume 5 Issue 1 Pages 93-94
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSCyclopropyl esters are conveniently prepared by direct addition of acid halides to the reaction mixture of Simmons–Smith reagent and silyl enol ethers. In this reaction, zinc iodide, a by-product of the Simmons–Smith reaction, operates as a Friedel–Crafts-type catalyst to activate acid halides.View full abstract -
Teruaki Mukaiyama, Toshio Sato, Seiji Suzuki, Tan Inoue, Hideo Nakamur ...1976 Volume 5 Issue 1 Pages 95-98
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSα-Substituted-β-keto acid 2,2,2-trichloroethyl esters reacted with aldehydes regiospecifically at α-carbon to the ester carbonyl in the presence of Zn to give the corresponding aldols in good yields.View full abstract -
Ken-ichi Okamoto, Akira Itaya, Shigekazu Kusabayashi1976 Volume 5 Issue 1 Pages 99-102
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSMagnetic fields were found to increase the prompt exciplex fluorescences in intensity in poly-N-vinylcarbazole films doped with dimethylterephthalate and N,N,N;N′-tetramethyl-p-phenylenediamine by up to 2 % at 500 G. This effect was independent of the intensity and the wavelength of the exciting light, the emission-wavelength, and applied electric fields, although slightly dependent on temperature. This effect was not observed for the exciplex fluorescences in solution.View full abstract -
Takehiko Nishio, Yoshimori Omote1976 Volume 5 Issue 1 Pages 103-104
Published: January 05, 1976
Released on J-STAGE: March 27, 2006
JOURNAL FREE ACCESSIrradiation of 1-phenyl-2-propyn-1-one (1) in various alcohols afforded 2-alkyl-5-phenyl furans (2a–d) via cyclization of the intermediate (4), 1:1-addition product of (1) and each alcohol.View full abstract
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