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Volume 41, Issue 4
Displaying 1-9 of 9 articles from this issue
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From the Recent StudiesYoshiro OGATA1983 Volume 41 Issue 4 Pages 305-315
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe oxidation of organic compounds is not only a main source of available energy, but includes very important reactions for us concerning industrial chemistry, biology, medical science, and also environmental conservation, so that the studies on the oxidation reactions have been widely carried out from the early date of chemistry and still many active chemists are centering their interest on this reaction.
The present article reviews valuable and interesting studies reported in recent years on the organic oxidation with chemical oxidants beside molecular oxygen including studies carried out in our laboratory. The oxidation with molecular oxygen would be described by other authors in this symposium. Because of the limited pages we excluded electrolytic and biological oxidations and oxidations by organic compounds.
The present review is classified according to the oxidants as follows : heavy metal salts (Cr, Mn, Os, Xe, Co, Pd, Tl, Ru, and U salts), halogens and hypohalites (dark and photochemical reactions), hydrogen peroxide (under irradiation, base-catalyzed and heavy metal-catalyzed reactions), and miscellaneous peroxides (perphosphoric acid, peroxidiphosphate, alkyl hydroperoxides, and oxaziridines).View full abstractDownload PDF (1169K) -
Yoshihiko MORO-OKA, Hiroharu SUZUKI1983 Volume 41 Issue 4 Pages 316-325
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDioxygen complexes of palladium and rhodium having olefinic ligand are prepared by the anion exchange reaction of the corresponding metal complexes using superoxide ion as a dioxygen source. Transfer of the dioxygen ligand to the coordinated olefin is observed in pyrolysis of a rhodium complex having COD ligand. Preparation and characterization of a rhodium hydroperoxo complex is also described.View full abstractDownload PDF (1163K) -
Isao SAITO, Koji SHIMOZONO1983 Volume 41 Issue 4 Pages 326-336
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSRecent studies on the photochemical oxidations of organic compounds have been reviewed. The examples include, i) trapping reactions of biradicals and carbenes with oxygen, ii) photoepoxidation of olefins with α-diketones, iii) electron transfer-initiated photooxidations, and iv) semiconductor-sensitized photooxidation. The utility of these reactions as a tool for oxyfunctionalization of organic molecules is emphasized. Singlet oxygen reactions are not included in this review.View full abstractDownload PDF (1096K) -
Koichiro OSHIMA1983 Volume 41 Issue 4 Pages 337-347
Published: April 01, 1983
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSStereo- and chemoselective oxidation reactions of olefins and alcohols promoted by transition metal catalyst are described. Topics in oxidation of olefins are (1) stereoselective epoxidation of allylic alcohols, (2) cis hydroxylation and oxyamination catalyzed by OsO4, and (3) allylic oxidation. A couple of chemoselective oxidations of alcohols are recently developed. These involve (1) selective oxidation of secondary alcohols in the presence of primary ones, (2) selective oxidation of primary hydroxyls in preference to secondary ones, and (3) oxidation of allylic alcohols to α, β-unsaturated carbonyl compounds.View full abstractDownload PDF (1480K) -
Eiichi YOSHII, Kei TAKEDA1983 Volume 41 Issue 4 Pages 348-358
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSRecent progress in the total syntheses of naturally occurring di- and tricyclopentanoid sesquiterpenes is reviewed, placing particular emphasis on the methodology for the construction of the skeletons and further on the total synthesis of quadrone.View full abstractDownload PDF (1031K) -
Tamon OKANO, Toshikatsu YOSHIDA1983 Volume 41 Issue 4 Pages 359-364
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThree types of Rh (I) hydridotrialkylphosphine compounds, trans-RhH(N2) L2(L=P(t-Bu)3, PPh(t-Bu)2, PCy3, P(i-Pr)3), Rh2H2(μ-N2)L4(L=PCy3, P(i-Pr)3), and RhHLn(n=3, L=P (i-Pr)3, PEt3 ; n=4, L=PEt3), were prepared by reducing RhCl3·3 H2O with Na/Hg in THF. They were proved to be extremely strong nucleophiles and serve as efficient catalysts for hydrogenation of nitriles, ketones, and alkynes, and H-D exchange reaction of H2 and H-C(sp2, sp3)bond with D20 through activation of H2 and water, respectively. They also catalyze the hydrogenation of carbonyl and nitro compounds with H2O-CO and the hydroformylation of olefins with formaldehyde.View full abstractDownload PDF (630K) -
Yuichi IIKUBO1983 Volume 41 Issue 4 Pages 365-368
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSOrganic fluorine comounds are widely used for working fluid in industry. Applications and practical examples are described in regard of trichlorofluoromethane (F-11), 1, 2-dichlorotetrafluoroethane (F-114), 1, 1, 2 -trichlorotrifluoroethane (F-113), 2, 2, 2-trifluoroethanol (CF3CH2OH), bromotrifluoromethane (CF3Br), trifluoromethane (F-23) and dichlorodifluoromethane (F-12).View full abstractDownload PDF (520K) -
Noboru IZUMOZAKI1983 Volume 41 Issue 4 Pages 369-370
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (207K) -
Hidehiko KOBAYASHI1983 Volume 41 Issue 4 Pages 371-372
Published: April 01, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (168K)
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