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Volume 38, Issue 7
Displaying 1-7 of 7 articles from this issue
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Sanshiro KOMIYA, Akio YAMAMOTO, Takakazu YAMAMOTO1980 Volume 38 Issue 7 Pages 633-647
Published: July 01, 1980
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSRecent developement of C-H and C-O bonds activation by transition metal complexes is described. In this review, oxidative addition of C-H and C-O bonds toward transition metals accompanied by the bond breakage of these bonds is regarded as an important step of the activation. Application of the oxidative addition of C-H and C-O bonds to organic synthesis is also described.View full abstractDownload PDF (1737K) -
Kenkichi SONOGASHIRA, Shigetoshi TAKAHASHI1980 Volume 38 Issue 7 Pages 648-660
Published: July 01, 1980
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSAcetylenic compounds are valuable intermediates in organic syntheses. Application of organometallic complexes as a reagent or catalyst has developed extensively a variety of new methods of formation and introduction of an acetylenic group into organic structures.
In this article, synthetic methods of acetylene derivatives using organometallic complexes are reviewed according to the following classification based on the type of reactions : 1) substitution reaction 2) addition reaction 3) elimination reaction 4) metathesis and reaction of carbyne metal complexes and 5) use of protecting groups.View full abstractDownload PDF (1359K) -
Minoru TSUTSUI, D. D. Axtell, Kyo TAKAOKA1980 Volume 38 Issue 7 Pages 661-678
Published: July 01, 1980
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe entire field of porphyrin chemistry has undergone rapid and dramatic changes in the last decade. Porphyrins and metalloporphyrins are of interest to disciplines ranging from biochemistry and medicine to industrial catalysts.
Metalloporphyrins have been investigated as possible models for some enzymes. Some of the more important areas of interest include the search for superconductors, semiconductors, improved catalysts for various industrial application, electrocatalysts (e. g. as fuel cell electrodes) and as chemical shift reagents for nuclear magnetic resonance studies.
A variety of technique are available for preparation of both natural and synthetic porphyrins.
Metalloporphyrins is known for virtually every metallic element and new compounds are being prepared continually. While all porphyrins and metalloporphyrins of potential interest are obviously not know, one can state that the preparation of any reasonable porphyrin complex desired should be attainable through these new and powerfull synthetic techniques.View full abstractDownload PDF (2268K) -
Fumio YONEDA1980 Volume 38 Issue 7 Pages 679-692
Published: July 01, 1980
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDiethyl azodicarboxylate (DAD) is a strong hydrogen acceptor and is capable of oxidizing several hydrogen or electron donors to give the corresponding oxidation products. The usefulness of this reagent as an oxidant has been extended to the syntheses of a wide variety of heterocycles. This review summarizes the synthetic application of these DAD-dependent oxidations. Additionally oxidative dealkylation reactions are mentioned.View full abstractDownload PDF (1450K) -
Hisashi ISHII1980 Volume 38 Issue 7 Pages 693-706
Published: July 01, 1980
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSFischer indolization of ο-methoxyphenylhydrazone derivatives provides various types of unexpected indole products under several condition. These abnormal results were well-established. The representative case has been shown by the formation of ethyl 6-chloro- and 6-ethoxyindole-2-carboxylate in treatment of ethyl pyruvate 2-methoxyphenylhydrazone with ethanolic hydrogen chloride. Formation of these products are explainable by cyclization of the starting hydrazone to the orthoposition occupied by a methoxy group. This abnormal Fischer indolization has been developed to a new synthetic method for 6-substituted indole. For example, treatment of 2-methoxyphenylhydrazone with TsOH in the presence of ethyl acetoacetate, an enolizable dicarbonyl compound, gave an indolic product having ethyl acetoacetate group at the C6 position with other indole derivatives. The new reaction was applied to synthesis of two natural indole products having an alkene side chain at the C6 position.
Fischer indolization of other ortho substituted phenylhydrazones have been studied.View full abstractDownload PDF (1742K) -
Yoshikazu ITO1980 Volume 38 Issue 7 Pages 707-712
Published: July 01, 1980
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSPhotopolymer is an attractive functional material and is used as printing plates, photoresists, paints, inks and so on.
In this paper, two photopolymer printing plates developed by Toray Industries, Inc. are described. “TORELIEF” is a polyamide-based photopolymer plate for letterpress printing. Four types of the plate with relief hardness ranging from Shore D 40 to D 80 are introduced.
“TORAY WATERLESS PLATE” is a new positive-working presensitized planographic printing plate which enables offset printing without dampening water.
Toray developed a new principle for planographic imaging based on photo-induced adhesion between a specific silicone rubber layer and a specific photosensitive layer.View full abstractDownload PDF (807K) -
Development and Application of Hydroperoxide ProcessHirohiko NAMBU1980 Volume 38 Issue 7 Pages 713-718
Published: July 01, 1980
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThirty years have elapsed since the initial phenol manufacturing process by the auto-oxidation technology was commercialized in Canada, and today, the annual world-wide production of phenol from cumene has reached approximately 3 million tons.
Subsequently, the technology of the hydroperoxide process was successfully applied to industrial production of such phenols as cresol and hydroquinone in the 1970's. Furthermore, the commercial manufacture of resorcin using the said technology will be realized in Japan in 1980.
Various developments covering the manufacturing process for phenols mentioned above were discussed mainly focussing on the chemical reactions of the respective processes.View full abstractDownload PDF (788K)
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