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Volume 40, Issue 3
Displaying 1-8 of 8 articles from this issue
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Shinsaku FUJITA1982 Volume 40 Issue 3 Pages 176-187
Published: March 01, 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSImage-providing compounds for instant color photography are classified as positive- or negative-working according to their photographic functions, and as dye-releasing or- stopping to their image-providing mechanisms. Their characteristics and properties as functionalized dyes are discussed briefly. Several synthetic approaches to the compounds selected, e. g., dye developers, p-sulfonamidonaphthol and o-sulfonamidophenol dye-releasers, are reviewed.View full abstractDownload PDF (1346K) -
Shunzo FUKATSU1982 Volume 40 Issue 3 Pages 188-196
Published: March 01, 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSOn the basis of the mechanism of aminoglycoside antibiotic resistance, a number of semisynthetic derivatives of aminoglycoside antibiotics have been synthesized by deoxygenation and acylation. Among them, 3', 4'-dideoxykanamycin B (Dibekacin) and 1-N- [(S) -4-amino-2-hydroxybutyryl] kanamycin A (Amikacin) have been commercialized and now widely used clinically. Dibekacin is demonstrated by our improvement on the industrial synthesis and Amikacin is reviewed from the view point of methodology of the selective acylation.View full abstractDownload PDF (944K) -
Approach to Selective Functionalization of IsoprenoidsKenji UNEYAMA, Sigeru TORII1982 Volume 40 Issue 3 Pages 197-208
Published: March 01, 1982
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSThis article describes the selective functionalizations of polyisoprenoids by mediator-promoted indirect electrochemical oxidation along with a review of a recent progress in this field. The newly developed electrochemical techniques offer the highly selective epoxidation, chlorinative enetype reaction, and oxyselenenylation-deselenenylati on of polyisoprenoids.View full abstractDownload PDF (1264K) -
Iwao OJIMA, Naoto HATANAKA1982 Volume 40 Issue 3 Pages 209-217
Published: March 01, 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSNew method is developed for the synthesis of α-amino acids, α-hydroxy acids and dipeptides by means of the regioselective cleavage of 4-aryl-β-lactams on palladium catalyst with molecular hydrogen. The method is applicable to oligopeptide synthesis via mono-, bis- and poly-β-lactam intermediates. Leucine-enkephalin derivatives which are known as opioid peptide hormone, are successfully synthesized. Highly effective asymmetric synthesis of bis-β-lactams, which further give tripeptides, is also described. Scope and limitation of the method is discussed.View full abstractDownload PDF (1124K) -
Yasuo YAMAZAKI, Akio MASUDA1982 Volume 40 Issue 3 Pages 218-226
Published: March 01, 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSCarbonylations of benzyl alcohol and its related compounds are introduced from synthetical and mechanistic viewpoints in conformity with the authors' investigation. Benzyl alcohol is easily carbonylated to form phenylacetic acid in the presence of rhodium chloride and methyl iodide, and the introduction of an electrodonating group into phenyl ring of the alcohol accelerates the reaction. A mechanistic discussion of the reaction is evolved with reference to the oxidative addition of benzylic halides to palladium complexes. In the reaction of benzyl acetate catalyzed by rhodium chloride and methyl iodide phenylacetic acid is unexpectedly formed as the main product, and a mechanistic proposal for the phenonenon is drawn.View full abstractDownload PDF (966K) -
Isao KARUBE, Shuichi SUZUKI1982 Volume 40 Issue 3 Pages 227-233
Published: March 01, 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSVarious biosensors using immobilized biocatalysts such as enzymes, organelles, and microorganisms and electrochemical devices have been developed for the determination of organic compounds. Enzyme sensors consisted of immobilized enzymes and electrochemical devices. These enzyme sensors were applied to the determination of glucose, ethanol, pyruvate, amino acids, urea and so on. Some of them were commercially available and applied to clinical and food analyses. On the other hand, microbial sensors consisted of immobilized microorganisms and electrochemical devices have been developed by the authors. Microbial sensors are stable for a long time. Therefore, microbial sensors were applied to fermentation process and environmental analyses. The microbial sensors are classified into two types. The microbial sensors based on the amperometric determination of respiration activity were applied to the determination of glucose, acetic acid, ethanol, ammonia, methane, BOD (biochemical oxygen demand), and so on. The microbial sensors based on the potentiometric or amperometric determination of electroactive metabolite produced by microorganisms were also applied to the determination of glutamic acid, vitamines, cephalosporin and so on. Furthermore, immuno and enzyme immuno sensors are also described in the review.View full abstractDownload PDF (935K) -
Yoshiki KATSUYAMA1982 Volume 40 Issue 3 Pages 234-237
Published: March 01, 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (487K) -
1982 Volume 40 Issue 3 Pages 266
Published: 1982
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (144K)
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