Journal of Synthetic Organic Chemistry, Japan
Online ISSN : 1883-6526
Print ISSN : 0037-9980
ISSN-L : 0037-9980
Search
Advanced search
OR
Browse
Search
Volume 40, Issue 4
Displaying 1-10 of 10 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Recent Advances in the Syntheses of Vitamin E, Ubiquinones, and Vitamin K
    Shigetoshi YAMADA, Toru TAKESHITA, Juntaro TANAKA
    1982 Volume 40 Issue 4 Pages 268-284
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.268
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Phenols, quinones, chromans, and chromens which have polyprenyl units as the side chains in aromatic compounds, are widely distributed in the natural products and many of these compounds are known as biologically active compounds. This review deals with recent advances in the syntheses of Vitamin E (α-tocopherol and α-tocotrienol), Ubiquinones (Coenzyme Q) and Vitamin K (K1 and K2).
    View full abstract
    Download PDF (1547K)
  • Recent Advances in Isocyanate Chemistry
    Shoichiro OZAKI
    1982 Volume 40 Issue 4 Pages 285-295
    Published: April 01, 1982
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.285
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    New isocyanates, new synthetic methods of isocyanates, new reactions of isocyanates and industrial applications of isocyanates are reviewed, based on primary journals and Chemical Titles published in recent 10 years.
    View full abstract
    Download PDF (959K)
  • Total Synthesis of Maytansine
    Hidetsura CHO
    1982 Volume 40 Issue 4 Pages 296-306
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.296
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Maytansine, an extraordinary antitumor agent, was stereoselectively synthesized in 1980 by Corey group. The remarkable strategy, the new reagents and reactions of the total synthesis are explained in detail here. Also, the syntheses of maytansinoids by Meyers group are briefly mentioned.
    View full abstract
    Download PDF (1356K)
  • Quinone Bisacetals and Monoacetals
    Useful Synthetic Intermediates
    Shinsaku FUJITA
    1982 Volume 40 Issue 4 Pages 307-320
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.307
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Preparative methods (P), reactions (R), and synthetic applications (S) of quinone bisacetals (I) and monoacetals (II) are reviewed. P-I : (1) electrochemical methods (anodic oxidations) and (2) organochemical methods ; : (1) hydrolysis, (2) hydrogenations, (3) reactions with nucleophiles, and (4) reactions of lithio derivatives of I ; and S-I : (1) isoprenoid quinones and (2) anthracyclinones. P-II : (1) electrochemical methods, (2) organochemical oxidation of p-alkoxyphenols, (3) partial hydrolysis of quinone bisacetals, and (3) hydrolysis of the monoacetals of p-quinone monosulfonimides or nucleophilic reactions of o-quinone monosulfonimides ; R-II : (1) nucleophilic additions, (2) 1, 4-additions of carbanions, and (3) reductions ; and S-II : (1) bishomoquinone and triasteranetrione, (2) tropolones, (3) neolignans, (4) cherylline, (5) anthracyclinones, (6) gymnomitrol, (7) asatone, (8) ryanodol, and (9) α-tocopherol.
    View full abstract
    Download PDF (1318K)
  • Intermolecular Asymmetric Diels-Alder Reactions
    Yuji MORI
    1982 Volume 40 Issue 4 Pages 321-331
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.321
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This article describes the asymmetric inductions in the intermolecular asymmetric Diels-Alder reactions. The reactions are classified into three groups :
    1. Reactions of chiral dienophiles with dienes.
    2. Reactions of chiral dienes with dienophiles.
    3. Reactions catalyzed by chiral catalysts.
    The relationships between the absolute configuration of the chiral reagents and that of the products is discussed.
    View full abstract
    Download PDF (1189K)
  • The Metal Effect on the Stereoselection in Acyclic Systems
    The Reaction of Allylic Organometallic Compounds and Metal Enolates
    Yoshinori YAMAMOTO, Kazuhiro MARUYAMA
    1982 Volume 40 Issue 4 Pages 332-342
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.332
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The currently available methods via allylic organometallic compounds for the stereoselective synthesis of homoallyl alcohols are summarized. Usually, Z-allylic organometallics give erythro adducts upon treatment with aldehydes, while E-derivatives afford threo products. Interestingly, allylic stannanes react with aldehydes in the presence of BF3·OEt2 to give erythro products regardless of the geometry of the double bond. A short and stereoselective synthesis of the Prelog-Djerassi lactone is realized via this method. The metal effect on the stereoselection of enolate reaction is also summarized. Zirconium and tin enolates give erythro aldols irrespective of the enolate geometry. α-Mercurioketones undergo a. rapid reaction with aldehydes in the presence of BF3·OEt2 to give the kinetic erythro aldols. These erythro selections are explained by the acyclic mechanism.
    View full abstract
    Download PDF (1228K)
  • Recent Situation and Future Aspects of Agricultural Chemicals in Japan
    Noboru SHINDO
    1982 Volume 40 Issue 4 Pages 343-351
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.343
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Agricultural chemicals industries in Japan have developed remarkably in recent years. Therefore the author thinks it necessary to write an up-to-date review concerning the agricultural chemicals industry. This review contains several items as follows : Feature of pesticide chemicals. Production amounts of pesticides. Import and exports of pesticides. Diminishing of toxic pesticides. Development of mixture of pesticides. Overseas affiliates of Japan pesticide companies. Present situation of pesticides industries. Major manufactures and their production of pesticides. Future aspects. New chemicals. Mutural relationship of companies.
    The author wrote this review with many useful tables written in English. In conclusion, safer and more effective pesticides in future should be developed as soon as possible to cope with worsening world-wide food crisis.
    View full abstract
    Download PDF (1046K)
  • Synthesis of O-4-tert-Butylcyclohexyl S-Methyl Dithiocarbonates
    Kunio FUJII, Hirotoshi TAMURA, Yoshiro KINOSHITA
    1982 Volume 40 Issue 4 Pages 352-353
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.352
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Both isomers of O-4-tert-butylcyclohexyl S-methyl dithiocarbon ates were synthesized in pure form from corresponding 4-tert-butylcyclohexanol via alkoxides. The cis alkoxide was prepared from cis alcohol and dimsyl sodium in DMSO, while the trans isomer was obtained by the equilibration of the alcohol mixture.
    View full abstract
    Download PDF (254K)
  • Sodium borohydride (NaBH4)
    Shingo HAYASI
    1982 Volume 40 Issue 4 Pages 354
    Published: April 01, 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.354
    JOURNAL FREE ACCESS
    Download PDF (133K)
  • Erratum to : Anthracycline Antibiotics
    1982 Volume 40 Issue 4 Pages 366
    Published: 1982
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.5059/yukigoseikyokaishi.40.4_366
    JOURNAL FREE ACCESS
    Download PDF (144K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top