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Joint Research on Chemistry of Hypervalent Compounds

Research Project

Project/Area Number 06044168
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionKurume National College of Technology

Principal Investigator

TANIGUCHI Hiroshi  Kurume National College of Technology, 校長 (10037715)

Co-Investigator(Kenkyū-buntansha) TIDWELL Thomas t.  University of Toronto, 化学科, 教授
STANG Peter j.  University of Utah, 化学科, 教授
KITAMURA Tsugio  Kyushu University, 工学部, 助教授 (00153122)
Project Period (FY) 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1994: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsHypervalent Compound / Hypervalent Iodine Reagent / Iodonium Salt / Benzothiophenium Salt / Liquid-crystalline Diacetylene / Benzyne Precursor
Research Abstract

The research on hypervalent compounds is the one of the most important fields of organic chemistry. This research was conducted to aim at clarifying the roles of hypervalent compounds in organic reactions, especially, to develope new reactive hypervalent reagents and the synthetic reactions using the reagents.
1.Development of Hypervalent Reagents
Synthesis of highly reactive hypervalent iodine reagents were conducted. The p-phenylene type of bisiodine (III) reagents was prepared from iodosylbenzene (PhIO) and trifluoromethanesulfonic acid (TfOH). Double the molar amounts of TfOH were essential to produce the p-phenylene reagent. Iodobenzenediacetate was converted by using 2 equiv of TFOH to a highly reactive iodine reagent. Also, o-iodosylbenzoic acid provided a highly reactive iodine reagent. These hypervalent iodine reagents showed a high reactivity to aromatic and acetylenic substrates to give aryl and alkynyliodoniumu salts in high yields.
2.High Reactivity of Hypervalent Iodine Compounds
The high reactivity of the hypervalent iodine reagents was attributed to the high nucleofugacity of triflate group attached with iodine. The electron withdrawing groups on the aromatic ring increased the reactivity. The high reactivity of hypervalent compounds toward nucleophiles was derived from the high leaving ability of the phenyliodonio group.
3.Synthesis of Novel Hypervalent Compounds
The highly reactive hypervalent reagents developed in this research provided many novel hypervalent compounds, such as (p-phenylene) bisiodonium salts, alkynyliodonium salts, diaryliodonium salts, aryl-and alkynyliodonium salts with carboxy group, 1-arylbenzothiophenium salts, and the related derivatives, in addition to liquid-crystalline diacetylenes and benzyne precursors.

Report

(1 results)
  • 1994 Final Research Report Summary
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 谷口宏・北村二雄 他1名: "Jmroved Preparation of Diaryliodonium Triflates" Synthesis. 147-148 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 谷口宏・北村二雄 他2名: "Ihtramqecular Cyclization to 1-Phenyl-1-benzothiphenium Salts by Electrophilic Addition" J.Chem.Soc.Perkin Trans.1. 1907-1911 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 谷口宏・北村二雄 他4名: "A New Type of Inclusion Compounds Composed of a Charge-Transfer Complex between Tetrakis(phenylethynyl)ethene" Chem.Lett.1921-1924 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 谷口宏・北村二雄 他3名: "Preparation and Coupling Reactions of Alkynyl(phenyl)iodonium Salts bearing Long Alkoxy Chains." J.Org.Chem.59. 8053-8057 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 谷口宏・北村二雄 他1名: "A Novel Hypervalent Iodine Reagent Prepared from o-Iodosylbenzoic Acid and Trifluotomethanesulfonic Acid." Tetrahedron Lett.36. 1081-1084 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Taniguchi, Tsugio Kitamura et al.: "Improved Preparation of DiaryliodoniumTriflates" Synthesis. 147-148 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Taniguchi, Tsugio Kitamura et al.: "Intramolecular Cyclization to 1-Pheny1-1-benzothiphenium Salts by Electrophilic Addition" J.Chem.Soc.Perkin Trans.1. 1907-1911 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Taniguchi, Tsugio Kitamura et al.: "A New Type of Inclusion Compounds Composed of a Charge-Transfer Complexbetween Tetrakis (phenylethynyl) ethene" Chem.Lett.1921-1924 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Taniguchi, Tsugio Kitamura et al.: "Preparation and Coupling Reactions of Alkynyl (phenyl)-iodonium Salts bearing Long Alkoxy Chains." J.Org.Chem.59. 8053-8057 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Taniguchi, Tsugio Kitamura et al.: "A Novel Hypervalent Iodine Reagent Prepared from o-Iodosylbenzoic Acid and Trifluoromethanesulfonic Acid." Tetrahedron Lett.36. 1081-1084 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary

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Published: 1994-04-01   Modified: 2016-04-21  

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