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DEVELOPMENT OF USEFUL REACTIONS USING THE NOVEL LEAVING GROUP, MONOCHLATE

Research Project

Project/Area Number 10672015
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Chemical pharmacy
Research InstitutionRIKEN (The Institute of Physical and Chemical Research)

Principal Investigator

SHIMIZU Takeshi  RIKEN, SYNTHETIC ORGANIC CHEMISTRY LABORATORY, SENIOR RESEARCH SCIENTIST, 有機合成化学研究室, 先任研究員 (80087569)

Co-Investigator(Kenkyū-buntansha) SAKAMOTO Yasuharu  RIKEN, SYNTHETIC ORGANIC CHEMISTRY LABORATORY, RESEARCH SCIENTIST, 有機合成化学研究室, 研究員 (60280723)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1998: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordsrearrangement-ring expansion of cyclic ether / chloromethanesulfonate / monochlate / invertion of secondary alcohol / rearrangement of carbon-carbon bond / azide / carbon-nitrogen bond formation / nitrile / テトラヒドロピラン / 炭素-炭素結合形成反応 / 環状エーテルの転位-環拡大反応 / オキセパン / ビシクロオキソニウムイオン / 二級水酸基の反転反応 / 炭素-窒素結合形成反応 / 炭素-炭素結合の転位反応
Research Abstract

One of the important and most widely studied organic reactions is nucleophilic substitution at a saturated carbon. Although sulfonates are the most common leaving groups, we sometimes encounter problems such as low reactivity of the methanesulfonates (mesylates; Ms=CHィイD23ィエD2SOィイD22ィエD2-) and instability of the trifluoromethanesulfonates (triflates; Tf=CFィイD23ィエD2SOィイD22ィエD2-). We have found that chloromethanesulfonates (monochlate; Mc=C1CHィイD22ィエD2SOィイD22ィエD2-) served as an extremely efficient leaving group, which exceeds the corresponding mesylates and triflates. Inversion of a wide range of secondary alcohols using the monochlates with cesium acetate in the presence of 18-crown-6 in benzene under reflux has been performed to give the acetates with complete inversion of the configuration in high yields. We have examined further studies on the monochlate as the new and efficient leaving group and found several efficient reactions using monochlates; i.e., (1) rearrangement of the carbon-carbon bond, (2) conversion of secondary alcohols into azides with inversion of the configuration, and (3) conversion of a β-alkoxy primary alcohol into a nitrile.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Hori, N.: "WFS1 gene mutation search in depressive patients : Detection of 5 missense polymorphisms but no association with depression or bipolar affective disorder"Tetrahedron Lett.. 40. 2145-2148 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Simizu, T.: "Chloromethanesulfonate as an Efficient Leaving Group : Rearrangement of the Carbon-Carbon Bond and Conersion of Alcohols into Azides and Nitrils"synthesis. 1373-1385 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hiranuma, S., Shimizu, T., Nakata, T., Kajimoto, T. Wong, C.-H.: "Synthesis and Inhibition Analysis of Five-Membered Homoazasugars from D-Arabinofuractose via an S N2 Reaction of the Chloremethylsulfonate"Tetrahedron lett.. 36. 8274-8250 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shimizu, T., Hiranuma, S., Nakata, T.: "Efficient Method for Inversion of Secondary Alcohols by Reaction of Chloromethanesulfonates with Cesium Acetate"Tetrahedron Lett.. 37. 6145-6148 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shimizu, T.,Hiranuma, s., Nakata, T.: "New Reactions using Chloromethanesulfonate"RIKEN Review. 15. 13-14 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hori, N., Nagasawa, K., Shimizu, T., nakata, T.: "Efficient Synthesis of 2,3-trans-Tetrahydropyranes and Oxepanes: Rearrangement-Ring Expansion of Cyclic Ether Having a Chloromethanesulfonate"Tetrahedron Lett.. 40. 2145-2148 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shimizu, T., Ohzeki, T., Hiramoto, K., Hori, N., Nakata, T.: "Chloromethanesulfonate as an Efficient Leaving Group: Rearrangement of the Carbon-Carbon Bond and Conversion of Alcohols into Azides and Nitrils"Synthesis. 1373-1385 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hori N.,Nagasawa K.,Shimizu T.,Nakata T.: "Efficient Synthesis of 2,3-trans-Tetrahydropyranes and Oxepanes : Rearrangement-Ring Expansion of Cyclic Ethers Having a Chloromethanesulfonate"Tetrahedron Lett.. 40. 2145-2148 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Shimizu T.,Ohzeki T.,Hiramoto K.,Hori N.,Nakata T.: "Chloromethanesulfonate as an Efficient Leaving Group : Rearrangement of the Carbon-Carbon Bond and Conversion of Alcohols into Azides and Nitrils"Synthesis. 1373-1385 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hori: "Effieiest Synthesis of 2, 3-trans-Tetrahydrofuranes and Oxepanes:Rearrangement-Ring Expansion of Cyclic Ethers Having a Chloromethanesulfonate" Tetrahedron Lett.40(in press). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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