• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Synthesis of Sequential Wholly Aromatic Polyketones Having Terphenyl Moiety in the Main Chain

Research Project

Project/Area Number 09650971
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 高分子合成
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

YONEZAWA Noriyuki  Tokyo University of Agriculture and Technology, Department of Material Systems Engineering, Associate Professor, 工学部, 助教授 (10167033)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1998: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsWholly aromatic polyketone / Sequential Polymer / Ring assembly / Terphenyl / Aromatic coupling / Transition metal complex / Electrophilic Aromatic Substitution / Direct condensation / 芳香族ポリケトン / 定序配列 / タ-フェニル / 交差芳香族カップリング / フリーデルクラフツアシル化反応 / 五酸化二リン-メタンスルホン酸混合物
Research Abstract

The preparation of wholly aromatic polyketones having terphenyl skeleton in the main chain by aromatic coupling reaction of o-terphenyl derivative bearing two chlorobenzoyl moieties (a) and the synthesis and polymerization of novel monomers containing trifluoromethyl side group for sequential polymers having ring-assembly structures (b) were investigated. (a) Two synthetic routes for bis(p-chlorobenzoyl)-o-terphenyl monomer were studied. Cross-coupling synthesis of the monomer was unsuccessful because of the failure of double cross-aromatic coupling of adjacent carbons on the aromatic ring. Synthesis of the o-terphenyl monomer was achieved by chemo- and regioselective direct acylation of o-terphenyl by p-chlorobenzoic acid. Aromatic coupling reaction of the o-terphenyl monomer was carried by use of transition metal (nickel) complex catalyst having triphenylphosphine and bipyridyl ligands in the presence of zinc powder as reducing reagent in an aprotic polar solvent such as dimethylacet … More amide, N-methyl-2-pyrolidone, or dimethylformamide. Because of the precipitation of the product in the early stage of polymerization, high-molecular-weight was not achieved. The highest inherent viscosity of the polyketones obtained was 0.17 dL/g (0.3 g/dL in conc. H_2SO_4, 30゚C). The resulting polyketone has glass transition temperature (Tg) at 184゚C.The weight loss was not observed till 450゚C, and the 10%-weight loss temperature was found to be 570゚C.(b) The synthesis of sequential polyketones having ring-assembly skeleton and fluorine-containing side group was undertaken. Three types of monomers were synthesized : 1) self-polymerization type monomer for head-to-tail polymer skeleton having both an acyl cation accepting moiety and an electrophile part with high regioselectivity, 2) a symmetric macro-monomer having three biphenylene units with two carboxyl groups giving head-to-head type polyketone structure by the reaction with 2,2'-dimethoxybiphenyl, and 3) biphenylenedicarboxylic acid monomer bearing one trifluoromethyl group giving random sequenced polyketone molecule. The polymerization was undertaken through direct polycondensation in P_2O_5-MsOH.The resulting three types polyketones have molecular-weights of 2800(head-to-head polyketone), 3300(head-to-tail), and 5800(random) based on the terminating group analysis using ^1H-NMR spectra. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] N.Yonezawa: "Structural Roquirements for Decarbonylative α, α-Diarylation Reaction of 2-Methoxyalkanoic Acids in Phosphorus Pentoxide-Methanesulfonic Acid Mixture Yielding 1, 1-Diarylalkane Homologs" Tetrahedron. 42. 14287-14295 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.Yonezawa: "New approaches in friedel-crafts type carbon-carbon bond formation using novel types of friedel-crafts mediators" Recent Research Development In Synthetic Organic Chemistry. 1. 213-223 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.Yonezawa: "ACID MEDIATED SPECIFIC α, α-DIARYLATION AND α-MONOARYLATION REACTIONS OF PYRUVIC ACID WITH/WITHOUT DECARBONYLATION" Synthetic Communications. 29(印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.Yonezawa: "The Reaction Routes of Specific Decarbonylative α, α-Diarylation of 2-Methoxypropanoic Acid Analogs in P_2O_5-MsOH and the Related Reagents" J.Organic Chemistry. 64(印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.Yonezawa: "Wholly Aromatic Polyketones (全芳香族ポリケトン)" Polymer Applications (高分子加工). 46. 199-207 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yonezawa, N. ; Hino, T. ; Tokita, Y. ; Matsuda, K. ; Ikeda, T.: "Structural Requirements for Decarbonylative alpha, alpha-Diarylation Reaction of 2-Methoxyalkanoic Acids in Phosphorus Pentoxide-Methanesulfonic Acid Mixture Yielding 1,1-Diarylalkane Homologys" Tetrahedron. 42. 14287-14295 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yonezawa, N. ; Hino, T. ; Tokita, Y. ; Matsuda, K. ; Ikeda, T.: "New approaches in friedel-crafts type carbon-carbon bond formation using novel types of friedel-crafts mediators" Recent Res.Devel.In Synthetic Organic Chem.1. 213-223 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yonezawa, N. ; Hino, T. ; Kinuno, T. ; Matsuki, T. ; Ikeda, T.: "ACID-MEDIATED SPECIFIC alpha, alpha-DIARYLATION AND alpha-MONOARYLATION REACTIONS OF PYRUVIC ACID WITH/WITHOUT DECARBONYLATION" Synth.Commun.(in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yonezawa, N. ; Hino, T. ; Shimizu, M. ; Matsuda, K. ; Ikeda, T.: "The Reaction Routes of Specific Decarbonylative a, a-Diarylation of 2-Methoxypropanioc Acid Analogs in P_2O_5-MsOH and the Related Reagents" J.Org.Chem.(in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yonezawa, N. ; Nakamura, H.: "Wholly Aromatic Polyketines" Polymer Applications. 46. 199-207 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.Yonezawa: "New approaches in friedel-crafts type carbon-carbon bond formation using novel types of friedel-crafts mediators" Recent Research Development in Synthetic Organic. 1. 213-223 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N.Yonezawa: "ACID-MEDIATED SPECIFIC α,α-DIARYLATION AND α-MONOARYLATION REACTIONS OF PYRUVIC ACID WITH/WITHOUT DECARBONYLATION" Synthetic Communications. 29・10(印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] N.Yonezawa: "The Reaction Routes of Specific Decarbonylative α,α-Diarylation of 2-Methoxypropanoic Acid Analogs in P_2O_5-MsOH and the Related Reagents" J.Organic Chemistry. 64・(印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 米澤 宣行: "全芳香族ポリケトン" 高分子加工. 46. 199-207 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 米澤 宣行: "主鎖にエーテル結合を持たない非晶性全芳香族ポリケトンの合成" 岩谷直治記念財団研究報告書. 20. 33-37 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Yonezawa: "Structural Requirements for Decarborylative α、α-Diarylation Reaction of 2-Methoxyalkanoic Acids in Pnosphorus Pentoxide-Methanesulfonic Acid Mixture Yielding 1, 1-Diarylalkane Homologs" Tetrahedron. 53. 14287-14296 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi