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1997 Fiscal Year Final Research Report Summary

Catalytic Asymmetric Synthesis of Aminophosphonic Acids Directed toward Peptide Mimetics

Research Project

Project/Area Number 08672413
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Chemical pharmacy
Research InstitutionOsaka University (1997)
The University of Tokyo (1996)

Principal Investigator

SASAI Hiroaki  Osaka University, Institute of Scientific and Industrial Research, Professor, 産業科学研究所, 教授 (90205831)

Project Period (FY) 1996 – 1997
KeywordsYtterbium / Rare Earth / Asymmetric Catalyst / Aminophosphonic Acid / Imine / Dimethyl Phosphite / Heterobimetallic / Multifubctional Catalyst
Research Abstract

The catalytic and enantioselective hydrophosphonylation of cyclic imines has achieved for the first time. In addition, we have uncovered a new and highly efficient asymmetric approach to cyclic-amino phosphonates using thiazolines as the imine model component. The desired pharmaceutically interesting phosphonates could be synthesized by a heterobimetallic (R)-LnPB-catalyzed (Ln=lanthanoid metal, P=potassium, B=(R)=binaphthol) hydrophosphonylation of the C=N double bond with up to 98% enantiomeric excess and up to 98% chemical yield. A detailed investigation concerning the dependence of enantioselectivity and chemical yield, respectively, on a series of reaction parameters (e.g., lanthanoid and alkali metal, splvent, reaction temperature, pressure, and catalytic amount) is reported. An optimized catalytic lanthanoid system "(R)-YbPB(5 mol %) / 50゚C / 48 h / THF-toluene (1 : 7)" was found. The catalytically active complex was isolated and analyzed by spectroscopic methods. In addition, ^<32>P and ^1H NMR spectroscopic and LDI-TOF mass spectrometric investigations were carried out to support a postulated mechanistic course for this (R)-LnPB-complex-catalyzed hydrophosphonylation reaction.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Harald Groger: "First Catalytic Asymmetric Hydrophosphonylation of Cyclic Imines : Highly Efficient Enantioselective Approach to a 4-Thiazolidinylphosphonate via Chiral Titanium and Lanthanoid Catalysts" Tetrahedron Lett.37. 9291-9292 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Harald Groger: "A New and Highly Efficient Asymmetric Route to Cyclic α-Amino Phosphonates : The First Catalytic Enantioselective Hydrophosphonylation of Cyclic Imines Catalyzed by Chiral Heterobimetallic Lanthanoid Complexes" J.Am.Chem.Soc.120(in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Harald Groger: "First Catalytic Asymmetric Hydrophosphonylation of Cyclic Imines : Highly Efficient Enantioselective Approach to a 4-Thiazolidinyl-phosphonate via Chiral Titanium and Lanthanoid Catalysts" Tetrahedron Lett.37. 9291-9292 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Harald Groger: "A New and Highly Efficient Asymmetric Route to Cyclic alpha-Amino Phosphonates : The first Catalytic Enantioselective Hydrophosphonylation of Cyclic Imines Catalyzed by Chiral Heterobimetallic Lanthanoid Complexes" J.Am.Chem.Soc.120 in press. (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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