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1994 Fiscal Year Final Research Report Summary

Structural Elucidation and Synthetic Application of Organozinc reagents with Pronounced Nucleophilic Reactivity

Research Project

Project/Area Number 04453089
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 有機工業化学
Research InstitutionNagasaki University

Principal Investigator

TAMARU Yoshinao  Fac. of Engineering, Dep. of Applied Chem. Professor, 工学部, 教授 (80026319)

Project Period (FY) 1992 – 1994
KeywordsUnsymmetrical Ketone / Palladium Catalysis / Carbon monoxide / Organozinc / Allylic Substrates / Stereoselectivity / Regioselectivity / Umpolung of pi-Allylpalladium
Research Abstract

(1) The new synthetic reaction of unsymmetrically substituted ketones was developed. The reaction proceeds via the three-component connection reaction of allylic benzoates, carbon monoxide, and organozincs by the catalysis of palladium at room temperature under 1 atm of carbon monoxide. The reaction shows quite characteristic regio (alpha-and gamma-) -and stereoselectivity (inversion of configuration) with respect to the allylic moiety. The reaction is applicable to the combination of a wide structural variety of allylic substrates (benzoates, phosphates) and organozincs (IZn (CH_2)_n X,X=CO_2 Et, CN ; octylzinc iodide, diethylzinc).
(2) The new method of umpolung of pi-allylpalladium was developed. The umpolung of pi-allylpalladium takes place cleanly by treatment with diethylzinc via allyl-ethyl transmetallation reaction. The reaction can be catalytic with respect to palladium and the mixture of an allyl benzoate, a carbonyl compound (aldehyde, ketone, ester), diethylzinc, and tetrakis (triphenylphosphine) palladium provides the corresponding homoallyl alcohol in quite high yield. The reaction displays high regio-and stereoselectivity, having been not observed for the allylation with allyzinc halides.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] T.Bando et al.: "Regio-and Stereoselective Synthesis of 1,3-Hydroxy Amines via Palladiuim-catalyzed Carbonate-Carbamate Transformation......" J.Org.Chem.59. 1465-1474 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ono et al.: "Palladium Catalyzed Arylation of N-AlkylO-Aryl Carbamates:Synthesis of Cinnarmyl Alcohols via Heck Arylation" Tefrohedran Leth.35. 4133-4136 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kimura: "Palladiuim(2+) Catalyzed6 5-endo-trigonal Cyclization of 2-Hydroxy-3-butenylamines:Synthesis of Five-Membered Nitrogen Heterocycles" J.Chem.Soc.Chem.Commun.2531-2533 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tamaru et al.: "Convenient Synthesis of 4-Methylene-1,3-oxazolidin-2-ones and4-Methylene-1,3-oxazin-2-ones via Transition-metal Catalyzed....." Bull.Chem.Soc.Jpn. 67. 2838-2849 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tamaru et al.: "Highly Stereoselective Allylation of Aldehdye:Generation of Stereo-chemically Defined Allylzinc Species viaAlkyl-Allyl Exchange....." Angew.Chem.(1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yasui et al.: "Unsymmtrical Ketone Synthesis via Three-Component Connection Reactionof Organozincs,Allylating Agents, and Carbon Monoxide" J.Org.Chem.60. (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tamaru: "Tamaru's Reagent in "Encyclopedia of Reagents for Organic Synthesis"" John Wiley & Sons, (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tamaru et al.: ""Encyclopedia of Reagents for Organic Synthesis"" Urea in Y, (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Bando, H.Harayama, Y.Fukazawa, M.Shiro, K.Fugami, S.Tanaka, and Y.Tamaru: ""Regio-and Stereoselective Synthesis of 1,3-Hydroxy Amines via Palladium-catalyzed Carbonate-Carbamate Transformation with Unique Stereoselectivity"" J.Org. Chem.59. 1465-1474 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Ono, K.Fugami, S.Tanaka, and Y.Tamaru: ""Palladium Catalyzed Arylation of N-AlkylO-Aryl Carbamates : Synthesis of Cinnamyl Alcohols via Heck Arylation"" Tetrahedron Lett.35. 4133-4136 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Tamaru, H.Sakata, M.Kimura, H.Harayama, H.Konishi, K.Fugami, and S.Tanaka: ""Highly Regio-and Stereoselective Diels-Alder Reaction of Monothiomaleimide, an Ambident C=S and C=C Dienophile"" J.Chem. Soc., Chem. Commun.2365-2366 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Kimura, H.Harayama, S.Tanaka, and Y.Tamaru: ""Palladium (2+) Catalyzed 5-Endo-Trigonal Cyclization of 2-Hydroxy-3-butenylamines : Synthesis of Five-Membered Nitrogen Heterocycles"" J.Chem. Soc., Chem. Commun.2531-2533 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Tamaru, M.Kimura, S.Tanaka, S.Kure, and Z.Yoshida: ""Convenient Synthesis of 4-Methylene-1,3-oxazolidin-2-ones and 4-Methylene-1,3-oxazin-2-ones via Transition-metal Catalyzed Intramolecular Addition of Nitrogen Atom to Acetylenic Triple Bond"" Bull. Chem. Soc., Jpn.67. 2838-2849 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Tamaru, A.Tanaka, S.Goto, K.Yasui, and S.Tanaka: ""Highly Stereoselective Allylation of Aldehdye : Generation of Stereochemically Defined Allylzinc Species via Alkyl-Allyl Exchange Reaction between pi-Allylpalladium and Diethylzinc"" Angew. Chem.(1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Yasui, K.Fugami, S.Tanaka, and Y.Tamaru.: ""Unsymmtrical Ketone Synthesis via Three-Component Connection Reaction of Organozincs, Allylating Agents, and Carbon Monoxide"" J.Org. Chem.(1995)

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

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Published: 1996-04-15  

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