Synthesis 2023; 55(24): 4062-4079
DOI: 10.1055/a-2124-3903
short review

Palladium-Catalyzed Homo-Dimerization of Terminal Alkynes

Authors

  • Xia Chen

    a   School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, Guizhou, 553004, P. R. of China
    b   State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, P. R. of China
  • Hong-Yu Guo

    b   State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, P. R. of China
  • Xiao-Yu Zhou

    a   School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, Guizhou, 553004, P. R. of China
  • Ming Bao

    b   State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, P. R. of China

The authors are grateful to the National Natural Science Foundation of China (22172014, 22062012 and 22262019), the Natural Science Foundation of Guizhou Province (qiankehejichu-ZK [2023]zhongdian048), and the Foundation of Guizhou Educational Committee (qianjiaoji [2023] 088) for financial support. This work was also supported by the Liaoning Revitalization Talents Program (XLYC1802030) and the Natural Science Foundation of Liaoning, China (2019JH3/30100001).


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Abstract

The palladium-catalyzed homo-dimerization of terminal alkynes is a powerful and atom-economic method for the preparation of highly unsaturated four-carbon skeletons, which are key structural units found in natural and/or biologically active products and materials. However, during the homo-dimerization of terminal alkynes, a major issue is control of the chemo-, regio-, and stereoselectivity. Thus, over the past few decades, various strategies and methods have been developed that employ palladium catalytic systems for such homo-dimerizations. In this Short Review, we highlight important methods for the selective synthesis of these valuable four-carbon compounds, including conjugated 1,3-enynes, 1,3-diynes, and 1,3-dienes.

1 Introduction

2 Redox-Neutral Homo-Dimerization of Terminal Alkynes for the Synthesis of 1,3-Enynes

2.1 Head-to-Head Dimerization

2.2 Head-to-Tail Dimerization

3 Oxidative Homo-Dimerization of Terminal Alkynes for the Synthesis of 1,3-Diynes

3.1 Unsupported Palladium Catalysts

3.1.1 Choice of Oxidant

3.1.2 Choice of Ligand

3.1.3 Choice of Solvent

3.2 Supported Palladium Catalysts

4 Reductive Homo-Dimerization of Terminal Alkynes for the Synthesis of 1,3-Dienes

5 Conclusion



Publication History

Received: 07 June 2023

Accepted after revision: 06 July 2023

Accepted Manuscript online:
06 July 2023

Article published online:
16 August 2023

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