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

Palladium-Catalyzed Homo-Dimerization of Terminal Alkynes

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
› Author Affiliations
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).


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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