Importance of bases on the copper-catalyzed oxidative homocoupling of terminal alkynes to 1,4-disubstituted 1,3-diynes

2012 ◽  
Vol 53 (41) ◽  
pp. 5559-5561 ◽  
Author(s):  
Xinjiang Niu ◽  
Chunju Li ◽  
Jian Li ◽  
Xueshun Jia
Keyword(s):  
Terminal Alkynes ◽  
Oxidative Homocoupling

Ligand and additive free aerobic synthesis of diynes using Pd–CuFe2O4 magnetic nanoparticles as an efficient reusable catalyst

2020 ◽  
Vol 44 (42) ◽  
pp. 18199-18207
Author(s):  
Rituparna Chutia ◽  
Bolin Chetia
Keyword(s):  
Magnetic Nanoparticles ◽  
Recyclable Catalyst ◽  
Reusable Catalyst ◽  
Terminal Alkynes ◽  
Oxidative Homocoupling

Herein, we present the synthesis of Pd–CuFe2O4 magnetic nanoparticles as an efficient and recyclable catalyst for the oxidative homocoupling of various terminal alkynes to form symmetric 1,3-diynes.

Synergistic effect of bimetallic PdAu nanocrystals on oxidative alkyne homocoupling

2018 ◽  
Vol 54 (93) ◽  
pp. 13155-13158 ◽  
Author(s):  
Zheng Chen ◽  
Rongan Shen ◽  
Chen Chen ◽  
Jinpeng Li ◽  
Yadong Li
Keyword(s):  
Synergistic Effect ◽  
Heterogeneous Catalyst ◽  
Synergistic Effects ◽  
Terminal Alkynes ◽  
Oxidative Homocoupling

A bimetallic Pd–Au heterogeneous catalyst with synergistic effects is developed to efficiently catalyze oxidative homocoupling of terminal alkynes.

Oxidative homocoupling of terminal alkynes under palladium-, ligand- and base-free conditions using Cu(II)-clay as a heterogeneous catalyst

2014 ◽  
Vol 17 (4) ◽  
pp. 316-323 ◽  
Author(s):  
Bashir Ahmad Dar ◽  
Dushyant Vyas ◽  
Varsha Shrivastava ◽  
Saleem Farooq ◽  
Amit Sharma ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Terminal Alkynes ◽  
Oxidative Homocoupling

Palladium acetate complexes bearing chelating N-heterocyclic carbene (NHC) ligands: Synthesis and catalytic oxidative homocoupling of terminal alkynes

2009 ◽  
Vol 694 (25) ◽  
pp. 4014-4024 ◽  
Author(s):  
Tsun-Hung Hsiao ◽  
Tzu-Liang Wu ◽  
Sandipan Chatterjee ◽  
Chin-Yi Chiu ◽  
Hon Man Lee ◽  
...  
Keyword(s):  
Palladium Acetate ◽  
Terminal Alkynes ◽  
Oxidative Homocoupling

scholarly journals Copper-Catalyzed Eglinton Oxidative Homocoupling of Terminal Alkynes: A Computational Study

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Jesús Jover
Keyword(s):  
Computational Study ◽  
Reductive Elimination ◽  
Terminal Alkynes ◽  
Dft Methods ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Rate Limiting ◽  
Oxidative Homocoupling

The copper(II) acetate mediated oxidative homocoupling of terminal alkynes, namely, the Eglinton coupling, has been studied with DFT methods. The mechanism of the whole reaction has been modeled using phenylacetylene as substrate. The obtained results indicate that, in contrast to some classical proposals, the reaction does not involve the formation of free alkynyl radicals and proceeds by the dimerization of copper(II) alkynyl complexes followed by a bimetallic reductive elimination. The calculations demonstrate that the rate limiting-step of the reaction is the alkyne deprotonation and that more acidic substrates provide faster reactions, in agreement with the experimental observations.

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