Inserting CO.sub.2 into Terminal Alkynes via Bis

The direct interaction between CO.sub.2 and terminal alkynes in the presence of bis-(NHC)-metal catalysts at ambient conditions was studied. Two Cu and Ag-based bis-N-heterocyclic carbene Transition Metal catalysts were synthesized. The (NHC).sub.2-Ag complex showed a better catalytic performance to...

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Bibliographic Details
Published in:Catalysis letters 2017-02, Vol.147 (2), p.463
Main Authors: Díaz Velázquez, Heriberto, Wu, Zhao-Xuan, Vandichel, Matthias, Verpoort, Francis
Format: Article
Language:English
Subjects:
Acetylene
Copper (Metal)
Metal catalysts
Transition metal compounds
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Summary:The direct interaction between CO.sub.2 and terminal alkynes in the presence of bis-(NHC)-metal catalysts at ambient conditions was studied. Two Cu and Ag-based bis-N-heterocyclic carbene Transition Metal catalysts were synthesized. The (NHC).sub.2-Ag complex showed a better catalytic performance towards the carboxylation of terminal alkynes in comparison with the copper analogue even for the conversion of acetylene gas. The optimized conditions for the carboxylation are: the use of Cs.sub.2CO.sub.3 as additive, one atmosphere CO.sub.2 and room temperature using 1% mol catalyst. Mechanistic insight into the reaction mechanism is obtained by means of state-of-the-art first principles calculations.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-016-1920-5