Triethanolammonium acetate as a multifunctional ionic liquid in the palladium-catalyzed green Heck reaction |
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Authors: | Zorica D Petrovi? Svetlana Markovi? Vladimir P Petrovi? Du?ica Simijonovi? |
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Institution: | (1) Faculty of Science, University of Kragujevac, 12 Radoja Domanovića, 34000 Kragujevac, Serbia; |
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Abstract: | An efficient green Heck reaction protocol was performed using a triethanolammonium acetate ionic liquid–palladium(II) catalytic
system. The ionic liquid used acts as a reaction medium, base, precatalyst-precursor, and mobile support for the active Pd
species. Our experimental investigation indicates that performing the Heck reaction in ionic liquid is superior to the same
procedure carried out in triethanolamine. The mechanism of the reaction of triethanolammonium acetate with PdCl2 was examined using density functional theory (M06 method). It was found that two Pd(II) complexes are formed, one of which
acts further as a precatalyst yielding catalytically active Pd(0) complex. The calculated activation energies are in agreement
with our experimental findings. |
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Keywords: | |
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