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Volumn 137, Issue 29, 2015, Pages 9489-9496

Ruthenium-Catalyzed Formal Dehydrative [4 + 2] Cycloaddition of Enamides and Alkynes for the Synthesis of Highly Substituted Pyridines: Reaction Development and Mechanistic Study

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSIS; CATALYSTS; CHEMICAL REACTIONS; DENSITY FUNCTIONAL THEORY; HYDROCARBONS; PYRIDINE; REACTION INTERMEDIATES;

EID: 84938301138     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/jacs.5b06400     Document Type: Article
Times cited : (158)

References (101)
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    • note
    • For Selected examples for Ruthenium-catalyzed [2 + 2+2] cycloaddition to form pyridines
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    • 2 and KPF6 can also give the target product, but with inferior efficiency. DFT calculations using this cationic species as the real catalyst show similar reaction mechanism and regiochemistry (for more discussion, see the Supporting Information).
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    • gas in the gas phase).
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    • note
    • The computed activation free energies here in solution are higher than the expected value of the experiment, considering that the reaction was carried out at 100 °C. One of the sources for the overestimation of the reaction activation free energy is the entropy overestimation in solution: we used the gas-phase computed entropies as the estimated entropies in solution, and this approximation introduces entropy overestimation for the present two-molecule to one-molecule process, which converts two molecules (IN13 and HOAc) to one molecule (IN6).


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