Gevorgyan A, Obst MF, Guttormsen Y, Maseras F, Hopmann KH, Bayer A. Caesium fluoride-mediated hydrocarboxylation of alkenes and allenes: scope and mechanistic insights.
Chem Sci 2019;
10:10072-10078. [PMID:
32055361 PMCID:
PMC6991174 DOI:
10.1039/c9sc02467k]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 09/11/2019] [Indexed: 11/21/2022] Open
Abstract
A caesium fluoride-mediated hydrocarboxylation of olefins is disclosed that does not rely on precious transition metal catalysts and ligands. The reaction occurs at atmospheric pressures of CO2 in the presence of 9-BBN as a stoichiometric reductant. Stilbenes, β-substituted styrenes and allenes could be carboxylated in good yields. The developed methodology can be used for preparation of commercial drugs as well as for gram scale hydrocarboxylation. Computational studies indicate that the reaction occurs via formation of an organocaesium intermediate.
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