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Synthesis 2019; 51(15): 3014-3020
DOI: 10.1055/s-0037-1610702
DOI: 10.1055/s-0037-1610702
paper
A Regioselective Approach to C3-Aroylcoumarins via Cobalt-Catalyzed C(sp2)–H Activation Carbonylation of Coumarins
We acknowledge the financial support from the SOHA pharmaceutical company and the University of Tehran.Further Information
Publication History
Received: 22 January 2019
Accepted after revision: 12 March 2019
Publication Date:
02 April 2019 (online)


Abstract
A new cobalt-catalyzed C–H bond activation of coumarins with aryl halides or pseudohalides and carbon monoxide insertion to give various 3-aroylcoumarin derivatives is described. It is the first time that CO as C1 feedstock is used as the coupling partners in cobalt-catalyzed regioselective coumarin C–H functionalization reactions. Upon activation with manganese powder, the Co catalyzes the C–H bond activation carbonylation reactions of aryl iodides, bromides, and even triflates under mild conditions, providing the regioselective aroylated products in moderate to good yields.
Supporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0037-1610702.
- Supporting Information