Strehl J, Hilt G. Electrochemical, Manganese-Assisted Carbon-Carbon Bond Formation between β-Keto Esters and Silyl Enol Ethers.
Org Lett 2019;
21:5259-5263. [PMID:
31247778 DOI:
10.1021/acs.orglett.9b01866]
[Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electrochemical carbon-carbon bond formation process between β-keto esters and silyl enol ethers was investigated utilizing manganese salts. The tricarbonyl compounds were generated in moderate to good yields under neutral conditions. Control experiments revealed that an electro-generated base at the cathode is important. Electroanalytical measurements with a Mn(TPA) complex suggested that the oxidation of the silyl enol ether is the first step in the oxidation process initiated by a corresponding Mn(IV) species.
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