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Synfacts 2013; 9(9): 0991
DOI: 10.1055/s-0033-1339561
DOI: 10.1055/s-0033-1339561
Metal-Mediated Synthesis
Fe-, Co- and Cu-Catalyzed Coupling Reactions Using N2O
Further Information
Publication History
Publication Date:
19 August 2013 (online)
![](https://www.thieme-connect.de/media/synfacts/201309/i_p094_s1_10-1055_s-0033-1339561.gif)
Significance
For the first time, N2O (‘laughing gas’) is reported to undergo oxidative homo-coupling reactions of Grignard reagents in the presence of metal catalysts under mild reaction conditions. Whereas less than 1 mol% of Fe(acac)3 and CoCl2 showed to be superior in the homo-coupling reactions of arylmagnesium reagents, also alkyl Grignard reagents undergo oxidative homo-coupling reactions in the presence of Li2CuCl4.
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Comment
The authors applied this new protocol also to oxidative cross-coupling reactions between sp2- and sp3-hybridized Grignard reagents. Therefore, PhMgCl and various primary and secondary alkyl Grignard reagents furnish the desired aryl–alkyl cross-coupling products in 59–83% yield.
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![](https://www.thieme-connect.de/media/synfacts/201309/i_p094_s1_10-1055_s-0033-1339561.gif)