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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Manganese-catalyzed construction of tetrasubstituted benzenes from 1,3-dicarbonyl compounds and terminal acetylenes.

Treatment of beta-keto esters with terminal acetylenes in the presence of a catalytic amount of a manganese complex, MnBr(CO)5, and molecular sieves, gave multisubstituted aromatic compounds in good to excellent yields. This reaction employs [2 + 2 + 2] cycloaddition of beta-keto esters and 2 equiv of terminal acetylenes with dehydration. In the case of a 1,3-diketone, the corresponding acetophenone derivative and its deacylated compound can be synthesized selectively.[1]

References

  1. Manganese-catalyzed construction of tetrasubstituted benzenes from 1,3-dicarbonyl compounds and terminal acetylenes. Kuninobu, Y., Nishi, M., Yudha S, S., Takai, K. Org. Lett. (2008) [Pubmed]
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