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Synfacts 2008(10): 1091-1091  
DOI: 10.1055/s-2008-1078227
Metal-Mediated Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Mn-Catalyzed Benzene Synthesis from
1,3-Dicarbonyls and Acetylenes

Contributor(s): Paul Knochel, Andreas J. Wagner
Y. Kuninobu*, M. Nishi, S. Yudha S., K. Takai*
Okayama University, Japan
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Publikationsdatum:
22. September 2008 (online)

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Significance

The treatment of β-keto esters with terminal acetylenes in the presence of catalytic amounts of MnBr(CO)5 yields polysubstituted aromatics in good to excellent yields. Depending on the additives used, such as Sc(OTf)3 or molecular sieves, it is possible to selectively synthesize acylated or deacylated benzenes.