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Synfacts 2011(7): 0774-0774  
DOI: 10.1055/s-0030-1260508
Metal-Mediated Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Fe-Catalyzed Phenanthrene Synthesis via [4+2] Benzannulation

Contributor(s): Paul Knochel, Andreas K. Steib
A. Matsumoto, L. Ilies, E. Nakamura*
The University of Tokyo, Japan
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Publication History

Publication Date:
17 June 2011 (online)

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Fe-Catalyzed Phenanthrene Synthesis via [4+2] BenzannulationSynfacts 2011; 2011(11): 1263-1263
DOI: 10.1055/s-0031-1289298

Significance

An iron-catalyzed [4+2] benzannulation of internal or terminal alkynes with biaryl or 2-alkenylphenyl Grignard reagents has been disclosed. This new oxidative coupling reaction takes place under mild conditions with iron(III) acetyl­acetonate as the most efficient catalyst.