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Phenanthrene Synthesis by Eosin Y‐Catalyzed, Visible Light‐ Induced [4+2] Benzannulation of Biaryldiazonium Salts with Alkynes

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A metal‐free, visible light‐induced [4+2] benzannulation of biaryldiazonium salts with alkynes was developed. With eosin Y as photoredox catalyst, a variety of 9‐substituted or 9,10‐disubstituted phenanthrenes were obtained via a cascade radical addition and cyclization sequence.

Document Type: Communications


Affiliations: School of Chemistry and Chemical Engineering, Sun Yat-Sen University, 135 Xingang West Road, Guangzhou 510275, People's Republic of China, phone: (+86)-20-8411-0217, Fax: (+86)-20-8411-0217

Publication date: November 26, 2012

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