Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 354, Issue 17, Pages 3195-3199Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201200569
Keywords
alkynes; benzannulation; diazonium salts; phenanthrenes; visible light
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Funding
- NSFC [J1103305]
- Sun Yat-sen University
- Beijing National Laboratory of Molecular Sciences (BNLMS)
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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.
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