Journal
ORGANIC LETTERS
Volume 13, Issue 3, Pages 474-477Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol102816a
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Funding
- Roche Research Foundation
- Novartis Foundation
- Fonds der Chemischen Industrie
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Complex tetracyclic ring systems were assembled by a photoinduced rearrangement of 3,3'-bis(arylbenzofurans). Irradiation of 1 under N-2 atmosphere yielded the benzonaphthofurans 2 in 75-90% yield. When the reaction was conducted under an O-2 atmosphere in the presence of tetracyanoethylene (TCNE) a different reaction pathway was observed leading to the isolation of 3 as the major product. Also, the photochemical properties of these novel structures were investigated.
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