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A facile synthesis of a diverse array of benzo[b]fluorenone derivatives has been developed. The method involves a Cu0/Selectfluor‐catalyzed tandem annulation of 1,6‐enynes, which takes place under mild reaction conditions. For tert‐butylethynyl‐substituted 1,6‐enynes, the major reaction pathway was a tandem annulation/C–C‐bond‐cleavage/fluorination process leading to fluorinated benzo[b]fluorenones...
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