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Keywords:

  • C[BOND]H activation;
  • oxidative carbonylation;
  • palladium;
  • synthetic methods;
  • xanthones
Thumbnail image of graphical abstract

Two at once: Xanthones with different functional groups were obtained with CO (balloon) in the presence of a simple catalytic system that consists of Pd(OAc)2, K2S2O8, and trifluoroacetic acid (see scheme). Preliminary mechanism studies reveal that the second C[BOND]H functionalization might be the rate-determining step.