Rhodium‐Mediated Decarboxylative Conjugate Addition of Fluorinated Benzoic Acids: Stoichiometric and Catalytic Transformations

Depending on the bisphosphine ligand , the decarboxylation of 2,6‐difluorinated benzoic acids with a Rh I catalyst in the presence of an acrylic ester or acrylamide led preferentially to conjugate addition (product 1 ) or Heck–Mizoroki arylation (product 2 ; binap=2,2′‐bis(diphenylphosphanyl)‐1,1′‐binaphthyl, diop=4,5‐bis(diphenylphosphanylmethyl)‐2,2‐dimethyl‐1,3‐dioxolane).