Rhodium-catalyzed addition/ring-opening reaction of arylboronic acids with cyclobutanones.

@article{Matsuda2004RhodiumcatalyzedAR,
  title={Rhodium-catalyzed addition/ring-opening reaction of arylboronic acids with cyclobutanones.},
  author={Takanori Matsuda and Masaomi Makino and Masahiro Murakami},
  journal={Organic letters},
  year={2004},
  volume={6 8},
  pages={1257-9}
}
Cyclobutanones react with arylboronic acids in the presence of a catalytic amount of Rh(I) complex to afford butyrophenone derivatives through the addition of an arylrhodium(I) species to the carbonyl group, followed by ring-opening of the resulting rhodium(I) cyclobutanolate. [reaction: see text]