C-H Bond Alkylations and Difluoromethylation of Tertiary Phosphines Using a Ruthenium Catalyst.

-C-H bond functionalization of tertiary phosphines was developed using [Ru(-cymene)Cl] as a catalyst. Desired product structures were confirmed by single-crystal X-ray diffraction. Mechanistic experiments indicated that -C-H bond functionalization was a radical reaction and that a hexagonal ruthenacycle complex was a crucial intermediate in the process.