The Grignard reaction is a prominent textbook process to form carbon-carbon bonds. In this reaction, the so-called Grignard reagent, an organomagnesium species RMgX where R is an organic residue and X is a halogen (usually Cl or Br), promotes the addition of its organic residue to an electrophilic substrate.
Menthol
Final product via Grignard reaction pathway
Final product via Grignard reaction pathway
Final product via Grignard reaction pathway