Synthesis of (±)-2-fluorograndisol

(±)-2-Fluorograndisol (2) was synthesised by ring expansion–fluorination from 3-(1-isopropenylcyclopropyl)butane-1,3-diol methanesulphonate (15) with a Pri2NH–KHF2–(HF)n·Py complex (Py = pyridine).