Synthesis of Monofluoromethylcyclopropanes from Alkenes without Using Freons: Novel Synthesis of Chlorofluoromethyl Phenyl Sulfide and Its Application in Cyclopropanation

Chlorofluoromethyl phenyl sulfide was prepared from the reaction of chloromethyl phenyl sulfide with Selectfluor™. Monofluorocyclopropanation of an alkene was achieved via cyclopropanation using a fluorocarbene derived from the product chlorofluoromethyl phenyl sulfide, followed by oxidation and desulfurization.