Patent ID: 8686166

Claim:
A method for preparing a 2,2-bis(fluoroalkyl)oxirane of formula (A), comprising: reacting a fluorinated alcohol of formula (1) with a chlorinating agent, brominating agent or sulfonylating agent under basic conditions to form an oxirane precursor of formula (2), and subjecting the oxirane precursor to ring closure under basic conditions, wherein R 1 and R 2 are each independently a C 1 -C 6 straight or branched fluoroalkyl group, R 3 and R 4 are each independently hydrogen or a C 1 -C 15 straight, branched or cyclic monovalent hydrocarbon group, or R 3 and R 4 may bond together to form a ring with the carbon atom to which they are attached, X is chlorine, bromine or â€”OSO 2 R 5 group, and R 5 is a C 1 -C 15 straight, branched or cyclic alkyl group or an aryl group which may comprise a heteroatom.