Patent ID: 8530704

Claim:
A preparation method of fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether comprising the single step of: reacting a liquid mixture consisting essentially of compounds as specified in a general formula (1), 1,1,1,3,3,3-hexafluoroisopropanol, an acid-binding agent, a solvent and a phase-transfer catalyst, CH 2 FX (1) wherein: X is either Cl, Br or I; and the solvent is selected from straight chain ether, cyclic ether, nitrile compound, N,N-dimethyl formamide, N,N-dimethyl acetamide, N-methylpyridine flavanone or dimethyl sulfoxide or their combination; wherein the yield is 46.69 or higher.