of cyclopropanemethanols with pyridinium poly(hydrogenfluoride) in the presence of diisopropylamine and KHF2 gave selectively homoallylic fluorides or fluorocyclobutanes according to the mode of substitution of the starting cyclopropanemethanols. Cyclopropanemethanols with no substitution at 1-position of the cyclopropane ring gave homoallylic fluorides in a stereoselective manner. While, 1-methyl