| abstract |
(57) [Summary] [Objective] Fluorocyclopropanes useful as intermediates for quinolones are conveniently synthesized. ## STR1 ## Formula (I): (Wherein X represents a chlorine atom, a bromine atom or an iodine atom. COOR 1 represents an ester), in the presence of one or more compounds selected from a sulfoxide compound and a sulfone compound, or MBH m R 2 n II (wherein M is an alkali metal atom, an alkaline earth metal atom or a zinc atom, and R 2 is a hydrogen atom, a cyano group or an alkoxyl group) in the absence of the formula (II) Or an acyloxy group, m is an integer of 1 to 4, n is an integer of 0 to 3, and the sum of m and n is 4.) The fluorocyclopropanes are obtained by treating with a compound represented by |