Method for producing an epoxy triazole derivatives and intermediates

Formula in the presence of a base a compound represented by (I), is reacted with trimethyloxosulfonium salt, etc., to give compound (II), it was converted to compound (IV), further, the presence of a base, 1 by reaction with 2,4-triazole, an industrial means useful epoxy triazole derivatives (V) and intermediates thereof as intermediates of antifungal agents, can be inexpensively, producing better quality and efficiency . (In the formula, Ar, substituted with 1 to 3 halogen atoms or a trifluoromethyl group indicates a phenyl radical, R is a hydrogen atom or a lower alkyl group, X represents a leaving group .)