An epoxytriazole derivative (V) useful as an intermediate for anti-fungal agents
and an intermediate therefor having high quality can be produced economically and
efficiently by the following industrial means. A compound of the following formula
(I) is reacted with trimethyloxosulfonium salt and the like in the presence of
a base to give compound (II), this compound is converted to compound (IV), and
this compound is reacted with 1,2,4-triazole in the presence of a base.
##STR1##
wherein Ar is a phenyl group optionally substituted by 1 to 3 halogen atom(s)
or trifluoromethyl group, R is a hydrogen atom or lower alkyl group, and X is a
leaving group.
