There is described the preparation of phenylphenol compounds of formula (1)
by reaction of a keto compound of formula (3) with dioxolane of formula
(4) and with an ammonium compound of formula (5) to from
.beta.-aminoketone compound of formula (6) (reaction step (I)), reaction
of the compound of formula (6) with a compound of formula (7) to form a
compound of formula (2) (reaction step (II)), and subsequent alkylation to
form a compound of formula (1) (reaction step (III)) in accordance with
scheme (A); wherein R.sub.1, R.sub.2, R.sub.3, R.sub.6 and R.sub.7 are
each independently of the others hydrogen or C.sub.1 -C.sub.8 alkyl;
R.sub.4, R.sub.5 and R.sub.8 are each independently of the others hydrogen
or C.sub.1 -C.sub.5 alkyl; ant Hal is a halogen atom. The compounds
prepared in accordance with the invention are suitable as antimicrobial
active substances.
