Oxopropylation of 4,5-dihalopyridazin-6-ones with chloroacetone afford
ed the corresponding 1-(2-oxo-propyl) derivatives. Reaction of title c
ompound with nucleophiles such as amines, alkoxides were investigated.
In addition, selective reduction of 3-nitro-1-(2-oxopropyl)pyridazin-
6-ones with iron/ammonium chloride in two phase solutions or zinc in a
cetic acid gave the corresponding 3-amino or 3-hydroxyimino derivative
s.