Ici Australia Limited

Donald William Harney

Bruce Adam Forsyth

Errol J McGarry

Joseph C Rundle

Peter G Lehman

Graham J Bird

David Ernest Pryor

Matthew Bolte

George Richard Birchall

The invention relates to a process for the preparation of a compound of formula I ##STR1## R is alkyl, and X is bromine or iodine which process comprises: reacting a compound of formula II in a two phase system, said system comprising an aqueous phase and an organic phase comprising a water immiscible solvent, with an acylating agent of formula III or IV in the presence of a base catalyst. ##STR2##

Process for preparing benzonitriles

The invention concerns novel pesticidal esters of the pyrethrin or pyrethroid type in which the methylene group bonded to the ester carbonyl and/or ester oxygen bears a fluorine substituent. The compounds of the invention are active against insect pests including flies, moths, aphids and beetles and acarina pests including ticks.

Pesticidal fluorinated esters of the pyrethrin or pyrethroid type

A compound of the general formula I ##STR1## wherein R.sup.1 is halogen, R.sup.4 is a highly branched alkyl group, R.sup.2 and R.sup.3 which may be the same or different are hydrogen or halogen atoms or lower alkyl groups.

Compositions for killing internal parasites containing

A composition of matter for treating warm-blooded animals to eradicate internal parasites comprising a compound chosen from the group consisting of

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Doncaster, Australia

Donald William Harney