Imperial Chemical Industries Limited

Edward McDonald

Roger Salmon

Alan J Whittle

Michael G Hutchings

This invention provides novel insecticidally and acaricidally active pyrimidine derivatives of formula (I): ##STR1## and stereoisomers thereof, wherein R.sup.1 is selected from alkyl; alkenyl; alkynyl; haloalkyl; haloalkenyl; and cycloalkyl optionally substituted by alkyl or halogen;

Pyrimidine derivatives

Insecticidally and acaricidally active pyrimidine esters and

Compounds of the formula ##STR1## wherein R.sup.2 represents an .alpha.-branched alkyl group containing from 3 to 6 carbon atoms, and R represents either (a) hydroxy, halo or alkoxy of up to six carbon atoms, or (b) the group --OR.sup.1 where R.sup.1 is the residue of an alcohol of formula R.sup.1 OH which forms an insecticidal ester with chrysanthemic acid, permethrin acid or cyhalothrin acid. Methods for using these compounds to combat insect and acarine pests, as well as novel intermediates, are also disclosed.

Cyclopropane derivatives

A compound of formula: ##STR1## wherein R.sup.1 represents hydrogen or halogen, R.sup.2 represents an .alpha.-branched alkyl or a cycloalkyl group containing from 3 to 6 carbon atoms, Q represents hydroxy, halo, alkoxy of up to 6 carbon atoms or a group --OR where R represents the residue of an alcohol of formula ROH which forms an insecticidal ester when combined with crysanthemic acid, or 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid, or 3-(2-chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2-dimethylcyclopropane carboxylic acid. The compounds are useful for combating insect and acarime pests.

Cyclopropane acids and derivatives thereof useful as intermediates, insecticidally active esters of these acids, compositions comprising these esters and methods of using the same. The compounds involved have the formula: ##STR1## wherein R.sup.2 represents an .alpha.-branched alkyl group containing from 3 to 6 carbon atoms, and R represents either (a) hydroxy, halo or alkoxy of up to six carbon atoms, or (b) the group --OR.sup.1 where R.sup.1 is the residue of an alcohol of formula R.sup.1 OH which forms an insecticidal ester with chrysanthemic acid, permethrin acid or cyhalothrin acid.

A compound of formula: ##STR1## wherein R.sup.2 represents an .alpha.-branched alkyl group containing from 3 to 6 carbon atoms, and R represents either (a) hydroxy, halo or alkoxy of up to six carbon atoms, or (b) the group --OR.sup.1 where R.sup.1 is the residue of an alcohol of formula R.sup.1 OH which forms an insecticidal ester with chrysanthemic acid, permethrin acid or cyhalothrin acid. The compounds have insecticidal and acaricidal properties.

Growing community of inventors

Marlow, United Kingdom

Edward McDonald