Shell Oil Comapny

Shell Internationale Research Maatschappij, B.v.

Royston H Davis

Robert J Searle

John H Davies

Derek A Wood

Ronald F Mason

Trevor W Newton

Alastair McArthur

Herbert P Rosinger

Mark D Hilton

Terence N Mitchell

Mark E Schroeder

Dinesh M Patel

The invention provides 1,2,4-oxadiazole compounds of general formula ##STR1## wherein R.sup.1 represents an optionally substituted phenyl group, R.sup.2 represents an optionally substituted phenyl group and X represents an oxygen or sulphur atom; processes for their preparation and their use as pesticides, particularly as acarid ovicides.

Oxadiazole compounds, their preparation and their use as pesticides

Vinyl-tin compounds in which one of the carbon atoms of the vinyl moiety is bonded to the nitrogen atom of a nitrogen-containing moiety, useful for controlling invertebrate pests.

Pesticidal vinyl-tin compounds

Invertebrate insects are controlled by vinyl-tin compounds in which one or both of the carbon atoms of the vinyl moiety is substituted by an oxymethyl or thiomethyl moiety.

Use of certain vinyl-tin compounds as insecticides

Tetrahydro-2-nitrimino-2H-1,3-thiazine, useful as an insecticide.

Tetrahydro-2-nitrimino-2H-1,3-thiazine

A 2-nitriamino-1,3-diazacyclohexane of the formula ##STR1## wherein R is hydrogen, alkyl of from one to six carbon atoms or alkanoyl of from one to seven carbon atoms, and R.sup.1 is hydrogen or alkyl of from one to six carbon atoms, useful as insecticides.

Nitrimine derivatives

Certain esters of alpha-substituted-phenoxybenzyl alcohols of the formula ##STR1## wherein A represents certain optionally substituted aralkyl, alkyl or cyclopropyl groups at least one of X and Y is sulfur and the other independently represents oxygen or sulfur and R represents certain alkyl, alkenyl, alkynyl, aralkyl, alkaryl or aryl groups, hydrogen or a salt-forming cation, are useful as pesticides.

Phenoxybenzyl ester pesticides

Certain dispirocyclopropane carboxylates are useful as pesticides.

Dispirocyclopropane carboxylate pesticides

A process for converting water insoluble aldehydes to cyanohydrins by reacting the cyanohydrin of a ketone with the water insoluble aldehyde in an inert organic solvent in the presence of an organic base is described.

Transcyanohydrination

Cyclopropane derivatives of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl; R.sub.3 is hydrogen, alkynyl or cyano; R.sub.4 is optionally substituted phenyl and n is an integer of 2 to 5 are useful as pesticides.

Cyclopropane carboxylates

Alkyl esters of 3-cyano-3-(3-phenoxyphenyl)-2-ketopropionic acid, useful as precursors for the preparation of insecticidal esters of 3-phenoxy-.alpha.-cyanobenzyl alcohol.

Precursors for insecticides

Compounds of the formula ##EQU1## wherein R.sup.1 and R.sup.2 each is a halogen atom, R.sup.3 is hydrogen, alkynyl or cyano; R.sup.4 is phenoxyphenyl and n is an integer from 2 to 5, are useful as pesticides.

Pesticidal dihalovinyl-spiroalkanecyclopropane derivatives

Cyclopropane derivatives of the formula ##SPC1## Wherein R.sub.1 and R.sub.2 are alkyl; R.sub.3 is hydrogen, alkynyl or cyano; R.sub.4 is optionally substituted phenyl and in is an integer of 2 to 5, are useful as pesticides.

Growing community of inventors

Sittingbourne, United Kingdom

Royston H Davis