Shell Oil Comapny

Michael D Barker

Eirlys R Isaac

James E Powell

Peter Kirby

Alexander F Orr

Graham C Smith

Eirlys R Barker

Compounds of the general formula ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl or aryl group, or R.sup.1 and R.sup.2 together represent an optionally substituted alkylene group;

Herbicidal tetrahydrofuran derivatives

Certain 3-phenylmethoxytetrahydropyrans, useful as herbicides.

3-Phenylmethoxytetrahydropyran herbicides

Novel tetrahydrofuran derivatives which are compounds of the general formula I or the N-oxides or salts thereof ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents a hydrogen atom, a halogen atom, or an optionally-substituted alkyl, cycloalkyl or aryl group, or R.sup.1 and R.sup.2 together represent an optionally-substituted alkylene group; each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6, any two or more of which may be the same or different, represents a hydrogen atom, a halogen atom, a mono- or di- alkylamino group or an optionally substituted alkyl, alkoxy, alkylthio or aryl group, or R.sup.3 and R.sup.5 have one of these meanings and R.sup.4 and R.sup.6 together represent a carbon-carbon bond; R.sup.7 represents a hydrogen atom or an optionally-substituted alkyl group; each of R.sup.8 and R.sup.9 independently represents a hydrogen atom or an optionally-substituted alkyl group; and Het represents an optionally-substituted fully unsaturated ring having 5 or 6 atoms in the ring of which one is a nitrogen atom and the remainder are carbon atoms; exhibit herbicidal activity.

Certain benzyloxymethyltetrahydrofuran derivatives are useful as herbicides.

Compounds of the formula ##STR1## wherein R.sub.1 is alkyl; R.sub.2 is alkyl, aryl or aralkyl; R.sub.3 is hydrogen or alkyl or R.sub.2 and R.sub.3 together is polymethylene; and R.sub.4 is 2,6-dihalobenzyl are useful as herbicides.

Compositions and methods of combatting weeds in crops with

Certain novel trihydric alcohol derivatives, useful as herbicides and fungicides.

Growing community of inventors

Sittingbourne, United Kingdom

Michael D Barker