Shell Oil Comapny

Peter Kirby

Eirlys R Isaac

Michael D Barker

Graham C Smith

Eirlys R Barker, Nee Isaac

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 derivatives of 2-alkyl glycerols are useful as herbicides.

Herbicidal 2-alkyl glycerol derivatives

Cyclic acetals of the formula ##EQU1## where R.sub. 1 is hydroxy, alkoxy, or NHZ, Z is hydrogen, alkyl, cycloalkyl, benzyl, or optionally substituted phenyl, R.sub. 2 is hydrogen or alkyl, R.sub.3 is alkyl, and R.sub.4 is aralkyl, are useful as herbicides.

Cyclic acetals of alpha-oxocarboxylic acid derivatives

A composition comprising compounds of the formula ##EQU1## wherein R.sub.1 and R.sub.2 each is alkyl; R.sub.3 is substituted carbamoyl or thiocarbamoyl; and R.sub.4 is optionally substituted phenyl, are useful as herbicides.

Herbicidal amide compositions

New compounds of the formula ##EQU1## wherein R.sub.1 and R.sub.2 each is alkyl; R.sub.3 is a nitrogen-containing heterocyclic group; and R.sub.4 is optionally substituted phenyl, are useful as herbicides.

Growing community of inventors

Maidstone, United Kingdom

Peter Kirby