Ici Americas, Inc.

Siok H Wee

Michael P Prisbylla

Compounds having the formula ##STR1## wherein R and R.sup.1 are hydrogen, halogen, trifluoromethyl or C.sub.1 -C.sub.4 alkoxy and Ar is a substituted phenyl group as herbicide.

Certain 3-(substituted phenyl)-5-(substituted

1-alkyl-3-arylimidazolidine-2,4-diones are prepared by reacting the herbicidally active intermediate N-phenyl-2-substituted-2-alkylamino acetamides with 1,1'-carbonyldiimidazole in a suitable solvent. These herbicidally active intermediates are prepared by reacting alpha-haloacetanilides with the primary amine of choice in an alcohol solvent, in the presence or absence of water, at ambient temperature.

1-alkyl-3-aryl imidazolidine-2,4-diones and herbicidal use

5-Substituted 2,4-imidazolidinediones having the formula ##STR1## wherein R is alkyl, phenyl or phenyl substituterd with alkyl, alkoxy, halo, haloalkyl, nitro or combinations thereof;

Growing community of inventors

Berkeley, CA, United States of America

Siok H Wee