SUBSTITUTED TETRAHYDROPYRIMIDINE SUBSTANCES, PROCEDURES FOR PREPARING IT, AND HERBICIDES CONTAINING THESE DERIVATIVES AS ACTIVE SUBSTANCE

摘要

A substituted tetrahydropyrimidinone of the formula IMAGE in which Ar each independently is an alpha -naphthyl group or a group of the formula, IMAGE X is halogen, lower alkyl, lower alkoxy, nitro, cyano, lower alkylcarbonyl, lower alkoxycarbonyl, trifluoromethyl or phenoxy, and n is 0, 1, 2 or 3, which possesses herbicidal activity.