2-(POLY-SUBSTITUTED ARYL)-6-AMINO-5-HALO-4-PYRIMIDINECARBOXYLIC ACIDS AND THEIR USE AS HERBICIDES

This invention relates to certain novel 2-(poly-substituted aryl)-6-amino-5-halo-4-pyrimidinecarboxylates and their derivatives and to the use of these compounds as herbicides. A number of pyrimidinecarboxylic acids and their pesticidal properties have been described in the art. It has now been found that certain 2-(poly-substituted aryl)-6-amino-5-halo-4-pyrimidinecarboxylic acids and their derivatives may be superior herbicides with a broad spectrum of weed control against woody plants, grasses and sedges as well as broadleafs and with excellent crop selectivity. The compounds may also possess excellent toxicological or environmental profiles. The invention includes compounds of Formula I: (see formula I) wherein Q represents a halogen; R1 and R2 independently represent H, C1-C6 alkyl, C3-C6 alkenyl, C3-C6 alkynyl, hydroxy, C1-C6 alkoxy, amino, C1-C6 acyl, C1-C6 carboalkoxy, C1-C6 alkylcarbamyl, C1-C6 alkylsulfonyl, C1-C6 trialkylsilyl or C1-C6 dialkyl phosphonyl or R1 and R2 taken together with N represent a 5- or 6-membered saturated ring; and Ar represents a polysubstituted aryl group. La présente invention concerne des acides 6-amino-5-halo-4-pyrirnidinecarboxyliques ayant des substituants d~aryle poly-substitué en position 2, ainsi que leurs dérivés d~amine et d~acide, en tant qu~herbicides puissants permettant le contrôle d~une large gamme d~herbes.