Herbicidal carboxamide derivatives

Abstract From the Canadian patent

Compounds of formula, (see formula I), wherein Z is oxygen or sulphur;, R1 is hydrogen halogen, alkyl or haloalkyl;, R2 is hydrogen or alkyl;, q is 0 or 1;, R3 is hydrogen; alkyl or alkenyl; the or each X independently is halogen optionally, substituted alkyl or alkoxy alkenyloxy, alkynyloxy, cyano, carboxy alkoxycarbonyl, (alkylthio)carbonyl, alkylcarbonyl amido, alkylamido, nitro, alkylthio, haloalkylthio alkenylthio, alkynylthio, alkylsulphinyl alkylsulphonyl, alkyloximinoalkyl or, alkenyloximinoalkyl; n is 0 or an integer from 1 to 5;, the or each Y independently is a halogen alkyl, nitro, cyano, haloalkyl, alkoxy or haloalkoxy; and m is 0 or an integer from 1 to 5, their preparation …