.alpha.-¬4-(3'-FLUORO-5'-HALOPYRIDYL-2'-OXY)-PHENOXY - PROPIONIC ACID DERIVATIVES HAVING HERBICIDAL ACTIVITY

Abstract From the Canadian patent

There are described novel .alpha.-4-(3'-fluoro-5'-halopyridyl-2'-oxy)-phenoxy-propionic acid esters and -thioesters having a herbicidal action and an action reducing the growth of grasses, which compounds correspond to the formula I, (I), wherein, Q is oxygen or sulfur Hal is halogen, and, R is hydrogen, a metal cation an ammonium group, an, unsubstituted or substituted alkyl cycloalkyl, alkenyl or alkynyl group, or an imino ether group -N=C R1R2, in which R1 and R2 separately are each alkyl, or together they form a 4- or 5-membered methylene chain. These compounds are suitable for selectively controlling weeds in crops of cultivated plants, or for reducing the growth of grasses.