Alpha-(4-(3'-fluor-5'-halogen-pyridyl-2'-oxy)-phenoxy-)-propionic-acid derivatives with herbicidal activity

摘要

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 IMAGE (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.