FORFARANDE FOR BEKEMPNING AV ICKE ONSKADE GRES SAMT HERBICIDA MEDEL FOR ANVENDNING DERVID INNEHALLANDE VISSA HETEROCYKLISKT SUBSTITUERADE 4-OXIFENOXIALKANKARBONSYRADERIVAT

摘要

Compounds of the formula I in which (R)n is hydrogen, halogen, CF3, NO2, CN, alkyl, alkoxy or alkylthio, A is O, S, NH, or N-alkyl, R1 is hydrogen or alkyl and Z is a carboxylic acid, carboxylic ester, thiol ester, carbonamide, carbohydrazide, thioamide, nitrile, hydroxymethyl, acyloxymethyl, carbamoylmethyl, or sulfonyloxymethyl group, ARE VALUABLE HERBICIDES FOR THE SELECTIVE CONTROL OF WEED GRASSES. The novel compounds are prepared by known methods, for example by reacting halo-benzthiazoles, -benzoxazoles or -benzimidazoles with unilaterally etherified hydroquinones.