N-HETEROARYL-N'-(PYRID-2-YL-SULFONYL)UREAS, PROCESSES FOR THEIR PREPARATION, AND THEIR USE AS HERBICIDES AND PLANT GROWTH REGULATORS

摘要

N-Heteroaryl-N'-(pyrid-2-yl-sulfonyl)ureas, processes for their preparation, and their use as herbicides and plant growth regulators Compounds of the formula (I) (see formula I) in which R1 - R4, A, n, m and w are as defined in claim 1, are suitable as herbicides for controlling harmful plants and can be prepared, inter alia, from the sulfonamides of the formula (II) (see formula II) by reacting them with carbamates R*O-CO-NR4-A.