Substituted derivatives of phenylsulfonyl urea, process and intermediates for their preparation and herbicidal compositions containing the derivatives.

摘要

Herbicidally active substituted phenylsulfonyl urea derivatives of the formula IMAGE in which X is phenyl or phenoxy, R is IMAGE and R1 and R2 each independently is methyl or methoxy. They are made from phenylisocyanates of the formula -SO2-N=C=O which are produced by reacting a phenylsulfonamide of the formula IMAGE with phosgene or with trichloromethyl chloroformate in the presence of an aliphatic isocyanate.