Heterocyclically substituted n-sultamsulfonamides, process for their preparation and their use as herbicides and plant growth regulators

Abstract From the Canadian patent

Abstract of the disclosure Heterocyclically substituted N-sultamsulfonamides processes for their preparation and their use as herbicides and plant growth regulators Compounds of the formula I or their salts (I), wherein, R1 and R2 denote H, halogen alkyl, alkenyl, alkynyl or, alkoxy, which can be substituted or denote -(CH2)n-COOR11;, R3 denotes H alkyl, alkenyl or alkynyl;, R4 denotes a heterocyclic radical of the formulae or , where E is CH or N; X is 0 or 5 and a b, c, d, e in each, case denote 0, 1 or 2 with the proviso that c + d + e >, 2, possess excellent herbicidal and plant growthregulating properties.