(Het) arylsulfonylureas having an amino function, their presentation and their use as herbicides and plant growth regulators
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United States of America Patent
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Jun 25, 2002
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N/A
app pub date -
May 13, 1997
filing date -
May 15, 1996
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Expired
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Abstract
(Het)Arylsulfonylureas having an imino function, their preparation, and their use as herbicides and plant growth regulators Compounds of the formula (I) and salts thereof ##STR1## in which A is a (hetero)aromatic or heterocyclic bridge linked to the group SO.sub.2 by a direct bond, or via O, S, NH, CH.sub.2 or via alkylated NH or alkylated methylene, B is a group having an imino-containing fragment N.dbd.C--N, N.dbd.C--S, N.dbd.C--O or N.dbd.C--C which is linked to A by one of the nitrogen atoms of the fragment, R.dbd.H or an aliphatic radical, W.dbd.O or S and X, Y and Z are as defined in claim 1 are suitable as herbicides and plant growth regulators. The preparation is carried out for example similarly to known processes via novel intermediates of the formula (XII) (cf. claims 6 and 10),
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