A process for the preparation of a 1-(2-oxyaminosulphonyl-phenylsulphonyl)-urea of the formula ##STR1## in which R.sup.1 is an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aralkyl and aryl, R.sup.2 is hydrogen or an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl and aralkyl, and R.sup.3 is an optionally substituted and/or optionally fused six-membered aromatic heterocyclic radical containing at least one nitrogen atom, comprising reacting water with a benzodisultam of the formula ##STR2## at a temperature between 0.degree. C. and 100.degree. C. The products are herbicidally active.
一种制备式为##STR1##的1-(2-氧胺磺酰基苯磺酰基)-
脲的方法,其中R.sup.1是一系列可选取的基团,包括烷基,烯基,炔基,环烷基,环烷基烷基,芳基烷基和芳基,R.sup.2是氢或一系列可选取的基团,包括烷基,烯基,炔基和芳基烷基,R.sup.3是一个可选取的和/或可选取的融合的六元芳香杂环基团,含有至少一个氮原子,包括将
水与式为##STR2##的苯二磺酰胺在0℃到100℃的温度下反应。 该产品具有除草活性。