PROCESS FOR THE PREPARATION OF 1- (2-OXYAMINOSULPHONYL-PHENYLSULPHONYL)-3-HETEROARYL- UREAS

摘要

ABSTRACT23189-6056A process for the preparation of a1-(2-oxyaminosulphonyl-phenylsulphonyl)-urea ofthe formulain whichR1 is an optionally substituted radicalfrom the series comprising alkyl, alkenyl,alkinyl, cycloalkyl, cycloalkylalkyl,aralkyl and aryl,R2 is hydrogen or an optionally substitutedradical from the series comprising alkyl,alkenyl, alkinyl and aralkyl, andR3 is an optionally substituted and/oroptionally fused six-membered aromaticheterocyclic radical containing at leastone nitrogen atom,comprising reacting water with a benzodisultam of theformulaat a temperature between 0°C and 100°C. The productsare herbicidally active.Le A 23 313