申请人:BASF Aktiengesellschaft
公开号:US05795983A1
公开(公告)日:1998-08-18
A process for preparing salts of 3-isopropyl-2,1,3-benzothia-diazin-4-one 2,2-dioxide of the general formula I ##STR1## (R.sup.1 -R.sup.4 =H, lower alkyl, lower hydroxyalkyl) by reacting bentazone (IIa) with an amine IIIa in an organic solvent, by reacting bentazone (IIa) with an amine IIIa or an ammonium salt IIIb in a virtually water-immiscible organic solvent and taking up the salt I in water or by reacting bentazone (IIa) with an ammonium salt IIIb or bentazone-sodium (IIb) with an ammonium salt IIIc, in each case in water.
一种制备通式I的3-异丙基-2,1,3-苯并噻二嗪-4-酮2,2-二氧化物的盐的方法,其中通式I为:##STR1## (其中R.sup.1 -R.sup.4 =H、低碳基、低羟基烷基),通过将苯并噻草酮(IIa)与有机溶剂中的胺IIIa反应,或将苯并噻草酮(IIa)与几乎不溶于水的有机溶剂中的胺IIIa或铵盐IIIb反应,并在水中溶解盐I,或通过在水中分别将苯并噻草酮(IIa)与铵盐IIIb或苯并噻草酮钠(IIb)与铵盐IIIc反应。