A process for preparing saccharincarbonyl halides of the formula 1 ##STR1## where: X is halogen, R.sup.1, R.sup.2 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.1 -C.sub.4 -alkoxy, optionally C.sub.1 -C.sub.4 -alkyl-, fluorine- or C.sub.1 -C.sub.4 -alkoxy-substituted benzyl or phenyl, R.sup.3 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl or phenyl or benzyl which is optionally mono- or polysubstituted by C.sub.1 -C.sub.4 -alkyl, halogen, C.sub.1 -C.sub.4 -haloalkyl or C.sub.1 -C.sub.4 -alkoxy, by reaction of an isophthalylsulfonamide 2 with an inorganic acid halide to give the saccharincarbonyl halide 1 ##STR2## is described.
本发明涉及一种制备
糖精羰基卤代物的方法,其
化学式为1 ##STR1## 其中:X为卤素,R.sup.1,R.sup.2分别为氢,C.sub.1-C.sub.6烷基,C.sub.3-C.sub.8环烷基,C.sub.1-C.sub.4烷氧基,可选择为C.sub.1-C.sub.4烷基,
氟或C.sub.1-C.sub.4烷氧基取代的苄基或苯基,R.sup.3为氢,C.sub.1-C.sub.6烷基,C.sub.3-C.sub.8环烷基或苯基或苄基,可选择为单取代或多取代的C.sub.1-C.sub.4烷基,卤素,C.sub.1-C.sub.4卤代烷基或C.sub.1-C.sub.4烷氧基,通过将异苯二甲酰磺酰胺2与
无机酸卤反应,以得到
糖精羰基卤代物1 ##STR2##。