abstract |
A process for preparing 2,3-dichlorosulphonyl-acrylonitriles is disclosed by reaction of 3-sulphonyl-propionitriles of the formula n n R.sup.1 --SO.sub.2 --CH.sub.2 --CH.sub.2 --CN n n wherein n R 1 denotes optionally substituted aryl, aralkyl, alkyl or cycloalkyl n with a chlorination agent in the presence of a basic catalyst at elevated temperature. |