VERFAHREN ZUR HERSTELLUNG VON 4-CHLOR-2- BUTINYL-M-CHLORCARBANILAT

摘要

In the process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate (the herbicide barban) from the corresponding 4-hydroxy-2-butynyl m-chlorocarbanilate it has been discovered that yields and product quality are improved by employing dimethylformamide as reaction promoter in combination with thionyl chloride or phosgene as chlorinating agent.