PROCESS FOR THE SYNTHESIS OF FIPRONIL

摘要

This invention relates to a process for the continuous synthesis of 5-amino-1-[2,6- dichloro-4-(rifluoromethyl)phenyl]-4-(rifluoromethylsulfinyl)-1H-pyrazole-3-carbonitrile comprising the step of reacting in a solvent 5-amino-1-[2,6-dichloro-4- (trifluoromethyl)phenyl]-4-(trifluoromethylthio)-1H-pyrazole-3-carbonitrile with an oxidizing agent. The process provides a more efficient and more robust process than the existing processes.