Patent ID: 6054589
Filing Date: 2000-04-25
Classification: C07D

Abstract:
A process for preparing a 2-chloro-benzimidazole derivative of the formula ##STR26## wherein A represents the groups --CH.sub.2 --, --CF.sub.2 --, CCl.sub.2 --, --CF.sub.2 --CF.sub.2 --, --CHF--CF.sub.2, --CHF--CHF--, --CF.sub.2 --CFCl-- or CFCl--CFCl--,comprising the step of reacting a 1,3-dihydro-benzimidazole-one of the formula ##STR27## wherein A is as defined above andX represents oxygen,with phosphorous oxychloride at a temperature between 50.degree. C. and 150.degree. C.