NEW DERIVATIVES OF PYRIDINE,PREPARATION AND USAGE THEREOF

摘要

The compounds of the formula I are new. The substituent in the formula I has the meaning given in Claim 1. The new compounds are prepared by iodination of 2-chloro-4-hydroxypyridine, followed if appropriate by its conversion to the corresponding salts or esters. The new compounds are notable for their good herbicidal action and are used to control unwanted plants.