反应详情

In a similar manner to that described in step (e) of Example I ethyl 2,6-difluorobenzimidate is reacted with 3-chloro-5-trifluoromethyl-2-(2,6-dichloro-4-isocyanatophenoxy)pyridine to give ethyl N-[4-(3-chloro-5-trifluoromethylpyrid-2-yloxy)-3,5-dichlorophenylcarbamoyl]-2,6-difluorobenzimidate (Compound IV). The intermediate isocyanate is obtained by the procedure of step (c) of Example 1 from 2-(4-amino-2,6-dichlorophenoxy)-3-chloro-5-trifluoromethylpyridine. This compound is described in Japanese published patent application No. 79-125699 (Chemical Abstracts, vol. 92, 146618d).