Preparation of polychlorinated pyridines from 2,4-dichloro-6-(trichloromethyl)pyridine
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0007160A1
公开(公告)日:1980-01-23
Pentachloropyridine and polychloro derivatives of 2-(trichloromethyl)pyridine are prepared by reacting 2,4- diohloro-6-(trichloromethyl)pyridine in the liquid state with chlorine at temperatures of at least 160°C in the presence of a Lewis acid type catalyst. The products ara useful as herbicides, pesticides, or as chemical intermediates for the preparation of other products useful, for example, as herbicides or . pesticides.