Polychlorodipyridoimidazolium compounds and their use in the preparation of pentachloropyridine
申请人:DowElanco
公开号:EP0538837A1
公开(公告)日:1993-04-28
Polychlorodipyridoimidazolium tetrachloroferrate compounds, such as 1,2,3,4,11-pentachloro-8-(trichloromethyl)dipyrido[1,2-a:1',2'-c]imidazol-10-ium tetrachloroferrate of formula (I) which are obtained as by-products in the preparation of polychloropyridine and polychloropicoline compounds by chlorination of many chloro(trichloromethyl)pyridine compounds in the presence of ferric chloride catalyst and can be prepared by heating a mixture of a chloro-2-(trichloromethyl)pyridine compound with a 2-chloro-5-(trichloromethyl)pyridine compound, can be converted to pentachloropyridine by chlorination at temperatures above about 230°C and pressures above about 300 psig (2.17 mPa).
多氯二吡啶咪唑鎓四氯化铁化合物,如 1,2,3,4,11-五氯-8-(三氯甲基)二吡啶并[1,2-a:式(I)的 1,2,3,4,11-五氯-8-(三氯甲基)二吡啶并[1,2-a:1',2'-c]咪唑-10-鎓四氯亚铁酸盐,其作为制备多氯吡啶和多氯硝基啉化合物的副产品,是在三氯化铁催化剂存在下,通过氯化许多氯(三氯甲基)吡啶化合物而得到的,可通过加热氯-2-(三氯甲基)吡啶化合物与 2-氯-5-(三氯甲基)吡啶化合物的混合物而制备、在温度高于约 230°C 和压力高于约 300 psig(2.17 mPa)。