Polychlorodipyridoimidazolium compounds and their use in the pre

Details Polychlorodipyridoimidazolium compounds and their use in the pre Polychlorodipyridoimidazolium compounds and their use in the pre

1991-10-22

1993-07-20

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 85, 546 2, C07D21326, C07D213127

Patent

active

052295206

ABSTRACT:
Polychlorodipyridoimidazolium tetrachloroferrate compounds, such as 1,2,3,4,11-pentachloro-8-(trichloromethyl)dipyrido[1,2-a:1',2'-]imidazol-1 0-ium tetrachloroferrate, 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.degree. C. and pressures above about 300 psig (2.17 mPa).

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