2-hydrocarbyl-3,6-dichloropyridines and their preparation

Details 2-hydrocarbyl-3,6-dichloropyridines and their preparation 2-hydrocarbyl-3,6-dichloropyridines and their preparation

C - Chemistry, Metallurgy

07

D

260/297

C07D 213/61 (2006.01)

Patent

CA 1314897

ABSTRACT 2-Hydrocarbyl-3,6-dichloropyridines are prepared from dichloromethyl hydrocarbyl ketones and acrylonitrile in a two-step process involving an addition reaction under basic conditions to form intermediate 1,1-dichloro-3-cyanopropyl hydrocarbyl ketones and a subsequent cyclization reaction in the presence of hydrogen chloride. Thus, 3,6-dichloro-2- methylpyridine is prepared from 1,1-dichloro-2- propanone and acrylonitrile by the formation and further reaction of 4,4-dichloro-5-oxo-hexanenitrile. The intermediates and products are novel compounds useful in the preparation of herbicides and nitrification inhibitors. 34,270A-F

546118

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