Process for producing 2,3,5-trichloropyridine

Details Process for producing 2,3,5-trichloropyridine Process for producing 2,3,5-trichloropyridine

C - Chemistry, Metallurgy

07

D

260/295.2

C07D 213/61 (2006.01)

Patent

CA 1137088

5-12872/= Process for producing 2,3,5-trichloropyridine ABSTRACT OF THE DISCLOSURE Production of 2,3,5-trichloropyridine by reacting 3,5-dichloro-2-pyridone at 30 to 150° with phosgene in the presence of an N,N-disubstituted formamide of the formula Image in which R1 and R2 can be identical or different and are each an alkyl group having 1 to 4 carbon atoms, or R1 and R2 together with the nitrogen atom form the pyrrolidino,: piperidino or morpholino, and in the presence of an inert solvent. 2,3,5-trichloropyridine is a valuable intermediate for producing herbicidally active .alpha.-[4-(3',5'-dichloropyrid-2- yloxy)-phenoxy]-alkanecarboxylic acids and derivatives thereof.

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