Process for the preparation of 3,5,6-trichloropyridin-2-ol

Details Process for the preparation of 3,5,6-trichloropyridin-2-ol Process for the preparation of 3,5,6-trichloropyridin-2-ol

C - Chemistry, Metallurgy

07

C

260/297, 260/294

C07C 253/30 (2006.01) C07C 255/19 (2006.01) C07C 255/21 (2006.01) C07D 211/88 (2006.01) C07D 213/64 (2006.01)

Patent

CA 2016620

h process for the preparation of 3,5,6-trichloropyridin-2-ol from trichloroacetyl chloride and aerylonitrile is improved by separately conducting the individual addition, cyclization and aromatization steps. By separating these steps, water and HCl, which are by-products of the latter steps, can be precluded from interfering with the earlier steps. The individual process steps have also been improved.

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