反应详情

Another method of preparing tetrachloropyridines is taught in Collins et al., J. Chem. Soc. (C) pages 167-174 (1971) wherein pentachloropyridine is reacted with hydrazine hydrate in ethanol and the resulting tetrachloro-4 and/or 2-hydrazinopyridine is oxidized with aqueous copper sulfate or silver oxide in ethanol. This reference also teaches pyrolyzing tetrachloro-4-hydrazinopyridine in sand at 160° C. to yield tetrachloropyridine. In addition, this reference teaches the preparation of 2,3,6-trichloropyridine from the reaction of tetrachloro-4-hydrazinopyridine with cuprous oxide in hot water.

1. customat 160° C.