Hydrochloric Acid → 1-(6-Chloropyridazin-3-yl)piperidin-4-amine

Participants

Reaction Steps

A mixture of 6 parts of ethyl [1-(6-chloro-3-pyridazinyl)-4-piperidinyl)carbamate and 60 parts of concentrate hydrochloric acid was stirred and refluxed for 24 hours. The reaction mixture was evaporated. Water was added and the whole was treated with concentrate ammonium hydroxide. The product was extracted with trichloromethane. The extract was dried, filtered and evaporated, yielding 3.8 parts (82%) of 1-(6-chloro-3-pyridazinyl)-4-piperidinamine: mp. 260° C. (dec.) (compound 225).

Provenance & Evidence