Sodium hydrosulfide hydrate → HCID 178505612, compound

Participants

Reaction Steps

A solution of 6-chloro-3-(2-fluorophenyl)-[1,2,4]triazolo[4,3-b]pyridazine (1 mmol) and sodium hydrosulfide hydrate (1.5 equiv.) in ethanol was refluxed for 2-6 hours. The solvent was removed under reduced pressure, water (2 ml) was added, and the pH adjusted to 9 with sodium hydroxide solution. After removing the resulting precipitate, the filtrate was acidified with 6M HCl to a pH of 3, and the formed precipitate was collected, washed with cold water, and dried to give 3-(2-fluorophenyl)-[1,2,4]triazolo[4,3-b]pyridazine-6-thiol. This compound is taken on to the next step without purification

Provenance & Evidence