Sodium hydrosulfide hydrate → HCID 178505612, compound
Reaction equation
Cl[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[F:17])=[N:9][N:10]=2)[N:7]=1.O.[SH-:19].[Na+]>C(O)C>[F:17][C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=1[C:8]1[N:6]2[N:7]=[C:2]([SH:19])[CH:3]=[CH:4][C:5]2=[N:10][N:9]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
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