Hydrazine hydrate (1:1) → HCID 178438396, compound

Participants

Reaction Steps

A mixture of 2-(bis-methylsulfanyl-methylene)-1-(5-methyl-1H-benzoimidazol-2-yl)-pentan-1-one [˜0.49 mmole, Reference Example 2(l)] and hydrazine hydrate (200 μL) in ethanol (6 mL) was heated at reflux temperature for 2 days, then evaporated. The mixture was then treated with hydrochloric acid (4 mL, 4N) and heating was continued at reflux temperature for a further 24 hours. The reaction mixture was cooled, then neutralised by addition of sodium hydroxide solution (4N) and then extracted with dichloromethane. The extract was evaporated to give 5-methyl-2-(5-methylsulfanyl-4-propyl-1H-pyrazol-3-yl)-1H-benzoimidazole. MS: 287 (M+H)+.

Provenance & Evidence