Hydrazine hydrate (1:1) → HCID 67453629, compound

Participants

Reaction Conditions

Reaction Steps

To a 5 mL microwave reaction vessel was added 6-(2-chloropyridin-3-yl)-N-((1-(3-fluoropyridin-2-yl)cyclobutyl)methyl)pyridazin-3-amine (750 mg, 2.0 mmol), hydrazine hydrate (1 mL), and dioxane (4 mL). The reaction was heated in a microwave reactor to 160° C. for 15 min, then diluted with ethyl acetate (50 mL), and washed with brine (20 mL). The organic layer was dried over Na2SO4, filtered, and concentrated to give a crude solid that was purified by reverse phase column chromatography to give 150 mg of N-((1-(3-fluoropyridin-2-yl)cyclobutyl)methyl)-6-(2-hydrazinylpyridin-3-yl)pyridazin-3-amine as an off-white solid. The isolated product was then dissolved in methanol and added to a vial containing ˜1 mL of Raney Nickel suspension in water. The mixture was then stirred under 50 psi of hydrogen for 2 h. The reaction was then filtered, concentrated, and purified by reverse phase column chromatography to give 10 mg (88%) of 6-(2-aminopyridin-3-yl)-N-((1-(3-fluoropyridin-2-yl)cyclobutyl)methyl)pyridazin-3-amine as an off-white solid, m/z=351.1 [M+H].

Provenance & Evidence