Hydrogen Peroxide → HCID 68350417, compound

Participants

Reaction Steps

A 2.0 M aqueous NaOH (0.6 mL, 1.200 mmol) was added dropwise to a solution of (3S,4R)-benzyl 4-((6-bromo-3-cyanopyrrolo[1,2-b]pyridazin-4-yl)amino)-3-fluoro-3-methylpyrrolidine-1-carboxylate (120 mg, 0.254 mmol) in methyl sulfoxide (2 mL), methanol (2 mL) and hydrogen peroxide (0.3 mL, 2.94 mmol) at 0° C. After 1 h at 0° C., the mixture was quenched with saturated NaHCO3 (5 mL), diluted with ethyl acetate (80 mL), washed with water, brine, dried (MgSO4) and concentrated. The residue was purified by silica gel chromatography, eluting with 20 to 80% ethyl acetate in hexanes, to give (3S,4R)-benzyl 4-((6-bromo-3-carbamoylpyrrolo[1,2-b]pyridazin-4-yl)amino)-3-fluoro-3-methylpyrrolidine-1-carboxylate (115 mg, 92% yield). 1H NMR (400 MHz, chloroform-d) δ ppm 10.71 (d, J=8.4 Hz, 1H), 7.98-7.85 (m, 1H), 7.73-7.59 (m, 1H), 7.51-7.30 (m, 5H), 6.79 (d, J=7.5 Hz, 1H), 5.79-5.54 (m, 2H), 4.69-4.33 (m, 1H), 4.32-4.08 (m, 1H), 4.00-3.74 (m, 1H), 3.59-3.42 (m, 2H), 1.61-1.43 (m, 3H); MS (ES+) m/z: 490.1 (M+H).

Provenance & Evidence