反应详情

温度

85 °C

A solution of 6-bromo-4-chloropyrrolo[1,2-b]pyridazine-3-carboxamide (Intermediate 2, 0.4 g, 1.46 mmol) in DMF (2 mL), was added (3R,4S)-benzyl 3-amino-4-methoxypyrrolidine-1-carboxylate (enantiopure Intermediate 12, 0.40 g, 1.60 mmol) and N,N-diisopropylethylamine (0.3 mL, 3.1 mmol). The mixture was heated at 85° C. overnight. After cooling, the mixture was added water, stirred for 3 h, filtered, rinsed with water, and dried to give (3R,4S)-benzyl 3-((6-bromo-3-carbamoylpyrrolo[1,2-b]pyridazin-4-yl)amino)-4-methoxypyrrolidine-1-carboxylate (0.62 g, 87% yield) as a brown solid. MS (ES+) m/z: 487.1, 488.3 (M+H); LC retention time: 3.82 min (analytical HPLC Method).

1. temperatureAfter cooling
2. filtrationfiltered
3. washrinsed with water
4. customdried