Cesium carbonate → 3-(6-Chloro-3-methylpyridazin-4-yloxy)pyridin-2-amine

Participants

Reaction Steps

2-Aminopyridin-3-ol (5.0 g, 45.4 mmol) and 4,6-dichloro-3-methylpyridazine (7.4 g, 45.4 mmol, prepared according to WO 2003/041712) were dissolved in DMSO (100 mL). Cs2CO3 (16.3 g, 49.9 mmol) was added and the reaction stirred at ambient temperature for one hour. The reaction was diluted with water and the material was extracted with CH2Cl2, dried (Na2SO4), filtered and concentrated. Flash chromatography followed by trituration of the concentrated solid with EtOH gave 3-(6-chloro-3-methylpyridazin-4-yloxy)pyridin-2-amine (5.98 g, 25.3 mmol, 55%) as a solid.

Provenance & Evidence