Cesium carbonate → 6-Chloro-4-[6-(2-dimethylamino-1,1-dimethyl-ethoxy)-pyridazin-3-ylamino]-2-methyl-2H-pyridazin-3-one

Participants

Reaction Conditions

Reaction Steps

In a 15 mL microwave reaction vial was added a solution of 6-(1-(dimethylamino)-2-methylpropan-2-yloxy)pyridazin-3-amine (110 mg, 523 μmol, Eq: 1.00) in dioxane (5 ml) under argon. To the solution was added 4-bromo-6-chloro-2-methylpyridazin-3(2H)-one (152 mg, 680 μmol, Eq: 1.3), Cs2CO3 (511 mg, 1.57 mmol, Eq: 3), xantphos (45.4 mg, 78.5 μmol, Eq: 0.15) and bis(dibenzylideneacetone)palladium (22.6 mg, 39.2 μmol, Eq: 0.075). The reaction tube was sealed and heated in oil bath at 110° C. (bath temp) for 7 hrs, then was cooled to room temperature and stirred overnight. The reaction mixture was filtered and the solid was washed with THF (20 mL). The combined filtrate and washes were concentrated in vacuo. The reaction mixture was absorbed on to silica and purified by LC chromatography eluting with 0-5% (MeOH) in 1/1 EtOAc/heptane to afford 130 mg (70%) of the title compound.

Provenance & Evidence