Cesium carbonate → Methyl 3-(8-(6-(2-(methoxymethyl)pyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoate

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Reaction Conditions

Reaction Steps

A mixture of methyl 3-(8-bromoimidazo[1,2-b]pyridazin-6-yl)benzoate (0.10 g, 0.3 mmol), 6-(2-(methoxymethyl)pyrrolidin-1-yl)pyridin-2-amine (0.083 g, 0.4 mmol), Pd2(dba)3 (0.019 g, 0.033 mmol), BINAP (0.083 g, 0.134 mmol) and Cs2CO3 (0.326 g, 1.0 mmol) in dioxane (20 mL) was heated to 100° C. for 16 h in a sealed tube under N2 atmosphere then concentrated in vacuo. The residue was purified by chromatography (silica gel, 10 g, 200˜300 mesh, ethyl acetate:petroleum ether=1:15) to afford methyl 3-(8-(6-(2-(methoxymethyl)pyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoate (0.050 g) as a yellow solid. LC-MS: [M+1]+=459, tR=1.985 min. This contained some unidentified impurities and was used directly without further purification.

Provenance & Evidence