Cesium carbonate → 2-((2-Chloro-5-cyano-3-(morpholinomethyl)phenyl)amino)-4-(cyclopropyl(4-methoxybenzyl)amino)imidazo[2,1-f][1,2,4]triazine-7-carbonitrile

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-amino-4-chloro-5-(morpholinomethyl)benzonitrile (32 mg, 0.13 mmol), 2-chloro-4-(cyclopropyl(4-methoxybenzyl)amino)imidazo[2,1-f][1,2,4]triazine-7-carbonitrile (Intermediate 9)(47 mg, 0.13 mmol), Cs2CO3 (85 mg, 0.262 mmol), DPPF (7.3 mg, 0.013 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethyxanthene (7.6 mg, 0.013 mmol) in a microwave vial was flushed with nitrogen. Dioxane (1 mL) was added and the vial was sealed and heated at 100° C. for 4 hr. The reaction was diluted with EtOAc and filtered through celite. The solvent was removed and radial silica gel chromatography eluting with hexane containing 5 to 40% EtOAc afforded 2-((2-chloro-5-cyano-3-(morpholinomethyl)phenyl)amino)-4-(cyclopropyl(4-methoxybenzyl)amino)imidazo[2,1-f][1,2,4]triazine-7-carbonitrile (33 mg, 44% yield) as an oil. This was dissolved in DCM (1.5 mL) and anisole (0.158 mL, 1.447 mmol) and TFA (0.9 mL) were added. After stirring at room temperature overnight, the solvent was removed and the residue was dissolved in MeOH and applied onto a SCX column. This was washed with MeOH and then eluted with 2 N NH3 in MeOH with DCM. Silica gel radial chromatography eluting with DCM containing 1% MeOH gave the title compound (19 mg) as a white solid.

Provenance & Evidence