Trifluoroacetic acid → (+/-) 2-((2-Chloro-5-cyano-3-(3-(morpholine-4-carbonyl)-4-(oxetan-3-yl)piperazin-1-yl)phenyl)amino)-4-(cyclopropylamino)imidazo[2,1-f][1,2,4]triazine-7-carbonitrile

Participants

Reaction Conditions

Reaction Steps

(+/−) Tert-butyl (2-((2-chloro-5-cyano-3-(3-(morpholine-4-carbonyl)-4-(oxetan-3-yl)piperazin-1-yl)phenyl)amino)-7-cyanoimidazo[2,1-f][1,2,4]triazin-4-yl)(cyclopropyl)carbamate (40 mg, 0.057 mmol) was taken up in DCE (275 μL) and anisole (31.0 μL, 0.284 mmol) was added. The reaction was cooled to 0° C., and TFA (92 μL, 1.193 mmol) was added. The reaction was stirred at 0° C. for 30 min, then warmed to room temperature and stirred for 1.5 h. The solvent was removed in vacuo and the material was azeotroped 2× with toluene to remove the excess TFA. The crude material was purified by preparative HPLC to provide (+/−)2-((2-chloro-5-cyano-3-(3-(morpholine-4-carbonyl)-4-(oxetan-3-yl)piperazin-1-yl)phenyl)amino)-4-(cyclopropylamino)imidazo[2,1-f][1,2,4]triazine-7-carbonitrile (3.9 mg).

Provenance & Evidence