Trifluoroacetic acid → 4-(5-(6-(Piperazin-1-yl)pyridin-3-yl)-2-((quinolin-2-yloxy)methyl)imidazo[1,2-a]pyrazin-8-yl)morpholine

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Reaction Steps

To a solution of compound 47a (144 mg, 0.240 mmol) in DCM (1 mL) was added TFA (0.8 mL). The resulting mixture was stirred at rt for 1 h and concentrated under reduced pressure. The residue obtained was dried under reduced pressure overnight, suspended in 20 mL of diethyl ether, sonicated for 5 min and concentrated. The solid obtained was dried under reduced pressure for 4 h to obtain a residue which was dissolved in 1:1 MeOH/DCM solution (5 mL) and filtered through a sodium bicarbonate cartridge. The filtrate was concentrated under reduced pressure and the resulting residue was triturated in ether to give compound 47b. Mass Spectrum (LCMS, ESI pos.) Calcd. for C29H30N8O2: 523.2 (M+H). Found 523.3.

Provenance & Evidence