Trifluoroacetic acid → 2-cyano-3-[4-[[7-(2,2-dimethylpropanoyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]amino]phenyl]-N-ethyl-prop-2-enamide

Participants

Reaction Steps

To a 20 ml vial 2-cyano-3-[4-[[7-(2,2-dimethylpropanoyl)-5-(2-trimethylsilylethoxy-methyl)-pyrrolo[2,3-b]pyrazin-2-yl]amino]phenyl]-N-ethyl-prop-2-enamide (37 mg, 0.07 mmol was dissolved in DCM (3 ml) and TFA (2.63 ml, 18.88 mmol) was added. The reaction mixture was stirred at room temperature for 3 hr. The solvent was evaporated, the residue was neutralized with NaHCO3 to pH 7-8 and the aq. layer was extracted with EtOAc. The solvent was evaporated and the residue was dissolved in methanol (5 ml). HCl (4 drops) and water, were added and the reaction mixture was stirred at RT overnight. The reaction was neutralized with NaHCO3 to pH 7-8. The product was precipitated, filtrated and washed by water to yield 20 mg 2-cyano-3-[4-[[7-(2,2-dimethylpropanoyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]amino]phenyl]-N-ethyl-prop-2-enamide as dark red brown solid.

Provenance & Evidence