Trifluoroacetic acid → 2-((S)-2-((4-amino-3-(2-fluoro-4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)methyl)pyrrolidine-1-carbonyl)-4-(ethylamino)-4-methylpent-2-enenitrile

Participants

Reaction Steps

To a solution of tert-butyl 5-((S)-2-((4-amino-3-(2-fluoro-4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)methyl)pyrrolidin-1-yl)-4-cyano-2-methyl-5-oxopent-3-en-2-yl(ethyl)carbamate (60 mg, 0.089 mmol) in DCM (8 mL) was added 2 mL of CF3COOH. The mixture was stirred for 2 h at room temperature, then concentrated and purified by Prep-HPLC. Conditions: (1#-Pre-HPLC-001(SHIMADZU)): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, water with 0.05% TFA and CH3CN (40% CH3CN up to 100% in 20 min); Detector, 254 nm. This resulted in 12 mg (16%) of the title compound as a white solid and bis TFA salt. LC-MS: m/z 569 (M+H+). H1-NMR (400 MHz, CDCl3+D2O, ppm): 8.31 (s, 1H), 7.51-7.44 (m, 3H), 7.37 (s, 1H), 7.28-7.25 (m, 1H), 7.13 (d, J=7.6 Hz, 2H), 6.95 (dd, J=8.4, 2.0 Hz, 1H), 6.85 (q, J=11.6 Hz, 2.0 Hz, 1H), 4.89-4.65 (m, 3H), 3.76-3.57 (m, 4H), 2.14-1.83 (m, 4H), 1.50-1.49 (d, 6H), 1.31 (t, q=6.8 Hz, 3H).

Provenance & Evidence