Tetrabutylammonium Fluoride → HCID 46175432, compound

Participants

Reaction Steps

Tetrabutylammonium fluoride (1M in THF) (0.892 mL, 0.89 mmol) was added to (2S)-3-((R)-1-(tert-butyldimethylsilyloxy)propan-2-yloxy)-N-(5-chloropyridin-2-yl)-2-(1-(3-chloropyridin-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)propanamide (Intermediate AN4) (460 mg, 0.74 mmol) in THF (5 mL) under nitrogen. The resulting mixture was stirred at room temperature for 1 hour. The reaction mixture was quenched with saturated NH4Cl (10 mL), extracted with EtOAc (3×15 mL), the combined organic layers were back washed with water (10 mL), dried (MgSO4), and evaporated to afford crude product. The crude product was purified by flash silica chromatography, eluting with 0 to 90% EtOAc in isohexane to afford the product (256 mg, 68.3%). 1H NMR (400 MHz, DMSO) δ1.07 (d, 3H), 3.26-3.37 (m, 1H), 3.38-3.47 (m, 1H), 3.61-3.71 (m, 1H), 4.07-4.18 (m, 2H), 4.57 (t, 1H), 5.87-5.93 (m, 1H), 7.74-7.79 (m, 1H), 7.88-7.93 (m, 1H), 8.00-8.06 (m, 1H), 8.32-8.37 (m, 1H), 8.41 (d, 1H), 8.57 (s, 1H), 8.66 (s, 1H), 8.67-8.70 (m, 1H), 11.15 (s, 1H) m/z (ESI+) (M+H)+=504.37; HPLC tR=1.96 min

Provenance & Evidence