Tetrabutylammonium Fluoride → HCID 57504434, compound

Participants

Reaction Steps

Tetrabutylammonium fluoride (1M in THF) (0.328 mL, 0.33 mmol) was added to (2S)-3-(3-(tert-butyldimethylsilyloxy)azetidin-1-yl)-2-(1-(3-chloropyridin-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide (Intermediate AD9) (195 mg, 0.33 mmol) in THF (2 mL) under nitrogen. The resulting mixture was stirred at ambient temperature for 6 hours. The reaction mixture was quenched with saturated NH4Cl, diluted with DCM and poured onto a phase separator. The organic layer was evaporated to a gum. The crude product was purified by flash silica chromatography, elution gradient 0 to 10% MeOH in EtOAc to afford the product (38.0 mg, 24.12%). 1H NMR (400 MHz, CDCl3) δ 1.23-1.29 (1H, m), 2.29 (3H, s), 3.16-3.32 (4H, m), 3.76-3.87 (2H, m), 4.46-4.53 (1H, m), 5.91 (1H, t), 7.44-7.49 (1H, m), 7.50-7.55 (1H, m), 7.97-8.03 (1H, m), 8.07-8.15 (2H, m), 8.42 (1H, s), 8.59-8.65 (2H, m), 9.58 (1H, s) m/z (ES+) (M+H)+=481.51; HPLC tR=1.14 min.

Provenance & Evidence