Hydrochloric Acid → (2S)-2-(1-(3-chloropyridin-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-fluoropyridin-2-yl)-3-((S)-1-hydroxypropan-2-yloxy)propanamide

Participants

Reaction Steps

HCl (4M in Dioxane) (0.530 mL, 2.12 mmol) was added to (2S)-3-((S)-1-(tert-butyldimethylsilyloxy)propan-2-yloxy)-2-(1-(3-chloropyridin-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-fluoropyridin-2-yl)propanamide (Intermediate AO3) (638 mg, 1.06 mmol) in THF (5 mL) at room temperature. The resulting solution was stirred for 20 minutes. The reaction mixture was evaporated and the residue partitioned between EtOAc (25 mL) and sat NaHCO3 (10 mL). The organic layer was dried (MgSO4) and evaporated. The crude product was purified by preparative chiral-HPLC on a Merck 50 mm 20 μm Chiralpak AS column, eluting isocratically with 30% EtOH in isohexane (modified with Et3N) as eluent to afford the product (397 mg, 77%). 1H NMR (400 MHz, CDCl3) δ1.16 (d, 3H), 2.73 (s, 1H), 3.51-3.68 (m, 2H), 3.69-3.78 (m, 1H), 4.12-4.28 (m, 2H), 6.06 (t, 1H), 7.42-7.50 (m, 2H), 7.99-8.03 (m, 1H), 8.13 (d, 1H), 8.21-8.26 (m, 1H), 8.47 (s, 1H), 8.60-8.65 (m, 2H), 9.09 (s, 1H); m/z (ESI+) (M+H)+=488.42; HPLC tR=1.75 min

Provenance & Evidence