反应详情

Tetrabutylammonium fluoride (1M in THF) (0.87 mL, 0.87 mmol) was added to (2S)-3-(3-(tert-butyldimethylsilyloxy)azetidin-1-yl)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyrazin-2-yl)propanamide (Intermediate BB1) (520 mg, 0.87 mmol) in tetrahydrofuran (25 mL) under nitrogen. The resulting mixture was stirred at ambient temperature for 2 hours. Further tetrabutylammonium fluoride (1M in THF) (1.7 mL, 1.7 mmol) added and the mixture stirred overnight. The reaction mixture was quenched with saturated ammonium chloride solution (20 mL), diluted with ethyl acetate (50 mL) and stirred for 10 minutes. The organic layer was separated, washed with water (50 mL) and brine (50 mL), dried (MgSO4), filtered and evaporated. The crude product was purified by flash silica chromatography, eluting with 0 to 10% methanol in ethyl acetate, to afford the product (130 mg). 1H NMR (400 MHz, DMSO-d6) δ 2.50 (3H, m), 2.98-3.09 (3H, m), 3.15-3.21 (1H, m), 3.67-3.77 (2H, m), 4.19-4.29 (1H, m), 5.31 (1H, d), 5.77-5.84 (1H, m), 7.60-7.76 (3H, m), 7.80-7.82 (1H, m), 8.35-8.37 (1H, m), 8.57 (1H, s), 8.64 (1H, s), 9.11-9.12 (1H, m), 11.17 (1H, s); m/z (ESI+) (M+H)+=481; HPLC tR=1.52 min.

1. stirringthe mixture stirred overnight
2. customThe reaction mixture was quenched with saturated ammonium chloride solution (20 mL)
3. additiondiluted with ethyl acetate (50 mL)
4. stirringstirred for 10 minutes
5. customThe organic layer was separated
6. washwashed with water (50 mL) and brine (50 mL)
7. dry with materialdried (MgSO4)
8. filtrationfiltered
9. customevaporated
10. customThe crude product was purified by flash silica chromatography
11. washeluting with 0 to 10% methanol in ethyl acetate