反应详情

A solution of 1.0 M aqueous HCl (2.76 mL) was added slowly to a solution of (2R)-4-[4-(2,3-difluoro-4-methoxyphenyl)-2-oxopyridin-1(2H)-yl]-2-methyl-2-(methylsulfonyl)-N-(tetrahydro-2H-pyran-2-yloxy)butanamide (132 mg, 0.26 mmol) in 1,4-dioxane (15 mL) at room temperature. The reaction was allowed to stir at room temperature overnight. After 18 hours the reaction was concentrated to 25% of the original volume, resulting in a white precipitate. The precipitate was filtered via Buchner funnel and washed with hexanes (20 mL) to afford a white solid. Yield 45 mg, 41%. MS (APCI) m/z 431.1 (M+H). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.55 (s, 3 H) 2.14 (td, J=12.20, 4.88 Hz, 1 H) 2.35-2.45 (m, 1 H) 3.08 (s, 3 H) 3.72 (td, J=12.05, 4.78 Hz, 1 H) 3.90 (s, 3 H) 4.09 (td, J=11.90, 5.27 Hz, 1 H) 6.46 (dt, J=7.02, 1.85 Hz, 1 H) 6.54 (s, 1 H) 7.03-7.17 (m, 1 H) 7.37 (td, J=8.63, 2.24 Hz, 1 H) 7.72 (d, J=7.22 Hz, 1 H) 9.22 (br. s., 1 H) 11.10 (s, 1H)

1. concentrationAfter 18 hours the reaction was concentrated to 25% of the original volume
2. customresulting in a white precipitate
3. filtrationThe precipitate was filtered via Buchner funnel
4. washwashed with hexanes (20 mL)
5. customto afford a white solid