反应详情

To a solution of (2R)-2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)butanoic acid (20.14 mg, 0.099 mmol) in N,N-dimethylformamide (1.5 mL) DIPEA (0.029 mL, 0.165 mmol) and TBTU (33.9 mg, 0.106 mmol) were added. The mixture reaction was stirred during 15 minutes at room temperature, then 2-[(3,3-dimethyl-2,3-dihydro-1-benzofuran-4-yl)oxy]-5-pyrimidinamine (Intermediate 65, 17 mg) was added. The reaction mixture was stirred during 48 hours at room temperature. The mixture was diluted with ethyl acetate (5 ml) and washed with brine (3×5 ml). The organic layer was separated, dried over sodium sulphate, filtered and evaporated. The residue was purified by silica gel flash chromatography using a 10 g-SNAP column and cyclohexane/ethyl acetate from 100/0 to 40/60 as eluent to afford the title compound as a white solid (4.4 mg).

1. customThe mixture reaction
2. stirringThe reaction mixture was stirred during 48 hours at room temperature
3. washwashed with brine (3×5 ml)
4. customThe organic layer was separated
5. dry with materialdried over sodium sulphate
6. filtrationfiltered
7. customevaporated
8. customThe residue was purified by silica gel flash chromatography