反应详情

To a round bottom flask containing (2R,3S)-2-amino-3-(tert-butoxy)butan-1-ol (1.25 g, 7.75 mmol) and a stir bar was added acetonitrile (50 mL) followed by the addition of 2,4,5-trifluoropyrimidine (1.04 g, 7.75 mmol) and DIEA (4.1 mL, 23.3 mmol). The resulting reaction mixture allowed to stir 1 hr at room temperature. The volatiles were then removed. Reaction mixture was then partitioned between EtOAc and water. Aqueous layer extracted with EtOAc. Organic phases combined, washed with water, brine, dried (Na2SO4), filtered and concentrated to a viscous yellow oil of (2R,3S)-3-(tert-butoxy)-2-((2,5-difluoropyrimidin-4-yl)amino)butan-1-ol (1.56 g, 5.67 mmol, 73% yield). 1H NMR (400 MHz, CDCl3) δ 1.15 (s, 9H) 1.32 (d, J=6.26 Hz, 3H) 3.45 (br. s., 1H) 3.67 (d, J=11.35 Hz, 1H) 3.85-3.92 (m, 1H) 4.27 (d, J=11.74 Hz, 1H) 6.29 (d, J=5.48 Hz, 1H) 7.87 (d, J=2.35 Hz, 1H). LCMS m/z 276.4 (M+H)+, Rt 0.71 min.

1. customThe resulting reaction mixture
2. customThe volatiles were then removed
3. customReaction mixture
4. customwas then partitioned between EtOAc and water
5. extractionAqueous layer extracted with EtOAc
6. washwashed with water, brine
7. dry with materialdried (Na2SO4)
8. filtrationfiltered