反应详情

To a stirred solution of 6-chloro-4-(isopropylamino)nicotinic acid (9) (1.3 g, 6.06 mmol) in DMF (25 mL), methyl 2-amino-3-hydroxypropanoate (12.11 mmol) and DIPEA (18.17 mmol) were added followed by the addition of HATU (30.3 mmol) to the reaction mixture and stirred at room temperature for 2 h. DMF was removed under reduced pressure. The residue obtained was diluted with EtOAC and washed with water and 10% NaHCO3 solution. The organic layer was collected, dried over Na2SO4, filtered and concentrated. The crude material obtained was purified by flash chromatography using silica gel and EtOAC:pet ether as eluent to afford the title compound, methyl 2-(6-chloro-4-(isopropylamino)nicotinamido)-3-hydroxypropanoate. LC/MS: ZORBAX SB C18, 4.6×50 mm, 5 μm; Solvent A=10% MeOH: 90% H2O: 0.1% TFA; Solvent B=90% MeOH: 10% H2O: 0.1% TFA; gradient 0-100% B over 2 min (3 min run time); retention time: 1.312 min; LCMS (ES-API), m/z 316.0 (M+H).

1. customDMF was removed under reduced pressure
2. customThe residue obtained
3. additionwas diluted with EtOAC
4. washwashed with water and 10% NaHCO3 solution
5. customThe organic layer was collected
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe crude material obtained
10. customwas purified by flash chromatography