反应详情

To a round, bottom flask was added 3-amino-4-fluoroacetophenone (Method 64, 1 g, 6.54 mmol), cyclopropyl carboxylic acid (0.62 ml, 7.84 mmol), HATu (2.5 g (6.57 mmol), and DIEA (2.3 ml, 13.08 mmol) in DMF (15 ml). The reaction mixture was allowed to stir at room temperature for 16 hours. The reaction mixture was quenched with water and partitioned with EtOAc. The layers were cut, followed by an additional wash of the aqueous with EtOAc. The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo. The crude residue obtained was then purified by silica gel chromatography (Biotage Horizon System) using a gradient elution of 5-15% EtOAc in DCM to give 458 mg of the title compound (32% isolated yield). 1H NMR: 10.16 (s, 1H) 8.53 (dd, J=7.91, 2.26 Hz, 1H) 7.67-7.82 (m, 1H) 7.40 (dd, J=10.55, 8.67 Hz, 1H) 2.54 (s, 3H) 1.95-2.09 (m, 1H) 0.78-0.88 (m, 4H).

1. customThe reaction mixture was quenched with water
2. custompartitioned with EtOAc
3. washan additional wash of the aqueous with EtOAc
4. dry with materialThe combined organic layers were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe crude residue obtained
8. customwas then purified by silica gel chromatography (Biotage Horizon System)
9. washa gradient elution of 5-15% EtOAc in DCM