反应详情

To the product of Step 1 (216 mg) dissolved in acetonitrile (4 mL) was added Et3N (0.26 mL), followed by 4-fluorophenylacetic acid (102 mg). After 1.5 h at room temperature 0.23 nL of DBU was added. The reaction mixture was stirred for another 45 min and then treated with 5 mL of IN HCl. The product was extracted with EtOAc, dried over Na2S04 and concentrated. The residue was purified by flash chromatography (40% EtOAc in hexane) to yield 150 mg of the title compound as a solid. 1H NMR (CD3COCD3) d 3.15 (3H, s), 5.36 (3H, s), 7.18 (2H, J=8.9 Hz, t), 7.46 (2H, m), 7.7 (2H, J=8.65 Hz, d), 7.97 (2H, J=8.68, d).

1. extractionThe product was extracted with EtOAc
2. customdried over Na2S04
3. concentrationconcentrated
4. customThe residue was purified by flash chromatography (40% EtOAc in hexane)