反应详情

A solution of 2-ethyl-4-[4-(methylsulfonyl)phenoxy]-1-benzofuran-6-carboxylic acid (300 mg, 0.83 mmol), HATU (476 mg, 1.3 mmol) and DIPEA (162 mg, 1.3 mmol) in DMF (20 mL) was stirred for 1 h. After which 5-methylpyridin-2-amine (108 mg, 1.0 mmol) was added. The resulting mixture was stirred overnight. The reaction was monitored by TLC (petroleum ether/EtOAc 1:1). The mixture was poured into water (30 mL) and extracted with EtOAc (30 mL×3). The organic layer was washed with brine (20 mL×2), dried over Na2SO4 and concentrated. The residue was purified by preparative HPLC to afford the desired product (115.0 mg, 31%) as a white solid. 1H NMR (400 MHz, CDCl3): δ 8.52 (s, 1H), 8.18 (d, 1H), 8.04 (s, 1H), 7.86 (d, 3H), 7.52 (d, 1H), 7.42 (s, 1H), 7.06 (d, 2H), 6.20 (s, 1H), 3.00 (s, 3H), 2.74 (q, 2H), 2.24 (s, 3H), 1.26 (t, 3H); MS (ACPI, pos): 451.2.

1. extractionextracted with EtOAc (30 mL×3)
2. washThe organic layer was washed with brine (20 mL×2)
3. dry with materialdried over Na2SO4
4. concentrationconcentrated
5. customThe residue was purified by preparative HPLC