反应详情

A solution of 3-{5-amino-6-[(methylamino)carbonyl]pyrazin-2-yl}benzoic acid (0.10 g, 0.37 mmol), HOBt (0.055 g, 0.41 mmol) and HBTU (0.15 g, 0.41 mmol) in DMF (1.2 mL) was stirred at r.t. for 10 min. A solution of [4-(aminomethyl)phenyl]amine (0.050 mL, 0.44 mmol) in DMF (1.0 mL) was added and the resulting solution was stirred for 12 h at r.t. The solution was concentrated in vacuo and the crude mixture was partitioned between EtOAc (100 mL) and brine (50 mL). The organic layer was washed with brine (2×50 mL) and the organic layer was dried (Na2SO4), filtered and concentrated in vacuo. The residue was purified via column chromatography (SiO2, 5% MeOH/CH2Cl2) and trituration of the product gave 0.035 g (39% yield) of product: 1H NMR (400 MHz, d6-DMSO): 8.95 (t, 1H), 8.91 (s, 1H), 8.84 (m, 1H), 8.50 (m, 1H), 8.37 (dt, 1H), 7.87 (dt, 1H), 7.56 (t, 1H), 7.01 (d, 2H), 6.52 (m, 2H), 4.97 (s, 2H), 4.35 (d, 2H), 2.85 (d, 3H); MS (EI) for C20H20N6O2: 377 (MH+).

1. concentrationThe solution was concentrated in vacuo
2. customthe crude mixture was partitioned between EtOAc (100 mL) and brine (50 mL)
3. washThe organic layer was washed with brine (2×50 mL)
4. dry with materialthe organic layer was dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified via column chromatography (SiO2, 5% MeOH/CH2Cl2) and trituration of the product