反应详情

3-((8-chloro-4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoic acid (118) (200 mg, 0.64 mmol) and 4-ethoxypiperidine were added to DMF (5 mL), to this was added N-ethyl-N-isopropylpropan-2-amine (0.170 mL, 0.95 mmol) and then HBTU (362 mg, 0.95 mmol). The solvent was removed and the crude product dissolved in acetonitrile and purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the desired material as a white solid (111 mg, 41.0% yield); 1H NMR (400.132 MHz, DMSO) δ 1.11 (3H, t), 1.17-1.46 (2H, m), 1.58-1.92 (2H, m), 2.97-3.42 (4H, m), 3.42-3.55 (3H, m), 4.68 (2H, s), 7.13 (1H, s), 7.21 (2H, t), 7.35 (1H, t), 7.81 (1H, t), 7.94-7.99 (1H, m), 8.32-8.36 (1H, m), 12.91 (1H, s); m/z (LC-MS, ESI+), RT=1.96 (M+H 426.7)

1. customThe solvent was removed
2. dissolutionthe crude product dissolved in acetonitrile
3. custompurified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length)
4. additionFractions containing the desired compound
5. customwere evaporated to dryness