反应详情

To a solution of 1-[3-(4-chloro-2-methyl-2H-pyrazol-3-yl)-4-hydroxy-phenyl]-3-(2,4-difluoro-phenyl)-urea (0.35 g, 0.09 mmol) in anhydrous THF (2 mL), triphenyl phosphine (70.8 mg, 0.27 mmol) and 1-(2-hydroxyethyl)-pyrrolidine (0.032 mL, 0.27 mmol) were added followed by dropwise addition of diisopropyl azodicarboxylate (DIAD) (0.052 mL, 0.27 mmol). The reaction mixture was stirred at room temperature for 2 hours, concentrated to give a crude product that was subjected to purification by preparative HPLC. The proper fractions were collected, neutralized with 1N NaOH and extracted with EtOAc four times. The solution was evaporated under reduced pressure to afford Compound 13 as an off-white solid in 52.8% yield. LCMS m/z (%)=476 (M+H35Cl, 100), 478 (M+H37Cl, 40). 1H NMR (400 MHz, DMSO-d6) δ: 9.10 (s, 1H), 8.55 (s, 1H), 8.17-8.09 (m, 1H), 7.69 (s, 1H), 7.61 (dd, J=8.97 and 2.72 Hz, 1H), 7.47 (d, J=2.70 Hz, 1H), 7.43-7.36 (m, 1H), 7.26 (d, J=9.04 Hz, 1H), 7.16-7.09 (m, 1H), 4.25-4.08 (m, 2H), 3.73 (s, 3H), 2.58-2.45 (m, 2H), 2.45-2.29 (m, 4H), 1.75-1.69 (m, 4H).

1. concentrationconcentrated
2. customto give a crude product that
3. customwas subjected to purification by preparative HPLC
4. customThe proper fractions were collected
5. extractionextracted with EtOAc four times
6. customThe solution was evaporated under reduced pressure