反应详情

To a solution of 4-(2-dimethylamino-ethoxy)-3-(2-methyl-2H-pyrazol-3-yl)-phenylamine (26.0 mg, 0.1 mmol) in methylene chloride (1 mL) pyridine (24.3 μL, 0.3 mmol) and 4-nitrophenyl chloroformate (20.2 mg, 0.1 mmol) were added and the mixture was stirred at room temperature for 1 hour. 5-Amino-2,2-difluoro-1,3-benzodioxole (11.6 μL, 0.1 mmol) was added, the reaction mixture stirred at room temperature for 48 hours and concentrated to give an oily residue that was subjected to a purification by flash chromatography (SiO2, CH2Cl2/MeOH gradient elution) to afford Compound 144 as an off-white solid in 14.0% yield. LCMS m/z (%)=460 (M+H, 100). 1H NMR (400 MHz, DMSO-d6) δ: 10.30 (s, 1H), 7.64 (d, J=8.96 Hz, 1H), 7.53 (s, 1H), 7.42 (s, 1H), 7.40-7.34 (m, 4H), 7.13 (d, J=8.92 Hz, 1H), 6.22 (s, 1H), 4.10 (t, J=5.56 Hz, 2H), 3.65 (s, 3H), 3.63 (s, 2H), 2.76-2.65 (m, 2H), 2.22 (s, 6H).

1. stirringthe reaction mixture stirred at room temperature for 48 hours
2. concentrationconcentrated
3. customto give an oily residue that
4. customwas subjected to a purification by flash chromatography (SiO2, CH2Cl2/MeOH gradient elution)