反应详情

To a solution containing 1-(pyrimidin-2-yl)cyclopropanamine hydrochloride (0.008 g, 0.05 mmol), diisopropylethylamine (0.05 mL, 0.28 mmol), 5-(2-(4-fluorophenyl)-3-(methylcarbamoyl)pyrazolo[1,5-b]pyridazin-5-yl)-2-methoxy-4-methylbenzoic acid (0.015 g, 0.04 mmol) and DMF (0.23 mL) was added HATU (0.026 g, 0.07 mmol) in one portion. The solution was maintained at room temperature for 1 h. The product was purified using preparative HPLC (Waters-Xbridge, 50×100 mm, 5 micron, C18 column; 0.1M ammonium acetate, 0-100% B (B=5% H2O/CH3CN)/A (A=95% H2O/CH3CN), 15 min. gradient) to afford 2-(4-fluorophenyl)-5-(4-methoxy-2-methyl-5-(1-(pyrimidin-2-yl)cyclopropylcarbamoyl)phenyl)-N-methylpyrazolo[1,5-b]pyridazine-3-carboxamide as a white solid. Preparative HPLC retention time: 10.5 min. 1H NMR (400 MHz, CHLOROFORM-d) δ 8.72-8.58 (m, 4H), 8.41 (d, J=2.3 Hz, 1H), 8.23 (s, 1H), 7.83-7.74 (m, 2H), 7.26-7.20 (m, 1H), 7.10-7.03 (m, 1H), 6.98 (s, 1H), 5.66 (br. s., 1H), 4.09 (s, 3H), 2.88 (d, J=4.8 Hz, 3H), 2.46 (s, 3H), 1.88-1.81 (m, 2H), 1.59-1.52 (m, 2H). LCMS retention time: 2.057 min. LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Phenomenex-Luna, 3 micron, C18, 2.0×50 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 1.0 mL/min, a gradient of 100% solvent A/0% solvent B to 0% solvent A/100% solvent B, a gradient time of 2 min, a hold time of 1 min, and an analysis time of 3 min where solvent A was 10% methanol/90% H2O/10 mM TFA and solvent B was 10% H2O/90% methanol/10 mM TFA. MS data was determined using a Micromass Platform for LC in electrospray mode. m/z 552 (MH+).

1. customThe product was purified