Reaction Steps
A suspension of 2-amino-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-3-(tetrahydro-pyran-4-yl)-propionamide hydrochloride salt (766 mg, 2.0 mmol) in acetonitrile (15 mL) was treated with N,N-diisopropylethylamine (1.0 mL) and the resulting mixture stirred at 60° C. for 15 min. After this time N,N-diisopropylethylamine (0.5 mL) and a solution of (E)-4-bromo-3-(3-ethoxy-2,6-difluoro-phenoxy)-but-2-enoic acid ethyl ester (prepared in Example 116, 705 mg, 1.93 mmol) in acetonitrile (10 mL) were added and the resulting solution refluxed for 20 h. The resulting mixture was concentrated in vacuo and the residue partitioned between ethyl acetate and water. The layers were separated and the organic layer was dried over anhydrous sodium sulfate. The mixture was filtered and concentrated in vacuo and the residue dissolved in tetrahydrofuran (4 mL) and transferred to an Emrys Optimizer microwave tube and microwaved at 160° C. for 6 h. The mixture was concentrated in vacuo and the residue was purified by ISCO flash chromatography (RediSep silica 40 g, 5% to 80% (10% methanol/dichloromethane)/hexanes) which afforded 2-[4-(3-ethoxy-2,6-difluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-3-(tetrahydro-pyran-4-yl)-propionamide (148 mg, 14%): HR-ES-MS (m/z) calculated for C27H34F2N4O6 [M+H]+ 549.2519, observed 549.2520; 1H NMR (400 MHz, DMSO-d6) δ ppm 1.05 (br. s., 3H), 1.07 (br. s., 3H), 1.13-1.31 (m, 3H), 1.35 (t, J=6.9 Hz, 3H), 1.55-1.74 (m, 3H), 1.75-1.88 (m, 1H), 3.09-3.31 (m, 2H), 3.82 (br. s., 2H), 3.90 (s, 2H), 4.14 (q, J=6.9 Hz, 2H), 4.32 (d, J=18.6 Hz, 1H), 4.66 (br. s., 1H), 4.64 (d, J=18.6 Hz, 1H), 4.91 (dd, J=10.8, 4.4 Hz, 1H), 5.06 (s, 1H), 6.45 (d, J=1.8 Hz, 1H), 7.17 (td, J=9.4, 4.9 Hz, 1H), 7.27 (td, J=9.4, 1.3 Hz, 1H), 7.54 (d, J=1.8 Hz, 1H), 10.81 (s, 1H).
