Reaction Steps
A mixture of pentanoic acid [4-(2-chloro-ethoxy)-3-(2-methyl-2H-pyrazol-3-yl)-phenyl]-amide (50 mg, 0.15 mmol), 4-hydroxypiperidine (18 mg, 0.18 mmol), potassium carbonate (31 mg, 0.225 mmol) and catalytic amount of tetrabutyl ammonium iodide in DMF (1 mL) was heated with microwaves at 100° C. for 2.5 hours. The crude was purified by HPLC to provide the title compound as a sticky solid (51 mg, 85%). 1H NMR (DMSO-d6, 400 MHz) δ 0.89 (t, J=7.33 Hz, 3H), 1.30 (guar, J=7.58 Hz, 2H), 1.40-1.48 (m, 1H), 1.54 (quin, J=7.58 Hz, 2H), 1.66-1.82 (m, 2H), 2.28 (t, J=7.33 Hz, 2H), 2.82-2.89 (m, 1H), 3.05-3.09 (m, 2H), 3.19-3.22 (m, 1H), 3.39-3.45 (m, 2H), 3.64 (d, J=2.53 Hz, 3H), 3.85 (s, 1H), 4.11-4.18 (m, 4H), 6.25 (dd, J=2.02, 5.05 Hz, 1H), 7.16 (d, J=9.09 Hz, 1H), 7.45 (dd, J=2.02, 5.31 Hz, 1H), 7.55 (d, J=2.78 Hz, 1H), 7.66 (dd, J=2.53, 9.09 Hz, 1H), 9.23 (s, br, 1H), 9.91 (s, 1H). Exact mass calculated for C22H32N4O3 400.2, found 401.3 (MH+).
