Cesium carbonate → Isopropyl 4-(1-(4-cyano-2-fluorophenyl)-2-oxo-1,2-dihydropyridin-4-yloxy)piperidine-1-carboxylate

Participants

Reaction Steps

Example 188 was prepared according to procedures described in Example 132 substituting tert-butyl 4-(1-(4-cyano-2-fluorophenyl)-2-oxo-1,2-dihydropyridin-4-yloxy)piperidine-1-carboxylate (Example 176) for tert-butyl 4-(2-oxo-1-pyridin-3-yl)-1,2-dihydropyridin-4-yloxy)piperidine-1-carboxylate in Step C and substituting isopropyl carbonochloridate (1 Molar in Toluene, Aldrich) for 2-chloro-5-propylpyrimidine and substituting triethyl amine for cesium carbonate in Step D except that reaction was stirred at room temperature for 20 min and then washed with HCl solution (1 Molar in H2O). The crude solid was purified by flash chromatography (SiO2, 0 to 100% EtOAc in CH2Cl2). 1H NMR (500 MHz, CDCl3) δ ppm 7.49-7.58 (m, 3H), 7.08 (d, J=7.70 Hz, 1H), 6.02 (dd, J=7.70, 2.20 Hz, 1H), 5.93 (d, J=2.20 Hz, 1H), 4.87-4.95 (m, 1H), 4.45-4.49 (m, 1H), 3.69-3.77 (m, 2H), 3.32-3.39 (m, 2H), 1.92-2.00 (m, 2H), 1.72-1.81 (m, 2H), 1.24 (d, J=6.60 Hz, 6H). MS (ESI) 400 (M+H).

Provenance & Evidence