Reaction Steps
To a solution of 5-chloro-2-ethyl-3-[ethyl(oxan-4-yl)amino]benzoic acid (191 mg, 0.61 mmol) in DMF (3 ml) at 0° C. was added HATU (280 mg, 0.74 mmol) followed by DIPEA (213 μl, 1.26 mmol) and 3-(aminomethyl)-4,6-dimethyl-1,2-dihydropyridin-2-one (89%, 115 mg, 0.67 mmol). The reaction was stirred at room temperature for 3 h after which the reaction was poured onto deionized water (50 ml) and the resultant solid was filtered and washed with water. The aqueous phase was washed with DCM (3×50 ml), the combined organics were washed with brine (30 m), dried with MgSO4, filtered and evaporated to give an oil. The solid and oil were combined an purified using a 10 g isolate column eluting with 0% to 3% MeOH in DCM and evaporated followed by purification using a 10 g Isolute eluting with 0% to 3% MeOH in EtOAc to afford the title compound as an off-white solid (234 mg, 79%). LC-MS 92%, 1.78 min (3.5 minute LC-MS method), m/z=446.2/448. To a stirred solution of 5-chloro-N-[(4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl]-2-ethyl-3-[ethyl(oxan-4-yl)amino]benzamide (117 mg, 0.26 mmol) in a degassed mixture of diglyme (4 ml) and MeOH (2 ml) which was bubbled with nitrogen gas was added 2′-(dicyclohexylphosphanyl)-N,N-dimethylbiphenyl-2-amine (21 mg, 0.05 mmol), palladium diacetate (5.89 mg, 0.03 mmol), caesium fluoride (120 mg, 0.79 mmol) and 4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl]morpholine (119 mg, 0.39 mmol). The nitrogen bubbling continued for 10 min and then the reaction was heated to 70° C. for 16 h after which time further 4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl]morpholine (119 mg, 0.39 mmol) was added and heating continued for 6 h. The reaction was then cooled to room temperature and filtered through Keiselguhr, the cake being washed with MeOH. Distilled water (20 ml) was added to the filtrate which was then extracted with EtOAc (3×50 ml), the combined organics were then washed with brine (2×50 ml), dried with MgSO4, filtered and evaporated. The resultant residue was purified using a 25 g Isolute column eluting with a gradient of 0% to 10% MeOH in DCM to afford the title compound as a pale yellow solid (32 mg, 21%). LC-MS 99%, 2.72 min (7 minute LC-MS method), m/z=294.3 (M+H/2), 1H NMR (500 MHz, Acetone-d6) δ 10.80 (s, 1H), 7.60-7.54 (m, 3H), 7.51 (s, 1H), 7.39 (d, J=7.9 Hz, 2H), 7.36 (d, J=1.4 Hz, 1H), 5.92 (s, 1H), 4.45 (d, J=5.6 Hz, 2H), 3.88 (d, J=8.0 Hz, 2H), 3.66-3.56 (m, 4H), 3.51 (s, 2H), 3.29 (t, J=11.2 Hz, 2H), 3.17 (q, J=7.0 Hz, 2H), 3.09 (t, J=11.2 Hz, 1H), 2.98 (q, J=7.4 Hz, 2H), 2.41 (s, 4H), 2.36 (s, 3H), 2.22 (s, 3H), 1.76 (d, J=11.2 Hz, 2H), 1.65-1.56 (m, 2H), 1.08 (t, J=7.4 Hz, 3H), 0.91 (t, J=7.0 Hz, 3H).
