Potassium Carbonate → 2-(4-(3-Cyanoquinolin-7-yl)-2-fluorophenyl)-2-(4-cyclopropyl-3-oxo-1-oxa-4,9-diazaspiro[5.5]undecan-9-yl)acetamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(4-bromo-2-fluorophenyl)-2-(4-cyclopropyl-3-oxo-1-oxa-4,9-diazaspiro[5.5]undecan-9-yl)acetamide (125 mg, 0.28 mmol) and 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (72 mg, 0.28 mmol) in 1,4-dioxane (2.0 mL) was added potassium acetate (61 mg, 0.63 mmol) and PdCl2(dppf)-CH2Cl2 adduct (23 mg, 0.03 mmol). The reaction mixture was purged with nitrogen and heated at 120° C. for 4 h. The reaction mixture was cooled and 7-bromoquinoline-3-carbonitrile (66.2 mg, 0.28 mmol) and 2M aq K2CO3 (0.3 mL, 0.6 mmol) were added. The reaction mixture was purged with nitrogen and heated with stirring at 100° C. for 1 h. The cooled reaction mixture was diluted with dichloromethane (60 mL) and salts were filtered away. The organic mixture was filtered through a plug of celite and sodium sulfate and the filtrate was treated with a small amount of Silicycle Si-thiol resin for 30 min. The mixture was filtered and concentrated in vacuo. The residue was purified by reverse phase HPLC (10-70% acetonitrile:water with 0.1% NH4OH) and the appropriate fractions were collected, combined and concentrated in vacuo to give expected product as a racemate (87 mg, 60%). Chiral HPLC was performed on this material in Example 63a. MS(ES)+ m/e 514 [M+H]+; 1H NMR (400 MHz, CD2Cl2) δ ppm 0.56-0.66 (m, 2 H) 0.75-0.87 (m, 2 H) 1.64-1.70 (m, 1 H) 1.72-1.77 (m, 1 H) 1.85-1.97 (m, 2 H) 2.31 (td, J=11.24, 2.53 Hz, 1 H) 2.56-2.61 (m, 1 H) 2.62-2.74 (m, 2 H) 2.77-2.86 (m, 1 H) 3.15 (s, 2 H) 4.00 (d, J=2.02 Hz, 2 H) 4.55 (s, 1 H) 5.65 (d, J=4.29 Hz, 1 H) 7.27 (d, J=4.04 Hz, 1 H) 7.49 (t, J=7.71 Hz, 1 H) 7.56 (d, J=1.77 Hz, 1 H) 7.65 (dd, J=7.96, 1.89 Hz, 1 H) 8.00 (dd, J=8.34, 1.77 Hz, 1 H) 8.06 (d, J=8.34 Hz, 1 H) 8.39-8.47 (m, 1 H) 8.63 (dd, J=2.02, 0.76 Hz, 1 H) 9.10 (d, J=2.27 Hz, 1 H).

Provenance & Evidence