Potassium Carbonate → HCID 118075445, compound

Participants

Reaction Conditions

Reaction Steps

A 50-mL round-bottom flask was purged and maintained with an inert atmosphere of nitrogen and charged with 1-[(2S)-6-bromo-5-(2,2-dichloroethoxy)-2-methyl-1,2,3,4-tetrahydroquinolin-1-yl]ethan-1-one (43 mg, 0.11 mmol), 1-cyclopropyl-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (40 mg, 0.17 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (8 mg, 0.01 mmol), potassium carbonate (31 mg, 0.22 mmol), 1,4-dioxane (24 mL), and water (4 mL). The resulting mixture stirred for 15 h at 100° C. in an oil bath. After cooling to room temperature, the reaction mixture was passed a short pad of celite and concentrated under vacuum. The residue was purified by preparative thin layer chromatography (eluting with dichloromethane/methanol, 50:1 then 20:1) to afford (S,E)-1-(5-(2-chlorovinyloxy)-6-(1-cyclopropyl-1H-pyrazol-4-yl)-2-methyl-3,4-dihydroquinolin-1(2H)-yl)ethanone (12 mg, 26%) as a white solid. 1H NMR (300 MHz, CD3OD) δ ppm 1.05-1.15 (m, 7H), 1.35-1.58 (m, 1H), 2.21 (s, 3H), 2.25-2.50 (m, 2H), 2.80-2.93 (m, 1H), 3.65-3.75 (m, 1H), 4.61 (s, 1H), 4.70-4.85 (m, 1H), 5.52 (d, J=4.20 Hz, 1H), 6.52 (d, J=4.20 Hz, 1H), 7.15-7.25 (m, 1H), 7.54 (d, J=8.40 Hz, 1H), 7.89 (s, 1H), 8.07 (s, 1H). MS (ESI, pos. ion) m/z 372 [M+H]+.

Provenance & Evidence