Potassium Carbonate → HCID 86687644, compound

Participants

Reaction Steps

A round-bottom flask was charged with perfluorophenyl 1-chloroisoquinoline-6-sulfonate (see EXAMPLE 73, STEP 1, 4.40 g, 10.74 mmol), (3′,5′-difluoro-3-methoxy-[1,1′-biphenyl]-4-yl)boronic acid (INTERMEDIATE JJJJJ; 3.40 g, 12.89 mmol), potassium carbonate (4.45 g, 32.2 mmol), and Pd(Ph3P)4 (1.241 g, 1.074 mmol). The flask was flushed with Ar (g), then 1,4-dioxane (40.3 ml) and water (13.42 ml) were added in sequence. The flask was fitted with a reflux condenser and lowered into a 50° C. heating bath for 1 h. The mixture was diluted with water and extracted with EtOAc (2×). The combined organic extracts were dried over sodium sulfate, filtered, and concentrated. TLC showed two major spots. The residue was purified by chromatography on silica gel (100-g SNAP Ultra column, 0-50% EtOAc/Heptane). Fractions containing the desired product were combined and concentrated to give perfluorophenyl 1-(3′,5′-difluoro-3-methoxy-[1,1′-biphenyl]-4-yl)isoquinoline-6-sulfonate (4.179 g, 7.04 mmol, 65.6% yield) as an off-white solid. 1H NMR (400 MHz, DMSO-d6) δ=8.93 (d, J=1.6 Hz, 1H), 8.84 (d, J=5.6 Hz, 1H), 8.20 (d, J=5.7 Hz, 1H), 8.07 (dd, J=1.9, 9.0 Hz, 1H), 7.95 (d, J=8.9 Hz, 1H), 7.70-7.62 (m, 2H), 7.59-7.50 (m, 3H), 7.36-7.27 (m, 1H), 3.79 (s, 3H). m/z (ESI) 594.0 (M+H)+.

Provenance & Evidence