Potassium Carbonate → Perfluorophenyl 1-(4-cyano-2-methoxyphenyl)isoquinoline-6-sulfonate

Participants

Reaction Steps

A vial was charged with perfluorophenyl 1-chloroisoquinoline-6-sulfonate (see Example 73, Step 1) (210 mg, 0.513 mmol), (4-cyano-2-methoxyphenyl)boronic acid (181 mg, 1.025 mmol), potassium carbonate (213 mg, 1.538 mmol), and Pd(Ph3P)4 (59.2 mg, 0.051 mmol). The vial was flushed with Ar (g), then 1,4-dioxane (1922 μl) and water (641 μl) were added. The vial was sealed and placed in a 50° C. heating bath for 1.5 h. The mixture was diluted with water and extracted with EtOAc (3×). The combined organic extracts were concentrated. The crude product was purified by chromatography on silica gel (40-g column with 0 to 40% EtOAc/Heptane) to give perfluorophenyl 1-(4-cyano-2-methoxyphenyl)isoquinoline-6-sulfonate (172.6 mg, 0.341 mmol, 66.5% yield) as a white foam: 1H NMR (400 MHz, CHLOROFORM-d) δ ppm=8.86 (d, J=5.7 Hz, 1H), 8.61 (d, J=2.0 Hz, 1H), 7.99 (dd, J=2.0, 8.9 Hz, 1H), 7.91-7.82 (m, 2H), 7.61-7.57 (m, 1H), 7.54-7.47 (m, 1H), 7.34 (d, J=1.4 Hz, 1H), 3.77 (s, 3H); m/z (ESI) 507.2 (M+H)+.

Provenance & Evidence