Potassium Carbonate → HCID 86687535, compound

Participants

Reaction Steps

A microwave vial was charged with 4-chloro-N-(2,4-dimethoxybenzyl)-N-(thiazol-2-yl)quinazoline-7-sulfonamide (Intermediate KKKK; 0.040 g, 0.084 mmol), (4-fluoro-2-methoxyphenyl)boronic acid (0.021 g, 0.126 mmol), tetrakis(triphenylphosphine)palladium(0) (9.69 mg, 8.39 μmol), and potassium carbonate (0.058 g, 0.419 mmol). Dioxane (0.419 mL) and water (0.140 mL) were added, the vial was flushed with argon and sealed, and microwaved at 100° C. for 30 minutes. The reaction was diluted with ethyl acetate and washed with water. The aqueous layer was extracted with ethyl acetate, and the combined organic layers were dried with sodium sulfate, filtered, and concentrated. The material was purified via column chromatography (12 g silica gel column, gradient elution 0 to 100% EtOAc:Heptane) to afford N-(2,4-dimethoxybenzyl)-4-(4-fluoro-2-methoxyphenyl)-N-(thiazol-2-yl)quinazoline-7-sulfonamide. The material was dissolved in DCM and TFA (0.1 mL, 1.298 mmol) was added. The reaction was stirred overnight at room temperature. The reaction was concentrated and purified via column chromatography (12 g silica gel column, gradient elution 0 to 10% MeOH:DCM) to afford 4-(4-fluoro-2-methoxyphenyl)-N-(thiazol-2-yl)quinazoline-7-sulfonamide as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm=13.01 (br. s., 1H), 9.45 (s, 1H), 8.38 (br. s., 1H), 8.06-7.76 (m, 2H), 7.49 (t, J=7.2 Hz, 1H), 7.31 (d, J=4.1 Hz, 1H), 7.21 (d, J=11.2 Hz, 1H), 7.01 (t, J=7.1 Hz, 1H), 6.90 (d, J=4.3 Hz, 1H), 3.70 (br. s., 3H). m/z (ESI) 417.2 (M+H)+.

Provenance & Evidence