Potassium Carbonate → 1-(2-chloro-4-(trifluoromethyl)phenyl)-N-(1,2,4-thiadiazol-5-yl)isoquinoline-6-sulfonamide

Participants

Reaction Conditions

Reaction Steps

A pressure vessel was charged with (2-chloro-4-(trifluoromethyl)phenyl)boronic acid (56.5 mg, 0.252 mmol), potassium carbonate (145 mg, 1.048 mmol), 1-chloro-N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)isoquinoline-6-sulfonamide (100 mg, 0.210 mmol), tetrakis(triphenylphosphine)palladium(0) (24.23 mg, 0.021 mmol), dioxane (1398 μl) and water (699 μl). The reaction vessel was swept with nitrogen, sealed with a cap and then heated in a microwave at 100° C. for 30 minutes. The mixture was cooled to room temperature. The organic layer was separated by pipet and then purified by reverse phase HPLC (Column: Gemini 150×30 mm, 5 μm, Phenomenex, Torrance, Calif., Flow rate: 40 mL/min, Mobile phase: 0.1% TFA in ACN and water). The fractions containing pure product were dried under a vacuum to provide 1-(2-chloro-4-(trifluoromethyl)phenyl)-N-(1,2,4-thiadiazol-5-yl)isoquinoline-6-sulfonamide (22 mg, 0.047 mmol) as a white solid. 1H NMR (500 MHz, DMSO-d6) δ ppm 3.57 (br. s., 1H) 3.63-3.80 (m, 1H) 7.70 (d, J=8.82 Hz, 1H) 7.79 (d, J=7.90 Hz, 1H) 7.86-7.96 (m, 1H) 8.12 (s, 1H) 8.25 (d, J=5.61 Hz, 1H) 8.47 (s, 1H) 8.65 (d, J=1.49 Hz, 1H) 8.77 (d, J=5.73 Hz, 1H); m/z (ESI) 471.0 (M+H)+.

Provenance & Evidence