Sodium Bicarbonate → 2-Aminocarbonylamino-6-(4-hydroxymethylpyridin-2-yl)indole-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

A solution mixture of 2-aminocarbonylamino-3-carbamoylindole-6-boronic acid pinacol ester (Compound 6-1, 90 mg, 0.26 mmol), sodium hydrogen carbonate (55 mg, 0.65 mmol), 2-bromopyridine-4-methanol (58 mg, 0.31 mmol) and tetrakis(triphenylphosphine)palladium (0) (15 mg, 0.013 mmol) in water-1,4-dioxane (1:3, 15 mL) was stirred at 100° C. for 6 hours. Brine (5 mL) was added to the reaction mixture, and the whole was extracted with ethyl acetate (5 mL). The organic layer was dried over anhydrous magnesium sulfate, and was filtered throught Celite® pad. After the solvent was evaporated under reduced pressure, the resultant solid was washed with ethanol (2 mL), and dried under reduced pressure to give the title compound (20 mg) as a brown solid (yield 23%).

Provenance & Evidence