1-Hydroxybenzotriazole → HCID 178438024, compound

Participants

Reaction Steps

To a suspension of 3-ethyl-6-(3-fluoro-4-hydroxy-phenyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid (0.25 g, 0.83 mmol), tert-butyl piperazine-1-carboxylate (0.17 g, 0.91 mmol), 1-hydroxybenzotriazole (0.11 g, 0.83 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.16 g, 0.83 mmol) in anhydrous tetrahydrofurane (5 ml) was added dry N,N-dimethylacetamide (2 ml). The reaction mixture was stirred at room temperature under nitrogen overnight. A solution of saturated sodium hydrogen carbonate was then added, the resulting precipitate was filtered off to afford the title compound (0.25 g, 66%) as a beige solid.

Provenance & Evidence