N-BOC-ethylenediamine → HCID 57500598, compound

Participants

Reaction Steps

Hydroxybenzotriazole (3.55 g) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (4.45 g) were added to a solution of 1,3-dimethyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid (4.00 g) in N,N-dimethylformamide (40 ml) with ice cooling. The mixture was stirred for 30 minutes at room temperature, and then t-butyl (2-aminoethyl)carbamate (3.65 ml) was added thereto and stirred overnight at room temperature. The reaction mixture was concentrated under reduced pressure, and ethyl acetate and water were added to the residue. The organic phase was washed with 10% citric acid solution, 4% sodium bicarbonate solution and a saturated saline solution. The product was dried under sodium sulfate anhydrous and concentrated under reduced pressure to give t-butyl {2-[(1,3-dimethyl-1H-pyrazolo[3,4-b]pyridine-5-carbonyl)amino]ethyl}carbamate (4.02 g, Y.:57%) as colorless crystals.

Provenance & Evidence