Methyl chloroformate → [5-(3-Isopropyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-carbamic acid methyl ester

Participants

Reaction Steps

To a solution of 5-[3-(propan-2-yl)phenyl][1,2,4]triazolo[1,5-a]pyridin-2-amine (23.6 mg, 0.0935 mmol, 1 equiv) in pyridine was added methyl chloroformate (36.1 uL, 0.468 mmol, 5.00 equiv) at 24° C. After 3 h, the reaction mixture was concentrated in vacuo. The resulting residue was partitioned between saturated aqueous sodium bicarbonate solution (5 mL) and ethyl acetate (5 mL). The aqueous layer was extracted with ethyl acetate (2×5 mL). The combined organic extracts were dried over magnesium sulfate, filtered, and concentrated. Purification by preparative HPLC provided a white solid (17.7 mg, 61%). LCMS (ESI) m/z: 311.2. 1H NMR (500 MHz, DMSO-d6), δ: 10.45 (s, 1H), 7.88 (m, 1H), 7.81 (m, 1H), 7.65-7.72 (m, 2H), 7.48 (t, J=7.6 Hz, 1H), 7.42 (m, 1H), 7.28 (dd, J=7.0, 1.6 Hz, 1H), 3.67 (s, 3H), 3.00 (m, 1H), 1.28 (d, J=6.9 Hz, 6H).

Provenance & Evidence