Pyridine → HCID 90451417, compound

Participants

Reaction Steps

To a suspension of 3-[6-bromo-1H-imidazo[4,5-b]pyridin-2-yl]-4-chloroaniline (I-2b) (1 g, 3.08 mmol, 1.00 equiv) in DMF (10 mL) at 0° C. was added 0.5 ml of pyridine followed by isopropyl chloroformate (solution 1M in toluene) (3.85 ml, 3.85 mmol, 1.25 equiv). The reaction mixture was stirred overnight at room temperature and then quenched by the addition of water. The resulting mixture was extracted with ethyl acetate and the combined organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was purified by flash chromatography (0 to 100% Ethyl acetate/Hexanes) to afford the title compound I-11. 1H NMR (400 MHz, DMSO) δ 9.95 (s, 1H), 8.49 (s, 1H), 8.34 (s, 1H), 8.02 (s, 1H), 7.63 (s, 1H), 7.57 (d, J=8.8, 1H), 4.97 4.80 (m, 1H), 1.26 (d, J=6.2, 6H); MS M/Z=409.0 (M+1). RT=1.77: Method B.

Provenance & Evidence