HCID 178509964, compound → 3,5-Dichloro-4-(7-chloropyrazolo[4,3-c]pyridin-2-yl)benzonitrile

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Reaction Steps

A suspension of 4-{[1-(4-azido-5-chloropyridin-3-yl)meth-(E)-ylidene]amino}-3,5-dichlorobenzonitrile (3.8 g, 10.95 mmol) in toluene (45 mL) was heated to reflux for 18 hours and then cooled to room temperature. The precipitated solid was removed by filtration and washed sequentially with toluene, ethyl acetate and DCM. The filtrate was concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (0-100% ethyl acetate in cyclohexane) and then triturated with diethyl ether to afford the title compound as an off-white solid (2.5 g, 71% yield). 1H NMR (400 MHz, CDCl3): δ 9.30 (s, 1H), 8.46 (s, 1H), 8.42 (s, 1H), 7.86 (s, 2H).

Provenance & Evidence