Ethylene carbonate → HCID 58204827, compound

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Reaction Steps

A mixture of 0.856 g (4.00 mmol) of 2,6-dichloro-3-(1H-imidazol-2-yl)pyridine, 704 mg (8.00 mmol) of ethylene carbonate and 2930 mg (9.00 mmol) of cesium carbonate was heated in 25.0 ml of N,N-dimethylformamide for 13 hours at 90° C. The mixture was filtered, the filtrate concentrated in high vacuum, the residue purified on 10 g of silica column eluting with 80% of ethyl acetate in heptane to give 9-chloro-5,6-dihydroimidazo[1,2-d]pyrido[3,2-f][1,4]oxazepine. Yield 0.359 g (41%). M/z 222.0, calc. 221.04. 1H NMR (500 MHz, CDCl3) δ 8.84 (d, J=8.2, 1H), 7.18 (s, 1H), 7.15 (d, J=8.2, 1H), 7.02 (s, 1H), 4.63-4.57 (m, 2H), 4.47-4.41 (m, 2H)

Provenance & Evidence