Triethylamine → HCID 67499154, compound

Participants

Reaction Steps

To a mixture of ethyl acetimidate hydrochloride (2.0 g, 16.20 mmol) and triethylamine (3.28 g, 32.4 mmol) in ethanol (40 mL) was added a solution of tert-butyl hydrazinecarboxylate (2.14 g, 16.20 mmol) in ethanol (10 mL) at room temperature. The resulting mixture was stirred at room temperature overnight. Then to the mixture was added a solution of 2-bromo-1-(pyridin-3-yl)ethanone hydrobromide (5.0 g, 17.9 mmol) and triethylamine (4.9 g, 48.6 mmol) in ethanol (20 mL). The reaction mixture was stirred at room temperature for 5 hours then heated to reflux overnight. The solvent was removed under reduced pressure and the residue was purified via silica gel chromatography (dichloromethane: methanol, 10:1) to give the title compound as an orange oil (0.76 g, 17.3%): 1H NMR (300 MHz, CDCl3) δ 8.87 (s, 1H), 8.45 (d, 1H, J=6.3 Hz), 8.43 (s, 1H), 8.05 (d, 1H, J=6.3 Hz), 7.33-7.25 (m, 2H), 2.37 (s, 3H), 1.51 (s, 9H); ESIMS m/z 275 [(M+H)]+.

Provenance & Evidence