Bromine → HCID 131733707, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of compound methyl 3-cyanothiophen-2-ylcarbamate (11.5 g, 63 mmol) in acetic acid (500 mL) was added bromine (12 g, 75 mmol) at room temperature. The solution was heated at 60° C. with stifling for 1 hour and then concentrated and treated with water (500 mL). It was extracted with ethyl acetate (3×300 mL) and the combined extracts were dried over sodium sulfate and concentrated to give 14 g (89%) of methyl 5-bromo-3-cyanothiophen-2-ylcarbamate as a solid. 1H NMR 400 MHz CDCl3 δ 3.89 (s, 3H), 6.90 (s, 1H), 8.05 (s, 1H).

Provenance & Evidence