Bromide ion → HCID 13217732, compound

Participants

Reaction Steps

To a solution of 3.3 parts of diethyl (3-methoxycarbonylthienyl)aminomethylenemalonate in a mixture of 20 parts by volume of chloroform and 4 parts by volume of pyridine, 0.6 part by volume of bromide is added dropwise. The solution is further stirred at room temperature for 15 minutes, after which the reaction mixture is washed with dilute hydrochloric acid, an aqueous sodium hydrogen carbonate solution and water, followed by drying over Na2SO4. The solvent is distilled off to give diethyl (5-bromo-3-methoxycarbonylthienyl)aminomethylenemalonate. Recrystallization from ethanol gives light-yellowish needles melting at 129°-130°C.

Provenance & Evidence