1: With pyridine; bromine in chloroform T=25°C; 2: With water in chloroform Cooling with ice;

1: ethyl 4-bromo-5-methylfuran-2-carboxylate With lithium aluminium tetrahydride in diethyl ether T=10°C; 2: With pyridine; thionyl chloride T=5 - 15°C; 3: diethyl sodium phosphite in benzene T=80°C; Michaelis-Becker reaction; 6 h;

in benzene T=80°C; 5 h;

sodium 1) benzene, 2) benzene, 80 deg C, 3 h; Yield given. Multistep reaction;

AlCl3, aluminium chloride; bromine in chloroform T=15 - 20°C;