1: in tetrahydrofuran T=-20 - 25°C; Inert atmosphere; 2: With methanol; potassium carbonate in tetrahydrofuran T=25°C; 12 h; Inert atmosphere;

1: carbon monoxide With 1,1'-bis-(diphenylphosphino)ferrocene; [RhCl(η2:η2-cycloocta-1,5-diene)]2 in tetrahydrofuran T=20°C; P=760.051 Torr; 0.166667 h; 2: thiophen-2-ylzinc iodide With ethylene dibromide in tetrahydrofuran T=60°C; 3 h;