1: With AlCl3, aluminium chloride; oxalyl dichloride in dichloromethane T=0 - 20°C; 2.33333 h; 2: With methanol in dichloromethane T=0°C; 3: With potassium carbonate in methanol T=20°C; 16 h;

1: 6-hydroxy-2-methyl-benzofuran-3-carboxylic acid With 1,1'-carbonyldiimidazole in 2-MeTHF T=20 - 25°C; 0.5 h; 2: methylamine in 2-MeTHF; water T=-15 - 25°C; 2 h;