1: dimethyl amine With sodium hydride in N,N-dimethyl-formamide T=20°C; 0.5 h; 2: 5-Chloromethyl-furan-2-carboxylic acid ethyl ester in N,N-dimethyl-formamide 48 h; 3: With sodium hydroxide; water in ethanol T=80°C; 0.666667 h;