1: N,N-dimethyl-formamide With oxalyl dichloride in dichloromethane T=0°C; 0.6 h; 2: furan-3-methanol in dichloromethane T=-40°C; 0.333333 h; Further stages.;

in methanol T=20 - 64°C; 18 h; Inert atmosphereReflux;