1: α-cyanoacetic acid methyl ester With 1,8-diazabicyclo[5.4.0]undec-7-ene in N,N-dimethyl-formamide T=10 - 50°C; 0.25 h; 2: 1,3-dibromo-propane With 1,8-diazabicyclo[5.4.0]undec-7-ene in N,N-dimethyl-formamide T=-10 - 70°C; 0.75 h;