1: 3,3'-(thiophene-3,4-diylbis(sulfanediyl))dipropanenitrile With cesium hydroxide in methanol; N,N-dimethyl-formamide T=0°C; 0.0833333 h; 2: ethylene dibromide in methanol; N,N-dimethyl-formamide T=0 - 20°C; 1.33333 h; Further stages.;