morpholine; 3,3'-Dimercapto-2,2'-bi(benzolt;bgt;thien); methyl iodide in toluene 1.) 50-60 deg C, 12 h, 2.) 2 h;

1: zinc-powder; aqueous hydrochloric acid 2: aq. NaOH solution 3: phosphorus (V)-oxide; benzene 4: selenium / 300 °C View Scheme

1: 80 percent / 1.) 3,3'-dimercapto-2,2'-bi(benzo<b>thien), morpholine, 2.) MeI / toluene / 1.) 50-60 deg C, 12 h, 2.) 2 h 2: 53 percent / Cu / 0.75 h / 180 - 200 °C View Scheme