1: trichloroacetonitrile With tert.-butyl lithium; triphenylphosphine in tetrahydrofuran T=20°C; 2: thiophene-2-carbaldehyde With tert.-butyl lithium in tetrahydrofuran T=-78°C; Wittig reaction; 1 h;

tert.-butylhydroperoxide; [(Cu(OTf))2(μ-toluene)] in decane T=80°C; 10 h; Schlenk techniqueInert atmosphere;

T=225 - 230°C; P=2 Torr;

1: 2) triethylamine / 1) toluene, 1 h, 2) toluene, overnight 2: 73 percent / 225 - 230 °C / 2 Torr View Scheme