cobalt(II)salen; tetra-n-butylammonium perchlorate in N,N-dimethyl-formamide T=5°C; P=760 Torr; Electrochemical reaction;

1: 51.6 percent / triphenyl phosphine; sodium acetate; triethylbenzylammonium chloride / Pd(PPh3)2Cl2 / 20 h / 90 °C 2: 40 percent / aq. KOH / 1 h / Heating View Scheme