copper acetylacetonate in benzene 1 h; Heating;

T=160°C; 1 h;

1: 1.) NaH (50percent oil dispers.) / 1.) THF, 30 min, 0 deg C, 2.) 2 h, reflux 2: 10.1 percent / N,N-dimethyl-acetamide / 4 h / 140 °C View Scheme