1: 87 percent / Et3N, copper(I) iodide / Pd(PPh3)4 / dimethylformamide / 2 h / 50 °C 2: 91 percent / tetrabutylammonium fluoride / methanol / 0.5 h View Scheme

copper(l) iodide; triethylamine; tetrakis(triphenylphosphine) palladium(0) in N,N-dimethyl-formamide T=50°C; 2 h;