tetrakis(triphenylphosphine) palladium(0); potassium carbonate in ethanol; toluene T=55°C; 336 h;

1: 55 percent / 1.) n-BuLi, 2,2,6,6-tetramethylpiperidine; 2.) I2 / tetrahydrofuran; hexane / -70 °C / 1.) 1.5 h; 2.) 10 min 2: 78 percent / Pd(PPh3)4, K2CO3 / ethanol; toluene / 336 h / 55 °C View Scheme

trichlorophosphate

zinc