1: 95 percent / SOCl2 / 5.5 h / Heating 2: 42 percent / N2H4*H2O / ethanol / 8 h / 80 °C View Scheme

thionyl chloride Dehydration; 5.5 h; Heating;

1: 86 percent / tri-o-tolylphosphine, Et3N / Pd(II) acetate / acetonitrile / 24 h / 120 °C / 22800 Torr 2: 75 percent / O2, 1,3-propanediol / PdCl2, CuCl / 1,2-dimethoxy-ethane View Scheme

1: 95 percent / SOCl2 / 5.5 h / Heating 2: 39 percent / N2H4*H2O / ethanol / 8 h / 80 °C View Scheme