thionyl chloride in toluene T=70°C; 1 h;

1: 95 percent / H2 gas / platinic oxide / ethanol / Ambient temperature 2: 1.) NaNO2, 2N HCl; 2.) cuprous cyanide / 1.) water, 0 deg C, 35 min; 2.) water, 60 deg C, 40 min 3: SOCl2 / toluene / 1 h / 70 °C View Scheme

1: 1.) NaNO2, 2N HCl; 2.) cuprous cyanide / 1.) water, 0 deg C, 35 min; 2.) water, 60 deg C, 40 min 2: SOCl2 / toluene / 1 h / 70 °C View Scheme