aluminium trichloride 2 h; Ambient temperature;

1: toluene / 3 h / Ambient temperature 2: 1.) n-Bu4N<Fe(CO)3NO>, 3.) 4 M aq. HCl View Scheme

1: PCl5 / benzene / 3 h / Ambient temperature 2: 62 percent / AlCl3 / 2 h / Ambient temperature View Scheme

hydrogenchloride; n-Bu4Nlt;Fe(CO)3NOgt; Yield given. Multistep reaction;

1: 75 percent / hydrazine hydrate, concd HCl / ethanol / 4 h / Heating 2: 48 percent / sulfuryl chloride / CH2Cl2 / 1 h / Ambient temperature 3: 74 percent / Na, diethyl malonate / benzene; ethanol / 2 h / Heating 4: 10 percent / toluene / 4 h / Heating View Scheme