trichlorophosphate 0.5 h; Heating; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

3-chloro-benzenecarboperoxoic acid in 1,2-dichloro-ethane T=70°C; Title compound not separated from byproducts;

maleic anhydride; dihydrogen peroxide in chloroform 1) r.t., overnight, 2) reflux, 3 h;

1: 34 percent / KOH / ethanol / 5 h / Heating 2: 76 percent / 90percent H2O2, maleic anhydride / CH2Cl2 / 1) r.t., overnight, 2) reflux, 2 h 3: 1 h / Heating 4: 10percent KOH / methanol / 1 h / Heating 5: POCl3, PCl5 / 1 h / 160 °C 6: 25 percent / 90percent H2O2, maleic anhydride / CHCl3 / 1) r.t., overnight, 2) reflux, 3 h View Scheme

1: 76 percent / 90percent H2O2, maleic anhydride / CH2Cl2 / 1) r.t., overnight, 2) reflux, 2 h 2: 1 h / Heating 3: 10percent KOH / methanol / 1 h / Heating 4: POCl3, PCl5 / 1 h / 160 °C 5: 25 percent / 90percent H2O2, maleic anhydride / CHCl3 / 1) r.t., overnight, 2) reflux, 3 h View Scheme

1: 1 h / Heating 2: 10percent KOH / methanol / 1 h / Heating 3: POCl3, PCl5 / 1 h / 160 °C 4: 25 percent / 90percent H2O2, maleic anhydride / CHCl3 / 1) r.t., overnight, 2) reflux, 3 h View Scheme

1: 10percent KOH / methanol / 1 h / Heating 2: POCl3, PCl5 / 1 h / 160 °C 3: 25 percent / 90percent H2O2, maleic anhydride / CHCl3 / 1) r.t., overnight, 2) reflux, 3 h View Scheme

1: POCl3, PCl5 / 1 h / 160 °C 2: 25 percent / 90percent H2O2, maleic anhydride / CHCl3 / 1) r.t., overnight, 2) reflux, 3 h View Scheme