potassium hydroxide; hydrogen; palladium on activated charcoal in methanol 1 h; Ambient temperature;

1: H2 / Pd/C 2: 57 percent / SO2Cl2 / CCl4 / 8 h / Heating 3: 45 percent / AlCl3 / CH2Cl2 / 1.) 5 deg C, 30 min, 2.) RT, 1 h, 3.) 40 deg C, 30 min View Scheme