sulfuric acid

perchloric acid; thallium(III) nitrate in chloroform 21 h; Ambient temperature; Yield given;

potassium hydroxide; N-benzyl-N,N,N-triethylammonium chloride 1) CH2Cl2, room temperature, 3 h, 2) reflux, 8 h; Yield given. Multistep reaction;