1: 81.5 percent / 85percent H3PO4, P2O5 / benzene / 20 h / Heating 2: 60.3 percent / SnCl4 / benzene / 5 h / Ambient temperature View Scheme

T=564.75°C; Kinetics; Further Variations:Temperatures;

1: methyl-phenyl-thioether With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; 2: 1,2-epoxy-2-methyl-propane in tetrahydrofuran; hexane T=20°C; 12 h;

sodium hydroxide; potassium tert-butylate in tetrahydrofuran; N,N-dimethyl-formamide

in tetrahydrofuran; diethyl ether 36 h; Heating;

potassium tert-butylate in N,N-dimethyl-formamide 24 h;

phosphoric acid; phosphorus pentoxide in benzene 20 h; Heating;

in sodium-dried benzene

3-chloro-benzenecarboperoxoic acid in dichloromethane

1: 81.5 percent / 85percent H3PO4, P2O5 / benzene / 20 h / Heating 2: 60.3 percent / SnCl4 / benzene / 5 h / Ambient temperature 3: 94 percent / LiAlH4 / diethyl ether / 24 h / Heating 4: 73.1 percent / methanol / 26 h / Ambient temperature 5: 1.) n-BuLi / 1.) ether, hexane, 5 min, 2.) ether, hexane, RT, 36 h View Scheme