1: 88 percent / p-toluenesulphonic acid monohydrate / benzene / Heating 2: 88 percent / Pd(PPh3), CF3COOH / benzene / 20 h / 50 °C / other allylenamines; var. temperatures, reagents, and solvents 3: 2 N HCl / benzene / 1 h / Ambient temperature 4: 90 percent / LiAlH4 / diethyl ether 5: 1.) mercuric acetate, 2.) NaBH4, 3 M NaOH / 1.) THF/H2O, 15 h, 2.) View Scheme

1: 0.5 N HCl / benzene / 1 h / Ambient temperature 2: 90 percent / LiAlH4 / diethyl ether 3: 1.) mercuric acetate, 2.) NaBH4, 3 M NaOH / 1.) THF/H2O, 15 h, 2.) View Scheme

sodium hydroxide; sodium tetrahydroborate; mercury(II) diacetate 1.) THF/H2O, 15 h, 2.); Yield given. Multistep reaction;