1: 1.) potassium hydride / 1) DMF, room temperature, 45 min; 2) 0 deg C --> room temperature, 1 h 2: 97 percent / diethyl ether / 0.33 h / Ambient temperature 3: 88 percent / Bu3SnH, AIBN / benzene / 0.75 h / Heating 4: 94 percent / Lawesson's reagent / benzene / 1 h / Heating 5: ethanol / 0.25 h / Heating 6: potassium nitrosodisulfate, sodium dihydrogen phosphate / acetone; H2O 7: 72 percent / NH3 / CH2Cl2 / 96 h / Ambient temperature View Scheme

in 4-benzyloxy-5-ethoxyindole