1: POCl3, KCl / 0.2 h / Heating 2: 0.25 N NaOMe / 1 h / Ambient temperature 3: 79 percent / FeSO4*7H2O, tert-butyl hydroperoxide / acetic acid; H2O / 0.02 h 4: Cu-Al alloy, 5 N NaOH / 0 h / Heating 5: 85 percent / 1 N NaOH / dioxane / 0.33 h / Heating 6: 32 percent / 1.) 1 N NH3, amalgamated Al; 2.) air / Ambient temperature; 1.) 35 min; 2.) 30 min View Scheme

1: POCl3, KCl / 0.2 h / Heating 2: 0.25 N NaOMe / 1 h / Ambient temperature 3: 79 percent / FeSO4*7H2O, tert-butyl hydroperoxide / acetic acid; H2O / 0.02 h 4: Cu-Al alloy, 5 N NaOH / 0 h / Heating 5: 85 percent / 1 N NaOH / dioxane / 0.33 h / Heating View Scheme

1: POCl3, KCl / 0.2 h / Heating 2: 0.25 N NaOMe / 1 h / Ambient temperature 3: 79 percent / FeSO4*7H2O, tert-butyl hydroperoxide / acetic acid; H2O / 0.02 h 4: Cu-Al alloy, 5 N NaOH / 0 h / Heating View Scheme