1: DCC, / ethyl acetate 2: 1.) K2CO3, Cu, 2.) alkali / 1.) mesitylene, reflux, 22 h 3: 95 percent / HCl / ethanol 4: 100 percent / LiAlH4, AlCl3 / tetrahydrofuran / Ambient temperature 5: 100 percent / NaH / xylene / Heating View Scheme

1: DCC, / ethyl acetate 2: 1.) K2CO3, Cu, 2.) alkali / 1.) mesitylene, reflux, 22 h 3: 95 percent / HCl / ethanol 4: NaBH4 / dioxane; H2O / 50 °C 5: Al2O3 CBT 1 (PECHINEY) / benzene / Heating 6: NaH / tetrahydrofuran; hexamethylphosphoric acid triamide / Heating View Scheme