1.1: mCPBA / CH2Cl2 / 16 h / 20 °C 2.1: trifluoroacetic anhydride / CH2Cl2 / 16 h / 0 - 20 °C 2.2: lithium hydroxide / CH2Cl2; H2O / 16 h / 20 °C View Scheme

1: 90 percent / POCl3 / Heating 2: 100 percent / 35percent peracetic acid / tetrahydrofuran / Heating 3: 98 percent / 5 h / 110 °C 4: 90 percent / 10percent aq. potassium carbonate / methanol / 5 h / Ambient temperature View Scheme

sodium tetrahydroborate; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct; N,N,N',N,-tetramethylethylenediamine in tetrahydrofuran T=25°C; 0.5 h; Inert atmosphere;