Dess-Martin periodane in dichloromethane T=0°C; 1 h;

1: With N-ethyl-N,N-diisopropylamine; isobutyl chloroformate in tetrahydrofuran T=-10°C; 0.5 h; 2: With sodium tetrahydroborate in tetrahydrofuran; water T=20°C; 0.333333 h; 3: With hydrogenchloride in water

1: 100 percent / AlCl3 / CH2Cl2 / 1.) 0 deg C; 2.) ambient temp. 4 h; 3.) reflux, 2.5 h 2: 60 percent / NaOCl / H2O / 4.5 h / Heating 3: 55.5 percent / LiAlH4 / diethyl ether / 1.) reflux, 3 h; 2.) room temperature, 14 h View Scheme

1: 60 percent / NaOCl / H2O / 4.5 h / Heating 2: 55.5 percent / LiAlH4 / diethyl ether / 1.) reflux, 3 h; 2.) room temperature, 14 h View Scheme

pyridine; phosphorus tribromide in benzene T=55°C; 6 h;